Full range nuclear power plant steam generator level control system

Patent · Tue Mar 01 00:00:00 EST 1988

OSTI ID:5051729

Geets, J M

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
• Application Number: TRN: 88-018892
• OSTI ID: 5051729
• Resource Relation: Patent File Date: Filed date 19 Nov 1986
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
REACTOR CONTROL SYSTEMS
DESIGN
STEAM GENERATORS
LEVELS
FEEDWATER
OPERATION
PWR TYPE REACTORS
SIGNAL CONDITIONERS
TEMPERATURE DEPENDENCE
BOILERS
CONTROL SYSTEMS
ELECTRONIC CIRCUITS
HYDROGEN COMPOUNDS
OXYGEN COMPOUNDS
PULSE CIRCUITS
REACTORS
VAPOR GENERATORS
WATER
WATER COOLED REACTORS
WATER MODERATED REACTORS
220400* - Nuclear Reactor Technology- Control Systems
210200 - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled