第34卷第4期 2014年
12月
核科学与工程
Nuclear Science and Engineering
Vol.34No.4
Dec.2014
RPN系统中间量程切换共模缺陷的处理与分析
徐建飞，张树山，肖宇，郊立鹅(中广核工程有限公司调试中心，广东深圳518124)）
摘要：介绍了某核电项目机组在零功率平台调试期间，由于核测量仪表中间量程切换问题导致反应堆跳堆事件的经过，并对根本原因进行深人的分析，经过大量的试验，发现量程切换缺陷致使反应堆在启停堆阶段保护误动概率高达3%。通过根本原因分析，确定此缺陷为同系设备的共模故障。利用RPN系统本身特点采取了针对性的处理措施并在两台国内机组经过充分的验证，修改方案全面可靠，此经验已
反馈到国内外其他应用同类设备的机组。关键调：核电站；RPN；共模；量程切换
中图分类号：TL36
文章标志码：A
文章编号：0258-0918(2014)04-0573-04
DisposalandAnalysisforRangeSwitchDefectof RPNIntermediateRange
XU Jian-fei,ZHANG Shu-shan,XIAO Yu,PI Li-peng
(China Nuclear Power Engineering Company, Shenzhen of Guangdong Prov. , 518124)
Abstract: The paper introduces the reactor trip of certain nuclear power plant caused by RPN intermediate range switch defect, when the reactor is commissioned at o%FP power level. The in-depth analysis and lots of test are carried out after the incident, through which we find out that some common faults increase the probability of reactor protection malfunction by up to 3%. Corrective action is carried out by using the characteristics of RPN system itself. The solution is comprehensive and reliable after full validation in two domestic nuclear power plants. The conclusion is shared with other domestic and foreign nuclear power plants with the same type of equipment
Keywords:nuclear power plant;nuclear instrumentation system (RPN); common cause; range switch
随着科技的进步，RPN系统在不断升
级，但是改进的不成熟性往往隐藏着新的问题。本文就RPN系统技术改造导致的反应堆启停堆阶段反应堆保护误动概率升高问题进行分
收稿日期：2014-03-27；修回日期：2014-10-28
析，通过故障预想、高量级重复验证等手段，对 RPN中间量程导致跳堆问题的根本原因进行分析，并利用系统本身特性参数加以解决，纠正国内外应用同类设备机组的共模缺陷。
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