INVESTIGATION OF *991*993*997Cs MIGRATION IN SOIL FOR ADVANCING METHODS OF FORECASTING RADIATION DOSES TAKEN BY POPULATION INHABITING RADIOACTIVE ZONE OF TRACE OF CHERNOBYL ATOMIC ELECTRIC POWER STATION ACCIDENT

The laws of a convective-diffusive transfer of the radionuclide in the soil layer have been established; their distinguishing feature is that the vertical profiles of concentration are described considering the processes of an out burst of contaminants onto the soil, removal of radionuclides from the soil by a vegetative mass and its natural radioactive decay. Equations and estimation relationships have been obtained for determining a mean rate of convective radionuclide transfer, a coefficient of an effective diffusion and a constant of the rate of the radionuclide interchange processes in the soil. Space coordinates of points of the vertical profiles of the radionuclide concentration in the soil have been defined, which makes it possible to evaluate the kinetic parameters of the nuclide migration in the soil on the basis of the existing base of data received at the stations of the State Radioecological Monitoring Service. A PC software system has been devised. The basic issues of an conclusions made in the work can be recommended for use in the ecological administration services while developing measures for rehabilitating the territories suffered from the accident on the Chernobyl atomic electric power stationAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio