ENS Event | |
|---|---|
18:10 Mar 18, 2023 | |
| Title | Defect in Reactor Penetration Weld |
| Event Description | The following information was provided by the licensee via email:
On 3/18/2023 at 1410 EDT, with Nine Mile Point Nuclear Station Unit 1 in a planned refueling outage, the main control room was notified of the results of an automated examination of a dissimilar metal weld on reactor penetration N2E. The results indicate a defect present which cannot be found acceptable under ASME Section XI, IWB-3600. This 8-hour non-emergency report is being made based upon requirements of 10CFR50.72(b)(3)(ii)(A) which states, `The licensee shall notify the NRC ... of the occurrence of ... any event or condition that results in: (A) The condition of the nuclear power plant, including its principal safety barriers, being seriously degraded.' The NRC Senior Resident was informed. A repair plan is being developed. |
| Where | |
|---|---|
Nine Mile Point  New York (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded | |
| Time - Person (Reporting Time:+0.95 h0.0396 days <br />0.00565 weeks <br />0.0013 months <br />) | |
| Opened: | Chris Grapes 19:07 Mar 18, 2023 |
| NRC Officer: | Ernest West |
| Last Updated: | Mar 18, 2023 |
| 56421 - NRC Website
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WEEKMONTHYEARENS 564212023-03-18T18:10:00018 March 2023 18:10:00
[Table view]10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Defect in Reactor Penetration Weld ENS 433692007-05-17T16:30:00017 May 2007 16:30:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Degraded Condition - Degradation of Principal Safety Barrier 2023-03-18T18:10:00 | |