Development on nuclear design model for detailed design of clean burn HTGR

Fukaya, Yuji   ; Goto, Minoru  ; Nishihara, Tetsuo 

A development on nuclear design model for detailed design of Clean Burn HTGR had been performed. In the previous study, the fuel composition assumed in the study of Deep Burn proposed by GA in U.S. was employed. In the present study, that is estimated to reflect the situation of the nuclear fuel cycle in Japan. And, the evaluation method is refined from the viewpoint of traceability and a guarantee of quality. The deployment of control rod columns is investigated. Moreover, the Er loading is also investigated to obtain negative temperature coefficients in all range of operation. This model is developed for MVP code, which solves neutron transportation by Monte Carlo method. Validation of burn-up chain is also performed to adopt very high burn-up calculation. The core design is performed by COREBN code, which solves neutron diffusion equation by deterministic approach. Thus, the convertor which converts the cross section of MVP to COREBN is also developed.