作者：刘馨¹, 张国庆², 周晓剑³, 王笑非¹, 袁雪岚¹, 高晓燕¹, 王磊¹

作者单位：1. 成都理工大学核技术与自动化工程学院，四川 成都 610059;
2. 中广核工程有限公司，广东 深圳 518124;
3. 生态环境部核与辐射安全中心，北京 100082

关键词：辐射防护技术;动态平衡监测;蒙特卡洛模拟;空气中¹³¹I

摘要：

在对病人的诊疗过程中，挥发到空气中的¹³¹I会对医务人员造成吸入性内照射。因此，该文设计一种空气中¹³¹I动态平衡监测方法，利用蒙特卡罗模拟软件建立测量模型及本底环境模型，模拟计算测量系统对空气中¹³¹I最小可探测活度浓度，并对其进行分析。模拟计算结果表明，空气中¹³¹I动态平衡监测方法可以应用于空气中¹³¹I的连续动态监测，相对于“累积采样监测方法”免去定期更换碘盒或滤纸等维护操作，有助于实现无人值守连续监测和降低运维成本。

Simulation study of dynamic balanced monitoring method for ¹³¹I in the air
LIU Xin¹, ZHANG Guoqing², ZHOU Xiaojian³, WANG Xiaofei¹, YUAN Xuelan¹, GAO Xiaoyan¹, WANG Lei¹
1. College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu 610059, China;
2. China Nuclear Power Engineering Co.,Ltd,Shenzhen 518124, China;
3. Nuclear and Radiation Safety Center, Beijing 100082, China
Abstract: During diagnosis and treatment for patients, ¹³¹I in the air can lead to the inhalation internal exposure to medical staffs. So a dynamic balanced monitoring method for ¹³¹I in the air was proposed, the measurement model and the environment background model were established by Monte Carlo simulation software, and the detection efficiency and the minimum detectable specific activity of the measurement system for ¹³¹I in the air were calculated. The results of simulation show that dynamic balanced monitoring method for ¹³¹I in the air can be applied to the continuous dynamic monitoring for ¹³¹I in air. Compared with “accumulative sampling monitoring method”, dynamic balanced monitoring method for ¹³¹I in the air does not require periodic replacement of iodine cartridges or filter paper, which is helpful to realize unattended continuous monitoring and reduce the cost of operation and maintenance.
Keywords: radiation protection technology;dynamic balanced monitoring;Monte Carlo simulation;¹³¹I in the air
2020, 46(8):39-43  收稿日期: 2019-08-12;收到修改稿日期: 2019-12-11
基金项目: 国家自然科学基金面上项目（41874121）；四川省科技计划项目（2018JY01881）
作者简介: 刘馨（1995-），女，四川成都市人，硕士研究生，专业方向为辐射防护与环境保护
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