辐射防护2025，Vol.45Issue(5)：474-481,8.
AP1000蒸汽发生器排污管道γ在线监测装置设计及探测效率分析
Design and detection efficiency analysis on online γ radiation monitoring device for AP1000 steam generator blowdown pipeline
王一霖 1乔有龙 1余小东 1刘维理 2夏三强 3苏昌远3
作者信息
- 1. 山东核电有限公司,山东 海阳 265100
- 2. 国电投核能有限公司,山东 烟台 264000
- 3. 中国辐射防护研究院,太原 030006
- 折叠
摘要
Abstract
In order to ensure that radioactive substances in the external steam supply of AP1000 unit meet the relevant standard requirements,real-time online monitoring of the γ radioactivity in the steam generator blowdown pipeline is carried out.The online γ radiation monitoring device consists of four NaI(Tl)γ spectrometers,an on-site radiation processing unit,and a lead shielding bracket.The simulation results indicate that the detection efficiency of the monitoring device is less affected by the energy of γ rays.By preparing pipelines with different activity concentrations of 137Cs and calibrating the monitoring device,a detection efficiency of 7.96×10-2 was obtained.At a 95％confidence level and a measurement time of 15 seconds,the minimum detectable activity concentration was 2.53×104 Bq/m3.The precision of the monitoring device was 2.86％,and the accuracy was better than±9％,meeting the measurement requirements.关键词
低γ放射性测量/最小可探测活度浓度/管旁在线监测/AP1000Key words
low γ radiation measurement/minimum detectable activity concentration/online monitoring at the management site/AP1000分类
能源科技引用本文复制引用
王一霖,乔有龙,余小东,刘维理,夏三强,苏昌远..AP1000蒸汽发生器排污管道γ在线监测装置设计及探测效率分析[J].辐射防护,2025,45(5):474-481,8.
