Application of best-fit survey techniques throughout design, manufacturing and installation of the MKII divertor at JET
- JET Joint Undertaking, Abingdon (United Kingdom)
- GEC Alsthom, Leicester (United Kingdom)
- ITER-EDA, San Diego, CA (United States)
The precise installation and alignment of large components in an activated and beryllium contaminated fusion device is a problem which must be faced in JET as well as future devices such as ITER. To guarantee the successful alignment of the MKII Divertor in JET it was essential that, early in the design phase, realistic manufacturing and installation tolerances and restrictions were identified and considered. The main components of the MKII divertor structure are an inner and outer ring mounted on a base plate. The overall diameter of the assembly is 6m and is dismantled into 24 sub-assemblies for installation. The structure must be installed very accurately whilst wearing full pressurized suits. As the other major in-vessel components remain unchanged it is important that the new divertor be installed to the same center as these components. Major considerations in the design process were the installation accuracy required, the installation method and restrictions imposed by the existing in-vessel structure. Joints between modules could only be made from one side due to access restrictions. Design of the support system had to be such that minimal modification to the existing in-vessel structure would be required. The tight tolerances necessary to ensure the mechanical integrity of the module joints were compromised by the necessity to have realistic assembly tolerances.
- OSTI ID:
- 505968
- Report Number(s):
- CONF-950905-; ISBN 0-7803-2970-8; TRN: 97:013661
- Resource Relation:
- Conference: 16. IEEE/NPSS symposium on fusion engineering, Champaign, IL (United States), 1-5 Oct 1995; Other Information: PBD: 1995; Related Information: Is Part Of 1995 IEEE 16. symposium on fusion engineering. Volume 1; Miley, G.H.; Elliott, C. [eds.] [Univ. of Illinois, Urbana, IL (United States). Fusion Studies Lab.]; PB: 886 p.
- Country of Publication:
- United States
- Language:
- English
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