Steam generator sludge removal method

Details Steam generator sludge removal method Steam generator sludge removal method

1982-08-23

1985-01-08

Favors, Edward G.

Liquid heaters and vaporizers

Cleaning

Blow off

165 95, F22B 3754

Patent

active

044921861

ABSTRACT:
A method of removing sludge deposits from the tube plate of a steam generator of the type typically found in a nuclear electric generating plant involves inserting a jet lance into a handhole in the shell of the steam generator just above the tube sheet and along the tube lane, and inserting a flexible suction hose in that or another handhole. A jet nozzle on the lance is directed along one passageway defined by adjacent rows of tubes. The suction hose is adjusted until a suction opening at its end is aligned at the peripheral end of the one tube passageway. Then the sludge is jet blasted with a jet of cleaning fluid from the nozzle, and sufficient suction is applied to the hose so that all of the fluid and entrained sludge is sucked up as it issues from the peripheral end of the tube passageway.

REFERENCES:
patent: 906652 (1908-12-01), Nicholson et al.
patent: 1158948 (1915-11-01), McLean
patent: 1696005 (1928-12-01), Kothe
patent: 3915122 (1975-10-01), Schroder
patent: 4037569 (1977-07-01), Bennett et al.
patent: 4079701 (1978-03-01), Hickman et al.
patent: 4276856 (1981-07-01), Dent et al.
patent: 4407236 (1983-10-01), Schukei

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