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Dynamic analysis of the COMPASS-U tokamak for the design of foundation
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SYSNO ASEP 0560197 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Dynamic analysis of the COMPASS-U tokamak for the design of foundation Author(s) Ortwein, R. (PL)
Hromádka, Jakub (UFP-V)
Kovařík, Karel (UFP-V) RID, ORCID
Havlíček, Josef (UFP-V) RID, ORCID
Šesták, David (UFP-V) RID
Yanovskiy, Vadim (UFP-V) ORCID
Pánek, Radomír (UFP-V) RIDNumber of authors 7 Article number 113221 Source Title Fusion Engineering and Design. - : Elsevier - ISSN 0920-3796
Roč. 182, September (2022)Number of pages 12 s. Language eng - English Country CH - Switzerland Keywords COMPASS-U ; tokamak ; dynamic analysis Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects EF16_019/0000768 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UFP-V - RVO:61389021 UT WOS 000831064500003 EID SCOPUS 85133470698 DOI 10.1016/j.fusengdes.2022.113221 Annotation The COMPASS-U tokamak is currently at the final design stage. In order to design safe and reliable foundation slab for the machine, a dynamic analysis of the deformations and stresses during the most severe plasma disruptions was necessary. A global FEM model has been built including simplified geometry of the entire tokamak as well as the foundation slab and its supporting concrete pillars and the surrounding soil. Vertical forces from the worst-case axisymmetric plasma disruption scenarios were applied to the vacuum vessel and the coil system (CS, PF, TF), causing vibration of the entire tokamak. The deformations and stresses transmitted to the anchors in the reinforced concrete slab were computed. Based on the presented model, the initial thickness of the concrete slab of 1 m was decreased by 20% to 0.8 m for the final design. Maximum tensile stress of 1.71 MPa was found in the brittle concrete, indicating that no cracking will occur during the worst-case axisymmetric disruptions. Motion of the vacuum vessel due to vertical forces was analyzed, showing maximum deformations below 1.13 mm over the course of the worst disruption. Velocities below 0.29 m/s and accelerations below 287 m/s2. The computational cost was analyzed in details, providing estimates for the computational time, RAM requirements of 25.8 GB/MDOF (77.4 GB/Mnode) and hard disc requirements for the results file of 0.5 GB/MDOF (1.5 GB/Mnode) for each transient time step. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2023 Electronic address https://www.sciencedirect.com/science/article/pii/S0920379622002174?via%3Dihub
Number of the records: 1