Application of the comprehensive sensitivity analysis method to a korean geological disposal concept

Abstract

The comprehensive sensitivity analysis method developed by JAEA can be applied to extraction of the threshold values of parameters yielding a “successful condition” where the maximum dose does not exceed a target value with regard to the geological disposal concept of high-level radioactive waste (HLW) and transuranic (TRU) waste in Japan. In this study, as a part of the joint research between JAEA and KAERI, the method was applied to a Korean HLW disposal concept that spent fuel will be directly disposed in a suitable host rock. The purpose of this study was to confirm whether a successful condition can be extracted with regard to the direct disposal concept of spent fuel. As a result, the successful conditions for near-field parameters for a target value were illustrated under a conservative condition of the far field. The comprehensive sensitivity analysis method can be applied to extract a successful condition of the near-field parameters for the direct disposal concept of spent fuel. Furthermore, it was illustrated that dissolution from waste is the potential key issue to complement uncertainty of flow rate. Such an approach will offer insights into construction of a robust system for the direct disposal concept of spent fuel and provide useful information for scenario analysis. © 2008 Taylor and Francis Group, LLC.