对核电站概率安全分析模型中人因事件的风险重要性进行了讨论。岭澳核电站风险重要的前 5 0个最小割集中 ,包含人因事件的有 2 8个 ,占总堆芯熔化频率的 39.1%。讨论了两个风险重要度 :割集重要度 (Fussell- Vesely im -portance,FV)和风险增加当量 (risk achievem ent worth,RAW)得到的 North Anna核电站单个电站审查中风险重要人因事件特点。FV重要度前 10位人因事件都为事故后人因事件 ;RAW重要度前 10位人因事件中包括发生概率较低的事故前人因事件和发生概率较高的事故后人因事件。提出了可以采取的有效预防和缓解措施 The importance of the risk of human factors in the probabilistic safety analysis model of NPP is discussed. Among the top 50 minimal cut sets that are risky in Ling’ao Nuclear Power Station, there are 28 human factor incidents, accounting for 39.1% of the total core melting frequency. Discusses two key risk profiles: Fussell-Vesely im -portance (FV) and risk achieve m ent worth (RAW) at the North Anna nuclear power plant single power station review of risk important human factors. The top 10 human causes for FV importance are all post-accident human causes; the top 10 human factors for RAW importance include human factors for pre-accident and post-accidental causal events with a lower probability of occurrence. Proposed effective prevention and mitigation measures can be taken