多通道中子注量率相对分布测量装置研制

Measurement Device for Multi-Channel Neutron Flux Relative Distribution

为了实现反应堆堆芯中子注量率相对分布的测量,基于NaI探测器测量活化探测片放射性计数来计算相对中子注量率的方法,研制多通道中子注量率相对分布测量装置。该装置由PTMC12数据采集板卡、工控机和MNFDAS控制软件组成,可自动实现循环计数或非循环模式下的定时计数功能,测量结果以数据图形和文件形式保存。测试结果表明,该装置稳定性好,相对偏差在±1%之内,可保证反应堆内中子注量率相对分布实时长期稳定测量的要求。

To realize the relative distribution measurement of neutron flux in reactor core, the measurement device for multi-channel neutron flux relative distribution has been developed, based on the radioactive counting of activated detection slice measured by NaI detector. The measurement device is made up of PTMC12 data-acquisition board, industrial PC and MNFDAS software, which can automatically achieve the timing and counting function in both cyclical and non-cyclical models, meanwhile the measuring results can be saved as both graphic and data files. The test shows that the stability of the measurement device is excellent with relative deviation within 1%, which can guarantee the requirement of real-time and long-term stable measurement of relative distribution measurement of neutron flux in reactor.