Passive integral isolation valve
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United States of America Patent
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Jun 2, 2020
Grant Date -
Jun 23, 2016
app pub date -
Oct 7, 2015
filing date -
Oct 7, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A valve assembly includes a flange connected to a vessel penetration of a reactor pressure vessel of a nuclear reactor. A valve is disposed inside the flange or protrudes from the flange into the vessel penetration. The valve includes a valve seat and a movable valve member positioned so that pressure inside the reactor pressure vessel urges the movable valve member against the valve seat to close the valve. The valve assembly further includes a plenum having an inlet via which the plenum can be pressurized to apply pressure to the movable valve member that urges the movable valve member away from the valve seat to open the valve. The plenum may be defined in part by a surface of the movable valve member. The valve assembly preferably does not include a valve actuator.
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