ITER Vacuum Vessel design and construction

CFD analysis of a regular sector of the ITER vacuum vessel. Part II: Thermal-hydraulic effects of the nuclear heat load

“…8). The maximum temperature on the housings is ∼250 • C, thanks to the cooling chan-nel introduced into the housing body, while that of the inner shell does not exceed almost anywhere the 160 • C, which are the typical maximum temperatures estimated in previous simplified analyses [1,8].…”

“…7. This distribution is more accurate than what was used in [1,8], where the estimated nuclear heat load was lower and a purely radial distribution with exponential decay was adopted.…”

“…The ITER vacuum vessel (VV) will be located inside the cryostat and it will house the in-vessel components, providing a high quality vacuum for the plasma and the first confinement barrier [1,2]. The VV is a double-wall structure where the volume between the inner and outer shells is designed to allow the circulation of the cooling water through a complicated structure including the in-wall shielding (IWS) made of borated stainless steel plates.…”

Design and manufacture of the ITER Vacuum Vessel

“…Electron beam (EB) welding will be widely used to minimize welding deformation and the weld layout needs to satisfy the non-destructive examination (NDE) requirements by the RCC-MR code. The design modifications and optimizations made by ITER can be summarized as follows [1,4]. (a) Increased size and/or modified shape of BM support keys, adjustments of flange sizes and layout of welded joints; (b) IWS supporting platform design improvements; (c) Adjustment of cooling holes in toroidal and poloidal ribs; (d) Design simplification of the triangular support with cooling/drain lines added; (e) Design optimization of supporting rails for IVC and Blanket manifolds and IVC feedthroughs; (f) Port stub configuration optimized; (g) Upper port plug supports added; (h) Lower port modification to avoid interference with a PF4 coil feeder; (i) Other local design changes and corrections.…”

“…The IVC system consists of ELM stabilization coils and vertical stabilization coils (VS coils) [3,4]. The ELM control coils include three rows of nine sets corresponding toroidally to the 40 degrees spanning VV sectors (Fig.…”