FROM ZONING RADIOACTIVE CONTAMINATED TERRITORIES TO CLASSIFICATION OF SETTLEMENTS AT AN AVERAGE ANNUAL EFFECTIVE DOSES IN REMOTE PERIOD AFTER THE ACCIDENT

Abstract

In a remote period after the Chernobyl accident, in an existing exposure situation there is a need of the transition from "zoning radioactive areas" to ensure the appropriate level of radiation and social protection of the residents of settlements located on radioactively contaminated territories to "the classification of settlements by average annual effective doses of critical group of people among the residents of the settlement". The analysis of the distributions of average annual effective external and internal doses, the average annual effective total dose of settlement residents referred to the corresponding zones on the last decision of the Council of Ministers, and on the proposed dose ranges confirmed this. In accordance with the principles of radiation protection, it seems reasonable to classify the settlements located on the radioactive contaminated territories at an average annual effective doses: <0,1 mSv/year (not required to carry out countermeasures in the agriculture); ≥0,1-1 mSv/year (periodic radiation monitoring should be carried out); ≥1 mSv/year (it is necessary to enter set of protective measures).