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Exams > 2019 Q80 — Loss of Control Air PZR Level / RCS Cooldown

2019 Q80 — Loss of Control Air PZR Level / RCS Cooldown

⚠️ DRAFT
Q80 (SRO) — Loss of Control Air PZR Level / RCS Cooldown 065 Loss of Instrument Air-G2.1.28 (4.1)
Given:
• Unit 2 is in MODE 3 during a plant startup
• 22 Charging Pump is in service
• TAVG is 547 °F
• Control Air Pressure is 84 psig and lowering
• PZR level is 25% and rising

Which ONE of the following completes the statement below?

Any time Pressurizer Level approaches a MINIMUM of _(1)_%, then the crew is required to commence an RCS Cooldown to 350 °F using guidance contained in _(2)_.
A. (1) 70 (2) S2.OP-AB.CA-0001 (LOSS OF CONTROL AIR)
B. (1) 70 (2) S2.OP-IO.ZZ-0006 (HOT STANDBY TO COLD SHUTDOWN)
C. (1) 90 (2) S2.OP-AB.CA-0001 (LOSS OF CONTROL AIR)
D. (1) 90 (2) S2.OP-IO.ZZ-0006 (HOT STANDBY TO COLD SHUTDOWN)
▶ Show Answer & Explanation
✓ C. Correct. Any time Pressurizer Level approaches a MINIMUM of 90%, then the crew is required to commence an RCS Cooldown to 350 °F using guidance contained in S2.OP-AB.CA-0001.
✗ A. For Part 1, 70% is the PZR LEVEL HI Bezel Alarm. Consequently, the candidate could incorrectly conclude a cooldown to 350 °F is required any time PZR Level approaches 70%. Part 2 is correct.
✗ B. For Part 1, 70% is the PZR LEVEL HI Bezel Alarm. Consequently, the candidate could incorrectly conclude a cooldown to 350 °F is required any time PZR Level approaches 70%. For Part 2, the candidate could incorrectly conclude that S2.OP-AB.CA-0001 sends the crew to IOP S2.OP-IO.ZZ-0006 (HOT STANDBY TO COLD SHUTDOWN) for the cooldown.
✗ D. Part 1 is correct. For Part 2, the candidate could incorrectly conclude that S2.OP-AB.CA-0001 sends the crew to IOP S2.OP-IO.ZZ-0006 (HOT STANDBY TO COLD SHUTDOWN) for the cooldown.
Ref: S2.OP-AB.CA-0001 (Loss of Control Air) | LO: NOS05ABCA01-07 | Source: New | Cognitive: Lower

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