Induced nuclear reactions: processes – systems – and elements – Seal arrangements
Reexamination Certificate
2007-12-07
2010-10-12
Palabrica, Rick (Department: 3663)
Induced nuclear reactions: processes, systems, and elements
Seal arrangements
C376S205000
Reexamination Certificate
active
07813464
ABSTRACT:
A permanent cavity seal ring that replaces the function of the temporary cavity seal ring typically used in narrow thermal expansion gap pressurized water reactors, to seal the gap between the reactor cavity well and the reactor during refueling. The permanent seal ring uses a C-shaped flexure that is shielded by a rigid cantilevered support arm from any accidentally dropped equipment from above in the refueling canal. The construction accommodates the thermal expansion of the reactor vessel while permitting the reactor cavity cooling air to exit the annulus between the vessel and the reactor cavity wall during plant operation, without a significant increase in pressure drop.
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Palabrica Rick
Westinghouse Electric Co LLC
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