Subscribe options

Select your newsletters:

Please enter your email address:

@

News & Media

Latest ITER Newsline

  • FEC2020 | Seeking sponsors for 28th IAEA Fusion Energy Conference

    For only the third time since 1961, the International Atomic Energy Agency's Fusion Energy Conference will be taking place in France—hosted jointly by the Frenc [...]

    Read more

  • Nuclear safety | Under constant scrutiny

    Because one of the elements involved in the fusion reaction is the radioactive isotope tritium, and because the hydrogen fusion reaction itself generates a high [...]

    Read more

  • Power conversion | Alien structures and strange contraptions

    There are places in ITER that seem to belong to another world, places full of alien structures and strange contraptions. The feeling—a mixture of awe and puzzle [...]

    Read more

  • Tokamak Complex | A changing landscape

    For the past three years, the view from the top of the highest worksite crane has not changed much. Inside of the Tokamak Complex, 80 metres below, concrete gal [...]

    Read more

  • Ion cyclotron heating | How to pump 20 MW of power into 1 gram of plasma

    To power the ion cyclotron system, the ITER Organization and its partners are designing not only new antennas, which will be housed in the tokamak vessel, but a [...]

    Read more

Of Interest

See archived entries

Pressing the switch for the last seismic pad

Robert Arnoux

ITER Director-General Motojima and Laurent Schmieder, of the European Domestic Agency, press the switch that finalizes the installation of the 493rd and final seismic pad in the Tokamak Pit. (Click to view larger version...)
ITER Director-General Motojima and Laurent Schmieder, of the European Domestic Agency, press the switch that finalizes the installation of the 493rd and final seismic pad in the Tokamak Pit.
The last step in installing a seismic pad consists of pouring highly fluid mortar into the small space that persists between top of the concrete plinth and the bottom of the pad's metal plate after the pouring of second-phase concrete.

An ingenious technique was developed specifically for ITER to avoid the formation of bubbles in the mortar: a thin polyethylene film sealing the bottom of the mortar chute is instantly vaporized by the passage of a strong electric current, thus producing a gush of mortar.

On Wednesday, 18 April, the switch that sent the current into the film was jointly pressed by ITER Director-General Osamu Motojima and Laurent Schmieder, head of the Site, Buildings and Power Supplies Division for the European Domestic Agency F4E.

The 493rd—and final—seismic pad has now been finalized, on time and within budget. The event marked an important milestone for ITER, F4E and NUVIA, the company in charge of installing the seismic pads on the basemat of the Seismic Pit.

Pad #493 stands precisely at the centre of the star-like formation of plinths that will directly bear the weight of the Tokamak. (Click to view larger version...)
Pad #493 stands precisely at the centre of the star-like formation of plinths that will directly bear the weight of the Tokamak.
Although all the ITER seismic pads are identical, number 493 has special symbolic value: it stands precisely at the centre of the star-like formation of plinths that will directly bear the weight of the Tokamak.

And to celebrate the event, instead of opening lunch boxes or taking a quick trip to the worksite canteen, workers and guests were treated to a traditional méchoui (from the Arabic meaning "roasted") in the large tent standing on the site of the future Hot Cell Facility.

In typical south-Mediterranean fashion, mussels and octopus soup were served first, as two whole sheep finished roasting on a bed of embers outside the tent.


return to the latest published articles