デブリベッドの沸騰熱伝達特性に関する研究,3; 界熱流束に対する粒子層発熱量および粒子層高さの影響

Study on boiling heat transfer characteristics in debris beds, 3; Effects of volumetric heated rate and bed height on critical heat flux

川上 大良*; 桜田 渓史*; 坂下 弘人*; 小野 綾子 ; 吉田 啓之  

Kawakami, Taira*; Sakurada, Keishi*; Sakashita, Hiroto*; Ono, Ayako; Yoshida, Hiroyuki

過酷事故時の溶融デブリの冷却機構を検討するために、伝熱面上に粒子層を堆積させ発熱密度や粒子層高さが底面での限界熱流束に与える影響を測定するとともに、伝熱面下方からの可視化実験を行った。

The effect of height and density of accumulated particles on the critical heat flux was investigated on the heating surface, where the particles were accumulated, in order to investigate the cooling process of debris under the severe accident. The thermal-hydraulic behavior on the heating surface was visualized from the backsides of heating surface made of glass.