Metal working – Method of mechanical manufacture – Heat exchanger or boiler making
Patent
1994-02-02
1995-04-04
Cuda, Irene
Metal working
Method of mechanical manufacture
Heat exchanger or boiler making
2940201, 2940215, 2940219, B23P 1526
Patent
active
054025702
ABSTRACT:
A method of repairing nuclear reactor core shrouds having horizontal cracks in heat affected zones of welds includes applying vertical compressive forces to the shroud in situ to urge opposed surfaces of the cracks toward one another. A plurality of tie rods, angularly spaced about the shroud periphery, is used to selectively apply the longitudinally compressive forces. Preferably, the method utilizes existing hardware secured to the shroud for attaching the tie rods thereto. The tie rods may be used in connection with horizontal and/or vertical spacers inserted between the shroud and the reactor vessel. Horizontal spacers serve to resist horizontal seismic loads and hold the shroud in place in spite of cracking. Vertical spacers resist vertically upward loads resulting from main steam line breaks.
REFERENCES:
patent: 3011962 (1961-12-01), Koch et al.
patent: 3116214 (1963-12-01), Greenstreet
patent: 3627634 (1971-12-01), Guenther et al.
patent: 3719555 (1973-03-01), Davis
patent: 3720581 (1973-03-01), Kaser
patent: 3744660 (1973-07-01), Gaines et al.
patent: 3785924 (1974-01-01), Notari
patent: 3926722 (1975-12-01), Dupen
patent: 4057162 (1977-11-01), Gross
patent: 4111327 (1978-09-01), Janakiev
patent: 4192718 (1980-03-01), Janakiev
patent: 4265010 (1981-05-01), Doss et al.
patent: 4285503 (1981-08-01), Calhoun et al.
patent: 4299658 (1981-11-01), Meuschke et al.
patent: 4562332 (1985-12-01), Walter et al.
patent: 4585091 (1986-04-01), Budd
patent: 4652426 (1987-03-01), Boyle et al.
patent: 4789520 (1988-12-01), Morimoto et al.
patent: 5274683 (1993-12-01), Broda et al.
Cole Noman
Weems Sterling J.
Cuda Irene
MPR Associates, Inc.
LandOfFree
Method for repairing boiling water reactor shrouds does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for repairing boiling water reactor shrouds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for repairing boiling water reactor shrouds will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2373213