Design of dual channel artificial radioactive aerosol monitoring system

Guoqiang ZENG; Maolin LAI; Min GU; Song QING; Kun YANG; Yi GU; Yuan XIA; Liangquan GE; Ming XIAO

doi:10.11889/j.0253-3219.2017.hjs.40.050402

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Design of dual channel artificial radioactive aerosol monitoring system

NUCLEAR ELECTRONICS AND INSTRUMENTATION | 更新时间：2021-05-19

- Design of dual channel artificial radioactive aerosol monitoring system
- NUCLEAR TECHNIQUES Vol. 40, Issue 5, Article number: 050402(2017)
- 作者机构：
  
  1.成都理工大学四川省地学核技术重点实验室成都 610059
  2.中广核久源成都科技有限公司成都 610200
- 作者简介：
- 基金信息：
  
  by National Natural Science Foundation of China;"863" Program;Youth Foundation of Science Technology Department of Sichuan Province
- DOI：10.11889/j.0253-3219.2017.hjs.40.050402
  CLC： TL84
- Received：22 November 2016，
  
  Revised：01 March 2017，
  
  Published：10 May 2017
- 稿件说明：
移动端阅览
Guoqiang ZENG, Maolin LAI, Min GU, et al. Design of dual channel artificial radioactive aerosol monitoring system[J]. Nuclear techniques, 2017, 40(5): 050402
DOI：

Guoqiang ZENG, Maolin LAI, Min GU, et al. Design of dual channel artificial radioactive aerosol monitoring system[J]. Nuclear techniques, 2017, 40(5): 050402 DOI： 10.11889/j.0253-3219.2017.hjs.40.050402.

摘要

人工放射性气溶胶的监测环境较为复杂，有时甚至要在地下洞库、坑道或地下核设施测量，其环境中氡及其子体产物的浓度高达10

-10

Bq·m

-3

。在高氡钍环境下，氡钍能峰拖尾导致其放射性计数影响了人工气溶胶道址计数，进而影响人工放射性气溶胶的探测下限。本文研制了一种适合在高氡环境下工作的常压、真空双通道人工气溶胶监测仪。虽然常压测量通道测量准确度较差，但响应速度快，可以弥补真空测量通道测量准确但响应速度慢的缺点。本仪器对大气环境中钚、铀气溶胶检测的响应时间快，在有人工核素泄露的情况下最快30 min内可以得到测量结果，理论探测下限可达到10

-4

-10

-3

Bq·m

-3

，可验证探测下限为铀0.1 Bq·m

-3

、钚0.02 Bq·m

-3

，适用于各类需要对人工核素进行无人监测的高氡环境场所。

Abstract

Background

The environments for monitoring artificial radioactive aerosol are often complex

as sometimes it could even be in underground caverns

tunnels or underground nuclear facilities

of which the concentration of both radon and its radioactive products would be up to 10

-10

Bq·m

-3

. However

under high radon condition

the tailing phenomenon of radon and thorium peaks could interfere with radioactive counts and the artificial aerosol counts

thus affecting the detection limit of radioactive aerosol.

Purpose

This study aims to design a special normal-pressured artificial aerosol monitoring equipment

which can operate well under the high radon environment.

Methods

Dual-channel synchro measurement was employed to combine high accuracy of the vacuum channel and the fast response of the normal pressure channel.

Results

Implemented aerosol monitoring system can respond rapidly to plutonium and uranium aerosol in atmospheric environment

and in the case of artificial radionuclide leakage

the fastest measurement results can be obtained in 30 min. In general

the theoretical detection limit can reach 10

-4

-10

-3

Bq·m

-3

and the verifiable detection limit of uranium and plutonium are 0.1 Bq·m

-3

and 0.02 Bq·m

-3

respectively.

Conclusion

This design can be applied to a variety of high radon environments which require unmanned monitoring for artificial nuclear.

关键词

Keywords

references

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