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

  • On site | ITER celebrates important milestones

    On 16 June 2022, the ITER amphitheatre was packed with life again after two years of silence, part of a new project culture initiative called "Commit to De [...]

    Read more

  • Port cell maintenance | A full-scale mockup for dress rehearsals

    Every port in the ITER vacuum vessel has a corresponding port cell in the Tokamak Building. These corridor-like spaces allow heating and fuelling pipes, electri [...]

    Read more

  • Magnets | Have the last pancake!

    After close to five years of intense activity, the winding table at the south end of the European poloidal field coil factory on site is now empty. Last week, t [...]

    Read more

  • 30th ITER Council: Progress in a time of challenge and transition

    The Council chamber on the fifth floor of the ITER Headquarters building resonated once again with the sound of voices as Member representatives gathered for th [...]

    Read more

  • Open Doors Day | Back together again

    After more than two years, ITER has resumed a tradition that dates back to 2007—Open Doors Day. On Saturday 18 June, more than 50 "volunteers," staff [...]

    Read more

Of Interest

See archived entries

Image of the week

The lighthouse in the pit

Like a lighthouse (without a beacon) the central column rises more than 20 metres above the floor of the assembly pit. The massive structure does not belong to the tokamak, however: once connected to an array of nine radial beams it will form the backbone of a 600-tonne temporary tool that will support, align, and stabilize the vacuum vessel sub-assemblies as they are joined and welded. The tool is designed to support a total nominal weight of 5,400 tonnes.

The central column rises more than 20 metres above the floor of the assembly pit. It is one of the most massive tools used in the assembly process. (Click to view larger version...)
The central column rises more than 20 metres above the floor of the assembly pit. It is one of the most massive tools used in the assembly process.
On 27 March 2021, the first and sturdiest segment of the central column (the 70-tonne bottom cylinder) was lowered into the assembly pit and carefully inserted into the circular opening at the bottom of the cryostat base. Metrology confirmed that the structure was placed within 2 millimetres of its nominal position inside of the Tokamak Global Coordinate System (TGCS).

Five months later, on 20 August, the remaining four sections were successively installed and assembled, bringing the column to its full height.

Each of the nine radial beams will be supported by the central column on one side and the concrete bioshield on the other through brackets embedded in the L2 level of the bioshield wall. On 30 August, the first of these brackets, called a radial beam support, was successfully installed in port cell #12.

The port cells are numbered at the top of the assembly pit (photo). Once all nine vacuum vessel sub-assemblies are in place, the central column will be removed. In its place, operators will install the central solenoid. (Click to view larger version...)
The port cells are numbered at the top of the assembly pit (photo). Once all nine vacuum vessel sub-assemblies are in place, the central column will be removed. In its place, operators will install the central solenoid.
Everything is in place for a first "insertion" test. Later this week, the overhead cranes will lift a test radial beam (without its load) and insert it into the Tokamak pit in order to confirm the alignment between the central column and the radial beam support. This is one of the 27 steps leading to the installation of the first 1,200-tonne vacuum vessel sub-assembly, planned for late October.

 



return to the latest published articles