Radiation-hygienic monitoring and assessment of the doses of the public residing on the radioactively contaminated territories of the Tula region

A E Lomovtsev,T E Sheveleva,A I Volodicheva,A S Karpukhin

doi:10.21514/1998-426x-2019-12-2s-115-120

Abstract

Aim of the study: analysis of the results of the radiation-hygienic monitoring of the territories of the Tula region, contaminated due to the Chernobyl NPP accident; concentration of 137Cs and 90Sr in the locally produced food products and analysis of the annual effective dose of the public. Materials and methods: the study was performed in the Tula region in 1997-2018. It included the evaluation of the indicators of the radiation safety of more than 50 thousand samples of the main food products, sampled in the areas of the radioactive “Chernobyl” contamination of the region with the simultaneous measurement of the external gamma-radiation dose rate in the stationary control points. Additionally, it included the assessment of the dynamics of concentration of 137Cs and 90Sr in food products, maximal values of mean annual effective doses of the public and contribution of the collective dose from medical exposure into the structure of the annual collective dose of the public. Results: The study allowed estimating the concentration of 137Cs and 90Sr in the main local food products. Estimated values of gamma radiation dose rate were stable and laid in the range of normal variations specific to the middle latitudes of the European part of Russia. The values of maximal mean annual effective doses of the public indicate the stable radiation environment and do not exceed 1 mSv. It should be mentioned that the contribution of collective dose from medical exposure into the annual collective dose of the public as well as the values of mean individual effective doses from medical exposure are reducing with the increase in the number of X-ray examinations. Conclusions: The lack of exceedances of the permissible levels of 137Cs and 90Sr in the locally produced food products and the reduction of the mean annual effective dose of the public indicates the possibility of the transfer of the settlements affected by the Chernobyl NPP accident into the normal living conditions within the program of the transfer of the settlements from the “Chernobyl” zone.

Highlights

Последствием аварии на Чернобыльской АЭС для Тульской области явилось радиоактивное загрязнение почти 50% ее территории
В настоящее время продолжается работа по уточнению радиационной обстановки во всех радиоактивно загрязненных районах области и проводится мониторинг динамики показателей радиационной безопасности объектов среды обитания, который включает в себя лабораторные исследования продуктов питания, произведенных на данных территориях, а также оценку и анализ средних годовых эффективных доз облучения населения
The lack of exceedances of the permissible levels of 137Cs and 90Sr in the locally produced food products and the reduction of the mean annual effective dose of the public indicates the possibility of the transfer of the settlements affected by the Chernobyl NPP accident into the normal living conditions within the program of the transfer of the settlements from the “Chernobyl” zone

Summary

Introduction

Последствием аварии на Чернобыльской АЭС для Тульской области явилось радиоактивное загрязнение почти 50% ее территории. Карпухин Александр Сергеевич Управление Федеральной службы по надзору в сфере защиты прав потребителей и благополучия человека по Тульской области Адрес для переписки: 300045, Тула, ул. СГЭД90, мЗв/год / Аverage annual effective dose, mSv / year

Results

Conclusion