Sensor failure detection and estimation
In a large dynamic system, such as a commercial nuclear plant, process signals are used for plant control; safety systems; monitoring devices, such as the safety parameter display system and the Technical Support Center; postaccident diagnostics; event prediction; and transient recovery. It is necessary to address the problem of signal validation and sensor verification to improve the reliability of such systems. Several sensor failure detection and estimation methods are outlined, including analytical redundancy, generalized likelihood ratio approach, parity-space representation, data-driven representation, and verification by using correlation from independent instruments. Two of the applications are related to the loss-of-fluid test reactor, and this illustrates the flexibility of implementing failure detection methods in a well-instrumented facility. In this context, the aspects of sensor location, measurement models, and reactor subsystem description are discussed.
- Research Organization:
- Univ. of Tennessee, Knoxville
- OSTI ID:
- 5042018
- Journal Information:
- Nucl. Saf.; (United States), Journal Name: Nucl. Saf.; (United States) Vol. 26:1; ISSN NUSAA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
220400* -- Nuclear Reactor Technology-- Control Systems
CONTROL SYSTEMS
DETECTION
ENGINEERED SAFETY SYSTEMS
FAILURES
LOFT REACTOR
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
POWER PLANTS
PRESSURIZERS
PWR TYPE REACTORS
REACTOR CONTROL SYSTEMS
REACTOR INSTRUMENTATION
REACTOR MONITORING SYSTEMS
REACTORS
RELIABILITY
RESEARCH AND TEST REACTORS
TANK TYPE REACTORS
TEST REACTORS
THERMAL POWER PLANTS
WATER COOLED REACTORS
WATER MODERATED REACTORS