Method and apparatus for carrying out the in situ inspection of

Details Method and apparatus for carrying out the in situ inspection of Method and apparatus for carrying out the in situ inspection of

1990-04-17

1992-01-07

Hunt, Brooks H.

Induced nuclear reactions: processes, systems, and elements

Testing, sensing, measuring, or detecting a fission reactor...

376260, 73623, G21C 1700

Patent

active

050789546

ABSTRACT:
Method and apparatus for carrying out the in situ inspection of the shaft of a pump. A spacer coupling or link is manually removed from a limited access area intermediate the pump drive and top of the pump shaft. Inspection then is carried out through a previously formed inspection bore extending concentrically along the interior of the shaft. A probe supported by an extension assembly is lowered into the inspection bore until characterizable portions of the shaft such as a labyrinth seal region are identified. A discrete small region of interest which will initially evidence any fault condition then is surveyed with a raster scan movement of the inspection probe. Lower components of the region of interest are also identified by a next adjacent characterizable region such as a fillet welding for a journal assembly. Because of the limited longitudinal extent of the region of interest, the raster type movement of the probe becomes available. A calibration mock-up of the shaft is employed to provide ultrasonic signal readout information to apprise the operator of the presence of characterizable regions and the effectiveness of inspection transducer operation.

REFERENCES:
patent: 3810384 (1974-05-01), Evans
patent: 3961523 (1976-06-01), Cornforth
patent: 4394345 (1983-07-01), De Briere et al.
patent: 4597294 (1986-07-01), Brill, III et al.
patent: 4899590 (1990-02-01), Light et al.

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