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News & Media

Latest ITER Newsline

  • Building ITER | Halfway to First Plasma

    It's been a long road and we haven't reached our destination yet. But on its way to operation, ITER has just passed a significant milestone: according to the st [...]

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  • Director-General | Visits and an award in Washington

    Keeping the governments and policy makers of the ITER Members informed on the project's progress and challenges is an essential part of the Director-General's m [...]

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  • On-site coil winding | Big, round and red

    It's big, round and red and represents the latest addition to the collection of cranes operating on the ITER construction site. On Friday 8 November, two power [...]

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  • Milestones | Japan completes central solenoid conductor

    The Japanese Domestic Agency has successfully completed the procurement of 43 kilometres (700 tonnes) of niobium-tin cable-in-conduit superconductor for ITER's [...]

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  • Neutral beam test facility | Powerful ion source delivered

    OnSPIDER, one of twotestbeds at the ITER Neutral Beam Test Facility, the negative ion source for ITER's heating neutral beam system will be demonstrated at full [...]

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Of Interest

See archived articles

Vacuum vessel in Europe

Assembling the puzzle

Five thousand tonnes of steel, dozens of "port" openings at three levels, interfaces with nearly every major system ... ITER's steel vacuum vessel is one of the largest-scale and most complex of the ITER "objects" to manufacture.

Assembly work is underway on one of the sub-segments of vacuum vessel sector #5. Vacuum vessel manufacturing is time-consuming and labour intensive due to the sheer volume of sub-elements, their unconventional shapes, and their size. (Click to view larger version...)
Assembly work is underway on one of the sub-segments of vacuum vessel sector #5. Vacuum vessel manufacturing is time-consuming and labour intensive due to the sheer volume of sub-elements, their unconventional shapes, and their size.
In Europe, which is producing five of the nine vacuum vessel sectors, a consortium of industrial firms has divided out the tasks of manufacturing the many sub-elements of each sector, step-by-step assembly activities, and demanding welding and non-destructive examination stages.

With contractors and subcontractors located across Europe, the European vacuum vessel fabrication consortium (see more here) has sought to increase its manufacturing capacity. In a recent article on vacuum vessel manufacturing progress, the European Domestic Agency reports that all five sectors are now in some stage of fabrication, with sector #5—the first due on site according to the ITER machine assembly schedule—leading the pack.

European companies CNIM (France), ENSA (Spain), MAN (Germany), ProBeam (Germany), Belleli (Italy), Mangiarotti (Italy), Walter Tosto (Italy), and Ansaldo Nucleare (Italy) are all involved.

Vacuum vessel manufacturing is time-consuming and labour intensive due to the sheer volume of sub-elements, their unconventional shapes, and their size. At the end of the process, each sector will measure 6.5 metres high, 3 x 6 metres in width and depth, and weigh between 400 and 500 tonnes. Fabrication is a multiyear process that has involved multiple qualification phases before passing on to manufacturing design, material procurement, precise machining, and finally welding. Because the vacuum vessel and ports are classified as nuclear pressure equipment under French ESPN regulations, the welding and non-destructive examination activities are submitted to particularly stringent specifications.

For the European industries involved participation in such a high-profile and demanding manufacturing project has contributed to increasing their expertise and skill base, and improving their competitiveness on world markets. (See related article in this issue.)

Read the full article on the European Domestic Agency website here.


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