ENS Event | |
|---|---|
10:09 Oct 11, 2025 | |
| Title | 60-DAY Report of Invalid Actuation of Containment Isolation Valves |
| Event Description | The following information was provided by the licensee via phone and email:
This sixty-day telephone notification is being made per 10 CFR 50.73(a)(2)(iv)(A) under the provision 10 CFR 50.73(a)(1), as an invalid actuation of containment isolation valves in more than one system. On October 11, 2025, while in mode 5 for a refueling outage, an invalid actuation signal occurred while performing preventative maintenance on a 120V AC inverter. At the time of the event, one channel of the refuel floor exhaust (RFE) high radiation monitor was tripped due to a scheduled electrical bus outage. This electrical bus outage, in combination with the unexpected loss of power from the 120V AC inverter on another channel, caused the actuation of containment isolation valves in more than one system. The actuation was not the result of an actual plant condition and, therefore, is invalid. The containment isolation valves functioned as designed for the actuation signal received. There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified. |
| Where | |
|---|---|
Hope Creek  New Jersey (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
| Time - Person (Reporting Time:+1420.55 h59.19 days <br />8.456 weeks <br />1.946 months <br />) | |
| Opened: | Robert Bartelt 15:42 Dec 9, 2025 |
| NRC Officer: | Jordan Wingate |
| Last Updated: | Dec 9, 2025 |
| 58075 - NRC Website
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WEEKMONTHYEARENS 580752025-10-11T10:09:00011 October 2025 10:09:00
[Table view]10 CFR 50.73(a)(1), Submit an LER 60-DAY Report of Invalid Actuation of Containment Isolation Valves ENS 573022024-07-10T13:02:00010 July 2024 13:02:00 10 CFR 50.73(a)(1), Submit an LER 60-DAY Optional Telephonic Notification of Invalid Residual Heat Removal Activation ENS 450462009-04-13T20:46:00013 April 2009 20:46:00 10 CFR 50.73(a)(1), Submit an LER Human Performance Error While Troubleshooting a Power Supply 2025-10-11T10:09:00 | |