Nuclear steam generator wrapper closure assembly and method of i

Details Nuclear steam generator wrapper closure assembly and method of i Nuclear steam generator wrapper closure assembly and method of i

1992-08-28

1993-10-05

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

Seal arrangements

For nozzle

376203, G21C 1300

Patent

active

052512410

ABSTRACT:
An apparatus and method for plugging an access hole in a steam generator, having a shell, a wrapper, and an annulus positioned between the shell and the wrapper, includes attaching a plate, having a first mating connection and at least one aperture, to the wrapper of the steam generator. A plug, having a second mating connection and at least one aperture, is positioned within a bore of the plate. The plug is rotated approximately 90.degree. for engaging the first mating connection of the plate with a second mating connection of the plug and for aligning the aperture of the plug with the aperture of the plate. A sleeve, having a bore therethrough and at least one aperture, is positioned on the plug and the aperture of the sleeve is aligned with the apertures of the plate and the plug. A pin is installed in the aligned apertures of the plate, the plug, and the sleeve. A retaining nut is positioned on the plug after installation of the sleeve.

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