[The reconstruction of radiation dose and risk assessment for population living near the Enisei River from the long-term period of exploitation of the Krasnoyarsk mining and chemical enterprise (1975-2000)].

ABSTRACT

Radiation doses and risks for population living near the Yenisei River have been reconstructed for the long-term period of radioactive discharges from Krasnoyarsk NCC to the river (1975-2000). The analysis of multiple pathways show that the consumption of local fish was the major contributor to the radiation dose to population living near the Yenisei River (more than 90%). 32P was the most important contributor among the discharged radionuclides at the distances 0-100 km downstream the Krasnoyarsk NCC. The maximum annual dose to critical group of population at the nearest area of the Krasnoyarsk NCC was estimated to be 0.95 mSv/year (in 1977), at the same time in settlement located 800 km downstream the discharge source it was 0.2 mSv/year. Since 1993, the doses to population do not exceed 0.02 mSv/year even for nearest area the Krasnoyarsk NCC (0-100 km downstream the discharge source).