Installation, Commissioning and Tests of Four Fast Switching Units of up to 20 kA for the JT-60SA Nuclear Fusion Experiment
Alessandro Lampasi,
Filippo Burini,
Giuseppe Taddia,
Sandro Tenconi,
Makoto Matsukawa,
Katsuhiro Shimada,
Luca Novello,
Antti Jokinen and
Pietro Zito
Additional contact information
Alessandro Lampasi: Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Via Enrico Fermi, 45, 00044 Frascati, Italy
Filippo Burini: OCEM Power Electronics, Via della Solidarietà, 2/1/Località Crespellano, Valsamoggia, 40056 Bologna, Italy
Giuseppe Taddia: OCEM Power Electronics, Via della Solidarietà, 2/1/Località Crespellano, Valsamoggia, 40056 Bologna, Italy
Sandro Tenconi: OCEM Power Electronics, Via della Solidarietà, 2/1/Località Crespellano, Valsamoggia, 40056 Bologna, Italy
Makoto Matsukawa: National Institutes for Quantum and Radiological Science and Technology (QST), Mukoyama 801-1, Naka-shi 311-0193, Ibaraki-ken, Japan
Katsuhiro Shimada: National Institutes for Quantum and Radiological Science and Technology (QST), Mukoyama 801-1, Naka-shi 311-0193, Ibaraki-ken, Japan
Luca Novello: Fusion for Energy (F4E), Boltzmannstrasse 2, 85748 Garching, Germany
Antti Jokinen: Fusion for Energy (F4E), Boltzmannstrasse 2, 85748 Garching, Germany
Pietro Zito: Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Via Enrico Fermi, 45, 00044 Frascati, Italy
Energies, 2018, vol. 11, issue 4, 1-21
Abstract:
The nuclear fusion project JT-60SA is presently under construction in Naka (Japan) as a joint collaboration between Europe and Japan, within the framework of the Broader Approach Agreement. According to such agreement, the various JT-60SA systems are supplied by European and Japanese institutions. In particular, the Italian Agency ENEA was in charge for the procurement of the four Switching Network Units (SNUs) for the JT-60SA Central Solenoid (CS). The main SNU function is to interrupt a DC current up to 20 kA in a short time (less than 1 ms) in order to produce an overvoltage of up to 5 kV, crucial to generate and sustain the fusion plasma. The SNU design, manufacturing and factory test activities have been completed in 2016. After the delivery in Naka, the four SNUs have been installed and successfully commissioned in 2017. After an overview on the main technical characteristics of the SNUs and the key aspects of their design, this paper describes the activities performed on-site, highlighting the results obtained during the final acceptance tests and comparing them with the design simulation and the factory test results.
Keywords: nuclear fusion; tokamak; plasma breakdown; superconductor; switching network unit; DC current interruption; hybrid electromechanical-electronic switch; high current power supply; high current test (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
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