Plug for reactor pressure vessel nozzle

Details Plug for reactor pressure vessel nozzle Plug for reactor pressure vessel nozzle

1982-02-10

1984-03-13

Cangialosi, Sal

Induced nuclear reactions: processes, systems, and elements

Seal arrangements

For nozzle

376260, G21C 1904

Patent

active

044366922

ABSTRACT:
There are disclosed method and apparatus for plugging the underwater recirculating nozzle of a boiling water reactor vessel. The method includes the lowering of a plug by a secondary cable into the annular space between the vessel sidewall and the nuclear fuel shroud. The cable is displaced outwardly, permitting the plug to enter the space between the sidewall and the jet pumps. Cable and plug are then shifted laterally into position over the nozzle, the weight of the plug being taken by a primary cable which lowers the plug into position. A special apparatus is provided which rests upon the core shroud and performs the steps of displacing and laterally shifting the cable.

REFERENCES:
patent: 3282793 (1966-11-01), Jamrog
patent: 3713969 (1973-01-01), Cahill, Jr.
patent: 4035232 (1977-07-01), Kube
patent: 4066498 (1978-01-01), Hoffmann et al.
patent: 4077837 (1978-03-01), Schabert et al.
patent: 4100019 (1978-07-01), Groff et al.

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