Method and device for non-destructive testing of a penetration of a reactor pressure vessel lid
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United States of America Patent
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Jul 5, 1994
Grant Date -
N/A
app pub date -
Sep 30, 1992
filing date -
May 13, 1992
priority date (Note) -
In Force
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Abstract
Previously, only webs between connectors in reactor pressure vessel lids have been examined for incipient cracks by using an ultrasonic scanning head. In order to be able to test the connector penetrated by a bush from an annular gap formed between the connector and the bush, a frame is provided which carries a housing through lockable floating bearings for receiving a rotary plate in the housing. The rotary plate is concentrically associated with a centering piece which is adjustable in the vertical direction and is eccentrically associated with a lifting cylinder which is likewise vertically adjustable. A free end of the lifting cylinder carries a probe drive for inserting a probe into the annular gap. The annular gap is scanned by the probe due to an oscillating movement of the rotary plate.
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