Method and device for repairing fuel assemblies of boiling-water

Metal working – Method of mechanical manufacture – Repairing

Patent

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Details

29400N, 29407, 294262, 29464, 29723, 33502, 269 43, 376245, 376251, 376450, B23P 1904, G21C 1700, G21C 1900

Patent

active

046973222

ABSTRACT:
A method of repairing under water a boiling water reactor-fuel assembly having a fuel assembly channel and an upper grid plate by means of a channel stripping machine, disassembling the upper grid plate, determining a damaged fuel rod and exchanging the damaged fuel rod for another fuel rod by means of a fuel rod exchanging device, which includes, after stripping off the fuel assembly channel and disassembling the upper grid plate at the location thereof in the channel stripping machine, placing on the fuel assembly a guide box with which the fuel rods of the fuel assembly are centered, then placing thereon an indicator plate and determining the varying growth of the fuel rods, and replacing the indicator plate by a centering plate to which the fuel rod-exchanging device is coupled and a device for carrying out the method.

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