Life assessment methodology for turbogenerator rotors: Volume 1, Improvements to the SAFER (Stress and Fracture Evaluation of Rotors) code rotor lifetime prediction software: Final report
The original SAFER (Stress and Fracture Evaluation of Rotors) code was developed by EPRI between 1976 and 1980 in response to concerns for turbo-generator rotor burst in the wake of the TVA Gallatin IP/LP rotor incident. The industry's response to the Gallatin burst was to inspect and retire any rotor which was suspected to have low creep ductility (especially Grade C 1CrMoV forgings) or a high ..delta..FATT (resulting from temper embrittlement during elevated temperature service) and, of course, which exhibited bore ultrasonic indications which by their density or distribution posed the threat of harboring or initiating cracks near the critical size. The conservatism inherent in these recommendations for retirement certainly removed many potentially dangerous rotors from service, but just as certainly led to the unnecessary retirement of many rotors which had not suffered any significant damage during their service history. The emphasis in the utility industry on extending the useful life of plant components, at the same time when fossil plants were being relegated to peaking duty and thus subjecting many turbines to much increased cyclic loading, resulted in critical examination of the economic basis of run/retire decisions and a need to understand the degree of risk involved in continued operation. This report discusses that examination and the improvements to the SAFER code as a result of that examination. 41 refs., 49 figs., 7 tabs.
- Research Organization:
- Jones (J.A.) Applied Research Co., Charlotte, NC (USA)
- OSTI ID:
- 5360438
- Report Number(s):
- EPRI-CS/EL-5593-Vol.1; ON: TI88920239
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
200104* -- Fossil-Fueled Power Plants-- Components
42 ENGINEERING
420500 -- Engineering-- Materials Testing
A CODES
ACOUSTIC TESTING
ALLOYS
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
COMPUTER CALCULATIONS
COMPUTER CODES
CRACK PROPAGATION
CRACKS
CREEP
DATA COVARIANCES
DOCUMENT TYPES
DUCTILITY
ELECTRIC UTILITIES
ENERGY TRANSFER
FATIGUE
FINITE ELEMENT METHOD
FOSSIL-FUEL POWER PLANTS
FRACTURE MECHANICS
HEAT TRANSFER
INSPECTION
IRON ALLOYS
IRON BASE ALLOYS
MACHINERY
MAINTENANCE
MATERIALS TESTING
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MECHANICS
NONDESTRUCTIVE ANALYSIS
NONDESTRUCTIVE TESTING
NUMERICAL SOLUTION
PARAMETRIC ANALYSIS
POWER PLANTS
PROBABILITY
PROGRESS REPORT
PUBLIC UTILITIES
RISK ASSESSMENT
ROTORS
S CODES
SERVICE LIFE
STEELS
STRESS ANALYSIS
TEMPERATURE DISTRIBUTION
TEMPERATURE EFFECTS
TENSILE PROPERTIES
TESTING
THERMAL POWER PLANTS
TURBINES
TURBOMACHINERY
ULTRASONIC TESTING