ENS 47670
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ENS Event | |
|---|---|
18:42 Feb 16, 2012 | |
| Title | Loss of Spds Greater than Eight (8) Hours Due to Hard Drive Failure |
| Event Description | At approximately 0542 hours0.00627 days <br />0.151 hours <br />8.96164e-4 weeks <br />2.06231e-4 months <br /> [EST], the Safety Parameter Display System (SPDS) became non-functional, and therefore was not available in the Control Room or in the emergency response facilities. Efforts are underway to restore the system, but as of 1342 hours0.0155 days <br />0.373 hours <br />0.00222 weeks <br />5.10631e-4 months <br /> [EST] these efforts have not been successful. The loss of SPDS for more than 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> is being reported in accordance with 10 CFR 50.72(b)(3)(xiii). Troubleshooting efforts continue to restore the SPDS. The Emergency Response Data System (ERDS) remains functional, and the station remains capable of performing dose assessment using manual inputs per site procedures. The Control Room also continues to have the capability to retrieve plant data inputs to assess plant conditions and perform core damage assessments.
The NRC Senior Resident Inspector has been notified, and the State of Ohio Emergency Management Agency will be notified.
As of 2100 EST on 02/16/12 the SPDS has been restored to service and is functioning properly. The licensee will inform the NRC Resident Inspector. Notified R3DO (Passehl). |
| Where | |
|---|---|
Davis Besse  Ohio (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-3.65 h-0.152 days <br />-0.0217 weeks <br />-0.005 months <br />) | |
| Opened: | Tom Phillips 15:03 Feb 16, 2012 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Feb 16, 2012 |
| 47670 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 501432014-05-26T06:52:00026 May 2014 06:52:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Control Room Overhead Annunciator Malfunction ENS 502522014-05-21T07:36:00021 May 2014 07:36:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Control Room Overhead Annunciator Malfunction ENS 495462013-11-17T17:33:00017 November 2013 17:33:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness All Control Room Annunciators in Alarm ENS 476702012-02-16T18:42:00016 February 2012 18:42:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Spds Greater than Eight (8) Hours Due to Hard Drive Failure ENS 432922007-04-09T11:30:0009 April 2007 11:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Seismic Monitoring System Out of Service ENS 431642007-02-14T01:12:00014 February 2007 01:12:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Offsite Communications Capability Due to a Power Outage in Toledo, Ohio ENS 412862004-12-23T11:14:00023 December 2004 11:14:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Response Capability ENS 407342004-05-07T16:00:0007 May 2004 16:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Preparedness Capability Due to Inability to Activate Sirens 2014-05-26T06:52:00 | |
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