Reposiório IPEN: Recent submissions

  • IPEN-DOC 24208

    BARBEZAN, ANGÉLICA B. . Estudos in vitro da genotoxicidade e citotoxicidade em células hepáticas da formação de 2-alcilciclobutanonas resultantes da irradiação de alimentos que contenham gordura / In vitro studies of genotoxicity and cytotoxicity in hepatic cells of 2-alkylcyclobutanones formation resulting from irradiation of foods containing fat . 2017. Tese (Doutorado em Tecnologia Nuclear) - Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP, São Paulo. 132 p. Orientador: Anna Lucia Casañas Haasis Villavicencio. DOI: 10.11606/T.85.2017.tde-07122017-104438

    Abstract: A irradiação de alimentos já foi aprovada e vem sendo utilizada em diversos países para aplicações e finalidades de uma ampla variedade de alimentos. Seus benefícios abrangem o aumento do prazo de validade, melhoria de higiene dos alimentos e consequentemente menor deterioração e perdas se comparado com alimentos que não sofrem radiação. Além disto, os alimentos após irradiados apresentam-se seguros em termos nutritivos e de redução de patógenos. Porém, alimentos que contem de médio a alto teor de gordura induzem a formação de um subproduto denominado 2-Alcilciclobutanonas, a qual sabemos que parte destes compostos ingeridos são normalmente excretados através das fezes, porém parte permanece depositada nos tecidos adiposos. Trabalhos realizados com estes compostos anteriormente apresentaram efeitos citotóxicos e genotóxicos em células de cólon. Desta forma, o objetivo do presente trabalho foi investigar os efeitos citotóxicos realizados em testes de viabilidade celular, testes genotóxicos em micronúcleo e testes mutagênicos com a técnica de Ames em condições experimentais in vitro dos compostos 2-dDCB e 2-tDCB. Para isso, o fígado foi o órgão de escolha para avaliar os possíveis efeitos destes compostos, uma vez que este órgão é geralmente acometido pelo acumulo de gordura. Foram utilizadas três linhagens hepáticas: HepG2, BRL3A e HTC. A análise dos resultados da viabilidade celular, revelou que as 2-dDCBs apresentaram discreto efeito citotóxico na concentração de 500 μM e as 2-tDCBs apresentaram danos baixos a partir de 100 μM e maiores em 500 μM, mostrando ser dose dependentes. Nos resultados de mutagenicidade, os compostos não apresentaram quaisquer efeitos mutagênicos nas concentrações e doses utilizadas, detectados pelo teste de Ames. Por fim, o ensaio de micronúcleo correspondeu às expectativas não demonstrando efeitos genotóxicos na linhagem, doses e tempos testados. Com base nos resultados atingidos, as 2 ACBs podem ser consumidas com relativa segurança, sob a ótica de possíveis efeitos mutagênicos e genotóxicos nas concentrações avaliadas.

    Palavras-Chave: food processing; irradiation; biological effects; radiation effects; toxicity; carboxylic acids; organic acids; ketones; liver cells; fat cells; tumor cells; neoplasms; bioassay; immunoassay; in vitro; comparative evaluations

  • IPEN-DOC 24207

    PENHALBEL, LUCIANO T.B. . Avaliação tribológica do par válvula e sede de válvula de admissão de um motor ciclo diesel em condições reais de funcionamento / Tribological evaluation of intake valve and valve seat of a diesel cycle engine in real operating conditions . 2017. Dissertação (Mestrado em Tecnologia Nuclear) - Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP, São Paulo. 126 p. Orientador: Marina Fuser Pillis. DOI: 10.11606/D.85.2017.tde-07122017-093905

    Abstract: A indústria automotiva exige produtos que trabalhem em condições extremas. O desenvolvimento de componentes é uma ação de aperfeiçoar os motores de combustão interna para que atinjam a vida requerida com níveis de desgaste aceitáveis, respeitando os limites legais de operação, como por exemplo, valores de emissões de poluentes. Diante dessas exigências, se faz necessário estudar componentes considerados críticos que conhecidamente influenciam no desempenho do motor. A tribologia do par válvula e sede de válvula de admissão é um importante conjunto que se deve ter atenção quanto ao seu desgaste, visto que pode influenciar na degradação do motor quanto aos parâmetros de emissões de poluentes e requisitos operacionais de manutenção e de vida do produto. O objetivo foi avaliar o comportamento do par tribológico, válvula e sede de válvula de admissão, submetidos a ensaios em dinamômetro e veiculares (condições reais de operação), quanto ao nível e tipo de desgaste ocorrido no par. Os resultados obtidos foram correlacionados com os requisitos de desempenho legais e operacionais de um motor ciclo diesel, como também foi realizada a caracterização do tipo de desgaste ocorrido no par tribológico e comparada com a literatura específica. Com base nos resultados, concluiu-se que ocorreu uma excelente compatibilidade entre a válvula e a sede da válvula de admissão; o nível de desgaste não prejudicou o desempenho do motor e as emissões de poluentes; o par tribológico atendeu aos requisitos de trabalho extremos, como operação em altas temperaturas e pressão de combustão com baixas taxas de desgaste; e os tipos de desgastes observados foram classificados como desgaste adesivo e sinais de deformação plástica.

    Palavras-Chave: tribology; wear; valves; diesel engines; boundary conditions; powder metallurgy; automotive industry; metallurgical effects; air pollution control

  • IPEN-DOC 24206

    SOUZA, JOSEILTON M. de . Avaliação da concentração de radionuclídeos naturais das séries U-238 e Th-232, K-40 e caracterização química inorgânica de perfis de solo e testemunhos de sedimento da área de influência do reservatório Taiaçupeba, estado de São Paulo / Assessment of the natural radionuclides concentrations from 238U and 232Th decay series, 40K and inorganic chemical characterization of soil profiles and sediment cores in the catchment area of the Taiaçupeba reservoir, São Paulo . 2017. Dissertação (Mestrado em Tecnologia Nuclear) - Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP, São Paulo. 139 p. Orientador: Sandra Regina Damatto. DOI: 10.11606/D.85.2017.tde-13122017-113518

    Abstract: O Reservatório Taiaçupeba, localizado no estado de São Paulo, na divisa dos municípios Mogi das Cruzes e Suzano, faz parte do Sistema Produtor Alto Tietê SPAT. A água deste reservatório é captada pela ETA da Sabesp para tratamento e distribuição, abastecendo 3,1 milhões de pessoas. Para se avaliar possíveis riscos à qualidade da água deste importante reservatório; foram coletados quatro perfis de solo e quatro testemunhos de sedimento na área de influência do reservatório. Este trabalho teve como objetivo avaliar a concentração de atividade dos radionuclídeos naturais 238U, 226Ra,210Pb, 232Th, 228Ra, 228Th e 40K e realizar a caracterização química inorgânica determinando os elementos As, Ba, Ce, Co, Cr, Cs, Eu, Hf, K, La, Lu, Nd, Rb, Sb, Sc, Se, Sm, Ta, Tb, Th, U, Yb e Zn no solo e sedimento marginal. As técnicas analíticas empregadas foram a espectrometria gama de alta resolução e a análise por ativação com nêutrons instrumental (INAA), repectivamente. Realisou-se a análise do fator de enriquecimento FE para avaliar a contribuição antrópica nas concentrações dos elemento químicos obtidos por INAA, utilizando como referência os valores da Crosta Continental Superior CCS. Analisou-se, também, a composição granulométrica, o conteúdo de água e o teor de matéria orgânica para auxiliar na interpretação dos resultados obtidos. Na análise granulométrica os perfis de solo apresentaram maiores percentuais de fração fina (silte + argila), enquanto que os testemunhos de sedimento apresentaram em sua maioria maiores percentuais de fração grossa (areia). Todos os perfis de solo apresentaram umidade praticamente constante, entre 10% e 20%. O sedimento apresentou variação no conteúdo de água, no geral reduzindo com a profundidade, sendo esta mais acentuada em um dos testemunhos. Em relação à matéria orgânica constatou-se maiores percentuais médios nos testemunhos de sedimento. No estudo das concentrações dos radionuclídeos naturais, verificou-se as maiores concentrações de atividade para os radionuclídeos 40K,232Th e 228Th, no solo, e 232Th e 210Pb, no sedimento. Em relação à caracterização química inorgânica do solo e sedimento foram determinados altos valores para os elementos As e Sb (40 mg.kg-1 e 2,9 mg.kg-1) quando comparados com os valores da CCS (1,5 mg.kg-1 e 0,2 mg.kg-1), respectivamente. Um dos testemunhos apresentou concentração elevadíssima para o elemento Zn (concentração máxima de 38157 mg.kg-1 e média de 6602,6 mg.kg- 1) quando comparada aos valores da crosta continental superior (71 mg.kg-1), indicando forte contribuição antrópica. Na análise do fator de enriquecimento, além dos elementos citados acima, outros elementos como Ce, Co, Cr, Cs, Eu Hf, La, Lu, Nd, Sm, Tb, Th, U e Yb também apresentaram contribuição antrópica.

    Palavras-Chave: natural radioactivity; concentration ratio; uranium 238; thorium 232; potassium 40; sediments; ground water; soils; radiochemistry; gamma radiation; gamma spectroscopy; neutron activation analysis; water reservoirs; brazil

  • IPEN-DOC 24205

    SILVA, JEFFERSON de J. . Radiomarcação de inibidor de PSMA com 177Lu e avaliação biológica do potencial para aplicação no tratamento do câncer de próstata / Radiolabeling of PSMA inhibitor with 177Lu and biological evaluation of potential for application in the treatment of prostate cancer . 2017. Dissertação (Mestrado em Tecnologia Nuclear) - Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP, São Paulo. 133 p. Orientador: Elaine Bortoleti de Araújo. DOI: 10.11606/D.85.2017.tde-07122017-110519

    Abstract: O câncer de próstata é considerado o segundo mais comum na população masculina em todo o mundo e ocupa a 15ª posição em mortes por câncer, em homens, representando cerca de 6% do total de mortes por câncer no mundo. O antígeno de membrana prostático específico (PSMA) é uma glicoproteína tipo II transmembrânica superexpressa no câncer de próstata, suas metástases e em neovascularizações relacionadas a tumores sólidos, que tem estimulado o desenvolvimento de pequenas moléculas inibidoras do receptor de PSMA, que carreguem agentes terapêuticos. Este trabalho pretendeu estudar de forma inédita a marcação e estabilidade radioquímica do Glu-NH-CO-NH-Lys(Ahx)-DOTA com 177Lu (PSMA-DOTA-177Lu) e avaliar seu potencial para a terapia do câncer de próstata. O radiofármaco foi obtido com pureza radioquímica elevada (PR > 95%) em todas as condições estudadas e permaneceu inalterada em ≤ - 20 °C até 48 horas, mesmo em atividade específica alta (74 MBq/μg). O ensaio de ligação específica do PSMADOTA- 177Lu mostrou que a fração do peptídeo que se ligou às células LNCaP de tumor de próstata foi de 1,79 ± 0,21 %, 2,47 ± 0,03 %, 3,07 ± 0,01 % e 4,13 ± 0,27%, para as concentrações de 0,15 x 106, 0,3 x 106, 0,5 x 106 e 1 x 106 células, respectivamente. O ensaio de internalização do PSMA-DOTA-177Lu sugere que o maior percentual da ligação específica do radiofármaco às células LNCaP corresponde à fração da ligação de superfície (99,03 ± 0,84 %). Os parâmetros farmacocinéticos determinados no estudo in vivo em camundongos Balb/c são compatíveis com o rápido clareamento sanguíneo e excreção renal, além de apresentar apreciável captação tumoral in vivo (2,76 ± 1,21 % Al/g) após 4 horas de administração do radiofármaco. Os estudos em estabilidade em soro humano demonstram estabilidade alta do radiofármaco PSMA-DOTA-177Lu por um período de até 24 horas, que foi confirmada pela baixa captação óssea demonstrada nos estudos in vivo de biodistribuição. O estudo de variação da atividade possibilitou estabelecer a atividade específica ideal (MBq/μg), que será extrapolada para um piloto de produção do radiofármaco. Os resultados favoráveis deste estudo encorajam a perspectiva de realização de ensaio clínico controlado deste novo radiofármaco, avaliando seu potencial para aplicação no tratamento do câncer de próstata.

