Method and apparatus for repairing a jet pump slip joint
AssigneeGE-Hitachi Nuclear Energy Americas LLC
InventorsLee John Andre, Jack Toshio Matsumoto
Life of this patent
Estimating the term…
Abstract
A jet pump slip joint repair assembly includes at least one clamp and a bushing configured to be inserted in a bore of a diffuser and to surround a portion of an inlet mixer. The clamp includes a gripping surface and a gripping collar. The bushing includes a generally cylindrical sidewall, the sidewall configured to surround the portion of the inlet mixer, a grooved flange on an upper surface of the sidewall, at least one cutout between adjacent portions of the grooved flange, and a groove on an inner, bottom surface of the sidewall. The assembly also includes a seal in the groove. The seal is flexible and formed of a metallic material. The seal is configured to be compressed when the at least one clamp engages the bushing.
Claims5
A method of repairing a jet pump slip joint comprising:
- removing an inlet mixer from a bore of a diffuser;
- machining an inner surface of the bore of the diffuser so as to remove damaged metal and form a substantially smooth inner surface;
- machining an outer surface of the inlet mixer so as to remove damaged metal from the inlet mixer and form a substantially smooth outer surface;
- inserting a bushing in the bore of the diffuser, the bushing including,
- a grooved flange on an upper surface, at least one cutout between adjacent portions of the grooved flange, the grooved flange configured to receive a gripping portion of a clamp, and
- an internal groove on an inner, bottom surface of the bushing, a seal inserted in the internal groove of the bushing.
Dependencies are inferred from the claim text.