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  • Building ITER | Halfway to First Plasma

    It's been a long road and we haven't reached our destination yet. But on its way to operation, ITER has just passed a significant milestone: according to the st [...]

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  • Director-General | Visits and an award in Washington

    Keeping the governments and policy makers of the ITER Members informed on the project's progress and challenges is an essential part of the Director-General's m [...]

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  • On-site coil winding | Big, round and red

    It's big, round and red and represents the latest addition to the collection of cranes operating on the ITER construction site. On Friday 8 November, two power [...]

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  • Milestones | Japan completes central solenoid conductor

    The Japanese Domestic Agency has successfully completed the procurement of 43 kilometres (700 tonnes) of niobium-tin cable-in-conduit superconductor for ITER's [...]

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  • Neutral beam test facility | Powerful ion source delivered

    OnSPIDER, one of twotestbeds at the ITER Neutral Beam Test Facility, the negative ion source for ITER's heating neutral beam system will be demonstrated at full [...]

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Of Interest

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Korea completes niobium-tin strand production

Soo-Hyeon Park, ITER Korea

Arnaud Devred and Alexander Vostner from ITER (third and fifth from left) visited Kiswire Advanced Technology (KAT) just before the issue of ATPPs for the final batch of strand billets on 21 November. With them, from left to right, are Soun Pil Kwon and Soo-Hyeon Park from ITER Korea and Pyeong Yeol Park, Kihong Sim and Kyeong Ho Jang from KAT. (Click to view larger version...)
Arnaud Devred and Alexander Vostner from ITER (third and fifth from left) visited Kiswire Advanced Technology (KAT) just before the issue of ATPPs for the final batch of strand billets on 21 November. With them, from left to right, are Soun Pil Kwon and Soo-Hyeon Park from ITER Korea and Pyeong Yeol Park, Kihong Sim and Kyeong Ho Jang from KAT.
At the end of November, Korea became the first Domestic Agency to complete the production of niobium-tin (Nb3Sn) strand for ITER's toroidal field conductors.

Nb3Sn strand is the basic building block of ITER's large magnets, the key element that makes them superconducting. Superconductivity is essential to pursuing fusion energy generation because superconductors consume less power and are cheaper to operate than conventional counterparts, while carrying higher current and producing stronger magnetic field. Six Domestic Agencies (China, Europe, Japan, Korea, Russia and the US) are responsible for procuring over 400 tons of toroidal field conductor for ITER.

The Korean milestone was validated late November with the approval the Authorization To Proceed Points (ATPPs) by the ITER Organization for the final batch of strand billets. (A billet is the smallest traceable production unit of strand.) In order to assure quality and full traceability for ITER, the manufacturing information and test results of every billet are registered electronically in the Conductor Database, and then reviewed by the procuring Domestic Agency and finally given approval by the ITER Organization to proceed to next step. Remarkably, fully 2,038 individual Korean billets have passed thorough review by the Korean Domestic Agency and ITER.

The Korean share of toroidal field strand procurement amounts to 93 tonnes (20 percent of toroidal field strands). The manufacturing contract was awarded to Kiswire Advanced Technology (KAT), which began producing in 2009. To have completed the manufacturing in four years is an impressive rate of production considering that, worldwide, the production of Nb3Sn strand before ITER did not exceed 15 tonnes per year.

"The toroidal field conductor Procurement Arrangement with Korea is a good example of an ITER success story," states Arnaud Devred, who is responsible for the Superconductor Systems & Auxiliaries at ITER. "The close collaboration of the Korean Domestic Agency and the ITER Organization to monitor execution enabled both parties to address production issues in a timely and effective manner. This milestone is all the more remarkable in that the strand supplier KAT was new to the business when the contract was launched, but managed to adapt to the world-class standards imposed by the Procurement Arrangement."



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