ENS 50410
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ENS Event | |
|---|---|
10:30 Aug 27, 2014 | |
| Title | 26 of 40 Ep Sirens Could Not Be Verified Functional |
| Event Description | At 0645 CDT on August 27, 2014, Exelon was notified that during the daily test at 0530 CDT of the offsite sirens, the vendor received an alarm on Clinton Power Station siren communications. This Emergency Preparedness (EP) siren communications issue results in 26 of the 40 EP sirens not being verified as functional, which affects 84.4% of the EPZ population. The loss of communications represents more than 25% of the EPZ population for greater than 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and is therefore reportable under 10 CFR 50.72(b)(3)(xiii).
The cause of issue has been isolated to a microwave link at Clinton Power Station that communicates via radio frequency to each siren. The siren vendor is currently investigating to repair the issue. The DeWitt County Emergency Manager has been notified. DeWitt County has implemented the Emergency Message System through 'Code Red' notification in lieu of siren communications. The NRC Senior Resident has been notified.
The DeWitt County Emergency Manager has been notified. DeWitt County has implemented the backup means of notification called 'Route Alerting' in lieu of siren communications. Route Alerting consists of vehicles and public address systems. At 1400 CDT only 2 sirens remain not fully functional. These 2 sirens represent 0.7% of EPZ population. Work continues to restore these 2 sirens. The NRC Senior Resident has been informed. Notified R3DO (Stone). |
| Where | |
|---|---|
Clinton  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+3.08 h0.128 days <br />0.0183 weeks <br />0.00422 months <br />) | |
| Opened: | Steven Stricklan 13:35 Aug 27, 2014 |
| NRC Officer: | Charles Teal |
| Last Updated: | Aug 27, 2014 |
| 50410 - NRC Website | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (98 %) |
| After | Power Operation (98 %) |
WEEKMONTHYEARENS 563562023-02-06T11:30:0006 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 521022016-07-18T20:00:00018 July 2016 20:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Offsite Communications Capability ENS 514282015-09-28T19:44:00028 September 2015 19:44:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Invalid Seismic Event Alarm ENS 513242015-08-17T10:05:00017 August 2015 10:05:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Assessment Capability Due to Planned Maintenance on Seismic Instrumentation ENS 512822015-08-01T17:05:0001 August 2015 17:05:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Invalid Seismic Event Alarm ENS 512632015-07-26T09:49:00026 July 2015 09:49:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Invalid Seismic Event Alarm ENS 512212015-07-10T12:00:00010 July 2015 12:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Siren Out of Service ENS 510382015-05-04T11:15:0004 May 2015 11:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Power to the Area Radiation and Process Radiation Local Area Network ENS 509992015-04-21T05:00:00021 April 2015 05:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Assessment Capability Due to Non-Functional Seismic Monitor Laptop ENS 504102014-08-27T10:30:00027 August 2014 10:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness 26 of 40 Ep Sirens Could Not Be Verified Functional ENS 501102014-05-12T13:45:00012 May 2014 13:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Maintenance on Safety Parameter Display System ENS 475322011-12-18T07:19:00018 December 2011 07:19:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System Out of Service ENS 475022011-12-06T19:06:0006 December 2011 19:06:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Communications Capability Due to a Major Cable Cut ENS 465852011-02-02T13:00:0002 February 2011 13:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Partial Loss of Emergency Sirens Due to Severe Winter Storm ENS 459652010-06-01T14:00:0001 June 2010 14:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Unavailable Due to Preventive Maintenance ENS 452442009-08-04T15:53:0004 August 2009 15:53:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Sirens ENS 450722009-05-16T00:42:00016 May 2009 00:42:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness 21 of 44 Sirens Out of Service Due to Severe Weather ENS 438022007-11-21T20:08:00021 November 2007 20:08:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System Degradation ENS 434332007-06-20T18:55:00020 June 2007 18:55:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Major Loss of Emergency Assessment Capability - 13 of 44 Emergency Sirens Out of Service ENS 431262007-01-26T23:15:00026 January 2007 23:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System (Spds) Declared Inoperable. ENS 430182006-12-01T12:30:0001 December 2006 12:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Sirens ENS 423262006-02-10T12:10:00010 February 2006 12:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Assessement Capability ENS 423112006-02-05T16:25:0005 February 2006 16:25:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Spds for Greater than 8 Hours ENS 422582006-01-13T22:45:00013 January 2006 22:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Communications - Greater than 25% of Emergency Notification Sirens Unavailable ENS 417732005-06-14T16:24:00014 June 2005 16:24:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Greater than 25% of the Licensee Notification Sirens Became Unavailable ENS 413342005-01-14T07:39:00014 January 2005 07:39:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Safety Parameter Display System ENS 413112005-01-06T13:45:0006 January 2005 13:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Power to Offsite Sirens Greater than 1 Hour Due to Inclement Weather ENS 405162004-02-12T23:45:00012 February 2004 23:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System (Spds) Out of Service for Maintenance. 2023-02-06T11:30:00 | |
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