Annual effective dose and concentration levels of gross α and β in various waters from Samsun, Turkey Original Research Article

Samsun city which is between the deltas where Yeşilırmak and Kızılırmak rivers run out, exists in the middle part of Black Seaʹs costal way. It is the biggest city of the Black Sea Region in terms of population, industry, trade, natural and cultural wealth. There is no information about radioactivity measurement reported in water samples in the Samsun province so far. For this reason, gross α and gross β activities of 19 different water samples collected from spring, river and tap waters in Samsun were determined. The instrumentation used to count the gross α and gross β activities was an α/β counter of the low background multiple detector type with 10 sample detectors (Berthold LB770). The average activity concentrations were 51.9 mBq/l, 77.8 mBq/l for gross α and gross β in tap water. The obtained results showed that, natural activity concentrations of α and β emitting radionuclides in drinking, spring and river water samples did not exceed WHO recommendations. For all samples the gross β activity is always higher than the gross α activity. The results obtained in this study indicate that the annual effective doses are below the WHO recommended reference level of 0.1 mSv/y for all water samples.