Strain Gauging of Aratiatia Unit G3 Generator Rotor and Other Mpt Ndt Activities
نویسندگان
چکیده
The rotors at Aratiatia have historically experienced cracking during service. The strains on a cracked rotor have recently been measured using a UHF strain gauge telemetry system to determine the effects of operating conditions upon the stress levels, which are responsible for crack initiation and growth. The strains were monitored on the web and skirt of the rotor, during cold and warm starts, excitation and MVARS changes, changing power through the rough running range, and disruption of the vortex during synchronous conversion tests. Other NDT activities will also be discussed including MPT’s involvement with the QUEST FTIS and LOTIS tube inspection systems.
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