蒸汽爆炸中熔融金属与冷却剂接触特性研究综述

A Review of Contact Characteristics of Molten Metal and Coolant in Steam Explosion

蒸汽爆炸中,压力容器内熔融金属与冷却剂的相互作用被称为FCI(Fuel-Coolant Interaction)现象,过程中产生的巨大压力波会对压力容器造成严重破坏,威胁系统安全。结合FCI不同阶段现象的机理与应用,对金属液滴的水力特性、碎化机理、表面膜态沸腾及蒸汽爆炸等方面进行综合分析,总结压力容器内熔融金属与冷却剂相互作用机理及研究难点。

In steam explosion, the interaction between the molten metal and the coolant in the pressure vessel is called FCI (Fuel-Coolant Interaction) phenomenon, and the huge pressure wave generated in the process will cause serious damage to the pressure vessel and threaten the safety of the system. Combined with the mechanism and application of different stages of FCI, the hydraulic characteristics, fragmentation mechanism, surface film boiling and steam explosion of metal droplets are comprehensively analyzed. The interaction mechanism and research difficulties between molten metal and coolant inside and outside the pressure vessel are discussed.