Oxygen potentials, oxygen diffusion coefficients and defect equilibria of nonstoichiometric (U,Pu)O $_{2pm x}$

Kato, Masato ; Watanabe, Masashi ; Matsumoto, Taku; Hirooka, Shun ; Akashi, Masatoshi

Oxygen potential of (U,Pu)O $_{2pm x}$ was evaluated based on defect chemistry using an updated experimental data set. The relationship between oxygen partial pressure and deviation in (U,Pu)O $_{2pm x}$ was analyzed, and equilibrium constants of defect formation were determined as functions of Pu content and temperature. Brouwer's diagrams were constructed using the determined equilibrium constants, and a relational equation to determine O/M ratio was derived as functions of O/M ratio, Pu content and temperature. In addition, relationship between oxygen potential and oxygen diffusion coefficients were described.

Language	:	English
Journal	:	Journal of Nuclear Materials
Volume	:	487
Number	:
Pages	:	p.424 - 432
Publication Year/Month	:	2017/04
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Paper URL	:	https://doi.org/10.1016/j.jnucmat.2017.01.056
DOI for research data	:
Keywords	:	MOX燃料; 基礎物性; 酸素ポテンシャル
Research Facility	:	FMF(照射燃料集合体試験施設) ;プルトニウム燃料製造施設
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Article of JAEA R&D Review	:
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InCites™	:	Percentile:75.51 Category:Materials Science, Multidisciplinary
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Registration No. : AA20160477
JAEA Abstracts No. : 46000940
Paper Submission No. : 20508

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