Induced nuclear reactions: processes – systems – and elements – Testing – sensing – measuring – or detecting a fission reactor... – Leak detection
Patent
1992-03-17
1995-05-30
Walsh, Donald P.
Induced nuclear reactions: processes, systems, and elements
Testing, sensing, measuring, or detecting a fission reactor...
Leak detection
376204, 376249, G21C 1700
Patent
active
054208980
ABSTRACT:
The manipulator has a base including an elongated bar having a center between first and second opposed ends. Fluidly actuated end effectors at the first and second ends of the base, are extensible for bracing the base against opposed support surfaces on the steam generator, such as locator pins situated within the clamp ring. A rigid arm is connected to the center of the base and extends radially to a free end. A first drive means is provided for remotely rotating the arm around a rotation axis passing through the center perpendicularly to the base. The preferred transducer means include a bracket situated at the free end of the arm, a pair of radially spaced apart mounting posts supported by the bracket and extending in parallel with the rotation axis, and a transducer shoe assembly carried by each post. A transducer element is mounted in each of the shoe assemblies. A second drive means is carried by the arm and connected to the bracket for remotely adjusting the radial position of the transducer means at the arm free end. Preferably, the posts and transducer elements are spaced apart so as to straddle the clamp ring in the steam generator head. By adjusting the radial position of the posts after each 360.degree. revolution of the arm, substantially all of the annular region of clad material immediately adjacent the ring, can quickly be inspected.
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The Nuclear Reactor Vessel Inspection Tool Using an Ultrasonic Method by Yamaguchi Conference on Periodic Inspection of Pressure Vessels. London, England (Sep. 11) May 1972.
Chelliah Meena
Combustion Engineering Inc.
Mulholland John H.
Ristas L. James
Walsh Donald P.
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