Radioactive contamination of aquatic ecosystems in the areas of nuclear power plants and other nuclear facilities in Russia

A comparative analysis of the radioactive contamination of aquatic ecosystems in the territory of Russia has been performed. The estimated contents of Sr-90 and Cs-137 in water, bottom sediments and fish are presented for cooling ponds of nuclear power plants (NPPs), aquifers of the Urals and of Chernobyl, and for the Yenisei River. The most highly contaminated water bodies in Russia are the Techa River and several lakes in the Chelyabinsk and Bryansk Regions. The analysis of doses due to the radioactive contamination of aquatic ecosystems is given.