Subscribe options

Select your newsletters:

Please enter your email address:

@

News & Media

Latest ITER Newsline

  • Component delivery| A jewel in a box

    Sailing under the flag of Germany, the Regine is a mighty ship, strengthened for heavy cargo and equipped on its portside with two 750-tonne on-board cranes. Ha [...]

    Read more

  • Education | Make your own tokamak with 3D printing!

    It's not Lego, but it is definitely 'hands-on.' To offer a tangible device to illustrate the workings of magnetic confinement fusion in a tokamak, the ITER Orga [...]

    Read more

  • Worksite | Europe's Fusion for Energy is building the ITER installation

    Anyone driving to ITER can take full measure of the enormity of the project a few kilometers before reaching the destination. Gigantic cranes can be seen from a [...]

    Read more

  • Disruption mitigation | Experts in plasma disruptions gather online

    On 20-23 July, 120 international experts participated in the 1st IAEA Technical Meeting on Plasma Disruptions and their Mitigation, jointly organized by the Int [...]

    Read more

  • Start of assembly | World dignitaries celebrate a collaborative achievement

    Due to the constraints imposed by the COVID-19 pandemic, the crowd in the ITER Assembly Hall was small. But thanks to live broadcasting and video feed, the audi [...]

    Read more

Of Interest

See archived entries

T time for JET

Nick Holloway, Culham Center for Fusion Energy

The project management team from left to right: Ben O'Meara (Project Lead Engineer), Robyn Davies (Technical Clerk), Tim Jones (Project Sponsor), Alex Rowley (Requirements/Systems Engineer) and Robert Warren (Project Manager). (Click to view larger version...)
The project management team from left to right: Ben O'Meara (Project Lead Engineer), Robyn Davies (Technical Clerk), Tim Jones (Project Sponsor), Alex Rowley (Requirements/Systems Engineer) and Robert Warren (Project Manager).
Engineers at Culham Centre for Fusion Energy (CCFE) have begun to prepare Europe's flagship fusion experiment JET for a new set of full-power fusion experiments using tritium fuel.

The tests, currently scheduled for 2017-18, will be the first with tritium since 2003 and will act as an important "dress rehearsal" in preparation for ITER's operation with tritium.

To generate large amounts of power in commercial tokamak reactors, a combination of two heavy hydrogen nuclei—deuterium (D) and tritium (T)—will be required to fuel the fusion furnace. However, supplies of tritium are scarce and its radioactivity makes it impractical for use in most fusion research labs. For fusion power stations neither issue should be a problem; a lithium "blanket" around the tokamak will react with the fusion neutrons to produce tritium fuel within the device itself, and remote-controlled maintenance systems will ensure safe handling of material exposed to tritium and fusion neutrons. (JET has been at the forefront of the development and highly successful implementation of remote handling technology.)

Today though, to avoid the complications of tritium, the vast majority of fusion research is conducted with deuterium fuel only. This provides very accurate results that can be scaled up to predict the performance of future DT reactors. But for the best simulation of how ITER will operate with DT, there is nothing like the real thing—a series of fusion tests with both fuels.

That's where JET comes in. As the world's largest operating tokamak and the only such device capable of storing, using, recovering and recycling tritium, it has a unique role in fusion research. And upgrades since the 2003 tritium campaign—particularly the ITER-like inner wall of beryllium and tungsten—have effectively turned JET into a "mini-ITER"; as close as any present-day device can get to its operating conditions.

Another series of DT experiments on JET will therefore provide scientific information to help make ITER a success, as well as give physicists and engineers vital experience of running fusion machines with tritium.

Read the full story on the CCFE website. 


return to the latest published articles