Based on ITER vacuum vessel structure and related requirements, in-wall shielding are designed as about 8900 individual blocks with different sizes and several different materials distributed over nine vessel sectors and nine field joints of vessel sectors.
As a participant of ITER project, ITER Korea has to supply two ITER vacuum vessel sectors (Sector #6, #1) of total nine ITER VV sectors.
Therefore, prediction and reduction of welding distortion are critical to allow the final assembly with the other Vacuum Vessel Sectors without the production of a full scale prototype.
Assembly in the torus hall started in January 2013, and welding work of the vacuum vessel sectors (seven 40° sectors and two 30° sectors) is currently ongoing on the cryostat base.
The CFETR (China Fusion Engineering Test Reactor) vacuum vessel sectors have high density welded joint, and as-welded size of the vacuum vessel is within a very tight tolerance, prediction of weld distortion is critical to allow the final assembly with the other components.
For this purpose, an active control system based on 18 in-vessel sector coils (SC) is foreseen to suppress the resistive wall modes (RWM).
The SST-1 TF magnets are being assembled in pairs (known as octants) together with a SST-1 vacuum vessel module, sector of 80 K bubble type thermal shields and a pair of outer-inter-coil-structures.
Medium-speed engines further enjoy supremacy in the deep-sea vessel genset drive sector, challenged only in lower power installations by high-speed four-stroke engines.
