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模擬FP及び不純物含有MOXの熱伝導率測定

The Measurement of thermal conductivity of MOX including simulated FPs and impurities

堀井 雄太 ; 廣岡 瞬 ; 加藤 正人   ; 宇野 弘樹*; 小笠原 誠洋*; 田村 哲也*; 山田 忠久*; 奥村 和之

Horii, Yuta; Hirooka, Shun; Kato, Masato; Uno, Hiroki*; Ogasawara, Masahiro*; Tamura, Tetsuya*; Yamada, Tadahisa*; Okumura, Kazuyuki

低除染燃料ペレットの熱物性研究の一環として、添加元素によるMOXの熱伝導率への影響について評価した。MOXに固溶するFPであるSm$$_{2}$$O$$_{3}$$及びNd$$_{2}$$O$$_{3}$$を添加した結果、熱伝導率は低下した。一方、燃料製造工程等で混入する不純物元素でありMOXに固溶しないAl$$_{2}$$O$$_{3}$$及びSiO$$_{2}$$を添加した結果、熱伝導率は上昇した。

As part of studies on physical properties of low-decontaminated fuel pellets, simulated FPs (Sm$$_{2}$$O$$_{3}$$ and Nd$$_{2}$$O$$_{3}$$) and impurities included at such as fuel fabrication process (Al$$_{2}$$O$$_{3}$$ and SiO$$_{2}$$) were added to MOX, and their effects on thermal conductivity were evaluated. Addition of Sm$$_{2}$$O$$_{3}$$ and Nd$$_{2}$$O$$_{3}$$ in MOX, that can be solutionized, decreased thermal conductivity whereas addition of Al$$_{2}$$O$$_{3}$$ and SiO$$_{2}$$, that don't make a solid solution with MOX, increased thermal conductivity.

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