Method of replacing a heater nozzle in a nuclear reactor pressur

Details Method of replacing a heater nozzle in a nuclear reactor pressur Method of replacing a heater nozzle in a nuclear reactor pressur

1991-08-16

1992-02-25

Wasil, Daniel D.

Induced nuclear reactions: processes, systems, and elements

Handling of fission reactor component structure within...

376203, 376292, G21C 1300

Patent

active

050911406

ABSTRACT:
A replacement heater sleeve for 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: 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: 4707002 (1987-11-01), Boissier et al.

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