EVOLUTION OF THE 137Cs CONCENTRATION FIELD IN THE BLACK SEA AFTER THE PASSAGE OF THE CHERNOBYL CLOUD

S. G. Demyshev, A. S. Zapevalov, A. I. Kubryakov, and T. V. Chudinovskikh

The transport of 137Cs got to the Black Sea from the Chernobyl nuclear cloud is analyzed. A model is constructed which describes the evolution and transport of a long-lived radionuclide spot formed by the intensive local short-term atmo¬spheric fallout. It is demonstrated that radioactive products mostly deposited over the northeastern Black Sea. It was established that the increased content of radionuclides in the western sea in the fall of 1986 was attributed to the more contaminated waters transported from the northeastern sea. The maximum level of contamination of the Black Sea surface water due to the Chernobyl accident were estimated from the calculation results.

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