ENS Event | |
|---|---|
15:10 Sep 4, 2025 | |
| Title | |
| Event Description | The following information was provided by the licensee via phone email:
On September 4, 2025, at 1110 EDT, it was determined that the units are in an unanalyzed condition. A review of DC control circuit protection schemes identified circuits which are uncoordinated due to inadequate fuse sizing. This results in a concern that postulated fire damage in one area could cause a short circuit without adequate protection, leading to the unavailability of equipment credited for 10 CFR 50 Appendix R safe shutdown. This condition is not bounded by existing design and licensing documents; however, it poses no impact to the health and safety of the public or plant personnel. Therefore, this event is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(ii)(B). Compensatory actions for affected fire areas have been implemented. The NRC Senior Resident Inspector has been notified. |
| Where | |
|---|---|
Peach Bottom  Pennsylvania (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition | |
| LER: | 05000277/LER-2025-002 Uncoordinated DC Circuits Cause Unanalyzed Condition |
| Time - Person (Reporting Time:+-2.47 h-0.103 days <br />-0.0147 weeks <br />-0.00338 months <br />) | |
| Opened: | Matthew Batdorf 12:42 Sep 4, 2025 |
| NRC Officer: | Ernest West |
| Last Updated: | Sep 4, 2025 |
| 57899 - NRC Website
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WEEKMONTHYEARENS 578992025-09-04T15:10:0004 September 2025 15:10:00
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