Pressure vessel penetration sealing device

Details Pressure vessel penetration sealing device Pressure vessel penetration sealing device

1992-12-23

1994-03-22

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

Seal arrangements

376463, 138 89, 138 91, 165 76, G21C 13067

Patent

active

052971872

ABSTRACT:
A device for sealing a penetration in a pressurizer of a nuclear steam supply system includes a hollow cylinder adapted to be inserted into the heater sleeve, in place of the heater. The cylinder includes a nose portion formed with a number of axially extending slots defining therein a number of radially displaceable segments, each of which has an outwardly extending flange, proximate its distal end, which is engageable with the heater sleeve to resist blowout. A rod, inserted into the cylinder, seals the passage therethrough while locking the displaceable nose portion segments in their sleeve-engaging position. An annular soft nickel band on the outside of the cylinder engages the inner surface of the heater sleeve to provide an effective seal therebetween.

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