Full range nuclear power plant steam generator level control system
Patent
·
OSTI ID:5051729
In a method of controlling feedwater level in a steam generator of a pressurized water reactor nuclear power plant, the steam generator having secondary loop feedwater lines. The method is described including the steps of outputting a first signal from a first three-mode controller to control feedwater flow through the secondary loop feedwater lines at reactor power levels below a predetermined percentage, and outputting a second signal from a second three-mode controller to control feedwater flow through the secondary loop feedwater lines at reactor power levels above the predetermined percentage. The improvement in combination therewith comprises: receiving the first and second signals at a transition controller means; generating a first feedwater temperature-dependent function; operating on the first input signal with the first temperature dependent function to produce a third signal; generating a second feedwater temperature-dependent function; operating on the second input signal with the second temperature-dependent function to produce a fourth signal; and adding the third and fourth signals resulting from the operating steps to control the feedwater flow through the secondary loop feedwater lines throughout an entire range of reactor load.
- Assignee:
- Westinghouse Electric Corp., Pittsburgh, PA
- Patent Number(s):
- US 4728481
- OSTI ID:
- 5051729
- Country of Publication:
- United States
- Language:
- English
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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
220400* -- Nuclear Reactor Technology-- Control Systems
BOILERS
CONTROL SYSTEMS
DESIGN
ELECTRONIC CIRCUITS
FEEDWATER
HYDROGEN COMPOUNDS
LEVELS
OPERATION
OXYGEN COMPOUNDS
PULSE CIRCUITS
PWR TYPE REACTORS
REACTOR CONTROL SYSTEMS
REACTORS
SIGNAL CONDITIONERS
STEAM GENERATORS
TEMPERATURE DEPENDENCE
VAPOR GENERATORS
WATER
WATER COOLED REACTORS
WATER MODERATED REACTORS
210200 -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
22 GENERAL STUDIES OF NUCLEAR REACTORS
220400* -- Nuclear Reactor Technology-- Control Systems
BOILERS
CONTROL SYSTEMS
DESIGN
ELECTRONIC CIRCUITS
FEEDWATER
HYDROGEN COMPOUNDS
LEVELS
OPERATION
OXYGEN COMPOUNDS
PULSE CIRCUITS
PWR TYPE REACTORS
REACTOR CONTROL SYSTEMS
REACTORS
SIGNAL CONDITIONERS
STEAM GENERATORS
TEMPERATURE DEPENDENCE
VAPOR GENERATORS
WATER
WATER COOLED REACTORS
WATER MODERATED REACTORS