ENS Event | |
|---|---|
21:40 Dec 4, 2024 | |
| Title | |
| Event Description | The following information was provided by the licensee via phone and email:
At 1640 EST, on December 4, 2024, secondary containment was declared inoperable. This condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(C), as an event or condition that could have prevented fulfillment of a safety function. Secondary containment was declared inoperable due to a small hole discovered in the service water piping within secondary containment. The effective safety function was restored at 1730 EST by installation of a temporary repair and secondary containment has been restored to operable. There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified. Notified R2DO (Suber)
The following information was provided by the licensee via phone and email: The purpose of this notification is to retract EN 57454 which was made on December 4, 2024, at 1901 EST. At 1640 on December 4, 2024, secondary containment was declared inoperable due to a small hole discovered in the service water piping within secondary containment. This condition was reported as a non-emergency notification per 10 CFR 50.72(b)(3)(v)(C). Subsequent to this, additional analysis of the hole size determined that secondary containment was operable. Secondary containment maintained adequate leak tightness thereby ensuring the technical specification required vacuum could be established and maintained, and releases to the environment following a postulated accident would be within regulatory limits. The operability determination for secondary containment has been updated indicating that secondary containment operability was never lost for this event. As a result, there was not a condition that could have prevented the system from fulfilling the safety function. Secondary containment was operable during this time. The NRC Resident Inspector has been notified. Notified R2DO (Suggs) |
| Where | |
|---|---|
Brunswick  North Carolina (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material | |
| Time - Person (Reporting Time:+-2.65 h-0.11 days <br />-0.0158 weeks <br />-0.00363 months <br />) | |
| Opened: | Chris Denton 19:01 Dec 4, 2024 |
| NRC Officer: | Jon Lilliendahl |
| Last Updated: | Jan 23, 2025 |
| 57454 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 574542024-12-04T21:40:0004 December 2024 21:40:00
[Table view]10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Secondary Containment Inoperable ENS 569872024-01-02T04:33:0002 January 2024 04:33:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Invalid Actuation of Containment Isolation Valves ENS 528882017-08-04T19:11:0004 August 2017 19:11:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Secondary Containment Inoperable Due to Opening in Service Water Piping ENS 500462014-04-20T06:15:00020 April 2014 06:15:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Loss of Secondary Containment Due to Opening in Reactor Building Roof Drain Piping ENS 499212014-03-17T11:50:00017 March 2014 11:50:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Secondary Containment Airlock Door Interlock Malfunction ENS 499102014-03-13T13:37:00013 March 2014 13:37:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Apparent Secondary Containment Airlock Door Interlock Malfunction ENS 498802014-03-06T21:05:0006 March 2014 21:05:00 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Secondary Containment Airlock Door Interlock Malfunction 2024-12-04T21:40:00 | |