考虑多失效行为的核电厂可修系统可靠性数值仿真

摘要

To analyze the reliability of safety system having multi‐failure behavior ,such as sequence‐,redundancy‐ and function‐dependent failure behaviors ,in nuclear power plant ,a dynamic fault tree model based on numerical simulation approach was proposed in this paper .It is implemented to analyze the reliability of safety system having multi‐failure behavior in nuclear power reactor through randomly simulating the multi‐failure behavior of component and judging the success rule of dynamic logic gate .T he results of the case study indicate the proposed method is applicable for evaluating the reliability of complicated system with multi‐failure behavior ,and offers great generality .%为分析含有顺序、冗余及功能相关等多失效行为的核电厂安全系统的可靠性，提出了基于动态故障树模型的可靠性数值仿真方法。通过对部件多失效行为的随机模拟及动态逻辑门成功准则的判定，实现了对含有多失效行为的核电厂安全系统的可靠性数值模拟。案例分析结果表明，该方法能对多失效行为的复杂系统进行可靠性分析，具有较强的适应性。