Safety design approach for the development of safety requirements for design of commercial HTGR

Ohashi, Hirofumi ; Sato, Hiroyuki  ; Nakagawa, Shigeaki  ; Tachibana, Yukio ; Nishihara, Tetsuo ; Yan, X. ; Sakaba, Nariaki ; Kunitomi, Kazuhiko 

The research committee on Safety requirements for HTGR design was established in 2013 under the Atomic Energy Society of Japan to develop the draft safety requirements for the design of commercial High Temperature Gas-cooled Reactor (HTGR), which incorporate the HTGR safety features demonstrated using the High Temperature Engineering Test Reactor (HTTR), lessons learned from the accident of Fukushima Daiichi Nuclear Power Station and requirements for the integration of the hydrogen production plants. The safety design approach for the commercial HTGR which is a basement of the safety requirements is determined prior to the development of the safety requirements. This paper describes the main topics of the research committee, the safety design approaches and the safety functions of the commercial HTGR determined in the research committee.