Influence of air pumping flow rate on the continuous measurement of open-loop radon exhalation rate

Chang LIU; Jian SHAN; Jiulin YUAN; Shili ZHONG; Detao XIAO; Xiaoxiang LIU; Yan LIU

doi:10.11889/j.0253-3219.2016.hjs.39.010401

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Influence of air pumping flow rate on the continuous measurement of open-loop radon exhalation rate

更新时间：2021-05-24

- Influence of air pumping flow rate on the continuous measurement of open-loop radon exhalation rate
- NUCLEAR TECHNIQUES Vol. 39, Issue 1, Article number: 010401(2016)
- 作者机构：
  
  1.南华大学核科学技术学院衡阳 421001;
  2.山东省核与辐射安全监测中心济南 250117
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2016.hjs.39.010401
  CLC： O571.3
- Received：18 September 2015，
  
  Accepted：2015-12-12，
  
  Published：25 January 2016
- 稿件说明：
移动端阅览
Chang LIU, Jian SHAN, Jiulin YUAN, et al. Influence of air pumping flow rate on the continuous measurement of open-loop radon exhalation rate[J]. Nuclear techniques, 2016, 39(1): 010401
DOI：

Chang LIU, Jian SHAN, Jiulin YUAN, et al. Influence of air pumping flow rate on the continuous measurement of open-loop radon exhalation rate[J]. Nuclear techniques, 2016, 39(1): 010401 DOI： 10.11889/j.0253-3219.2016.hjs.39.010401.

摘要

应用MATLAB对开环式氡析出率测量过程中不同抽气流率下集氡罩内氡浓度随时间的变化规律进行模拟计算

并用实验对计算结果进行了验证。结果表明

在氡析出率测量时保持集氡罩参数不变的情况下

随着抽气流率的增大

集氡罩内平衡氡浓度值减小

达到平衡氡浓度的时间也缩短。实验表明

集氡罩内的平衡氡浓度的减小可最大限度地减小泄露与反扩散的影响;抽气流率的变大使集氡罩内达到平衡氡浓度时间缩短以及集氡罩内的充气均匀性愈好。通过本次实验

获得的抽气流率为1.94-3.0 L·min

-1

集氡罩底面积为299cm

体积为1.79×10

-3

。

Abstract

Background:

The research on radon exhalation rate mainly focuses on the influence factors of radon exhalation rate on the media surface

while research is still lacking with respect to equilibrium radon concentrations in radon cover sets

gas flow rate and other factors affecting the measurement accuracy of radon exhalation rate.

Purpose:

This study aimed to explore the relationship of the open-loop air-bleed rate

equilibrium radon concentrations and radon exhalation rate through theoretical calculations and actual measurements.

Methods:

MATLAB was used to simulate the variations of radon concentrations with time at different air-bleed rates during the open-loop measurement of radon exhalation rate in radon cover sets. The results were further proven by experiments.

Results:

In the case of constant parameters in radon cover sets in the measurement of radon exhalation rate

the equilibrium concentrations of radon decreased with the increase of air-bleed rates

and the time to reach the equilibrium concentrations

was also shortened. The decrease of equilibrium concentrations of radon minimized the effect of the leakage and counter diffusion. The increase of air-bleed rates shortened the time for radon concentrations to reach equilibrium with better inlet gas uniformity in the radon cover sets.

Conclusion:

Reasonable parameters were obtained in this experiment with 1.94-3.0 L·min

-1

for air-bleed rates

299 cm

for basal area and 1.79×10

-3

for the volume of radon cover sets.

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Keywords

references

陈凌 , 谢建伦 , 黄隆 . 氡面析出率的测量及相关因素的考虑 . 辐射防护通讯 , 1998 . 18 ( 6 ): 28 - 36 .

CHEN Ling , XIE Jianlun , HUANG Long . Measurement of radon surface exhalation rate and consideration of correlation factor . Radiation Protection Bulletin , 1998 . 18 ( 6 ): 28 - 36 .

李韧杰 . 氡析出率的测定及其影响因素的探讨 . 铀矿冶 , 2000 . 19 ( 1 ): 56 - 61 .

LI Renjie . Measurement of radon exhalation rate and its discussion of influence factor . Uranium Mining and Metallurgy , 2000 . 19 ( 1 ): 56 - 61 .

曹众为 . 压力梯度和温度对多孔射气介质氡析出率影响的试验研究 . 衡阳: 南华大学 , 2013 .

CAO Zhongwei . Experimental study on influence of pressure gradient and temperature on radon exhalation from porous emanium medium . Hengyang: University of South China , 2013 .

苏日娜 . 大气压力变化对于土壤氡析出率的影响 . 北京: 中国地质大学 , 2008 .

SU Rina . Atmospheric pressure fluctuation effects on soil radon exhalation . Beijing: China University of Geosciences , 2008 .

Tan Y , Xiao D , Yuan H , . A method to simultaneously and continuously measure the 222 Rn and 220 Rn exhalation rates of soil in an open loop . Isotopes in Environmental and Health Studies , 2014 . 50 ( 4 ): 531 - 537 .

Tan Y L , Xiao D T , Yuan H Z , . Revision for measuring radon exhalation rate in open loop . Journal of Instrumentation , 2013 . 8 ( 2 ): 1 - 7 .

肖德涛 , 谭延亮 , 赵桂芝 , . 开环式测量氡析出率的方法研究 . 第三次全国天然辐射照射与控制研讨会论文汇编 , 2010 .

XIAO Detao , TAN Yanliang , ZHAO Guizhi , . Study on measurement method of radon exhalation rate in open loop . The 3 rd national seminar on natural radiation irradiation and control compilation of papers , 2010 .

李先杰 , 丘寿康 , 刘纯魁 . 氡析出率测量仪的检定装置 . 辐射防护 , 2008 . 28 ( 4 ): 197 - 201 .

LI Xianjie , QIU Shoukang , LIU Chunkui . A calibration facility for radon fluxmeter 置 . Radiation Protection , 2008 . 28 ( 4 ): 197 - 201 .

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