同位素 ›› 2016, Vol. 29 ›› Issue (4): 241-247.DOI: 10.7538/tws.2016.29.04.0241

• 放射性同位素及放射源 • 上一篇    下一篇

溢流式驻极体水氡浓度测量方法与装置

张辉1;邓君2;徐乐昌1;李先杰1   

  1. 1.核工业北京化工冶金研究院 北京101149;2.中国疾病预防控制中心 辐射防护与核安全医学所 北京100088
  • 出版日期:2016-11-20 发布日期:2016-11-21

The Approach and Device for Water Radon Measurement with Overflowing Electret

ZHANG Hui1;DENG Jun2;XU Le-chang1;LI Xian-jie1   

  1. 1.Beijing Research Institute of Chemical Engineering and Metallurgy, Beijing 101149, China;2.National Institute for Radiological Protection, China CDC, Beijing 100088, China
  • Online:2016-11-20 Published:2016-11-21

摘要:

针对目前国内水氡浓度“原样”测量面临的困难,本研究提出一种溢流式驻极体水氡浓度测量方法与装置,采用E-perm驻极体与离子腔组合形成电离腔作为氡探测器,将稳定含氡水流以固定流量缓慢流经4 L扩散腔,底部采用固定流量氮气流强化曝气,水中氡在氮气扰动下进入缓冲罐混合,将驻极体悬挂于4 L玻璃罐中部,采用驻极体测量罐子中气体氡浓度方式测量连续水流平均氡浓度,同时采用了RAD7-H2O套件对水中浓度对比测量。结果显示,水氡浓度4~97 Bq/L范围内三种方法一致性良好。

关键词: 驻极体, 水氡, 辐射防护

Abstract:

To solve the difficulties in “original” radon concentration measuring, this paper proposed an overflow type electret radon concentration measurement method and device. A 4 L jar was applied as ionization chamber and E-perm electret was applied as radon detector. When the steady radon contaminated water flowed through the ionization chamber, water radon was released with the nitrogen aerating disturbance. The average radon concentration was detected by the E-perm electret. Furthermore, RAD7-H2O kit was used to measure the radon concentration for comparison. The results showed that different methods had well consistency with the water radon concentration in the range of 4 to 97 Bq/L.

Key words: electret, radon in water, radiation protection