Development of ITER sector assembly tools and mock-up

ITER sector assembly tools are customized tools for final integration of nine 40° sectors sub-assembled at assembly building and ex-vessel components. These tools include a central column, radial beams and their supports, assembly tools for poloidal field (PF) coils, and pre-compression ring (PCR) assembly tools and so on. The central column was designed to have sufficient strength to support nine 40° sectors and adjustment function of toroidal field coil (TFC). The PF assembly tools were designed also to support temporarily PF5 and 6 coils during sectors assembly duration, and to assembly PF coils to designated position with synchronized lifting and adjustment functions. Synchronized system applied to hydraulic cylinders of TF inner adjustment device and PF coil assembly tools is the key function to make highly precise assembly at final positioning. Hence, mock-ups were fabricated and tested to verify synchronized system of TF inner adjustment device and PF assembly tools. As results of tests, synchronized system operated by solenoid valves and linear sensors was verified to have high-resolution for final assembly of TFC and PF coils.