Induced nuclear reactions: processes – systems – and elements – Handling of fission reactor component structure within...
Patent
1991-12-17
1992-09-22
Wasil, Daniel D.
Induced nuclear reactions: processes, systems, and elements
Handling of fission reactor component structure within...
376307, 29890031, G21C 1300
Patent
active
051494906
ABSTRACT:
A method and apparatus for replacing a nozzle or heater sleeve in a nuclear reactor coolant system pressurizer. The tubular main body portion of the replacement nozzle is threadably received in the nozzle bore after the original heater and damaged heater sleeve have been removed and the nozzle bore partially tapped to provide a threaded area therein. The first or upper end of the main body portion is positioned substantially flush with the interior of the pressurizer. A seal weld is provided between the upper end of the main body portion and the interior of the pressurizer. A flange that extends radially from and adjacent the second or lower end of the main body portion bears against the exterior of the pressurizer when the main body portion is in its installed position inside the heater sleeve bore.
REFERENCES:
patent: 4255840 (1981-03-01), Loch et al.
patent: 5091140 (1992-02-01), Dixon et al.
patent: 5094801 (1992-03-01), Dixon et al.
Brown Steve K.
Dixon Larry D.
Moses Samuel J.
B&W Nuclear Service Company
Edwards Robert J.
LaHaye D. Neil
Wasil Daniel D.
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