田湾核电站辐射监测仪表校验周期延长的研究

Study on Extension of Calibration Cycle for Radiation Monitoring Instrument in Tianwan Nuclear Power Plant

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。

Based on the collection and statistical analysis of the radiation monitoring instrument calibration data, and taking the typical GIM204 gamma dose rate monitoring device as an example, the feasibility is demonstrated by the experience feedback method, to adapt to the implementation of the refueling scheme for a long period of time in Tianwan nuclear power station. Studies have shown that when the calibration cycle of GIM204 is extended froml year to 1.5 year, the relative calibration error does not exceed the allowable values, and satisfies the requirement on refueling cycle extension.