Systematization from case studies of natural phenomena to impacts assessment on a HLW geological disposal

Kawamura, Makoto; Ishimaru, Tsuneari ; Niwa, Masakazu   ; Komatsu, Tetsuya  

Regarding the selection of the suitable geological environment for geological disposal, not only the evaluation of the activity of the natural phenomena that are currently occurring, but also the prediction of the long-term occurrence and transition of natural phenomena beyond tens of thousands of years after disposal, and It is necessary to properly evaluate the impact on geological environmental conditions. In conducting an appropriate impact assessment, an impact assessment model and scenario will be established. In order to ensure their credibility, it is necessary to clarify the validity of their scientific validity based on the results of case studies. We devised an argument diagram and tried to organize the flow of information. As a result, it was possible to clarify the research contents and results information on necessary natural phenomena and geological environmental conditions for the validity of the set issues, and to clarify the flow of results information for constructing conceptual models and scenarios. In addition, we obtained the prospect of objective judgment on the validity of the evaluation scenario constructed based on the conceptual model.