Metal working – Method of mechanical manufacture – Heat exchanger or boiler making
Patent
1996-11-27
1998-11-24
Cuda, Irene
Metal working
Method of mechanical manufacture
Heat exchanger or boiler making
2940214, 29723, B23P 1500
Patent
active
058391924
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.
REFERENCES:
patent: 4572548 (1986-02-01), Porowski et al.
patent: 4575129 (1986-03-01), Porowski
patent: 4585091 (1986-04-01), Budd
J.S. Abel, M.C. Strait, "Applicability of Pipelocks as a Remedy for Intergranular Stress Corrosion Cracking in BWRs", Int. J. Pres. Ves. & Piping25, 1986, pp. 25-46.
J. S. Abel, "Mechanical Methods of Improving Resistance to Stress Corrosion Cracking in BWR Piping Systems", Int. J. Pres. Ves. & Piping34, 1988, pp. 17-29.
Sylvester William E.
Weems Sterling J.
Cuda Irene
MPR Associates, Inc.
LandOfFree
Method and apparatus for repairing cracked core spray supply pip does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for repairing cracked core spray supply pip, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for repairing cracked core spray supply pip will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1692110