Development of steady-state fusion reactor by Helical Fusion

The Helical Fusion group (Helical Co., Ltd. in Japan and USA, Inc.) is developing a 50 MWe-class steady-state helical fusion reactor, which kind of stellarator called heliotron composed two continuous coils similar to the large device operated without plasma current. HESTIA plays role pilot plant. first-of-a-kind power plant that would follow will be 100 reactor. After more than one year operation, maintenance completed within 3 months, aiming for an availability larger 80%. High-temperature superconducting magnet are adopted generate 8 T magnetic field at coil center. deuterium-tritium where tritium self-produced using liquid metal blanket systems. first wall including divertor strike zone covered protected by free-surface flow, therefore, individual systems not required HESTIA. Electron cyclotron heating heating. Since current drive required, can low gain ∼13, operation principally possible on order year. few years development phases, prototype planned constructed integrated demonstration before starting construction