Articulated sludge lance

Induced nuclear reactions: processes – systems – and elements – Fission reactor material treatment – Impurity removal

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Details

376310, 122387, 122392, G21C 1942

Patent

active

049801201

ABSTRACT:
An articulated lance for cleaning sludge located between steam generator tubes is disclosed. A plurality of radius blocks are attached to the end of manipulator member and are actuatable by a cam assembly to form an arc permitting the lance to be received between adjacent tubes within a tube bundle. A plurality of fluid passageways interconnect a fluid inlet on the manipulator member with one or more outlet orifices adjacent the end of the lance. The outlet orifices are positioned outwardly with respect to the end of the manipulator member so that fluid passing therethrough can be directed to impinge upon sludge surrounding the tubes. A spring backing place biases the radius blocks and the manipulator member back into the same plane upon deactuation of the cam assembly.

REFERENCES:
patent: 4424769 (1984-01-01), Charamathieu et al.
patent: 4676201 (1987-06-01), Lahoda et al.
patent: 4715324 (1987-12-01), Muller et al.
patent: 4757785 (1988-07-01), Klahn et al.

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