核电厂堆外中子测量系统闪发高计数率问题研究

Research on Flashing High Counting Rate of Ex-core Neutron Instrumentation System of Nuclear Power Plant

从故障现象、原因排查和解决措施三个方面,分析了我国核电厂近期发生的堆外中子测量系统闪发高计数率异常中所涉及的电缆接头问题和探头故障问题,提出了核电厂应关注堆外中子测量系统设备制造和安装的质量等建议,为解决和避免类似的堆外中子测量系统闪发高计数率问题提供借鉴。

Several anomalies of flashing high counting rate in ex - core neutron instrumentation system occurred recently in some new nuclear power plants in China. As reasons of these anomalies, the cable connector prob- lems and detector failure problems are analyzed from aspects of fault phenomenon, cause examination, and solutions. Concerns on the manufacture and installation of ex - core neutron instrumentation equipment should be raised by nuclear power plants. This paper can be used for reference on solution and avoiding similar issues for other nuclear power plants.