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Natural radioactivity of materials used in industry and construction in Serbia
Four different kinds of materials (feldspar, gypsum, clay and kaolin) commonly used in building construction and industry in Serbia were analyzed for their natural radioactivity, using gamma spectrometry. The radium equivalent activity, [image omitted], the absorbed dose rate, [image omitted], the annual effective dose, [image omitted], and the external hazard index, [image omitted], were evaluated to assess the radiation hazard for people living in dwellings made of the materials studied. The radium equivalent activities calculated in all samples are lower than the maximum admissible value 370 Bq kg-1 set in the UNSCEAR report.[1] The absorbed dose rate in air was found to vary from 0.02 to 0.19 μGy h-1. Considering the fact that the average gamma dose rate indoors in Europe is 0.07 μGy h-1[2], gamma dose rate calculated for feldspar, clay and kaolin samples exceed this limit. The obtained results for annual effective dose exceed limits of 0.41 mSv[1] for feldspar, clay and kaolin samples. If the [image omitted] exceeds unity, we might conclude that the potential external dose(s) to exposed individual(s) will exceed the acceptable level, and some action may be required. The obtained values of [image omitted] are lower than unity for all investigated samples. All samples were measured immediately after preparation, except 10 samples of feldspar, because a comparative analysis were made between 215 samples which were measured immediately after preparation and 10 samples which were measured after radioactive equilibrium was reached in order to detect differences in the obtained concentrations.
Natural radioactivity of materials used in industry and construction in Serbia
Four different kinds of materials (feldspar, gypsum, clay and kaolin) commonly used in building construction and industry in Serbia were analyzed for their natural radioactivity, using gamma spectrometry. The radium equivalent activity, [image omitted], the absorbed dose rate, [image omitted], the annual effective dose, [image omitted], and the external hazard index, [image omitted], were evaluated to assess the radiation hazard for people living in dwellings made of the materials studied. The radium equivalent activities calculated in all samples are lower than the maximum admissible value 370 Bq kg-1 set in the UNSCEAR report.[1] The absorbed dose rate in air was found to vary from 0.02 to 0.19 μGy h-1. Considering the fact that the average gamma dose rate indoors in Europe is 0.07 μGy h-1[2], gamma dose rate calculated for feldspar, clay and kaolin samples exceed this limit. The obtained results for annual effective dose exceed limits of 0.41 mSv[1] for feldspar, clay and kaolin samples. If the [image omitted] exceeds unity, we might conclude that the potential external dose(s) to exposed individual(s) will exceed the acceptable level, and some action may be required. The obtained values of [image omitted] are lower than unity for all investigated samples. All samples were measured immediately after preparation, except 10 samples of feldspar, because a comparative analysis were made between 215 samples which were measured immediately after preparation and 10 samples which were measured after radioactive equilibrium was reached in order to detect differences in the obtained concentrations.
Natural radioactivity of materials used in industry and construction in Serbia
Todorovic, Dragana J. (author) / Jankovic, Marija M. (author)
Journal of Environmental Science and Health, Part A ; 46 ; 1147-1153
2011-08-01
7 pages
Article (Journal)
Electronic Resource
English
Natural radioactivity of materials used in industry and construction in Serbia
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