γ剂量率监测系统就地处理箱静电计模块设计

Design of Electrometer Module for γ Dose-Rate Monitor System Local Processing Box

γ剂量率监测系统主要用于监测核电站失水事故或冷却剂意外泄漏时γ辐射吸收剂量率.由于运用场合的特殊性和复杂性,且开发技术难度大,目前国内核电站都依赖进口.如何打破国外技术垄断,实现该设备国产化是一个值得研究的问题.就地处理箱为γ剂量率监测系统探测器提供工作电压和信号处理,而静电计模块是就地处理箱的核心部件.提出电流-频率(I-F)与电压-频率(V-F)组合方式,以及电流-电压(I-V)与V-F组合方式.通过对比这两种静电计模块设计方案,并结合多次设计与试验验证经验,给出各自的优缺点和关键技术设计方法,对于产品研发和电子元器件选型具有一定的指导意义.

Theγdose-rate monitor system is mainly used to monitor the absorbed dose rate ofγradiation in the loss of coolant accident or coolant leakage accident of nuclear power plant.Because of the particularity and complexity of the application situation,and the difficulty of developing technology,domestic nuclear power plants rely on imports at present.How to break the technology monopoly of foreign countries and realize the localization of the equipment is a problem worthy of study.The local processing box provides working voltage and signal processing for the detector ofγdose-rate monitor system,and the electrometer module is the core component of the local processing box.The combination of current-frequency(I-F)and voltage-frequency(V-F),and the combination of current-voltage(I-V)and V-F are put forward.By comparing the two kinds of electrometer module design schemes,and combining with the experience of design and test verification for many times,the advantages,disadvantages and key technology design methods are given,which have a certain guiding significance for product research and development and selection of electronic components.