Navegação Eventos - Artigos por ano de publicação "2019"

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  • IPEN-DOC 26791

    BEU, CASSIA M.L. ; LANDULFO, EDUARDO . Threshold wind speed and turbulence under LLJs events at Ipero - Brazil. In: COMERON, ADOLFO (Ed.); KASSIANOV, EVGUENI I. (Ed.); SCHAFER, KLAUS (Ed.); PICARD, RICHARD H. (Ed.); WEBER, KONRADIN (Ed.); SINGH, UPENDRA N. (Ed.) SPIE REMOTE SENSING, September 9-12, 2019, Strasbourg, France. Proceedings... Bellingham, WA, USA: SPIE, 2019. p. 1115212-1 - 1115212-10. (Proceedings of SPIE Vol. 11152, Remote Sensing of Clouds and the Atmosphere XXIV). DOI: 10.1117/12.2532281

    Abstract: The threshold wind speed is a useful criterion in determining whether strong turbulence is generated within the Stable Boundary Layer (SBL), the layer where all surface emissions remain con ned during the night. Con dence turbulence estimates are extremely important for atmospheric transport and dispersion simulations, although due to its complex dinamics many aspects of the SBL are neglected by numerical models that, in turn, are the inputs and boundary conditions for the transport and dispersion simulations. Turbulence is especially important during severe episodies like hazardous material accidental releases, for example. Turbulence intensity can a ect the dispersion speed, released material concentration, and its reach. For many decades, remote sensing has been an important tool in lling the gap of information and providing advances in the atmospheric sciences. The doppler lidar is increasingly being used for micrometeoroly and Planetary Boundary Layer (PBL) studies because of its autonomy and long range capability, in contrast with traditional techniques as radioprobes and captive balloons. After 1 year of continuous measurements with a doppler lidar, it was possible to determine the threshold wind speed for Ipero, Sao Paulo, Brazil. Besides threshold wind speed, it was observed that the SBL turbulence has a straight relationship with the Low-Level Jets (LLJs) that frequently occur over the region. The vertical turbulence distribution depends greatly on the LLJ characteristics, which in turn is highly variable during its life cycle. The strong turbulence regime is associated to the stronger LLJs, that presents a more de ned pattern. In contrast, weak LLJs (that generate weaker SBL turbulence) present more dispersive characteristics in respect to the entire dataset. These di erences are seen both for the LLJ height as for the turbulence vertical pro le. These results will contribute for the atmospheric modeling and dispersion simulations, as well for the environmental studies at Ipero.

    Palavras-Chave: wind; earth atmosphere; dispersions; jets; boundary layers

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  • IPEN-DOC 26391

    OLIVEIRA, GLAUCIA A.C. de ; LAINETTI, PAULO E.O. ; BUSTILLOS, JOSE O.W.V. ; PIRANI, DEBORA A. ; BERGAMASCHI, VANDERLEI S. ; FERREIRA, JOAO C. ; SENEDA, JOSE A. . Thorium and lithium in Brazil. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 5915-5922.

    Abstract: Brazil has one of the largest reserves of thorium in the world, including rare earth minerals. It has developed a great program in the field of nuclear technology for decades, including facilities to produced oxides to microspheres and thorium nitrates. Nowadays, with the current climate change, it is necessary to reduce greenhouse gas emissions, one of this way is exploring the advent of IV Generation reactors, molten salt reactors, that using Thorium and Lithium. Thorium's technology is promising and has been awaiting the return of one nuclear policy that incorporates its relevance to the necessary levels, since countries like the BRICS (without Brazil) have been doing so for years. Brazil has also been developing studies on the purification of lithium, and this one associated to thorium, are the raw material of the molten salt reactors. This paper presents a summary of the thorium and lithium technology that the country already has, and its perspectives to the future.

    Palavras-Chave: lithium; molten salt reactors; nuclear fuels; public policy; purification; thorium; uranium; brazil

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  • IPEN-DOC 26294

    MASSEI, MARIANA G.R. ; ZAIM, MARCIO H.; MACHADO, LUCI D.B. ; MATHOR, MONICA B. . Thermoplastic polyurethane as biomaterial: study of the modification caused by ionizing radiation. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 2598-2608.

    Abstract: New materials are being studied and widely applied in the health area, highlighting biocompatible polymers as the most versatile. Among these polymers, we developed the methodology for the manufacture of Thermoplastic Polyurethane films for application as Biomaterials. The proposed sterilization by ionizing radiation requires the study and characterization of the material to evaluate possible losses or modifications, due to the influence that the radiation can cause in the polymer chains, losing the characteristics for the purpose used. Therefore, the present work evaluates, through chemical and physicochemical characterization, the possible extension of the changes caused by the radiation in the polyurethane film. The material is produced in an environment with controlled temperature and humidity and subjected to increasing doses of gamma (15, 25 and 50 kGy), ethylene oxide and plasma as comparative techniques. The techniques DSC (Differential Scanning Calorimetry) TGA (Thermogravimetry) and FTIR-ATR (Fourier Transform Infrared Spectrometry) have proved that the material, after applied the sterilization techniques, maintains its physical-chemical characteristics and does not suffer any modifications after the treatment.

