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Latest ITER Newsline

  • CODAC | The "invisible system" that makes all things possible

    It is easy to spot all the big equipment going into ITER; what is not so visible is the underlying software that makes the equipment come alive. Local control [...]

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  • Assembly | Zero-gravity in a cramped place

    The volume of the Tokamak pit may be huge, but so are the components that need to be installed. As a result, assembly operators will have very little room to ma [...]

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  • Image of the week | A closer look at KSTAR

    Over its twelve years of operation, the KSTAR tokamak (for Korea Superconducting Tokamak Advanced Research) has built an extremely valuable database for the fut [...]

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  • Pre-compression rings | Six of nine completed

    The European Domestic Agency is responsible for the fabrication of nine pre-compression rings (three top, three bottom and three spare). The first five have bee [...]

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  • Industrial milestone | Japan completes the first D-shaped coil of the ITER Tokamak

    In a ceremony on 30 January, a major industrial achievement was celebrated in Japan—the completion of the first 360-tonne D-shaped toroidal field coil for the I [...]

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Of Interest

See archived entries

What a difference ten days make

There was a time when progress in Tokamak Complex construction was easy to follow. Excavation in 2010; the creation of the ground support structure and seismic foundations from 2010 to 2014; the achievement of the concrete "floor" (the B2 slab) in 2014; and finally the erection of the first levels of the Tritium, Tokamak and Diagnostics buildings—each operation appearing to the non-specialist as having obvious and clearly defined parameters*.

On 9 June, one wonders what to make of this giant ''wool ball,'' half concrete and half steel. (Click to view larger version...)
On 9 June, one wonders what to make of this giant ''wool ball,'' half concrete and half steel.
Things began to change with the construction of the Tokamak bioshield, the massive circular structure at the centre of the Tokamak Complex. As intricate formwork was installed all around to match the advancing work, what was happening inside the "Pit" became harder and harder to ascertain. Seen from one of the worksite cranes on 9 June, the complexity around the bioshield seems to reach an all-time high: what to make of this giant "wool ball," half concrete and half steel?

Ten days later, with a large part of the formwork and scaffolding removed, the details of the Tokamak bioshield have at last become easier to "see" for the non-specialist. The two above-ground levels are now clearly defined: Level 1 (L1) can be distinguished by the oval openings created for the neutral beam injection system; Level 2 (L2) has regular 4-by-4-metre penetrations that will allow system equipment such as magnet feeders, remote handling, heating and diagnostics to reach the machine.

In some places, steel rebar is already in place for Level 3 (L3), which will rise eight metres above L2. Contrary to L1 and L2 it will be a "blind wall," with no penetrations whatsoever.

Ten days later, with a large part of the formwork and scaffolding removed, the details of the Tokamak bioshield have at last become easier to ''see'' for the non-specialist. (Click to view larger version...)
Ten days later, with a large part of the formwork and scaffolding removed, the details of the Tokamak bioshield have at last become easier to ''see'' for the non-specialist.
Looking down into the "arena" we can see new steel structures and a small overhanging workshop that are in place for the installation of a temporary cap that will completely remove the basement levels inside the bioshield from our view. Its purpose is to protect workers at the B2 level as they create the reinforced concrete crown that will support the cryostat and—ultimately—the vacuum vessel.

As a result, this photo offers one of the last opportunities to peek into the depths of the "well" that will accommodate the machine.

*Retrace the history of Tokamak Complex construction on the Building ITER section of our website (Construction Archives).



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