Sealing device for nuclear power reactor

Details Sealing device for nuclear power reactor Sealing device for nuclear power reactor

1988-03-28

1991-04-09

Bentley, Stephen C.

Induced nuclear reactions: processes, systems, and elements

Seal arrangements

277110, 277190, G21C 13028

Patent

active

050063006

ABSTRACT:
A sealing device for sealing a leak occurring inside a reactor pressure vessel at the vicinity of a weld between a control rod drive (CRD) tube and a surrounding CRD stub tube which communicates with an opening in the wall of the pressure vessel. An inner sealing sleeve of a soft metallic material and with an outer frusto-conical surface is fitted over the tube and the CRD stub tube, and an outer sealing sleeve of a hard metallic material and with an inner frusto-conical surface is fitted over the inner sealing sleeve. On each side of the crack special contact surfaces are formed between the inner sealing sleeve and the tube or the CRD stub tube. As the outer sealing sleeve is pressed in over the inner sealing sleeve, the inner sealing sleeve is pressed by the frusto-conical surfaces, moving against each other, against the tube and the CRD stub tube, thus providing sealing at the contact surfaces.

REFERENCES:
patent: 3468566 (1969-09-01), Nietzel
patent: 4480841 (1984-11-01), Schukei et al.
patent: 4611813 (1986-09-01), Guerrero
patent: 4826217 (1989-05-01), Guerrero

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