Application of comprehensive sensitivity analysis method to HLW disposal concept in South Korea

Ebashi, Takeshi; Hwang, Y.-S.*

It is necessary to treat diverse uncertainty due to variability and ignorance properly on performance assessment of geological disposal. One of sensitivity analysis technique to obtain quantitative information is "comprehensive sensitivity analysis method". Information of great influence on result and the combinations of parameter values that results in doses less than the target value is obtainable from using comprehensive sensitivity analysis method. In this study, comprehensive sensitivity analysis method was applied to performance assessment in Korea. The applicability of comprehensive sensitivity analysis method is verified, and moreover, quantitative information to contribute the construction of robust barrier was extracted and was demonstrated. This study on the applicability of method is contributed to efficient R&D planning on stepwise approach of geological disposal. As s result, it was shown to be applicable for extracting quantitative information to build robust barrier with sufficient margin by using a comprehensive sensitivity analysis method.