Detection and identification of failures in PWR pressurizer instrumentation using generalized likelihood ratios
Technical Report
·
OSTI ID:5499549
A method for detecting and identifying failures in the sensors of a pressurized water reactor (PWR) pressurizer is described and evaluated. The generalized likelihood ratio (GLR) technique is used to perform statistical tests on the innovations sequence of a Kalman filter state estimator. By this approach, one can determine when a failure occurs, identify the failed sensor, and estimate the failure magnitude. The GLR technique can also distinguish between instrument failures and sudden changes in the pressurizer dynamics. Simulation results and actual pressurizer data are used to demonstrate the capabilities of the GLR method.
- Research Organization:
- EG and G Idaho, Inc., Idaho Falls (USA)
- DOE Contract Number:
- AC07-76ID01570
- OSTI ID:
- 5499549
- Report Number(s):
- EGG-EE-5425; ON: TI85014381
- Country of Publication:
- United States
- Language:
- English
Similar Records
A generalized likelihood ratio approach to detecting and identifying failures in pressurizer instrumentation
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Journal Article
·
Sun Feb 28 23:00:00 EST 1982
· Nucl. Technol.; (United States)
·
OSTI ID:6768019
Bias identification in PWR pressurizer instrumentation using the generalized liklihood-ratio technique
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·
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·
OSTI ID:5236503
Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
DETECTION
ELECTRIC FILTERS
FAILURES
FILTERS
LOFT REACTOR
MONITORING
PRESSURIZERS
PWR TYPE REACTORS
REACTOR INSTRUMENTATION
REACTORS
RESEARCH AND TEST REACTORS
SIMULATION
TANK TYPE REACTORS
TEST REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
DETECTION
ELECTRIC FILTERS
FAILURES
FILTERS
LOFT REACTOR
MONITORING
PRESSURIZERS
PWR TYPE REACTORS
REACTOR INSTRUMENTATION
REACTORS
RESEARCH AND TEST REACTORS
SIMULATION
TANK TYPE REACTORS
TEST REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS