Signal validation using simultaneous consistency checking of multivariable measurements

Conference · Fri Jan 01 04:00:00 EST 1988 · Transactions of the American Nuclear Society; (USA)

OSTI ID:5655232

Gloeckler, O; Morgenstern, V M; Upadhyaya, B R

Since the incident at Three Mile Island Unit 2, computerized plant status display, human factors in control room design, and other plant monitoring tools available to plant personnel have seen a tremendous growth. One such proposed operator aid is a plant signal validation system. The objectives of the multivariable signal consistency checking are (a) to separate sensor faults (bias, decalibration) from normal changes in the multivariable system and (b) to detect and isolate common-mode sensor failures. The generalized consistency checking of multivariate redundant measurements (GCCM) network logic has several levels. The GCCM is being tested using both a simulated and an operational pressurized water reactor data base. A case in point occurs when a majority of the direct redundant measurements of several process variables have failed simultaneously by a common node. The numerical experiments showed that such multivariable common-mode failures can be detected by the GCCM approach. Also, a systematic and detailed sensitivity test is needed to improve the reliability of the method.

• OSTI ID: 5655232
• Report Number(s): CONF-881011--
• Conference Information: Journal Name: Transactions of the American Nuclear Society; (USA) Journal Volume: 57
• Country of Publication: United States
• Language: English

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