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Latest ITER Newsline

  • Fusion world | ORNL researchers excited to be part of history at JET

    As part of a long-running collaboration, the US Oak Ridge National Laboratory is supporting landmark experiments aiming for a fusion milestone at JET. This summ [...]

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  • Portfolio | It's happening in the pit

    There has always been something breathtaking about the vast cylindrical volume that will accommodate the ITER Tokamak. When it was empty, it felt like a high-te [...]

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  • Image of the week | First weld for the top lid

    Of the four sections that make up the ITER cryostat, the top lid is the thickest, second heaviest (more than 700 tonnes) and most structurally complex. On Monda [...]

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  • Vacuum vessel welding | Contract awarded to Spanish company

    The ITER Organization has concluded a contract with the Spanish company ENSA (Equipos Nucleares SA) for the welding of the ITER vacuum vessel. ENSA is no stran [...]

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  • Spherical tokamak | MAST's divertor concept yields positive results

    During the first months of experimentation on the MAST Upgrade tokamak in the United Kingdom, an innovative plasma exhaust concept has demonstrated positive res [...]

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Of Interest

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Image of the week

Bearings unveiled

The construction teams are in the last stages of preparing the Tokamak pit for the first major operation of ITER machine assembly: the lowering of the cryostat base onto supports in the Tokamak pit. Around the concrete "crown," female lugs have been precisely adjusted, and the protective coverings have been removed from the 18 cryostat bearings that were installed six months ago.

With their protective coverings removed, the 18 cryostat support bearings that dot the crown like jewels are clearly visible. (Click to view larger version...)
With their protective coverings removed, the 18 cryostat support bearings that dot the crown like jewels are clearly visible.
The circular shape at the very centre of the pit is a set of deeply embedded plates designed to anchor the central column of the in-pit assembly tool. This tool will support, align, and stabilize the vacuum vessel sub-assemblies as they are progressively joined and welded.

The cryostat support bearings will act as ball-and-socket joints to allow the smooth transfer of the tremendous forces that will be exerted on the machine in all types of situations. (Click to view larger version...)
The cryostat support bearings will act as ball-and-socket joints to allow the smooth transfer of the tremendous forces that will be exerted on the machine in all types of situations.
By mid-week, the Tokamak pit will be perfectly clean and ready to receive the 1,250-tonne cryostat base, an operation both delicate and spectacular that will open a new chapter in the history of ITER.



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