ENS 41217
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ENS Event | |
|---|---|
15:45 Nov 23, 2004 | |
| Title | Loss of Emergency Assessment Capability Due to Failure of Spds |
| Event Description | The Safety Parameter Display System (SPDS) is not transmitting data to the Technical Support Center. The cause of the failure is unknown at the present time. The Computer Support Group is attempting to restore transmission capability.
The licensee will inform the State of Arkansas as a courtesy and has informed the NRC Resident Inspector.
On 11/23/2004, at 1207 EST, Arkansas Nuclear One notified the NRC Operations Center that the Safety Parameter Display System (SPDS) was not transmitting data to the Technical Support Center (TSC) for a time period greater than 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />. Subsequent investigation determined that the SPDS was, in fact, operable during the time it was believed to be inoperable. Specifically, the Ramtek display was in service and updating normally during the time that SPDS was suspected to be inoperable. Although the SPDS consoles in the TSC were inoperable during this time, data was retrievable via the SPDS monitor touch screens. The licensee notified the NRC Resident Inspector. Notified R4 DO (B. Spitzberg) |
| Where | |
|---|---|
Arkansas Nuclear  Arkansas (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-3.63 h-0.151 days <br />-0.0216 weeks <br />-0.00497 months <br />) | |
| Opened: | Chuck Olson 12:07 Nov 23, 2004 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Dec 21, 2004 |
| 41217 - 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 540732019-05-19T23:09:00019 May 2019 23:09:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of the Safety Parameter Display System Due to Inverter Failure ENS 517852016-03-10T14:40:00010 March 2016 14:40:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Seismic Alarm Function Not Available During Semi-Annual Seismic System Functional Test ENS 515432015-11-17T17:11:00017 November 2015 17:11:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Maintenance on Seismic System Functional Test ENS 513402015-08-24T15:20:00024 August 2015 15:20:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Seismic Alarm Capability During Conduct of Functional Test ENS 511842015-06-27T02:49:00027 June 2015 02:49:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Seismic Monitor Declared Non Functional ENS 510292015-05-01T21:00:0001 May 2015 21:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Seismic Monitoring Due to Planned Maintenance ENS 489552013-04-22T21:23:00022 April 2013 21:23:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Operations Facility Not Available ENS 481412012-07-27T02:20:00027 July 2012 02:20:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Ac Power to the Emergency Operations Facility ENS 453762009-09-22T10:11:00022 September 2009 10:11:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Power to the Emergency Operations Facility ENS 453392009-09-11T15:25:00011 September 2009 15:25:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Spds Removed from Service for Maintenance ENS 452032009-07-14T03:00:00014 July 2009 03:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Ens Phone Circuits and Some Commercial Communication Capability ENS 450382009-05-03T12:45:0003 May 2009 12:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Eof Communication Capability Due to Equipment Failure ENS 440902008-03-25T03:48:00025 March 2008 03:48:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Spds Oos for Planned Maintenance ENS 428982006-10-11T19:39:00011 October 2006 19:39:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Spds Out of Service ENS 417962005-06-24T20:30:00024 June 2005 20:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System Failure in Emergency Operations Facility ENS 415682005-04-06T16:06:0006 April 2005 16:06:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Major Loss of Communications Capability Due to Offsite Fiber Optic Cable Cut ENS 415042005-03-19T07:30:00019 March 2005 07:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Advanced Notification Prior to Taking Spds Out of Service ENS 412172004-11-23T15:45:00023 November 2004 15:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Assessment Capability Due to Failure of Spds ENS 402032003-09-27T20:08:00027 September 2003 20:08:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System (Spds) ENS 401222003-08-29T22:50:00029 August 2003 22:50:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Offsite Emergency Siren Actuation Capability 2019-05-19T23:09:00 | |
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