Thermal and mechanical properties of UO $_{2}$ and PuO $_{2}$

Kato, Masato ; Matsumoto, Taku

Uranium and plutonium mixed oxide is base material for minor actinide (MA)-bearing MOX fuels. It is important to evaluate basic properties of UO $_{2}$ and PuO $_{2}$ as fundamental aspects of MA-bearing MOX fuel development. Especially, heat capacity and thermal conductivity of UO $_{2}$ and PuO $_{2}$ are important data to analyze thermal behaviors depending on Pu content. However, the data of PuO $_{2}$ is limited, and it is difficult to understand the mechanism of temperature dependence on their properties. The (Cv+Cd) of UO $_{2}$ and PuO $_{2}$ is almost same. The analysis results showed that the Schottky term of PuO $_{2}$ is 1.5 times as larger as that of UO $_{2}$ . The thermal conductivity was analyzed by Slack equation. The calculation results showed that the thermal conductivity of PuO $_{2}$ was higher than that of UO $_{2}$ . The relationship between mechanical and thermal properties was described, and the heat capacity and thermal conductivity were analyzed.

Language	:	English
Journal	:	NEA/NSC/R(2015)2 (Internet)
Volume	:
Number	:
Pages	:	p.162 - 167
Publication Year/Month	:	2015/06
Meeting title	:	13th OECD/NEA Information Exchange Meeting on Actinide and Fission Product Partitioning and Transmutation (IEMPT-13)
Held date	:	2014/09
Location (city)	:	Seoul
Location (country)	:	Korea
Patent information	:
PDF	:
Paper URL	:	https://www.oecd-nea.org/science/docs/2015/nsc-r2015-2.pdf#page=174
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	:
Cooperating Institute	:

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Registration No. : BB20140401
JAEA Abstracts No. : 43001519
Paper Submission No. : 16600

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Thermal and mechanical properties of UO and PuO

Thermal and mechanical properties of UO $_{2}$ and PuO $_{2}$