A
Dear colleagues,
We have a gas turbine GE MS7001FA DNL 2.0, 140 MW and we operate with gas or liquid fuel. In this turbine happen the following event:
Operators listened as a leakage. Ten seconds later (approximately), operators listened an explosion in turbine compartment that threw out the first and second level doors.
Immediately, during the visual inspection the operators looked the secondary flexible hose of the combustion chamber # 9 teared from flange of this chamber. In addition, this hose was burned, melted and drilled in a wide section near the side of the secondary manifold. And in the combustion chamber 8, evidence of a burn between the connecting flange and the gasket of the tertiary was found.
The event occurred at the time the unit was working with gas and transferring from Lean-Lean mode to Premix mode (Premix transfer mode), and the unit had a load of 80MW and rising to 90MW. In addition, we are using the atomization compressor instead the purge compressor due to the unavailability of this.
The other secondary hoses were not damaged.
We have photos available for sharing if it is necessary.
Any idea about the possible cause of this event?
Thank you very much.
We have a gas turbine GE MS7001FA DNL 2.0, 140 MW and we operate with gas or liquid fuel. In this turbine happen the following event:
Operators listened as a leakage. Ten seconds later (approximately), operators listened an explosion in turbine compartment that threw out the first and second level doors.
Immediately, during the visual inspection the operators looked the secondary flexible hose of the combustion chamber # 9 teared from flange of this chamber. In addition, this hose was burned, melted and drilled in a wide section near the side of the secondary manifold. And in the combustion chamber 8, evidence of a burn between the connecting flange and the gasket of the tertiary was found.
The event occurred at the time the unit was working with gas and transferring from Lean-Lean mode to Premix mode (Premix transfer mode), and the unit had a load of 80MW and rising to 90MW. In addition, we are using the atomization compressor instead the purge compressor due to the unavailability of this.
The other secondary hoses were not damaged.
We have photos available for sharing if it is necessary.
Any idea about the possible cause of this event?
Thank you very much.