Emergency feedwater system for steam generators of a nuclear power plant

Patent · Mon Mar 30 23:00:00 EST 1987

OSTI ID:6557808

Schlonski, J S

This patent describes an emergency feedwater system for the steam generators of a pressurized water nuclear reactor power plant adapted to supply emergency feedwater from a storage tank. The system has pumps provided to direct emergency feedwater to at least one steam generator, when water from a main feedwater system, which feeds through an inlet line containing a check valve and terminating at a feedwater nozzle to a steam generator, is not available, so as to remove heat from the reactor. The improvement described here comprises two separately located subsystems, each subsystem adapted for supplying emergency feedwater to at least one stream generator, each subsystem comprising: (a) an emergency feedwater supply tank; (b) a pair of emergency feedwater lines for discharge of water from the tank, the feedwater lines communicating with the inlet line to a steam generator between the check valve and feedwater nozzle; (c) an electrically operated motor driven pump in one of the pair of emergency feedwater lines having an electrical power source for activation thereof; (d) a steam driven pump in the other of the pair of emergency feedwater lines having means for providing steam from a steam generator, to which the other feedwater line leads, to the pump, and a normally closed valve means associated therewith; and (e) a cavitating venturi in the emergency feedwater line at a location following the pump and prior to communicating of the feedwater line with the inlet line.

• Assignee: Westinghouse Electric Corp., Pittsburgh, PA
• Patent Number(s): US 4654190
• OSTI ID: 6557808
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210200 -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
22 GENERAL STUDIES OF NUCLEAR REACTORS
220900* -- Nuclear Reactor Technology-- Reactor Safety
AFTER-HEAT REMOVAL
BOILERS
CONTAINERS
CONTROL EQUIPMENT
ECCS
ELECTRIC MOTORS
ENERGY TRANSFER
ENGINEERED SAFETY SYSTEMS
EQUIPMENT
FEEDWATER
FLOW REGULATORS
HEAT TRANSFER
HYDROGEN COMPOUNDS
INTAKE STRUCTURES
MECHANICAL STRUCTURES
MOTORS
NOZZLES
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
OXYGEN COMPOUNDS
POWER PLANTS
PUMPS
PWR TYPE REACTORS
REACTOR PROTECTION SYSTEMS
REACTORS
REMOVAL
STEAM
STEAM GENERATORS
STORAGE FACILITIES
TANKS
THERMAL POWER PLANTS
VALVES
VAPOR GENERATORS
VENTURI TUBES
WATER
WATER COOLED REACTORS
WATER MODERATED REACTORS