    Palavras-Chave: lutetium 177; radiotherapy; prostate; neoplasms; peptides; receptors; biological localization; enzyme inhibitors; radiopharmaceuticals; gamma radiation; neutron activation analysis

  • IPEN-DOC 24204

    NOYORI, AMANDA . Estudo sobre determinação de alumínio em amostras ambientais pelo método de análise por ativação com nêutrons / A study on aluminum determination in environmental samples by neutron activation analysis . 2017. Dissertação (Mestrado em Tecnologia Nuclear) - Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP, São Paulo. 84 p. Orientador: Mitiko Saiki. DOI: 10.11606/D.85.2017.tde-07122017-113255

    Abstract: As determinações de alumínio são de grande interesse devido à sua toxicidade e sua ampla distribuição no meio ambiente. Além disso as determinações deste elemento por métodos analíticos convencionais apresentam dificuldades devido aos problemas da contaminação da amostra. O método de análise por ativação com nêutrons (NAA) para determinação de Al possui vantagens de rapidez na análise e de alta sensibilidade. Entretanto, neste método ocorrem os problemas de reações nucleares de interferência de P e Si. O Al na NAA é determinado pela medida do 28Al formado na reação 27Al (n, γ) 28Al, o mesmo radioisótopo formado nas reações nucleares 31P (n, α) 28Al e 28Si (n, p) 28Al. O objetivo deste estudo foi determinar Al pela NAA em amostras ambientais, fazendo a correção das interferências usando fatores de correção e dispondo das concentrações de P e de Si das amostras. Neste estudo foram analisados os materiais de referência certificados (MRCs) e amostras de biomonitores (cascas de árvore e líquen). O procedimento experimental consistiu na irradiação curta de uma alíquota de amostra no reator IEA-R1 juntamente com o padrão de Al, seguida de espectrometria de raios gama. O P foi determinado pela medida da radiação beta do 32P usando um contador Geiger-Müller. O Si foi determinado por meio da irradiação com nêutrons epitérmicos e medida do 29Al formado na reação 29Si (n,p) 29Al. Os resultados da determinação de Al, P e Si nos MRCs apresentaram uma boa precisão e exatidão com |Z-score| ≤ 2. As concentrações de Al obtido nos biomonitores variaram de 253 a 15783 μg g-1 e no caso da determinação de P e Si as concentrações destes elementos variaram de 283 a 1946 μg g-1 e de 0,11 a 7,8 %, respectivamente. Nos biomonitores analisados, as taxas de contribuição de interferência de P e de Si na determinação de Al foram da ordem de 2,0 % e esta contribuição depende das relações entre as concentrações dos interferentes e a do Al na amostra. Os limites de detecção de Al na análise dos biomonitores foram inferiores às suas concentrações demonstrando que procedimento de NAA proposto pode ser aplicado na determinação de Al neste tipo de matriz.

    Palavras-Chave: aluminium; contamination; sampling; radioassay; environment; environmental effects; interference; nuclear reactions; neutron activation analysis; comparative evaluations

  • IPEN-DOC 24203

    OLIVEIRA, ALINE S.G.R. de . Radioatividade natural, elementos maiores e traços determinados em produtos nacionais derivados da Nicotiana tabacum L. / Natural radioactivity, major and trace elements determined in Brazilian products derived from Nicotiana tabacum L. . 2017. Dissertação (Mestrado em Tecnologia Nuclear) - Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP, São Paulo. 174 p. Orientador: Sandra Regina Damatto. DOI: 10.11606/D.85.2017.tde-13122017-105430

    Abstract: O consumo de tabaco é uma das principais causas de doenças e morte prematuras no mundo; é a segunda droga mais consumida entre os adolescentes brasileiros, sendo considerado uma importante porta de entrada para o uso de drogas ilícitas. O Brasil é o segundo produtor mundial de tabaco e desde de 1993 destaca-se como o maior exportador. Os radionuclídeos naturais das séries do 232Th e 238U são encontrados no tabaco em baixas concentrações absorvidos diretamente do solo ou por deposição foliar. No ato de fumar ocorre a transferência desses radionuclídeos através da queima do tabaco para os tecidos e órgãos humanos podendo gerar lesões cancerígenas, sendo o mais relevante o câncer de pulmão. Existem poucos dados sobre a caracterização radiológica e elementar dos derivados do tabaco brasileiros, o que torna relevante o presente estudo que teve como objetivos a determinação da radioatividade natural e da concentração de elementos maiores e traços em derivados de tabaco produzidos e comercializados no Brasil. As técnicas analíticas empregadas foram alfa e beta total após separação radioquímica para os radionuclídeos 226Ra, 228Ra e 210Pb com determinação em detector proporcional de fluxo gasoso e baixa radiação de fundo, espectrometria alfa após separação radioquímica para o radionuclídeo 210Po, análise por ativação com nêutrons instrumental (INAA) e fluorescência por dispersão de raios X (EDXRF) para determinação de 238U, 232Th, elementos maiores e traços. Foram analisados produtos derivados da Nicotina tabacum L. de diferentes marcas adquiridas em tabacarias: cigarro não aromatizados, cigarro aromatizado, charuto, rapé, cigarro de palha e fumo de corda. Pela técnica de INAA foi possível determinar a concentração de 19 elementos e pela técnica de EDXRF de 31 elementos o que possibilitou uma ampla caracterização multielementar e as técnicas analíticas empregadas se mostraram complementares. Os elementos que apresentaram maiores valores de concentração foram o Ca e o K entre todas as amostras amostragem e entre todos os radionuclídeos naturais determinados o 228Ra apresentou maiores valores de concentração de atividade. A partir da concentração de atividade determinada foram calculadas a dose anual estimada e a dose anual efetiva para os radionuclídeos 210Pb e 210Po, levando-se em consideração um consumo anual de 3,65 kg de tabaco por ano. A dose anual efetiva variou de 69,5 μSv ano-1 à 121 μSv ano-1. Os produtos que apresentaram maiores valores de concentração e consequentemente maiores valores de dose anual efetiva, para a maioria dos radionuclídeos analisados, foram os cigarros de palha e fumos de corda.

    Palavras-Chave: natural radioactivity; concentration ratio; uranium 238; thorium 232; fertilizers; substrates; soils; radiochemistry; x-ray fluorescence analysis; neutron activation analysis; brazil

  • IPEN-DOC 24127

    CARVALHO, VITORIA S. de ; ROSTELATO, MARIA E.C.M. . Estudo de caracterização dos rejeitos radioativos gerados no laboratório de produção de fontes para braquiterapia. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: brachytherapy; radioactive waste management; iodine 125; calculation methods

  • IPEN-DOC 24126

    SANTOS, VITOR F. dos ; SPINACE, ESTEVAM V. . Preparação de eletrocatalisadores Pt-SnO2/C a partir de SnO2 com diferentes morfologias para aplicação na oxidação eletroquímica do etanol. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: catalysts; nanoparticles; platinum; tin oxides; ethanol

  • IPEN-DOC 24125

    FERNANDES, VANESSA C. ; FORBICINI, CHRISTINA A.L.G. de O. . Preparação, via redução por borohidreto de sódio, e caracterização de eletrocatalisadores PtLa/C para eletro-oxidação direta de etanol em células a combustível alcalinas. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: electrocatalysts; oxidation; sodium; borohydrides; ethanol

  • IPEN-DOC 24124

    FONSECA, THAIS N. ; MOURA, EDUARDO de ; GERALDO, AUREA B.C. . Estudo da oxidação da bixina por irradiação e aplicação em materiais resinosos. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: seeds; oxidation; pigments; radiation effects; resins; dyes

  • IPEN-DOC 24123

    CRISPIM, STEPHANE P. ; GATTI, LUCIANA V. . Extração de isótopos estáveis de co2 por sublimação para determinação do balanço de carbono da bacia amazônica. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: carbon; emission; isotopes; amazon river

  • IPEN-DOC 24122

    CAVALLARI, ROGER V. ; FERREIRA, JOAO C. . Uso do Reformador a Vapor do Etanol e Vinhaça de Cana para Geração de Hidrogênio. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: ethanol fuels; coal; catalysts; hydrogen

  • IPEN-DOC 24120

    DUTRA, RODRIGO da C. ; KODAMA, YASKO . Estudo da aplicação do policarbonato no gerador de 99Mo/99mTc. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: polycarbonates; molybdenum 99; technetium 99; gamma radiation

  • IPEN-DOC 24119

    SOUZA, RODINEY R. de ; OLIVEIRA NETO, ALMIR ; LAZAR, DOLORES R.R. . Avaliação da influência de pós de titânia associado a óxido de grafeno reduzido para aplicação como suporte de catalisadores de células a combustível de membrana polimérica. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: titanium oxides; graphene; electrocatalysts; polymers

  • IPEN-DOC 24118

    FREIRE, RENAN P. ; SOARES, CARLOS R.J. . Expressão da tireotrofina humana (hTSH) em células de rim de embrião humano (Expi293F™) cultivadas em suspensão. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: hormones; embryos; kidneys; trh; animal cells; cho cells; physical chemistry

  • IPEN-DOC 23499

    TEIXEIRA, PAULA dos S. ; MOURA, EDUARDO de ; GERALDO, AUREA B.C. . Irradiação da biomassa de sementes de urucum (Bixa orellana L.) para aplicação em compósitos poliméricos. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: biomass; irradiation; seeds; composite materials; polymers

  • IPEN-DOC 23498

    SILVA, PAULA C.M. ; GUEDES-SILVA, CECILIA C. . Influência de fases piezoelétricas na tenacidade à fratura da alumina. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: piezoelectricity; fracture properties; aluminium oxides; density; porosity; ceramics

  • IPEN-DOC 23497

    SEVERICH, PATRICK ; KODAMA, YASKO . Enxertia de N-Vinil Pirrolidona em celulose com uso de radiação ionizante. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: grafts; ionizing radiations; pyrrolidones; monomers; cellulose; polymers

  • IPEN-DOC 23496

    NASCIMENTO, NATALIA M. do ; CARBONARI, ARTUR W. . Síntese de Perovskitas duplas LaBaMn2O6 por dois métodos para a incorporação dos núcleos de prova 111Cd e 140Ce utilizados em medições de espectroscopia PAC. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: perovskites; cadmium 111; cerium 140; manganese compounds; synthesis; sol-gel process

  • IPEN-DOC 23495

    ORMENIO, MATHEUS B. ; ROGERO, SIZUE O. ; ROGERO, JOSE R. . Estudo da ecotoxicidade aguda do resveratrol em Daphnia similis irradiadas e não irradiadas. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: polyphenols; antioxidants; daphnia; drugs; gamma radiation; irradiation; lethal doses; radiation effects; toxicity

  • IPEN-DOC 23494

    ANGELINI, MATHEUS ; FAVARO, DEBORAH I.T. . Avaliação e distribuição de metais, elementos traço e terras raras em perfis de sedimentos do reservatório de promissão, estado de São Paulo, por INAA. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: water pollution; water reservoirs; sediments; elements; trace amounts; radioecological concentration; calibration standards; enrichment; neutron activation analysis

  • IPEN-DOC 23493

    BELLONI, MARCIO ; CONTI, THADEU das N. . Geração de energia elétrica por fusão termonuclear controlada. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: thermonuclear reactors; electric power; power generation; lithium

  • IPEN-DOC 23492

    LEAL, LUIS G.M. ; ZAMBONI, CIBELE B. . Caracterização multielementar da própolis de scaptotrigona aff. postica utlizando técnicas analíticas. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: bees; honey; multi-element analysis; toxicity

  • IPEN-DOC 23491

    FAGA, LUCAS J. ; STEFANI, GIOVANNI L. de . Validação das principais bibliotecas nucleares utilizadas em reatores de tório com o código serpent. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: thorium; reactors; benchmarks; computerized simulation; monte carlo method

  • IPEN-DOC 23490

    AMARAL, LUCAS F. do ; MUCCILLO, ELIANA N. dos S. . Síntese e caracterização de eletrólitos sólidos de CeO2-(Gd2O3)1-x(M2O3)x, M=Nd e Sm. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: solid electrolytes; solid electrolytes; gadolinium oxides; cerium oxides; doped materials; synthesis

  • IPEN-DOC 23489

    FERREIRA, LUCAS A. dos S. ; BALDOCHI, SONIA L. . Crescimento de fibras monocristalinas de BaF2 dopado com íons terras raras. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: doped materials; barium fluorides; monocrystals; ions; lasers

  • IPEN-DOC 23488

    RIBEIRO, LEANDRO de J. ; MESQUITA, CARLOS H. ; HAMADA, MARGARIDA M. . Desenvolvimento de projeto mecânico e eletrônico para tomógrafo industrial de primeira geração. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: computerized tomography; fuel plates; reactors; multiphase flow

  • IPEN-DOC 23487

    BARROS, JULIO O.A. de ; POLITANO, RODOLFO . Análise dinâmica e mecânica de madeiras brasileiras. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: trees; wood; elasticity; mechanical properties; viscosity

  • IPEN-DOC 23486

    OLIVEIRA JUNIOR, JULIO de ; VICENTE, ROBERTO . Concentrações típicas de radionuclídeos dos rejeitos radioativos em reatores de água pressurizada. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: radioactivity; radioisotopes; isotope ratio; radioactive wastes; pwr type reactors

  • IPEN-DOC 23485

    SILVA FILHO, JORGE C. ; TAKIISHI, HIDETOSHI . A importância do processamento na redução térmica do Óxido de grafeno. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: graphene; oxide minerals; fourier transformation; infrared radiation; infrared spectrometers

  • IPEN-DOC 23484

    FLORES, JOAO P. de O. ; SEMMLER, RENATO . Caracterização do fluxo de nêutrons epitérmicos do reator IEA-R1 utilizando o método bare triple monitor para o uso em análise por ativação. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: neutron flux; neutron activation analysis; neutron spectra; monitors; epithermal neutrons

  • IPEN-DOC 23483

    ALVES, ISIS C. ; SILVA, PAULO S.C. da . Caracterização Química e Radiológica do depósito de argila conhecido como Lama Negra de Peruíbe. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: clays; chemical composition; therapeutic uses; deposits; black sands; neutron activation analysis

  • IPEN-DOC 23481

    GREGORIO, GUILHERME S. ; AYOUB, JAMIL M.S. . Eletro catalisadores PdAu/C para oxidação de metano em meio ácido. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: electrocatalysts; oxidation; palladium; gold; carbon; methane

