Metal working – Means to assemble or disassemble – Nuclear device
Patent
1983-12-30
1986-05-06
Goldberg, Howard N.
Metal working
Means to assemble or disassemble
Nuclear device
29421R, 324208, B23P 1900, B23P 1700, G01B 714
Patent
active
045862494
ABSTRACT:
An improved fluid mandrel having an eddy current probe connected thereto is disclosed herein. The eddy current probe generally comprises a probe body which is detachably connectable to the bottom of a fluid mandrel on one end, and a source of hydraulic fluid on the other end. The probe body includes a pair of sensing coils which are separated along the longitudinal axis of the body by a distance approximately equal to the thickness of the metallic structure desired to be detected. The improved mandrel finds particular application in performing expansions which eliminate the clearance between heat exchange tubes extending through the baffle plates in nuclear steam generators. In such an application, the sensing coils of the probe are longitudinally spaced the same distance as the thickness of the baffle plates in order to generate a sharp and unambiguous electronic signal indicative of the relative positions of the mandrel and the baffle plate.
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Chizmar David A.
Cooper Frank W.
Costlow Annette M.
Goldberg Howard N.
Nichols Steven
Satina D. M.
Westinghouse Electric Corp.
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