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Dynamic analysis of the forces on the COMPASS-U tokamak foundations during vertical displacement events
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SYSNO ASEP 0531301 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Dynamic analysis of the forces on the COMPASS-U tokamak foundations during vertical displacement events Author(s) Ortwein, R. (PL)
Blocki, J. (PL)
Hromádka, Jakub (UFP-V)
Šesták, David (UFP-V) RID
Havlíček, Josef (UFP-V) RID, ORCID
Patel, Nisarg (UFP-V)
Kovařík, Karel (UFP-V) RID, ORCID
Pánek, Radomír (UFP-V) RIDNumber of authors 8 Article number 020036 Source Title AIP Conference Proceedings, 2239. - Melville : AIP Publishing LLC, 2020 - ISBN 978-073541998-8 Number of pages 12 s. Publication form Online - E Action 4th Polish Congress of Mechanics Event date 08.09.2019 - 12.09.2019 VEvent location Krakow Country PL - Poland Event type WRD Language eng - English Country US - United States Keywords COMPASS Upgrade ; tokamak Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) Institutional support UFP-V - RVO:61389021 EID SCOPUS 85085750242 DOI 10.1063/5.0007822 Annotation The COMPASS Upgrade tokamak (B = 5 T, IP = 2 MA, R = 0.894 m, a = 0.27 m) requires strengthening of the existing foundations due to larger electro-magnetic (EM) loads occurring during plasma disruption events. The focus is given to the VDE as they create the largest EM forces. Due to the fast rate of change of these forces, dynamic effects were considered. In order to find the time evolution of the electromagnetic forces during the VDE disruptions, a 2D electromagnetic model has been created. Current values in the central solenoid, poloidal field coils and the vacuum vessel were obtained from the FIESTA code and the plasma was modeled with finite number of filaments with prescribed currents to model the vertical motion. The time evolutions of the electromagnetic forces during 500 ms were imported to a 3D mechanical model built in Ansys Workbench. The transient analysis was solved with the mode superposition method based on 100, 400 and 1000 modes. The extremum reaction forces acting on the foundations were found to be12.6 MN and +12.7 MN. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2021 Electronic address https://aip.scitation.org/doi/abs/10.1063/5.0007822
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