ENS Event | |
|---|---|
00:30 Mar 13, 2005 | |
| Title | Pinhole Leak in Instrument Drain Line Off Main Steam System |
| Event Description | The following was provided by the licensee:
This report is being made pursuant to 10CFR50.72(b)(3)(ii)(A). At 1830 on March 12, 2005, during the U-2 vessel pressure test, a leak was identified on the 2B21-F028D. The drain piping weld had pinhole leaks at the weld with a leak rate of 60 drops per minute. Due to welding or material defects in ASME Class 1 components, Technical Requirement Manual 3.4.a., condition A was entered. The component was isolated and corrective actions are in progress to repair the leakage. Repairs will be completed and tested prior to startup. The valve 2B21-F028D is located in the Main Steam system downstream of the outboard main steam isolation valve. The leaking weld is the connecting weld of the valve body to the drain line. There was no prior history of repair on the valve or weld from the last outage. The licensee stated no indication was present to indicate the valve was leaking steam during normal operation. The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
LaSalle  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded | |
| Time - Person (Reporting Time:+-0.2 h-0.00833 days <br />-0.00119 weeks <br />-2.7396e-4 months <br />) | |
| Opened: | Mike Fitzpatrick 00:18 Mar 13, 2005 |
| NRC Officer: | John Knoke |
| Last Updated: | Mar 13, 2005 |
| 41487 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Cold Shutdown (0 %) |
| After | Cold Shutdown (0 %) |
WEEKMONTHYEARENS 581022025-12-29T22:00:00029 December 2025 22:00:00
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