Abstract
Our investigations with passive track etch dosemeters, involving 50 pairs of adjacent buildings, indicate that radon concentrations in the cellar, on the ground floor and the first floor are increased by 1146 (±423), 176 (±58) and 113 (±39) Bqm∼, respectively. These tests were carried out in single-family homes with a basement in direct contact with the subsoil compared to the levels obtained in houses sealed against the soil with a concrete slab. The extent to which radon concentrations in the cellar account for the radon levels in the living quarters, depends on specific structural characteristics of the building. Barriers between cellar and ground floor clearly decrease the amount of radon entering the living areas.
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