Archives → 2020 → V. 60. №3. → pp. 298–304
Article
Correlation of Volume Activity of Tritium in Melted Snow and Birch Sap in “Mayak” PA Affected Area in Spring 2016
V. V. Vostrotina, A. Y. Yanov, and L. V. Finashov
Southern Urals Biophysics Institute (SUBI), Ozyorsk, Russia
Abstract
Radioecological investigation of birch sap and melted snow in the affected area of the Federal State Enterprise «Mayak» Production Association ( «Mayak» PA) was performed in March 2016. Maximum volume activity (VA) of tritium in 19 samples of birch sap made 190 Bq/dm3, in the samples of melted snow – 110 Bq/dm3. Processing of the measured results showed a statistically significant grade correlation (p = 0.02) between VA of tritium in samples of melted snow and VA of tritium in samples of birch sap correspondingly pairwise to one geographical location; at that no statistically significant difference in pairwise sign test was observed between VA values. A simplified model of decrease of radionuclide VA in birch sap in relation to the distance from «Mayak» PA in the form of exponential function was developed. Parameters of normal (Gaussian) distribution with constant component of dependence of tritium VA in birch sap from geographic coordinates were obtained by means of processing the results of the measurements. The latter model was preferential regarding value of adjusted R2.
Keywords
tritium, environment, “Mayak” PA, volume activity, snow, birch sap
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