Effect of Al(OH)3 on the sintering of UO2–Gd2O3 fuel pellets with addition of U3O8 from recycle

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dc.contributor.authorSANTOS, LAURO R. dos
dc.contributor.authorDURAZZO, MICHELANGELO
dc.contributor.authorCARVALHO, ELITA F.U. de
dc.contributor.authorRIELLA, HUMBERTO G.
dc.coverageInternacionalpt_BR
dc.date.accessioned2017-10-09T11:04:45Z
dc.date.available2017-10-09T11:04:45Z
dc.date.issued2017pt_BR
dc.description.abstractThe incorporation of gadolinium as burnable poison directly into nuclear fuel is important for reactivity compensation, which enables longer fuel cycles. The function of the burnable poison fuel is to control the neutron population in the reactor core during its startup and the beginning of the fuel burning cycle to extend the use of the fuel. The implementation of UO2-Gd2O3 poisoned fuel in Brazil has been proposed according to the future requirements established for the Angra-2 nuclear power plant. The UO2 powder used is produced from the Ammonium Uranyl Carbonate (AUC). The incorporation of Gd2O3 powder directly into the AUC-derived UO2 powder by dry mechanical blending is the most attractive process, because of its simplicity. Nevertheless, processing by this method leads to difficulties while obtaining sintered pellets with the minimum required density. The cause of the low densities is the bad sintering behavior of the UO2-Gd2O3 mixed fuel, which shows a blockage in the sintering process that hinders the densification. This effect has been overcome by microdoping of the fuel with small quantities of aluminum. The process for manufacturing the fuel inevitably generates uranium-rich scraps from various sources. This residue is reincorporated into the production process in the form of U3O8 powder additions. The addition of U3O8 also hinders densification in sintering. This study was carried out to investigate the influence of both aluminum and U3O8 additives on the density of fuel pellets after sintering. As the effects of these additives are counterposed, this work studied the combined effect thereof, seeking to find an applicable composition for the production process. The experimental results demonstrated the effectiveness of aluminum, in the form of Al(OH)3, as an additive to promote increase in the densification of the (U,Gd)O2 pellets during sintering, even with high additions of U3O8 recycled from the manufacturing process.pt_BR
dc.format.extent30-39pt_BR
dc.identifier.citationSANTOS, LAURO R. dos; DURAZZO, MICHELANGELO; CARVALHO, ELITA F.U. de; RIELLA, HUMBERTO G. Effect of Al(OH)3 on the sintering of UO2–Gd2O3 fuel pellets with addition of U3O8 from recycle. <b>Journal of Nuclear Materials</b>, v. 493, p. 30-39, 2017. DOI: <a href="https://dx.doi.org/10.1016/j.jnucmat.2017.05.050">10.1016/j.jnucmat.2017.05.050</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/27863.
dc.identifier.doi10.1016/j.jnucmat.2017.05.050pt_BR
dc.identifier.issn0022-3115pt_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.percentilfi78.17en
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/27863
dc.identifier.vol493pt_BR
dc.relation.ispartofJournal of Nuclear Materialspt_BR
dc.rightsopenAccesspt_BR
dc.subjectsintering
dc.subjectgadolinium oxides
dc.subjecturanium oxides
dc.subjectnuclear fuels
dc.subjectfabrication
dc.subjectburnable poisons
dc.subjectaluminium oxides
dc.titleEffect of Al(OH)3 on the sintering of UO2–Gd2O3 fuel pellets with addition of U3O8 from recyclept_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorHUMBERTO GRACHER RIELLA
ipen.autorELITA FONTENELE URANO DE CARVALHO
ipen.autorMICHELANGELO DURAZZO
ipen.autorLAURO ROBERTO DOS SANTOS
ipen.codigoautor2870
ipen.codigoautor895
ipen.codigoautor90
ipen.codigoautor403
ipen.contributor.ipenauthorHUMBERTO GRACHER RIELLA
ipen.contributor.ipenauthorELITA FONTENELE URANO DE CARVALHO
ipen.contributor.ipenauthorMICHELANGELO DURAZZO
ipen.contributor.ipenauthorLAURO ROBERTO DOS SANTOS
ipen.date.recebimento17-10pt_BR
ipen.identifier.fi2.447pt_BR
ipen.identifier.ipendoc23197pt_BR
ipen.identifier.iwosWoSpt_BR
ipen.range.fi1.500 - 2.999
ipen.range.percentilfi75.00 - 100.00
ipen.type.genreArtigo
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relation.isAuthorOfPublication958c70ad-38c8-4a48-88e3-76b6746c6a94
relation.isAuthorOfPublication6596a057-886c-4d04-b5eb-ac1a38eb82a9
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relation.isAuthorOfPublication.latestForDiscoveryb1f922a3-a6c8-4fb6-8ae4-013860c8f24b
sigepi.autor.atividadeSANTOS, LAURO R. DOS:403:410:Spt_BR
sigepi.autor.atividadeDURAZZO, MICHELANGELO:90:410:Npt_BR
sigepi.autor.atividadeCARVALHO, ELITA F.U. DE:895:410:Npt_BR
sigepi.autor.atividadeRIELLA, HUMBERTO G.:2870:410:Npt_BR
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