量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum Science and Technology.
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In order to realize the DC 1 MV power supply system for ITER neutral beam injector (NBI) and NB test facility (NBTF), insulation technologies in oil, gas, vacuum and with water have been developed. To supply cooling water and high-temperature water, mechanical and electrical properties of fiber reinforce plastic (FRP) with water absorption was clarified. The mock-up of FRP tube was fabricated and pressure tightness and voltage capability was confirmed. As for high-temperature water supply to the plasma grid, the water resistivity up to 180 oC was experimentally measured and the high-temperature water channel was successfully designed. Based on those developments, manufacturing and installation for the power supply components for the NBTF/MITICA has been progressed and completed. Finally, to verify the voltage holding capability of the DC 1 MV power supply component, high-voltage test has been started by filling SF6 gas inside the components. That was the first high-voltage test in the NBTF/MITICA power supply under the assembled configuration with all components procured by Japan. As an initial test, high-voltage of DC 1.2 MV was applied on the DC generators and DC filter. As a result, stable voltage holding without breakdown for 1 hour was successfully confirmed.
雑誌名
Proceedings of 27th IAEA Fusion Energy Conference (FEC2018)
COMPLETION OF DC 1 MV POWER SUPPLY SYSTEM FOR ITER NEUTRAL BEAM TEST FACILITY
