Subscribe options

Select your newsletters:


Please enter your email address:

@

News & Media

Latest ITER Newsline

  • Worksite postcards | Under fog and autumn light

    Due to its proximity to the Durance River and to the narrow gully spanned by the Bridge of Mirabeau, the area around ITER often experiences a peculiar meteorolo [...]

    Read more

  • Assembly Hall | Another massive paint job

    By the end of December, the massive painting job in the Assembly Hall will be complete and the building's floor will be as white and pristine as the landscape i [...]

    Read more

  • ITER India | Testing a neutral beam for diagnostics

    Every 23 seconds during fusion operation, a probe beam will penetrate deep into the core of the ITER plasma to aid in the detection of helium ash—one of fusion' [...]

    Read more

  • Welded attachments | Follow the laser projections

    How do you position 150,000 welded attachments on to a vacuum vessel the size of a house, each one needing to be accurately placed to less than a 4 mm target? [...]

    Read more

  • Visit | Our neighbour the Nobel

    In 2018, the Nobel Prize in Physics was awarded to Gérard Mourou for his work on ultra-short, extremely high-intensity laser pulses—the so-called 'chirped pulse [...]

    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