Cleaning and liquid contact with solids – Apparatus – For work having hollows or passages
Patent
1988-12-15
1991-03-26
Stinson, Frankie L.
Cleaning and liquid contact with solids
Apparatus
For work having hollows or passages
134102, 1341044, 134184, 134111, 165 95, B08B 310
Patent
active
050020790
ABSTRACT:
Both a method and system are disclosed herein for removing debris from nuclear fuel assemblies which have been in service in a nuclear reactor. The method generally comprising immersing the fuel assembly in a pool of water which may be the cask loading pit of a nuclear facility, securing the fuel assembly in a spent fuel rack, enveloping the spent fuel rack in a rectangular sleeve in order to isolate the water surrounding the fuel assembly from the balance of the water in the cask loading pit, and discharging a series of pressure pulses into the isolated water from a pressure pulse source to create shock waves that exert momentary forces on the fuel rods sufficient to dislodge debris therefrom but insufficient to create a liftoff between the fuel rods and the spring fingers of the grids which retain them within the fuel assembly.
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Cadwell Dennis J.
Franklin Richard D.
Stinson Frankie L.
Westinghouse Electric Corp.
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