Q60 — CW Waterbox Tube Leak / Condensate Alarms
T2G2 056 G2.4.46 (4.2)
Given:
- Salem Unit 2 is at 100% power
Then:
- A tube in one of the Circulating Water (CW) waterboxes completely severs
Which of the following control room console alarms would confirm a gross tube leak in a CW waterbox?
1) Dissolved Oxygen Hi
2) Hydrazine Lo
3) Condensate Pump Disch Sodium Hi
4) Hotwell Outlet Conductivity Hi
- Salem Unit 2 is at 100% power
Then:
- A tube in one of the Circulating Water (CW) waterboxes completely severs
Which of the following control room console alarms would confirm a gross tube leak in a CW waterbox?
1) Dissolved Oxygen Hi
2) Hydrazine Lo
3) Condensate Pump Disch Sodium Hi
4) Hotwell Outlet Conductivity Hi
A. 1 and 3 Only
B. 2 and 4 Only
C. 1, 3, and 4 Only
D. 2, 3, and 4 Only
▶ Show Answer & Explanation
✓ C. Correct. Based on a severed tube in a waterbox, these alarms would confirm a tube leak in a CW waterbox.
✗ A. Plausible because these two alarms would confirm a waterbox tube leak. Incorrect in that the answer is incomplete and missing Hotwell Outlet Conductivity Hi.
✗ B. Plausible because Dissolved Oxygen alarm would be expected and Hydrazine Lo alarm is an alarm for the feedwater system. Incorrect in that it's not expected for river water into the condensate system to impact the concentration of Hydrazine.
✗ D. Plausible because these alarms would confirm a tube leak. Incorrect in that it's not expected for river water into the condensate system to impact the concentration of Hydrazine.
Ref: S2.OP-AB.CHEM-0001 (R30) | LO: NOS05CONTMT-17, Objective 3.g | Source: New | Cognitive: Comprehension/Analysis
Connections
- Related systems: Feed & Condensate
- Related procedures: AB.CHEM-0001 — Secondary Chemistry Abnormality
- Related exam: 2023 NRC Written Exam