Archives → 2022 → Vol. 62, № 3 → pp. 295–307
Article
Retrospective Assessment of Formation of Radiation Situation in Pine Plantations in First Year after Chernobyl Accident
Perevolotskaya T. V., Perevolotsky A. N., and Geras’kin S. А.
Russian Institute of Radiology and Agroecology, Obninsk, Russia
Abstract
The article presents results of retrospective assessment density of radionuclide deposition as result of Chernobyl accident for pine plantations growing on northern highway of Belarusian sector of the 30-kilometer zone around station. A decrease in total density of soil contamination and proportion of radionuclides of fuel component of emissions was found as it moved away from Chernobyl NPP. Change in contribution to absorbed dose rate from external β- and γ-radiation along height of woody plants, depending on time and location of experimental objects in relation to Chernobyl NPP, is analyzed. The important role of external β-radiation in formation of irradiation of crowns of woody plants in first months after radioactive fallout is shown. A decrease in power of absorbed dose of external β- and γ- radiation in studied plantings is proportional to contribution to total radioactive contamination of short-lived radionuclides. Up to 40% of radiation dose absorbed by crowns of woody plants was accumulated in first month after radioactive emissions and up to 60% – during next two. The results of a retrospective assessment of formation of radiation situation in first year after emergency emissions in pine plantations can be used to assess long-term consequences of major radiation accidents on living organisms.
Keywords
Radioactivity, crown surface of woody plants, surface layer of soil, radionuclides, β-radiation, γ-radiation, accidental radioactive fallout, absorbed dose rate, pine stands, emergency releas
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