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Exams > 2019 Q87 — CCW Pump Trip Mode 5 Procedures

2019 Q87 — CCW Pump Trip Mode 5 Procedures

⚠️ DRAFT
Q87 — CCW Pump Trip Mode 5 Procedures 008 CCW System - A2.01 (3.3)
Given:
• Unit 2 is in MODE 5 with RCS at Water Elevation 103.5 feet
• ALL CCW Pumps are in service

At time 17:00
• The NCO observes the following indications:
(CCW Lo HDR PRESS ALARM 21 & 22, 22 & 23 CCW Pumps Tripped)

Which ONE of the following completes the statement below?

The crew will perform ___
A. S2.OP-AB.RHR-0001 (LOSS OF RHR) ONLY
B. S2.OP-AB.RHR-0002 (LOSS OF RHR AT REDUCED INVENTORY) ONLY
C. S2.OP-AB.CC-0001 (COMPONENT COOLING ABNORMALITY) and S2.OP-AB.RHR-0002 (LOSS OF RHR AT REDUCED INVENTORY) CONCURRENTLY
D. S2.OP-AB.CC-0001 (COMPONENT COOLING ABNORMALITY) and S2.OP-AB.RHR-0001 (LOSS OF RHR) CONCURRENTLY
▶ Show Answer & Explanation
✓ D. Correct. Based on indications on the CCW Bezel, 22 and 23 CCW Pumps have tripped which is causing CC Header Low Pressure alarms. IAW the Abnormal procedures network, the crew is required to perform S2.OP-AB.CC-0001 (COMPONENT COOLING ABNORMALITY) and S2.OP-AB.RHR-0001 (LOSS OF RHR) CONCURRENTLY.
✗ A. Incorrect but plausible. The candidate could incorrectly conclude that only performance of the Loss of RHR is required, since core boiling is a major concern and RCS is at Water Elevation 103.5 feet.
✗ B. Incorrect but plausible. The candidate could incorrectly conclude that only performance of the Loss of RHR at reduced inventory is required, since the PZR is empty and core boiling is a major concern.
✗ C. Incorrect but plausible. This distractor would have been correct if RCS was at Water Elevation of 101 feet or less.
Ref: S2.OP-AB.CC-0001 (COMPONENT COOLING ABNORMALITY), S2.OP-AB.RHR-0001 (LOSS OF RHR), S2.OP-AB.RHR-0002 (LOSS OF RHR AT REDUCED INVENTORY) | LO: Not specified | Source: New | Cognitive: Higher

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