大亚湾地下实验室氡浓度测量与评估

Measurement and Evaluation of Radon Concentration in Daya Bay Underground Laboratory

采用多种测氡方法对大亚湾反应堆中微子地下实验室空气及水中氡浓度,大厅墙壁及水池壁氡析出率进行了评估。测量数据显示:大亚湾地下实验室大厅墙壁不同地点的氡析出率值大小相差较大,但水池中的水氡浓度依然呈现出靠近水池壁处更高的现象。氮封及膜覆盖对地下实验厅及水池中氡浓度的降低有作用。

In this paper,a variety of methods for measuring radon were used to evaluate the radon concentration in the air and water radon in the underground neutron laboratory of the Daya Bay reactor,as well as the wall of the hall,and the rate of precipitation of the pool wall.The measurement data show that the values of the radon outflow rate at different locations on the walls of the underground lab hall in Daya Bay are quite different,but the radon concentration in the pool still shows a higher phenomenon near the wall of the pool.Nitrogen seals and membrane coverage have an effect on the reduction of radon concentrations in underground laboratory halls and pools.