Subscribe options

Select your newsletters:


Please enter your email address:

@

News & Media

Latest ITER Newsline

  • Open Doors Day | An intense and unforgettable experience

    Saturday was Jacques's birthday. At age 90, the long-retired engineer from Aix-en-Provence had only one item on his wish list: to visit ITER for a third time an [...]

    Read more

  • Power conversion | A potent illustration of the "One ITER" spirit

    Europe made the buildings; the piping came from India; China and Korea provided the transformers; Russia manufactured the massive 'busbar' network. The ITER Org [...]

    Read more

  • Fusion world | Upgrade completed on DIII-D tokamak

    The DIII-D National Fusion Program (US) has completed a series of important enhancements to its fusion facility, providing researchers with several first-of-a-k [...]

    Read more

  • Vacuum lab | Ensuring leak test sensitivity

    A helium leak test is one of several factory acceptance tests planned for the sectors of the ITER vacuum vessel before they are shipped to ITER. In a vacuum lab [...]

    Read more

  • Bookmark | The Future of Fusion Energy

    To write about fusion is to walk a fine line between the temptation of lyricism and the arid demands of scientific accuracy. Whereas the general media tends to [...]

    Read more

Of Interest

See archived entries

Forging elements of the vacuum vessel

Machining a component of the vacuum vessel at the Mangiarotti plant in Italy. For the first three vacuum vessel sectors alone, over 1,000 steel forgings are on order. (Click to view larger version...)
Machining a component of the vacuum vessel at the Mangiarotti plant in Italy. For the first three vacuum vessel sectors alone, over 1,000 steel forgings are on order.
Manufacturing is underway in Europe on over 1,000 steel forgings that will go into the assembly of the European vacuum vessel sectors. Weighing up to 10 metric tons for the heaviest, and varying widely in size and shape, these forgings are required for the first three vacuum vessel sectors under European responsibility.

At subcontractors Rolf Kind GmbH (Germany), Acciaierie Valbruna (Italy) and ThyssenKrupp (Germany), the process begins with mixing pellets of chromium, nickel and steel to make 316 LN, an ITER-grade of stainless steel with low carbon and high nitrogen content. The mixture is heated to temperatures of approximately 1,500 °C and poured into block moulds for cooling. These blocks are in turn heated to 1,000 °C and formed into the required shape using a technique called hot pressing.

The forgings produced by the sub-contractors will be shipped to Mangiarotti S.p.A and Walter Tosto S.p.A for machining.

The AMW consortium (Ansaldo Nucleare S.p.A, Mangiarotti, Walter Tosto) was chosen in 2010 by the European Domestic Agency to manufacture Europe's contribution to the ITER vacuum vessel—that is, seven of the nine sectors (Korea is producing the two others).

When machining is completed, the forgings will be welded together to create the four segments that make up each vacuum vessel sector (around 300 metric tons of forgings per 500-tonne sector).

See the full article on the European Domestic Agency website.


return to the latest published articles