Characterization of crystalline phases of (U,Er)O2 pellets by X-ray diffraction

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dc.contributor.authorSANSONE, ALBERTO E.S.
dc.contributor.authorRIELLA, HUMBERTO G.
dc.contributor.authorCARVALHO, ELITA F.U. de
dc.coverageInternacionalpt_BR
dc.creator.eventoINTERNATIONAL NUCLEAR ATLANTIC CONFERENCEpt_BR
dc.date.accessioned2018-01-11T12:08:18Z
dc.date.available2018-01-11T12:08:18Z
dc.date.eventoOctober 22-27, 2017pt_BR
dc.description.abstractOptimization of nuclear fuel for use in pressurized water reactors can be achieved by obtaining higher burnups. This, however, requires the excess reactivity caused by increasing the fuel's enrichment to be taken into account, which can be done by introducing burnable absorbers into the UO2 fuel pellets themselves. Some of the rare earth elements have thermal and mechanical properties that make them appropriate for use inside the reactor. In order to characterize the microstructure of erbium-doped UO2 fuel, sintered UO2-Er2O3 pellets were prepared, with Er2O3 content ranging from 1:0 to 9:8wt%, and analyzed by X-ray di raction to determine whether the composite formed solid solutions and, if so, evaluate the lattice parameter as a function of erbia concentration. While XRD analysis showed the Er2O3 completely dissolved in the UO2 powder, it also evidenced the emergence of a second uorite-type phase, whose phase fraction increases and lattice parameter decreases with increasing erbia concentration. Analysis of the di raction patterns showed this emerging phase has the same crystalline structure as the host lattice, but with a smaller lattice parameter, and a smaller domain size. These results are compatible with the phenomenon of defect segregation, which consists in the formation of microdomains with a higher concentration of defects.pt_BR
dc.event.siglaINACpt_BR
dc.identifier.citationSANSONE, ALBERTO E.S.; RIELLA, HUMBERTO G.; CARVALHO, ELITA F.U. de. Characterization of crystalline phases of (U,Er)O2 pellets by X-ray diffraction. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. <b>Proceedings...</b> Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017. Disponível em: http://repositorio.ipen.br/handle/123456789/28286.
dc.identifier.orcidhttps://orcid.org/0000-0001-8542-3827
dc.identifier.orcidhttps://orcid.org/0000-0003-0435-6082
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/28286
dc.localRio de Janeiro, RJpt_BR
dc.local.eventoBelo Horizonte, MGpt_BR
dc.publisherAssociação Brasileira de Energia Nuclearpt_BR
dc.rightsopenAccesspt_BR
dc.subjectcrystal-phase transformations
dc.subjectdoped materials
dc.subjecterbium
dc.subjecterbium
dc.subjectfuel pellets
dc.subjectlattice parameters
dc.subjectnanostructures
dc.subjectnuclear fuels
dc.subjectoptimization
dc.subjecturanium dioxide
dc.titleCharacterization of crystalline phases of (U,Er)O2 pellets by X-ray diffractionpt_BR
dc.typeTexto completo de eventopt_BR
dspace.entity.typePublication
ipen.autorELITA FONTENELE URANO DE CARVALHO
ipen.autorHUMBERTO GRACHER RIELLA
ipen.autorALBERTO ERMANNO DOS SANTOS SANSONE
ipen.codigoautor895
ipen.codigoautor2870
ipen.codigoautor12715
ipen.contributor.ipenauthorELITA FONTENELE URANO DE CARVALHO
ipen.contributor.ipenauthorHUMBERTO GRACHER RIELLA
ipen.contributor.ipenauthorALBERTO ERMANNO DOS SANTOS SANSONE
ipen.date.recebimento18-01pt_BR
ipen.event.datapadronizada2017pt_BR
ipen.identifier.ipendoc24111pt_BR
ipen.notas.internasProceedingspt_BR
ipen.type.genreArtigo
relation.isAuthorOfPublication958c70ad-38c8-4a48-88e3-76b6746c6a94
relation.isAuthorOfPublication12380ddd-f2bc-4fe9-95dd-7e37175bee46
relation.isAuthorOfPublication29859467-9d32-41cf-b82f-346f34cbe9a9
relation.isAuthorOfPublication.latestForDiscovery29859467-9d32-41cf-b82f-346f34cbe9a9
sigepi.autor.atividadeSANSONE, ALBERTO E.S.:12715:410:Spt_BR
sigepi.autor.atividadeRIELLA, HUMBERTO G.:2870:410:Npt_BR
sigepi.autor.atividadeCARVALHO, ELITA F.U. DE:895:410:Npt_BR
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