Method and apparatus for inspecting the rods of a nuclear reactor control cluster
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United States of America Patent
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Nov 10, 1998
Grant Date -
N/A
app pub date -
Aug 27, 1997
filing date -
Dec 29, 1995
priority date (Note) -
Expired
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Abstract
The apparatus for inspecting the rods of a cluster insertable in the core of a nuclear reactor comprises a body provided with sliding guide means for rods in m different orientations of the cluster, m being a submultiple of the number n of rods in the cluster, and a measurement jig carrying n/m heads (16) for eddy current examination and n/m probes (18) for ultrasound scanning placed on different guide paths. Each ultrasound probe (18) is constituted by an annular support surrounding a rod path and carrying a ring of individual transducers. The transducers are connected to a circuit for sequentially exciting the transducers in successive groups, causing the tube to be scanned circumferentially, and for electronic focusing towards the surface of a tube travelling on the path.
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