    Palavras-Chave: biological materials; calorimetry; chemical analysis; cobalt 60; films; fourier transformation; gamma radiation; infrared spectra; polyurethanes; radiation dose units; sterilization; thermoplastics

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  • IPEN-DOC 26390

    CUNHA, CAIO J.C.M.R.; RODRÍGUEZ, DANIEL G.; LIRA, CARLOS A.B.O.; STEFANI, GIOVANNI L. ; LIMA, FERNANDO R.A.. Thermohydraulic analysis of a fuel element of the AP1000 reactor with the use of mixed oxides of U / Th using the computational fluid dynamic code (CFX). In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 5901-5914.

    Abstract: The present work carried out a thermohydraulic analysis of a typical fuel assembly of the reactor AP1000 changing the type of fuel, of UO2 conventionally used for a mixture of oxides of (U,Th)O2 realizing some simplifications in the original design, with the objective to develop of an initial methodology capable of predicting the thermohydraulic behavior of the reactor within the limits established by the manufacturer. An expression for the power density was determined using a coupled neutronic thermohydraulic calculation; once the final expression for power density was determined, the axial and radial temperature profiles in the assembly, as well as the pressure drop and the distribution of the coolant density, were evaluated. Due to the increase in research done on thorium, such as the work of [1], [2], [3], [4] and [5], as well as the mass diffusion of the AP1000, as is the case with [6] and [7]. The present study developed a simplified model, where burnable poisons and spacer grids were not considered, however, it is a consistent model, but with the insertion of these, a more accurate representation of the reactor is expected, providing operational transient analyzes. This tends to strengthen the lines of research that have been carrying out work on the AP1000, as well as in the general sphere of nuclear power plants.

    Palavras-Chave: boundary conditions; burnable poisons; c codes; calculation methods; fuel assemblies; fuel substitution; mixtures; monte carlo method; power density; pwr type reactors; temperature distribution; thermal hydraulics; thorium; transients; uranium dioxide

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  • IPEN-DOC 26137

    CARDOSO, JOAQUIM C.S. ; XAVIER, MARCOS . The whole body counting experience on the internal contamination of radionuclides at IPEN/CNEN-SP. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 234-238.

    Abstract: The intake of radioactive material by workers can occur in the radiopharmaceuticals production, during the handling of radiopharmaceuticals in nuclear medicine and in bi ological and research laboratories. The members of staff occupationally exposed to radionuclides are routinely monitored for the purpose of quantitative assessment of internal exposure . Direct measurements of whole body and t hyroid contents provide an estimate of the activity of these radionuclides in the potentially exposed workers. The whole body measurements of the workers, trainees and visitors are routinely performed by the In Vivo Monitoring Laboratory (LMIV) of the Ener gy and Nuclear Research Institute (IPEN/CNEN SP). The frequency of measurements is defined by the Radioprotection Service (SRP) and the Dose Calculation Group of IPEN. For this purpose LMIV has two counters, whole body. NaI(Tl) (8x4”), and thyroid one, NaI (Tl) (3x3”). The system was calibrated in energy and efficiency, with calibration sources of Am 241, Co 60, Cs 137 and Eu 152 with gamma emissions between 59.54 and 1408.08 keV, positioned within Alderson Research Labs. anthropomorphic phantom. The backgro und measures were obtained of worker’s spectrum that wasn’t exposed occupationally yet. The concepts adopted in the HPS N13.30 Standard and proposed in ISO documents for standardization were used for activity measurements. During the period January 2014 to December 2018, approximately 3500 measurements had been carried in workers who develop tasks related to the production and research. The activities of the radionuclides and the workers’ tasks relationship had been evaluated.

    Palavras-Chave: calibration; dose equivalents; nai detectors; occupational exposure; personnel; radiation doses; radiation protection; radioisotopes; radionuclide kinetics; thyroid; whole-body counting; brazilian cnen

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  • IPEN-DOC 26350

    OLIVA, AMAURY M. ; ALVES FILHO, HERMES; BARROS, RICARDO C.; CURBELO, JESUS P.. The spectral deterministic method applied to nêutron fixed-source discrete ordinates problems in X, Y-geometry for multigroup calculations. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 4702-4716.

