Conceptual design of small-sized HTGR system for steam supply and electricity generation (HTR50S)

Ohashi, Hirofumi ; Sato, Hiroyuki  ; Tazawa, Yujiro; Yan, X. ; Tachibana, Yukio ; Kunitomi, Kazuhiko 

JAEA has started a conceptual design of a small-sized HTGR for steam supply and power generation (HTR50S), of which reactor power is 50 MWt and the reactor outlet temperature is 750C, to deploy the HTGR in developing countries at an early date (i.e., in the 2030s). The major specifications of the HTR50S were determined based on its design philosophy, which is to upgrade its performance and to reduce the cost by utilizing the knowledge obtained by the HTTR operation and the GTHTR300 design. The system design of HTR50s was performed to offer the capability of electricity generation, cogeneration of electricity and steam for a district heating and industries. The market potential for the small-sized HTGR in the developing countries was evaluated for the application of the electricity, process heat, district heating and pure water production. It was confirmed that there is enough market potential for the small-sized HTGR in the developing countries.