ENS 45676
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ENS Event | |
|---|---|
17:00 Feb 3, 2010 | |
| Title | Feedwater Check Valve Leak Rate Exceeded Technical Specification Requirement |
| Event Description | At 1100 [CST] on February 3, 2010, it was discovered that a primary containment local leak rate test performed on feedwater check valve 1B21-F032B exceeded its acceptance criteria. Technical Specification Surveillance Requirement (SR) 3.6.1.3.11 requires that the combined leakage rate for both primary containment feedwater penetrations to be less than or equal to 2 gallons per minute. The measured leakage for 1B21-F032B was reported to be 2.5 gallons per minute (gpm). Operations immediately declared 1B21-F032B inoperable and initiated action to close the feedwater inlet shutoff valve 1B21-F065B to isolate the affected penetration. At 1136 [CST], 1B21-F065B was closed and its breaker was turned off to comply with TS 3.6.1.3, Condition C required actions.
At 1447 [CST], the Feedwater Leakage Control System (FWLCS) was declared inoperable in accordance with LCO 3.6.1.9 and the plant entered a 30-day action to restore FWLCS to an operable condition. After performance of a line flush, plans are underway to attempt to re-perform the local leak rate test for the feedwater check valve, 1B21-F032B. If unsuccessful, further corrective actions will be taken. The NRC Senior Resident has been informed. |
| Where | |
|---|---|
Clinton  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material | |
| Time - Person (Reporting Time:+0.18 h0.0075 days <br />0.00107 weeks <br />2.46564e-4 months <br />) | |
| Opened: | Jim Peterson 17:11 Feb 3, 2010 |
| NRC Officer: | John Knoke |
| Last Updated: | Feb 3, 2010 |
| 45676 - NRC Website
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