Method and apparatus for a riser pipe repair with compression
AssigneeGE-Hitachi Nuclear Energy Americas LLC
InventorsBruce J. Lentner, Michael S. Defilippis, Khaled M. Ewida, Robin D. Sprague, Luke A. Davis
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AssigneeGE-Hitachi Nuclear Energy Americas LLC
InventorsBruce J. Lentner, Michael S. Defilippis, Khaled M. Ewida, Robin D. Sprague, Luke A. Davis
Estimating the term…
A method and apparatus for repairing and/or reinforcing a Boiling Water Reactor (BWR) jet pump riser pipe. The repair includes attaching two collars to the riser pipe using match drilling to drill holes through the collars and the riser pipe and plugging the holes with expandable plugs. Support columns are attached to the collars. Brace supports are slideably attached to the support columns. Gaps between each brace support and its respective collar are then narrowed as ratchet bolts may apply a force that pulls downward on an upper collar and pulls upward on a lower collar, thereby exerting a compression force on the riser pipe. A clamp assembly may also be located between the two collars that applies a hoop force on the riser pipe.
A riser pipe repair, comprising:
The riser pipe repair, wherein, p1 the upper support columns include first and second upper/inner support columns and first and second upper/outer support columns;
A method of repairing a riser pipe, comprising:
The method of claim 24, further comprising:
A riser pipe repair installed on a riser pipe, comprising:
Dependencies are inferred from the claim text.