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Image of the week | The platform's quasi-final appearance
Since preparation work began in 2007 on the stretch of land that was to host the 42-hectare ITER platform, regular photographic surveys have been organized to d [...]
Before being delivered to ITER, the torus and cryostat cryopumps are submitted to a comprehensive series of factory acceptance tests. This is not sufficie [...]
Historically, inertial confinement and magnetic confinement approaches to fusion have been parallel, separate processes. The ITER Private Sector Fusion Workshop [...]
Toroidal field coil celebration | "A good day for the world"
A little before 2:00 a.m. on 17 April 2020 a powerful transport trailer, accompanied by dozens of technical and security vehicles, passed the gates of the I [...]
Press conference | New baseline to prioritize robust start to exploitation
At a press conference on 3 July attended by approximately 200 journalists and key ITER stakeholders, ITER Director-General Pietro Barabaschi answered questions [...]
It took 55 trucks to deliver the parts for the giant crawler crane and ten days to assemble them.
The red monster, with crawlers as big as a school bus and a mast reaching high above the roof of the Assembly Hall, was invested with a delicate mission: lifting and installing the elements of the double overhead bridge crane that will handle the massive ITER components during pre-assembly activities.
Positioned above the Assembly Hall, the crane's boom holds a man-sized hook that passes through the roof. The crane, delivered from Saudi Arabia for this lifting task, is operated by personnel from the Dutch company Mammoet.
In order to lift the four girders and their corresponding trolleys into position 43 metres above the Assembly Hall basemat, the crawler crane was positioned outside the building. Its boom, high above the building, held a man-sized hook that passed through an opening in the roof and reached down to the waiting components.
Below, workers were busy adjusting cables, slings, braces and shackles in order to perfectly balance the first load to be lifted—one of the four girders, now fully equipped with 30 tonnes of gear motors, wheels, braces, and electrical equipment and weighing 186 tonnes.
Despite the spectacular setting and the size of the components, the professionals appeared unfazed. "It's a standard operation," says Roberto Lanza of the ITER Building & Civil Works Section. "We'll first lift then slightly tilt each girder in order to align it with the rails above."
The operation is a mix of brute force, high technology and worker know-how. Connected by radio to the lifting supervisor, the crane operator sitting in his cabin outside the building slowly lifts the load. Surveyors direct their laser beams to ensure that everything is proceeding nominally, and men on the ground and up in the rafters use ropes to adjust the component's position.
As with all things ITER, tolerances are stringent. "The final adjustment must be ... and will be ... perfect," says Roberto.
Two of the four girders are now in place as well as one of the four 100-tonne trolleys. Lift operations will continue and by the end of this week the Assembly Hall will be fitted out with one of the most spectacular tools required for the assembly of the machine.
Click here to view a video of the lift operations.
