对CEFR的研究发现,一回路外的钠净化管道或阀门破裂将导致放射性钠火事故发生,其中309/1设备间的泄漏后果最严重。采用概率安全评价技术对该事故进行放射性风险分析,依据钠泄漏及钠火发生后相关系统的响应特性,确立了44个事故序列,建立了事件树-故障树模型。对模型进行定量分析 A study of CEFR found that the rupture of a sodium purge pipe or valve outside the primary loop would result in a radioactive sodium fire accident with the worst-case leakage among the 309/1 equipment. Probabilistic safety assessment technology was used to carry out radioactive risk analysis of the accident. According to the response of sodium leakage and related system after the occurrence of sodium fire, 44 accident sequences were established and an event tree-fault tree model was established. Quantitatively analyze the model