A study on the radiation and environmental safety -Studies on radionuclide migration and distribution in terrestrial ecosystem-

In order to investigate the migrational behaviors of radionuclides deposited onto the farm-land during crop cultures, potato and red pepper were cultured on lysimeters installed in a greenhouse and the solution of mixed radionuclides such as Mn-54, Co-60, Sr-85 and Cs-137 was distributed over the land surface on different growth stages of the crops. For rice, soybean, Chinese cabbage and radish, the second or third year's radio-tracer experiments were carried out. Experimental results on Sr-85 and Cs-137 transfer factors for Chinese cabbage and radish were compared with their root-uptake concentrations calculated using existing methods. Samples of farm-land soils and crop plants were collected in the middle part of Korea and concentrations of several γ-emitters were measured. Soil-to-plant transfer factors of Cs-137 measured in outdoor fields were compared with those from greenhouse experiments. 20 figs, 35 tabs, 58 refs. (Author)