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Assessment of radioactivity of environmental components in the Kostomuksha state Nature Reserve. P. 3–13

Версия для печати

Section: Geosciences

UDC

504.064

Authors

GP Kiselev1,†, EYu Yakovlev1, SV Druzhinin1, IM Kiseleva1, AV Bazhenov1, VM Bykov2
1 Federal Centre for Integrated Arctic Research named after N.P. Laverov, Russian Academy of Sciences (Arkhangelsk, Russian Federation)
2 Northern (Arctic) Federal University named after M.V. Lomonosov (Arkhangelsk, Russian Federation)
† Deceased

Abstract

The radiological state of the land and water areas constantly attracts public interest. Specially protected natural reservations deserve special attention when it comes to studying radiological conditions. This study presents findings of radioecological investigations conducted in the Kostomuksha State Nature Reserve in 2012 – 2015. The Kostomuksha Mining Company, which is developing the Kostomuksha iron ore deposit was identified as a potentially hazardous facility that might affect the radioecological situation in the naturel reserve, since production of iron ores at the deposit involves extraction to the ground surface of acid rocks characterised by a naturally high content of radioactive elements (granitic gneiss). Furthermore, several sources of radioactive radon gas have been identified within the reserve boundaries. The study included investigation of natural and anthropogenic radioactivity in the environmental components of the nature reserve and adjacent territories, including soil, plants, bottom sediments, ambient air and natural waters. It was found that development of the Kostomuksha iron ore deposit and operations of the mining and processing plant do not exert any considerable impact on the radiological situation in the nature reserve. Data obtained during the study indicate that the overall radiological situation in the reserve is acceptable and meets the relevant radiation safety standards. High levels of radiocesium were found in the moss and bottom sediments of the nature reserve, which requires additional research to determine a wider pattern of distribution of anthropogenic radioactivity across the adjacent territories and to study the processes of buildup and migration of radionuclides in aquatic organisms of Kamennoye Lake.

Keywords

bottom sediments, radioactive elements, radiocesium, the Kostomuksha Nature Reserve
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