Method and apparatus for a riser repair with compression

Method and apparatus for a riser repair with compression

A method and apparatus for repairing and/or reinforcing a Boiling Water Reactor (BWR) jet pump riser pipe (1). The repair (20) includes attaching two collars (20a1, 20a1', 20b1, 20b1') to the riser pipe using match drilling to drill holes through the collars and the riser pipe and plugging...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: DAVIS, LUKE A, DEFILIPPIS, MICHAEL S, EWIDA, KHALED M, LENTNER, BRUCE J
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
BLASTING
HEATING
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
LIGHTING
MEASURING
MECHANICAL ENGINEERING
METHODS OF STEAM GENERATION
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
NUCLEAR REACTORS
PHYSICS
STEAM BOILERS
STEAM GENERATION
TESTING
WEAPONS
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Beschreibung
Zusammenfassung:A method and apparatus for repairing and/or reinforcing a Boiling Water Reactor (BWR) jet pump riser pipe (1). The repair (20) includes attaching two collars (20a1, 20a1', 20b1, 20b1') to the riser pipe using match drilling to drill holes through the collars and the riser pipe and plugging the holes with expandable plugs (40). Support columns (20a4, 20a4', 20a5, 20a5', 20b4, 20b4', 20b5, 20b5') are attached to the collars. Brace supports (20a2, 20a2', 20a3, 20a3', 20b2, 20b2') are slideably attached to the support columns. Gaps (G) between each brace support and its respective collar are then narrowed as ratchet bolts (50a, 50a1, 50b, 50b1) 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 (30) may also be located between the two collars that applies a hoop force on the riser pipe.