Subscribe options

Select your newsletters:

Please enter your email address:

@

Your email address will only be used for the purpose of sending you the ITER Organization publication(s) that you have requested. ITER Organization will not transfer your email address or other personal data to any other party or use it for commercial purposes.

If you change your mind, you can easily unsubscribe by clicking the unsubscribe option at the bottom of an email you've received from ITER Organization.

For more information, see our Privacy policy.

News & Media

Latest ITER Newsline

  • Cooling water system | The tanks within a tank

    Deep inside the bowels of the Tokamak Building, the entrance to one of most spectacular rooms of the whole installation resembles that of a broom cupboard. [...]

    Read more

  • ITER assembly | Last major assembly contract signed

    One year after finalizing two major machine assembly contracts, the ITER Organization has chosen the contractors who will carry out assembly and installation ac [...]

    Read more

  • ITER Science | The towering importance of data

    The most important product of ITER is data, which will be used to produce the information needed to build models for DEMO and commercial reactors—and much more. [...]

    Read more

  • Image of the week | In my arms!

    In late November, one part of the 'shell' that encloses every vacuum vessel sector—a right-hand outboard thermal shield panel—had been mounted on a giant pre-as [...]

    Read more

  • Brexit | The UK will remain part of ITER

    'It was a great Christmas present,' says Ian Chapman, head of the United Kingdom Atomic Energy Authority. Many in the ITER community would agree. The Brexit neg [...]

    Read more

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.


return to the latest published articles