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Exams > 2023 Q27 — AB.RCP-0001 / CCW Loss Time Limit and Bearing Temp

2023 Q27 — AB.RCP-0001 / CCW Loss Time Limit and Bearing Temp

⚠️ DRAFT
Q27 — AB.RCP-0001 / CCW Loss Time Limit and Bearing Temp 003 G2.1.7 (4.4)
Given:
• Salem Unit 2 is at 100% power
Then:
• OHA D-20, 21 RCP BRG CLG WTR FLO LO, is Alarming
• RO reports that all RCP motor bearing temperatures are rising

Which of the following completes the statement?

Per S2.OP-AB.RCP-0001, RCP Abnormality, the crew has a MAXIMUM of (1) minutes to restore CCW flow OR is required to trip the reactor and stop the RCP anytime RCP motor bearing temperatures exceeds (2).
A. 2 minutes; 175°F
B. 2 minutes; 165°F
C. 5 minutes; 165°F
D. 5 minutes; 175°F
▶ Show Answer & Explanation
✓ D. Correct. Per AB.RCP-0001 Attachment 1: 5 minutes to restore CCW or trip reactor and stop affected RCP. Anytime motor bearing temperature exceeds 175°F, trip reactor and stop affected RCP. Additional trip criteria: motor winding temp >302°F, seal water outlet >190°F, shaft vibration >20 mils, #1 seal leakoff <0.8 gpm or ≥6 gpm.
✗ A. Incorrect. 2 minutes is the time limit for loss of seal injection AND thermal barrier CCW concurrently, not for loss of CCW to motor bearings alone. 175°F is the correct motor bearing temperature limit.
✗ B. Incorrect. 2 minutes is the concurrent seal injection/thermal barrier CCW loss time limit, not the CCW loss time limit. 165°F is the ARP limit that directs transition to AB.RCP-0001, not the AB trip limit.
✗ C. Incorrect. 5 minutes is the correct CCW restoration time limit, but 165°F is the ARP limit directing entry into AB.RCP-0001. The AB.RCP-0001 trip limit for motor bearing temperature is 175°F.
Ref: S2.OP-AB.RCP-0001 (R28) | Source: Bank - Beaver Valley 2018 NRC RO29 | Cognitive: Comprehension/Analysis

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