溢流式驻极体水氡浓度测量方法与装置

The Approach and Device for Water Radon Measurement with Overflowing Electret

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4L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4L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-H20套件对水中浓度对比测量. 结果显示,水氡浓度 4-97Bq/L范围内三种方法 -致性良好.

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 ioniza-tion chamber, water radon was released with the nitrogen aerating disturbance. The average radon concentration was detected by the E-perm electret. Furthermore, RAD7- H20 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.