Sensitivity analysis of parameters for engineered barrier and natural barrier; Application of the comprehensive sensitivity analysis method to HLW geological disposal concept

Ebashi, Takeshi; Koo, Shigeru*; Oi, Takao 

In this study, comprehensive sensitivity analysis method was applied to HLW geological disposal concept. In this application, level of importance and successful condition for intended parameters on one barrier were extracted under conservative conditions of parameters on the other barrier, taking into account diverse uncertainties on initial stage of stepwise approach. We achieved analysis results with level of importance and successful condition for intended parameters. In conclusion, the comprehensive sensitivity analysis method can be applied to extraction of sensitivity characteristics on each barrier, under conservative conditions. Such study on the applicability of method and the extracted sensitivity characteristics will contribute to construction of a robust barrier and a scenario analysis for initial stage of stepwise approach.