ENS 46436
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ENS Event | |
|---|---|
20:15 Nov 24, 2010 | |
| Title | Safety Parameter Display System and Emergency Response Data System Out of Service for Planned Maintenance |
| Event Description | On 11/24/10 at 1515 EST, the Safety Parameter Display System (SPDS) and Emergency Response Data System (ERDS) were removed from service to support activities for a planned maintenance outage on the UPS vital bus power supply. The duration of work is expected to be approximately 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />. During this time, the majority of the Control Room indications remain available to the plant staff, and will be used for emergency response, if needed. Information will be communicated to the NRC using other available communication systems, if needed. The plant is currently in Mode 4, and will remain in Mode 4, for the duration of the SPDS and ERDS unavailability. Since the unavailability will last greater than 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, this is considered a Loss of Emergency Assessment Capability, and reportable under 10CFR50.72(b)(3)(xiii).
Followup notification will be made when SPDS and ERDS have been restored. The licensee notified the NRC Resident Inspector.
Update to Event #46436: On 11/26/10 at 1733 EST, regarding Safety Parameter Display System (SPDS) and Emergency Response Data System (ERDS) systems removed from service to support planned maintenance on the UPS vital bus power supply. Planned work which resulted in the loss of SPDS and ERDS is complete. All Emergency Assessment Capabilities have been restored. The licensee informed the NRC Resident Inspector. Notified R3DO (Dickson). |
| Where | |
|---|---|
Fermi  Michigan (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-4.25 h-0.177 days <br />-0.0253 weeks <br />-0.00582 months <br />) | |
| Opened: | Jim Konrad 16:00 Nov 24, 2010 |
| NRC Officer: | Donald Norwood |
| Last Updated: | Nov 26, 2010 |
| 46436 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Cold Shutdown (0 %) |
| After | Cold Shutdown (0 %) |
WEEKMONTHYEARENS 573252024-09-16T17:29:00016 September 2024 17:29:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Active Seismic Monitoring System Inoperable ENS 566502023-08-01T13:55:0001 August 2023 13:55:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Active Seismic Monitoring System Inoperable ENS 538252019-01-14T05:00:00014 January 2019 05:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Active Seismic Monitoring System Inoperable ENS 535622018-08-24T04:00:00024 August 2018 04:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Inoperable Seismic Monitoring System ENS 515162015-11-05T15:00:0005 November 2015 15:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Integrated Plant Computer System Removed from Service ENS 498512014-02-23T17:00:00023 February 2014 17:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Integrated Plant Computer System Removed from Service for Planned Maintenance ENS 488872013-04-04T08:06:0004 April 2013 08:06:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Failure of the Integrated Plant Computer System ENS 484682012-11-01T12:00:0001 November 2012 12:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Integrated Plant Computer System Out-Of-Service Outside the Control Room for Planned Maintenance ENS 484512012-10-29T21:00:00029 October 2012 21:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Erds Lost Due to Process Computer System Data Server Failure ENS 483382012-09-24T08:07:00024 September 2012 08:07:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System Process Computer Data Server Failure ENS 481972012-08-16T18:58:00016 August 2012 18:58:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Integrated Plant Computer Failure ENS 481232012-07-21T02:30:00021 July 2012 02:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Anticipatory Loss of Spds and Erds Due to Possible Loss of Integrated Plant Computer System During Troubleshooting ENS 481062012-07-14T06:06:00014 July 2012 06:06:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unexpected Integrated Plant Computer System Failure ENS 480612012-07-02T12:00:0002 July 2012 12:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Spds and Erds Out of Service for Maintenance ENS 478002012-04-03T09:24:0003 April 2012 09:24:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Spds and Erds Removed from Service for Planned Maintenance ENS 475942012-01-14T12:00:00014 January 2012 12:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System Removed from Service for Maintenance ENS 475302011-12-16T15:17:00016 December 2011 15:17:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Safety Parameter Display System and Emergency Response Data System ENS 464362010-11-24T20:15:00024 November 2010 20:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System and Emergency Response Data System Out of Service for Planned Maintenance ENS 463882010-11-03T16:35:0003 November 2010 16:35:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Spds and Erds Removed from Service for Maintenance ENS 459002010-05-05T09:00:0005 May 2010 09:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Out of Service for Preventive Maintenance ENS 455302009-12-01T17:00:0001 December 2009 17:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Ipcs System Oos for Security Modification ENS 455122009-11-21T10:00:00021 November 2009 10:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Out of Service Due to Planned Electrical Maintenance ENS 452872009-08-24T13:00:00024 August 2009 13:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Eof Backup Diesel Failure and Eof Outage ENS 452302009-07-27T13:35:00027 July 2009 13:35:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Temporarily Unavailable for Use ENS 449992009-04-20T03:15:00020 April 2009 03:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System and Emergency Response Data System Out of Service for Planned Maintenance ENS 449842009-04-11T16:10:00011 April 2009 16:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Assessment Capability - Technical Support Center Ventilation Unavailable ENS 449682009-04-03T20:30:0003 April 2009 20:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Maintenance on Spds and Erds ENS 448242009-02-02T19:00:0002 February 2009 19:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Non-Functional ENS 445652008-10-14T09:00:00014 October 2008 09:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Removed from Operation for Maintenance ENS 442802008-06-10T00:07:00010 June 2008 00:07:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Operations Facility Power Outage ENS 437682007-11-03T21:22:0003 November 2007 21:22:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Spds and Erds Due to Planned Maintenance ENS 435652007-08-14T16:51:00014 August 2007 16:51:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Unavailable for Emergency Use ENS 431782007-02-21T18:30:00021 February 2007 18:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Alternate Eof Unavailable ENS 431712007-02-19T13:00:00019 February 2007 13:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Eof Not Available During Renovation ENS 424822006-04-07T21:07:0007 April 2006 21:07:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Offsite Communication Capability - Planned Maintenance on Spds and Erds Systems ENS 422462006-01-10T16:00:00010 January 2006 16:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Ens and Commercial Line Communication Due to Fiber Optic Line Break ENS 411772004-11-07T11:20:0007 November 2004 11:20:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Spds and Erds Due to Planned Maintenance 2024-09-16T17:29:00 | |
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