Effect of oxygen potential on the sintering behavior of MgO-based heterogeneous fuels containing (Pu,Am)O $_{2-x}$

Miwa, Shuhei ; Ishi, Yohei*; Osaka, Masahiko

The effect of oxygen potential on the sintering behavior of MgO based heterogeneous fuels containing (Pu,Am)O $_{2-x}$ was experimentally investigated. Sintering tests in various atmospheres, i.e. air, moisturized 4%H $_{2}$ -Ar, and 4%H $_{2}$ -Ar atmosphere, were carried out. The sintering behavior was found to be significantly affected by the oxygen potential in the sintering atmosphere. The sintered density decreased with decreasing oxygen potential. The (Pu,Am)O $_{2-x}$ phase sintered in a reductive atmosphere had hypostoichiometry. The aggregates of the (Pu,Am)O $_{2-x}$ phase sintered in the reductive atmosphere grew, in comparison with those in the oxidizing one. The sintering mechanism was discussed in terms of the difference in sintering behavior of (Pu,Am)O $_{2-x}$ and MgO.

Language	:	English
Journal	:	Journal of Nuclear Materials
Volume	:	389
Number	:	3
Pages	:	p.402 - 406
Publication Year/Month	:	2009/06
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Paper URL	:	https://doi.org/10.1016/j.jnucmat.2009.02.016
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Keywords	:	no keyword
Research Facility	:	AGF(照射燃料試験施設)
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Registration No. : AA20080363
JAEA Abstracts No. :
Paper Submission No. : 7496

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