Tube support system for nuclear steam generators

Details Tube support system for nuclear steam generators Tube support system for nuclear steam generators

F - Mech Eng,Light,Heat,Weapons

22

B

F22B 37/20 (2006.01) F22B 37/66 (2006.01) F28D 7/00 (2006.01) F28D 7/06 (2006.01) F28F 9/013 (2006.01)

Patent

CA 2673885

Method and apparatus in a steam generator that employs tube support plates within a shroud that is in turn disposed within a shell. The tube support plates are made of a material having a coefficient of thermal expansion lower than that of the shroud. The tube support plates are aligned during fabrication, with minimal clearances between components. Using a tube support displacement system, a controlled misalignment is then imposed on one or more tube support plates, as the steam generator heats up. Displacement to produce misalignment is produced only when the steam generator is heated. The tube support plate displacement system has only one part, a push rod, which is internal to the steam generator shroud, thereby minimizing the potential of loose parts. The tube support plate displacement system can be used to provide controlled misalignments on one or more tube support plates, in the same or varying amounts and directions, and with one or more apparatus being provided for any individual tube support plate.

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