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The ITER EC H&CD upper launcher: Seismic analysis

Aiello, G. 1; Vaccaro, A. 1; Combescure, D.; Gessner, R. 1; Grossetti, G. 1; Meier, A. 1; Saibene, G.; Scherer, T. 1; Schreck, S. 1; Spaeh, P. 1; Strauss, D. 1
1 Karlsruher Institut für Technologie (KIT)

Abstract:
The electron cyclotron heating and current drive (EC H&CD) upper launcher (UL) is a component of the ITER tokamak machine devoted to inject localized high microwave power, in order to counteract plasma instabilities (MHD activity). The UL consists of an assembly of ex-vessel waveguides (with diamond windows and isolation valves) and an in-vessel port plug (PP). The PP, with length close to 6 m, is fixed by a support flange into the upper port of the vacuum vessel (VV) as a cantilevered structure and the nominal gap between PP and port is 25 mm only. During an earthquake, accelerations generated by seismic events cause oscillations of the PP which might be amplified in case of resonance with the natural frequencies. A seismic analysis is therefore required in order to check the response of the UL PP to earthquakes.
This paper shows the procedure used for the seismic analysis of the UL PP and results are given in terms of displacements and stresses. The ITER reference earthquake named SL-2 seismic event was considered. The response spectrum method was used in the analysis and floor response spectra (plots of acceleration versus frequency) provided by ITER/F4E at the upper level of the tokamak were applied to the supports as load. ... mehr


Postprint §
DOI: 10.5445/IR/110097103
Veröffentlicht am 07.02.2022
Originalveröffentlichung
DOI: 10.1016/j.fusengdes.2014.03.036
Scopus
Zitationen: 10
Web of Science
Zitationen: 9
Dimensions
Zitationen: 9
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2014
Sprache Englisch
Identifikator ISSN: 0920-3796, 1873-7196
KITopen-ID: 110097103
HGF-Programm 31.30.04 (POF II, LK 01) ECRH Heiz.u.Strombetr. Port Plug-Entw.
Erschienen in Fusion engineering and design
Verlag Elsevier
Band 89
Seiten 1809-1813
Schlagwörter ITER; Upper Launcher; seismic analysis; response spectrum; Newmark's rule
Nachgewiesen in Dimensions
Scopus
Web of Science
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