~(137)Cs AND ~(90)Sr IN BODIES OF SURFACE WATER IN BRYANSK OBLAST IN 1987-2002

摘要

The dynamics of the radioactive contamination with ~(137)Cs and ~(90)Sr of the Besed' and Iput' rivers in 1987-2004 and the nondraining Lake Svyatoe on the Besed' River and the slowly draining Lake Kozhanovskoe in 1992-2002 is prsented. Data on the contamination of the components and shorelines of reservoirs are presented. It is shown that the radioactive contamination of these rivers is decreasing; the present level of contamination is much lower than the intervention level. The radionuclide content in the nondraining and slowly draining lakes remains high. Specifically, the ~(137)Cs concentration in the waters of Lake Svyatoe on the Besed' River is at the intervention level, and the ~(137)Cs concentration in the fish in Lake Kozhanovskoe is ten times higher than the established norms.