秦山核电厂松动部件监测系统典型误报警事件分析和处理

Typical False Alarm Analysis and Processing of Loose Parts Monitoring System in Qinshan Nuclear Power Plant

松动部件监测系统(LPMS)是核电厂监测一回路中是否有松脱件的基本安全工具,误报警是困扰松动部件监测的一个最重要的问题。为了甄别误报警事件,分析了秦山核电厂运行过程中的典型报警事件数据和工况信息,确认主泵启停过程中的报警、雷雨天气触发的报警、堆顶风机切换触发的报警、主系统在升温升压过程的报警为误报警,并针对这几类典型的误报警给出了解决方案。

Loose parts monitoring system(LPMS) is a basic security tool for monitoring loose parts in primary loop. One of the problems of detecting loose parts is false alarm. In order to identify false alarm events, this paper analyzed the alarm data and working condition and got the conclusion: if the event happened during the process of reactor coolant pump start and stop;event caused by lightning storm;event caused by the switch of fan on top of the reactor vessel;event happened during the temperature and pressure increasing of the reactor, these alarms are false alarms. The solution for these kinds of typical false alarms is given.