Method and apparatus for a jet pump slip joint internal seal
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United States of America Patent
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Jul 2, 2013
Grant Date -
Mar 8, 2012
app pub date -
Sep 7, 2010
filing date -
Sep 7, 2010
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Abstract
A method and apparatus for a Boiling Water Reactor (BWR) jet pump slip joint internal seal for an interface between an inlet mixer and a diffuser of a jet pump assembly. The internal seal effectively mitigates leakage and slip joint flow induced vibration (FIV) between the inlet mixer and diffuser to reduce damage to many of the jet pump assembly components. A metallic seal of the slip joint internal seal flares out to conform the internal seal to a range of gap sizes, and compresses or springs back to nominal dimensions as thermal expansion and contraction occurs. The internal seal is self-expanding/self-tightening, as the internal seal flares further outward as a result of the internal pressure caused by flowing fluids in an operating jet pump assembly.
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