Hello my dear colleagues!
We have a GE Turbine Machine LM6000 PF Plus since 2019. Unfortunately, we had a strange event that broke all the blades on HPC from 3rd stage to 14th stage. Here is some review of the event.
01 Nov. CT was online with 48 MW in normal conditions.
02 Nov. CT starts to decrease load from 48MW to 45MW, the operator check parameter and notice that the CT increase automatically the load, but the vibrations starts to increase a little bit without activate alarm limits. in the afternoon, the field operator sees in the exhaust a lot of fire after an explosion, but the turbine still Online but this time with 38 MW. Finally, after the explosion and 1 minute without alarms, it was activated the turbine trip condition.
An borescope inspection shows a completely destruction in all the baldes but the thing is that the control didn't show any kind of alarm and it was working 100% operational.
27800EOH
Aero derivate Turbine.
I need your kindly help with ideas for a first RCA. I supposed that the LPC stage lose some a particle from the blade and destroyed everything or maybe a huge stall event occurs or maybe bleed valve deficiency, but it was a suppose.
Thank you for your comments.
We have a GE Turbine Machine LM6000 PF Plus since 2019. Unfortunately, we had a strange event that broke all the blades on HPC from 3rd stage to 14th stage. Here is some review of the event.
01 Nov. CT was online with 48 MW in normal conditions.
02 Nov. CT starts to decrease load from 48MW to 45MW, the operator check parameter and notice that the CT increase automatically the load, but the vibrations starts to increase a little bit without activate alarm limits. in the afternoon, the field operator sees in the exhaust a lot of fire after an explosion, but the turbine still Online but this time with 38 MW. Finally, after the explosion and 1 minute without alarms, it was activated the turbine trip condition.
An borescope inspection shows a completely destruction in all the baldes but the thing is that the control didn't show any kind of alarm and it was working 100% operational.
27800EOH
Aero derivate Turbine.
I need your kindly help with ideas for a first RCA. I supposed that the LPC stage lose some a particle from the blade and destroyed everything or maybe a huge stall event occurs or maybe bleed valve deficiency, but it was a suppose.
Thank you for your comments.