GTHTR300 cost reduction through design upgrade and cogeneration

設計改良及び熱利用によるGTHTR300の経済性向上

Yan, X. ; 佐藤 博之  ; 上地 優; 今井 良行  ; 寺田 敦彦  ; 橘 幸男 ; 國富 一彦 

Yan, X.; Sato, Hiroyuki; Kamiji, Yu; Imai, Yoshiyuki; Terada, Atsuhiko; Tachibana, Yukio; Kunitomi, Kazuhiko

最新の技術的知見に基づき改良を行いつつ、排熱を淡水化設備に供給した場合の高温ガス炉システムGTHTR300の経済性評価を行った。設計改良による発電効率の5%向上に加えて、原子力機構が提案する多段フラッシュ淡水化設備により製造される水を売ることで得られる収入を考慮することで発電コストを1キロワット当たり2.7セントに低減できることを明らかにした。

The latest design upgrade has incorporated several major technological advances made in the past 10 years to GTHTR300. These advances have enabled raising the design basis reactor outlet temperature to 950C and increasing power generating efficiency by nearly 5% point. Further implementation of desalination cogeneration is made through employing a newly-proposed multi-stage flash process. Through efficient waste heat recovery of the reactor gas turbine cycle, a large cost credit is obtained against the conventionally produced water prices. Together, the design upgrade and the cogeneration result in reducing the GTHTR300 cost of electricity to under 2.7 US cent per KWh.