    Abstract: A new approach for the development of a coarse-mesh numerical spectral nodal method is presented in this paper. This method, referred to as the Spectral Deterministic Method { Constant Nodal (SDM{CN), is based on a spectral analysis of the multigroup X,Y-Geometry, linearly anisotropic scattering neutron transport equations in discrete ordinates ( SN)formulation for xed-source calculations in non-multiplying media. In this paper we present typical model problems to illustrate the accuracy and the e ciency for coarse-mesh energy multigroup SN calculations of the SDM-CN method. The numerical results obtained are compared with the traditional ne-mesh Diamond Di erence (DD) method and the results obtained by DOT{II and TWOTRAN codes. The numerical results are also compared with the spectral nodal method, spectral Green's function (SGF).

    Palavras-Chave: boltzmann equation; comparative evaluations; comparative evaluations; computerized simulation; d codes; discrete ordinate method; finite difference method; multigroup theory; neutron transport; nodal expansion method; scattering; t codes

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  • IPEN-DOC 26158

    CAVALCANTI, HELOISA S. ; ZAMBONI, CIBELE B. ; MIURA, VIVIANI M. ; AZEVEDO, MARIA R.. The reference value for blood potassium in inhabitants of Brazil by EDXRF technique. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 541-544.

    Abstract: In the present study was intend to use the Energy Dispersive X-Ray Fluorescence technique (EDXRF) to perform potassium dosage in human beings using whole blood aiming its application, in the future, for studying in more details the common deficienciesin Brazilian population helping their diagnostic. To perform this investigation a total of 227 whole blood samples were analyzed. The influence of gender was also investigated. The results provide information which permit to perform a discussion about the advantages and limitations of using this alternative methodology for biochemistry examinations.

    Palavras-Chave: biochemistry; blood; brazil; doses; human populations; potassium; x-ray fluorescence analysis; x-ray spectroscopy

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  • IPEN-DOC 26517

    CAPPUZZELLO, F.; AGODI, C.; ACOSTA, L.; AMADOR-VALENZUELA, P.; AUERBACH, N.; BAREA, J.; BELLONE, J.I.; BELMONT, D.; BIJKER, R.; BONANNO, D.; BORELLO-LEWIN, T.; BOZTOSUN, I.; BRANCHINA, V.; BRASOLIN, S.; BRISCHETTO, G.; BRUNASSO, O.; BURRELLO, S.; CALABRESE, S.; CALABRETTA, L.; CALVO, D.; CAPIROSSI, V.; CARBONE, D.; CAVALLARO, M.; CHEN, R.; CIRALDO, I.; CHAVEZ LOMELI, E.R.; COLONNA, M.; D'AGOSTINO, G.; DJAPO, H.; DE GERONIMO, G.; DELAUNAY, F.; DESHMUKH, N.; FARIA, P.N. de; ESPEJEL, R.; FERRARESI, C.; FERREIRA, J.L.; FERRETTI, J.; FINOCCHIARO, P.; FIRAT, S.; FISICHELLA, M.; FLORES, A.; FOTI, A.; GALLO, G.; GARCIA-TECOCOATZI, H.; GONGORA, B.; HACISALIHOGLU, A.; HAZAR, S.; HUERTA, A.; KOTILA, J.; KUCUK, Y.; IAZZI, F.; LANZALONE, G.; LA VIA, F.; LAY, J.A.; LENSKE, H.; LINARES, R.; LONGHITANO, F.; LO PRESTI, D.; LUBIAN, J.; MA, J.; MARIN-LAMBARRI, D.; MARTINEZ, S.; MAS, J.; MEDINA, N.H.; MENDES, D.R.; MEREU, P.; MORALLES, M. ; OLIVEIRA, J.R.B.; ORDONEZ, C.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PIETRALLA, N.; PINNA, F.; REITO, S.; REZA, G.; RIES, P.; RIFUGGIATO, D.; RODRIGUES, M.R.D.; RUSSO, A.D.; RUSSO, G.; SANDOVAL, S.; SANTOPINTO, E.; SANTOS, R.B.B.; SGOUROS, O.; SILVEIRA, M.A.G. da; SOLAKCI, S.O.; SOULIOTIS, G.; SOUKERAS, V.; SPATAFORA, A.; TORRESI, D.; TUDISCO, S.; VSEVOLODOVNA, R.I.M.; VARGAS, H.; VEGA, G.; WANG, J.S.; WERNER, V.; YANG, Y.Y.; YILDIRIN, A.; ZAGATTO, V.A.B.. The NUMEN project @ LNS: status and perspectives. In: MARUYAMA, REINA (Ed.) SYMMETRIES AND ORDER: ALGEBRAIC METHODS IN MANY BODY SYSTEMS, October 5-6, 2018, Connecticut, USA. Proceedings... Melville, NY, USA: AIP Publishing, 2019. p. 030003-1 - 030003-6. (AIP Conference Proceedings, 2150). DOI: 10.1063/1.5124592

