Instrument thimble tube shroud
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United States of America Patent
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-
Jun 1, 1993
Grant Date -
N/A
app pub date -
Sep 10, 1991
filing date -
Sep 10, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An instrument thimble tube shroud is disclosed which has a central cup surrounding an instrument thimble tube to prevent fluid flow about the thimble tube from causing excessive vibration and wear. A plurality of arms extend radially from the cup and have locking pads disposed at the end of each arm, springs extending from the pads engaging recesses in an adjacent fuel assembly nozzle to lock the shroud in position and prevent movement of the shroud or rotation due to aggressive fluid flow. Utilizing the inventive shroud prevents vibration and damage to the instrument thimble tube passing therethrough, enhancing life of the instrumentation and allowing continued observation of dynamics within a nuclear reactor.
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