R&D to improve accuracy of nuclear prediction for HTGR, 1; Experiment of first mock-up reactor with graphite system in KUCA

Fukaya, Yuji   ; Goto, Minoru  ; Nakagawa, Shigeaki  ; Nakajima, Kunihiro*; Takahashi, Kazuki*; Sakon, Atsushi*; Hashimoto, Kengo*; Sano, Tadafumi*

To improve accuracy of nuclear prediction for HTGR, we performed the critical experiment and reactor noise measurement to obtain HTGR nuclear characteristics by configuring the graphite moderation system mock-up core at the solid moderator rack (B rack) in Kyoto University Critical Assembly (KUCA). This report states the overview of the criticality experiment and future perspective of this R&D.