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Registration Number

0215U003434, 0110U002861 , R & D reports

Title

Study of radionuclides migtatiom in cultural and natural phytocenosises at the late phase of the аccident.

Head

Yuriy Ivanov,

Registration Date

30-01-2015

Organization

National agricultural university of Ukraine

Description

The object of researches - meadows ecosystems on the territory of Exclusion zone and the zone of the absolute resettlement (EZZAR), contaminated with radionuclides of ChNPP release, assessments of 137Cs and 90Sr re-distribution in components of phytocenosises soil-plant cover, factors, predetermined radionuclides migration. Goal of researches - study and estimation of quantitative characteristics of dynamics of 137Cs and 90Sr re-distribution in components of meadows phytocenosises soil-plant cover at the late phase of radiation accident: radionuclides immobilization in root-inhabited soil layers, radionuclides outfluxes from mentioned soil layers due to vertical migration. Developnent, parameterization and verification of mathematical model of radionuclides migration in phytocenosises soil-plant cover at the late phase of radiation accident. Calculation of forecast assessments. Methods of researches - systematization and analysis of existing data in research area, carrying-out of model-field experiment, soils and plants sampling, gamma-spectrometry and radiochemistry methods of estimation of radionuclides specific activity of samples, statistical analysis. Parameters of dynamics of 137Cs and 90Sr transfer in soil profiles of natural meadows and fallow land of observation reference net in EZZAR territory have estimated, 90Sr peculiar migration in soils on fuel tracks of fallout has shown. Long-term dynamics of processes of 137Cs and 90Sr outflux from root-inhabited soil layers, radionuclides immobilization in soils as well as radionuclides transfer to perennial cereal grasses has studied with the use of 15 contrasted by properties soils. Mathematical model for forecast of accumulation dynamics of 137Cs and 90Sr by perennial cereal grasses at the late phase of radiation accident has developed, parameterized and verified. The use of obtained assessments permit: i) correct planning and realization of rehabilitational measures on resettled territories; ii) adequate forecasting of irradiation doses both to population, living on contaminated territories, and to population in case of planning of its re-evacuation to abandoned area; iii) support of adequate decision on planning and realization of measures for minimization of consequences of ChNPP accident. Results have implemented to: i) State Rnterprise "Chernobyl Center of Nuclear Safety, Radioactive Waste and Radioecology"; ii) department of radiobiology and radioecology of NUBiP of Ukraine (educative process).

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Левчук Святослав Евлогійович
Малоштан Ігов Михайлович
Хомутінін Юрій Володимирович