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Latest ITER Newsline

  • A world in itself

    From a height of some 50 metres, you have the entire ITER worksite at your feet. The long rectangle of the Diagnostics Building stands out in the centre, with [...]

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  • US completes toroidal field deliveries for ITER

    The US Domestic Agency achieved a major milestone in February by completing the delivery of all US-supplied toroidal field conductor to the European toroidal fi [...]

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  • Thin diagnostic coils to be fitted into giant magnets

    Last week was marked by the first delivery of diagnostic components—Continuous External Rogowski (CER) coils—from the European Domestic Agency to the ITER Organ [...]

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  • Addressing the challenge of plasma disruptions

    Plasma disruptions are fast events in tokamak plasmas that lead to the complete loss of the thermal and magnetic energy stored in the plasma. The plasma control [...]

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  • Blending (almost) seamlessly into the landscape

    Located in the foothills of the French Pre-Alps, the ITER installation blends almost seamlessly into the landscape. The architects' choice ofmirror-like steel c [...]

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Of Interest

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Update on Toroidal Field Coil manufacturing

-Frédéric Savary, TF Coil Section Leader

Regular Radial Plate mock-up in preparation for welding at the contractor SIMIC in Italy. (Click to view larger version...)
Regular Radial Plate mock-up in preparation for welding at the contractor SIMIC in Italy.
A recently held meeting of the Integrated Product Team for ITER's Toroidal Field (TF) Coils highlighted some of the manufacturing milestones reached for the coil structures and the coils themselves. The Chinese Domestic Agency presented the status of their procurement process for the magnet supports for which the call for tender has been launched.

Three contracts are already in place for the fabrication of a full scale prototype for the radial plates. The TF coils use a conductor with a circular outer section that is contained in grooves in so-called "radial plates". There is one radial plate for each double pancake and the conductor is contained in grooves on each side. The radial plates measure 8.7 m x 13.8 m and weigh 5.5 t each. Different manufacturing routes are utilized so that the Domestic Agencies can select the best solution from both the technical and cost point of view before launching into series production.

The manufacturing routes are:
  • hot rolled plates, forgings and powder hipped plates for the raw material;
  • narrow gap TIG welding, electron beam welding and laser welding for the assembly of the radial plate segments;
  • finish machining either before or after assembly and welding of the segments, eventually with a portal machine along the entire perimeter of the RP.
Forging of a curved Radial Plate segment to be delivered to CNIM in France. (Click to view larger version...)
Forging of a curved Radial Plate segment to be delivered to CNIM in France.
One contract has been placed with the company SIMIC S.p.A. in Italy, the second contract is with the company CNIM in France and the third one is with the company Toshiba in Japan. Regarding the winding for the TF double pancakes, the company Toshiba is completing the optimization of the winding parameters with a dummy conductor and will start the fabrication of a 1/3rd scale double pancake winding in a few weeks. This double pancake winding will then be utilized for a vacuum pressure impregnation trial.


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