[Soil-plant linkage and expected doses in humans from incorporated long-lived radionuclides].

The algorithm for calculation of the expected received dose resulted from intake of long-lived 137Cs and 90Sr radionuclides accepted with food has been proposed. The contamination rate and agrochemical type of soils which were involved into trophical chain formation were considered in evaluation of radionuclide level in diet. The calculation of dose loading was made for seven main types of soil in Ukrainian wooded district.

[Statistical criterium of pollution heterogeneity in the research of biotic factors of radionuclides migration].

The nature of the radionuclide contamination resulting from Chernobyl disaster is in its spatial and aggregate heterogeneity determined by the interaction of systematic and incidental factors. To study the radionuclide migration in the soil-plant system, an independent statistical index of contamination heterogeneity H = RAsAp is proposed which is calculated as a Brave-Pirsens coefficient of linear correlation between radioactivity of soil and dry biomass of plants grown on it and which allows to determine relative range of contamination that appears in the form of "hot particles". An adequacy of this index is substantiated, and it is used to analyze the experimental results on radionuclide migration.