熔融液滴与水作用细粒化实验研究

Experiment on Fragmentation of Melt Drop Interacted with Water

针对核反应堆发生严重堆芯熔化事故时可能发生的燃料与冷却剂的相互作用以及蒸汽爆炸的复杂过程,对高温熔融金属液滴与水作用的细粒化过程进行了实验研究。对不同工况下实验产物的形状进行了比较分析,并对熔融液滴初始温度、水温、下落高度及材料物性对细粒化过程的影响进行了研究。本文还采用高速摄像仪对熔融液滴的细粒化过程进行了观测。结果表明:熔融液滴初始温度、水温和材料物性对细粒化程度的影响较大;本实验参数范围内下落高度对细粒化程度的影响不大。

In order to understand the complicated fuel-coolant interaction and steam explosion during severe accident of nuclear reastors, the fragmentation process of high temperature molten metal drop interacted with water is investigated by experiment. The influences of initial temperature of melt drop, the temperature of water, the release distance of melt drop and the property of the materials are analyzed by comparing the appearance of the debris generated during interaction. The fragmentation process of melt drop is observed by high-speed camera. The results show that the initial temperature of melt drop, the temperature of water and the property of the materials are sensitive parameters for the fragmentation, but the release distance of melt drop is not an important parameter under the conditions of this experiment.