Method and apparatus for repair of nuclear reactor shroud
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United States of America Patent
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Apr 22, 1997
Grant Date -
N/A
app pub date -
Jul 21, 1995
filing date -
Jul 21, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In order to support a shroud against bending, shear, stress and torsion, straps which are preferably formed of the same material as the shroud, are placed in strategic positions with respect to cracks or the like type of weaknesses which have been detected, and fastened in place using a suitable fastening technique. In the preferred embodiments of the invention holes a formed using an EDM technique and bolt units which have an expanding portion are inserted into the holes, torqued and expanded in a manner which fastens the strap to the shroud. Welding and the like type of fastening techniques are not excluded and may used alternatively or in combination with the bolting technique as required.
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