Metal working – Means to assemble or disassemble – Nuclear device
Patent
1998-05-29
1999-10-12
Cuda, I
Metal working
Means to assemble or disassemble
Nuclear device
29727, 29890031, B23P 1526
Patent
active
059640294
ABSTRACT:
An apparatus for repairing cracked core spray supply piping in a boiling water reactor vessel includes a pair of clamps extending circumferentially around the piping on opposite sides of a crack and a preloading mechanism urging the clamps toward one another to apply and maintain an axially compressive load on the piping tending to close the crack. For vertical sections of core spray supply piping, the clamps are secured at vertically spaced locations with each of the clamps including a first jaw extending circumferentially around a first portion of the piping and including a first opening oriented substantially parallel to a longitudinal axis of the piping and an elongate passage or channel oriented substantially perpendicular to and in communication with the first opening. A second jaw extends circumferentially around a second portion of the pipe in horizontally opposed relation to the first jaw and includes an elongate extension slidably received in the elongate channel and defining a second opening partially aligned with the first opening, with a wedge being movably disposed in the aligned openings to cause the second jaw to move relative to the first jaw in a direction substantially perpendicular to the longitudinal axis of the piping in response to straight, vertical operations. For horizontal sections of core spray supply piping, the clamps are secured at horizontally spaced locations with each of the clamps having a pair of jaws extending circumferentially around the piping in opposed relation and a horizontal preloading mechanism extending between the jaws in tension, the horizontal preloading mechanism being similar to the clamping mechanism used for vertical sections to facilitate installation using straight, vertical operations.
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Engineering drawing of clamp used by MPR Associates in 1980's, one page.
Sylvester William E.
Weems Sterling J.
Cuda I
MPR Associates, Inc.
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