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希薄プルトニウム溶液の反応度温度係数及びボイド係数の温度依存性

Temperature dependence of temperature coefficient and void coefficient of reactivity for dilute plutonium solutions

渡邉 友章 ; 鹿島 陽夫; 山根 祐一 

Watanabe, Tomoaki; Kashima, Takao; Yamane, Yuichi

溶液燃料の沸騰を伴う臨界事故時の核分裂数評価手法の整備のため、希薄プルトニウム溶液体系の反応度温度係数・反応度ボイド係数の温度依存性を解析により調査した。その結果、沸騰時出力の評価精度について、温度依存性の考慮により10%程度の向上が期待できることが分かった。

In order to develop evaluation techniques of the number of nuclear fission for criticality accidents with boiling of solution fuel, temperature dependence of temperature coefficients and void coefficients of reactivity for dilute plutonium solutions is analytically investigated. The results show that evaluation accuracy of the power when solution fuel is boiling is expected to be improved by about 10% by considering the temperature dependence.

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