Analysis of the effectiveness of measures on reduction population radiation doses due to technogenic and natural sources on the example of Muslyumovo village, the river Techa
The aim of the study was to analyze the effectiveness of measures on reduction of population radiation exposure at the radioactively contaminated territories by comparing radiation doses due to natural and technogenic sources. Materials and methods: the effective doses of radiation exposure due to the Techa River contamination in Muslyumovo were calculated using the data on radionuclide intakes and coefficients recommended by ICRP. Exposure to radon was estimated based on the results of radon surveys of Muslyumovo in 1992 and New Muslyumovo in 2015. Results: the total effective dose due to the Techa River contamination accumulated over the period 1950 - 2000 was 144 mSv. Annual effective doses due to radon in Muslyumovo and New Muslyumovo were 9,2 and 5,1 mSv respectively. The total effective dose received due to the natural and technogenic radiation was about 0,7 Sv (a contribution of radon is 77%). The total averted dose by the year 2015 due to resettlement in 2007 is 38 mSv. The dose reduction appeared mostly due to lower radon exposure. Conclusion: the maximum reduction of population exposure could be achieved by means of timely evacuation to uncontaminated territory together with the indoor radon prevention measures.