  • IPEN-DOC 23480

    MORSELLI, GIOVANNI R. ; LUGAO, ADEMAR B. . Síntese verde de nanopartículas de prata utilizando extrato de acerola (Malpighia emarginata D.C.). In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: nanotechnology; silver; nanoparticles; fruits

  • IPEN-DOC 23479

    MASET, GIOVANNA L. ; COUTO, ANTONIO A. . Estudo da microestrutura da liga ti-6al-4v nitretada superficialmente por plasma e influência de elementos de liga à base tial nas propriedades mecânicas desta liga. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: nitrides; titanium alloys; microstructure; corrosion resistant alloys

  • IPEN-DOC 23478

    GOMES, GABRIELA V. ; ZEZELL, DENISE M. . Novo fotoabsorvedor para irradiação com laser de Nd:YAG na prevenção de erosão em dentina. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: dentistry; lasers; dentin; erosion; neodymium lasers

  • IPEN-DOC 23477

    RODELLA, EVERTON F. ; KOMATSU, LUIZ G.H. ; PARRA, DUCLERC F. . Estudo da incorporação de nanopartículas de prata em polietileno visando atividade biocida. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: nanotechnology; nanoparticles; silver; polyethylenes; antimicrobial agents; silver ions; germicides

  • IPEN-DOC 23476

    GUEDES, ELIANE D.F. da S. ; ARTHUR, VALTER . Efeitos da radiação gama em farinha de jatobá. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

  • IPEN-DOC 23475

    SILVA, ELAINE de J. ; SILVA, LEONARDO G. de A. e . Efeito da radiação Ionizante em nanocompósitos de poliestireno com argilas. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: ionizing radiations; nanocomposites; polystyrene; clays

  • IPEN-DOC 23474

    SILVA, DEBORAH Y.B. da ; MUCCILLO, ELIANA N. dos S. . Estudo da permissividade elétrica de óxidos mistos. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: dielectric materials; permittivity; oxides; bismuth oxides; copper oxides; titanium oxides

  • IPEN-DOC 23473

    OLIVEIRA, CINTIA C. de ; COTRIM, MARYCEL E.B. . Estimativa da carga poluidora do efluente - gerado no Instituto De Pesquisas Energéticas E Nucleares (São Paulo-Brasil). In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: water pollution; waste water; contamination; tracer techniques; liquid wastes; flow rate; metals

  • IPEN-DOC 23472

    RAMOS, CARLOS E.D. ; OLIVEIRA NETO, ALMIR . Eletro-oxidação do etanol em meio alcalino utilizando eletrocatalisadores PtCu/C. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: electrocatalysts; platinum; copper; carbon; ethanol

  • IPEN-DOC 23471

    SANTOS, CAMILA M.G. ; SANTIAGO, ELISABETE I. . Otimização dos parâmetros de fabricação de MEAs para células a combustível de membrana de troca protônica (PEMFC) de alto desempenho. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: fuel cells; proton exchange membrane fuel cells; electrodes; catalysts

  • IPEN-DOC 23470

    WATACABE, BEATRIZ N. ; VAZ, JORGE M. . Estudo da variação da razão de concentração de citrato de sódio e ouro na preparação de nanopartículas de ouro com radiação UV. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: gold; nanoparticles; sodium compounds; citrates; ultraviolet radiation; concentration ratio

  • IPEN-DOC 23469

    SCIARRETTA, BEATRIZ A. ; CARBONARI, ARTUR W. . Caracterização de filmes finos produzidos por Spin Coating utilizando método Sol-Gel. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: sol-gel process; thin films; spin; coatings; spin-on coating

  • IPEN-DOC 23468

    TAKAMOTO, ARISSA ; SAIKI, MITIKO . Aplicação da Análise por Ativação com Nêutrons na determinação da composição elementar de plantas medicinais. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: medicinal plants; neutron activation analysis; elements; concentration ratio

  • IPEN-DOC 23467

    MAMANI, ANA R.P. ; OLIVEIRA NETO, ALMIR . Eletro-Oxidação do metanol em meio alcalino utilizando eletrocatalisadores PtNi/C. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: oxidation; electrocatalysts; methanol; platinum; nickel; carbon

  • IPEN-DOC 23466

    SANTOS, ALLAN ; SILVA, PAULO S.C. . Estudo da composição elementar de Melissa officinalis de diferentes procedências por análise por ativação neutrônica. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: medicinal plants; neutron activation analysis; elements; chemical properties

  • IPEN-DOC 23464

    SANTOS, ALINE N. ; TAKIISHI, HIDETOSHI . Influência microestrutural da liga strip casting em ímãs TRFeB. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: castings; anisotropy; magnets; magnetic properties

  • IPEN-DOC 23463

    GOMES, ALISSANDRA de M. ; PERONI, CIBELE N. . Avaliação da melhora do fenótipo da osteogênese imperfeita tipo I em modelo murino utilizando a administração do gene do hormônio de crescimento de camundongo. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA; SEMINARIO ANUAL PIBIC, 23.; SEMINARIO ANUAL PROBIC, 14.; SEMINARIO ANUAL PIBITI, 7., 06-07 de dezembro, 2017, São Paulo, SP. Resumo expandido... São Paulo, SP: IPEN, 2017.

    Palavras-Chave: skeletal diseases; genetics; sth; mice

  • IPEN-DOC 24202

    BALDACONI, RICARDO H.; COSTA, FABIO E. da . Comparative response time and fault logging with a PLC and supervisory software and a standalone unit developed for recording. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: The Cobalt-60 irradiator of IPEN / CNEN, a category IV facility, has a security system for inter locking doors or exposure of radioactive sources made simultaneously by a programmable logic controller (PLC) model S7-200 from Siemens and a relay logic. From a set of information, both systems work together opening doors or exposing the sources. All incoming and outgoing information are sent serially via EIA232 communication to a personal computer with Windows® platform for a supervisory program which provides the monitoring of the entire process by a synoptic table on the computer screen and is also intended to keep records of all events on the computer's hard drive. A deficiency was found for the process of sending events via serial communication (EIA232) from PLC to the supervisory program. When failure occurred in a very short time, the PLC always took the right decision, but the registration process that had to go through the Windows® timeshare lost the information. In the previous work [1] developed a standalone electronics unit connected to the inputs and outputs of the security system, fully optocoupled to avoid any interference to the security system that records each event on a memory card. In this work, for checking the unit developed record time ability, transients incoming signals for simulating failures, were injected at security system inputs and the response time of security system, supervisory program and the autonomous unity were measured and compared.

    Palavras-Chave: comparative evaluations; computerized control systems; failures; logic circuits; monitoring; radiation protection; recording systems; security; transients

  • IPEN-DOC 24201

    COSTA, DIOGO R.; FREITAS, ARTUR C. . Thermal stability test of UO2-doped pellet manufactured at INB. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: The thermal stability test of UO2-doped pellet manufactured at INB was carried out in order to analyze the resintering behavior. This analysis is fundamental for predicting dimensional behavior during irradiation. INB commonly performs resintering test to qualify its production lots, and the same methodology was applied to UO2-doped pellets. In this preliminary study, three sets of experiments have been made: 1) without any chemical additive (Z test, the standard UO2 pellets - undoped); 2) UO2 pellets doped with 0.1, 0.2 and 0.3 wt% of Al2O3; and 3) 0.1, 0.2 and 0.3 wt% of Nb2O5. The preliminary results showed an increase in sintered density in all resintering experiments. So as to obtain the percentage increase, the theoretical densities (g/cm3 and %TD) were calculated based on the undoped UO2 pellets. All samples increased in a range of 0.27 to 0.32 %TD the out-pile densification during the resintering process. However, the Z(Nb)3 test showed the lowest value of 0.08 %TD, which is not in agreement with the INB specification limits. The sintered density of this test (0.3 wt% niobia) was 96.15% TD. This fact might be related to the competitive mechanism between Kirkendall effect, forming porosity owing to niobium solubilization on UO2 matrix, and densification process as a result of uranium diffusivity. Thus, the densification was only 0.08 %TD in Z(Nb)3 sample. All the other samples were in agreement with INB specification.

    Palavras-Chave: aluminium oxides; chemical properties; doped materials; fuel densification; fuel pellets; heat treatments; niobium oxides; performance testing; physical properties; sintering; stability; uranium oxides

  • IPEN-DOC 24200

    SALVETTI, T.C. ; MARUMO, J.T. . Survey of legal aspects, regulations, standards and guidelines applicable to radioactive waste management of the Brazilian Multipurpose Reactor – RMB. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: In Brazil, the Brazilian Nuclear Energy Commission (CNEN) and Brazilian Institute of Environment and Renewable Natural Resources (IBAMA) are the agencies responsible for the execution, regulation and control of nuclear and environmental policies, respectively. Such regulatory activities are very comprehensive (IBAMA) or too specific (CNEN), revealing other aspects that would, also, need to be observed so that the management could be carried out efficiently (quality) and effectively (safety), including the three governmental administrative levels: Federal, State and Municipal. In addition to laws, regulations, decrees and resolutions, there are also national and international standards and guides that provide guidelines for structuring the current management and the use of best regulatory practices. The Brazilian Multipurpose Reactor Enterprise (RMB) is a CNEN project, complying with a Multi-Year Plan of the Brazilian Ministry of Planning, Development and Management (MPDG). The Enterprise is being developed under the responsibility of the Directorate of Research and Development - DPD of CNEN and will have a facility for treatment and initial temporary storage of the radioactive waste generated by the operation of the research reactor and the activities carried out in the associated laboratories. The RMB will be built in the city of IPERÓ, located in the state of São Paulo, near ARAMAR Experimental Center of the Brazilian Navy. This work aims to present the research results regarding the various aspects that regulate, legislate and standardize the practices proposed to the Radioactive Waste Management of the RMB project.

    Palavras-Chave: construction; legal aspects; licensing; radioactive waste management; recommendations; regulations; research reactors; standards

  • IPEN-DOC 24199

    SEVERICH, PATRICK ; DUTRA, RODRIGO da C. ; KODAMA, YASKO . Preliminary studies on 1-vinyl-2-pyrrolidone grafting onto cellulose by pre-irradiation method. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Palavras-Chave: cellulose; electron beams; electron spin resonance; gamma radiation; graft polymers; monomers; paper; pyrrolidines

  • IPEN-DOC 24198

    SANTOS, PAULO de S. ; NGUNGA, DANIEL M.G. ; CAMARA, JULIO R. ; VASQUEZ, PABLO A.S. . Radioactive sealed sources production process for industrial radiography. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Since 1983, the Sealed Source Production Laboratory at the Nuclear and Energy Research Institute has been providing products and services to the private and governmental Brazilian users of industrial radiography and nucleonic control systems. Radioactive sealed sources are commonly used in nondestructive tests as radiography to make inspections and verify the internal structure and integrity of materials and in nucleonic gauges to control level, density, viscosity, etc. in on-line industrial processes. One of the most important activities carried out by this laboratory is related to the inspection of source projectors devices used in industrial radiography and its constituent parts as well as remote handle control assembly drive cable and guide tube systems. The laboratory also provide for the users iridium-192, cobalt-60 and selenium-75 sealed sources and performs quality control tests replacing spent or contaminated radiative sources. All discard of radioactive source is treated as radioactive waste. Additionally, administrative and commercial processes and protocols for exportation and transport of radioactive material are developed by specialized departments. In this work are presented the mean processes and procedures used by the Sealed Source Production Laboratory such as the arrival of the radioactive material to the laboratory and the source projectors, mechanical inspections, source loading, source leaking tests, etc.

    Palavras-Chave: cobalt 60; hot cells; industrial radiography; iridium 192; laboratories; production; sealed sources; selenium 75

  • IPEN-DOC 24197

    REIS, LUIS A.M. dos ; MUCSI, CRISTIANO S. ; TAVARES, LUIZ A.P. ; ALENCAR, MAICON C. ; GOMES, MAURILIO P. ; BARBOSA, LUZINETE P. ; ROSSI, JESUALDO L. . Recycling and melting process of the zirconium alloy chips. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Palavras-Chave: cleaning; electrodes; enriched uranium; fuel rods; melting; pwr type reactors; quality control; recycling; scrap; uranium 235; vacuum furnaces; zirconium alloys

  • IPEN-DOC 24196

    MORAD, CESAR M.; STEFANI, GIOVANNI L. de ; SANTOS, THIAGO A. dos. CANDU: study and review. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: The CANDU (Canadian Deuterium Uranium) is a nuclear reactor developed by AECL (Atomic Energy of Canada Limited). The first small-scale reactor is known as NPD and was made in 1955 and commenced operation in 1962. It is a pressurized heavy water reactor and uses D2O as moderator and coolant and therefore uses natural uranium as fuel. There have been two major types of CANDU reactors, the original design of around 500 MWe that was intended to be used in multi-reactor installations in large plants, and the rationalized CANDU6 which has units in Argentina, South Korea, Pakistan, Romania and China. Throughout the 1980s and 90s the nuclear power market suffered a major crash, with few new plants being constructed in North America or Europe. Design work continued through, however, and a number of new design concepts were introduced that dramatically improved safety, capital costs, economics and overall performance. These Generation III+ and Generation IV machines became a topic of considerable interest in the early 2000s as it appeared a nuclear renaissance was underway and large numbers of new reactors would be built over the next decade. The present work aims to study the reactors of the CANDU type, exploring from its creation to studies directed to G-III and G-IV reactors.

