MELCOR 乏燃料水池严重事故计算分析

摘要

A calculation model was established for spent fuel pool (SFP) using MEL‐COR code to study the severe accident phenomena caused by the long term station black‐out (SBO) ,including spent fuel heatup ,zirconium cladding oxidation ,and the injection into SFP to mitigate the severe accident . The results show that the severe accident progression is slow and relates directly with the initial water level in SFP . It is illustrated that the injection into SFP is one of the best mitigated measures for the SFP severe accident .%针对长时间全厂断电（SBO）事故，采用MELCOR程序建立了乏燃料水池的计算分析模型，研究了乏燃料组件加热升温、锆包壳氧化等严重事故现象，并计算了向乏燃料水池注水缓解严重事故的效果。研究表明：乏燃料水池内的严重事故进程相对缓慢，且与乏燃料水池初始水位直接相关；向乏燃料水池注水是缓解乏燃料水池严重事故的有效手段之一。