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Japanese company produces first strands for ITER TF conductors

-Arnaud Devred, ITER Magnets Division

Hitachi Cables Quality Assurance officers measuring the strand diameter after delivery from Jastec. (Click to view larger version...)
Hitachi Cables Quality Assurance officers measuring the strand diameter after delivery from Jastec.
The first small step: the box contains two spools of Nb3Sn strand representing a value of around $30 000. The JA-DA Responsible Technical Officer Y. Takahashi stands in front. (Click to view larger version...)
The first small step: the box contains two spools of Nb3Sn strand representing a value of around $30 000. The JA-DA Responsible Technical Officer Y. Takahashi stands in front.
ITER Organization presents the JA-DA and Hitachi with an award for their performance (two bottles of champagne to represent the ITER site and a bottle of Sake to represent the source of the material). (Click to view larger version...)
ITER Organization presents the JA-DA and Hitachi with an award for their performance (two bottles of champagne to represent the ITER site and a bottle of Sake to represent the source of the material).
The first 50kg of chrome-plated niobium-tin (Nb3Sn) strands for the ITER Toroidal Field (TF) magnet conductor have been delivered for cabling. In total, the ITER TF coils will require about 400 tons of Nb3Sn strands, whose production will be shared among six ITER Members: China, Europe, Japan, Korea, Russia and the US. This delivery represents a very small first step (0.01% of the supply) on the road to construction, but it is the first completed component that will form a part of the future tokamak.

On 28 November 2007, the Japanese Domestic Agency (JA-DA) was the first to sign a Procurement Arrangement (PA) with the ITER Organization covering its 25% share of Cable-In-Conduit Conductors for the TF magnet system. In March 2008, JA-DA awarded two contracts to Japanese companies for the supply of 20 tons each of chromium-plated Nb3Sn strands within the framework of this PA. One of the companies, Jastec, completed the production of its first batch of strands in mid-December 2008 and carried out the PA-required acceptance tests earlier this year.

Following the successful completion of these tests, Jastec received the required 'authorization to proceed' from the JA-DA, and was cleared to ship the strands to the cable manufacturer. All corresponding strand data was saved to the Conductor Database, developed by the ITER Organization as a common tool to assist the Domestic Agencies in monitoring their industrial contracts.


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