Method development to evaluate retardation effects of nuclide migration in the near-field host rock

Hayano, Akira  ; Sawada, Atsushi 

The purpose of this study is to contribute to methodology development for evaluating retardation effects of nuclide transport in near-field host rock to flexibly respond to the uncertainty of SDMs. Initially, the methodology for evaluating retardation effects of nuclide transport quantitatively in near-field host rock was developed. Then, the nuclide transport analysis using the data obtained at the surface-based investigation phase of Mizunami underground laboratory project was carried out in order to show the example of application for the methodology. Finally, the impact on results of evaluation caused by the uncertainty of SDMs was considered, and feedback to the investigation of geological environment was given from the result of the analysis of this study.