炉概念構築に向けて

Feasible approach to the power reactor concept

西尾 敏

Nishio, Satoshi

中心ソレノイドコイルを排除した低アスペクト比のトカマク炉の成立性について述べた。常伝導コイル炉はたとえアスペクト比が低くても、コイルでのジュール損失が炉の経済性を著しく阻害する。一方、強磁場が得られる超伝導コイル炉は、厚い遮蔽体が幾分アスペクト比を高くしても従来トカマクに比べ著しく小型高性能化が期待できることを明らかにした。

Low aspect ratio tokamak power reactor with super-conducting toroidal field (TF) coils has been proposed. A center solenoid coil system and an inboard blanket were removed. The key point was how to find the engineering design solution of the TF coil system with the high field and high current density. The coil system with the center post radius of less than 1 m can generate the maximum field of 20 T. This coil system causes a compact reactor concept, where the plasma major and minor radii of 3.5 m and 1.5 m, respectively and the fusion power of 3 GW.