SHUT-OFF DEVICE FOR A NUCLEAR REACTOR FLUID DUCT, IN PARTICULAR FOR A STEAM GENERATOR BOTTOM DRAIN
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United States of America Patent
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Issued Date -
May 2, 2013
app pub date -
Mar 18, 2011
filing date -
Mar 18, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A shut-off device for a nuclear reactor component duct is provided that includes a plurality of elastic sealing rings, each radially expandable with respect to a common longitudinal axis between a retracted position at a distance from a wall of the duct and an expanded position for leaktight contact with the wall of the duct; a device provided for selectively moving the sealing rings between their retracted positions and their expanded positions; at least one member for locking in position the shut-off device in the duct to be shut off, distinct from the sealing rings, radially expandable with respect to the central axis between a retracted position in which the locking member is moved away from the wall of the duct and a locking position in which the locking member bears against the wall of the duct; a device provided for selectively moving the locking member between its retracted position and its locking position.
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