Study of the densification of uranium-erbium system
Carregando...
Data
Data de publicação
2017
Autores IPEN
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
É parte de
60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORS
Exportar
Resumo
The sintering process of UO2-Er2O3 pellets has been investigated because of its
importance in the nuclear industry and the complex behavior during sintering. The
present study includes the development of nuclear fuel for power reactor in order to
increase the efficiency of the fuel trough longer refueling intervals. The erbium is
indicated for longer cycles, which means less stops to refueling and less waste. In this
work, we studied the use of erbium oxide by varying the concentrations in the range
of 1-9.8%, which was added to UO2 powder through mechanical mixing, aiming
to check the rate of densification and a possible sintering blockage. The powders
were pressed and sintered at 1700 C under hydrogen atmosphere. The results show
a sintering blockage in the UO2-Er2O3 system that occurs in the range of 1500-
1700 C temperature. Dilatometric tests indicate a retraction of 21.9% when used
Er2O3 at 1 wt. % concentration. This shrinkage is greater than is observed with
higher concentrations or even without the addition of the burnable poison, providing
us with a better degree of incorporation of the element erbium, resulting in pellets
with density suitable for use as nuclear fuel.
Como referenciar
FREITAS, A.C.; CARVALHO, E.F.U. Study of the densification of uranium-erbium system. In: 60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORS, November 28 - December 01, 2017, São Paulo, SP. Abstract... São Paulo, SP: Instituto de Pesquisas Energéticas e Nucleares, 2017. p. 96-96. Disponível em: http://repositorio.ipen.br/handle/123456789/28796. Acesso em: 20 Mar 2026.
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.