Q6 — PRT Temperature and Cooling
007 PRTS-A1.03 (2.6)
Given:
- Unit 2 is at 100% Power
- PRT Temperature and Level are slowly rising
At time 15:00
- The Crew initiates performance of S2.OP-SO.PZR-0003 (PRESSURIZER RELIEF TANK OPERATION) Section 5.3, "Reducing PRT Temperature by Feed and Bleed"
Which ONE of the following completes the statements below concerning cooling of the PRT?
Leakage from the Reactor _(1)_ is causing PRT temperature to rise.
When performing S2.OP-SO.PZR-0003 Section 5.3, the liquid in the PRT will be pumped to the _(2)_.
- Unit 2 is at 100% Power
- PRT Temperature and Level are slowly rising
At time 15:00
- The Crew initiates performance of S2.OP-SO.PZR-0003 (PRESSURIZER RELIEF TANK OPERATION) Section 5.3, "Reducing PRT Temperature by Feed and Bleed"
Which ONE of the following completes the statements below concerning cooling of the PRT?
Leakage from the Reactor _(1)_ is causing PRT temperature to rise.
When performing S2.OP-SO.PZR-0003 Section 5.3, the liquid in the PRT will be pumped to the _(2)_.
A. (1) Head Vents (2) RCDT
B. (1) Head Vents (2) HUT
C. (1) Flange Leakoff (2) RCDT
D. (1) Flange Leakoff (2) HUT
▶ Show Answer & Explanation
✓ B. Correct. For Part 1, the Reactor head vents drain to the PRT and will cause PRT temperature to rise (with the Reactor at power). For Part 2, during the performance of S2.OP-SO.PZR-0003 Section 5.3, the liquid in the PRT will be pumped to the HUT using a RCDT Pump.
✗ A. Incorrect but plausible. Part 1 is correct. For Part 2, the drain of the PRT is physically connected to the RCDT. However, a check valve is situated in between the PRT drain and the RCDT. Consequently, the candidate could incorrectly recall the piping and pump layout between the PRT and RCDT and incorrectly conclude that during performance of S2.OP-SO.PZR-0003 Section 5.3, the liquid in the PRT will be pumped to the RCDT.
✗ C. Incorrect but plausible. For Part 1, Reactor Flange Leakoff is directed to the RCDT. The candidate could incorrectly conclude that Reactor Flange Leakoff actually drains to the PRT which would cause PRT temperature to rise. For Part 2, the drain of the PRT is physically connected to the RCDT. However, a check valve is situated in between the PRT drain and the RCDT. Consequently, the candidate could incorrectly recall the piping and pump layout between the PRT and RCDT and incorrectly conclude that during performance of S2.OP-SO.PZR-0003 Section 5.3, the liquid in the PRT will be pumped to the RCDT.
✗ D. Incorrect but plausible. For Part 1, Reactor Flange Leakoff is directed to the RCDT. The candidate could incorrectly conclude that Reactor Flange Leakoff actually drains to the PRT which would cause PRT temperature to rise. Part 2 is correct.
Ref: NOS05PZRPRT-06 | LO: NOS05PZRPRT-06 | Source: New | Cognitive: Lower
Connections
- Related systems: Pressurizer & PRT
- Related procedures: S2.OP-SO.PZR-0003 — PRT Operation
- Related exam: 2019 NRC Written Exam