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

発電・蒸気供給用小型高温ガス炉システム(HTR50S)の概念設計

大橋 弘史 ; 佐藤 博之 ; 田澤 勇次郎; Yan, X. ; 橘 幸男 ; 國富 一彦 

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

日本原子力研究開発機構は、小型高温ガス炉システムの開発途上国等への2030年代の世界展開を目指し、蒸気タービンによる発電,工業プロセスへの高温蒸気、及び地域暖房への低温蒸気供給を目的とした原子炉熱出力50MWt,原子炉出口温度750$$^{circ}$$Cの発電・蒸気供給用小型高温ガス炉システム(HTR50S)の概念設計を開始した。設計の基本思想は、HTTRの試験・運転で得られた知見及びGTHTR300設計の成果を活用することで、商用化に向けた性能向上,コスト低減を図りながら高い先進性を持つ原子炉とすることである。これをもとに、基本仕様を定めるとともに、技術実証の目標を定めた。また、蒸気タービン発電,蒸気タービン発電と地域熱供給、及び蒸気タービン発電と高温蒸気供給のコジェネレーションシステムを対象として、それぞれの系統構成を定めた。さらに、小型高温ガス炉システムの利用に関するエネルギー需要を調査し、開発途上国において小型高温ガス炉システムの需要があることを示した。

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 750$$^{circ}$$C, 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.

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