ENS 57552
ENS Event | |
|---|---|
04:20 Feb 18, 2025 | |
| Title | Loss of Communication Capability |
| Event Description | The following information was provided by the licensee via phone and email:
At approximately 2320 EST on 02/17/2025, it was discovered that external network access was unavailable, to include access to DEENS (Dominion Energy Emergency Notification System) rendering the system non-functional. Subsequently, the backup method for activating the station ERO (Emergency Response Organization) was attempted and was unable to be verified. Therefore, neither the primary nor backup methods for activating the site ERO were available. Corporate IT has been notified and is investigating. [Control room staff] contacted the North Anna Power Station and verified similar issues with DEENS availability and backup ERO activation. On 02/18/2025, at 0403, an additional backup ERO activation phone number was provided [and documented in a standing order] in the event that the backup number listed in attachment 7 of EP-AA-CSD-201 (Notifications and Communications) is not available. This event is reportable in accordance with 10CFR50.72(b)(3)(xiii), any event that results in a major loss of offsite communications capability. The external network access and DEENS were restored on 02/18/2025 at 0725. The NRC Resident Inspector has been notified.
It has since been determined that the phone number provided at 0400 on 2/18/2025, would not have worked to activate the ERO. However, the network issues were resolved at approximately 0700 on 2/18/2025 when DEENS capability was restored. Notified R2DO (Penmetsa). |
| Where | |
|---|---|
Surry  Virginia (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+1.67 h0.0696 days <br />0.00994 weeks <br />0.00229 months <br />) | |
| Opened: | Thayer Meyer 06:00 Feb 18, 2025 |
| NRC Officer: | Adam Koziol |
| Last Updated: | Feb 19, 2025 |
| 57552 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 575522025-02-18T04:20:00018 February 2025 04:20:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Communication Capability ENS 496732013-12-23T13:28:00023 December 2013 13:28:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Communications with Virginia State Eoc Due to Power Outage ENS 459862010-06-08T13:48:0008 June 2010 13:48:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation, 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness, 10 CFR 50.72(b)(2)(iv)(A), System Actuation - ECCS Discharge Automatic Reactor Trip with Safety Injection Due to Loss of Vital Ac Bus ENS 440542008-03-12T09:00:00012 March 2008 09:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Interruption to Ens Telephone Service ENS 428852006-10-07T17:40:0007 October 2006 17:40:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Site Access Road Flooded ENS 428712006-10-02T04:00:0002 October 2006 04:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Offsite Sirens Inoperable for Planned Maintenance ENS 415332005-03-28T19:21:00028 March 2005 19:21:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Outage of Spds Due to System Upgrade ENS 406982004-04-22T14:45:00022 April 2004 14:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System (Spds) Declared Inoperable ENS 401812003-09-19T15:30:00019 September 2003 15:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Sirens 2025-02-18T04:20:00 | |