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Migration of Radionuclides 85Sr, 137Cs and 60Co in Unsaturated Chinese Loess - A Laboratory Simulation Experiment

As part of a co-operative research project on safety assessment method for shallow land disposal of low level radioactive wastes between the China Institute for Radiation Protection (CIRP) and the Japan Atomic Energy Research Institute (JAERI), a laboratory simulation experiment was performed with an undisturbed soil column 1,340 mm long and 280 mm in diameter under artificial sprinkling condition with a rainfall density of 2,907 mm/a to investigate the migration behaviour of radionuclides Sr, Cs and "'Co in unsaturated Chinese loess. During the simulation experiment, the vertical concentration distributions of radionuclides Sr, Cs and '"Co were detected with a γ detector by rotating the column slowly. When the experiment was completed, the vertical concentration distributions of these radionuclides were determined with a destructive determination method.