烟羽辐射模拟装置的研制及测试

辐射防护 ›› 2014, Vol. 34 ›› Issue (4): 234-239.

烟羽辐射模拟装置的研制及测试

金成赫, 韦应靖, 王勇, 黄亚雯, 冯梅, 张庆利

中国辐射防护研究院,太原 030006

收稿日期:2013-10-22 出版日期:2014-07-20 发布日期:2025-01-10
作者简介:金成赫(1984—),男,2007年毕业于清华大学核工程与核技术专业,2010年毕业于中国辐射防护研究院辐射防护及环境保护专业,获得硕士学位,研究实习员。 E-mail: newjch@163.com

Development and Test of a Radioactive Plume Simulator

Jin Chenghe, Wei Yingjing, Wang Yong, Huang Yawen, Feng Mei, Zhang Qingli

China Institute for Radiation Protection, Taiyuan 030006

Received:2013-10-22 Online:2014-07-20 Published:2025-01-10

摘要/Abstract

摘要： 环境γ监测设备对小剂量率变化的灵敏度是评价其辐射特性的一项重要指标。本文介绍了一种自行研制的烟羽辐射模拟装置,该装置由¹³⁷Cs放射源及其传动系统、铅屏蔽体、不同厚度的铅衰减环、控制单元等组成。利用蒙特卡罗模拟和G(E)函数法对距离装置放射源3 m、离地面1 m高度处的空气比释动能率进行了计算,由上述两种方法得到的结果相对偏差在5%以内。结果表明,此烟羽辐射模拟装置在装载MBq量级的¹³⁷Cs源时,预计可提供10 nGy/h ～ 50 nGy/h的辐射场,可用于环境γ监测设备对小剂量率变化的灵敏度测试。

关键词: 环境γ监测, 烟羽辐射模拟装置, 小剂量率变化

Abstract: The response to small dose variation is an important performance indicator for environmental γ radiation monitor.This paper introduces a radioactive plume simulator and the test result for its radiation field dose rate. The components of this device include a ¹³⁷Cs source and its transport system, source shieldings, lead attenuators of different thickness, and a controller system. The air Kerma rate at 3 m from the radiation source and 1m above ground was obtained by MC simulation and G(E) function method, and the difference between two method is within 5%.This device can provide a radiation field over the range of 10 nGy/h—50 nGy/h, when loading the MBq grade ¹³⁷Cs radioactive source, can be used to testing the performance of response to small dose rate variation for environmental γ radiation monitor.

Key words: environmental γ radiation monitoring, radioactive plume simulator, small dose rate variation

中图分类号:

TL816+.2

金成赫, 韦应靖, 王勇, 黄亚雯, 冯梅, 张庆利. 烟羽辐射模拟装置的研制及测试[J]. 辐射防护, 2014, 34(4): 234-239.

Jin Chenghe, Wei Yingjing, Wang Yong, Huang Yawen, Feng Mei, Zhang Qingli. Development and Test of a Radioactive Plume Simulator[J]. RADIATION PROTECTION, 2014, 34(4): 234-239.

参考文献

[1] Thompson IMG,Bøtter-Jensen L,Deme S,et al. (Luxembourg: Commission of the European Communities) Radiation Protection Report 106 Technical recommendations on measurements of external environmental gamma radiation doses[R]// A Report of EURADOS Working Group 12, Environmental Radiation Monitoring.1999.
[2] Bøtter-Jensen L. Testing of environmental radiation monitors using the risø low-level radiation measurement stations[J]. Radiation Protection Dosimetry,2000,92(1-3):109-114.
[3] Sa′ez-Vergara JC,Thompson IMG,Gurriara′n R,et al. The second eurados intercomparison of national network systems used to provide early warning of a nuclear accident[J]. Radiation Protection Dosimetry,2007, 123(2):190-208.
[4] 杨斌,我国环境γ辐射连续监测发展的回顾与展望[G]//首届全国核电站环境监测经验交流研讨会交流材料汇编. 2010:45-59.
[5] Moriuchi S,Miyanaga I. A spectrometric method for measurement of low-level gamma exposure dose[J]. Health Physics,1966,12:541-551.
[6] Moriuchi S. JAERI-M 7066 A dosimetric instrument based on the spectrum weighting function method for environmental radiation measurements[R]. 1977.
[7] 任晓娜,胡遵素. 用NaI(Tl)探测器测量γ辐射场剂量特性的加权积分法研究[J]. 辐射防护,2003,23(2):65-73.
[8] Jea-Shik Jun, Chul-Yong Yi, et al. Calculation of spectrum to dose conversion factors for a NaI (Tl) scintillation detector using the response matrix[J]. Journal of the Korean Physical Society,1995, 28(6):716-726.
[9] Chul-Yong Yi, Jea-Shik Jun et al. Calculation of spectrum to dose conversion factors for an HPGe spectrometer[J]. Journal of the Korean Physical Society,1983, 30(2):186-193.
[10] Yi CY, Jun JS, Chai HS, et al. Measurment of ambient dose equivalent suing a NaI(Tl) scintillation detector[J]. Radiation Protection Dosimetry,1997,74(4):273-278.
[11] ICRU. ICRU Report 57 Conversion coefficients for use in radiological protection against external radiation[M]. Oxford University Press,1998.