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News & Media

Latest ITER Newsline

  • Top management | Tim Luce, Head of Science & Operation

    What does a seven-year-old growing up in a small community in Arkansas know about what it means to be an 'atomic scientist'? Probably not much. Except, remember [...]

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  • Blanket shield blocks | Series production milestone in Korea

    It takes many months for a single forged block of stainless steel to be transformed into the complex shape of an ITER blanket shield block, full of gullies, cha [...]

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  • Image of the week | 5 top lid segments expected

    A little less than five years ago, in December 2015, the first segments of the ITER cryostat (out of a total of 54) were delivered to the construction site from [...]

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  • On site | As ITER begins assembly, HVAC becomes mission critical

    Not only will heating, ventilation and air conditioning (HVAC) help protect people and equipment during the assembly phase at ITER, but they will also help ensu [...]

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  • Vacuum vessel | Sector #6 is leak tight

    The first ITER vacuum vessel sector has passed a helium leak test on site with flying colours. Back in March 2020, as experts from the Korean Domestic Agency [...]

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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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