ENS 48289
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ENS Event | |
|---|---|
16:30 Sep 8, 2012 | |
| Title | Historical Technical Support Center Ventilation Evaluation Deficiency |
| Event Description | FPL (Florida Power & Light) previously reported (EN 47819) that a portion of the Turkey Point Technical Support Center (TSC) Heating Ventilation and Air Conditioning System (HVAC) was deenergized for maintenance during two extended periods. FPL concluded that due to the condition, the TSC may not have been fully functional under every postulated design basis accident scenario. As a result of further investigation, FPL has been unable to validate the historical TSC design basis assumptions for habitability for an indeterminate period in the past. Among the issues identified include (a) seized HVAC isolation damper, (b) unsecured HVAC balancing damper, and (c) voids in the concrete shield wall. Additionally, while the original design basis did not provide for any unfiltered air inleakage, the HVAC system was constructed and maintained to ensure only that a positive pressure could be achieved.
FPL has addressed the TSC issues. A new dose analysis and recent tracer gas test have established TSC compliance with the current licensing basis. Therefore, the TSC is fully functional at this time. This report is made for historical conditions in accordance with 10 CFR 50.72(b)(3)(xiii). The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Turkey Point  Florida (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-3.3 h-0.138 days <br />-0.0196 weeks <br />-0.00452 months <br />) | |
| Opened: | Keith Maestas 13:12 Sep 8, 2012 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Sep 8, 2012 |
| 48289 - NRC Website
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Unit 3 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (12 %) |
| After | Power Operation (12 %) |
Unit 4 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 507892015-02-05T16:30:0005 February 2015 16:30:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation Non-Functional ENS 506682014-12-11T13:00:00011 December 2014 13:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Maintenance on the Technical Support Center ENS 502172014-06-20T12:15:00020 June 2014 12:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Out of Service for Maintenance ENS 499272014-03-17T14:18:00017 March 2014 14:18:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Habitabilty Impacted Due to Loss of Air Conditioning ENS 498612014-02-27T17:22:00027 February 2014 17:22:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Degradation of the Technical Support Center Ventilation System ENS 496522013-12-18T18:00:00018 December 2013 18:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Inoperable for Planned Maintenance ENS 496462013-12-17T15:50:00017 December 2013 15:50:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Degraded Due to Loss of Air Filtration ENS 488522013-03-26T10:20:00026 March 2013 10:20:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Tsc Emergency Ventilation System Control Switch Discovered in the Off Position ENS 485862012-12-13T13:55:00013 December 2012 13:55:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation System Removed from Service for Maintenance ENS 485172012-11-18T01:00:00018 November 2012 01:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Auto-Initiation Feature of Technical Support Center Ventilation Improperly Inhibited ENS 482892012-09-08T16:30:0008 September 2012 16:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Historical Technical Support Center Ventilation Evaluation Deficiency ENS 482342012-08-27T04:00:00027 August 2012 04:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation Maintenance ENS 480962012-07-12T09:00:00012 July 2012 09:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Tsc Ventilation System Due to Scheduled Maintenance ENS 474992011-12-06T14:30:0006 December 2011 14:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Non-Functional Due to Planned Maintenance ENS 473872011-10-28T18:30:00028 October 2011 18:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Tsc Unavailable for Emergency Conditions ENS 473422011-10-13T15:50:00013 October 2011 15:50:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System Inoperable ENS 478192010-12-04T04:00:0004 December 2010 04:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Habitability Requirement Not Met Due to Maintenance on the Tsc ENS 460412010-06-23T16:51:00023 June 2010 16:51:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unit 3 Emergency Response Data System Declared Inoperable ENS 452182009-07-21T13:30:00021 July 2009 13:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Ability to Activate Emergency Sirens Temporarily Lost ENS 449762009-04-08T03:45:0008 April 2009 03:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Erds Due to Equipment Failure ENS 441352008-04-12T19:00:00012 April 2008 19:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Modification to Process Computer That Will Impact Erds ENS 440682008-03-16T18:30:00016 March 2008 18:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Plant Process Computer System Erdads ENS 440472008-03-08T00:14:0008 March 2008 00:14:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Intermittent Operation of Emergency Response Data System ENS 440282008-03-04T13:16:0004 March 2008 13:16:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Erds Link Determined Inoperable for 3 Hour Period ENS 439362008-01-27T20:17:00027 January 2008 20:17:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System Link to Nrc Unavailable ENS 439242008-01-23T05:10:00023 January 2008 05:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System Unavailable ENS 439022008-01-13T14:44:00013 January 2008 14:44:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Intermittent Plant Computer Failures ENS 438872008-01-09T21:30:0009 January 2008 21:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Erds Failed to Disconnect During Test ENS 438772008-01-01T02:10:0001 January 2008 02:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Erdads Failure for Seventy Minutes ENS 438032007-11-21T16:15:00021 November 2007 16:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Erdads Long Term Historian Data Stream Was Not Updating ENS 437982007-11-21T08:30:00021 November 2007 08:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Erdads Computer System Failure ENS 437052007-10-10T04:00:00010 October 2007 04:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Erdads and Erds Link ENS 436142007-09-05T15:17:0005 September 2007 15:17:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Modification to Process Computer That Impact Erds and Spds ENS 421892005-12-08T18:41:0008 December 2005 18:41:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Response Data System Due to Planned Software Modification ENS 421482005-11-17T05:47:00017 November 2005 05:47:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss and Subsequent Recovery of Emergency Response Data System ENS 420752005-10-25T14:00:00025 October 2005 14:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Communication by Front End Processor and Spare Train to Fts-2001 Communications Link 2015-02-05T16:30:00 | |
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