Abstract: A plurality of sensors are disposed equally about a blade row in a turbine with each sensor being operable to provide an output signal in response to a passing blade. A blade is selected for monitoring purposes by designating its degree location relative to a reference position .+-. some angular distance constituting a small window. As the selected blade passes a sensor, its output signal, properly conditioned to form a pulse, is gated during the time period corresponding to the window. The sequential pulses of the sensors form a pulse train which is modulated by any blade vibration. An FM detector is provided for demodulating the pulse train to derive vibration information.

Abstract: An electronic system for operating a nuclear steam turbine power plant including a cycle steam reheater controller to control the heat transfer operation in a cycle steam reheater according to the steam and metal temperatures measured in one or more low pressure turbine sections, is disclosed. The steam and metal temperatures are closed-loop controlled as a function of the low pressure turbine design operational limitations. The reheater controller controls dual reheaters, each employing one or more heating sections which reheat cycle steam flowing therethrough to one or more low pressure turbine sections with split side entry steam inlet ports.