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News & Media

Latest ITER Newsline

  • The crown | Unique but inspired by history

    On the floor of the vast amphitheatre that will accommodate the ITER machine, one of the most complex and most strategic structures of the Tokamak Building is t [...]

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  • Image of the week | Moving into place

    The two quench tanks that were sitting in the holding area on the edge of the ITER premises near the car park moved onto the ITER platform today. A remotely [...]

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  • Construction | ENGAGE celebrates 8 years at ITER

    On 13 April, the ENGAGE consortium celebrated its eight-year anniversary at ITER. The celebration itself was unique: hosted at the offices of La Provence, the d [...]

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  • Plasma physics | Be clean, be strong

    To achieve maximum fusion efficiency in a tokamak device it is essential to limit the impurities in the plasma. But this can be a challenge, as interaction betw [...]

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  • Coil power supply | Switching network tested in Russia

    Plasma could not be created in the ITER vacuum vessel without switching network units, whose operation creates the voltage that 'ionizes*' the cloud of fuel ato [...]

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Of Interest

See archived articles

Tokamak Complex

A temporary roof for the bioshield

In August of last year, a circular platform—the "lid"—was installed deep inside of the ITER bioshield, effectively splitting the well-shaped work area into two. The 140-tonne steel structure was designed to protect the workers active in the basement levels while offering storage for the activities underway on the four above-ground levels.

It took three hours for the eight hydraulic jacks, positioned on platforms anchored to the bioshield wall, to pull the 140-tonne ''lid'' to the top of the massive concrete structure. (Click to view larger version...)
It took three hours for the eight hydraulic jacks, positioned on platforms anchored to the bioshield wall, to pull the 140-tonne ''lid'' to the top of the massive concrete structure.
Now, as teams are preparing for the pouring of the concrete crown and buttressing walls at the lowest level of the Tokamak assembly arena, it was time to hoist the lid some 20 metres to the very top.

The same technique that was used in September 2015 to lift the 800-tonne roof of the Assembly Hall was implemented last Friday 9 March to raise the structure centimetre by centimetre, carefully maintaining its perfectly horizontal position.

The ''lid'' will remain in its present position until April 2020 when it will be removed to allow components into the assembly pit. (Click to view larger version...)
The ''lid'' will remain in its present position until April 2020 when it will be removed to allow components into the assembly pit.
Eight hydraulic jacks—positioned on sturdy platforms distributed around the top of the bioshield—slowly pulled on cables that were attached to the lid in an operation lasting three hours.

The bioshield's new "roof" will remain in its present position until April 2020, when the lid will be removed in preparation for the first components to be delivered for installation by the overhead handling cranes.

Click here to read a related report on the European Domestic Agency website.


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