    Abstract: The NUMEN project aims at accessing experimentally driven information on Nuclear Matrix Elements (NME) involved in the half-life of the neutrinoless double beta decay (0υββ), by high-accuracy measurements of the cross sections of Heavy Ion (HI) induced Double Charge Exchange (DCE) reactions. Particular interest is given to the (18O,18Ne) and (20Ne,20O) reactions as tools for β+β+ and β-β- decays, respectively. First evidence about the possibility to get quantitative information about NME from experiments is found for both kind of reactions. In the experiments, performed at INFN - Laboratory Nazionali del Sud (LNS) in Catania, the beams are accelerated by the Superconducting Cyclotron (CS) and the reaction products are detected by the MAGNEX magnetic spectrometer. The measured cross sections are challengingly low, limiting the present exploration to few selected isotopes of interest in the context of typically low-yield experimental runs. A major upgrade of the LNS facility is foreseen in order to significantly increase the experimental yield, thus making feasible a systematic study of all the cases of interest. Frontiers technologies are going to be developed, to this purpose, for the accelerator and the detection systems. In parallel, advanced theoretical models are developed aiming at extracting the nuclear structure information from the measured cross sections.

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  • IPEN-DOC 28092

    CAPPUZZELLO, F.; AGODI, C.; ACOSTA, L.; ALTANA, C.; AMADOR-VALENZUELA, P.; AUERBACH, N.; BAREA, J.; BELLONE, J.; BIJKER, R.; BONANNO, D.; BORELLO-LEWIN, T.; BOZTOSUN, I.; BRANCHINA, V.; BRASOLIN, S.; BRISCHETTO, G.; BRUNASSO, O.; BURRELLO, S.; CALABRESE, S.; CALABRETTA, L.; CALVO, D.; CAPIROSSI, V.; CARBONE, D.; CAVALLARO, M.; CHARON GARCIA, L.E.; CHAVEZ LOMELI, E.R.; CHEN, R.; CIRALDO, I.; COLONNA, M.; D’AGOSTINO, G.; DELAUNAY, F.; DESHMUKH, N.; DJAPO, H.; DE GERONIMO, G.; DE LOS RIOS, K.; FERRARESI, C.; FERREIRA, J.L.; FERRETTI, J.; FINOCCHIARO, P.; FIRAT, S.; FISICHELLA, M.; FOTI, A.; GALLO, G.; GARCIA-TECOCOATZI, H.; HACISALIHOGLU, A.; HUERTA-HERNANDEZ, A.; KOTILA, Z.J.; KUCUK, Y.; IAZZI, F.; LANZALONE, G.; LAY, J.A.; LA FAUCI, L.; LA VIA, F.; LENSKE, H.; LINARES, R.; LO PRESTI, D.; LUBIAN, J.; MA, J.; MARIN-LAMBARRI, D.; MAS RUIZ, J.; MEDINA, N.H.; MENDES, D.R.; MEREU, P.; MORALLES, M. ; NERI, L.; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PIETRALLA, N.; PINNA, F.; REITO, S.; RIES, P.; RODRIGUES, M.R.D.; RUSSO, A.D.; RUSSO, G.; SANTOPINTO, E.; SANTOS, R.B.B.; SERBINA, L.; SGOUROS, O.; SILVEIRA, M.A.G. da; SOLAKCI, S.O.; SOULIOTIS, G.; SOUKERAS, V.; SPATAFORA, A.; TORRESI, D.; TUDISCO, S.; VARGAS HERNANDEZ, H.; VSEVOLODOVNA, R.I.M.; WANG, J.S.; WERNER, V.; YANG, Y.Y.; YILDIRIN, A.; ZAGATTO, V.A.B.. The NUMEN project @ LNS: status and perspectives. In: CIVITARESE, OSVALDO (Ed.); STEKL, IVAN (Ed.); SUHONEN, JOUNI (Ed.) WORKSHOP ON CALCULATION OF DOUBLE-BETA-DECAY MATRIX ELEMENTS, May 27-31, 2019, Prague, Czech Republic. Proceedings... Melville, NY, USA: AIP Publishing, 2019. p. 020003-1 - 020003-6. (AIP Conference Proceedings, 2165). DOI: 10.1063/1.5130964

