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Claubia Pereira Bezerra Limahttp://lattes.cnpq.br/1635197498453054Antonella Lombardi CostaRochkhudson Batista de FariaGlaucia Danielle LeirosePatrícia Amélia de Lima Reishttp://lattes.cnpq.br/6944638943582061Isabella Rezende Magalhães2021-03-19T17:37:05Z2021-03-19T17:37:05Z2020-03-05http://hdl.handle.net/1843/35299O objetivo deste trabalho é avaliar a viabilidade de substituição do revestimento atual, Zircaloy-4, por materiais considerados, Accident Tolerant Fuels (ATFs), em particular as ligas a base de FeCrAl. A princípio foram caracterizados compósitos de carbeto de silício e ligas metálicas a base de ferro, cromo e alumínio. Posteriormente foram comparadas quatro diferentes ligas a base de ferro com diferentes teores de cromo e alumínio além de acréscimos de outros elementos em menores teores. A comparação foi feita considerando a densidade, expansão térmica, condutividade térmica e calor específico. Essas mesmas características foram utilizadas para estabelecer um comparativo entre as ligas de FeCrAl e o Zircaloy-4. Também foi feita uma análise comparativa entre os mesmos considerando o comportamento térmico dos materiais. Para tanto foram utilizados dados obtidos por meio de simulações utilizando o código RELAP5-3D no qual foi utilizada a nodalização baseada nos dados do FSAR de ANGRA II e as propriedades térmicas obtidas neste trabalho. As simulações foram feitas no estado estacionário e no estado transitório Loss of Flow Accident - LOFA. As propriedades físico-químicas foram utilizadas para interpretar o comportamento térmico. As ligas a base de FeCrAl apresentaram comportamento físico-químico e térmico semelhantes e em certas propriedades apresentaram vantagens em relação ao Zircaloy-4. Foi possível concluir que mesmo em baixos teores, a adição de outros elementos causa mudanças nas propriedades térmicas do material. Por meio do estudo executado foi possível avaliar a viabilidade de acordo com as características das quatro ligas a base de FeCrAl estudadas para a substituição do Zircaloy-4; as ligas propostas foram consideradas promissoras enquanto substitutas do revestimento atual.In order to increase safety for energy production in nuclear power reactors of the LWR type, new claddings, more efficient than the current one in terms of resistance to oxidation and chemical stability, are studied. In order to gather materials with these characteristics, the class of Accident Tolerant Fuel - ATF was created. The proposals are to replace the cladding or fuel pellet. The objective of this work is to evaluate the feasibility of replacing the current cladding, Zircaloy-4, with materials considered ATFs. Initially, composites of silicon carbide and metallic alloys based on iron, chromium and aluminum were characterized. Subsequently, 4 different iron-based alloys with different levels of chromium and aluminum were compared, as well as additions of other elements in lower levels. The comparison was made considering density, thermal expansion, thermal conductivity and specific heat. These same characteristics were used to establish a comparison between FeCrAl and Zircaloy-4 alloys. A comparative analysis was also carried out between FeCrAl and Zircaloy-4 alloys considering the thermal behavior of the materials. For this purpose, data obtained through simulations using the RELAP5-3D code were used, in which nodalization based on ANGRA II FSAR. The simulations were carried in steady state and in transient state of the Loss of Flow Accident - LOFA to evaluate the thermal behavior of the cladding and the fuel pellet. The physical-chemical properties were used to interpret the thermal behavior. The FeCrAl alloys presented similar results. Furthermore, it was possible to conclude that even at low levels the addition of other elements causes changes in the thermal properties of the material, in the case of FeCrAl alloys, compositions that also contained molybdenum, silicon and yttrium were studied. Through the study was possible to evaluate the viability for replace Zircaloy-4 by any of the 4 alloys proposed in the work because there are notable similarities in the behavior of the materials, the alloys presented promising results to replace the traditional material.CNPq - Conselho Nacional de Desenvolvimento Científico e TecnológicoFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas GeraisCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorporUniversidade Federal de Minas GeraisPrograma de Pós-Graduação em Ciências e Técnicas NuclearesUFMGBrasilENG - DEPARTAMENTO DE ENGENHARIA NUCLEAREngenharia nuclearAnálise térmicaReatores nuclearesLWRATFLigas a base de ferroAvaliações físico-químicasRelap5-3DCromo e alumínioAnálise físico-química e térmica de revestimentos nucleares a base de FeCrAl tolerantes a acidentesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFMGinstname:Universidade Federal de Minas Gerais (UFMG)instacron:UFMGORIGINALIsabella Rezende Magalhães - Dissertação (1).pdfIsabella Rezende Magalhães - Dissertação (1).pdfapplication/pdf1198662https://repositorio.ufmg.br/bitstream/1843/35299/1/Isabella%20Rezende%20Magalh%c3%a3es%20-%20Disserta%c3%a7%c3%a3o%20%281%29.pdf3f4f0404d897b9de610103aee648eb53MD51LICENSElicense.txtlicense.txttext/plain; charset=utf-82119https://repositorio.ufmg.br/bitstream/1843/35299/2/license.txt34badce4be7e31e3adb4575ae96af679MD521843/352992021-03-19 14:37:05.614oai:repositorio.ufmg.br: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Repositório InstitucionalPUBhttps://repositorio.ufmg.br/oaiopendoar:2021-03-19T17:37:05Repositório Institucional da UFMG - Universidade Federal de Minas Gerais (UFMG)false
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