[AP5] Fusion

3:30 PM - 4:00 PM JST(6:30 AM - 7:00 AM UTC)

[AP5-02-INV] Progress on the HTS Magnet Design for the FAST Project at the Conceptual Design Stage

*Sadanori Iwai¹, Yoshikazu Takahashi¹, Kiyoshi Yoshida¹, Kenzo Ibano², Kenji Tobita³, Takaaki Fujita⁴, Miki Nishimura¹, Satoshi Konishi¹ (1. Kyoto Fusioneerin.Ltg (Japan), 2. The University of Osaka (Japan), 3. The University of Tokyo (Japan), 4. Nagoya University (Japan))

Keywords:

Fusion,Tokamak,HTS,REBCO

The FAST (Fusion by Advanced Superconducting Tokamak) project¹⁾ was initiated in 2024 as a private sector fusion tokamak project in Japan with the collaborators from a variety of expertise fields. The primary objective of this project is to demonstrate the capability of fusion power generation, integrating not only a fusion reactor but also other power plant components, such as a heat extraction system comprising a blanket, a heat exchanger, a turbine, and a plasma exhaust system from D-T fusion power of ~50 MW with a major radius of 2-3 m. The conceptual design stage will be completed by the end of FY2025, and the radial build of the tokamak is on-going, taking into account all constraints relevant to plasma physics, neutronic requirements, and the engineering feasibility of the superconducting magnets and other components. As is customary, the superconducting magnets are composed of the center solenoid (CS), the toroidal field (TF) and the poloidal field (PF) coils. Meanwhile, the magnet cables take advantage of the high current capacity of the REBCO-coated conductors under high magnetic fields (14-16 T for the TF coil) thereby facilitating the compact construction of magnets within constrained spatial dimensions. The presentation will report on the latest progress of the HTS magnet design.

References 1) ”FAST (Fusion by Advanced Superconducting Tokamak)”, Starlight Engine Ltd., 2025, https://www.fast-pj.com/en