    Abstract: The NUMEN project aims at accessing experimentally driven information on Nuclear Matrix Elements (NME) involved in the half-life of the neutrinoless double beta decay (0νββ), by high-accuracy measurements of Heavy Ion (HI) induced Double Charge Exchange (DCE) reaction cross sections. In particular, the (18O,18Ne) and (20Ne,20O) reactions are used as tools for β+β+ and β-β- decays, respectively. In the experiments, performed at INFN - Laboratory Nazionali del Sud (LNS) in Catania, the beams are accelerated by the Superconducting Cyclotron (CS) and the reaction ejectiles are detected the MAGNEX magnetic spectrometer. The measured cross sections are challengingly low (a few nb), being the total reaction cross section much larger (a few b), thus a high sensitivity and a large rejection capability are demanded to the experimental set-up. This limits the present exploration to few selected isotopes of interest in the context of typically low-yield experimental runs. A major upgrade of the LNS facility is foreseen in order to increase the experimental yield of at least two orders of magnitude, still keeping the high sensitivity of the present set-up, making it feasible a systematic study of all the cases of interest. Frontiers technologies are going to be developed, to this purpose, for the accelerator and the detection systems. In parallel, advanced theoretical models are being developed in order to extract the nuclear structure information from the measured cross sections.

    Palavras-Chave: lasers; pulses; laser beam machining

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  • IPEN-DOC 26134

    SANTOS, WILLIAM S. ; NEVES, LUCIO P.; PERINI, ANA P.; SANTOS, CARLA J.; BELINATO, WALMIR; CALDAS, LINDA V.E. . The influence of the lead eyewear geometry on the doses to the eye lens. In: ABEN (Ed.) INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro, 2019. p. 186-191.

    Abstract: The scattered radiation from interventional procedures is an important source of radiological risk for the medical staff. Considering all affected organs, the eye lens are among the most critical organs. As pointed out by several studies, even for low radiation doses, the appearance of cataract may occur. Considering this scenario, the radiation doses to the eye lens were determined using three different lead eyewear models commonly employed. The fluoroscopist was represented by an adult virtual anthropomorphic phantom (MASH3), coupled to the Monte Carlo code MCNP6.1™, in a typical cardiac interventional radiology procedure. The eyewear had 0.5 mmPb each, and the evaluation was carried out for four different beam angulations (PA, LAO90, LAO65 e RAO65), 80 kVp of tube voltage and HVL of 4 mmAl. The results pointed out that the shielding efficiency has a strong dependence on the eyewear type utilized, which may be very useful for the decision-making during the acquisition of such equipments.

    Palavras-Chave: crystalline lens; equivalent radiation doses; fluoroscopy; lead; monte carlo method; occupational exposure; phantoms; radiation protection; shielding

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  • IPEN-DOC 26244

    VIVALDINI, BIANCA F. ; ARAUJO, ELAINE B. de . The influence of generator eluate in radiolabeling PSMA 11 kit with (68)Ga. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 1968-1974.

    Abstract: Gaining prominence in clinical practice, the 68Ga, positron emitter radionuclide easily obtained by 68Ge/68Ga generator elution, has shown potential and excellent quality on radiolabeling of peptide for use in positron emission tomography (PET), in particular urea-based inhibitor peptides, directed to the prostate-specific membrane receptor (PSMA). Previous studies with the PSMA linked to the chelator HBED-CC (PSMA-11) radiolabeled with 68Ga showed high contrast PET/CT images to evaluate recurrence and metastasis of prostate cancer, becoming an important imaging agent in the clinical routine. This work intended to evaluate the influence of the quality of the 68Ge/68Ga generator eluate in direct labeling of PSMA-11 with 68Ga, assisting in the development of kit for prompt radiolabeling. It was evaluated the 68GaCl3 eluate from 68Ge/68Ga non-GMP generator (manufacturer A) and 68Ge/68Ga GMP generator (manufacturer B), both commercially available. To evaluate the influence of the 68Ga eluate on radiochemical yield of the preparations, the radiochemical purity was determined by thin layer chromatography and HPLC. The radiolabeling with non-GMP generator eluate was determined with and without preliminary purification of the 68 gallium chloride eluate, employing cationic purification columns. The results showed higher radiochemical yield with the 68GaCl3 eluate from the 68Ge/68Ga GMP generator, obtaining the radiolabeled product more easily and speed to clinical practice, without preliminary purification, as opposed to the use of non-GMP 68Ge/68Ga generator which required preliminary purification of the 68GaCl3 eluate to promote satisfactory radiochemical purity results.

    Palavras-Chave: gallium 68; germanium 68; labelling; membrane proteins; neoplasms; positron computed tomography; prostate

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  • IPEN-DOC 26217

    ALVES, ITALO H. ; MARUMO, JULIO T. ; VICENTE, ROBERTO . The importance of a document management policy to radioactive waste management. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 1379-1388.

