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Thermal conductivities of Cs-$$M$$-O ($$M$$ = Mo or U) ternary compounds

セシウム三元系化合物の熱伝導率

徳島 ニ之*; 田中 康介; 黒崎 健*; 儀間 大充*; 牟田 浩明*; 宇埜 正美*; 山中 伸介*

Tokushima, Kazuyuki*; Tanaka, Kosuke; Kurosaki, Ken*; Gima, Hiromichi*; Muta, Hiroaki*; Uno, Masayoshi*; Yamanaka, Shinsuke*

ホットプレス及び放電プラズマ焼結(SPS)により製造したCs$$_{2}$$MoO$$_{4}$$及びCs$$_{2}$$UO$$_{4}$$の熱伝導率を測定した。その結果、これらの熱伝導率はUO$$_{2}$$及びMOX燃料に比べ低い値となることがわかった。

The thermal diffusivities of Cs$$_{2}$$MoO$$_{4}$$ and Cs$$_{2}$$UO$$_{4}$$ using samples fabricated by hot press and SPS techniques were measured by a laser flash method in the range from room temperature to 823 K for Cs$$_{2}$$MoO$$_{4}$$ and to 900 K for Cs$$_{2}$$UO$$_{4}$$. The thermal conductivities of these cesium ternary oxides were quite low compared with UO$$_{2}$$ and MOX fuel. This is consistent with previous findings. These results would be useful for evaluating the thermal performance of MOX fuels at the high burn-up region in the fast reactors.

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