ENS Event | |
|---|---|
17:33 Nov 17, 2013 | |
| Title | All Control Room Annunciators in Alarm |
| Event Description | A station annunciator system malfunction caused all Control Room annunciator indications to be in alarm status. This condition resulted in a loss of normal audible and visual plant condition assessment capabilities and was assessed as being a significant loss of assessment capabilities. Backup assessment capability existed and was dependent upon redundant assets as described in existing station documentation and/or functionality of the Control Room Alarm Typer.
At 1659 EST full annunciator capability was restored following cleaning of a disconnect switch. The NRC Resident Inspector has been notified." State and local officials will be notified. |
| Where | |
|---|---|
Davis Besse  Ohio (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+1.9 h0.0792 days <br />0.0113 weeks <br />0.0026 months <br />) | |
| Opened: | Thomas Phillips 19:27 Nov 17, 2013 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Nov 17, 2013 |
| 49546 - NRC Website
Loading map... | |
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 | |