    Abstract: The absence of document management policies on the nuclear area, in Brazil, can affect the short- and the long-term safety of radioactive waste management. Knowledge about the radioactive content of the waste is essential to its safety. However, in the national legal framework, there is no specific rules about the maintenance of documents/information, neither procedures that are related to management of records that ensures their integrity, authenticity and preservation. Considering the nature and the magnitude of the dangers associate to radioactive waste, information related to all steps of its life cycle, from generation to final disposal, is essential to an appropriate management and disposal, in line with the principles of preserving the human health and the environmental, today and in the future. This paper intends to indicate all the main aspects of a document management policy that could impact on radioactive waste management, and to discuss how a national policy establishing guidance to all those involved in the generation and the management of the radioactive waste could help improve the processes of recording and preserving the required information to the future.

    Palavras-Chave: documentation; legislation; radiation protection; radioactive waste management; regulations; brazilian cnen

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  • IPEN-DOC 26140

    NOGUEIRA, ANDRÉ L.; MUNITA, CASIMIRO S. . The effect of data standardization in cluster analysis. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 321-329.

    Abstract: The application of multivariate techniques to experimental results requires a responsibility on behalf of the researcher to understand, evaluate and interpret their results, especially the ones that are more complex. In this work, the impact of three standardization techniques on the formation of clusters by the SOM (self-organizing map) neural network were studied. The techniques studied were logarithm (log10), generalized-log and improved min-max. The studies were performed using two databases consisting of 298 and 146 samples and containing the mass fractions of As, Na, K, La, Yb, Lu, U, Sc, Cr, Fe, Cs, Eu, Tn, Hf and Th, determined by neutron activation analysis. The results were evaluated using validation indices.

    Palavras-Chave: algorithms; cluster analysis; computer codes; data; mass; neural networks; neutron activation analysis; standardization; statistical models

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  • IPEN-DOC 26331

    BARABAS, ROBERTA de C. ; BARABÁS, CARLOS ; SABUNDJIAN, GAIANE . The development of a multisensory program for the dissemination of the beneficial applications of the nuclear technology. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 3770-3781.

    Abstract: Despite all peaceful applications of nuclear technology, it is still addressed with prejudice. Prejudices may be explicit (conscious) or implicit (unconscious). However, either explicit or implicit, they interfere with individuals’ behavior and attitudes. Prejudices against any theme may be reduced and even reversed by new learning on the theme. Multisensory techniques have proven to make learning richer and more motivating. This work aims to present the development of a multisensory program designed for learning about the beneficial applications of nuclear technology and compare this program to a 12-week traditional teaching program with lecture classes about the nuclear technology. The multisensory program was held at the Instituto de Pesquisas Energéticas e Nucleares (IPEN) for a group of teachers. Assisted tours to the IEA-R1 and to the Centro da Tecnologia das Radiações (CTR) as well as a coffee break serving a variety of commercially-available foods containing irradiated ingredients were part of the multisensory approach. The Implicit Association Test (IAT) was administered before and after the program to identify and measure the implicit associations towards the nuclear technology. This multisensory program was compared to a 12-week traditional teaching program with lecture classes about the nuclear technology held at IPEN. Unlike the multisensory program, the IAT results from the traditional program demonstrated that the lecture classes were not effective for changing the implicit associations. The multisensory program was an effective tool for changing the implicit associations and can be useful for disseminating the beneficial applications of the nuclear technology.

    Palavras-Chave: education; f codes; learning; nuclear energy; public opinion; technology impacts; testing; brazilian cnen

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  • IPEN-DOC 26382

    SANCHEZ, ANDREA ; CARLUCCIO, THIAGO; SABUNDJIAN, GAIANE . The cross sections obtained by the serpent code and formatting the input data for the PARCS code using the GenPMAXS code. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 5503-5512.

    Abstract: The Purdue Advanced Reactor Core Simulator (PARCS) is a computer code that solves the time-dependent two-group neutron diffusion equation in three-dimensional Cartesian geometry using nodal methods to obtain the transient neutron flux distribution. The code is used in the analysis of reactivity-initiated accidents in light-water reactors where spatial effects may be important. It may be run in the stand-alone mode or coupled to other NRC thermal-hydraulic codes such as RELAP5. The PARCS neutron code accepts libraries from HELIOS, TRITON, WIMS, SERPENT, etc., codes, but for some libraries is required special formatting. In the case of the SERPENT code, the GenPMAXS code must be used for the PARCS code to be able to read the cross sections library correctly. This work is part of a study on the PARCS/RELAP5 coupling for analyzing the control rod ejection of the Angra 2 reactor core. For this case, the core cross sections were obtained for 6 different branches varying the fuel temperature, moderator temperature, moderator density, boron concentration and considering rods removed and inserted. After obtaining the cross sections with the code SERPENT 2.1.26, these data were passed by a special formatting realized with the code GenPMAXS v6.2. Since GenPMAXS has several options controlling how to process the cross-sections generated by Serpent, a several doubts arose about the correct use of the code. When the doubts are answered, the file with the input data that will be used for the PARCS / RELAP coupling can be built.

