Section

Geoecology

Title

THE AFTEREFFECT OF AN UNDERGROUND NUCLEAR EXPLOSION ON THE CONTENT OF NATURAL AND ANTHROPOGENIC RADIO-NUCLIDES IN THE SOUTH OF THE TYUMEN REGION

Сontributors

L. N. Skipin, Head of the Department, This email address is being protected from spambots. You need JavaScript enabled to view it.;

V.Z. Burlaenko, postgraduate student, This email address is being protected from spambots. You need JavaScript enabled to view it.; Е. V. Zakharova, Associate Professor, This email address is being protected from spambots. You need JavaScript enabled to view it.. Tyumen industrial University (Tyumen)

Abstract

The article presents the results the comprehensive eco- logical and radiological studies of the soils at the site of an underground nuclear explosion, code-named “Tavda” in the lower Tavdinsky District in the south of the Tyumen Region. Within the framework of the research, the concentration of natural radio-nuclides in the profile of grey forest soil is identified, the specific effective activity of natural radio-nuclides is calculated. The data analysis showed that the studied area is characterized by a favourable natural geochemical background, in spite of the increased contents of natural radio-nuclides as compared to the background values. The content of radio-nuclides of cesium-137 and strontium-90 is determined directly at the epicenter and adjacent territory to the site of the explosion. The analysis of the layer-by- layer distribution of radioactive decay products showed that the concentration of strontium-90 is much  higher than the content of cesium-137, at some sampling points it is 1.5—2 times higher, these elements still have high residu- al values in the deeper layers of the soil profile and need constant periodic monitoring.

Keywords

underground nuclear explosion, pollution, strontium-90, cesium-137, soil, natural radionuclides, an thropogenic radionuclides.

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