The Effect of Am on oxygen potential of MOX fuel at high temperatures

Matsumoto, Taku; Morimoto, Kyoichi ; Kato, Masato ; Sunaoshi, Takeo*

The oxygen potential of (U $_{0.623}$ Pu $_{0.35}$ Am $_{0.027}$ )O $_{2{pm}x}$ was measured at 1673K, 1773K and 1873K by gas equilibrium method. The oxygen potential of (U $_{0.623}$ Pu $_{0.35}$ Am $_{0.027}$ )O $_{2{pm}x}$ was higher than that of (U $_{0.65}$ Pu $_{0.35}$ )O $_{2{pm}x}$ about 20-35kJ/mol. Then, the relationship between oxygen partial pressure and the x in (U $_{0.623}$ Pu $_{0.35}$ Am $_{0.027}$ )O $_{2{pm}x}$ were analyzed with the defect chemistry. From this method, the oxygen potential of (U $_{0.623}$ Pu $_{0.35}$ Am $_{0.027}$ )O $_{2{pm}x}$ was formulated as a function of O/M ratio and temperature. The calculated results showed a good agreement with the experimental data.

Language	:	English
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Meeting title	:	Nuclear Materials Conference 2016 (NuMat 2016)
Held date	:	2016/11
Location (city)	:	Montpellier
Location (country)	:	France
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Keywords	:	no keyword
Research Facility	:	プルトニウム燃料製造施設
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Registration No. : BB20160129
JAEA Abstracts No. :
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