重水堆SDS#1 E通道中子功率读数高自动脱扣分析

Automatic Tripping Analysis of High Neutron Power Reading in SDS#1 E Channel for Heavy Water Reactor

针对近年来发生在CANDU-6型重水堆一号停堆系统E通道,因11个区域中子功率读数高导致自动脱扣问题,介绍了ROPT回路构成和功能。根据案例的产生问题描述,通过空间电磁干扰、ROPT回路接地或屏蔽线异常、ROPT回路的公共电源异常、ROPT回路设备及其逻辑本身异常4个方面,对E通道自动脱扣缺陷原因进行分析,对分析可能原因进行实施行动并评估,对解决该类问题及提高停堆系统的可靠性提供了有益的借鉴。

In view of the problem of automatic trip caused by high neutron power readings in 11 areas in channel e of CANDU-6 heavy water reactor No.1 shutdown system in recent years,the composition and function of ROPT circuit are introduced.According to the problem description of the case,the causes of channel e automatic tripping defects are analyzed from four aspects:space electromagnetic interference,abnormality of ROPT circuit grounding or shielding wire,abnormality of ROPT circuit common power supply,abnormality of ROPT circuit equipment and its logic itself.The possible causes are analyzed,implemented and evaluated,so as to solve these problems and improve the reliability of shutdown system reliability provides a useful reference.