Title: System for operating a boiling water reactor steam turbine plant with a combined digital computer and analog control

Abstract: A combined digital computer/analog control system for operating a boiling water reactor steam turbine power plant, wherein the digital computer provides a throttle pressure setpoint, speed error and load demand for controlling the plant depending upon the operational states of the system, is disclosed. The analog portion of the system also controls the plant in cooperation with the digital computer for certain operational states and conditions when the digital computer is in operation; and the analog system alone controls the plant when the digital computer is out of service. The transfer between such control is effected depending upon the operational states of the system and certain of the components therein. The system also includes in the digital computer portion, the provision for preventing a load demand which is outside the limits of the reactor circulation system when the reactor is in a state of automatic operation.

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Inventors: Berkebile, Gary W. (Pittsburgh, PA, US)
Lardi, Francesco (Pittsburgh, PA, US)
Podolsky, Leaman B. (Wilmington, DE, US)

Application Number: 415869
Filing Date: 1973-11-13
Publication_date: 1976-01-06
Assignee: Westinghouse Electric Corporation (Pittsburgh, PA)
Primary Class(es): 376/217 376/215, 376/241, 415/17, 700/67, 700/289, 976/DIG300
Other Classes:
US Patent Ref:

3552872	Jan, 1971	Giras et al.	415/17.
3572958	Mar, 1971	Jensen	415/17.
3588265	Jun, 1971	Berry	235/151.
3630839	Dec, 1971	Podolsky	176/24.
3709626	Jan, 1973	Eggenberger	415/17.

Other Refs:
Primary Examiner: Ruggiero, Joseph F.
Assistant Examiner:
Attorney: Patterson; H. W.