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Thermal expansion measurement of (U,Pu)O$$_{2-x}$$ in oxygen partial pressure-controlled atmosphere

酸素分圧制御雰囲気における(U,Pu)O$$_{2-x}$$の熱膨張率測定

加藤 正人; 生澤 佳久; 砂押 剛雄*; Nelson, A. T.*; McClellan, K. J.*

Kato, Masato; Ikusawa, Yoshihisa; Sunaoshi, Takeo*; Nelson, A. T.*; McClellan, K. J.*

U$$_{0.7}$$Pu$$_{0.3}$$)O$$_{2-x}$$ (x=0, 0.01, 0.02, 0.03)及び(U$$_{0.52}$$Pu$$_{0.48}$$)O$$_{2.00}$$の熱膨張率をディラトメータにより、酸素分圧をコントロールした雰囲気で測定した。酸素分圧は、測定の間O/M比が一定となるように制御された。熱膨張率は、O/M比の低下でわずかに上昇し、測定結果より、酸素ポテンシャルを記述する関係式を作成した。

Thermal expansion of (U$$_{0.7}$$Pu$$_{0.3}$$)O$$_{2-x}$$ (x = 0, 0.01, 0.02, 0.03) and (U$$_{0.52}$$Pu$$_{0.48}$$)O$$_{2.00}$$ was measured with a dilatometer in an oxygen partial pressure-controlled atmosphere. The oxygen partial pressure was controlled to hold a constant oxygen-to-metal ratio in the (U,Pu)O$$_{2-x}$$ during the measurement. Thermal expansion slightly increased with the decrease in oxygen-to-metal ratio. The relationship was derived to describe thermal expansion.

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パーセンタイル:31.55

分野:Materials Science, Multidisciplinary

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