Development of an irradiation device for on-site calibration of environmental gamma radiation dose rate meter

Chao ZHAO; Zhen YANG; Fangdong TANG; Linfeng HE; Yihe XU; Xiaojun LU

doi:10.11889/j.0253-3219.2016.hjs.39.090201

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Development of an irradiation device for on-site calibration of environmental gamma radiation dose rate meter

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- Development of an irradiation device for on-site calibration of environmental gamma radiation dose rate meter
  封面论文
- NUCLEAR TECHNIQUES Vol. 39, Issue 9, Article number: 090201(2016)
- 作者机构：
  
  1.上海市计量测试技术研究院上海 201203
  2.复旦大学公共卫生学院上海 200032
  3.复旦大学放射医学研究所上海 200032
- 作者简介：
- 基金信息：
  
  Supported by AQSIQ Science and Technology Planning Project;Shanghai Municipal Quality Supervision Bureau Research Project
- DOI：10.11889/j.0253-3219.2016.hjs.39.090201
  CLC： TL84
- Received：06 June 2016，
  
  Revised：14 July 2016，
  
  Published：2016-09
- 稿件说明：
移动端阅览
Chao ZHAO, Zhen YANG, Fangdong TANG, et al. Development of an irradiation device for on-site calibration of environmental gamma radiation dose rate meter[J]. Nuclear techniques, 2016, 39(9): 090201
DOI：

Chao ZHAO, Zhen YANG, Fangdong TANG, et al. Development of an irradiation device for on-site calibration of environmental gamma radiation dose rate meter[J]. Nuclear techniques, 2016, 39(9): 090201 DOI： 10.11889/j.0253-3219.2016.hjs.39.090201.

摘要

为开展环境γ辐射剂量仪的现场校准，研制了一套辐照装置，其辐射场空气比释动能率可在0.27-34.86μGy·h

-1

范围内通过距离与减弱器来调节。基于大量Geant4蒙特卡罗模拟设计了一种轻便型辐射准直器，在保证辐射场品质的前提下，大大降低了准直器重量，更适用于现场校准。此外，还研制了一套自动化支撑平台与三片曲面辐射减弱器，可远程实现辐射装置空间定位以及辐射场强度和空间的调节，曲面辐射减弱器有利于保证辐射场均匀性。测试实验及蒙特卡罗模拟结果显示，该辐射装置辐射场再现性、自散射、均匀性等性能良好，通过系统地计算地面散射对辐射场的影响，可为现场校准提供指导。

Abstract

Background:

With the development of the nuclear safety technology in China

more and more environmental gamma radiation dose rate meters were fixed in the field to monitor the environmental radiation in real time.Calibration of these meters is inconvenient to do on-site.

Purpose:

This study aims to design and implement a portable irradiation device for on-site calibration of these dose rate meters.

Methods:

An irradiation collimator was designed through Monte Carlo simulation as the kernel component of the irradiation device

and an automated supporting platform with functionalities of ranging

shifting

switching attenuation plates and remote control of intensity and position was developed as the additional component.Experiments and Monte Carlo simulations were conducted to test the performance of the irradiation device and calibrate the air kerma rate in the radiation filed of it.Field-testing was also performed to check the practicability of this irradiation device on condition of on-site calibration.

Results:

The adjustable range of the air kerma rate in the reference radiation filed was 0.27-34.86μGy·h

-1

.The self-developed irradiation device had good performance on reproducibility

self-scattering

homogeneity and practicability in field application.

Conclusions:

A portable irradiation device was designed and developed through Monte Carlo simulation for the calibration of on-site dose rate meter

it can be used to achieve the traceability of the fixed environmental gamma radiation dose rate meter.

关键词

Keywords

references

刘华 , 赵顺平 , 梁梅燕 , . 我国辐射环境监测的回顾与展望 . 辐射防护 , 2008 . 28 ( 6 ): 362 - 376 . http://www.cnki.com.cn/Article/CJFDTOTAL-FSFH200806004.htm .

Hua LIU , Shunping ZHAO , Meiyan LIANG , . Review and prospect of environmental radiation monitoring in China . Radiation Protection , 2008 . 28 ( 6 ): 362 - 376 . http://www.cnki.com.cn/Article/CJFDTOTAL-FSFH200806004.htm .

高飞 , 肖雪夫 , 倪宁 . 固定式环境γ辐射剂量率仪现场校准技术 . 原子能科学技术 , 2015 . 49 ( 2 ): 212 - 217 . http://www.cnki.com.cn/Article/CJFDTOTAL-YZJS201502004.htm .

Fei GAO , Xuefu XIAO , Ning NI . On-site calibration technology for fixed environmental gamma radiation ratemeter . Atomic Energy Science and Technology , 2015 . 49 ( 2 ): 212 - 217 . http://www.cnki.com.cn/Article/CJFDTOTAL-YZJS201502004.htm .

国家质量技术监督总局.GB/T 12162.1-2000:用于校准剂量仪和剂量率仪及确定其能量响应的X和γ参考辐射（第一部分:辐射特性及产生方法）[S].北京:中国标准出版社, 2001

The State Administration of Quality and Technical Supervision.GB/T 12162.1-2000:X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy Part 1:radiation characteristics and production methods[S].Beijing:Standard Press of China, 2001

Collaboration Geant4 . Geant4 user's guide for application developers , CERN , 2015 . 1 .

Collaboration Geant4 . Physics reference manual , CERN , 2015 . 182 .

National Institute of Standards and Technology.XCOM program[CP/OL].2016-5-18. http://physics.nist.gov/PhysRefData/Xcom/Text/chap4.html http://physics.nist.gov/PhysRefData/Xcom/Text/chap4.html

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