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News & Media

Latest ITER Newsline

  • 23rd ITER Council | Pace and performance on track

    Working as an integrated team, the ITER Organization and seven Domestic Agencies are continuing to meet the project's demanding schedule to First Plasma in 2025 [...]

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  • Huffing and puffing | Testing the endurance of steering mirrors

    On the computer screen, a set of three metal bellows 'breathe' in a steady rhythm. Nuclear engineer Natalia Casal and materials engineer Toshimichi Omori are on [...]

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  • ITER R&D | News from the Neutral Beam Test Facility

    At Consorzio RFX, where ITER's most powerful external heating system will be tested in advance, activities are progressing well on two distinct test beds. ITE [...]

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  • Vacuum vessel welding | Rehearsing a grand production

    There is a place near Santander, Spain, where one can actually feel what ITER will be like. Although we've seen dozens of drawings and 3D animations, the encoun [...]

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  • Image of the week | A plasma-enlightened training course

    The Vacuum Section hosted approximately 40 people last week from the ITER Organization and the Domestic Agencies for a two-day training session on vacuum. [...]

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Of Interest

See archived entries

In the Tokamak's subterranean world



It's a world that evokes underground quarries, a cathedral carved out of rock, a pyramid's secret chamber... The space between the lower basement slab (B2) and the next-level slab (B1) of the Tokamak Complex is punctuated by 18 giant columns that will rise 30 metres when completed and provide structural support to the Tokamak Building.

In this cavernous space, thousands of embedded plates stud the ceiling, floor and walls like geometric constellations—these will be used to anchor the equipment that must be installed at every level of the building.

The thick walls between the massive columns will house pipe chases, and are made of extra-dense concrete that is formulated with magnetite gravel sourced in Swedish Lapland.

The only sunlight that enters this subterranean realm comes from regular double openings in the bioshield wall, reserved for the magnet feeders that will relay electrical power and cryogens to the ITER magnets.

What is today a vast open space around the Tokamak assembly arena will one day be occupied by the dense piping of the cooling water system primary circuit. Gone will be the cathedral-like space ... replaced by a forest of steel pipes and pumps.


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