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Latest ITER Newsline

  • Image of the week | Tokamak-sur-mer

    At the height of the heat wave, in late June, surface temperature on the ITER worksite climbed to the 50 °C range. To continue work—and protect workers—a series [...]

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  • Space propulsion | Have fusion, will travel

    The idea of propelling rockets and spaceships using the power of the atom is nothing new: the Manhattan Project in the mid-1940s as well as countless endeavours [...]

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  • Cold fusion | End of story?

    Thirty years ago, two electrochemists at the University of Utah, Martin Fleischmann and Stanley Pons, created a sensation when they claimed they had achieved fu [...]

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  • Magnet feeders | Wave of deliveries ahead

    Several batches of magnet feeder components will arrive from China in September containing elements that need to be received, inspected and readied for installa [...]

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  • Tokamak cooling system procurement | Global team for better efficiency

    A unique work-sharing arrangement is expediting the design and fabrication of ITER's tokamak cooling water system and building the knowledge base that will be c [...]

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Of Interest

See archived entries

Europe's DEMO

What it could be like

It looks like ITER, feels like ITER, but it's not ITER. In this depiction of what the site layout for the next-step fusion machine, DEMO, might look like in Europe, the familiar elements are all in place. But there is one extra building, and that makes all the difference ...

Clad in blue at the centre of the illustration, one extra building makes all the difference: this is where the thermal power generated by the tokamak will be converted to electrical power by way of turbines and alternators—just like in any electricity-producing plant. (Courtesy of EUROfusion and Fusion for Energy.) (Click to view larger version...)
Clad in blue at the centre of the illustration, one extra building makes all the difference: this is where the thermal power generated by the tokamak will be converted to electrical power by way of turbines and alternators—just like in any electricity-producing plant. (Courtesy of EUROfusion and Fusion for Energy.)
DEMO is a concept for an electricity-producing, tritium-generating, long-pulse tokamak one step removed from an actual industrial and commercial fusion power plant.

The ITER Members all have a different notion of what their DEMO could be. A central requirement for the European DEMO, as defined by the EUROfusion roadmap, would be to produce several hundred megawatts of net electricity to the grid (300 to 500 MW), which is approximately ten 3-4 times less than an average nuclear fission reactor. Europe's DEMO would be a "demonstration power plant" to be followed by the first-of-a-kind fusion power plant.

And with careful observation, that is what we are seeing in this illustration, recently produced by EUROfusion and the European Domestic Agency for ITER, Fusion for Energy.

Although larger than ITER, DEMO is organized along the same logic—central Tokamak and Assembly buildings, large electrical switchyard, magnet power conversion buildings, cryoplant with helium storage tanks, and heat removal through large cooling towers. The main departure from the ITER layout is the large blue building in the centre of the illustration.

This building is where the thermal power generated by the DEMO tokamak will be converted to electrical power by way of turbines and alternators—just like in any electricity-producing plant, whether from coal, gas, fuel or nuclear fission.

One other important difference between ITER and DEMO is hidden from view—the breeding system inside the DEMO vacuum vessel that ensures the continuous production of tritium to fuel the fusion reaction, a condition sine qua non for the future of fusion energy.


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