Q24 — Containment Flooding / SW Not Isolated by Phase A/B
W E15 EK2.03 (3.3)
Given:
• Unit 1 LOCA
• Containment pressure peaked 20 psig now 13 psig lowering
• Successful cold leg recirc transfer
• Entered EOP-FRCE-2 for high containment water level
Which system is the source of water into containment that is NOT isolated by Phase A or B?
• Unit 1 LOCA
• Containment pressure peaked 20 psig now 13 psig lowering
• Successful cold leg recirc transfer
• Entered EOP-FRCE-2 for high containment water level
Which system is the source of water into containment that is NOT isolated by Phase A or B?
A. Fire Protection
B. Service Water
C. Component Cooling Water
D. Primary Water
▶ Show Answer & Explanation
✓ B. Correct. Service Water from CFCUs does NOT get isolated by Phase A or B signals. Therefore SW is the only source of water into containment following Phase A and B actuation that could contribute to containment flooding.
✗ A. Fire Protection is isolated on Phase A signal.
✗ C. CCW is isolated on Phase B signal (containment pressure exceeded 15 psig).
✗ D. Primary Water is isolated on Phase A signal.
Ref: 1-EOP-FRCE-2 (R41) | LO: NOS05FRCE00-08, Obj 1.2 | Source: Bank - Salem | Cognitive: Fundamental/Memory
Connections
- Related systems: Service Water, Containment
- Related procedures: EOP-FRCE-2 — Response to Containment Flooding
- Related exam: 2023 NRC Written Exam