Progress and Achievements on the R&D Activities for ITER Vacuum Vessel

Conference · Mon Jan 01 04:00:00 EST 2001

OSTI ID:1003663

Nakahira, M. ^[1]; Koizumi, K. ^[1]; Takahashi, H. ^[1]; Onozuka, M. ^[2]; Ioki, K. ^[2]; Kuzumin, E. ^[3]; Krylov, V. ^[3]; Maslakowski, J. ^[4]; Nelson, Brad E ^[5]; Jones, L. ^[6]; Danner, W. ^[6]; Maisonnier, D. ^[6]

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1. Japan Atomic Energy Research Institute (JAERI)
2. ITER Joint Central Team, Garching, Germany
3. D.V. Efremov Scientific Research Institute, St. Petersburg, Russia
4. Oak Ridge National Laboratory (ORNL)
5. ORNL
6. Max-Planck Institute, Garching, Germany

The ITER vacuum vessel (VV) is designed to be large double-walled structure with a D-shaped crosssection. The achievable fabrication tolerance of this structure was unknown due to the size and complexity of shape. The Full-scale Sector Model of ITER Vacuum Vessel, which was 15m in height, was fabricated and tested to obtain the fabrication and assembly tolerances. The model was fabricated within the target tolerance of 5mm and welding deformation during assembly operation was obtained. The port structure was also connected using remotized welding tools to demonstrate the basic maintenance activity. In parallel, the tests of advanced welding, cutting and inspection system were performed to improve the efficiency of fabrication and maintenance of the Vacuum Vessel. These activities show the feasibility of ITER Vacuum Vessel as feasible in a realistic way. This paper describes the major progress, achievement and latest status of the R&D activities on the ITER vacuum vessel.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1003663
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DEFORMATION
EFFICIENCY
FABRICATION
IAEA
MAINTENANCE
SHAPE
TARGETS
THERMONUCLEAR REACTORS
TOLERANCE
WELDING