Thermal conductivities of Cs--O ( = 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CsMoO及びCsUOの熱伝導率を測定した。その結果、これらの熱伝導率はUO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 CsMoO and CsUO 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 CsMoO and to 900 K for CsUO. The thermal conductivities of these cesium ternary oxides were quite low compared with UO 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.