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  • Central solenoid assembly | First sequences underway

    What does it take to assemble the magnet at the heart of ITER? Heavy lifting, unerring accuracy, and a human touch. The central solenoid will be assembled from [...]

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  • Assembly | The eyes of ITER

    Supervisors ensure compliance and completion as machine and plant assembly forges ahead. In Greek mythology, Argus was considered an ideal guardian because his [...]

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  • Component repairs | Removing, displacing and disassembling

    A good repair job starts with a cleared workbench, the right tools on hand and a strong vise. This axiom, true for odd jobs in a home workshop, is also true for [...]

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  • Assembly | Set of handling tools for in-vessel installation finalized

    Inside of a test facility that reproduces the volume and geometry of the ITER vacuum vessel environment, a team from CNIM Systèmes Industriels has dem [...]

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  • 360° image of the week | The assembly theatre

    Ever since it was invented almost two centuries ago, photography has tried to capture what the human eye actually sees. Despite huge progress achieved, it has n [...]

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Of Interest

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Image of the week

First weld for the top lid

Of the four sections that make up the ITER cryostat, the top lid is the thickest, second heaviest (more than 700 tonnes) and most structurally complex. On Monday 7 June, following a traditional coconut ceremony in the Cryostat Workshop that was broadcast live to India, two welders working on opposite sides of the component's skin, produced the "first arc" of a welding campaign that is scheduled to last four to five months.

On Monday 7 June, two welders from MAN Energy Solutions, working in parallel on opposite sides of the component's skin, produced the ''first arc'' of a welding campaign scheduled to last four to five months. (Click to view larger version...)
On Monday 7 June, two welders from MAN Energy Solutions, working in parallel on opposite sides of the component's skin, produced the ''first arc'' of a welding campaign scheduled to last four to five months.
The collective knowledge and experience that the ITER Organization, ITER India, Larsen & Toubro Ltd and MAN Energy Solutions have accumulated over the past four and a half years since welding operations began on the cryostat base will be a precious asset in the current operation.

"There are some very specific challenges to the welding of this massive component," explains Anil Bhardwaj, the leader of the Cryostat & Auxiliaries Group. "It has a rather thick skin, a large circular opening at its centre and a complex arrangement of ribs underneath. Distortions due to the welding process will be a constant preoccupation and will require constant monitoring."

As is traditional in India, a ''coconut ceremony'' placed the upcoming welding operation under the protection of Ganesha, the ''Remover of Obstacles.'' (Click to view larger version...)
As is traditional in India, a ''coconut ceremony'' placed the upcoming welding operation under the protection of Ganesha, the ''Remover of Obstacles.''
The cryostat top lid is made of twelve 30-degree sections that will require approximately 300 metres of deep welds (50 millimetres deep on average, but up to 280 millimetres at the flange levels) and more than 4 tonnes of filler metal.

After the cryostat base, lower cylinder and upper cylinder, the top lid will be the last section of the ITER cryostat assembled and welded in India's on-site Cryostat Workshop.



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