SCIENTIFIC AND INFORMATION-ANALYTICAL MAGAZINE

ISSN 1024-6177 (Print), ISSN 2618-9615 (Online)

Medical Radiology and Radiation Safety. 2016. Vol. 61. No. 4. P. 5-18

RADIATION SAFETY

S.V. Panchenko, A.A. Arakelyan, E.A. Gavrilina, A.M. Shvedov

Dynamic of Radiological Situation in the Rural Settlements Contaminated by Cesium-137 caused by the Chernobyl Accident in April 1986

Nuclear Safety Institute of RAS, Moscow, Russia, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

ABSTRACT

Purpose: The study of the long-term migration of 137Cs in the soil of rural settlement to improve prediction of radiation exposure to the population caused by the Chernobyl accident and contamination of the territory.

Material and methods: The main experimental techniques are homestead measuring of gamma radiation dose rate in the settlement (6473 measurements) performed during 4 expeditions and covering a period of 24 years. In addition, the data on surface ground contamination of the territory was analyzed; the results of studies on migration of cesium deep into soil are given. Reconstruction of radiation exposure was conducted in accordance with national and international recommendations.

Results: A normalized estimation of the average external dose due to 137Cs for population residing permanently in the rural settlement located in the south-western district of the Bryansk Region was found out. It is in 50 mSv over 70 years at 1 MBq/m2 of the fallout of this nuclide.

Conclusion: The migration factor of radioactive cesium precipitated after the accident affected the formation of radiation exposure during the first 10-15 years. In subsequent years the radioactive decay of the isotope became a more significant factor.

Key words: radiological situation, Chernobyl accident, external doses, migration, soil, cesium-137

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For citation: Panchenko SV, Arakelyan AA, Gavrilina EA, Shvedov AM. Dynamic of Radiological Situation in the Rural Settlements Contaminated by Cesium-137 caused by the Chernobyl Accident in April 1986. Medical Radiology and Radiation Safety. 2016;61(4):5-18. Russian.

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