RELIABILITY OF STEAM TURBINE ROTORS - TASK 1: LIFETIME PREDICTION ANALYSIS SYSTEM.

Task 1 of RP 502, ″Reliability of Steam Turbine Rotors,″ resulted in the development if a computerized lifetime prediction analysis system (STRAP) for the automatic evaluation of rotor integrity based upon the results of a boresonic examination of near-bore defects. Concurrently an advanced boresonic examination system (TREES), designed to acquire data automatically for lifetime analysis, was developed and delivered to the maintenance shop of a major utility. This system and a semi-automated, state-of-the-art system (BUCS) were evaluated on two retired rotors as part of the Task 2 effort. A modified nonproprietary version of STRAP, called SAFER, is now available for rotor lifetime prediction analysis.