Interface Detail Design for ITER Coil System

Publisher Summary The ITER superconducting magnet system requires 45 pair of current leads and cryolines for supply of electricity and forced-flow supercritical helium at 4.5K and 6.0 bar. The interface components between coil system and operating facilities such as electricity supply system and cryogenic plant consist of feeder and cryoline, coil terminal box and cryostat feedthrough. These components satisfied the required design condition. This chapter introduces their feasibility and provides detail about design results. The superconducting(SC) magnet system requires interface components between the SC coils and the operating facilities. They consist of the feeders and cryolines, the coil terminal boxes and the cryostat feedthroughs. The conceptual design of the coil terminal boxes is completed and their installation in the tokamak hall pit is acceptable. Accordingly, the length of the feeders and cryolines is shorter and a neutron and radiation shield is needed around the cryogenic feedthrough to prevent the neutron and radiation through the penetration of the cryostat making the coil terminal box radioactive. The SC busbar design takes into consideration manufacturing. Force-cooled current leads are used for connection between normal busbar and the SC busbar on consideration of space requirement. However, removal of its heat leak to the main coolant flow is needed.