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  • Computer-Aided Design | A new platform with Australia

    In September 2016, the signature of a Cooperation Agreement between the Australian Nuclear Science and Technology Organisation (ANSTO) and the ITER Organization [...]

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  • Ten years later | A prodigious adventure

    ITER began its existence as an aspiration in the early 1980s, as actors in the fusion community called for the joint machine that would demonstrate the feasibil [...]

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  • Image of the week | An impromptu visit

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  • Cryoplant | How to install a compressor

    In order to properly install a helium compressor skid on its concrete pad, you need to start with a large push broom to sweep away the dust that inevitably accu [...]

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  • Magnetic system | Nine rings to fight the force

    Work on the pre-compression ringsof the ITER magnet system progresses in Europe, where work on a full-scale prototype is underway. These technically challenging [...]

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Of Interest

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Procurement Arrangement 44 for ITER's thermal shields

Sabina Griffith

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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