Narrow Annulus Permanent Canal Seal Plate

摘要

An improved permanent seal for a refueling canal of a nuclear power plant is disclosed and claimed. The seal includes a support structure and a membrane. The support structure includes a first annular plate with a number of ribs connected to and extending from a to surface of the support structure annular plate. The support structure is positioned atop the shield wall on the refueling canal floor, encircling and positioned near the annulus. The membrane includes a first end that is connected to the seal ledge and a second end that is connected to the refueling canal floor. The membrane has a stepped profile, with side walls extending substantially perpendicularly from a central annular plate to form a pocket configured to fit over the support structure. Loads imparted to the membrane are transferred through the support structure annular plate and ribs to the refueling canal floor.

主权项

1. A permanent seal for providing a liquid barrier over an annular space between a nuclear reactor vessel seal ledge and a surrounding annular ledge, comprising:
a support structure including an annular plate having a first surface and a second surface and a plurality of ribs coupled to said support structure annular plate second surface at first ends thereof and to the annular ledge at second ends thereof; and a membrane having a first end coupled to the vessel seal ledge, a second end coupled to the annular ledge, and an annular plate extending between said membrane first and second ends, said membrane annular plate having a first surface and a second surface; wherein said support structure and said membrane are positioned such that said membrane annular plate second surface is adjacent said support structure annular plate first surface.