Automatic steam generator feedwater control over full power range

Patent · Tue Oct 11 04:00:00 EDT 1988

OSTI ID:6798087

Singh, G; French, C T

This patent describes a pressurized water nuclear reactor stream supply system having a recirculation type steam generator including a variable speed feedwater pump, a main feedwater valve and a bypass feedwater valve, a method for controlling the water level in the steam generator comprising: measuring the steam flow out of the steam generator and generating a steam flow signal commensurate with the steam flow; measuring the feedwater flow into the steam generator and generating a feedwater flow signal commensurate with the feedwater flow; measuring the water level in the steam generator and generating a water level signal commensurate with the water level; measuring the reactor power and generating a power signal commensurate with the reactor power; passing the water level signal through a first adaptive network, wherein the control coefficients in the first network have a functional form dependent on the power signal, the output of the first network representing a dynamically compensated level signal; comprising the steam flow signal with the feedwater flow signal and passing the difference through a first proportional/integral circuit to generate a compensated flow error signal.

• Assignee: Combustion Engineering, Inc., Windsor, CT
• Patent Number(s): US 4777009
• OSTI ID: 6798087
• 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
BOILERS
CIRCULATING SYSTEMS
CONTROL EQUIPMENT
CONTROL SYSTEMS
ENERGY SYSTEMS
EQUIPMENT
FEEDWATER
FLOW REGULATORS
HYDROGEN COMPOUNDS
OXYGEN COMPOUNDS
PUMPS
PWR TYPE REACTORS
REACTORS
STEAM GENERATORS
STEAM SYSTEMS
VALVES
VAPOR GENERATORS
WATER
WATER COOLED REACTORS
WATER MODERATED REACTORS