Manufacturing low enriched uranium metal by magnesiothermic reduction of UF4

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dc.contributor.authorDURAZZO, M.
dc.contributor.authorSALIBA-SILVA, A.M.
dc.contributor.authorMARTINS, I.C.
dc.contributor.authorCARVALHO, E.F.U. de
dc.contributor.authorRIELLA, H.G.
dc.coverageInternacionalpt_BR
dc.date.accessioned2017-09-15T12:25:10Z
dc.date.available2017-09-15T12:25:10Z
dc.date.issued2017pt_BR
dc.description.abstractThis work presents an experimental description of thermal and physical studies to attain a practical manufacturing process of uranium metal enriched to 20% U235 (LEU – Low Enriched Uranium) by metallothermic reduction of UF4, with nuclear purity, for reduced amounts (1000 g of uranium) and with radioactive safety. Uranium metal is needed to produce nuclear fuel elements based on uranium silicide (intermetallic U3Si2) and irradiation targets to produce Mo99. This process is a part of Brazilian efforts to fabricate the fuel elements for its research reactors, primarily aiming at the production of radioisotopes for nuclear medicine. The magnesiothermic reduction is influenced by variables which are related to the starting material UF4 and the thermal conditions for its reduction. These variables are investigated. The physical arrangement of the crucible/reduction reactor/furnace system and the management of the furnace thermal input in the reduction reactor during the heating were studied. Thermal simulation experiments provided delineation for the reactants’ thermal progress before the ignition of the metalothermic reaction. The heat input to the reduction system has proved to be the main variable that influenced the efficiency of the process. The levels of metallic yield and reproducibility have been improved, making the production process reproductive and economically viable. The typical yield in the production of uranium metal was above 80%. Unrecovered uranium metal is present in the MgF2 slag and can be recovered at the level of 96% yield. The process of recovering the uranium from the slag is also discussed.pt_BR
dc.format.extent874-885pt_BR
dc.identifier.citationDURAZZO, M.; SALIBA-SILVA, A.M.; MARTINS, I.C.; CARVALHO, E.F.U. de; RIELLA, H.G. Manufacturing low enriched uranium metal by magnesiothermic reduction of UF4. <b>Annals of Nuclear Energy</b>, v. 110, p. 874-885, 2017. DOI: <a href="https://dx.doi.org/10.1016/j.anucene.2017.07.033">10.1016/j.anucene.2017.07.033</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/27736.
dc.identifier.doi10.1016/j.anucene.2017.07.033pt_BR
dc.identifier.issn0306-4549pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-0435-6082
dc.identifier.orcidhttps://orcid.org/0000-0001-8542-3827
dc.identifier.orcidhttps://orcid.org/0000-0002-2147-8295
dc.identifier.percentilfi86.36en
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/27736
dc.identifier.vol110pt_BR
dc.relation.ispartofAnnals of Nuclear Energypt_BR
dc.rightsopenAccesspt_BR
dc.subjecturanium
dc.subjectmetals
dc.subjectnuclear fuels
dc.subjectmaterials recovery
dc.subjectenriched uranium
dc.subjectfuels
dc.subjectfabrication
dc.titleManufacturing low enriched uranium metal by magnesiothermic reduction of UF4pt_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorHUMBERTO GRACHER RIELLA
ipen.autorELITA FONTENELE URANO DE CARVALHO
ipen.autorILSON CARLOS MARTINS
ipen.autorADONIS MARCELO SALIBA SILVA
ipen.autorMICHELANGELO DURAZZO
ipen.codigoautor2870
ipen.codigoautor895
ipen.codigoautor720
ipen.codigoautor961
ipen.codigoautor90
ipen.contributor.ipenauthorHUMBERTO GRACHER RIELLA
ipen.contributor.ipenauthorELITA FONTENELE URANO DE CARVALHO
ipen.contributor.ipenauthorILSON CARLOS MARTINS
ipen.contributor.ipenauthorADONIS MARCELO SALIBA SILVA
ipen.contributor.ipenauthorMICHELANGELO DURAZZO
ipen.date.recebimento17-09pt_BR
ipen.identifier.fi1.476pt_BR
ipen.identifier.ipendoc23040pt_BR
ipen.identifier.iwosWoSpt_BR
ipen.range.fi0.001 - 1.499
ipen.range.percentilfi75.00 - 100.00
ipen.type.genreArtigo
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relation.isAuthorOfPublication6596a057-886c-4d04-b5eb-ac1a38eb82a9
relation.isAuthorOfPublication.latestForDiscovery6596a057-886c-4d04-b5eb-ac1a38eb82a9
sigepi.autor.atividadeDURAZZO, M.:90:410:Spt_BR
sigepi.autor.atividadeSALIBA-SILVA, A.M.:961:410:Npt_BR
sigepi.autor.atividadeMARTINS, I.C.:720:410:Npt_BR
sigepi.autor.atividadeCARVALHO, E.F.U. DE:895:410:Npt_BR
sigepi.autor.atividadeRIELLA, H.G.:2870:410:Npt_BR
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