Selection of design basis event for modular high temperature gas-cooled reactor

Sato, Hiroyuki  ; Nakagawa, Shigeaki  ; Ohashi, Hirofumi 

In this study, we investigate a deterministic approach to select design basis events utilizing information obtained from probabilistic approach. In addition, selections of design basis events are conducted for commercial HTGR designed by JAEA. As a result, an approach for selecting design basis event considering multiple failures of safety systems is established which has not been considered as design basis in the safety guideline for existing nuclear facility. Furthermore, selection of design basis events for commercial HTGR has completed.