DocumentCode :
1764222
Title :
Specific Features of Wendelstein 7-X Structural Analyses
Author :
Bykov, Valerii ; Fellinger, J. ; Schauer, F. ; Koppen, Mario ; Egorov, K. ; van Eeten, P. ; Dudek, A. ; Andreeva, T.
Author_Institution :
EURATOM Assoc., Max Planck Inst. for Plasma Phys., Greifswald, Germany
Volume :
42
Issue :
3
fYear :
2014
fDate :
41699
Firstpage :
690
Lastpage :
697
Abstract :
The Wendelstein 7-X modular stellarator is in the final assembly phase at the Max Planck Institute for Plasma Physics in Greifswald, Germany. The design and assembly of the basic machine, that is, without in-vessel components, diagnostics and periphery, is completed. Structural parameters such as bolt preload, initial gap widths for contacts between structure elements, final magnet module positions, etc., were specified on the basis of detail numerical modeling and are now implemented. The focus of the numerical analysis has been shifted toward fast consideration of nonconformities and changes in assembly procedures, to preparation of commissioning, assessment of possible field disturbances, and exploration of operational limits. In parallel the analyses of in-vessel components, diagnostics, and periphery are being continued. This paper focuses on the specific features in the development, evolution, and realization of analysis strategies, implemented numerical approaches. Further specific subjects are standards and codes, safety margins in relation to expected tolerances and uncertainties, and the confirmation of analysis results by tests as well as their benchmarking with alternative models in different numerical codes. Finally, some lessons learned so far which might be relevant for other large fusion machines are highlighted, and a brief outlook on future work is given.
Keywords :
fusion reactor design; stellarators; Germany; Greifswald; Max Planck Institute for Plasma Physics; Wendelstein 7-X modular stellarator; Wendelstein 7-X structural analysis; basic machine assembly; basic machine design; bolt preload; final magnet module positions; fusion machines; in-vessel component analysis; in-vessel components; initial gap widths; operational limit exploration; possible field disturbance assessment; structure elements; Analytical models; Assembly; Benchmark testing; Coils; Iron; Numerical models; Plasmas; Analyses; Wendelstein 7-X (W7-X); construction; modeling; stellarator;
fLanguage :
English
Journal_Title :
Plasma Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-3813
Type :
jour
DOI :
10.1109/TPS.2014.2302857
Filename :
6739178
Link To Document :
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