Shytyuk K. Evaluation of possibility of the forest management in the ChNPP influence zone on the basis of regularities of the radionuclides behavior in the forest biogeocenoses

Dissertation presents the results of the studies of regularities of behavior of 90Sr and 137Cs radionuclides and their chemical analogues in the components of the forest biogeocenoses at the late phase of the accident. The quantitative parameters of interference of 90Sr and 137Cs their analog chemical elements in the process of distribution in organs and tissues of the wood species have been estimated. The total inventories of 137Cs and potassium in the forest ecosystems of the main types of the site conditions of Ukrainian Polissya have been determined. The role of the site conditions type in formation of contribution of vegetation in involving 137Cs and potassium into the biogeochemical circulation has been revealed. Specifics of distribution of 90Sr, 137Cs and 238Pu, 239+240Pu in the pine biogeocenosis in conditions of the ChNPP exclusion zone have been studied. The highest ability for involving into the biogeochemical circulation was found for 90Sr. The quantitative assessment has been carried out and the dependence of 90Sr TF on the exchangeable calcium content in soil has been formulated. Zoning the territory of the ChNPP exclusion zone according to the levels of the 90Sr specific activity in the pine wood has been performed.