title: Partitioning of 222Rn entry into a structure surrounded by soil.
abstract: 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.
authors.affiliation: Department of Radiological Health Sciences, Colorado State University, Ft. Collins 80523.
authors.forename: M S
authors.initials: MS
authors.lastname: Gadd
authors.forename: T B
authors.initials: TB
authors.lastname: Borak
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis*; D016902:Air Pollution, Indoor / Q000032:analysis*; D003252:Construction Materials; D005430:Floors and Floorcoverings; D006798:Housing; D006801:Humans; D011886:Radon / Q000032:analysis*; D012987:Soil
chemical_list: D000396:Air Pollutants, Radioactive; D012987:Soil; D011886:Radon