Q36 — Condenser Vacuum / Seal Water Temperature
055 CARS-K3.01 (2.5)
Which ONE of the following completes the statement below?
___ can cause Main Condenser vacuum to degrade.
___ can cause Main Condenser vacuum to degrade.
A. Excessively low TAC supply temperature
B. Excessively high Vacuum Pump Seal Water flow
C. Vacuum Pump Separating Tank releasing through the overflow
D. Excessively high Vacuum Pump Seal Water Temperature
▶ Show Answer & Explanation
✓ D. Correct. As Seal Water temperature increases, Vacuum Pump performance decreases, and can result in degrading vacuum.
✗ A. Excessively low TAC supply temperature will cause Seal Water Temperature to lower which would actually improve Condenser Vacuum.
✗ B. Excessively high Vacuum Pump Seal Water flow will cause Seal Water Temperature to lower which would actually improve Condenser Vacuum.
✗ C. Vacuum Pump Separating Tank releasing through the overflow will cause Seal Water Temperature to lower which would actually improve Condenser Vacuum.
Ref: NOS05CAR000-07 (Condenser Air Removal and Priming System) | LO: NOS05CAR000-07 Obj 13 — Given plant conditions, relate the Condenser Air Removal and Priming System with the Main Condenser | Source: Bank | Cognitive: Higher
Connections
- Related systems: Condenser Air Removal
- Related exam: 2018 NRC Written Exam