Measuring and testing – Vibration – By mechanical waves
Patent
1982-03-08
1984-10-02
Birmiel, Howard A.
Measuring and testing
Vibration
By mechanical waves
73640, 376249, 376252, G01N 2904, G21C 1700
Patent
active
044740646
ABSTRACT:
An ultrasonic flaw detector for detecting any flaw existing in the inner peripheral corner section of the joint portion between the barrel of a nuclear reactor pressure vessel and each of a plurality of cylindrical nozzles projecting from the barrel, by means of an ultrasonic wave applied from the outer peripheral corner section of the joint portion. The flaw detector has a probe pivotable around an axis which is made to follow up the locus of the center of curvature in the rounded surface of the outer peripheral corner section during the movement of the probe around the nozzle. According to this arrangement, it is possible to achieve a full automatic and remote control of the flaw detector except the attaching and detaching of the same, and to facilitate the processing of the signals representing the result of the flaw detection.
REFERENCES:
patent: 3765229 (1973-10-01), Spencer et al.
patent: 3863496 (1975-02-01), Hiramatsu et al.
patent: 3934457 (1976-01-01), Clark et al.
patent: 4117733 (1978-10-01), Gugel
patent: 4131018 (1978-12-01), Muller et al.
patent: 4169758 (1979-10-01), Blackstone et al.
patent: 4368644 (1983-01-01), Wentzell
"Mechanized Equipment for In-Service Inspection of Nuclear Reactors", Lautzenheiser, Conference on Periodic Inspection of Pressure Vessels, London, England, May 1972, pp. 205-220.
Hosono Tatsukuma
Kajiyama Shigeru
Naruse Akisuke
Takaku Kazuo
Birmiel Howard A.
Hitachi , Ltd.
Hitachi Engineering Co. Ltd.
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