Subscribe options

Select your newsletters:

Please enter your email address:

@

Your email address will only be used for the purpose of sending you the ITER Organization publication(s) that you have requested. ITER Organization will not transfer your email address or other personal data to any other party or use it for commercial purposes.

If you change your mind, you can easily unsubscribe by clicking the unsubscribe option at the bottom of an email you've received from ITER Organization.

For more information, see our Privacy policy.

News & Media

Latest ITER Newsline

  • Tokamaks | Different approaches around the world

    Look east, look west ... tokamak projects are underway in different parts of the world. All of them are benefiting from and complementing the pioneering work al [...]

    Read more

  • Construction site | A guide to work underway

    Just like the ITER worksite, drone photography is also making progress. This view of the ITER platform is the sharpest and most detailed of all those we have pu [...]

    Read more

  • Vacuum vessel repair | A portfolio

    Whether standing vertically in the Assembly Hall or lying horizontally in the former Cryostat Workshop now assigned to component repair operations, the non-conf [...]

    Read more

  • European Physical Society | ITER presents its new plans

    The new ITER baseline and its associated research plan were presented last week at the 50th annual conference of the European Physical Society Plasma Physics Di [...]

    Read more

  • Image of the week | The platform's quasi-final appearance

    Since preparation work began in 2007 on the stretch of land that was to host the 42-hectare ITER platform, regular photographic surveys have been organized to d [...]

    Read more

Of Interest

See archived entries

Cryostat welding begins

A few weeks ago, the six tier 1 segments of the cryostat base were positioned on an assembly frame in the Cryostat Workshop and readied for welding operations. Using optical metrology, the 50-tonne elements were carefully aligned like so many slices of a giant steel pie, each separated from the next by a 4 millimetre gap to be filled by welding.

The welding of such a giant component is an impressive sight indeed. Welders, crouching or lying, look positively small on the polished steel surfaces of the segments. (Click to view larger version...)
The welding of such a giant component is an impressive sight indeed. Welders, crouching or lying, look positively small on the polished steel surfaces of the segments.
Before the welders could step on the circular stage, however, one last preparatory step needed to be performed: the "coconut ceremony" which, in the Indian tradition, accompanies important occasions and new starts such as a wedding, a journey or ... a construction project.

On Thursday 8 September, when the last of the coconuts had been broken and shared between all participants, the first welding operations for the ITER cryostat could get off to a start.

Welders work in perfectly coordinated pairs—one operating from on top of the 50-millimetre-thick steel plate and the other, invisible, from underneath.<br /><br /> (Click to view larger version...)
Welders work in perfectly coordinated pairs—one operating from on top of the 50-millimetre-thick steel plate and the other, invisible, from underneath.

The welding of such a giant component is an impressive sight indeed. Welders, crouching or lying, look positively small on the polished steel surfaces of the segments. With protective masks that are illuminated by the intense blue light of the electric arc, they work in perfectly coordinated pairs—one operating from on top of the 50-millimetre-thick steel plate and the other, invisible, from underneath.

Throwing a bridge between the high-tech world of ITER and the Indian tradition of times immemorial, participants broke coconuts to call upon the welding operations the blessing of the elephant-headed Ganesha, the ''remover of obstacles.'' (Click to view larger version...)
Throwing a bridge between the high-tech world of ITER and the Indian tradition of times immemorial, participants broke coconuts to call upon the welding operations the blessing of the elephant-headed Ganesha, the ''remover of obstacles.''
As each segment is made of two steel plates joined by a series of ribs, the same welding operations will be performed on both the upper and lower plates.

When all welding operations are completed on the six tier 1 segments, the pedestal ring (which supports the machine) and the "rim" that runs around the base will be added, thus completing, less than a year and a half from now, the single largest load of the machine assembly—the cryostat base.


return to the latest published articles