Passive depressurization system

Patent · Tue May 12 04:00:00 EDT 1987

OSTI ID:6523547

Magee, R D; Asztalos, M J; Trinh, V D

This patent describes a pressurized water reactor having at least one reactor coolant system loop and a pressurizer hydraulically connected to at least one loop. The pressurizer has a top portion to accommodate steam and a spray nozzle in the top portion. A cold shutdown passive depressurization system comprises: a condenser unit; input port means for receiving steam from the top portion of the pressurizer; first means for conveying steam from the input port means to the condenser unit, the first means having at least one first valve therein which is closed except during cold shutdown; second means for receiving liquid condensed by the condenser unit, the second means having at least one second valve therein which is closed except during cold shutdown,; and output port means connected to the second means for returning condensed liquid to the nozzle within the pressurizer in order to provide a cooling spray that condenses steam in the top portion of the pressurizer.

• Assignee: Westinghouse Electric Corp., Pittsburgh, PA
• Patent Number(s): US 4664877
• OSTI ID: 6523547
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200* -- Nuclear Reactor Technology-- Components & Accessories
CONDENSERS
CONTROL EQUIPMENT
COOLING SYSTEMS
DEPRESSURIZATION SYSTEMS
DESIGN
ENERGY SYSTEMS
EQUIPMENT
FLOW REGULATORS
FLUID MECHANICS
HYDRAULICS
MECHANICS
NOZZLES
OPERATION
PRESSURIZERS
PWR TYPE REACTORS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTORS
SPRAYS
STEAM
VALVES
VAPOR CONDENSATION
WATER COOLED REACTORS
WATER MODERATED REACTORS