Thermal properties and defect chemistry in nonstoichiometric (U,Pu)O $_{2}$

Kato, Masato

Urania-plutonia solid solution is chemically stable compound in both region of hyper- and hypo-stoichiometry, which has been developed as fuels of sodium-cooled fast reactors. In this work, oxygen potential data of (U,Pu)O $_{2}$ were evaluated based on defect chemistry. And relationship with other thermal properties was described with using the point defect evaluation result. Brouwer diagram of UO $_{2}$ , PuO $_{2}$ and (U,Pu)O $_{2}$ were illustrated from the oxygen potential data. Relational equations to describe O/M ratio and defect concentrations were derived from Brouwer diagram. Relationship between oxygen potential and other thermal properties was evaluated.

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	:	MOX燃料; 熱物性
Research Facility	:	FMF(照射燃料集合体試験施設)
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Registration No. : BB20160308
JAEA Abstracts No. :
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