VIBRATION REDUCTION TECHNIQUES FOR JET PUMP SLIP JOINTS
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United States of America Patent
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Issued Date -
Aug 30, 2012
app pub date -
Feb 24, 2012
filing date -
Feb 25, 2011
priority date (Note) -
Abandoned
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Abstract
A method for retrofitting a boiling water reactor is provided. The method includes removing a mixing chamber from a slip joint defined by a diffuser and the mixing chamber, the mixing chamber having an inner surface and a bottom edge directing flow to the diffuser such that a recirculation zone at an entrance to the slip joint creates a diverging effective path for the leakage flow entering the slip joint. The method also includes providing a new inner surface and new bottom edge, the new inner surface and the new bottom edge being reshaped to decrease the size of the recirculation zone. A jet pump is also provided.
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