核动力装置无线传感器抗辐照屏蔽设计和验证  

Design and Verification of Radiation Shielding for Wireless Sensors in Nuclear Power Plants

作　　者：邓志光 吴茜 吕鑫 朱毖微 王雪梅 徐思捷 董晨龙 向美琼 DENG Zhiguang;WU Qian;LYU Xin;ZHU Biwei;WANG Xuemei;XU Sijie;DONG Chenlong;XIANG Meiqiong(National Key Laboratory of Science and Technology on Reactor System Design Technology,Chengdu 610213,China)

机构地区：[1]核反应堆系统设计技术重点试验室,四川成都610213

出　　处：《自动化仪表》2022年第2期12-17,共6页Process Automation Instrumentation

摘　　要：无线传感器网络作为一种分布式无线网络系统,应用于核环境中,可以减少监测系统电缆布线工作量、降低核环境中装置使用和维护中电缆老化和端接故障带来的影响,有助于核环境中装置自动化、信息化水平的提升和设备的集成化、小型化。但其应用也面临强射线及中子辐照、射频和电磁干扰严重等特殊复杂核环境的制约。针对核环境中的γ辐射,通过屏蔽材料性能分析、蒙特卡罗N粒子程序模拟、屏蔽结构设计及布局,得到了核动力装置中所用无线传感器及网关抗辐射屏蔽加固的合适厚度及整体结构;通过辐照试验,验证了所设计的抗辐照屏蔽体至少能够承受500 Gy的累积辐照剂量。该研究为后续智能仪表的辐照屏蔽设计奠定了设计基础。As a distributed wireless network system,wireless sensor network is applied in a nuclear environment,which can reduce the workload of monitoring system cable wiring,reduce the impact of cable aging and termination failure in the use and maintenance of devices in the nuclear environment,and help the improvement of equipment automation,informatization and the integration and miniaturization of equipment in the nuclear environment.However,its application is also restricted by special and complex nuclear environment,such as strong ray and neutron irradiation,serious radio frequency and electromagnetic interference.Aiming at theγradiation in the nuclear environment,through shielding material performance analysis,Monte Carlo N particle(MCNP)program simulation,shielding structure design and layout,the appropriate thickness and overall structure of the radiation shielding reinforcement for the wireless sensors and gateways used in the nuclear power plant are obtained.Through the radiation test,it is verified that the designed anti-radiation shield can withstand at least 500 Gy cumulative radiation dose.This research provides a design basis for the subsequent radiation shielding design of smart meters.

关 键 词：核动力装置 无线传感器 Γ辐射 蒙特卡罗N粒子程序模拟 抗辐射屏蔽 屏蔽材料性能分析 试验验证 

分 类 号：TH86[机械工程—仪器科学与技术]