Q91 — RCP Seal Injection Flow / TS 3.5.4
T2G2 002 G2.2.37 (4.6)
Given:
- Salem Unit 2 is at 100% power
- 21 Charging Pump is in service
- Surveillance test S2.OP-ST.RC-0007, Seal Injection Flow, was just completed.
The following test data was recorded:
- Charging Header pressure = 2450 psig
- 2CV55 fully open
- 21 RCP seal injection flow = 10 gpm
- 22 RCP seal injection flow = 10.5 gpm
- 23 RCP seal injection flow = 9.8 gpm
- 24 RCP seal injection flow = 10.2 gpm
Based on the surveillance test data, what action is required?
[REFERENCE PROVIDED]
- Salem Unit 2 is at 100% power
- 21 Charging Pump is in service
- Surveillance test S2.OP-ST.RC-0007, Seal Injection Flow, was just completed.
The following test data was recorded:
- Charging Header pressure = 2450 psig
- 2CV55 fully open
- 21 RCP seal injection flow = 10 gpm
- 22 RCP seal injection flow = 10.5 gpm
- 23 RCP seal injection flow = 9.8 gpm
- 24 RCP seal injection flow = 10.2 gpm
Based on the surveillance test data, what action is required?
[REFERENCE PROVIDED]
A. Restore the inoperable Charging Pump to Operable status within 72 hours per TS 3.5.2 ECCS Subsystems Tavg > 350 °F.
B. No action is required, the surveillance test is satisfactory.
C. Adjust manual seal injection throttle valves to within the limit within 4 hours as required by TS 3.5.4, Seal Injection Flow.
D. No TS action is required unless the seal injection flows can NOT be adjusted to within the limits within 4 hours.
▶ Show Answer & Explanation
✓ C. Correct. The surveillance data for total RCP seal injection flows is Unsat due to exceeding the Tech Spec 3.5.4 limit of ≤ 40 gpm. Tech Spec 3.5.4 is not met and the required action is to make adjustments to restore seal injection flows to within limits within 4 hours.
✗ A. Plausible because the SRO may incorrectly determine that the unsat seal injection flows is a result of a degraded Charging Pump and therefore declare 21 Charging Pump Inoperable and enter TS 3.5.2 Action a.
✗ B. Plausible if the SRO misinterprets the surveillance data and thinks the test data results meet the Tech Spec surveillance requirements for total seal flows.
✗ D. Plausible if the SRO misinterprets the note in Tech Spec 3.5.4 about TS 4.0.4 exemption is allowed for up to 4 hours.
Ref: TS 3.5.4 and bases | LO: NOS05TECHSPEC-12, Objective 14. Describe the general component and parameter categories that are addressed by Technical Specification Sections 3/4.1 through 3/4.12 | Source: New | Cognitive: Comprehension/Analysis
Connections
- Related systems: RCPs, CVCS, ECCS
- Related tech specs: TS 3.5.4
- Related exam: 2023 NRC Written Exam