Enable Recite

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

  • 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 [...]

    Read more

  • 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 [...]

    Read more

  • 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 [...]

    Read more

  • 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 [...]

    Read more

  • 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.  [...]

    Read more

Of Interest

See archived entries

Cryostat lower cylinder: readied for welding

It is one thing to know that the cryostat will be 30 metres high and 30 metres in diameter; it is another to see these dimensions translated into reality.

Tier one of the cryostat lower cylinder is now assembled and readied for welding. Standing on the scaffolding of the sub-component, which is 30 metres in diameter, workers appear tiny. (Click to view larger version...)
Tier one of the cryostat lower cylinder is now assembled and readied for welding. Standing on the scaffolding of the sub-component, which is 30 metres in diameter, workers appear tiny.
In the Cryostat Workshop, as the first tier of the component's lower cylinder is now assembled and readied for welding, the vision is awesome. Look at how tiny the men standing on the scaffolding at the far end appear ...

And imagine how it will feel when tier two is added, effectively doubling the height. The whole section will be more than 10 metres high and the workers will appear even smaller.

The six 60-degree segments, each weighing approximately 40 tonnes, are now precisely positioned, but their alignment must be fine-tuned before welding operations can begin.

In order to reach the required precision in positioning the sectors, the most sophisticated technologies alternate with the most basic tools. ITER cryostat engineer Guillaume Vitupier is seen here next to the manual screw jacks used to fine-tune the segments' alignment. (Click to view larger version...)
In order to reach the required precision in positioning the sectors, the most sophisticated technologies alternate with the most basic tools. ITER cryostat engineer Guillaume Vitupier is seen here next to the manual screw jacks used to fine-tune the segments' alignment.
As is often the case with ITER components, the techniques involved alternate between the most sophisticated technologies (like laser tracking) and the most basic tools — manual screw jacks, chain slings and winches that will be used to correct the segment profiles and achieve the required sub-millimetre precision.

Once the long and complex alignment operations are finalized, welding will begin. The six 5-metre-high weld gaps between the segments will be filled and tier one of the cryostat lower cylinder will be complete.

Similar operations will be performed on tier two, whose six sectors are due to leave India in mid-September.

Once the lower cylinder segment is complete (tier one and tier two), it will be encased in an airtight cocoon and, pending assembly, stored in a dedicated area adjacent to the Cryostat Workshop.


return to the latest published articles