The distribution of radionuclides in the vertical sections of the soils inside the 30 km zone of Chernobyl NPP, along the west trace of the fallout

The paper studied the distribution of radionuclides in vertical section made in the black soil of a former garden and arable land on the west trace of the fallout at a distance of 5, 13.5 and 22 km from the 4th power unit of the Chernobyl NPP. It is shown that radionuclide distribution in the sections in the black soil are of a more complex nature than that in the sandy soils. Inspite of the fact that a major amount of radionuclides in the sections is concentrated at a depth of 0-3 cm, there are cases when 5-15 % of radionuclides penetrate into even deeper horizons