反应堆中子注量率相对分布测量装置中多通道放大甄别器研制  

Development of Multi-channel Amplifier-discriminator Based on Measurement System of Neutron Fluence Rate Relative Distribution in Reactor

作　　者：赵艳辉[1] 刘丽艳[2] 黄顺[3] 刘才学[4] 踪训成[4] 赵修良[2] 

机构地区：[1]南华大学电气工程学院,湖南衡阳421001 [2]南华大学核科学技术学院,湖南衡阳421001 [3]衡阳师范学院物理与电子信息科学系,湖南衡阳421008 [4]中国核动力研究设计院,四川成都610041

出　　处：《原子能科学技术》2014年第2期347-351,共5页Atomic Energy Science and Technology

基　　金：中国核动力研究设计院委托项目资助;湖南省科技厅计划项目资助(2011GK3198);衡阳市科技计划项目资助(2012KG73)

摘　　要：为了测量反应堆内中子注量率分布，保证反应堆内活化55 M n-58 Ni合金探测片γ计数测量的可靠性，本文研制了中子注量率分布测量装置中9通道放大甄别器。多通道放大甄别器性能指标测试与应用测试结果表明：每个通道放大器增益1～21连续可调、甄别器阈值独立连续可调，具有最大计数率高、灵敏度高、稳定性好、系统抗串扰能力强等优点；放大器增益长期稳定性≤1％，甄别器最小输入脉冲宽度≥0.1μs ，甄别器最大计数率≤4×106 s-1，能用于实时长期稳定测量反应堆内中子注量率分布。For the measurement of neutron fluence rate in reactor and reliable assurance of γcount measurement of activated 55 M n-58 Ni alloy irradiated foils in reactor ,9-channel amplifier-discriminator was developed . The main technical parameter test and application test show that the gain of each channel amplifier-discriminator is continuously adjustable from 1 to 21 , the threshold of each discriminator circuit is continuously adjustable ,the maximum count rate and sensitivity of discriminator circuit are high , and the system has stable property and excellent anti-interference . In conclusion ,relevant technical parameters can guarantee the real-time and long-term stable measurement of neutron fluence rate relative distribution in reactor , with the technical parameters that gain stability of amplifier is less than 1% ,the minimum input pulse width of discriminator circuit is greater than 0.1 μs ,and the maximum count rate of discriminator is less than 4 × 106 s-1 .

关 键 词：中子注量率 放大甄别器 放大器增益 最小输入脉冲宽度 最大计数率 

分 类 号：TL37[核科学技术—核技术及应用]