按照堆外核测系统的设计、制造、运行过程,统计分析我国核电机组堆外核测系统相关运行事件;根据设备故障、程序缺陷、设计缺陷、人因失误和环境失控的分类原则,对上述事件的发生原因进行分类统计;从直接原因和根本原因两个方面总结和归纳每起事件研究堆外核测系统的薄弱环节;总结处理类似事件的原则和经验,提出有针对性的防范措施和相应的防护对策,避免类似事件的重复发生.“,”The related operation events of core neutron instrumentation system were statistically analyzed according to the design,manufacture and operation of the core neutron instrumentation system.The cause analysis was based on the classification principle of equipment failure,program defect,design defect, human error and environment out of control.From direct and fundamental reasons,the weak parts of the core neutron instrumentation system were researched and corresponding protective measures were proposed.In addition,the principles and experiences in dealing with similar events were summed up to avoid duplication of similar events.