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  • Remembering Bernard Bigot, ITER Director-General 2015-2022

    On the ITER site, the machinery of construction was humming just like on any weekday. Workers were concentrating on their tasks, laying rebar for new buildings [...]

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  • Tokamak assembly | Preparing for the Big Lift

    The distance was short but the challenge daunting: on Thursday last week, the first section of the plasma chamber was lifted 50 centimetres above its suppor [...]

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  • Image of the week | 13th toroidal field coil arrives from Europe

    The toroidal field coil procurement effort has been one of the longest of the ITER program, initiated by Procurement Arrangements signed in 2007 and 2008. Manuf [...]

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  • Diagnostics | Final Procurement Arrangement signed

    ITER Diagnostics reached an important milestone in December 2021 when it concluded the last Procurement Arrangement of the diagnostics program. After signing a [...]

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  • On site | A quick visit to the Control Building

    Work is progressing on the ITER Control Building, ergonomically designed for the 60 to 80 operators, engineers and researchers who will call it home.  [...]

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Of Interest

See archived entries

Procurement Arrangement 44 for ITER's thermal shields

Done! ITER Director-General Kaname Ikeda and Kijung Jung, Head of the Korean Domestic Agency after signing the Procurement Arrangement for ITER's thermal shield system. (Click to view larger version...)
Done! ITER Director-General Kaname Ikeda and Kijung Jung, Head of the Korean Domestic Agency after signing the Procurement Arrangement for ITER's thermal shield system.
On Monday, 17 May, Procurement Arrangement #44 for ITER's thermal shield system was signed between the ITER Organization and the Korean Domestic Agency. The thermal shields, a key component for the successful operation of ITER, minimize the heat loads transferred by thermal radiation and conduction from the warm components inside the tokamak to the components and structures that operate at 4.5 K. The shields themselves will operate at approximately 80 K.

A view of the thermal shield system that will protect the vacuum vessel. (Click to view larger version...)
A view of the thermal shield system that will protect the vacuum vessel.
The thermal shield system is made of single-wall stainless steel panels with the cooling pipes welded to the panels. The panels are cooled by 1.8 MPa pressurized helium gas supplied by the cryoplant. Thermal radiation to the superconducting magnets confining the plasma is further reduced by providing a 5 μm thick, low emissivity silver coating on both sides of the shield plates. The shield's surface area covers 10,000 square metres and, once assembled, will stand 25 metres at its highest point.

Signing the contract is one thing. Preparing the road that leads there is another, and many people contributed. (Click to view larger version...)
Signing the contract is one thing. Preparing the road that leads there is another, and many people contributed.
The contract was signed by ITER Director-General Kaname Ikeda on behalf of the ITER Organization and the Director of the Domestic Agency Kijung Jung on behalf of the Republic of Korea. The component will be manufactured under the supervision of the National Fusion Research Institute and is expected to be delivered to the ITER construction site in southern France by late 2016.



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