AB.TRB-0001 — Main Turbine Abnormality
Purpose
Provides guidance for responding to a turbine trip below P-9 (approximately 50% reactor power), including concurrent procedure actions and plant stabilization.
Key Actions / Information
Exam — 2019 Q92
Per AB.COND-0001 CAS: when condenser backpressure exceeds the Attachment 4 limit and reactor power is below P-9, the crew trips the Turbine (not the Reactor) and performs AB.COND-0001 concurrently with AB.TRB-0001 (Turbine Trip Below P-9). Above P-9, the crew would trip the Reactor and transition to EOP-TRIP-1 — AB.TRB-0001 would NOT be entered.
Connections
- Related systems: Main Turbine
- Related procedures: AB.COND-0001 — Loss of Condenser Vacuum
- Related exam questions: 2019 Q92
- Related exam: 2019 NRC Written Exam, 2023 NRC Operating Exam