Q75 — Containment Fire Response 2FP147
G2.4.25 Knowledge of fire protection procedures (3.3)
Given:
• Unit 2 is operating at 100 % Power.
• OHA A-7, FIRE PROT FIRE, annunciates.
• Panel 2RP5 is checked and indicates a Fire in Containment.
ˆ Zone 59 — Air and Water Deluge, Containment El. 100 Panel 335 is lit.
ˆ Zone 74 — Smoke and Fire Detector, Containment El. 100 Panel 335 is lit.
• The crew enters S2.OP-AB.FIRE-0001, Control Room Fire Response.
• The crew Trips the Reactor, Turbine, and all RCPs.
• 2-EOP-TRIP-1 is entered while continuing with S2.OP-AB.FIRE-0001, Control Room Fire Response.
Which ONE of the following describes the NEXT required action for the above conditions in accordance with S2.OP-AB.FIRE-0001?
• Unit 2 is operating at 100 % Power.
• OHA A-7, FIRE PROT FIRE, annunciates.
• Panel 2RP5 is checked and indicates a Fire in Containment.
ˆ Zone 59 — Air and Water Deluge, Containment El. 100 Panel 335 is lit.
ˆ Zone 74 — Smoke and Fire Detector, Containment El. 100 Panel 335 is lit.
• The crew enters S2.OP-AB.FIRE-0001, Control Room Fire Response.
• The crew Trips the Reactor, Turbine, and all RCPs.
• 2-EOP-TRIP-1 is entered while continuing with S2.OP-AB.FIRE-0001, Control Room Fire Response.
Which ONE of the following describes the NEXT required action for the above conditions in accordance with S2.OP-AB.FIRE-0001?
A. OPEN the 2FP147 from the control room
B. Dispatch an NEO to OPEN the associated deluge valves.
C. Dispatch an NEO to place both PORV BLOCK Valve breaker key switches in EMER CLOSE.
D. Verify OHA A-15, FIRE PUMP 1/2 RUN, is in alarm indicating that a Diesel Fire Pump has started and is supplying fire protection water to the associated deluge valves in containment.
▶ Show Answer & Explanation
✓ A. Correct. IAW S2.OP-AB.FIRE-0001, Control Room Fire Response, after the fire in containment has been recognized based on 2RP5 indications, the Reactor, Turbine, and all RCPs are tripped. The 2FP147 is then required to be opened from the control room. It does not receive an automatic signal to open.
✗ B. Plausible because the candidate may believe that the associated deluge valves require manual operation. Incorrect as the deluge valves are automatic and in containment.
✗ C. Plausible because the candidate may believe that the spurious operation of the PORVs is possible from a containment fire. Plausible but incorrect because this is the action taken for a fire in the relay room.
✗ D. Plausible because a Fire Pump start will be necessary to provide fire protection water to containment. Incorrect because the 2FP147 does not receive an automatic open signal and therefore the fire pumps would not have started. They will start once the 2FP147 is opened from the control room.
Ref: S2.OP-AB.FIRE-0001, Control Room Fire Response | LO: N/A | Source: Bank, Salem 2011 NRC Exam, Q74 | Cognitive: Fundamental
Connections
- Related systems: Fire Protection, Containment
- Related procedures: AB.FIRE-0001 — Control Room Fire Response
- Related EOPs: EOP-TRIP-1 — Reactor Trip or Safety Injection
- Related exam: 2020 NRC Written Exam