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U.S. Department of Energy
Office of Scientific and Technical Information

Guidelines for evaluation of generator retaining rings

Technical Report ·
OSTI ID:6800444
The generic guidelines for evaluation of generator retaining ring contain comprehensive information concerning inspection and evaluation of retaining rings. The majority of generators currently in service utilize retaining ring material which, when exposed to moist environments, is susceptible to stress corrosion. The guide describes the associated fracture mechanics and materials parameters applicable to magnetic and nonmagnetic rings. Based on a worldwide survey of inspection methods employed to detect stress corrosion cracks, the available nondestructive examination - visual, liquid penetrant, eddy-current, magnetic particle and ultrasonic inspections - are discussed to provide the reader an independent basis for selection of his own plan of action. The guidelines for performing the ring inspection include suggestion on planning and conducting successful inspection. 16 refs., 18 figs.
Research Organization:
Electric Power Research Inst., Palo Alto, CA (USA)
OSTI ID:
6800444
Report Number(s):
EPRI-EL/EM-5117-SR; ON: TI87920391
Country of Publication:
United States
Language:
English