Influences of Am and Np on oxygen potentials of MOX fuels

Nakamichi, Shinya ; Kato, Masato ; Tamura, Tetsuya*

Japan Atomic Energy Agency has developed homogeneous MOX fuels containing minor actinides (MAs) such as Am and Np elements. In this work, particular attention is paid to the influence of small MA addition on oxygen potential of MOX fuels. Oxygen potentials of (Am $_{0.024}$ Pu $_{0.311}$ U $_{0.665}$ )O $_{2-x}$ and (Am $_{0.01}$ Np $_{0.12}$ Pu $_{0.29}$ U $_{0.58}$ )O $_{2-x}$ in the near stoichiometric region were measured at 1473, 1573 and 1623K by thermogravimetry. (Am $_{0.024}$ Pu $_{0.311}$ U $_{0.665}$ )O $_{2-x}$ and (Am $_{0.01}$ Np $_{0.12}$ Pu $_{0.29}$ U $_{0.58}$ )O $_{2-x}$ were slightly higher than those of (Pu $_{0.30}$ U $_{0.70}$ )O $_{2-x}$ . From this work, it was found that oxygen potential of MOX is slightly increased by small Am addition and influence of Np addition on oxygen potential is not significant.

Language	:	English
Journal	:	CALPHAD; Computer Coupling of Phase Diagrams and Thermochemistry
Volume	:	35
Number	:	4
Pages	:	p.648 - 651
Publication Year/Month	:	2011/12
Meeting title	:	3rd World Round Robin Seminar
Held date	:	2010/03
Location (city)	:	Montpellier
Location (country)	:	France
Patent information	:
PDF	:
Paper URL	:	https://doi.org/10.1016/j.calphad.2011.06.002
DOI for research data	:
Keywords	:	no keyword
Research Facility	:	プルトニウム燃料製造施設
Press Release	:
Article of JAEA R&D Review	:
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Registration No. : BB20092724
JAEA Abstracts No. : 40000013
Paper Submission No. : 9934

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