    Palavras-Chave: calandrias; candu type reactors; capacity; design; fuel channels; fuel cycle; fuel element clusters; historical aspects; performance; spent fuels

  • IPEN-DOC 24195

    NASCIMENTO, NATALIA M. ; BOSCH-SANTOS, BRIANNA ; SCIARRETA, BEATRIZ A. ; SANDALO, DANILO S.; CARBONARI, ARTUR W. . Teste de difusão do núcleo de prova 111In(111Cd) nos compostos: LaBaMn2O6 e LaBaCo2O6 "Double Perovskites" para a realização de medições utilizando a espectroscopia PAC. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Palavras-Chave: comparative evaluations; gamma spectroscopy; heat treatments; indium 111; perovskites; perturbed angular correlation; radioactive materials; sol-gel process; synthesis

  • IPEN-DOC 24194

    BETINI, EVANDRO G. ; GOMES, MAURILIO P. ; MILAGRE, MARIANA X. ; MACHADO, CARULINE S.C. ; REIS, LUIS A.M. ; MUCSI, CRISTIANO S. ; ORLANDO, MARCOS T.D.; LUZ, TEMISTOCLES S.; ROSSI, JESUALDO L. . Study on welding thermal cycle and residual stress of UNS S32304 duplex steel selected as external shield for a transport packaging of Mo-99. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Palavras-Chave: containers; gas tungsten-arc welding; molybdenum 99; nitrogen; residual stresses; stainless steels; temperature range 0400-1000 k; thermal cycling

  • IPEN-DOC 24193

    SANTOS, VINICIUS J. ; ZAFALON, ANGELICA T. ; LUGAO, ADEMAR B. ; PARRA, DUCLERC F. . Influence of gamma irradiation dose and concentration of laponite clay on poly (N-vinyl-2-pyrrolidone) hydrogels. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Hydrogels are polymeric biomaterials widely used in biomedicine and defined as an insoluble system of one or more crosslinked hydrophilic polymers, capable of absorbing large amounts of fluids without losing their physical integrity. Composed by one three-dimensional network of crosslinked polymer chains they can be synthesized by various physical and chemical methods including radiation. One of these methods is the gamma irradiation process, which forms the crosslinked network and sterilizes the material in a single step. In the biomedical field one of hydrogels applications is the transdermal dressings, these systems have an impact of great value in the treatment of wounds, as they can protect regions injured by burns, cuts and even chronic wounds. The association of clay to hydrogels promotes a modification of properties of these materials, such as swelling and gel fraction. Thus, the objective of this work was to evaluate the swelling properties and gel fraction of hydrogels based on polymer formulation of poly (N-vinyl-2-pyrrolidone), poly (ethylene glycol), agar containing nano-clay laponite RD in Different concentrations (0, 0.01, 0.1, 0.5, 1, 2, 5, 10, 20%). The materials were mixed by stirring and heating and then processed by gamma radiation from Co-60 at doses of 10, 25, 50 and 70 kGy. To evaluate the gel fraction, the membranes were immersed in water for 3 weeks. The swelling was evaluated after 48 hours of immersion in distilled water at room temperature. It was observed that as the clay concentration increases regardless of the irradiation dose the amount of gel fraction decreased and the amount of water absorption increased.

    Palavras-Chave: clays; cobalt 60; concentration ratio; cross-linking; gamma radiation; glycols; hydrogels; pvp; radiation doses; radiation effects; swelling

  • IPEN-DOC 24192

    SANTOS, TAMIRIS M.R. ; CAMPOS, LUIZA M.P. ; SANTOS, MARIANA de J. ; BOARO, LETICIA C.; PARRA, DUCLERC F. . Nfluence of radiation on the thermal and mechanical properties of BISGMA / TEGDMA based nanocomposites using pre-irradiated MMT nanoparticles as filler. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: In the present study was observed the influence of gamma radiation in thermal and mechanical properties of the experimental dental composites based on BISGMA/TEGDMA filled with pre-irradiated MMT nanoparticles (Cloisite® 20A). MMT nanoparticle was pre-irradiated at doses of 10, 15 and 70 kGy. As a control group MMT nanoparticle was added in the polymeric matrix without pre-irradiation. Four formulations of experimental nanocomposites were studied all with 50% wt of filler. The characterization of the experimental composites was performed by means of the following techniques: Thermogravimetry Analysis (TGA), Elastic Modulus and Flexural Strength. It was observed that the group filled with pre-irradiated nanoparticles at dose of 70 kGy showed a delay in the decomposition temperature when compared to the control group. For elastic modulus the results showed a proportional increase related to the dose of radiation applied in the MMT nanoparticle. Regarding flexural strength, the groups filled with pre–irradiated nanoparticles and the control group presented similar results.

    Palavras-Chave: composite materials; fillers; flexural strength; fourier transformation; gamma radiation; infrared spectra; nanocomposites; nanoparticles; polymers; radiation effects; thermal gravimetric analysis; thermodynamic properties

  • IPEN-DOC 24191

    FAGA, LUCAS J.; STEFANI, GIOVANNI L. de ; SANTOS, THIAGO A. dos. Validação das principais bibliotecas nucleares utilizadas em reatores de tório com o código Serpent. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Para garantir a precisão e relevância dos cálculos feitos para estudos e aplicações em tecnologia nuclear, é imprescindível que as bibliotecas de seção de choque utilizadas nas simulações computacionais para modelagem estejam apropriadamente validadas. Para isso é necessário verificar se os dados nucleares de seção de choque são capazes de reproduzir simulações de sistemas previamente analisados em benchmarks experimentais críticos e comparar os fatores macroscópicos encontrado, como o fator efetivo de multiplicação. O presente trabalho visa validar a biblioteca ENDF/B-VII, uma das bibliotecas que compõem o banco de dados padrão do código Serpent, para sistemas contendo U-233, U-235, Th-232, Pu-239 e Pu-240. O projeto servirá de suporte para os demais projetos do grupo de estudos recém-criado do Centro de Engenharia Nuclear (CEN) do IPEN, ligado ao estudo de diversos tipos de reatores e sua aplicação em ciclos de tório, assunto que ganha cada vez mais visibilidade pelas sólidas e potenciais promessas de revolução energética que traz. Os resultados obtidos ao fim das simulações foram satisfatórios, estando os fatores de multiplicação efetiva a uma distância próxima de 100 PCM dos valores fornecidos pelos benchmarks, como o esperado para uma biblioteca validada. A distância mínima entre esses valores foi de 2 PCM e a máxima de 280 PCM. A análise final demonstra que a biblioteca ENDF/B-VII possui dados nucleares validados para os isótopos de interesse e pode, portanto, ser utilizada nos futuros projetos do grupo de estudo de tório.

    Palavras-Chave: benchmarks; calculation methods; computerized simulation; flattop reactor; jezebel reactor; nuclear data collections; nuclear fuels; ornl-pca reactor; s codes; thor reactor; thorium; thorium reactors; validation

  • IPEN-DOC 24190

    QUEIROZ, C.A.S. ; PEDREIRA FILHO, W.R.; SENEDA, J.A. . Preparation of neodymium acetate for use in nuclear area and nanotechnology. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Neodymium and its compounds are being increasingly applied in the manufacture of new materials. In nuclear area neodymium isotopes are used in a variety of scientific applications. Nd-142 has been used to produce short-lived Tm and Yb isotopes. Nd-146 has been suggested to produce Pm-147 and Nd-150 has been used to study double beta decay. Due to the several modern applications using nanomaterials, more and more highly rare earth compounds have been demanded. The researches at IPEN uses the experience gained in rare earth separation for the preparation of some pure acetates, purity > 99.9% for application in nanotechnology research. A simple and economical chemical process to obtaining neodymium acetate of high purity is studied. The raw material in the form of mixed rare earths carbonate comes from Brazilian monazite. It is used the technique of strong cationic exchange resin, proper to water treatment, to the neodymium's fractionation and it is achieved a purity of 99.9% in Nd2O3 and yield greater than or equal 80%, with the elution of rare earths by EDTA solution in pH controlled. The complex of EDTA-neodymium is transformed in neodymium oxide, subsequently the oxide is dissolved in acetic acid to obtain the neodymium acetate. The solid salt was characterized via molecular absorption spectrophotometry, mass spectrometry, thermal analysis, chemical analysis and X ray diffraction. In summary the analytical data collected allowed to conclude that the stoichiometric formula for the neodymium acetate prepared is Nd(CH 3COOH)3.1.5H2O.

    Palavras-Chave: acetates; cations; chemical analysis; edta; ion exchange; mass spectroscopy; monazites; nanotechnology; neodymium; spectrophotometry; thermal analysis

  • IPEN-DOC 24189

    SOBRINHO, LUIZA F. ; GARCIA, RAFAEL H.L. ; SILVA, FLAVIA R.O. ; NETO, ALMIR O. ; SAKATA, SOLANGE K. . Characterization of palladium nanoparticles anchored on graphene oxide obtained by electron beam. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Fuel Cells (FCs) are devices that convert chemical energy directly in electrical and thermal energy. There are two disadvantages in the process that difficult the implementation of these new power supply. The fuel, hydrogen, is highly flammable and it is difficult to transport and the catalyst is costly. FCs have been attracting worldwide attention because they are environmental friendly and potential as clean and efficient power source. However, their durability and cost have being identified as important issues in this power supply. The objective of this work is to provide a new material based on incorporation of palladium graphene oxide as catalyst. Graphene Oxide (GO) was synthesized from graphite by the modified Hummers method, in water/alcohol medium. The one-step method to incorporate nanoparticles on this nanomaterial was developed using by electron beam (EB). Additionally, this method also reduces the Graphene Oxide (GO). This nanocomposite were characterized by thermogravimetry (TG), Fourier transform infrared (FT-IR), transmission electron microscopy (TEM), x-rays diffraction (XRD) and its potential for electro catalysis were performed by cyclic voltammetry (CV) and amperometry (CA). The results showed that the incorporation of Pd on reduced GO (rGO) by electron beam was 20-40 % in mass. The process using EB and Pd nanoparticles supported on graphene oxide as a support are an alternative, in substitution of conventional methods to the production of electrodes for fuel cells.

    Palavras-Chave: catalysts; electrodes; electron beams; fourier transformation; fuel cells; graphene; infrared spectra; nanoparticles; palladium; synthesis; thermal gravimetric analysis; transmission electron microscopy

  • IPEN-DOC 24188

    RODRIGUES, ANTONIO C.I. ; MADI FILHO, TUFIC ; SILVA, DAVILSON G. da . Study and project of the new rack with boron for storage of fuel elements burned in the IEA-R1 research reactor. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: The IEA-R1 research reactor works 40h weekly with 4.5 Mw power. The storage rack for spent fuel elements has less than half of its initial capacity. Under these conditions (current conditions of reactor operation 32h weekly will have 3 spend fuel by year, then, approximately 3 utilization rate Positions/year). Thus, we will have only about six years of capacity for storage. Whereas the desired service life of the IEA-R1 is at least another 20 years, it will be necessary to increase the storage capacity of spent fuel. Hence, it is necessary to double the wet storage capacity (storage in the IEA-R1 reactor's pool). After reviewing the literature about materials available for use in the construction of the new storage rack with absorber of neutrons, the BoralcanTM (manufactured by 3TMhis) wwaosr kc hporseesne,n dtsu es ttuod iitess :p r(oap) efrotrie tsh. e construction of new storages racks with double of the current capacity using the same place of current storages racks and (b) criticality analysis using the MCNP-5 code. Two American Nuclear Data Library were used: ENDF / B-VI and ENDF / B-VII, and the results obtained for each data bases were compared. These analyzes confirm the possibility of doubling the storage capacity of fuel elements burned in the same place occupied by the current storage rack attending to the IEA-R1 reactor needs and attending the safety requirements according to the National Nuclear Energy Commission - CNEN and the International Atomic Energy Agency (IAEA). To calculate the keff were considered new fuel elements (maximum possible reactivity) used in full charge of the storage rack. With the results obtained in the simulation we can conclude that doubling the amount of racks for spent fuel elements are complied with safety limits established in the IAEA standards and CNEN of criticality (keff < 0.95).

    Palavras-Chave: boron; comparative evaluations; computerized simulation; criticality; fuel racks; iear-1 reactor; monte carlo method; nuclear data collections; spent fuel elements; spent fuel storage

  • IPEN-DOC 24187

    FONSECA, THAIS N. ; TEIXEIRA, PAULA S. ; MOURA, EDUARDO de ; GERALDO, AUREA B.C. . Study of bixin oxidation by ionizing irradiation. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Brazil is the world's largest producer of anatto, followed by Kenya and Peru. The fruit of the annatto tree is constituted by a capsule containing external spines and internal seeds with reddish coloration, providing a natural pigment which is environmentally efficient, being able to replace synthetic pigments and dyes. The active substance of the pigment is Bixin, which is a type of carotenoid which constitutes a greater percentage of pigment in these seeds and has a lipo soluble character. Bixin reacts with NaOH in a saponification reaction giving norbixin, which is water soluble. It is known that the destination of the dye extracted from the fruit is intended for industry, especially the food industry. The culture of annatto tree brings prospects of development in agricultural programs for medium and small producers, which are able to use decadent areas of other crops. In addition to the food sector, new applications for the pigment helps the development of family farming. The pigment extracted from annatto undergoes a natural oxidation; this work aims to evaluate this phenomenon and also the oxidation of the pigment after the irradiation process. This work also evaluates of the how the oxidation process is affected by irradiation and the modifications introduced to irradiated pigments. Irradiated and nonirradiated samples were characterized by thermogravimetry, UV-vis spectrophotometry and infrared spectroscopy (FTIR). The results are then discussed.

