At 1926 EDT on 8/16/2012, Unit 2 reactor automatically tripped on single loop loss of flow, following #4 RCP trip. Cause of RCP trip is under investigation.
Following the reactor trip, all safety related equipment operated as designed. Auxiliary feedwater actuated as expected on loss of the operating main feedwater pumps.
Unit 2 is currently being maintained in Mode 3 at NOP/NOT [normal operating pressure/normal operating temperature], with auxiliary feedwater supplying the steam generator.
Method of decay heat removal is via steam dumps to condenser. Current RCS conditions: Temp = 547 degrees F and stable, Pressure = 2235 psig and stable. No indication of any primary/secondary leakage. All rods are inserted. Electrical alignment is normal, supplied from offsite power. No impact to Unit 1: Unit 1 is operating at 100% power / Mode 1.