Control system for a boiling-water nuclear power plant
A control system for a nuclear power plant which comprises a boiling-water reactor and a steam line including a control valve therein connecting the steam outlet from the reactor to a steam turbine includes a first controller of the ''I-action'' type responsive to the reactor pressure and a second controller of either the ''P-action'' or ''PD-action'' type responsive to the pressure in the steam line immediately in advance of the control valve. A summing device is provided for adding the output signals from the two controllers, and the output from the summing device is applied to the control valve for regulating its operation. For a system wherein a pair of steam lines each including a control valve therein are connected in parallel from the reactor steam outlet to the turbine, transducers are provided for measuring the respective pressures in the steam lines and a second summing device is connected to the outputs from the transducers for determining the mean value of the respective pressures in the steam lines. The output of the second summing device is then connected to the input of the second controller.
- Assignee:
- BBC Brown Boveri and Co. Ltd.
- Patent Number(s):
- US 4096030
- OSTI ID:
- 6982453
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
210100* -- Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
BWR TYPE REACTORS
CONTROL EQUIPMENT
CONTROL SYSTEMS
DESIGN
EQUIPMENT
FLOW REGULATORS
PRESSURE REGULATORS
REACTORS
STEAM SYSTEMS
STEAM TURBINES
TURBINES
TURBOMACHINERY
VALVES
WATER COOLED REACTORS
WATER MODERATED REACTORS