Safety demonstration test (SR-2/S2C-2/SF-1) plan using the HTTR (Contract research)

Sakaba, Nariaki ; Nakagawa, Shigeaki  ; Takamatsu, Kuniyoshi  ; Takada, Eiji*; Saito, Kenji ; Furusawa, Takayuki ; Tochio, Daisuke ; Tachibana, Yukio ; Iyoku, Tatsuo

Safety demonstration tests using the HTTR are in progress to verify the inherent safety features and to improve the safety design and evaluation technologies for HTGRs, as well as to contribute to not only the commercial HTGRs but also the research and development for the VHTR one of the Generation IV reactors. This paper describes the reactivity insertion test and coolant flow reduction test by trip of gas circulator and partial flow loss of coolant planned in 2004 with detailed test method, procedure and results of pre-test analysis. From the analytical results, it was found that the negative reactivity feedback effect of the core brings the reactor power safely to a stable level without a reactor scram.