Method for servicing a steam generator

Details Method for servicing a steam generator Method for servicing a steam generator

F - Mech Eng,Light,Heat,Weapons

22

B

341/100

F22B 37/00 (2006.01) F28G 15/00 (2006.01) G12B 5/00 (2006.01)

Patent

CA 1122309

-39- W.E. 47,863 Abstract A servicing machine for a steam generator is accurately set up in the generator channel head with a pivoted arm mounted for rotation in a plane parallel to the tubesheet. The angular position of the arm, the longitudinal position of a carriage mounted on the arm and the vertical position of a platform on the carriage are remotely controlled to maneuver a probe used in mapping the precise location of the thousands of holes in the tubesheet. Various operations are then performed at each precise hole location by tools carried by the arm mounted carriage to prepare for installation of new tubing. The operation of a pair remotely controlled pivoted arms, one on each side of the channel head divider plate, is coordinated to automatically position the ends of U-shaped tubes in corresponding holes in the tubesheet on opposite sides of the divider plate and to secure the same in place.

337276

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