The main functions of the ITER Vacuum Vessel (VV) are to provide the necessary vacuum for plasma operation, act as first nuclear confinement barrier and remove nuclear heating. The design of the VV has been reviewed in the past two years due to more advanced analyses, design modifications required by the interfacing components and R&D. Following the signature of four Procurement Arrangement (PAs), the manufacturing design of the VV sectors, ports and In-Wall Shielding (IWS) is being finalized and the fabrication of the VV sectors has been started in 2012.
ITER vacuum vessel is a double comprising of inner and outer shells. Space betw is filled up with ITER vacuum vessel In-Wall S to, (i) provide neutron shielding to toroidal mag and (ii) reduce toroidal magnetic field ripple. T 8960 IWS blocks of different sizes, shapes distributed over nine vessel sectors and corre field joints. Manufacturing of IWS requires va like water jet cutting, precision CNC machining tight tolerances, accurate dimension measu welding, full penetration welding, Non Destruct Various IWS mock ups are manufactured to validate manufacturing and inspection pro sufficient experience gained from manufacturin mock ups, final manufacturing of IWS has s Avasarala Technologies Limited, India. This p important features of IWS design, results manufacturing, optimization of manufacturing processes, assembly and progress of manufacturing.
Keywords-IWS, Ferromagnetic inserts, neu toroidal magnetic field ripple, borated steel, crevicI.
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