    Palavras-Chave: electron beams; fourier transformation; infrared spectra; ionizing radiations; oxidation; pigments; radiation effects; seeds; thermal gravimetric analysis; ultraviolet spectra; ultraviolet spectrometers

  • IPEN-DOC 24186

    CARDOSO, JESSICA R. ; MOURA, EDUARDO de ; GERALDO, AUREA B.C. . Electron beam irradiation process applied to primary and secondary recycled high density polyethylene. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Plastic bags, packaging and furniture items are examples of plastic utilities always present in life. However, the end-of-life of plastics impacts the environment because of this ubiquity and also often their high degradation time. Recycling processes are important in this scenario because they offer many solutions to this problem. Basically, four ways are known for plastic recycling: primary recycling, which consists in re-extrusion of clean plastic scraps from a production plant; secondary recycling, that uses end-of-life products that generally are reduced in size by extrusion to obtain a more desirable shape for reprocessing (pellets and powder); tertiary recover which is related to thermo-chemical methods to produce fuels and petrochemical feedstock; and quaternary route, that is related to energy recovery and it is done in appropriate reactors. In this work, high density polyethylene (HDPE) was recovered to simulate empirically the primary and secondary recycling ways using materials which ranged from pristine to 20-fold re-extrused materials. The final 20-fold recycled thermoplastic was irradiated in an electron beam accelerator under a dose rate of 22.4 kGy/s and absorbed doses of 50 kGy and 100 kGy. The characterization of HDPE in distinct levels of recovering was performed by infrared spectroscopy (FTIR) and thermogravimetric degradation. In the HDPE recycling, degradation and crosslinking are consecutive processes; degradation is very noticeable in the 20-fold recycled product. Despite this, the 20-fold recycled product presents crosslinking after irradiation process and the post-irradiation product presents similarities in spectroscopic and thermal degradation characteristics of pristine, irradiated HDPE. These results are discussed.

    Palavras-Chave: absorbed radiation doses; cross-linking; dose rates; electron beams; extrusion; fourier transformation; infrared spectra; polypropylene; recycling; shear; thermal degradation

  • IPEN-DOC 24185

    OLIVEIRA, CAMILA B. ; PARRA, DUCLERC F. ; MARCHINI, LEONARDO G. . Influência da irradiação gama no Elastômero Termoplástico (TPE). In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: O TPE é a nomenclatura utilizada para o elastômero termoplástico, que também é conhecido como borracha termoplástica. Ele pertence relativamente a uma classe pouco investigada dos plásticos de engenharia, porém, nos últimos anos constata-se um constante crescimento devido a sua importante e incomum combinação de propriedades. Durante o seu uso, comporta-se como um elastômero, mas, ao contrário dos elastômeros tradicionais (borrachas vulcanizadas), ele pode ser processado através das tecnologias e dos equipamentos convencionais utilizados para termoplásticos, como extrusão e injeção. O processamento de polímeros, como o TPE por meio da radiação se constitui em uma área tecnológica voltada ao estudo dos efeitos físicos e químicos causados pela radiação de alta energia, como a radiação gama. Assim o objetivo deste trabalho é avaliar as propriedades mecânicas e térmicas do TPE irradiado por fonte de 60Co de radiação gama em diferentes doses. O elastômero termoplástico sendo modificado através de radiação ionizante em doses de 5, 10, 20, 30, 50 e 100 kGy avaliam-se os efeitos da radiação nas propriedades mecânicas e térmicas deste material, através dos testes realizados de ensaios de tração, testes de TGA, FTIR e Índice de fluidez.

    Palavras-Chave: cobalt 60; elastomers; fourier transformation; gamma radiation; infrared spectra; mechanical properties; radiation doses; radiation effects; thermal gravimetric analysis; thermodynamic properties; thermoplastics

  • IPEN-DOC 24184

    OLIVEIRA, M.J.A. ; VASQUEZ, P.A.S. ; ALCANTARA, M.T.S. ; MUNHOZ, M.M.L. ; LUGAO, A.B. . Effect of gamma radiation on polyvinylpyrrolidone hydrogels. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Polyvinylpyrrolidone (PVP) hydrogels have been investigated as drug delivery matrices for the treatment of wounds, such as cutaneous leishmaniasis, and matrices with silver nanoparticles for chronic wounds and burns. The preparation of such hydrogels can occur by various cross-linking methods, such as gamma, chemical, physical, among others. The most feasible for wound dressings is gamma irradiation from cobalt-60, because gamma irradiation simultaneously promotes crosslinking and sterilization, leaving the wound dressing ready for use. The objective of this work was to investigate the effect on physico- chemical properties of gamma radiation on PVP hydrogel according to the radiation absorbed dose variation. The PVP hydrogels were irradiated with doses of 5, 15, 25, 35, 45, 55, 65, 75 and 95kGy at dose rate of 5 kGy/h and characterized by swelling, thermogravimetric and mechanical analysis. Results shown a favorable dose range window for processing of these hydrogels related to the application. The results showed that mechanical strength was affected at doses starting at 25 kGy.

    Palavras-Chave: absorbed radiation doses; chemical properties; cobalt 60; differential thermal analysis; dose rates; fourier transformation; gamma radiation; hydrogels; infrared spectra; physical properties; pvp; radiation effects; swelling; tensile properties; thermal gravimetric analysis; wounds

  • IPEN-DOC 24183

    ENOKIHARA, CYRO T. ; SCHULTZ-GUTTLER, RAINER A.; RELA, PAULO R. . Gamma radiation of quartz from Entre Rios (SC) and Quaraí (RS). In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: The availability of gamma ray irradiators in Brazil increased the possibilities of treatments of gemstones for color enhancements. One of the minerals with a very high potential of these treatments is quartz, a very widespread mineral with many colored commercial varieties. A specific variety of quartz showing a green color in nature or induced artificially by radiation gamma (60Co) is quite rare. In Brazil the widely scattered geode occurrences along a 600 km stretch from Quaraí at Brazil southernmost tip to Uberlandia in Minas Gerais is one of these. Quartz from these occurrences have been formed by strong hydrothermal activities. That way much quartz crystals showed a very fast growth history facilitating the formation of growth defects and the uptake of water in form of micro inclusions, molecular water, silanol (Si-OH) and OH. In the present work the material analyzed is from hydrothermal regimes located near the towns Entre Rios (SC) and Quaraí (RS). To characterize these materials analyses have been made by ICP, NAA, electron microscopy, water loss techniques and UV-VIS and NIR-FTIR spectroscopic measurements. Silanol complexes are found, which by radiation due to gamma rays form the color center NBOHC (Non-Bonding Oxygen Hole Center), showing absorption between 590 to 620 nm and leaving a transmission window at about 550nm, responsible for the green color. The spectroscopic water determination showed less molecular water (up to 2300 ppm by weight), probably due to remaining silanol complexes.The water content with up to 3200 ppm by weight exceeds the amount of charge balancing cations (Fe, Al, Li).

    Palavras-Chave: cobalt 60; fourier transformation; gamma radiation; infrared spectra; neutron activation analysis; quartz; ultraviolet radiation

  • IPEN-DOC 24182

    VIEIRA NETO, ANTONIO S. ; GUILHEN, SABINE N. ; RUBIN, GERSON A. ; CALDEIRA FILHO, JOSE S. ; CAMARGO, IARA M.C. . Soft systems methodology as a systemic approach to nuclear safety management. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Safety approach currently adopted by nuclear installations is built almost exclusively upon analytical methodologies based, mainly, on the belief that the properties of a system, such as its safety, are given by its constituent parts. This approach, however, doesn’t properly address the complex dynamic interactions between technical, human and organizational factors occurring within and outside the organization. After the accident at Fukushima Daiichi nuclear power plant in March 2011, experts of the International Atomic Energy Agency (IAEA) recommended a systemic approach as a complementary perspective to nuclear safety. The aim of this paper is to present an overview of the systems thinking approach and its potential use for structuring sociotechnical problems involved in the safety of nuclear installations, highlighting the methodologies related to the soft systems thinking, in particular the Soft Systems Methodology (SSM). The implementation of a systemic approach may thus result in a more holistic picture of the system by the complex dynamic interactions between technical, human and organizational factors.

    Palavras-Chave: human factors; institutional factors; nuclear facilities; personnel management; safety; safety culture; sustainable development

  • IPEN-DOC 24181

    KIBRIT, EDUARDO ; AQUINO, AFONSO R. de . Sustainability management for operating organizations of research reactors. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs. In a country like Brazil, where nuclear activity is geared towards peaceful purposes, any operating organization of research reactor should emphasize its commitment to social, environmental, economic and institutional aspects. Social aspects include research and development, production and supply of radiopharmaceuticals, radiation safety and special training for the nuclear sector. Environmental aspects include control of the surroundings and knowledge directed towards environment preservation. Economic aspects include import substitution and diversification of production. Institutional aspects include technology, innovation and knowledge. These aspects, if considered in the management system of an operating organization of research reactor, will help with its long-term maintenance and success in an increasingly competitive market scenario. About this, we propose a sustainability management system approach for operating organizations of research reactors. A bibliographical review on the theme is made. A methodology for identifying indicators for measuring sustainability in nuclear research reactors processes is also described. Finally, we propose a methodology for sustainability perception assessment to be applied at operating organizations of research reactors.

    Palavras-Chave: management; nuclear facilities; personnel; research reactors; sustainability; sustainable development

  • IPEN-DOC 24180

    TERUI, CLARICE; LIMA, NELSON B. de . Study of tensile test behavior of austenitic stainless steel type 347 seamless thin-walled tubes in coldworked condition. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: These austenitic stainless steel type 347 seamless thin-walled tubes are potential candidates to be used in fuel elements of nuclear power plants (as PWR – Pressurized Water Reactor). So, their metallurgical condition and mechanical properties, as the tensile strength and yield strength, normally are very restrict in demanding project and design requirements. Several full size tensile tests at room temperature and high temperature (315ºC) were performed in these seamless tubes in cold-worked condition. The results of specified tensile and yield strengths were achieved but the elongation of the tube, in the geometry of the component, could not be measured at high temperature due to unconventional mode of rupture (helical mode without separation of parts). The average value of elongation was obtained from stress-strain curves of hot tensile tests and was around 5%. The results obtained in this research show that this behavior of the full size tensile test samples of thin-walled tube (wall thickness less than 0.5 mm) in high temperature (315ºC) is due to the combination of the manufacturing process, the material (crystallographic structure and chemical composition) and the final geometry of the component. In other words, the strong crystallographic texture of material induced by tube drawing process in addition with the geometry of the component are responsible for the behavior in hot uniaxial tensile tests.

    Palavras-Chave: crystal structure; elongation; microstructure; stainless steel-347; temperature range 0400-1000 k; tensile properties; tubes; yield strength

  • IPEN-DOC 24179

    TEIXEIRA, PAULA S. ; FONSECA, THAIS N. ; MOURA, EDUARDO de ; GERALDO, AUREA B.C. . Irradiação da biomassa lignocelulósica de sementes de urucum (Bixa orellana L.) para aplicações em compósitos poliméricos. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: O estudo de compósitos poliméricos reforçados com fibras vegetais tem se tornado popular nas últimas décadas já que este tipo de material possibilita a redução tanto do rejeito de biomassa como o custo final do produto polimérico. Fibras vegetais existem em grande quantidade, são de baixo custo e conjugam biodegradabilidade e renovação. Além disso compósitos de polímero-celulose são mais resistentes à flexão e ao impacto que o mesmo material exclusivamente feito em polímero. Especificamente a celulose contida nas sementes de urucum está presente em uma concentração em torno de 40-45 %, o qual torna-se importante para o uso industrial. Neste trabalho, o bagaço das sementes de urucum após a remoção do seu pigmento avermelhado foi usado para obter compósitos de polietileno de alta densidade (PEAD). O material original foi usado sem e com um prétratamento que removeu componentes como o resíduo do pigmento remanescente, açúcares, proteínas e ácidos graxos. As fibras remanescentes foram secas, fragmentadas e submetidas à irradiação por feixe de elétrons nas doses de 10 kGy, 25 kGy, 50 kGy e 75 kGy para verificar o efeito da radiação na estrutura da celulose e seu subsequente efeito na matriz polimérica.

