Westinghouse Electric Corporation

William W Wassel

David G Theriault

James A Neuner

Thomas J Kenny

Kingsley F Graham

Douglas A Bauman

John R Smith

Gilbert W Remley

Timothy F Thompson

Dhulipala M Rao

John A Skoncey

William P Gaussa

Ronald R Havelka

A circuit device for simulating a selected one of a plurality of process transducers, including: signal input and output terminals connectable to external conductors; a plurality of circuit components (90,92,94; 104,108) connectable between the signal input and output terminals; a coupling device (106) connected between two of the circuit components for conducting a signal between the two components; and selective connecting members including connector terminals connected to at least one of the circuit components (90,92,94; 104,108), and connector elements for establishing conductive connections between selected ones of the connector terminals for configuring the circuit device to apply to the signal output terminal a signal corresponding to the output signal of a selected transducer.

Process sensor simulators

Numerous signal conditioning circuits on a plurality of printed circuit boards are calibrated remotely by a signal processing unit which sends coded signals to each board, either sequentially or in parallel, to connect either on-board or off-board test signals to one of the conditioning circuits in place of its field generated input. The processing unit utilizes the actual and expected responses of each conditioning circuit to low and high test signals to generate a gain and an offset which are applied to the conditioned field signal to provide a calibrated signal. The time constant for each conditioning circuit is also measured periodically, or upon a selected temperature change, for use in generating a minimum waiting period for obtaining valid data following transfers between the field generated signals and the test signals.

Method and apparatus for auto-calibration of signal conditioning

A nuclear reactor flux mapping system having a plurality of neutron detectors operable to be driven into and out of a reactor core along any one of a number of pre-established paths. The detectors, corresponding drives (22) and drive controllers (28) are arranged into at least two physically separate and functionally independent channels. Each channel is respectively arranged to scan complementary paths through the core during normal system operation. At least two, redundant, functionally independent and physically separate 'command end of processing' channels (31 and 33) are provided. Each of the command and processing channels (30) are independently operable to automatically, programmably sequence the detector scans and process the detector output data on all of the detector channels while being electrically buffered from each detector channel through two-ported memories (36) in a manner to prevent faults on any of the channels from disabling any of the other system channels. Each detector channel is operable to scan the entire core in the event the other detector channel should prove inoperable.

Nuclear reactor in core flux mapping system

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Murrysville, PA, United States of America

William W Wassel