针对核电厂反应堆核仪表系统(RPN)源量程通道闪发异常计数,甚至触发停堆等严重制约机组上行的问题,研究闪发成因,给出针对性的改进措施。本文以中国广核集团B核电项目2、3号机组为依托项目,将提炼的良好实践在安装阶段予以实施,经调试启动至商业运行的长期验证,该机组完全未出现任何因RPN源量程闪发异常计数而影响机组上行的重大问题。 In view of the abnormal counting of abnormalities of RPN source range tunnel flashover and even the triggering of shutdown and other serious constraints on unit ascending, the cause of flashover is studied and the targeted improvement measures are given. In this paper, China Nuclear Power Group B nuclear power plant units 2 and 3 as the backing project, refining the good practices in the installation phase to be implemented, commissioned to commercial operation of the long-term verification, the unit did not appear any due to the RPN source range flash Abnormal count and affect the unit up the major issues.