    Palavras-Chave: bagasse; biomass; cellulose; composite materials; electron beams; fibers; fourier transformation; infrared spectra; irradiation; polyethylenes; radiation effects; reinforced materials; seeds; thermal gravimetric analysis

  • IPEN-DOC 24178

    BARABAS, ROBERTA de C. ; SABUNDJIAN, GAIANE . Neuroscience applied to nuclear energy teaching. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Science and technology play a key role in helping countries increase the quality of life of their inhabitants. The development of peaceful nuclear applications offers important contribution for several fields. However, nuclear accidents are reported as factors that lead to the formation of prejudiced beliefs and attitudes against nuclear technology. The media also influence on what people believe about it. Holding prejudice against nuclear technology will lead to misconceptions and interfere with authorities’ decision on the development of new technology. There are evidences in the literature that implicit prejudices might be avoidable, reduced and even reversed. Interest in prejudice and stereotyping is currently shared by emerging disciplines such as neuroscience. The field of educational neuroscience has developed several types of implicit association tests aiming to assess implicit prejudices that individuals are consciously unaware. As far as prejudices are reported in the nuclear energy education scenario implicit measurement techniques can be an effective tool to identify and measure prejudices against nuclear technology. The Implicit Association Test (IAT) is a valuable tool used worldwide as a measurement technique to assess implicit attitude toward discriminatory behaviors. This study aims to demonstrate the design and development of a neuroscience-based methodology, which will include a future administration of the IAT to school teachers to assess their implicit associations regarding nuclear energy. The procedure will contribute for understanding implicit prejudices interfering with teaching practices. Teaching a balanced view about the applications of the nuclear technology will contribute for the acceptance of nuclear technology.

    Palavras-Chave: education; f codes; learning; neurology; nuclear energy; public opinion; research programs; testing

  • IPEN-DOC 24177

    PEREIRA, LUIZ A.T. ; ROSSI, JESUALDO L. . The recycling through melting machining chips, preliminary results. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: PWR (Pressurized Water Reactor) reactors employ as nuclear fuel UO2 pellets packed in zirconium alloy tubes, called cladding. In the manufacture of the tubes, machining chips are generated which cannot be discarded, since the recycling of this material is strategic in terms of nuclear technology, legislation, economics and the environment. These nuclear alloys are very expensive and are not produced in Brazil and are imported for the manufacture of nuclear fuel. In this work, it will examined methods not yet studied to recycle Zircaloy chips using electron beam furnace in order to obtain ingots. In addition, it is intended to carry out the melting of new Zircaloy alloys, from the melting of zirconium sponge obtained in IPEN and imported and Zircaloy bars. The mechanical properties and the present phases of the material should be determined, as well as, the characterization of the microstructures by optical microscopy. This work, therefore, aims at the creation of a new line of research where methods will be approached to recycle the Zircaloy chips and to reduce in 30 times the volume by means of melting the enormous amount of material stored in the form of machining chips, being able to do others components for nuclear or chemical industry use, as well as conducting basic development research.

    Palavras-Chave: deformation; electron beam furnaces; mechanical properties; melting; microstructure; optical microscopy; recycling; zircaloy 4; zirconium alloys

  • IPEN-DOC 24176

    LOPES, DANIEL R.P. ; OLIVEIRA, OTAVIO L. de ; ROCHA, MARCELO da S. . Estudo da aplicação de nanofluidos de SiO2 e TiO2 em transformadores elétricos a óleo para análise de desempenho da condutividade térmica e rigidez dielétrica. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Os transformadores elétricos são equipamentos essenciais na distribuição de energia elétrica, pois são utilizados para o fornecimento contínuo eletricidade. Por este motivo é importante estudar as possibilidades de melhorar seus sistemas de isolamento e refrigeração. A aplicação de nanofluidos em óleos minerais isolantes, que possuem função de resfriamento e isolamento elétrico, é uma questão relevante nesta área. Neste trabalho, são comparadas as características do óleo mineral base utilizado em transformadores elétricos com amostras coloidais (nanofluidos) feitas com o mesmo óleo base utilizando-se diferentes concentrações de nanopartículas de SiO2 e TiO2. As características de condutividade térmica e resistência dielétrica do nanofluido dependem das concentrações de nanopartículas, porém o fluido deve manter todas as características de isolamento a serem usadas em transformadores elétricos. A análise será realizada através de simulações computacionais usando o software FEMM 2D, aplicando seu módulo de condutividade térmica. Os dados de entrada foram retirados da caracterização de amostras produzidas com diferentes concentrações de nanopartículas de SiO2 e TiO2 (usando o mesmo óleo mineral base). Os parâmetros foram aplicados em um modelo computacional de um transformador de 50 kVA, com geometria usual e circulação natural de óleo (por convecção) referenciando transformadores elétricos utilizados no mercado para a conversão de energia. Este artigo apresenta alguns dos resultados de um estudo das propriedades dielétricas e da condutividade térmica de um nanofluido a base de óleo mineral.

    Palavras-Chave: computerized simulation; dielectric properties; f codes; lubricants; nanofluids; nanoparticles; silicon oxides; thermal conductivity; titanium oxides; transformers; viscosity

  • IPEN-DOC 24175

    SOARES, JAQUELINE J.S. ; JACOVONE, RAYNARA M.S. ; SANTOS, PAULO S. ; ZAIM, MARCIO H.; FARIA, DALVA L.A. de; SAKATA, SOLANGE K. . The effect of gamma radiation on the structure of graphene oxide and graphene oxide functionalized with amino-PEG. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: The functionalization of graphene oxide (GO) with polyethylene glycol (PEG) has been widely used in drug delivery systems. This nanocomposite exhibits excellent stability in the presence of high concentrations of salts and proteins and shows to be less toxic than its raw form in vitro and in vivo. However, it must be sterilized before use in the medical field and the gamma irradiation shows a promising option for this purpose. Sterilization by ionizing energy through gamma rays, generated by Cobalt-60 self-disintegration, consists in exposing the materials to short electromagnetic waves. The irradiation process provides substantial advantages when compared to thermal and chemical processes such as more precise control of the process, production of products with superior qualities, lower energy consumption and less environmental pollution. In this work the effect of gamma radiation on the structure of GO and GO functionalized com Amino-PEG (GO-PEG-NH2) irradiated with different doses (15, 25, 35 and 50 kGy) and rate dose 7.31 kGy.h-1 was evaluated. The analyses were performed by Fourier-transform infrared spectroscopy (FT-IR) and Raman spectroscopy. The results showed that the methods for the synthesis of GO and GO-PEG-NH2 was effective since there was confirmation of the surface oxidation of materials and functionalization with the PEG-NH2 and the sterilization by gamma radiation does not caused any defects on materials.

    Palavras-Chave: cobalt 60; dose rates; fourier transformation; gamma radiation; graphene; infrared spectra; polyethylene glycols; radiation doses; radiation effects; raman spectroscopy; sterilization; synthesis

  • IPEN-DOC 24174

    ICHIKAWA, RODRIGO U. ; LINHARES, HORACIO M.S.M.D.; SILVA, ANDRE S.B. da ; TEIXEIRA, MARIA I. ; RANIERI, IZILDA M. ; TURRILLAS, XAVIER; MARTINEZ, LUIS G. . X-ray diffraction analysis of KY3F10 nanoparticles doped with Nd and preliminary studies for its use in high-dose radiation dosimetry. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: In this work, the structure and microstructure of Nd:KY3F10 nanoparticles was probed using X-ray synchrotron diffraction analysis. Rietveld refinement was applied to obtain cell parameters, atomic positions and atomic displacement factors to be compared with the ones found in literature. X-ray line profile methods were applied to determine mean crystallite size and crystallite size distribution. Thermoluminescent (TL) emission curves were measured for different radiation doses, from 0.10kGy up to 10.0kGy. Dose-response curves were obtained by area integration beneath the peaks from TL. The reproducibility of the results in this work has shown that this material can be considered a good dosimetric material.

    Palavras-Chave: critical size; doped materials; dose-response relationships; dosimetry; nanoparticles; neodymium; radiation doses; thermoluminescence; x-ray diffraction; yttrium fluorides

  • IPEN-DOC 24173

    GONZALEZ, ANDREZA A.D.C.C. ; ROSTELATO, MARIA E.C.M. ; SOUZA, CARLA D. ; RODRIGUES, BRUNA T. ; SOUZA, DAIANE C.B. ; ZEITUNI, CARLOS A. ; NOGUEIRA, BEATRIZ R. . Coatings of nanoparticles applied to brachytherapy treatments. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Palavras-Chave: brachytherapy; coatings; gold; gum acacia; light scattering; nanoparticles; polyethylene glycols; radiation source implants; synthesis; transmission electron microscopy

  • IPEN-DOC 24172

    DARIN, GASPAR ; IMAKUMA, KENGO ; MARTINEZ, LUIS G. ; TURRILAS, XABIER M.; ICHIKAWA, RODRIGO U. ; SILVA, ANDRE S.B. ; DURAZZO, MICHELANGELO ; RIELLA, HUMBERTO G. ; URANO, ELITA . Structural and microstructural analysis of the U-GD-O system using X-ray diffraction data. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Gadolinium is one of the best neutron absorber materials and its usage can be considered as a burnable poison for Light Water Reactors (LWR) and as a sacrificial material in Sodium Fast Reactor (SFR). Most of the experiments in the literature focus on nuclear fuel with up to 12 wt% Gd2O3. Recently, the phase diagram and melting point has been investigated for high contents of Gd2O3 in the U-Gd-O system, that means a solid solution of the composition (U1-x, Gdx)O2 for 0<x<100%. In this work, we present the analysis of the U-Gd-O system for high contents of Gd2O3 using X-ray diffraction data. Rietveld analysis was applied to obtain cell parameters, atomic positions and atomic displacement factors and compared with literature avaliable. Also, the quantification of phases was performed for the different contents of Gd2O3 in the system. Finally, mean crystallite sizes were determined and correlated with the weight fraction of the phases.

    Palavras-Chave: atomic displacements; burnable poisons; critical size; gadolinium oxides; microstructure; mixtures; phase diagrams; uranium; x-ray diffraction

  • IPEN-DOC 24171

    SILVA, RUBENS C. da; BITELLI, ULYSSES D. ; MURA, LUIZ E.C. . Experimental estimation of moderator temperature coefficient of reactivity of the IPEN/MB-01 research reactor. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Palavras-Chave: cross sections; experimental data; heavy water; ipen-mb-1 reactor; moderators; reactivity; reactor cores; reactor safety; reactor stability; temperature coefficient

  • IPEN-DOC 24170

    LOBO, RAQUEL M. ; ANDRADE, ARNALDO H.P. ; MORCELLI, APARECIDO E.. Small specimen technique for assessing the mechanical properties of metallic components. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Palavras-Chave: accuracy; computerized simulation; cracks; finite element method; irradiation; materials testing; mechanical properties; miniaturization; stainless steel-410

  • IPEN-DOC 24169

    SOMESSARI, SAMIR L. ; MOURA, JOAO A. ; CALVO, WILSON A.P. . Development of an automated system for the operation of an electrom beam acellerator. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Electron beam accelerators are used in many applications, such as basic physical research, chemistry, medicine, molecular biology, microelectronics, agriculture and industry, among others. The majority of the accelerators have electrons from a hot tungsten filament and their energy is increased as it passes through an electric field in the vacuum chamber. For industrial purposes, the most common model is Dynamitrons®. At IPEN-CNEN/SP, there is an electron beam accelerator Dynamitron® Type (Manufactured by RDI- Radiation Dynamics Inc., 1978) model DC1500/25/4. The technology applied was available in the 60´s and 70´s, but, nowadays is obsolete. Moreover, there are not original spare parts for this equipment any longer. The aim of this work is to develop a nationalized automated operation system for the accelerator, to replace the old equipment.

    Palavras-Chave: accelerator facilities; accelerators; automation; control systems; electron beams; sweep circuits; beams; brazilian cnen

  • IPEN-DOC 24168

    SANTOS, PAULO de S. ; VASQUEZ, PABLO A.S. . C-188 CO-60 sources installation and source rack loading optimization processes in a gamma irradiation facility. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Since 2004, the Multipurpose Gamma Facility at the Nuclear and Energy Research Institute has been providing services on radiation processing for disinfection and sterilization of health care and disposable medical products as well to support research studies on modification of physical, chemical and biological properties of several materials. Recently, there was an increment in irradiation of the Cultural Heritages. This facility uses C-188 double-encapsulated radioactive Cobalt-60 sources kwon as pencils from manufactures outside of country. The activity of the cobalt sources decays into a stable nickel isotope with a half-life around 5.27 years, which means a loss of 12.3% annually. Then, additional pencils of Cobalt-60 are added periodically to the source rack to maintain the required capacity or installed activity of the facility. The manufacturer makes shipping of the radioactive sources inside a high density container type B(U) , by sea. This one involves many administrative, transport and radiation safety procedures. Once in the facility, the container is opened inside a deep pool water to remove the pencils. The required source geometry of the facility is obtained by loading these source pencils into predetermined diagram or positions in source modules and distributing these modules over the source rack of the facility. The dose variation can be reduced placing the higher activity source pencils near the periphery of the source rack. In this work are presented the procedures for perform the boiling leaching tests applied to the container, the Cobalt-60 sources installation, the loading processes and the source rack loading optimization.

    Palavras-Chave: cobalt 60; gamma radiation; leaching; loading; nuclear materials management; radiation sources; sealed sources; security

  • IPEN-DOC 24167

    VIEIRA, IMARIO ; NASCIMENTO, FERNANDO C.; CALVO, WILSON A.P. . Strategic planning as a competitive differential: A case study of the Sealed Sources Production Laboratory. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Strategic planning has always been and continues to be one of the most important management tools for decision making. Amidst the uncertainties of the 21st century, public, private and third sector organizations are steadily struggling to improve their strategic plans by using more effective results management tools such as BSC-Balanced Scorecard. Nuclear research institutes and research centers around the world have been using more and more these types of tools in their strategic planning and management. The objective of this article was to recommend the use the BSC as a strategic tool for decision making for the Sealed Sources Production Laboratory located in the Radiation Technology Center, at Nuclear and Energy Research Institute (IPEN/CNEN-SP), in São Paulo, Brazil. The methodology used in this academic article was a case study, which considered the object of the study, the Sealed Sources Production Laboratory, from January 2014 to August 2016. Among the main results obtained with this study can be cited: the improvement of the information flow, the visualization and proposition to change the periodicity of analysis of the results, among others. In view of the expected results, it was possible to conclude that this study may be of value to the Sealed Sources Production Laboratory for Industrial Radiography and Industrial Process Control and also to other research centers, as it will allow and contribute with an additional management support tool.

