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News & Media

Latest ITER Newsline

  • A wide angle on progress

    Whether captured from the top of a crane or from a drone hovering at an altitude of a few dozen metres, the ITER site isalways spectacular. After almost seven y [...]

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  • Inside the arena

    A visit to the deep "well" where the ITER Tokamak assembly will begin next year begins with a journey underground ... through a maze of giant pillars, [...]

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  • 10,000 tonnes of magnets to cool

    In ITER, huge volumesof liquid helium will be circulated throughout a complex, five-kilometre network of pipes, pumps and valves to keep the 10,000-tonne magnet [...]

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  • Heaviest convoy yet

    The triple convoy that reached ITER on Thursday 13 April wasthe heaviest ever organized since the beginning of "highly exceptional" deliveries in Janu [...]

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  • Gouging the giant's eye

    On the side of the ITER bioshield that faces the main ITER office building, four large openings have been preserved to allow passage for the neutral beam inject [...]

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Of Interest

See archived articles

Review affirms robust design of ITER's Cryolines

-Sabina Griffith

Natural (-10 °C) and artificial (-269 °C) cooling: the international review panel in action last week. (Click to view larger version...)
Natural (-10 °C) and artificial (-269 °C) cooling: the international review panel in action last week.
The fact that inside a fusion device it gets hotter than in the core of the sun leaves Hans Quack pretty cold. "Fusion is in fact 40 percent cryogenics," he says, and—being a Professor for Refrigeration and Cryogenics at the University of Dresden—he knows.

At JET, cryogenics was already used for the vacuum cryopanels and for the handling of the fuel. The next step—using cryogenic refrigeration for the superconducting magnets—was pioneered at EAST, KSTAR and Wendelstein. But the ITER cryogenic system is an order of magnitude larger and much more complex than what has been built before, and is only comparable to the cryogenic system of the LHC at CERN.

The ITER machine will rely on a Cryoplant, which will produce the required cooling power, and a cryo-distribution system to distribute the helium coolant to ITER's high-field magnets, cryopumps and thermal shields. "Cryolines will be crossing into the reactor," says Hans Quack "a situation that you don't have in a fission device."

This complex and sophisticated system of cryogenic transfer lines and manifolds was the subject of discussion at the ITER Headquarters last week during the Conceptual Design Review of ITER's cryolines that was chaired by Hans Quack, and that brought together many international experts. "The very good level of preparation was recognized by the reviewers," said Luigi Serio, Responsible Officer for ITER's Cryosystem, summarizing the review. "We are now sure that we have a robust design and that we can proceed with procurement of the cryolines for ITER."

The Procurement Arrangement is expected to be signed at the end of this month.


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