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(ITERP/21) Research and Development for the ITER Toroidal Field Coils

E. Salpietro1), on behalf of the ITER Joint Central Team and the EU Home Team
1) EFDA Close Support Unit, Boltzmannstr. 2, D-85748 Garching, Germany

Abstract.  The ITER Toroidal Field (TF) coils are made up of a winding pack enclosed in a case. In the central region the noses of the coils are wedge shaped and fit together to form a circular vault. On the outside an intercoil support structure joins the coil above and below the equator. The goal of the ITER project L2 is to verify the design principles, design procedures, design criteria, operating margins, analysis methods and manufacturing process, including Quality Assurance (QA) capable of application to the ITER TF coils. The project is divided into two subprojects: TF Model Coil (TFMC) construction and testing and TF coil case fabrication demonstration. The conceptual design of the ITER TFMC has been carried out by the ITER EU HT, the engineering design and construction by European Industries. The testing of the TFMC is foreseen in the TOSKA facility at FZK Karlsruhe starting in the first quarter of 2001. The feasibility demonstration of the TF coil case is being carried out also by European industry by: Forging trapezoidal tubes with variable wall thickness, casting new modified 316LN type material for the intercoil structure and the parts of the case subject to lower stresses, qualifying the welding and NDT methods to be applied to the heavy thickness ($ \sim$250mm) to be joined together to form the casing.

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IAEA 2001