Abstract
The current radionuclide pollution of the marine environment (water and bottom sediments) in the coastal zone of the Kola Peninsula have been analyzed. The background pollution of the coast is formed by the Barents Sea water inflow, nuclear fleet infrastructure facilities, and radioactive waste management operations. The main factors determining radiation background and spatial dynamics of pollution in the largest bays and open coastal areas have been considered. As a result, it is stated that the main factor determining the radiation background of the open coastal zone is the transfer of 137Cs and 90Sr radioisotopes from the Norwegian Sea and the North Atlantic by the Murmansk nearshore current. The emission of radionuclides from nuclear infrastructure facilities in the Andreev, Zapadnaya Litsa, and Kola bays is insignificant and has a local nature in terms of the scale of impact.
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