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  • A world in itself

    From a height of some 50 metres, you have the entire ITER worksite at your feet. The long rectangle of the Diagnostics Building stands out in the centre, with [...]

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  • US completes toroidal field deliveries for ITER

    The US Domestic Agency achieved a major milestone in February by completing the delivery of all US-supplied toroidal field conductor to the European toroidal fi [...]

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  • Thin diagnostic coils to be fitted into giant magnets

    Last week was marked by the first delivery of diagnostic components—Continuous External Rogowski (CER) coils—from the European Domestic Agency to the ITER Organ [...]

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  • Addressing the challenge of plasma disruptions

    Plasma disruptions are fast events in tokamak plasmas that lead to the complete loss of the thermal and magnetic energy stored in the plasma. The plasma control [...]

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  • Blending (almost) seamlessly into the landscape

    Located in the foothills of the French Pre-Alps, the ITER installation blends almost seamlessly into the landscape. The architects' choice ofmirror-like steel c [...]

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Of Interest

See archived articles

How to store the fusion fuel

-David Babineau, Tritium Plant Section Leader

 (Click to view larger version...)
A two-day bilateral meeting between representatives of ITER's Fuel Cycle Division and ITER Korea was held in Daejeon, Korea this week to review the requirements to design the Storage and Delivery System within the Tritium Plant and Fuel Cycle. The main purpose of this meeting was to compare the merits and demerits of Zirconium Cobalt (ZrCo) as the hydride material to those of depleted Uranium.

Hydrides are materials - metals in this case - that have the capability of chemically absorbing hydrogen (and its isotopes deuterium and tritium) into their metal lattice structure, thereby acting as a very effective pump at room temperature. Metal hydrides typically store hydrogen at densities higher than in liquid hydrogen. In order to recover the hydrogen (or the deuterium tritium fuel) these metal hydrides must be heated, making them a very safe way to store and deliver tritium and therefore will be used for storage instead of tanks which store hydrogen as a gas.

Since the beginning of the engineering activities for ITER in the 1990s the question of the most suitable metal hydride material is controversially discussed among the experts, During the bilateral meeting, the Korean and the IO team discussed the pro's and con's for the two candidate materials, weighting criteria such as complexity of the components and system design, schedule, costs and additional need for R&D, giving highest priority to safety aspects.

The meeting concluded with a unanimous preference for depleted Uranium. Now it is time to come to a decision about the material that should be used as hydride in ITER.


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