Tight Aspect Ratio Tokamak Power Reactor with Superconducting TF Coils
S. NISHIO1), K. TOBITA1), S. KONISHI1), T. ANDO1), S. HIROKI1), T. KURODA1), M. YAMAUCHI1), M. AZUMI1), M. NAGATA2)
1) Naka Fusion Research Establishment, Japan Atomic Energy Research Institute, Naka-machi, Naka-gun, Ibaraki-ken, 311-0193 Japan
2) Himeji Institute of Technology
Abstract.
Tight 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 discarded. 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 3.75 m and 1.9 m, respectively and the fusion power of 1.8 GW.