    Palavras-Chave: angra-2 reactor; computerized simulation; control elements; coupling; cross sections; monte carlo method; p codes; reactor cores; rod ejection accidents; s codes

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  • IPEN-DOC 28091

    STEFANI, GIOVANNI L. de ; MAIORINO, JOSE R. . The AP-Th 1000 an advanced concept to use MOX of thorium in a closed fuel cycle. In: INTERNATIONAL CONFERENCE ON EMERGING NUCLEAR ENERGY SYSTEMS, 19th, October 6-9, 2019, Bali, Indonesia. Proceedings... 2019.

    Abstract: This work presents a study for the firsts 4 cycles of recharge of the reactor AP-Th1000, a version of the reactor AP1000 using mixed uranium and thorium oxides as fuel, which the feasibility studies had been already demonstrated in previous study for a first cycle. The AP-Th 1000 study is a proposal to start the thorium fuel cycle using the most common reactor technology in the nuclear industry, the Pressurized Water Reactors (PWR). A preliminary closed cycle study is carried out for the first 4 cycles where the production of 233U are evaluated. In cycles 2, 3 and 4, new assemblies with a fuel of the remaining uranium from the previous cycle are used instead of assemblies removed from the core, thus being a mixture of different uranium’s (232U, 233U, 234U, 235U, 236U and 238U) , where the additional fissile material inserted into the fuel to ensure the 18-month operation of the reactor comes from uranium oxides enriched at 20 w / o.. The results demonstrate the viability of the proposal and again using closed fuel cycle.

    Palavras-Chave: thorium; pwr type reactors; reactor cores; fuel cycle

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  • IPEN-DOC 26549

    BAPTISTA, A.; NUNEZ, S.C.; MARTIN, A.A.; RIBEIRO, M.S. . Targets of photodyamic inactivation in fungal cells. In: HASAN, TAYYABA (Ed.) INTERNATIONAL PHOTODYNAMIC ASSOCIATION WORLD CONGRESS, 17th, June 28 - July 4, 2019, Cambridge, Massachusetts, USA. Proceedings... Bellingham, WA, USA: SPIE, 2019. p. 11070BY-1 - 11070BY-6. (Proceedings SPIE 11070). DOI: 10.1117/12.2537128

    Abstract: Photodynamic inactivation (PDI) has been reported to be effective to eradicate a wide variety of pathogens, including antimicrobial-resistant microorganisms. However, there are conflicting reports in the literature about the effect of growth phase on the susceptibility to PDI. The aim of this study was to identify the potential molecular targets of PDI on Candida albicans in exponential growth phase after PDI mediated by methylene blue (50μM) and exposure to a 660nm-LED (P=360mW). For this task, scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR) techniques were employed. Pre-irradiation time was set at 10min and exposure time was 15 min delivering a radiant exposure of 162 J/cm2 on a 24-well plate of about 2 cm2. Morphological analysis revealed cell damage after PDI. FT-IR predominantly showed degradation of functional groups related to C-O of deoxyribose; C-C of DNA; C-O stretching vibration of C-OH group of ribose-RNA; P-O stretching modes from the phosphodiester groups of nucleic acids; C=C, C=N, C=O, N=H proteins and amides. Previous studies from our group had demonstrated different targets on the same cells but in stationary growth phase. Therefore, we can conclude that PDI promoted damage to intracellular structures in fungal cells at exponential-phase growth and information on the susceptibility of different growth phases to PDI can be of great importance for the development of treatment strategies that would lead to inactivation of fungal cells in all possible phases of growth in a way that would turn the clinical PDI treatment effective and predictable.

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  • IPEN-DOC 26280

    JACOVONE, RAYNARA M.S. ; TOMINAGA, FLAVIO K. ; BRANDAO, OCTAVIO A.B. ; GARCIA, RAFAEL H.L. ; SAKATA, SOLANGE K. . Synthesis of reduced graphene oxide by gamma irradiation. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 2398-2405.

