Assessment of current radiation doses to the population of Brodokalmak-village due to contamination of the Techa river

The assessment of the current and future radiation doses to the population, living in the contaminated zone on the Techa river, is carried out by example of the Brodokalmak settlement, located 110 km from the place of the radioactive wasters dumping. The foodstuffs consumption by the inhabitants of various age, established through direct questioning, the data on the radionuclides content in various water sources and main foodstuffs, as well as the results of the radionuclides dosimetry and their concentration in the soil-plant cover of the foodplain areas were accounted for in the assessment. Thus, the total dose included the external γ-irradiation and irradiation on the account of the radionuclides ingress into the body. The estimates were made by two scenarios of the population irradiation, involving strict observance of restrictions on the use of the Techa river and its foodplain (1) and absence of restrictions (2) as well as accounting for the real situation, when the inhabitants violate sometimes the prohibition on the use of the river and its banks. The estimates showed, that the doses by the first scenario proved to be lower as compared to the maximum permissible effective annual dose and by the second scenario - sufficiently higher. The real situation shows, that the dose for the majority of the settlement inhabitants is formed by the forst scenario