Method for controlling steam generators

Details Method for controlling steam generators Method for controlling steam generators

2005-05-03

2005-05-03

Wilson, Gregory A. (Department: 3749)

Liquid heaters and vaporizers

Feeders

Automatic

C122S459000, C122S45100R

Reexamination Certificate

active

06886502

ABSTRACT:
A method of controlling the feedwater flow to the secondary side of a steam generator in a pressurized water nuclear reactor monitors various process variables such as the feedwater and the steam flows and pressures around the secondary side of the steam generator and then generates process signals based upon the process variables. An error signal based upon selected process signals is generated. The error signal is filtered by a deadband filter network for generating a control signal with a deadband. The control signal with a deadband is sent to a proportional-integral controller for generating a demand signal. The demand signal is then sent to an operator such as feedwater valve positioner or a feedwater pump speed controller for controlling the feedwater flow into the steam generator.

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