Migration parameters and their evaluation and estimation methodologies of safety-relevant radionuclides for performance assessment of Japanese geological disposal of HLW and TRU waste

Kitamura, Akira  ; Tachi, Yukio  

Many radionuclides have been selected as safety-relevant radionuclides for Performance assessment of Japanese geological disposal of HLW and TRU waste. Reliable migration parameters of these radionuclides should be evaluated and estimated. Examples of proposed methodologies on evaluation and estimation of migration parameters will be presented. Tremendous efforts have been made to evaluate and estimate the reliable parameters as described above. Required resources are generally increase with increasing the number of elements of interest. Therefore, reduction of safety-relevant radionuclides may be effective to reduce the efforts.