Mock-Up Test of Remote Control Machine for the JPDR Biological Shield Concrete Dismantlement

A diamond sawing and coring technique is a dismantling method developed in the JPDR Decommissioning Program conducted by JAERI. The dismantling system for this technique, consisting of a cylindrical geometric robot equipped with a sawing unit and a coring unit, concrete block/core handling devices and so on, will be applied to the dismantlement of the highly activated concrete of the JPDR. A mock-up test was performed from 1987 to 1988 in in order to confirm the performance of the system prior to the actual dismantling. A full-scale concrete structure which simulates the portion of the JPDR biological shield to be dismantled was built and the system devices were assembled to simulate the actual dismantling operation. This paper reports the results of the steel lining concrete cutting tests and block/core handling tests, the efficacy of the damaged blade sharpening, and the applicability of this technique for dismantling the inner cylindrical structure.