Load control system for nuclear power plant
A load control system for a boiling water reactor power plant. A recirculating pump speed demand signal and a total steam flow demand signal are derived on the basis of combination of a first control signal produced in accordance with a power difference signal representative of difference between an actual value of an output power of an electric generator and a set value for the generator output and a second control signal produced in accordance with a pressure difference signal representative of difference between an actually measured value of the reactor pressure and a set value therefor. Speed of a recirculating pump is controlled in dependence on the recirculating pump speed demand signal, while opening degrees of a governor valve and a bypass valve of a turbine are controlled in accordance with the total steam flow demand signal. The recirculating pump speed demand signal and the total steam flow demand signal are derived by combining the first or the second control signal which has been regulated through gain elements. Further, the power difference signal is added to the pressure difference signal for modifying the set point for the reactor pressure.
- Assignee:
- Hitachi, Ltd. (Japan)
- Patent Number(s):
- US 4472345
- OSTI ID:
- 6129394
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
210100 -- Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
22 GENERAL STUDIES OF NUCLEAR REACTORS
220400* -- Nuclear Reactor Technology-- Control Systems
BWR TYPE REACTORS
CIRCULATING SYSTEMS
CONTROL
CONTROL SYSTEMS
DYNAMIC LOADS
ELECTRIC GENERATORS
POWER FACTOR
PRESSURE CONTROL
PUMPS
REACTORS
SIGNALS
VELOCITY
WATER COOLED REACTORS
WATER MODERATED REACTORS