基于MC方法的高放废液玻璃固化厂屏蔽窗辐射屏蔽性能设计研究  

Study on Shielding Design of Shielding Window for High Level Liquid Was te Vitrification Plant Based on Mc Method

作　　者：陈爽 何庆驹 周强 Chen Shuang;He Qingju;Zhou Qiang(CNNC Everclean Co.,Ltd.,Beijing 100037,China;Nuclear Power Institute of China,Chengdu 610041,China;Sichuan Environment Protection Engineering Co.,Ltd.,Guangyuan 621010,China)

机构地区：[1]中核清原环境技术工程有限责任公司,北京100037 [2]中国核动力设计研究院,成都610041 [3]中核四川环保工程有限责任公司,广元621010

出　　处：《核安全》2022年第1期7-12,共6页Nuclear Safety

摘　　要：屏蔽窗是高放废液玻璃固化厂重要的观察设备,安装在热室与操作廊之间的混凝土墙体内,起辐射防护和气密通风隔离作用。为确保厂房运行人员所受的照射剂量控制在电离辐射防护标准的限值内,需要对屏蔽窗的辐射屏蔽性能进行优化设计。本文使用MCNP蒙卡模拟程序,对硼玻璃和铅玻璃两种屏蔽窗进行辐射屏蔽性能的蒙卡模拟研究,计算出能保障运行操作人员职业照射安全的屏蔽窗的相对最优材质及最小厚度,该厚度下的操作廊剂量率满足辐射防护管理规定,可以保障屏蔽窗前工作的运行人员的辐射安全。Shielding window is an important observation equipment for High Level Liquid Waste Vitrification Plant,which installed between hot cell and operation gallery inside concrete wall to perform the role of radiation protection and air tight ventilation isolation.To ensure that the radiation dose which the operator of the plant taken is controlled within the limits of the ionizing radiation protection standard,the shielding effectiveness of shielding window is need to be verified.This article uses the Monte Carlo simulation program MCNP to perform the Monte Carlo simulation study on shielding effectiveness for two shielding windows of boron glass and lead glass,to calculate the relative optimum material and minimum thickness of shielding window which can guarantee the occupational exposure safety of operators.The dose rate of the operating gallery under this thickness meets the requirements of radiation protection management and ensures the radiation safety of the operators working in front of the shielding window.

关 键 词：高放废液 玻璃固化 蒙卡模拟 屏蔽窗 

分 类 号：TL77[核科学技术—辐射防护及环境保护]