Subscribe options

Select your newsletters:


Please enter your email address:

@

News & Media

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 [...]

    Read more

  • 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 [...]

    Read more

  • 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 [...]

    Read more

  • 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 [...]

    Read more

  • 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 [...]

    Read more

Of Interest

See archived entries

Shooting selected pellets into the plasma

Lynne Degitz, US ITER

The US ITER pellet injection team has designed and fabricated a new dual nozzle test article that will support both fuelling pellets and ELM pacing pellets in the ITER Tokamak. (Click to view larger version...)
The US ITER pellet injection team has designed and fabricated a new dual nozzle test article that will support both fuelling pellets and ELM pacing pellets in the ITER Tokamak.
ITER will require significant fuelling capability to operate at high density for long durations. Pellet injection provides efficient core and edge fuelling of deuterium or a deuterium/tritium mixture; the system will also deliver deuterium pellets to the plasma edge to mitigate edge localized mode instabilities (ELMs).

The US ITER pellet injection team based at Oak Ridge National Laboratory (ORNL) has designed and fabricated a new dual nozzle test article that will support both fuelling pellets and ELM pacing pellets in the ITER Tokamak.

The article was manufactured by Apollo Corporation in Wartburg, Tennessee. The component features shut-off nozzles which permit the selection of 5 mm fuelling pellets or 3 mm ELM pacing pellets; it is also possible to adjust the pellet length in order to tailor the amount of fuel or ELM pacing material delivered to the plasma.

A test stand at the ORNL Pellet Lab is being prepared and testing of the component will occur later this year. In the ITER machine, the pellets cut from the dual nozzle assembly will travel through the pellet selector to the pellet guide tubes, which direct fuelling and ELM pellets to specific areas of the plasma.


return to the latest published articles