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Latest ITER Newsline

  • Men of measure

    'Neither snow nor rain nor heat nor gloom of night stays these couriers from the swift completion of their appointed rounds.' [From the Greek historian Herodotu [...]

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  • The end of a nine-year journey

    In December, as toroidal field conductor unit length #133 came off the production line, the ITER community celebrated a major milestone—the end of a nine-year p [...]

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  • The little coupler that could

    Concrete and steel met at the end of the 19th century, never to part again. From their encounter a new material was born that revolutionized construction techni [...]

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  • The radio power house

    The steel structurethat's being erected against the northeast side of the Assembly Hall is for a large building that will be densely packed with power supplies [...]

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  • Spaceport ITER

    At nightfall, when buildings, work areas, roads and parking lots light up, the ITER site looks like an alien spaceport. Drenched in the yellow glow of sodium l [...]

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Of Interest

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Lip Seal Project delivers first hardware

The Lip Seal Project team: Timmo Määta, Kalervo Leino, Esa Leskelä, Robin Le Barbier, Bruno Levesy and Jean-Pierre Martins. (Click to view larger version...)
The Lip Seal Project team: Timmo Määta, Kalervo Leino, Esa Leskelä, Robin Le Barbier, Bruno Levesy and Jean-Pierre Martins.
The ITER Vacuum Vessel will have 18 upper, 17 equatorial and 9 lower ports to allow access to the plasma for diagnostic, heating, pumping systems and maintenance. Welded "lips" made out of 2 mm thick stainless steel will seal the port plugs and confine the ultra-high vacuum inside the vessel.

An illustration showing the tig-welding of the lip seal... (Click to view larger version...)
An illustration showing the tig-welding of the lip seal...
In order to develop the appropriate cutting and welding techniques for the lip, the ITER Organization launched an R&D project together with the Finnish company VTT called the "Lip Seal Project." This week, the first two mockups arrived at the ITER site. They were manufactured at the VTT facility using a robotic arm especially adapted to the port's high-vacuum and nuclear environment.

...and the laser-welding technique. (Click to view larger version...)
...and the laser-welding technique.
The laser welded mockup successfully passed the tests for qualification and leak tightness, which was a big milestone for Bruno Levesy, the responsible engineer, and the team from VTT.

Click here to watch the movie on the Lip Seal welding technology produced by VTT.


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