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MAYAK PA plant (Southern Urals, Russia) is an enterprise for production and reprocessing of weapon’s grade plutonium. Between 1949 and 1951 about 100 PBq of intermediate and low level liquid radioactive wastes were released into the Techa River. To estimate the radiation exposure of Techa River residents taken place in the past the EPR measurements of teeth enamel were performed. The cumulative dose...