核反应堆初次装料过程中堆芯中子计数率监测装置的研制  

Development of in-Core Neutron Fluence Rate Monitoring Device for Nuclear Reactor First Fuel Loading

作　　者：刘洋[1] 何高魁[1] 田华阳[1] 赵江滨[1] LIU Yang;HE Gaokui;TIAN Huayang;ZHAO Jiangbin(China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《同位素》2022年第2期98-103,共6页Journal of Isotopes

摘　　要：为实现核反应堆首次装料及换料过程中的安全控制,研制了核反应堆初次装料监测装置,完成了装置相关机械结构、电气结构设计和制造工作,装置主要包括;He正比计数管探头组件、脉冲计数装置等。其中,探头组件采用新型结构,机械结构采用马笼头结构防水接头、防水屏蔽套筒和承重核测多芯屏蔽电缆组合的形式,探头组件电路结构采用快电荷灵敏前置放大器加高压模块一体化的形式。脉冲计数装置采用机柜、NIM机箱、插件形式,包含四个测量通道和一个声光报警通道,可以实现计数率显示、超阈值声光报警等功能。经实验测试,装置满足核反应堆装料过程中子注量率监测的要求,已经应用于红沿河核电站5、6号机组。To meet the requirements of safety control during the fuel loading and refueling of nuclear reactors,a reactor first loading monitoring system was developed,and the related mechanical structure and electrical structure design and manufacturing of the system were completed including;He proportional probe and pulse counter device,etc.The probe assembly adopts a new structure.The mechanical structure is a combination of a bridle structure waterproof connector,a waterproof tube and a load-bearing multi-core shielded cable.A fast charge sensitive preamplifier and a high-voltage module were integrated in the probe.The pulse counting device consist of several NIM modular plug-in units is mounted on a NIM rack mounting unit and a cabinet.The system contains four measurement channels and an acousto-optic alarm channel,which can realize functions such as counting rate display and over-threshold acousto-optic alarm.The tests show the system meets the requirements for neutron flux rate monitoring during nuclear reactor fuel loading and has been applied to unit 5 and unit 6 of Hongyanhe Nuclear Power Plant.

关 键 词：核反应堆 初次装料 快电荷灵敏前置放大器 

分 类 号：TL811.2[核科学技术—核技术及应用]