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News & Media

Latest ITER Newsline

  • Real-time collaboration delivers for fusion computing

    A key computing system for ITER is now being trialled at the European tokamak JET, following collaboration betweenteams at the UK's Culham Centre for Fusion Ene [...]

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  • The balance of power

    It comes as no surprise that the French railway operator SNCF is the largest consumer of electricity in the country—it takes a lot of megawatts to power 500 sup [...]

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  • "Dummy" winding takes shape

    As orange lights flash and machines softly hum, layer one of a 'dummy' pancake winding (the building block of a poloidal field coil) is taking shape on the wind [...]

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  • As big (and heavy) as a whale

    It was pouring when the two 35-metre-long quench tanks were delivered to the ITER site at 2:12 a.m. on Thursday 24 November. And it was still raining heavily on [...]

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  • A passage to India

    108 days, 10,200 kilometres, 16 countries, and only two flat tires. These are the remarkable statistics of a no-less-remarkable journey: a father and son who tr [...]

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Of Interest

See archived articles

The largest fridge around

-Sabina Griffith and Bharat Doshi, Cryostat Section Leader

Welded together from thick stainless steel plates measuring between 40 and 180 millimetres, the ITER cryostat will be the world's largest stainless steel high-vacuum chamber. (Click to view larger version...)
Welded together from thick stainless steel plates measuring between 40 and 180 millimetres, the ITER cryostat will be the world's largest stainless steel high-vacuum chamber.
This week, on Tuesday, 6 September, the Indian Domestic Agency ITER India signed the Procurement Arrangement for the ITER cryostat, which will be the world's largest high-vacuum chamber, worth approximately EUR 100 million. It is one of the project's largest procurements and thus represents a significant step towards the construction of ITER.

Welded together from thick stainless steel plates measuring between 40 and 180 millimetres, the cryostat forms the vacuum-tight container surrounding the ITER vacuum vessel and superconducting magnets. The massive structure will have to withstand a vacuum pressure of 1 x 10 -4 Pa; the pump volume is designed for 8,500 m3; and it will have a weight of 3,400 tons. It will have an outer diameter of 28.54 metres and be almost 30 metres tall.

The head of the Indian Domestic Agency, Shishir Deshpande, and his team signing the Procurement Arrangement this week. (Click to view larger version...)
The head of the Indian Domestic Agency, Shishir Deshpande, and his team signing the Procurement Arrangement this week.
The steel cylinder will have 23 penetrations allowing access inside of the cryostat for maintenance, as well as over 200 penetrations—some as large as four metres in size—providing access to the vacuum vessel for cooling systems, magnet feeders, auxiliary heating, diagnostics, and the removal of blanket and divertor parts. Large bellows are used between the cryostat and the vacuum vessel to allow for thermal contraction and expansion in the structures.

Due to size and weight limitations, the Cryostat will be manufactured in segments in India and a sub-assembly of four sections will be prepared at ITER's site workshop. (Click to view larger version...)
Due to size and weight limitations, the Cryostat will be manufactured in segments in India and a sub-assembly of four sections will be prepared at ITER's site workshop.
Due to size and weight limitations, the cryostat will be manufactured in segments in India and a sub-assembly of four sections will be prepared at ITER's site workshop. Finally, the four sections will be assembled into the Tokamak Pit.

The Cryostat Procurement Arrangement was number 59 on ITER's list, bringing to 71 percent the amount of in-kind procurements signed to date for the ITER Project.


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