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事件树分析是核电厂概率安全分析中最常用的方法之一,在运用该方法进行定性定量分析时首先需要将模型中的序列/后果链接形成相应的序列/后果故障树,该过程中一般通过边界条件和成功分支处理准则等设置来保证最终故障树达到指定要求。为解决由于复杂边界条件设置导致的最终故障树结构冗余问题,本文提出了一种基于结构重用的事件树复杂边界条件处理方法。经大量实例验证,该方法完全正确,可显著提高概率安全分析软件事件树分析速度,并为核电厂的实时风险分析提供了技术基础。
Event tree analysis is one of the most commonly used methods in NPP. When using this method to conduct qualitative and quantitative analysis, we first need to link the sequence / consequence in the model to the corresponding sequence / consequence fault tree, which usually passes Boundary conditions and successful branch processing guidelines and other settings to ensure that the final fault tree to meet the specified requirements. In order to solve the problem of the final fault tree structure redundancy caused by the complicated boundary condition setting, this paper presents a method based on structure reuse for complex tree boundary condition processing. After a large number of examples, this method is completely correct, which can significantly improve the probability analysis software event tree analysis speed, and provide a technical basis for real-time risk analysis of nuclear power plants.