防城港核电厂CPR1000机型氢气火灾风险研究

Hydrogen Fire Risk Analysis on CPR1000 System of Fangchenggang Nuclear Power Plant

摘要: 新世纪以来核力发电得到越来越广泛的使用，核电站在运行过程中会产生和应用到大量氢气，一旦发生氢气火灾极易导致爆炸，将具有极大破坏性。本文通过对中广核防城港核电厂的CPR1000机型进行实地调研分析，运用事故树方法对核电站的危险源特性及危险度层级进行了系统研究。核电厂内部的危险源相对复杂，导致事故树顶上事件发生的最小割集达到945个，最小径集则有4个。进一步利用事故树–层次分析法分析，计算各危险因素权重，发现通风装置和氢气处理系统发生故障对于事故发生概率的影响最大(~10%)。本项工作可望为核电厂的氢气事故防治提供工程参考。

Abstract: Hydrogen is widely used or generated during the nuclear power generation operation, which may bring high damage by hydrogen combustion and explosion. For the purpose of nuclear safety involved with hydrogen, the CPR1000 system of CGNPC (China General Nuclear Power Corporation) was investigated, and a fault tree analysis was performed. The results show that there are 945 minimum and 4 minimum path cut sets that cause events on the top of the hydrogen accident tree. With application of the accident tree-analytic hierarchy process, numerical methods were used to calculate the weight of each factor. The results show that the failure of the ventilation device and the hydrogen treatment system had a greater impact on the accident.