    Palavras-Chave: decision making; sealed sources; production; planning; program management; performance; brazilian cnen; radiation sources

  • IPEN-DOC 24166

    NOGUEIRA, ALESSANDRO F.; SAMAD, RICARDO E. ; VIEIRA JUNIOR, NILSON D. ; ROSSI, WAGNER de . Study of ablation on surfaces of nuclear-use metals irradiated with femtosecond laser. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: The use of ultrashort pulsed lasers is an alternative for micro-machining in metal surfaces, with diverse applications in several industrial areas, such as aeronautics, aerospace, naval, nuclear, among others, where there is a growing concern with reliability in service. In this work, micro-machining were performed on titanium surfaces using femtosecond ultrashort pulses. Such a process resulted in minimal heat transfer to the material, thus avoiding and surface deformation of the titanium plate and the formation of resolidified material in the ablated region, which are drawbacks present in the use of the long pulsed keyed laser of the order of nanoseconds. Three types of micro-machining were performed, with variations in the distances between the machined lines. It was also verified that the wettability increases when there is an increase in the distance between machined lines. Finally, in order to change the surface with minimal removal of material, it has been found that the use of ultra-short pulse lasers provide great benefits for the integrity of the ablated material. This initial study is the starting point for the study of other metals, such as Maraging Steels and Zircaloy that will be the target of future work.

    Palavras-Chave: ablation; laser radiation; machining; pulsed irradiation; pulses; titanium; wettability

  • IPEN-DOC 24165

    BARROSO, ALINE G. ; GARCIA, RAFAEL H.L. ; DEL MASTRO, NELIDA L. . X-ray diffraction pattern and relative crystallinity of irradiated arrowroot starch. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: After cereals, tubers and roots are the major source of starch for food and industrial uses. Arrowroot refers to any plant of the genus Marantha, but the term is most commonly used to describe the easily digested starch obtained from the rhizomes of Marantha arundinacae. The rhizomes of this herbaceous plant contain about 20% of starch. As few studies exist on arrowroot starch, the objective of this preliminary work was to study the X-ray diffraction patterns (XRD) patterns of arrowroot starch when treated by γ-radiation with doses up to 15 kGy in a 60Co source. The XRD patterns of the arrowroot starch exhibited A-type crystalline arrangements with strong peaks at approximately 15º, 17º, 18º and 23º (2θ). A slight increase of diffractogram peaks intensity was noticed after the irradiation process. The cristallinity index was calculated using Bruker DIFFRAC.EVA version 4.2 software. Relative crystallinity seems to increase with radiation doses, and this effect is more noticeable at low doses. That can be attributed to different radiation sensitivity among the amorphous and crystalline regions of the arrowroot starch molecule. Present results will contribute to elucidate the behavior under radiation treatment of this starchy component increasingly employed by the food industry.

    Palavras-Chave: cobalt 60; crystal structure; gamma radiation; irradiation; peaks; radiation doses; radiation effects; roots; starch

  • IPEN-DOC 24164

    OLIVEIRA, JULIANA de A.S. ; SILVA, PAULO S.C. da . Use of macrophites for removal of Co e Zn in liquid effluents. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: This study proposes the application of Eichhornia crassipes roots biomass to remove cobalt and zinc ions from solution, aiming its application to effluent treatment. The efficiency of adsorption and the percent of removal were checked as a function of pH and contact time. The plants, for biomass production, were collected at the Billings reservoir in São Bernardo do Campo, located in the Southeast of São Paulo Metropolitan Region. The biomass obtained was subjected to the chemical activation process by the treatment with HCl 0.1 molL-1 in order to increase its surface area. The concentrations of cobalt and zinc, present in the adsorbent, before and after the adsorption experiments were determined by the instrumental neutron activation analysis (INAA) technique. Results showed that the pH of the solution must be adjusted after the addition of the biomass. The contact time for maximum removal of both ions is between 20 and 30 min.

    Palavras-Chave: adsorption; aqueous solutions; biomass; cobalt ions; concentration ratio; liquid wastes; neutron activation analysis; ph value; removal; zinc ions

  • IPEN-DOC 24163

    MESQUITA, CARLOS H. de ; CALVO, WILSON A.P. ; AOKI, PEDRO E. ; SILVA, VALDIR C. da ; HARAGUCHI, MARCIO I. ; VELO, ALEXANDRE F. ; ALVAREZ, ALEXANDRE G. ; PAIXAO, LETICIA B.; HAMADA, MARGARIDA M. . Gallium-67 citrate used as a tracer of acetone production routes. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: In this work the pathway of the chemical product and the kinetics parameters were evaluated in a laboratory plant settled, using 40 GBq of 67Ga citrate as radiotracer and 18 NaI(Tl) radiation detectors. The AnaComp program was used to estimate the kinetic parameters of the acetone production. The yield of the acetone production was estimated by the percentage ratio between the areas under the curve (AUC) of the curve profiles of the final product compartment divided by the concentration found inside the chemical reactor whose result was 87% yield during the first 30 minutes of reaction.

    Palavras-Chave: gallium 67; tracer techniques; acetone; calibration; citrates; kinetics; multi-channel analyzers; radioactivity; nai detectors

  • IPEN-DOC 24162

    PEREZ, CAROLINE ; SANTOS, ELIANE C. ; SAIKI, MITIKO . Establishing adequate conditions for mercury determination in environmental samples by INAA. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Palavras-Chave: ecological concentration; gamma radiation; high-purity ge detectors; irradiation; mercury 197; mercury 203; neutron activation analysis

  • IPEN-DOC 24161

    PRADO, E.S.P. ; DELLAMANO, J.C. ; CARNEIRO, A.L.G. ; SANTOS, R.C. ; PETRACONI, G.; POTIENS JUNIOR, A.J. . Technical feasibility study on volumetric reduction of radioactive wastes using plasma technology. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: The radioactive waste arising from nuclear reactors, hospitals, industry and research institutes are generated daily with a considerable amount. To final dispose of these radioactive waste safely and cost effectively, they must be transformed into physical and chemical compounds suitable for radionuclides immobilization with maximum volume and exhaust gaseous reduction. In this scope, among the promising technologies for the radioactive waste treatment, plasma technology allows reducing substantially the waste volume after exposing them to temperatures above 2,500ºC. In the planning and management of radioactive waste, the challenges related to plasma technology are presented as a motivation factor for the possible implantation of plasma reactors in nuclear plants and research centers aiming at improving the process of radioactive waste management.

    Palavras-Chave: decomposition; feasibility studies; gasification; plasma; radioactive waste storage; reduction; slags; volume

  • IPEN-DOC 24160

    FRANCO, JOSE G. ; FRANCO, SUELY S.H. ; FRANCO, CAIO H.; ARTHUR, VALTER ; ARTHUR, PAULA B. ; VILLAVICENCIO, ANNA L.C. . Low doses of gamma radiation in soybean. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: The degree of radiosensitivity depends mostly on the species, the stage of the embryo at irradiation, the doses employed and the criteria used to measure the effect. One of the most common criteria to evaluate radiosensitivity in seeds is to measure the average plant production. Dry soya seeds were exposed to low doses of gamma radiation from source of Cobalt-60, type Gammecell-220, at 0.210 kGy dose rate. In order to study stimulation effects of radiation on germination, plant growth and production. A treatment with four radiation doses was applied as follows: 0 (control); 12.5; 25.0 and 50.0 Gy. Seed germination and harvested of number of seeds and total production were assessed to identify occurrence of stimulation. Soya seeds number and plants were handled as for usual seed production in Brazil. The low doses of gamma radiation in the seeds that stimulate the production were the doses of 12.5 and 50.0 Gy. The results show that the use of low doses of gamma radiation can stimulate germination and plant production.

    Palavras-Chave: cobalt 60; gamma radiation; germination; harvesting; low dose irradiation; radiation doses; radiation effects; radiosensitivity; soybeans

  • IPEN-DOC 24159

    SMITH, RICARDO B. ; VICENTE, ROBERTO . 30 years of the Goiania accident: a comparative study with other radioactivity dispersion events. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: The year 2017 marks 30 years since the radioactive accident that occurred in the city of Goiania, capital of the state of Goias. It was the largest radiological accident in Brazil, and one of the largest in the world occurring outside nuclear facilities. Regarding the accidents at nuclear power plants, two of the biggest were Chernobyl in Ukraine, a year and a half before Goiania, and the Fukushima accident in Japan, in 2011. Different amounts of radioactive material were dispersed in the environment in each of these events. However, each one’s main pathway of dispersion was different: the accident of Goiania was terrestrial, Chernobyl was at the atmosphere, and Fukushima was mainly in the ocean. This work aims to study these different amounts, comparing such activities. In addition, it proposes to compare the sea dispersion of Fukushima with the amount of radioactive waste dumped in the oceans, when the release of radioactive waste at sea was permitted. It also proposes to compare the Chernobyl aerial dispersion with the radioactive material dissipated in the atmosphere, resulting from the more than 500 atmospheric nuclear tests conducted between 1945 and 1962 by the United States, the former Soviet Union, England, France and China.

    Palavras-Chave: atmospheres; cesium 137; chernobylsk-4 reactor; comparative evaluations; contamination; dispersions; environmental impacts; fukushima daiichi nuclear power station; radiation accidents; radioactive materials; radioactive waste disposal; radioactive wastes; reactor accidents; seas; soils

  • IPEN-DOC 24158

    HIROMOTO, GORO ; DELLAMANO, JOSE C. . Radioactive decay pattern of actinides present in waste from Mo-99 production. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Brazil is currently planning to produce 99Mo from fission of LEU targets to meet the present national demand of 99m Tc. The 99Mo activity planned at the end of irradiation is 5000 Ci (185 TBq) per weekly cycle, in order to meet the present demand of 1000 Ci (37 TBq) per week, after target cooling and processing. To predict the activities that will be handled in the waste treatment facility, the computational code SCALE 6.0 was used to simulate the irradiation of the uranium targets and the decay of radioactive products. This study presents the findings of this research, mainly focused on the actinides activity that will be present in the waste and the respective radioactive decay pattern over a period of one hundred thousand years.

    Palavras-Chave: actinides; computerized simulation; daughter products; irradiation; molybdenum 99; radioactive wastes; radioactivity; s codes; uranium 235 target

  • IPEN-DOC 24157

    COSTA, PRISCILA ; COSTA, FABIO E. ; RAELE, MARCUS P. ; ZAHN, GUILHERME S. ; GERALDO, BIANCA ; VIEIRA JUNIOR, NILSON D. ; SAMAD, RICARDO E. ; GENEZINI, FREDERICO A. . Eletronic response of a photodiode coupled to a boron thin film. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: A portable thermal neutron detector is proposed in this work using a silicon photodiode coupled to a boron thin film. The aim of this work was to verify the effect in the electronic response of this specific photodiode due to boron deposition, since the direct deposition of boron in the semiconductor surface could affect its electrical properties specifically the p-type layer that affects directly the depletion region of the semiconductor reducing the neutron detector efficiency count. Three boron depositions with different thickness were performed in the photodiode (S3590-09) surface by pulsed laser deposition and the photodiode was characterized, before and after the deposition process, using a radioactive americium source. Energy spectra were used to verify the electronic response of the photodiode, due to the fact that it is possible to relate it to the photopeak pulse height and resolution. Spectra from the photodiode without and with boron film deposition were compared and a standard photodiode (S3590-04) that had the electronic signal conserved was used as reference to the pulse height for electronics adjustments. The photopeak energy resolution for the photodiode without boron layer was 10.26%. For the photodiode with boron deposition at different thicknesses, the resolution was: 7.64 % (0.14 μm), 7.30 % (0.44 μm) and 6.80 % (0.63 μm). From these results it is possible to evaluate that there was not any degradation in the silicon photodiode.

