秦山二期扩建工程低温超压事故PSA分析

PSA analysis of low temperature over pressure event in nuclear power plant

低温超压事故在电厂停堆期间发生频率较高,并有可能导致堆芯熔化,是停堆工况下一个重要的安全问题。本文对一回路发生低温超压事故进程进行研究和分析,参考相关资料建立事件树,进行定量化计算,得到低温超压事故导致的堆芯损坏频率,并进行简单的结果评价。

Low Temperature Over Pressure event which is a significant safety problem during shutdown state of nuclear power plants has high frequency and might induce core damage.Low Temperature Over Pressure event is studied and analyzed in this paper.Event tree is built along with its associated data,quantificational calculation is also performed.Hence the core damage frequency is obtained,and conclusion is made.