ENS 48391
ENS Event | |
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14:57 Oct 9, 2012 | |
Title | Loss of Assessment Capability at the Emergency Operations Facility |
Event Description | At approximately 0100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> EDT, on October 9, 2012, a low voltage circuit breaker in the Crystal River Unit 3 (CR-3) Emergency Operations Facility (EOF) tripped due to an electrical fault. The associated loads were powered by backup batteries until they depleted at approximately 1057 EDT. This condition resulted in the loss of dose assessment (RASCAL) and facility cooling capability.
Dose assessment capability at the EOF was restored by 1335 EDT. During this event, RASCAL could be run from any plant computer outside of the EOF and the results conveyed back to the EOF. EOF ambient temperature is being monitored. An estimated completion time for chiller restoration has not been established. A follow-up notification will be provided when the chiller operation has been restored. This report is being made in accordance with 10 CFR 50.72(b)(3)(xiii). At no time was the public's or plant employees' health or safety at risk. Due to numerous backup systems, alternate methods were available to calculate dose projections, if required, and communicate the information to the EOF. The NRC Resident Inspector has been notified.
At 1500 EDT on 10/10/12 Chiller Operations for the EOF has been restored. At 1700 EDT on 10/10/12 the EOF returned to normal office temperatures. At no time did temperatures affect the habitability or functionality of the EOF. The NRC Resident Inspector has been informed. Notified R2DO (Seymour). |
Where | |
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Crystal River ![]() Florida (NRC Region 2) | |
Reporting | |
10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
Time - Person (Reporting Time:+1.42 h0.0592 days <br />0.00845 weeks <br />0.00195 months <br />) | |
Opened: | William Oakley 16:22 Oct 9, 2012 |
NRC Officer: | Charles Teal |
Last Updated: | Oct 10, 2012 |
48391 - NRC Website
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WEEKMONTHYEARENS 485562012-12-04T17:00:0004 December 2012 17:00:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Temporary Emergency Operating Facility Established for Planned Outage ENS 483912012-10-09T14:57:0009 October 2012 14:57:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Assessment Capability at the Emergency Operations Facility ENS 470562011-07-16T09:00:00016 July 2011 09:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Non-Functional Due to Planned Maintenance ENS 434752007-07-07T15:03:0007 July 2007 15:03:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Safety Parameter Display System (Spds) Due to Planned Modification ENS 421222005-11-06T14:35:0006 November 2005 14:35:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Temporary Loss of Offsite Notification Sirens 2012-12-04T17:00:00 | |