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

  • Cryoplant | First steps toward commissioning

    Every week since the beginning of November, a tube trailer filled with approximately 4,600 cubic metres (750 kg) of compressed gaseous helium delivers its load [...]

    Read more

  • Training | Seeking the next group of Monaco-ITER Fellows

    Recruitment opens for the next Monaco-ITER Postdoctoral Fellowship campaign on 17 January 2022. If your PhD was awarded after 1 January 2019—or you are about to [...]

    Read more

  • Contemporary art | Venet's "arcs" are as heavy as ITER coils

    A 'conceptual artist' among the most prominent on the art scene today, Bernar Venet is not impressed by massive towering steel structures like those in the ITER [...]

    Read more

  • Image of the week | Final activities on Europe's first sector

    The first vacuum vessel sector produced in Europe will arrive at ITER next year. Five of ITER's nine vacuum vessel sectors are the responsibility of Europe's AM [...]

    Read more

  • Vacuum vessel sector preparation | Lessons learned reduce work time by half

    In life as in the assembly of the ITER machine, 'lessons learned' are what makes progress possible. Gains in wisdom, time, skill, investment can be incremental; [...]

    Read more

Of Interest

See archived entries

ITER vacuum system moves forward

Two major design reviews for the ITER vacuum system took place in December. The successful outcome of both means that the leak detection and leak localization systems and the cryopump cryogenic supply system can move forward to Procurement Arrangement signatures with Europe. (Click to view larger version...)
Two major design reviews for the ITER vacuum system took place in December. The successful outcome of both means that the leak detection and leak localization systems and the cryopump cryogenic supply system can move forward to Procurement Arrangement signatures with Europe.
There was no slowing down for the Vacuum team at the end of last year as two major design reviews for the ITER vacuum system were held over an intense four days.

The first was for the vacuum vessel and auxiliaries leak detection and leak localization system. Liam Worth, responsible for the leak detection and localization system for ITER explains: "Modern tokamaks can be brought down by a mere pinhole in their vacuum system or piping networks. Whether microscopic or visible, holes, cracks and faults cause leaks, which in turn allow air, water or helium to diffuse into areas that are forbidden to them. At best, a leak can seriously degrade the machine's performance; at worst, it can stop operations." The review came after an intense R&D program. "Passing the review," says Liam, "successfully puts ITER's main vacuums in a strong position to support reliable operations."

The second review was for the cryopump cryogenic supply system, which effectively controls the heating and cooling of ITER's 18 cryo-pumps. The largest cryo-pumping systems in the world require the largest cryo-pump cryogen distribution system. At the core of the system are the 12 cold valve boxes that distribute cryogen and gas supplies to each pump. 

Liam Worth, Chair Mike Wykes, Wolfgang Obert and Robert Pearce award Stamos Papastergiou (centre) with a block of the ITER vacuum vessel and an ITER-coloured plastic duck in appreciation for his long-term support in the efforts to minimize the effects of water leaks on tokamaks. (Click to view larger version...)
Liam Worth, Chair Mike Wykes, Wolfgang Obert and Robert Pearce award Stamos Papastergiou (centre) with a block of the ITER vacuum vessel and an ITER-coloured plastic duck in appreciation for his long-term support in the efforts to minimize the effects of water leaks on tokamaks.
Review chair Wolfgang Obert, the Cryogenic Group Leader at JET and the person responsible for the cutting-edge design and operation of JET cryogenics system, commented: "The meeting was well prepared by the ITER Organization and a considerable amount of work had gone into the design. The system can now go forward to Procurement Arrangement, final design and manufacturing milestones."

"The two reviews involved around 100 presentations, even more drawings and documents, and many man years of design preparations," concluded Robert Pearce, ITER Vacuum Section leader. "The panels of experts at each review helped the vacuum team to make absolutely sure that everything is going in the right direction. The positive outcome of both of these reviews is a credit to the ITER Organization and the European Domestic Agency vacuum teams and another large and successful step towards ITER construction."



return to the latest published articles