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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.
IAEA 2001
