Tensile tests of ITER TF conductors jacket materials

Anashkin, O.P.; Кейлин, В.Е.; Krivykh, A. V.; Диев, Д. Н.; Dinisilov, A. S.; Щербаков, В. И.; Tronza, V.

doi:10.1063/1.4712087

Cited by 6 publications

(2 citation statements)

References 4 publications

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“…The data of figure 41 show a reasonable agreement between KIT and DA measurements. The ITER-IO also funded a contract with the Kurchatov Institute in Moscow, Russia, to compare the results of mechanical tests on sub-size samples and full-size jackets, but more work would be needed to assess the reliability of the measurements on full-size jackets [120].…”

Section: Production Statusmentioning

confidence: 99%

Challenges and status of ITER conductor production

Devred

Backbier

Bessette

et al. 2014

Supercond. Sci. Technol.

170

118

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Taking the relay of the Large Hadron Collider (LHC) at CERN, ITER has become the largest project in applied superconductivity. In addition to its technical complexity, ITER is also a management challenge as it relies on an unprecedented collaboration of 7 partners, representing more than half of the world population, who provide 90% of the components as in-kind contributions. The ITER magnet system has a stored energy of 51 GJ and involves 6 of the ITER partners. The coils are wound from Cable-In-Conduit Conductors (CICCs) made up of superconducting and copper strands assembled into a fully transposed, rope-type cable, inserted into a conduit of butt-welded austenitic steel tubes. The conductors for the Toroidal Field (TF) and Central Solenoid (CS) coils require about 500 tons of Nb 3 Sn strands while the Poloidal Field (PF) and Correction Coil (CC) and busbar conductors need around 250 tons of Nb-Ti strands. The required amount of Nb 3 Sn strands far exceeds pre-existing industrial capacity and has called for a significant worldwide production scale up. The TF conductors are the first ITER components to be mass produced and are more than 50% complete. During its life time, the CS coil will have to sustain several tens of thousands of electromagnetic (EM) cycles to high current and field conditions, way beyond anything a large Nb 3 Sn coil has ever experienced. Following a comprehensive R&D program, a technical solution has been found for the CS conductor, which ensures stable performance versus EM and thermal cycling. Productions of PF, CC and busbar conductors are also underway. After an introduction to the ITER project and magnet system, we describe the ITER conductor procurements and the Quality Assurance/Quality Control programs that have been implemented to ensure production uniformity across numerous suppliers. Then, we provide examples of technical challenges that have been encountered and we present a status of ITER conductor production worldwide.

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Section: Production Statusmentioning

confidence: 99%

Challenges and status of ITER conductor production

Devred

Backbier

Bessette

et al. 2014

Supercond. Sci. Technol.

170

118

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“…The system of equations (16)(17)(18)(19)(20)(21) can be used to investigate the stress and strain of a single wire when the cable is subjected to a combination of tensile and twisting load.…”

Section: Numerical Model For Bi2212 Cable Under Loadingmentioning

confidence: 99%

Stress–Strain Distribution Analysis in Bi2212 Subcable Based on Numerical Modeling and Experiment

Qin

Dai

Wang

et al. 2016

IEEE Trans. Appl. Supercond.

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There has been sustained interest in the development of Bi2212/Ag round wire (RW) because of its unique potential for applications in high-field magnets (25 T or higher). The Bi2212 conductor is a round strand, which is a very favorable shape to produce multi-stage twisted cable-in-conduit conductors (CICCs) for the next fusion machine (DEMO). One drawback of Bi2212 is its fragile mechanical properties. The stress and strain accumulated during cabling, thermal contraction during cooldown and electromagnetic load can have a severe impact on the transport properties of Bi2212 RW. In order to investigate the strain distribution of Bi2212 in CICC, some R&D work was made at the Institute of Plasma Physics, Chinese Academy of Science (ASIPP). A simple cable wound with three Bi2212 round wires was manufactured and subjected to mechanical tests. A numerical model was proposed to analyze the stress-strain distribution of a wire inside a cable at cryogenic temperature. Comparisons were made between model and experimental results. Based on the results and improved understanding of the mechanical behavior, an optimization could be implemented to reduce the Bi2212 cable degradation, in terms of conductor design, manufacture and operation.Index Terms-Bi2212 cable, numerical model, experiment, strain.

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