Steam generator dual head sludge lance
AssigneeWestinghouse Electric Corp.
InventorEric R. HABERMAN
Life of this patent
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Abstract
A moveable sludge lance (76) said moveable sludge lance having duel lance heads (77, 79) passed through handholes (62) in the side of a nuclear steam generator and into a central tube lane (60) having a central stay rod (61) which cleans with high pressure fluid through the row 1 tubes (85) in the tube lane, where the distance (200) between the dual lance heads (77, 79) is wide enough to allow the dual lance heads to extend beyond the central stay rod (61).
Claims8
A moveable sludge lance for use in cleaning a tube bundle in a tubular steam generator by travel in a center tube lane to a mid point center stay rod, said sludge lance comprising dual lance heads separated a distance greater than the diameter of the central stay rod used in the generator, wherein the dual lance heads can extend beyond the central stay rod, and wherein the dual lance heads have a common frame.
A moveable sludge lance for use in cleaning a tube bundle in a tubular steam generator having a plurality of entry handholes allowing access to a center tube lane, the bundle having a hot leg side and a cold leg side separated by the center tube lane which lane at its mid point has a central stay rod, wherein the moveable sludge lance has dual lance heads fitted with nozzle jets, separated a distance greater than the diameter of the central stay rod, and is inserted into the center tube lane so that the dual lance heads traverse the central tube lane to extend beyond the central stay rod allowing continuous and complete cleaning of the tube bundle;
- wherein the sludge lance moves on a monorail which provides a rigid platform for the dual lance heads, and a rolling kickstand which movement provides a forward support for the monorail where cleaning fluid passes to the moveable sludge lance, so that the dual lance heads traverse the central tube lane to extend beyond the central stay rod allowing continuous and complete cleaning of the tube bundle.
Dependencies are inferred from the claim text.