Q28 — RCP Standpipe Level Hi
003000A1.10 (2.5)
Given:
• Unit 2 is at 100% Power.
• Control Console Bezel Alarm for 21 RCP "STANDPIPE LEVEL HI" annunciates.
• The RO reports 21 RCP Seal Leak-off Flow recorder indication has LOWERED.
The "STANDPIPE LEVEL HI" alarm is an indication of excessive leakage from the RCP _(1)_.
• Unit 2 is at 100% Power.
• Control Console Bezel Alarm for 21 RCP "STANDPIPE LEVEL HI" annunciates.
• The RO reports 21 RCP Seal Leak-off Flow recorder indication has LOWERED.
The "STANDPIPE LEVEL HI" alarm is an indication of excessive leakage from the RCP _(1)_.
A. #3 seal.
B. #2 seal.
C. #2 and #3 seals.
D. #1 seal.
▶ Show Answer & Explanation
✓ B. Correct. Both a standpipe level high alarm and reduced #1 seal leak-off flow are indications of a #2 seal failure.
✗ A. Plausible because the candidate may confuse the implications of a high standpipe alarm with a low standpipe alarm. A standpipe level low alarm is an indication of a number 3 seal problem.
✗ C. Plausible because the candidate may remember that reduced #1 seal leak-off flow is an indication of a #2 seal failure and then confuse the implications of a high standpipe alarm with a low standpipe alarm. A standpipe level low alarm is an indication of a number 3 seal problem.
✗ D. Plausible because the candidate may believe that the high standpipe level can only be caused by increased leakage from the #1 seal and that the standpipe is the path of lowest resistance for the excessive flow.
Ref: S2.OP-AR.ZZ-0011(Q), Control Console 2CC1 and S2.OP-AB.RCP-0001(Q), Reactor Coolant Pump Abnormality | LO: N/A | Source: Modified — Salem Vision Database | Cognitive: Fundamental
Connections
- Related systems: RCPs
- Related procedures: S2.OP-AR.ZZ-0011 — Alarm Response (2CC1), AB.RCP-0001 — RCP Abnormality
- Related exam: 2020 NRC Written Exam