Gadd M S, Borak T B
Department of Radiological Health Sciences, Colorado State University, Ft. Collins 80523.
Health Phys. 1994 Jul;67(1):53-9. doi: 10.1097/00004032-199407000-00007.
This paper describes the entry rate of 222Rn into a basement structure surrounded by a sandy clay loam soil. The highest indoor radon concentrations occurred when the rate of entry was lowest. Data from in-situ measurements were used to identify the entry pathways and also the origins of the radon during periods when the entry rate was low. Results indicated that 25% of the radon entered through the floor-wall joint and 75% through the floor and walls. About 30% of the radon originated in the concrete. Diffusion was the primary transport mechanism. However, radon entry through the floor-wall joint was a combination of diffusion and a convective flow between the subslab region and the interior of the structure.
本文描述了氡 - 222进入由砂质粘壤土包围的地下室结构的进入速率。当进入速率最低时，室内氡浓度最高。利用现场测量数据确定了进入途径以及进入速率较低时期氡的来源。结果表明，25%的氡通过地板与墙壁的接缝进入，75%通过地板和墙壁进入。约30%的氡源自混凝土。扩散是主要的传输机制。然而，氡通过地板与墙壁的接缝进入是扩散与楼板下区域和结构内部之间对流的组合。
