ENS 49776
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ENS Event | |
|---|---|
15:53 Jan 29, 2014 | |
| Title | Loss of Technical Support Center Ventilation Fan |
| Event Description | This telephone notification is provided in accordance with Exelon Reportability manual SAF 1.10, 'Major Loss of Emergency Preparedness Capabilities', and 10 CFR 50.72(b)(3)(xiii).
On January 29th at 09:53 CST, it was determined that the onsite Technical Support Center (TSC) Ventilation System Supply Fan had failed (due to failed fan belts as a result of degraded alignment), resulting in loss of ventilation for the TSC. Repairs have been initiated, however repairs will not have been completed within the time required to staff the TSC. There is currently no emergency event in progress requiring TSC staffing. The Main Control Room remains available as an Emergency Response Facility (ERF), should an event occur requiring Emergency Response Facilities to be staffed. The licensee has notified the Senior Resident Inspector of the issue.
After repairs were completed, the TSC Ventilation was restored to service at [2350 CST on 01/30/2014]. The licensee has notified the NRC Resident Inspector. Notified the R3DO (Sheldon). |
| Where | |
|---|---|
Lasalle  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+2.67 h0.111 days <br />0.0159 weeks <br />0.00366 months <br />) | |
| Opened: | Jason Depriest 18:33 Jan 29, 2014 |
| NRC Officer: | Daniel Mills |
| Last Updated: | Jan 31, 2014 |
| 49776 - NRC Website | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (97 %) |
| After | Power Operation (97 %) |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
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 | |
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