Publications / 1988 Proceedings of the 5th ISARC, Tokyo, Japan

Remotely Controlled Machine for Biological Shield Concrete Dismantlement

Hisashi Nakamura, Hidenori Gohda, Mitsuo Yokota, Makoto Ichikawa, Seishi Suzuki, Tetsuo Hasegawa
Pages 571-580 (1988 Proceedings of the 5th ISARC, Tokyo, Japan, ISSN 2413-5844)

The Japan Atomic Energy Research Institute (JAERI) has been developing necessary dismantling techniques to decommission the Japan Power Demonstration Reactor (JPDR) in the JPDR Decommissioning Program since 1981. A cylindrical geometric machine equipped with diamond sawing and coring units has been developed for activated biological shield dismantlement. This machine is suspended from a crane and moves within the inner cylindrical shaped wall fixes its position with built-in outriggers. Cutting process control and point-to-point control are used for automatic cutting. The paper summarizes current status of the biological shield, diamond sawing and coring technique and dismantling sequence, design of the machine, and a dismantling system.

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