Radionuclides of Building Materials and Radon Concentrations in Belgrade Dwellings
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The results of determination of natural radionuclides (226Ra, 232Th, 40K) in raw building materials and final products are presented. Activity of the radionuclides was determined on an HPGe detector by standard gamma spectrometry. Mean activities of natural radionuclides were in the range of 2.0-560 Bq/kg depending on the radionuclide and the type of the material. Equivalent indices and OECD index for natural radionuclides were calculated, indicating lower content of natural radionuclides compared with data from other European countries. Indoor radon concentrations were measured in Belgrade dwellings by alpha scintillation counting technique. The concentrations were under 200 Bq/m3, depending on geochemical characteristics of the soil, building materials, construction of the building, storey number, dwelling conditions, as well as on the season. The measurements were performed as a part of the Quality Control Program for the Assessment by a National Laboratory for Radioactivity Control... of Building Materials.