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

  • Cryostat thermal shield | A "strong back" for a fragile component

    The lower cylinder thermal shield is a large silver-plated component, circular in shape and five metres tall, which fits inside the depression in the cryostat b [...]

    Read more

  • Diagnostic shielding | B4C ceramic bricks prove their worth

    A number of materials can effectively shield diagnostic equipment from the neutron flux coming from the plasma. To find the best one, the diagnostics team at IT [...]

    Read more

  • Image of the week | The cryostat top lid, batch after batch

    Batch after batch, the elements for the top lid of the ITER cryostat keep arriving from India. As of today, 7 out of the 12 required segments have been delivere [...]

    Read more

  • 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

Of Interest

See archived entries

Bringing the voltage down

The workshop, hosted by ITER's Electrical Engineering Division's Coil Power Supply Section, reunited more than 40 participants. (Click to view larger version...)
The workshop, hosted by ITER's Electrical Engineering Division's Coil Power Supply Section, reunited more than 40 participants.
High-voltage current from the French grid will be delivered to ITER's door by the tall pylons that descend, arms outstretched, from the hills of the CEA Cadarache research facility.

ITER's coil power supply system will convert the 400 kV grid voltage from these lines into controlled direct current in ITER's 22 magnet coils. The high voltage must be transformed down to a much lower voltage so it can be rectified and delivered at very high current through a huge busbar system to the magnet feeders.

A joint workshop was held at ITER from 27-28 February to discuss the instrumentation and control (I&C) for the coil power supply system; it was the first multilateral face-to-face meeting on this topic with all procurement stakeholders present: the Domestic Agencies from China, Korea and Russia and their suppliers, and ITER experts from the CODAC and Electrical Engineering Divisions—more than 40 participants in all.

The I&C system's role will be to configure the plant and allow it to be driven by the plasma control system to produce and maintain a plasma discharge. The system will also monitor and protect the plant and interconnect to the central interlock system, as well as protect personnel and the toroidal field coils from safety hazards by interconnection with the central safety system. The coil power supply system has many other interfaces, for example the pulsed power electrical network and cooling water systems.

Coordinator Jeremy Goff with Wu Yao from the Chinese supplier of the reactive power compensation system, Rongxin Power Electronic Co Ltd (RXPE). (Click to view larger version...)
Coordinator Jeremy Goff with Wu Yao from the Chinese supplier of the reactive power compensation system, Rongxin Power Electronic Co Ltd (RXPE).
The coordinator of this week's workshop, Jeremy Goff, likens the coil power supply system to the heart of ITER, pumping "lifeblood" through the ITER coils. "If the current does not flow there can be no plasma. The coil power supply system will be a huge installation and it must be very reliable. Some plant components will run continuously for weeks at a time ..."

Although the procurement for the system is shared, providing the coordinating "top layer" of the I&C system—the master control system—is the responsibility of Korean Domestic Agency.

The workshop met most of its aims: it brought together all those involved around one table, design proposals were shared, and further work identified to bring all the systems together into one. The participation of CODAC experts was highly beneficial and the next steps towards a common final design can now be taken.


return to the latest published articles