I should have added that there are some who are suggesting that the elevated temperature spikes experienced during startup may have caused damage to the turbine resulting in the reduction of turbine efficiency.
During startup following a major outage (turbine, boiler controls), final steam temps to turbine inlet reached 1160 degrees(Rated 1000).This peak lasted less than 20 minutes. Over the course of 4 days of startup/tuning similar spikes were encountered but max temps reached were below 1160. What...