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ASSESSMENT OF THE CURRENT INTERNAL DOSE DUE TO 137Cs and 90Sr FOR PEOPLE LIVING WITHIN THE SEMIPALATINSK TEST SITE, KAZAKHSTAN

Abstract— The Semipalatinsk Test Site in Kazakhstan was one of the major sites used by the USSR for testing nuclear weapons for more than 40 y. Since the early 1990’s, responsibility for the site has passed to the Kazakh authorities. There has been a gradual re-establishment of agricultural use such as horse and sheep farming. Therefore, it has become important to evaluate the current and future risk to people living on and using the contaminated area. Internal dose assessment is one of the main components of the total dose when deriving risk factors for population living within the test site. Internal doses based on food monitoring and whole body measurements were calculated for adults and are in the range of 13–500 &mgr;Sv y−1 due to radiocesium and radiostrontium.