| 摘要 |
PROBLEM TO BE SOLVED: To cut efficiently when an activated upper lattice plate is shredded before disposal in the water in an apparatus storing pool of a nuclear power plant. SOLUTION: While allowing an abrasive water jet to hit onto the upper lattice plate 1 from a cutting nozzle 13 in the water in the apparatus storing pool 14, the cutting nozzle 13 is moved from the upside to the downside by a mast 38 of a multi-axial manipulator, to thereby execute the first cutting 8 of a crossing part of the lattice on the upper lattice plate 1 along a cutting line oblique to the lattice plate. Thereafter, while moving the cutting nozzle 13 from the upside to the downside by the mast 38 of the multi-axial manipulator, the second cutting 9 is executed at a position adjacent to the crossing part of the lattice of the upper lattice plate 1. The two-spot cutting is executed at the crossing part of each lattice, to thereby cut and divide the lattice plate of the upper lattice plate 1 into sawtooth-shaped cut pieces 25 including the lattice plate existing on two sides of the lattice. COPYRIGHT: (C)2007,JPO&INPIT
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