Multiple-unit probe pusher and system for driving eddy current i

Details Multiple-unit probe pusher and system for driving eddy current i Multiple-unit probe pusher and system for driving eddy current i

1989-07-06

1992-04-21

Ford, John K.

Heat exchange

With alarm, indicator, signal, register, recorder, test or...

Remotely controlled inspection means

165 76, 242 54R, 376245, 376260, 738665, 738658, 901 1, 901 44, F28F 1100, G21C 1700

Patent

active

051058766

ABSTRACT:
Disclosed is a system for driving inspection probes through steam generator tubes of a nuclear power plant, particularly eddy current probes. The system utilizes a single conduit that is connectable to the tube sheet of a steam generator and comprises a multiple-unit probe pusher having a housing containing a plurality of independently actuable drive paths, a multiple-unit probe storage device including a plurality of independently movable take-up reels, and a guide or deflector device for directing any one probe that is driven from any one of the drive paths of the probe pusher to the single conduit. Preferably, the entire system is also remotely controllable. The system enables one probe to be in use for tube inspection while providing readily available spare probes to replace a defective probe with a minimum of downtime and worker radiation exposure.

REFERENCES:
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patent: 4793044 (1988-12-01), Cartry et al.
patent: 4802379 (1989-02-01), Edajima
patent: 5000681 (1991-03-01), Zafred et al.

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