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Sub-assembly tools | A 12-tonne beam, a crane and a little push

ITER - di, 15/01/2019 - 10:24


There is nothing remarkable about lifting a 12-tonne beam. Except when it happens in the spectacular setting of the ITER Assembly Hall, and the beam needs to be fitted with extreme precision into a structure as monumental as the ITER sector sub-assembly tools.
Towering 22 metres above ground, the vacuum vessel sector sub-assembly tools (SSATs) are formidable handling machines that will be used to pre-assemble vacuum vessel sectors with a pair of toroidal field coils and thermal shield segments before integration in the machine.
The assembly of SSAT-1 began in November 2017 and is now complete. Work on its identical twin SSAT-2 started in September the following year and is now entering its final phase.
Part of Korea's contribution to ITER, the tools are assembled by French contractor CNIM. Lessons learned from SSAT-1 have reduced assembly time for SSAT-2 by approximately one-third.
On Wednesday 9 January, installation operations began for some of the last elements: two 12-tonne beams that stabilize the massive pillars of the machine.
Click here to watch a video of the installation.

Successful outcome for ECH Upper Launcher Blanket Shield Module Procedures Qualification

F4E News - ma, 14/01/2019 - 01:00
The qualification related to the fabrication of the Electron Cyclotron Upper Launcher Blanket Shield Module is now successfully concluded.

Successful outcome for Blanket Shield Module Procedures Qualification

F4E News - ma, 14/01/2019 - 01:00
The qualification related to the fabrication of the Electron Cyclotron Upper Launcher Blanket Shield Module is now successfully concluded.

Pre-Compression Rings facility ready. Let the tests begin!

F4E News - wo, 09/01/2019 - 01:00
ITER Organization, F4E and CNIM unveil tooling that will put components under pressure.

Pre-Compression Rings facility ready. Let the tests begin!

F4E News - wo, 09/01/2019 - 01:00
ITER Organization, F4E and CNIM unveil tooling that will put components under pressure.

Toroidal field coils | First ITER magnet arrives this year

ITER - ma, 07/01/2019 - 16:59


A major milepost is projected for 2019 as the first of ITER's powerful, high-field magnets is scheduled to arrive from Japan. Let's take a look behind the scenes at the last-stage fabrication activities that are mobilizing the expertise and skill of heavy industry specialists under the responsibility of Japanese QST, the National Institutes for Quantum and Radiological Science and Technology.
Eleven years after completing the signatures on documents specifying technical and quality control requirements for the supply of nine toroidal field coils, the Japanese Domestic Agency is overseeing the last, spectacular sequences on its first production unit.
The toroidal field coils are the ITER magnets responsible for confining the plasma inside the vacuum vessel using high-performance, internally cooled superconductors called CICC (cable-in-conduit) conductors. Following the completion of the single largest superconductor procurement in industrial history, fabrication of the final coils is proceeding in Japan (9 toroidal field coils plus 10 coil structures to be sent to Europe) and Europe (10 toroidal field coils). Each coil is made up of a superconducting winding pack and surrounding stainless steel coil case.
The list of applicable superlatives is long—the toroidal field coils are the largest and most powerful superconductive magnets ever designed, with a stored magnetic energy of 41 GJ and a nominal peak field of 11.8 T. Together they weigh in at over 6,000 tonnes including superstructure, representing 60 percent of the magnetic array on the machine and over one-fourth of the Tokamak's total weight. They require 4.57 km of conductor per coil wound into 134 turns in the central core, or winding pack, of the magnet. And they have required the longest procurement lead-time of any ITER component, with six out of seven ITER Members involved in the production of 500 tonnes of niobium-tin superconducting strand (100,000 km) required for the toroidal field superconducting cables. The first winding pack to come off the assembly line in Japan is currently undergoing final inspection by the industrial consortium of Mitsubishi Heavy Industries/Mitsubishi Electric Corporation. The final sequence of testing involved high voltage tests, helium leak tests, and finally cryogenic tests, during which the winding pack is inserted into a cryostat (see top photo) and cooled to 80 K (-193 ˚ C) to confirm leak tightness. With the successful end of cold testing, the winding pack is now undergoing post-cold-test helium leak tests and high voltage tests and will soon be ready for assembly with its toroidal field coil case. Five other winding packs are in various stages of production.

The 200-tonne case assemblies are also in series production. After successful fitting tests early last year, two have been delivered to Europe for insertion activities and a third will arrive this month; another completed production unit will remain at MItsubishi for the assembly of the Japanese coil that is due at ITER in 2019. The fitting tests are the most delicate stage in the coil case manufacturing process, demonstrating that sub-assemblies manufactured and welded at different factory sites can be successfully paired with gap tolerances as strict as 0.25 to 0.75 mm along 15-metre weld grooves.

Please see the gallery below for a full update on manufacturing progress.

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