防城港核电站堆内中子通量测量系统指套管碰磨分析

发布时间：2018-04-27 23:30

本文选题：核电站 + 堆内中子通量测量系统　；参考：《核科学与工程》2017年05期

【摘要】：防城港核电站1号机组主泵惰走试验期间,在对核电站松脱部件和振动监测系统13路加速度通道进行背景噪声例行检查时发现,通过松脱部件和振动监测系统的声音监听设备监测到,安装于反应堆压力容器底部堆内中子通量测量系统导向管上通道有"哒哒哒"的异常信号。为找出异常信号源,利用松脱部件监测系统声监测功能对压力容器底部监测到的异常信号进行分析,该信号不是由松脱部件产生的信号。通过听音棒的辅助监听,最后综合分析得出该信号是由堆内中子通量测量系统指套管在管道路径上碰磨引起。该事件的分析与解决,不仅解决了工程建设需要,对核安全局批准下一步工作开展提供了支持依据,而且对通过松脱部件监测系统来开展由于流致振动引起的中子通量测量系统指套管异常振动诊断有重大的实用价值。
[Abstract]:During the main pump idle walk test of unit 1 of Fangchenggang Nuclear Power Station, it was found that during the routine background noise inspection of the loose parts of the nuclear power station and the 13 acceleration channels of the vibration monitoring system, By means of the loose parts and the sound monitoring equipment of the vibration monitoring system, the abnormal signals of "da-da" were detected in the channel of the neutron flux measurement system in the reactor pressure vessel bottom reactor. In order to find out the abnormal signal source, the acoustic monitoring function of the loose part monitoring system is used to analyze the abnormal signal at the bottom of the pressure vessel, which is not the signal generated by the loose part. Through the auxiliary monitoring of the listening rod, it is concluded that the signal is caused by the inner neutron flux measurement system, which means the casing is rubbed on the pipeline path. The analysis and resolution of the incident not only solved the project construction needs, but also provided the support basis for the NSB to approve the next work. Moreover, it is of great practical value to diagnose the abnormal vibration of casing through the monitoring system of loose parts to carry out the neutron flux measurement system caused by fluid-induced vibration.
【作者单位】：中国核动力研究设计院;广西防城港核电有限公司;福建福清核电有限公司;
【分类号】：TM623

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