Subscribe options

Select your newsletters:


Please enter your email address:

@

News & Media

Latest ITER Newsline

  • Worksite | First pillars for the crane hall

    For the overhead cranes to deliver machine components into the Tokamak assembly pit, the rails that carry them need to be extended some 80 metres beyond the tem [...]

    Read more

  • Transport | 300 tonnes of equipment on its way to ITER

    A specially designed assembly tool and elements of the cryostat and vacuum vessel thermal shields are part of the shipments travelling now from Korea to ITER. W [...]

    Read more

  • Fusion world | A new tokamak in town

    After EAST in China and WEST in France, another of the cardinal points of the compass has been chosen to name a tokamak. Introducing NORTH—the NORdic Tokamak de [...]

    Read more

  • Opportunities | Bringing the ITER Business Forum to Washington

    Every second year, a two-day ITER Business Forum is held to invite existing and potential suppliers for the ITER Project—laboratories, universities, and compani [...]

    Read more

  • World Energy Congress | Fusion "at a time of transition"

    In the United Arab Emirates, Abu Dhabi is often referred to as a tourism hotspot that combines luxury and ancient traditions. In September, Abu Dhabi was in the [...]

    Read more

Of Interest

See archived entries

Image of the week

Don't get mixed up!

In case of a sudden loss of superconductivity in the ITER magnets (a "quench") the helium that circulates in the coils will be almost instantly discharged into dedicated double-wall quench tanks.

This complex set of hand valves and local readings of pressure, temperature and flow is part of the cooling loop that maintains the temperature inside the quench tanks at 100 K. It will provide field operators with a convenient tool for maintenance operations. (Click to view larger version...)
This complex set of hand valves and local readings of pressure, temperature and flow is part of the cooling loop that maintains the temperature inside the quench tanks at 100 K. It will provide field operators with a convenient tool for maintenance operations.
If the tanks were at ambient temperature, the thermal shock caused by cryogenic helium discharged from the magnets at just above 4 K (minus 269 °C) would result in considerable stress and shrinkage to the tank structures.

In order to prevent such a potentially damaging event, the inner vessels of the tanks must be cooled to cryogenic temperature whenever the machine is in operation. This is achieved through a cooling loop that maintains the temperature inside the tanks at 100 K (minus 173 °C)—a temperature at which shrinking has already occurred.

This valve and instrumentation panel outside of the cryoplant is part of that loop. Although measurement signals and activators from all cryogenic systems interface with the CODAC human-machine interface in the local cryo-control room, the outdoor instrumentation panel with its dozens of hand valves and local readings of pressure, temperature and flow provides field operators with a convenient tool for maintenance operations.

 


return to the latest published articles