Pressurized water nuclear reactor pressure control system and method of operating same

Patent · Tue Mar 01 00:00:00 EST 1988

OSTI ID:5056297

Kish, N W

In a pressure control system of a pressurized water nuclear reactor, containing a pressurizer, water sprayers and means for charging water to the water sprayers, heaters, power operated relief valves and safety relief valves, where in the valves each are connected to the pressurizer through a conduit forming a loop seal upstream from each valve for accumulation of a water seal for the valve seat thereof, and the valves discharge through a line to a pressurizer relief tank, the improvement is described comprising: means for charging water to the loop seals; means for sensing a variation in temperature in the loop seals resulting from the discharge of the water seal therefrom and passage of steam therethrough, or formation of water seal replacing steam, therein; and means responsive to the means for sensing a variation in temperature to activate the means for charging water to charge water at least one of the loop seals upon rise in temperature therein, and deactivate the means for charging water thereto upon a drop in temperature therein.

• Assignee: Westinghouse Electric Corp., Pittsburgh, PA
• Patent Number(s): US 4728486
• Application Number: TRN: 88-018829
• OSTI ID: 5056297
• Resource Relation: Patent File Date: Filed date 14 Aug 1985
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
PWR TYPE REACTORS
PRESSURE CONTROL
REACTOR CONTROL SYSTEMS
DESIGN
HEATERS
PRESSURIZING
REACTOR OPERATION
RELIEF VALVES
SEALS
SPRAYS
STEAM
WATER
CONTROL
CONTROL EQUIPMENT
CONTROL SYSTEMS
EQUIPMENT
FLOW REGULATORS
HYDROGEN COMPOUNDS
OPERATION
OXYGEN COMPOUNDS
REACTORS
VALVES
WATER COOLED REACTORS
WATER MODERATED REACTORS
210200* - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled