Induced nuclear reactions: processes – systems – and elements – Reactor protection or damage prevention – With pressurizer means
Patent
1990-01-22
1992-03-10
Wasil, Daniel D.
Induced nuclear reactions: processes, systems, and elements
Reactor protection or damage prevention
With pressurizer means
16510432, 2940207, 29890036, G21C 1300
Patent
active
050948016
ABSTRACT:
A replacement heater sleeve for a nuclear reactor coolant system pressurizer and method for replacing a damaged original heater nozzle. The original heater and heater nozzle are removed from the pressurizer and the original bore is enlarged. An outer sleeve is installed in the enlarged bore on the same center as the original heater nozzle and is substantially flush with the interior of the pressurizer. The outer sleeve is welded to the pressurizer on its interior and exterior surfaces. An inner sleeve is installed in the inner diameter of the outer sleeve and extends beyond the outer sleeve into the pressurizer. The inner sleeve is welded to the lower end of the outer sleeve and is provided with an inner diameter sized to receive a heater of the same size as that originally installed in the pressurizer. The inner sleeve also maintains the original heater alignment in the pressurizer.
REFERENCES:
patent: 2693026 (1954-11-01), Simpelaar
patent: 3114414 (1963-12-01), Judd
patent: 4135552 (1979-01-01), Mendolia
patent: 4255840 (1981-03-01), Loch et al.
patent: 4319961 (1982-03-01), Coussau et al.
patent: 4425963 (1984-01-01), Scholz et al.
patent: 4717529 (1988-01-01), Merkovsky et al.
Dixon Larry D.
Snow Fred L.
Stuckey Kenneth B.
Edwards Robert J.
LaHaye D. Neil
The Babcock & Wilcox Company
Wasil Daniel D.
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