Subscribe options

Select your newsletters:


Please enter your email address:

@

News & Media

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 [...]

    Read more

  • 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 [...]

    Read more

  • 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 [...]

    Read more

  • 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 [...]

    Read more

  • 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 [...]

    Read more

Of Interest

See archived articles

Design completed for cryostat auxiliary components

-Cryostat & VVPSS Section

It took a team to bring the design for cryostat auxiliary components to completion. Pictured: members from the ITER Organization central team and the Indian Domestic Agency. (Click to view larger version...)
It took a team to bring the design for cryostat auxiliary components to completion. Pictured: members from the ITER Organization central team and the Indian Domestic Agency.
Under the terms of a Procurement Arrangement signed with the ITER Organization in 2011, the Indian Domestic Agency is supplying the 54 main stainless steel segments of the ITER cryostat, the giant "thermos" that will completely surround the tokamak, provide structural support, and ensure the thermal insulation of the superconducting magnets. The first segments arrived on site in December.

The scope of the procurement also covers two sub-systems—the torus cryopump housing and rectangular bellows. The design and technical specifications for both sub-systems have now advanced to the point where the dedicated technical annex of the Cryostat Procurement Arrangement—Annex B—is approved for the torus cryopump housing and being agreed for the rectangular bellows between the ITER Organization and Indian Domestic Agency.

These accomplishments, which open the way to procurement activities, would not have been possible without close collaboration, transparent communication and a strong common technical understanding between the ITER Organization, the Indian Domestic Agency and industry.

The torus cryopump housing has a number of functions. It supports the torus cryopumps, connects the cryopumps to the torus vacuum, and provides the volume to dilute hydrogen during the cryopump regeneration, maintaining confinement.

The rectangular bellows will be distributed among all port extensions on the three levels of the cryostat rectangular openings. Weighing between 1.8 tons and 5.9 tons each, their role is to seal the cryostat and to ensure the confinement of the vacuum between the cryostat and the port cells and also to compensate for relative displacements between the vacuum vessel, the cryostat, and the building. The development of the rectangular bellows was led by the ITER Organization in conjunction with a specialized bellows manufacturer. Extensive analysis work was performed in order to justify the structural integrity and qualification tests were conducted on several full-size prototypes in order to experimentally verify the compliance with the expansion joint project requirements.


return to the latest published articles