Behaviour of Radionuclides in Meadows and Efficiency of Countermeasures

The behaviour of radionuclides and the efficiency of countermeasures were dependent on meadow type. The migration of 137Cs proceeds much more slowly in the soil profile on dry meadows than on peatlands and flooded land. The half-life of 137Cs in the root zone changes from 10-25 years. The highest transfer factors in grasslands are obtained for peaty lands and flooded meadows, and minimal ones for dry meadows. The first half-life of 137Cs transfer to plants changes from 2.0 to 2.2 years and the second (slower) half-life changes from 4.0 to 12 years for different meadow types. The countermeasures efficiency in meadows varied from 1.2 to 10.0.