CAMS APM detected a ~10°F increase in the thrust bearing temperature of steam turbine #1 compared to the calculated estimate. In response, they adjusted the high-high alert to 230°F and set the upper bound slightly above the highest recorded reading of 224°F. With continued monitoring, a sudden increase in oil drain temperature was revealed, prompting an immediate notification to the site.
During a planned outage, the site replaced the thrust bearing. Although the root cause analysis (RCA) on the bearing has not been completed, there is a possibility that the issue could recur. CAMS APM retrained the model with the new thrust bearing to closely monitor any further changes.
CAMS APM has successfully retrained the model with the new thrust bearing and will continue to monitor for any deviations. The proactive detection and timely notification allowed the customer to address the thrust bearing failure before it could lead to more severe operational issues.