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Fifty years after the first International Conference on Plasma-Surface Interactions in Magnetic Confinement Devices in 1974, the 26th edition of this much-laude [...]
Public-Private | Birth of a truly global fusion community
The global fusion landscape is undergoing a profound mutation. In the ambition of harnessing 'the energy of the Sun and stars,' public projects, government or u [...]
Industrial milestone | First cryopump passes all tests
The serial production of ITER's powerful torus and cryostat cryopumps is progressing at Research Instruments, Germany, on behalf of the European Domestic Agency [...]
Cryoline installation | Ball joints against earthquakes
In order to reach clients inside the Tokamak Building, cooling fluids produced by the ITER cryoplant flow through many kilometres of highly sophisticated p [...]
The changing fusion landscape | ITER hosting private sector workshop
Take out your smart phone and search your favourite news site for 'nuclear fusion' or 'fusion energy.' On any given day, you will find articles discussing break [...]
Cryostat | Home stretch for base and lower cylinder
Just over two years after the first welding activities were initiated in the Cryostat Workshop at ITER, Indian Domestic Agency contractors are executing the final assembly tasks on the two lower sections of the cryostat—the base and the lower cylinder. Site acceptance tests are planned in March/April.
The components of the cryostat base—the 20-metre-in-diameter bottom disk, side shells, and 30-metre-in-diameter pedestal ring—are positioned for final assembly in the Cryostat Workshop. After welding, tests and final machining, site acceptance tests will be carried out in April 2019.
On large steel frames at either end of the Cryostat Workshop ITER's largest component—and the world's largest stainless steel high-vacuum pressure chamber—is taking shape. The 29 x 29 metre cryostat has two important functions in the ITER machine: it provides a vacuum environment to critical "cold" components (the magnets operating at 4.5 K and thermal shield operating at 80 K); and it has a structural role in supporting the mass of the Tokamak and transferring horizontal and rotational forces to the radial walls.
The assembly of the cryostat has been underway since September 2016, when teams of welding specialists began assembling the pie-slice-shaped segments of tier one of the base. Work began in 2017 on the lower cylinder and today, the fabrication of both lower sections has advanced to the final activity stage under Indian contractor Larsen & Toubro (manufacturing design, fabrication and assembly) and sub-contractor MAN Energy Solutions (welding).
The last seam welds are underway now on the lower cylinder, while the three parts of the base—lower sandwich, upper pedestal, and vertical shells—have been aligned for final welding and assembly.
