ENS 56364
ENS Event | |
---|---|
11:30 Feb 6, 2023 | |
Title | Loss of Communications and Assessment Capabilities |
Event Description | The following information was provided by Constellation via email:
On 02/06/2023 at 0416 EST, the Constellation Emergency Response Organization (ERO) Notification Database System uploaded data files into the Mass Notification System (Everbridge) which is used to notify ERO personnel when activated. At 0630, the individual reviewing the uploaded files discovered that the data files did not upload properly and that Everbridge may not notify all ERO individuals within the required 10 minutes of system initiation. Constellation resolved the issue by 0752. During the time period of 0416 to 0752, control room operators would have been unaware that the ERO notification was not successful. Therefore, this issue constitutes a loss of offsite communications capability and is reportable under 10 CFR 50.72(b)(3)(xiii), 'The licensee shall notify the NRC as soon as practical and in all cases within eight hours of the occurrence of any event that results in a major loss of emergency assessment capability, offsite response capability, or offsite communications capability (e.g., significant portion of control room indication, Emergency Notification System, or offsite notification system).' This loss of offsite communications capability affected all Constellation nuclear stations. There was no impact on the health and safety of the public or plant personnel. Each affected station NRC Resident Inspectors have been or will be notified. |
Where | |
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Lasalle Illinois (NRC Region 3) | |
Reporting | |
10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
Time - Person (Reporting Time:+1.93 h0.0804 days <br />0.0115 weeks <br />0.00264 months <br />) | |
Opened: | Dennis Moore 13:26 Feb 6, 2023 |
NRC Officer: | Karen Cotton-Gross |
Last Updated: | Feb 14, 2023 |
56364 - 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 (92 %) |
After | Power Operation (92 %) |
WEEKMONTHYEARENS 563642023-02-06T11:30:0006 February 2023 11:30:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Communications and Assessment Capabilities ENS 550862021-01-29T03:30:00029 January 2021 03:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Degraded Due to Supply Fan Belt Failure ENS 521042016-07-18T19:50:00018 July 2016 19:50:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Offsite Communications Capability ENS 515302015-11-11T19:44:00011 November 2015 19:44:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Seismic Monitor Inoperable ENS 512472015-07-22T05:13:00022 July 2015 05:13:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Seismic Monitor Inoperable ENS 512132015-07-08T23:37:0008 July 2015 23:37:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation Out of Service ENS 512052015-07-08T06:30:0008 July 2015 06:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Seismic Monitor Inoperable ENS 511642015-06-17T23:41:00017 June 2015 23:41:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation System Return Damper Failed Closed ENS 511332015-06-06T17:13:0006 June 2015 17:13:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Technical Support Center Ventilation ENS 509262015-03-26T18:30:00026 March 2015 18:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Seismic Monitor Not Available for Emergency Plan Assessment ENS 504642014-09-17T13:00:00017 September 2014 13:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation System Removed from Service for Planned Maintenance ENS 497762014-01-29T15:53:00029 January 2014 15:53:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Technical Support Center Ventilation Fan ENS 490802013-05-30T14:00:00030 May 2013 14:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation System Maintenance ENS 484372012-10-24T13:25:00024 October 2012 13:25:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation Removed from Service for Planned Maintenance ENS 481032012-07-13T15:50:00013 July 2012 15:50:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Tsc Out of Service Due to Failed Fan Belt ENS 474272011-11-10T07:00:00010 November 2011 07:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Out of Service Due to Planned Maintenance ENS 453522009-09-16T06:39:00016 September 2009 06:39:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Communications ENS 453412009-09-11T14:04:00011 September 2009 14:04:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Unavailable ENS 447382008-12-21T14:22:00021 December 2008 14:22:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Weather Related Loss of Emergency Sirens ENS 430202006-12-01T17:42:0001 December 2006 17:42:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Thirteen Emergency Sirens 2023-02-06T11:30:00 | |