Research on the conversion coefficient for measuring radon concentration in water based on bubbling method
Research on the conversion coefficient for measuring radon concentration in water based on bubbling method
复制标题
基于鼓泡法测量水中氡浓度换算系数的研究
DOI：
10.1016/j.radmeas.2022.106808
复制
发表时间：
2022
影响因子：
2
通讯作者：
Yanliang Tan
中科院分区：
文献类型：
--
作者：
Tao Hu;Zhongkai Fan;Fen Lin;Yixiang Mo;Ruomei Xie;Shuaibin Liu;Shuai Yuan;Luwei Wang;Hongzhi Yuan;Yanliang Tan
杜里奇公司提供RAD7和H2O附件，用于基于鼓泡法测量水中的氡浓度。有两种类型的小样品瓶：40毫升和250毫升。该公司还提供了一个容量为2500毫升的大瓶子来测量水中的氡浓度。对于40毫升和250毫升样品瓶，换算系数分别为25和4。水附件的小干燥管只有30克干燥剂，长时间测量不便，需要频繁更换。此外，2500毫升的大干燥管样品瓶需要更长的响应时间。本文利用长寿命的大型干燥管测量水中的氡浓度。通常情况下，响应时间和灵敏度取决于样品瓶的体积和气路，因此获得不同条件下的换算系数以满足不同的测量要求是很重要的。提出了一种描述气路中氡浓度的新模型，以求取任意体积的样品瓶和干燥管的换算系数。通过选择合适的鼓泡时间和测量时间，该模型可以用来获得水中的氡浓度。·提出了一种描述空气回路中氡浓度的新模型。·可获得任何体积的测量装置的换算系数。·使用寿命长的大干燥管来测量水中的氡。·选择合适的鼓泡时间和测量时间，可以得到水中氡的含量。
Durridge Company offers RAD7 and H 2 O accessory to measure the radon concentration in water based on bubbling method. There are two types of small sample bottles: 40 mL and 250 mL. The company also provided a big bottle with the volume of 2500 mL to measure the radon concentration in water. For the 40 mL and 250 mL sample bottles, the conversion coefficients are 25 and 4, respectively. The small drying tube of water accessory contains only 30 g desiccant, which makes it inconvenient to measure for a long time and needs to be replaced frequently. Besides, the 2500 mL sample bottle with big drying tube needs longer response time. In this paper, a big drying tube with long lifetime is utilized to measure the radon concentration in water. Generally, the response time and the sensitivity depend on the volume of the sample bottles and the gas circuit, so it is important to obtain the conversion coefficients under different conditions to meet different measurement demands. A novel model is proposed for describing the radon concentration in the gas circuit to obtain the conversion coefficients for any volume of sample bottle and drying tube. By choosing the appropriate time of bubbling and measuring, this model can be utilized to obtain the radon concentration in water. • A novel model for describing the radon concentration in the air circuit is proposed. • The conversion coefficients in any volume of the measuring devices can be obtained. • A big drying tube with long lifetime is used to measure the radon-in-water. • Selecting suitable bubbling and measuring time, the radon-in-water can be obtained.