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- Title
Dynamics and Current State of the Radioecological Situation on the Territory of the Chernobyl Radioactive Trace in Bryansk Oblast.
- Authors
Buryakova, A. A.; Pavlova, N. N.; Kryshev, I. I.; Katkova, M. N.
- Abstract
The current radioecological situation of the territory in Bryansk oblast that was polluted as a result of the Chernobyl accident is analyzed based on calculating the radiation dose rate for reference organisms of the terrestrial biota. The initial data for the assessment were observation data (May–December in 1986–2020) on the density of soil contamination in the areas of Bryansk oblast located within different zones of radioactive contamination. Elk (Alces alces), the bank vole (Myodes glareolus), Scots pine (Pinus sylvestris), and the earthworm (Lumbricus terrestris) were selected as reference organisms of the terrestrial biota. The total radiation dose rate for the biota objects was determined in accordance with the recommendations of the International Commission on Radiological Protection (ICRP) and Roshydromet R 52.18.820–2015. 137Cs was considered as the main dose-forming radionuclide. The contribution of 90Sr to the radiation dose rate was insignificant (0.1–4.9%). Analysis of the radiation safety of biota objects consisted in checking the condition that the integral indicator of soil pollution (IISP) in the areas of Bryansk oblast did not exceed the environmentally safe level. According to the current monitoring data on the state of the territory of the Chernobyl radioactive trace, the IISP is significantly lower than the environmentally safe level for all areas of this region except for the exclusion zones. The maximum radiation doses were recorded for elk living in the vicinity of the village of Zaborye, Krasnogorsk raion, in 2020. According to a conservative estimate, a high dose load on biota exceeding the safe radiation level (SRL) for elk and the bank vole was observed in 1986 in Novozybkovsk raion. The dose rate for vertebrate animals in the contaminated areas of the region is one order of magnitude lower than the safe radiation level. In the future, it is recommended to continue radioecological studies of the territories and monitoring of the radiation situation in the most polluted areas of Bryansk oblast. It is also necessary to organize a radioecological reserve in the exclusion zones to carry out regular observations and improve the system of radiation protection of the environment.
- Subjects
CHORNOBYL (Ukraine); MOOSE; ENVIRONMENTAL protection; RADIOACTIVE contamination; SOIL pollution; RADIATION protection; EARTHWORMS
- Publication
Biology Bulletin, 2021, Vol 48, Issue 12, p2141
- ISSN
1062-3590
- Publication type
Article
- DOI
10.1134/S1062359021120037