摘要
设计研制了一套放射性废水实时监测装置,可实时监测核设施排放废水中的放射性核素的种类和浓度。该装置的探测器使用HPGe半导体,通过泵抽取核设施所排放的废水从而实现连续的测量。实验结果表明,该装置对废水测量10min,^(137)Cs的最小可探测活度达0. 4 Bq/L,可快速有效监测到废水中放射性超标事件并给出报警信号。通过实验测量和蒙特卡罗(MC)模拟计算,对该装置的探测效率进行校准,给出了能量范围为50～2 754 keV的探测效率曲线。
An real-time monitoring system for radioactive wastewater was designed to discriminate the type and concentration of the radionuclides discharged from nuclear facilities. An HPGe semiconductor was used as the detector in the system for continuous monitoring by pumping wastewater. The minimum detectable activity for 137 Cs was 0.4 Bq/L after 10 min of measuring wastewater with the system. The system can detect excessive radioactivity in the wastewater and quickly and effectively alert personnel. Based on the experimental measurements and the Monte Carlo simulation, the detection efficiency of the system was calibrated, and an efficiency curve was determined for the energy range from 50 to 2754 keV.
作者
杜广仁
林建勇
杨亚新
DU Guang-ren;LIN Jian-yong;YANG Ya-xin(Geologic Party No. 240,CNNC,Shenyang 110032,China;Geologic Party No. 272,CNNC,Nanjing 211102,China;East China University of Technology,Nanchang 330013,China)
出处
《东华理工大学学报（自然科学版）》
CAS
2019年第1期63-67,100,共6页
Journal of East China University of Technology(Natural Science)
基金
国家自然科学基金项目(41574102)
关键词
放射性废水
实时监测
放射性核素
效率校准
radioactivity in wastewater
on-line monitoring
radionuclide
efficiency calibration
