Subscribe options

Select your newsletters:

Please enter your email address:

@

News & Media

Latest ITER Newsline

  • Port cells | All 46 doors in place

    In ITER, ordinary objects and features often take on an awesome dimension. Take the doors that seal off the port cells around the Tokamak for instance. Doors th [...]

    Read more

  • Toroidal field coils | Two make a pair

    One of the essential 'building blocks' of the ITER Tokamak is the pre-assembly of two toroidal field coils, one vacuum vessel sector and corresponding panels of [...]

    Read more

  • Industrial milestone | Cryostat manufacturing comes to an end in India

    With a flag-off ceremony on 30 June, India's L&T Heavy Engineering marked the end of an eight-year industrial adventure—the manufacturing of the ITER cryost [...]

    Read more

  • Local partners | A celebration for ITER's "vital artery"

    ITER is made possible through the work of thousands of scientists, engineers, workers of all trades and industries across the globe. It is also made possible by [...]

    Read more

  • Photo reportage | Travelling with a coil

    From the salt marshes of the inland sea Étang-de-Berre to the rolling hills around the ITER site (with a view of some of the highest alpine summits) an ITER con [...]

    Read more

Of Interest

See archived entries

Standardization: vacuum components open the way

K.D.

Three all-metal ultra-high vacuum valves were received in May for testing. Through a bulk purchase agreement signed with VAT, valves meeting ITER Organization requirements are now part of the company catalogue. (Click to view larger version...)
Three all-metal ultra-high vacuum valves were received in May for testing. Through a bulk purchase agreement signed with VAT, valves meeting ITER Organization requirements are now part of the company catalogue.
In taking delivery this month of the first batch of all-metal ultra-high vacuum valves, the ITER vacuum team celebrated a number of "firsts."

Not only were the valves received in the basement laboratory of ITER Headquarters on 17 May the first developed with industry to meet ITER's demanding vacuum requirements, but they were also the pioneer samples of a standardization program that will make a catalogue of ITER-approved all-metal valves available to the Domestic Agencies at preferential prices.

In ITER, approximately 250 all-metal high-vacuum valves will be employed on the machine. By standardizing these critical components the ITER Organization is ensuring a simplified design, a smaller number of interfaces, and increased reliability—all at reduced cost.

Standardized components are easier and less expensive to procure, due to the "bulk" nature of purchases. In 2014, the ITER Organization signed a EUR 25 million Strategic Agreement with the vacuum valve company VAT. After just over one year of development, valves meeting ITER Organization requirements have been commercialized and are now part of the VAT catalogue. The valves will be available for order by the ITER Organization and Domestic Agencies at preferential rates. Similar standardizations are planned for other vacuum system components such as gauges and elastomer high-vacuum valves.
In the months ahead, the valves received on site will be tested to ensure that they meet ITER technical specifications and to explore the operational envelope(s) of the valve(s).

"The valves will undergo a complex stress analysis as well as mechanical testing to fully validate them for their many applications on ITER," says Liam Worth, a member of ITER's Vacuum Section. According to Graeme Vine, responsible officer for the valve testing program, testing will also include shaking that mimics seismic events and helium leak testing on the valves to verify leak-tightness. Representative samples of each valve type will be sent to ITER by VAT for testing.

"The results of the analysis and testing will provide us with the data necessary to fully design the support structures required for the valves on the machine," emphasizes Robert Pearce, Vacuum Section Leader. "In this way we can ensure the integrity and safety of the valves operation over the life of ITER."


return to the latest published articles