The systemic radiation monitoring of the environment in the vicinity of the Kozloduy NPP is exceptionally significant part of the radiation protection. For monitoring purposes and in accordance with the control program annually samples are being analyzed to determine the content of anthropogenic long-lived radionuclides of a biological significance such as 90Sr and 137Cs. The goal of performing radio-ecological studies is to assess the impact of gaseous and liquid effluents during the normal operation of the nuclear power plant and to determine the potential radiological risk to the population in this region and to the population as a whole.
In this paper are presented the results from the analyses of the content of 90Sr and 137Cs in soils and bottom sediments at 17 sampling sites, located from 6 to 90 km around the Kozloduy NPP in four Bulgarian districts. The obtained results of the investigation and analyses for the period 2008-2010 are shown in tables and figures. Annual results are compared with those
from previous years, as well as with data from the pre-operational period of the Kozloduy NPP.
Keywords: NPP Kozloduy, soils, bottom sediments, 90Sr, 137Cs.