Method and apparatus for repair of nuclear reactor shroud

Details Method and apparatus for repair of nuclear reactor shroud Method and apparatus for repair of nuclear reactor shroud

1997-01-17

1998-07-14

Jordan, Charles T.

Induced nuclear reactions: processes, systems, and elements

Handling of fission reactor component structure within...

376293, 376302, 376461, 2940201, 29890031, G21C 900, B23P 1526

Patent

active

057816034

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 are 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.

REFERENCES:
patent: 5065490 (1991-11-01), Wivagg et al.
patent: 5402570 (1995-04-01), Weems et al.
patent: 5430779 (1995-07-01), Baversten et al.
patent: 5488643 (1996-01-01), Baversten
patent: 5530219 (1996-06-01), Offer et al.
patent: 5623526 (1997-04-01), Wivagg
Patent Abstracts of Japan (English Translations), JP-08-122485, JP-08-233971, JP-08-278390, 1996 JPO.

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