    Abstract: Graphene is a 2D carbon-based nanomaterial that has a high specific surface area with remarkable physical and chemical properties. These unique properties make graphene a nanomaterial with wide electrochemical applications. However, it is not possible to functionalize graphene sheets and increase their field of application because there are no organic functions in their surface. So, an important precursor of graphene, graphene oxide (GO), then contains oxygen functional groups on the surface is been using functionalized. Partial reduction of graphene oxide leads to reduced graphene, a nanomaterial that combines both properties of graphene and graphene oxide: an excellent electrical and thermal conductivity and remaining oxygen groups that allow its functionalization. In the literature it is described many ways to produce reduced oxide graphene from graphene oxide, such as chemical reduction using hydrazine hydrate or NaBH4 or thermal reduction using high temperatures. Here in it is described an attractive and green process to reduce graphene oxide in aqua solution using gamma radiation. Exfoliated graphene oxide (1-100mg / L) under inert medium was submitted to gamma radiation. The radiation dose ranged from 20 to 80 kGy and the product was centrifuged. The characterization was performed by X-Ray Diffraction (XRD), Infrared Spectroscopy (ATR-FTIR) and Thermogravimetric analysis (TGA). The XRD results demonstrated characteristic diffraction peaks at about 10° and 25° corresponding to GO and Graphene, respectively, indicating the rGO formation. ATR-FTIR showed the characteristic peaks of functional groups (epoxy, hydroxyl and carboxyl) for GO. After the gamma irradiation, it was noticed a reduction at the intensity of the peaks at of carboxyl/carbonyl an increase at aromatic carbon bond. TGA analysis indicated a decrease of the oxygen groups.

    Palavras-Chave: fourier transformation; gamma radiation; graphene; infrared spectra; irradiation; nanomaterials; radiation dose ranges; thermal gravimetric analysis; water; x-ray diffraction

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  • IPEN-DOC 26271

    OLIVEIRA, MARIA J.A. de ; MOREIRA, EDSON G. ; SALVADOR, PABLO A.V. ; ALCANTARA, MARA T.S. ; LUGAO, ADEMAR B. . Synthesis of polymeric gels crosslinked by ionizing radiation for treatment of cutaneous leishmaniasis. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 2276-2283.

    Abstract: Ionizing radiation is a very efficient, versatile and clean tool for modifying polymers for various applications, including in the biomedical area. The advantages of using radiation include the ability to process materials in any physical form, at a convenient temperature, often at room temperature. There is no need for the use of initiators or other chemicals and it is easily carried out with high reliability and does not generate any waste. In the research support area, several materials have been treated in order to find correlations between the applied dose and some property of the material susceptible to be modified with gamma radiation. This study proposes the development of polymeric gels (cream) with Glucantime (Sb V) and gel (cream) with silver nanoparticles, for alternative treatment of cutaneous Leishmaniasis. A cobalt-60 gamma irradiation source was used for crosslinking the polymers, forming the silver nanoparticles and simultaneous sterilization, leaving the product ready for use. Polymeric gels were characterized by physico-chemical techniques, instrumental nêutron activation analysis (INAA), scanning electron microscopy (SEM), and transmission electron microscopy (TEM).

    Palavras-Chave: cobalt 60; cross-linking; gels; nanoparticles; neutron activation analysis; polymers; protozoa; silver; skin diseases; therapeutic uses; transmission electron microscopy

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  • IPEN-DOC 26272

    CORAZZA, FULVIO G. ; PASSOS, PRISCILA de Q.S. ; LIMA, MAYELLE M.P. ; TOMINAGA, FLAVIO K. ; SAKATA, SOLANGE K. ; GONÇALVES, KARINA O.; COURROL, LILIA C.; VIEIRA, DANIEL P. . Synthesis of paramagnetic iron oxide nanoparticles for application in in vitro three-dimensional biological models through gamma radiation and microwave reduction of iron ions. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 2284-2295.

    Abstract: Two-dimensional (2D) cell models are extensively used in biomedical research to evaluate the efficacy and safety of new drugs. However, these conventional approaches do not precisely mimic the complexity of the organ microenvironment. To overcome this obstacle, three-dimensional (3D) spheroid cell structures usually referred to as spheroids are being developed to better represent the morphological and functional similarity to the tissues. Among several techniques currently employed to produce three-dimensional cell cultures, one of the most promising is the magnetic levitation, which consists of the magnetization of the cells through adsorption of magnetic nanoparticles of iron oxide (Fe3O4), which are produced by the reaction of Fe2+ and Fe3+ ions in alkaline medium. This work produced paramagnetic iron oxide nanoparticles (PIONs) by coprecipitation from an Fe2+ source. The reduction to Fe3+ was obtained by the ionization caused by gamma radiation (60Co) at 15 or 30 kGy radiation absorbed doses. After functionalization with poly-lysine, the nanoparticle suspensions were characterized by XRD, FTIR, zeta potential analysis, DLS and TEM which showed the successful attachment of the carboxylate groups to iron, explaining the ability of the particles to be adsorbed by the membranes. Biological assays showed that these PIONs were biocompatible and efficiently could be applied to develop prostate 3D tumor spheroids model for drug screening.

    Palavras-Chave: absorbed radiation doses; biological materials; cell cultures; cobalt 60; gamma radiation; iron ions; iron oxides; nanoparticles; spheroids; x-ray diffraction

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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.