Analysis of slag formation during UF4 magnesiothermic reduction
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2017
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Nuclear Technology
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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 1500°C or more, after the ignition.
Como referenciar
DURAZZO, MICHELANGELO; SALIBA-SILVA, ADONIS M.; GARCIA, RAFAEL H.L.; CARVALHO, ELITA F.U. de; RIELLA, HUMBERTO G. Analysis of slag formation during UF4 magnesiothermic reduction. Nuclear Technology, v. 200, n. 2, p. 170-176, 2017. DOI: 10.1080/00295450.2017.1353870. Disponível em: http://repositorio.ipen.br/handle/123456789/28564. Acesso em: 25 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.