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低温時反応度事故模擬試験における過渡ボイド挙動,2

Transient void behavior in simulation tests for cold shutdown reactivity initiated accidents, 2

佐藤 聡 ; 丸山 結 ; 浅香 英明*; 中村 秀夫  

Satou, Akira; Maruyama, Yu; Asaka, Hideaki*; Nakamura, Hideo

単一模擬燃料棒体系及び2$$times$$2バンドル体系下において低温時反応度事故の熱水力条件を模擬した過渡ボイド挙動試験を実施した。両体系においてそれぞれ加熱等価直径の異なる二種類の試験体を用い、ボイド率の過渡変化に及ぼす加熱等価直径の影響が小さいことを明らかにした。

Simulation tests for cold shutdown reactivity initiated accidents were conducted in single-rod and 2$$times$$2 bundle systems. Transient void behavior was measured using two kinds of test sections different in thermal equivalent diameter for each systems. It has been found that the thermal equivalent diameter was not a dominant factor for the transient characteristics of void fraction.

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