AOP-12 "Loss of EY-10"

Question 1

AOP-12 entry conditions

Answer 1

• EK-0543 “Preferred AC Bus Number 1 Trouble”

- Channel “A” RPS Trip Ladder Logic lights illuminated

Question 2

AOP-12 automatic actions

Answer 2

• P-8A, Motor Driven Aux Feed Pump, control circuitry transfers to EY-30, Preferred AC Bus No 3.
• P-8B, Motor Driven Aux Feed Pump, control circuitry transfers to EY-30, Preferred AC Bus No 3.
• Main Feedwater control for E-50A, “A” S/G, transfers to EY-30, Preferred AC Bus No 3.

Question 3

AOP-12 reactor trip criteria

Answer 3

CV-0711, Feed Pump P-1A Recirculation Valve, fails open with reactor power > 80%

Question 4

AOP-12 immediate actions

Answer 4

NONE