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

  • Art and ITER | Two sisters, two suns and a monument to fusion

    Amid the gentle slopes of Asciano, Italy, there stands a stone window that frames the Sun on the summer solstice. It looks as though it might have always been t [...]

    Read more

  • Staff | The men and women of ITER

    They hail from Ahmedabad and Prague ... from Naka and Moscow ... from Seoul, Hefei, Atlanta and hundreds of other towns and cities across the 35 nations partici [...]

    Read more

  • ITER Talks | All about ITER and fusion

    Beginning this autumn, the ITER Organization will be launching a new video series to inform, inspire and educate. The first video—introducing the series and off [...]

    Read more

  • Image of the week | A majestic components enters the stage

    The floor of the Assembly Hall is an ever-changing stage. Like characters in a grand production, components of all size and shapes make a spectacular entry, pl [...]

    Read more

  • Magnet system | A set of spares for the long journey

    In about five years, ITER will embark on a long journey through largely uncharted territory. Conditions will be harsh and—despite all the calculations, modellin [...]

    Read more

Of Interest

See archived entries

Cryostat

Next phase for lower cylinder

At approximately 250 tonnes, the second tier of the ITER cryostat's lower cylinder represents only 15 percent of the cryostat's total weight. Still, in order to weld together its many segments, no less than 1.3 tonnes of filling metal will be required—another amazing figure that opens a window into the unique world of the super-massive ITER components ...

Working in pairs, one man on either side of the massive steel plates, welders will use approximately 1.3 tonnes of filling metal to finalize the welding of the second tier of the cryostat's lower cylinder. (Click to view larger version...)
Working in pairs, one man on either side of the massive steel plates, welders will use approximately 1.3 tonnes of filling metal to finalize the welding of the second tier of the cryostat's lower cylinder.
Following a traditional coconut ceremony, welding operations began on 21 February in the onsite Cryostat Workshop for the second level (tier two) of the lower cylinder.

Operating in tandem, one on either side of the cylinder's steel plates, welders will progressively fill the 5.2-metre-high, 50-millimetre-wide, trough-shaped seams between the segments using a technique called "butt welding." The total length of the welds for this part of the lower cylinder will add up to 160 metres.

Controlling distortions is always an issue when welding large high-tech components. "In the ITER cryostat, because of the number of openings, ports and penetrations and also because of the sheer mass of welds involved, welding is a considerable challenge", explains Vikas Dube, the responsible officer for manufacturing activities in the workshop.

Welding operations on the second tier of the lower cylinder should be complete by late March and the whole assembly (tiers one and two) is expected to be ready for factory acceptance testing in June.

 


return to the latest published articles