| Patent application number | Description | Published |
|---|
| 20090001229 | APPARATUS AND METHOD FOR REPAIRING RISER PIPE ELBOW WELD IN BOILING WATER NUCLEAR REACTOR - A support clamp assembly for mechanically securing a thermal sleeve to an elbow conduit in a jet pump of a nuclear reactor vessel, the support clamp assembly including: a tension shaft having a first end extendable through an opening in a sidewall of the elbow conduit and an opposite end with a head; a cruciform assembly having a base with an opening to receive the tension shaft and to abut the head of the shaft, wherein the cruciform assembly seats in the thermal sleeve; a boss slidable over the first end of the tension shaft and having a curved surface seating an outside surface of the elbow conduit, and a coupling device engaging the first end of the tension shaft and abutting the boss, wherein the coupling device places the tension shaft under tension to secure the cruciform assembly to the thermal sleeve and the boss to the elbow conduit. | 01-01-2009 |
| 20090127414 | Apparatus and Method for Repairing a Core Spray Line Pipe Weld Joint - A clamping device supports or structurally replaces a weld joint between connected pipes. The clamping device includes an upper clamp body and a lower clamp body securable on opposite sides of the connected pipes in facing relation, and at least one clamp bolt connecting the upper and lower clamp bodies and extendable through the connected pipes. One of the upper and lower clamp bodies has at least one shaped depression, which receives a complementary shaped clamp bolt nut engageable with the clamp bolt. The shaped depression prevents rotation of the clamp bolt nut. | 05-21-2009 |
| 20090127415 | Apparatus and Method for Repairing a Core Spray Line Elbow Weld Joint - An elbow clamp assembly structurally supports or replaces a connection between a main pipe and an elbow pipe. The elbow clamp assembly includes an upper clamp body and a lower clamp body securable on opposite sides of the main pipe in facing relation. The upper and lower clamp bodies are connected by a clamp bolt extendable through the main pipe. An elbow boss is securable to the elbow pipe, and a cross bolt is extendable through the elbow pipe and connected between the elbow boss and the clamp bolt. | 05-21-2009 |
| 20090127854 | METHOD AND SYSTEM FOR REPAIRING A DOWNCOMER PIPE IN A CORE SPRAY FOR A NUCLEAR REACTOR - A slip joint assembly has been developed for a downcomer pipe in a core spray system of a nuclear reactor pressure vessel, the slip joint assembly including: a housing sleeve formed around a slip joint in the downcomer pipe, wherein an annular gap exists between an inside surface of the housing sleeve and the downcomer pipe; an upper wedge and a lower wedge insertable in the gap; a wedge bolt extending through the gap and extending through the upper wedge and lower wedge, wherein the bolt applies a force pulling the upper and lower wedge together to secure the housing sleeve to the downcomer pipe; an upper pin extending from the housing sleeve into an aperture of an upper section of the downcomer pipe, and a lower pin extending from the housing sleeve into an aperture of a lower section of the downcomer pipe. | 05-21-2009 |
| 20100013221 | Method and apparatus for repairing a flawed welded joint in a core spray piping system - A clamp is disclosed which structurally replaces a cracked P | 01-21-2010 |
| 20100032938 | Method and apparatus for repairing a core spray downcomer pipe slip joint coupling - A slip joint clamp is disclosed which structurally replaces cracked welded joints in the core spray downcomer slip joint coupling, which is part of the lower portion of internal core spray piping internal to a reactor vessel of a Boiling Water Reactor plant. The internal piping delivers core spray cooling water to the reactor core region. The clamp assembly consists of a primary clamp housing and a secondary clamp housing, which are rotationally joined together by a hinge assembly including a hinge pin. The clamp assembly is installed at a desired elevation relative to the downcomer slip joint, and then secured to the downcomer piping by installing coupling bolts and associated coupling bolt keeper nuts that hold the primary and secondary clamp housings in a facing relationship to one another around the downcomer slip joint. | 02-11-2010 |