    Palavras-Chave: americium 241; boron; electrical properties; energy spectra; brazilian cnen; neutron detectors; photodiodes; portable equipment; thermal neutrons; thin films

  • IPEN-DOC 24156

    THOMAZI, GABRIELA O.C. ; COSTA, ANDREA da; RODRIGUES, JAQUELINE P.; ALVES, GLAUCIE J. ; TURIBIO, THOMPSON de O. ; ROCHA, ANDRE M. ; AIRES, RAQUEL da S. ; JACOME, LARISSA B.S. ; SEIBERT, CARLA S.; SPENCER, PATRICK J. ; GALISTEO JUNIOR, ANDRES J.; ANDRADE JUNIOR, HEITOR F. de. Previous 60-CO radiation from Paratrygon aiereba mucus induces the production of highly responsive antibodies and a better immune response in mice. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Wounds from stinging freshwater stingrays are painful, difficult to heal and cause extensive necrosis and systemic phenomena. The treatment is symptomatic, of low efficiency and there is no therapy, which causes more suffering to the injured. This study aimed to evaluate the immune response induced by the native or irradiated by 60-Co gamma from Paratrygon aiereba mucus. IPEN’s Committee on Ethics in the Use of Animals (n.º126/2013) and lanes captured under license from the Chico Mendes Institute for Biodiversity Conservation (n.º6781-1/2014) approved this research. For the assays, sera from Swiss mice previously immunized against native or irradiated mucus were used. The proliferation of splenic B cells in response to mucus was evaluated by the In Vitro Induced Antibody Production method and serum and splenic cytokines were also quantified. Our data demonstrate that the irradiated mucus of P. aiereba induces greater production of antibodies and more immunological memory in the mice. Spleen cells from animals immunized against irradiated mucus produced IFN-γ, TNF-α and IL-10, and serum TNF-α (immunized group against irradiated mucus) and IL-6 and IL-17 (immunized group against native mucus). The results corroborate the use of ionizing radiation, with production of highly responsive antibodies and better immune response, besides proving that Paratrygon aiereba mucus is capable of stimulating cellular and humoral adaptive immune response, contributing to the continuity of associated investigations.

    Palavras-Chave: antibodies; cobalt 60; fishes; immune serums; immunity; ionizing radiations; lymphokines; mice; spleen cells; venoms; wounds

  • IPEN-DOC 24155

    PEREIRA, KAROLINE P. ; MARTINS, ELAINE A.J. ; COTRIM, MARYCEL E.B. ; PIRES, MARIA A.F. . Evaluation of PAHs in groundwater and surface waters at multipurpose reactor installation area. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Brazil has four research reactors in operation, all old and low power. The IEA-R1 reactor of IPEN/CNEN-SP has only limited radioisotope production capacity, materials irradiation, and neutron beam utilization. This reactor has been operating for fifty-nine years and has prospects of operation for a maximum period of ten years. It is necessary to implement a new reactor, which will support nuclear activities, and the national strategic objectives related to technological development in the areas of energy and defense; scientific and technological development; training of human resources and the growing production of radioisotopes for medical application. The Brazilian Multipurpose Reactor (RMB) will be a nuclear reactor for research and will be built in the state of São Paulo, in the municipality of Iperó. Its construction may involve the release of effluents into the environment. With monitoring before, during and after construction, it will be possible to verify if the construction itself will harm the environment. Several organics compounds are released daily in water bodies collaborating for environmental imbalance. Many of them have carcinogenic and mutagenic properties, receiving more attention by the scientific community. Most of the organic compounds are not included in environmental legislation and many of them present high toxicity, especially those classified as endocrine disrupters, as some Polycyclic Aromatic Hydrocarbons (PAHs). Only seven of the thirteen PAHs studied in this project are contemplated in Brazilian legislation, and just one is contained in international legislation. The PAHs studied in this work present, considered hazardous chemical compounds due to their toxicity, persistence in the environment, their bioaccumulative potential and their tendency to biomagnify. For the determination of the PAHs, the samples were concentrated by solid phase extraction (SPE) followed by quantification by High Performance Liquid Chromatography (HPLC). It was possible verify values of some PAHs below threshold limit 0.05 μg L-1 in the water bodies that cross the RMB area.

    Palavras-Chave: biological accumulation; concentration ratio; construction; environmental impacts; ground water; high-performance liquid chromatography; particulates; polycyclic aromatic hydrocarbons; radioactive effluents; research reactors; surface waters; toxicity

  • IPEN-DOC 24154

    TORRECILHA, JEFFERSON K. ; SILVA, PAULO S.C. . Bentonite maturation with “Águas de Lindóia” water (SP). In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: This study aims to characterize the artificial peloid obtained by maturing bentonite with Águas de Lindóia water for periods of three, six and nine months. The pH, moisture, organic matter content, loss on ignition and swelling power of matured and non-matured samples were measured for physicochemical characterization. The elemental concentration was determined by instrumental neutron activation analysis. Results showed that water adsorption capacity, organic matter and swelling power is related to the maturation time and no significant differences occurs in the elemental concentration except for Na.

    Palavras-Chave: adsorption; bentonite; concentration ratio; elements; irradiation; maturation; mineral springs; moisture; neutron activation analysis; neutron flux; organic matter; ph value; sediments; swelling

  • IPEN-DOC 24153

    CAMPOS, A.M. ; BARBEZAN, A.B. ; VILLAVICENCIO, A.L.C.H. . Information on the presence of 2- Alkylcyclobutanones in animal feed after ionizing radiation treatment. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: In agribusiness, it is related to the development of the activities of creation, production and commercialization of pets in the Pet segment. This market grew 7.6% between 2014/2015, generated R$ 18 million in Brazil and 67.3% of this value refers to products for animal feed, commonly called pet food. In animal feed, the raw materials are chosen according to the method (s) of processing (s) in which the product is submitted, its stability in the process and its nutritional source during the validity of the product. In food preservation, the irradiation process is a treatment that seeks to reduce the microbial load of foods, however, it can also alter the composition of the present ingredients and form radiolytic products in the formulation that are still under study. In products containing the presence of fat, the main concern is 2-Alkylciclobutanones (2-ACBs), which are radiolytic products formed exclusively post-processing with ionizing radiation. The formation of 2-ACBs is directly related to the lipid concentration and the dose of irradiation. The objective of this work is to describe the possible radiolytic by-products formed in canine rations containing extruded fat after irradiation and to determine if the formation of 2-ACBs depends on the increase of the radiation dose and, as a consequence, verify their cytotoxicity and genotoxicity.

    Palavras-Chave: animal feeds; carboxylic acids; fats; food processing; irradiation; mycotoxins; quality control

A pesquisa no RD utiliza os recursos de busca da maioria das bases de dados. No entanto algumas dicas podem auxiliar para obter um resultado mais pertinente.

É possível efetuar a busca de um autor ou um termo em todo o RD, por meio do Buscar no Repositório , isto é, o termo solicitado será localizado em qualquer campo do RD. No entanto esse tipo de pesquisa não é recomendada a não ser que se deseje um resultado amplo e generalizado.

A pesquisa apresentará melhor resultado selecionando um dos filtros disponíveis em Navegar

Os filtros disponíveis em Navegar tais como: Coleções, Ano de publicação, Títulos, Assuntos, Autores, Revista, Tipo de publicação são autoexplicativos. O filtro, Autores IPEN apresenta uma relação com os autores vinculados ao IPEN; o ID Autor IPEN diz respeito ao número único de identificação de cada autor constante no RD e sob o qual estão agrupados todos os seus trabalhos independente das variáveis do seu nome; Tipo de acesso diz respeito à acessibilidade do documento, isto é , sujeito as leis de direitos autorais, ID RT apresenta a relação dos relatórios técnicos, restritos para consulta das comunidades indicadas.

A opção Busca avançada utiliza os conectores da lógica boleana, é o melhor recurso para combinar chaves de busca e obter documentos relevantes à sua pesquisa, utilize os filtros apresentados na caixa de seleção para refinar o resultado de busca. Pode-se adicionar vários filtros a uma mesma busca.

Exemplo:

Buscar os artigos apresentados em um evento internacional de 2015, sobre loss of coolant, do autor Maprelian.

Autor: Maprelian

Título: loss of coolant

Tipo de publicação: Texto completo de evento

Ano de publicação: 2015

Para indexação dos documentos é utilizado o Thesaurus do INIS, especializado na área nuclear e utilizado em todos os países membros da International Atomic Energy Agency – IAEA , por esse motivo, utilize os termos de busca de assunto em inglês; isto não exclui a busca livre por palavras, apenas o resultado pode não ser tão relevante ou pertinente.

95% do RD apresenta o texto completo do documento com livre acesso, para aqueles que apresentam o significa que e o documento está sujeito as leis de direitos autorais, solicita-se nesses casos contatar a Biblioteca do IPEN, bibl@ipen.br .

Ao efetuar a busca por um autor o RD apresentará uma relação de todos os trabalhos depositados no RD. No lado direito da tela são apresentados os coautores com o número de trabalhos produzidos em conjunto bem como os assuntos abordados e os respectivos anos de publicação agrupados.

O RD disponibiliza um quadro estatístico de produtividade, onde é possível visualizar o número dos trabalhos agrupados por tipo de coleção, a medida que estão sendo depositados no RD.

Na página inicial nas referências são sinalizados todos os autores IPEN, ao clicar nesse símbolo será aberta uma nova página correspondente à aquele autor – trata-se da página do pesquisador.

Na página do pesquisador, é possível verificar, as variações do nome, a relação de todos os trabalhos com texto completo bem como um quadro resumo numérico; há links para o Currículo Lattes e o Google Acadêmico ( quando esse for informado).

ATENÇÃO!

ESTE TEXTO "AJUDA" ESTÁ SUJEITO A ATUALIZAÇÕES CONSTANTES, A MEDIDA QUE NOVAS FUNCIONALIDADES E RECURSOS DE BUSCA FOREM SENDO DESENVOLVIDOS PELAS EQUIPES DA BIBLIOTECA E DA INFORMÁTICA.

O gerenciamento do Repositório está a cargo da Biblioteca do IPEN. Constam neste RI, até o presente momento 20.950 itens que tanto podem ser artigos de periódicos ou de eventos nacionais e internacionais, dissertações e teses, livros, capítulo de livros e relatórios técnicos. Para participar do RI-IPEN é necessário que pelo menos um dos autores tenha vínculo acadêmico ou funcional com o Instituto. Nesta primeira etapa de funcionamento do RI, a coleta das publicações é realizada periodicamente pela equipe da Biblioteca do IPEN, extraindo os dados das bases internacionais tais como a Web of Science, Scopus, INIS, SciElo além de verificar o Currículo Lattes. O RI-IPEN apresenta também um aspecto inovador no seu funcionamento. Por meio de metadados específicos ele está vinculado ao sistema de gerenciamento das atividades do Plano Diretor anual do IPEN (SIGEPI). Com o objetivo de fornecer dados numéricos para a elaboração dos indicadores da Produção Cientifica Institucional, disponibiliza uma tabela estatística registrando em tempo real a inserção de novos itens. Foi criado um metadado que contém um número único para cada integrante da comunidade científica do IPEN. Esse metadado se transformou em um filtro que ao ser acionado apresenta todos os trabalhos de um determinado autor independente das variáveis na forma de citação do seu nome.

A elaboração do projeto do RI do IPEN foi iniciado em novembro de 2013, colocado em operação interna em julho de 2014 e disponibilizado na Internet em junho de 2015. Utiliza o software livre Dspace, desenvolvido pelo Massachusetts Institute of Technology (MIT). Para descrição dos metadados adota o padrão Dublin Core. É compatível com o Protocolo de Arquivos Abertos (OAI) permitindo interoperabilidade com repositórios de âmbito nacional e internacional.

1. Portaria IPEN-CNEN/SP nº 387, que estabeleceu os princípios que nortearam a criação do RDI, clique aqui.


2. A experiência do Instituto de Pesquisas Energéticas e Nucleares (IPEN-CNEN/SP) na criação de um Repositório Digital Institucional – RDI, clique aqui.

O Repositório Digital do IPEN é um equipamento institucional de acesso aberto, criado com o objetivo de reunir, preservar, disponibilizar e conferir maior visibilidade à Produção Científica publicada pelo Instituto, desde sua criação em 1956.

Operando, inicialmente como uma base de dados referencial o Repositório foi disponibilizado na atual plataforma, em junho de 2015. No Repositório está disponível o acesso ao conteúdo digital de artigos de periódicos, eventos, nacionais e internacionais, livros, capítulos, dissertações, teses e relatórios técnicos.

A elaboração do projeto do RI do IPEN foi iniciado em novembro de 2013, colocado em operação interna em julho de 2014 e disponibilizado na Internet em junho de 2015. Utiliza o software livre Dspace, desenvolvido pelo Massachusetts Institute of Technology (MIT). Para descrição dos metadados adota o padrão Dublin Core. É compatível com o Protocolo de Arquivos Abertos (OAI) permitindo interoperabilidade com repositórios de âmbito nacional e internacional.

O gerenciamento do Repositório está a cargo da Biblioteca do IPEN. Constam neste RI, até o presente momento 20.950 itens que tanto podem ser artigos de periódicos ou de eventos nacionais e internacionais, dissertações e teses, livros, capítulo de livros e relatórios técnicos. Para participar do RI-IPEN é necessário que pelo menos um dos autores tenha vínculo acadêmico ou funcional com o Instituto. Nesta primeira etapa de funcionamento do RI, a coleta das publicações é realizada periodicamente pela equipe da Biblioteca do IPEN, extraindo os dados das bases internacionais tais como a Web of Science, Scopus, INIS, SciElo além de verificar o Currículo Lattes. O RI-IPEN apresenta também um aspecto inovador no seu funcionamento. Por meio de metadados específicos ele está vinculado ao sistema de gerenciamento das atividades do Plano Diretor anual do IPEN (SIGEPI). Com o objetivo de fornecer dados numéricos para a elaboração dos indicadores da Produção Cientifica Institucional, disponibiliza uma tabela estatística registrando em tempo real a inserção de novos itens. Foi criado um metadado que contém um número único para cada integrante da comunidade científica do IPEN. Esse metadado se transformou em um filtro que ao ser acionado apresenta todos os trabalhos de um determinado autor independente das variáveis na forma de citação do seu nome.