ELITA FONTENELE URANO DE CARVALHO

Resumo

Graduation at QuĆ­mica Industrial from Universidade Federal do CearĆ” (1978), master's at Nuclear Engineering from Universidade de SĆ£o Paulo (1992) and doctorate at Nuclear Engineering from Universidade de SĆ£o Paulo (2004). Has experience in Nuclear Engineering, focusing on Conversion, Enrichment and Manufacture of Nuclear Fuel, acting on the following subjects: combustivel nuclear, fluoreto, tratamento de efluentes, veneno queimavel and meio ambiente. (Text obtained from the CurrĆ­culo Lattes on October 8th 2021)


Possui graduaĆ§Ć£o em QuĆ­mica Industrial pela Universidade Federal do CearĆ” (1978), mestrado em Tecnologia Nuclear pela Universidade de SĆ£o Paulo (1992) e doutorado em Tecnologia Nuclear pela Universidade de SĆ£o Paulo (2004). Pesquisador do Instituto de Pesquisas EnergĆ©ticas e Nucleares da ComissĆ£o Nacional de Energia Nuclear. ExperiĆŖncia na Ć”rea de Engenharia de Materiais e QuĆ­mica com ĆŖnfase em ConversĆ£o, Enriquecimento, FabricaĆ§Ć£o de CombustĆ­vel Nuclear, Tratamento de efluentes radioativos e convencionais e reaproveitamento de resĆ­duos industriais e tĆ©cnicas de caracterizaĆ§Ć£o quĆ­mica de materiais. Membro do Instituto Nacional de Tecnologia- INCT para Reatores Nucleares Inovadores. Autor de capĆ­tulo de livro intitulado "Radioisotopes: Applications in Physical Sciences, 2011 ISBN: 9789533075105. TĆ­tulo do capĆ­tulo: Research Reactor Fuel Fabrication to Produce Radioisotopes. Professor de pĆ³s- graduaĆ§Ć£o da Universidade SĆ£o Paulo nas Ć”reas de caracterizaĆ§Ć£o de materiais e de combustĆ­vel nuclear. Professor visitante na Escola PolitĆ©cnica da Universidade de SĆ£o Paulo - modulo I e II de processamento de combustivel nuclear. Bolsista de Produtividade Desen. Tec. e ExtensĆ£o Inovadora 2 (Texto extraĆ­do do CurrĆ­culo Lattes em 08 out. 2021)

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  • Artigo IPEN-doc 24335
    Analysis of slag formation during UF4 magnesiothermic reduction
    2017 - DURAZZO, MICHELANGELO; SALIBA-SILVA, ADONIS M.; GARCIA, RAFAEL H.L.; CARVALHO, ELITA F.U. de; RIELLA, HUMBERTO G.
    Metallic uranium is a fundamental raw material for producing nuclear fuel elements for research reactors and irradiation targets for producing 99Mo, as U3Si2, UMo alloy, UAlx, and uranium thin foils. Magnesiothermic reduction of UF4 is a possible route in the nuclear fuel cycle for producing uranium as a metal ingot. The main concern about the reducing scale to produce low-enriched (metallic) uranium (LEU) (around 1 kg) is the relatively low yield compared to calciothermic reduction. Nevertheless, the magnesiothermic reduction has the advantages of having lower cost and being a safer method for dealing with uranium processing. The magnesiothermic process, as a batch, is closed inside a sealed crucible. In the present study, in order to have a qualitative idea of the kinetics during the ignition moment, the slag projected over the lateral inner face of the crucible was used to sketch the general magnesiothermic evolution. The methods used were metallographic observation and X-ray diffraction followed by Rietveld refinement. The results of these analyses led to the conception of a general reaction development during the short time between the ignition of the reducing reaction and final settlement of the products. Relevant information from this study led to the conclusion that uranium is not primarily present in the lateral slag projection over the crucible during the reaction, and the temperature level may reach 1500Ā°C or more, after the ignition.