The natural and artificial radionuclides in drinking water samples and consequent population doses

Abstract

Concentration levels of Ra-226, Ra-228, K-40 and Cs-137 were determined in 52 drinking water samples collected from the different supplies in Samsun province to evaluate annual effective dose due to the ingestion of the drinking water samples. The activity concentrations of Ra-226, Ra-228 and K-40 natural radionuclides in the drinking water samples varied from <27 to 2431 mBq L-1, < 36 to 270 mBq L-1 and < 47 to 2880 mBq L-1 respectively. The activity concentrations of the artificial radionuclide 137Cs in the drinking water samples were lower than minimum detectable activity except in one drinking water sample (DW14) with an associated activity concentration of 2576 mBq L-1. Contributions of the consumed water samples to annual effective dose from Ra-226, Ra-228 and K-40 varied from 1.6 to 33.4 mu Sv y(-1) with a mean of 6.1 mu Sv y(-1), 2.2 to 46.8 mu Sv y(-1) with a mean of 8.6 mu Sv y(-1), 4.7 to 97.5 mu Sv y(-1) with a mean of 17.9 mu Sv y(-1) for infants, children and adults, respectively. The results showed that all values of the annual effective dose of ingestion of these water samples were below the individual dose criterion of 100 mu Sv y(-1) reported by World Health Organization (WHO). Copyright (C) 2015, The Egyptian Society of Radiation Sciences and Applications. Production and hosting by Elsevier B.V.