THE LEVELS OF CS-137, SR-90, PU-239,PU-240 AND AM-241 IN SOIL SOLUTIONS AS A CRITERION OF RADIONUCLIDE MOBILITY

The results of the investigation of Cs-137, Sr-90 Pu-239,Pu-240 and Am -241 distribution between solid and liquid phases of different types o f soils contaminated as a result of Chernobyl catastrophe are presente d. It was shown the content of radionuclides in the pole moisture and its change along the soil profiles are in accordance with content and distribution of radionuclide mobile forms in the soils. It was reveale d that the level of radioactive contamination and water capacity of so il, the content of potassium, calcium and mobile humic components in t he soil solution are the most important characteristics governing supp ly of radionuclides into the pore moisture. It was established that th e distribution coefficients of radionuclides can be used as criterions of their mobility at the territories with different soil cover irresp ective of the levels of radioactive contamination.