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(ITERP1/24) Integration Test of ITER Full-Scale Vacuum Vessel Sector

M. Nakahira1, K. Koizumi1, K. Oka1, Y. Itou1, H. Takahashi1, E. Tada1, K. Ioki2, G. Johnson2, M. Onozuka2, Y. Utin2, G. Sannazzaro2, K. Takahashi2, B. Nelson3, J. Maslakowski3, V. Krylov4 and E. Kuzmin4

1 Japanese Home Team, Japan Atomic Energy Research Institute (JAERI), Japan
2 ITER Joint Central Team (JCT), Garching Joint Work Site, Garching, Germany
3 US Home Team, Oak Ridge National Laboratory/Boeing Roketdyne Propulsion and Power, USA
4 RF Home Team, Efremov Institute, St. Petersburg, Russian Federation

Abstract.  The full-scale Sector Model Project, which was initiated in 1995 as one of the Large Seven R&D Projects, completed all R&D activities planned in the ITER-EDA period with the joint effort of the ITER Joint Central Team (JCT), the Japanese, the Russian Federation (RF) and the United States (US) Home Teams. The fabrication of a full-scale 18 toroidal sector, which is composed of two 9 sectors spliced at the port center, was successfully completed in September 1997 with the dimensional accuracy of ± 3 mm for the total height and total width. Both sectors were shipped to the test site in JAERI and the integration test was begun in October 1997. The integration test involves the adjustment of field joints, automatic Narrow Gap Tungsten Inert Gas (NG-TIG) welding of field joints with splice plates, and inspection of the joint by ultrasonic testing (UT), which are required for the initial assembly of ITER vacuum vessel. This first demonstration of field joint welding and performance test on the mechanical characteristics were completed in May 1998 and the all results obtained have satisfied the ITER design. In addition to these tests, the integration with the mid plane port extension fabricated by the Russian Home Team, and the cutting and re-welding test of field joints by using full-remotized welding and cutting system developed by the US Home Team, are planned as post EDA activities.

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IAEA 2001