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运用故障树分析方法，对核电站全厂断电事故进行分析。建造了全厂断电事故即厂用电力系统Ａ、Ｂ两列６．６ｋＶ交流应急母线ＬＨＡ和ＬＨＢ同时失电故障树。利用ＳＥＴＳ程序及法国标准９０万千瓦压水堆核电站２００堆年运行经验反馈的可靠性数据，对全厂断电故障树作了定性、定量分析，得到了全厂断电事故的发生概率。给出了全厂断电事故的主要失效模式及发生的概率和事件的重要度。
The fault tree analysis method is used to analyze the power plant blackouts of the whole plant. The whole plant was built power failure accident that the power system A, B two columns 6.6kV AC emergency bus LHA and LHB power failure fault tree. Based on the reliability data of SETS program and the feedback of 200-year operation experience of French standard 900 MW PWR nuclear power plant, the fault-tree of power failure of the whole plant was qualitatively and quantitatively analyzed, and the probability of power failure occurred in the whole plant was obtained. The main failure mode of the whole plant blackout and the probability of occurrence and the importance of the event are given.