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our system configuration is such that we need to run 2 main CW pumps all the time when steam turbine is in operation with two HRSG's. when steam turbine is at 200 mw load suppose if both main CW pumps tripped due to some or some other reason and there is no cooling water supply to the condenser, i know that condenser protection will be acted and steam turbine trips.
my question is when steam turbine is in operation. if there is no cooling water supply to condenser, then vacuum drops very fast and possibility of condenser tube damage. as the steam turbine got tripped on condenser protection but again all the bypass is dumped to condenser how it can take this load?
does steam turbine trip on condenser protection activates the diverter damper to trip or not?
if steam turbine not trip acted what is the operator action required?
GT and ST are GE make GT 9fa and ST D11
my question is when steam turbine is in operation. if there is no cooling water supply to condenser, then vacuum drops very fast and possibility of condenser tube damage. as the steam turbine got tripped on condenser protection but again all the bypass is dumped to condenser how it can take this load?
does steam turbine trip on condenser protection activates the diverter damper to trip or not?
if steam turbine not trip acted what is the operator action required?
GT and ST are GE make GT 9fa and ST D11