通过辐射监测典型仪表校验数据收集和统计分析,以γ剂量率监测仪GIM204为例,采用经验反馈法论证延长仪表校验周期的可行性,以适应田湾核电站换料长周期方案的实施。研究表明,将GIM204的校验周期由原来的1 a延长到1.5 a,校验相对误差不会超出允许值,满足换料周期延长要求。 By radiation monitoring typical instrument calibration data collection and statistical analysis, the γ dose rate monitor GIM204 is taken as an example, the feasibility of extending the verification period of the instrument is demonstrated by the empirical feedback method to adapt to the implementation of the long-term program of refueling in Tianwan Nuclear Power Station. The research shows that extending the calibration period of GIM204 from 1.5 years to 1.5 years, the relative error of calibration will not exceed the allowable value to meet the renewal requirement of the refueling cycle.