Production of uranium tetrafluoride from the effluent generated in the reconversion via ammonium uranyl carbonate
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2017
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Nuclear Engineering and Technology
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Uranium tetrafluoride (UF4) is the most used nuclear material for producing metallic uranium by
reduction with Ca or Mg. Metallic uranium is a raw material for the manufacture of uranium silicide,
U3Si2, which is the most suitable uranium compound for use as nuclear fuel for research reactors. By
contrast, ammonium uranyl carbonate is a traditional uranium compound used for manufacturing uranium
dioxide UO2 fuel for nuclear power reactors or U3O8-Al dispersion fuel for nuclear research reactors.
This work describes a procedure for recovering uranium and ammonium fluoride (NH4F) from a
liquid residue generated during the production routine of ammonium uranyl carbonate, ending with UF4
as a final product. The residue, consisting of a solution containing high concentrations of ammonium
(NH4
þ), fluoride (F ), and carbonate (CO3 2 ), has significant concentrations of uranium as UO2 2þ. From this
residue, the proposed procedure consists of precipitating ammonium peroxide fluorouranate (APOFU)
and NH4F, while recovering the major part of uranium. Further, the remaining solution is concentrated by
heating, and ammonium bifluoride (NH4HF2) is precipitated. As a final step, NH4HF2 is added to UO2,
inducing fluoridation and decomposition, resulting in UF4 with adequate properties for metallic uranium
manufacture.
Como referenciar
SILVA NETO, JOAO B.; CARVALHO, ELITA F.U. de; GARCIA, RAFAEL H.L.; SALIBA-SILVA, ADONIS M.; RIELLA, HUMBERTO G.; DURAZZO, MICHELANGELO. Production of uranium tetrafluoride from the effluent generated in the reconversion via ammonium uranyl carbonate. Nuclear Engineering and Technology, v. 49, n. 8, p. 1711-1716, 2017. DOI: 10.1016/j.net.2017.07.019. Disponível em: http://repositorio.ipen.br/handle/123456789/28521. Acesso em: 21 Feb 2025.
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.