ENS 45929
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ENS Event | |
|---|---|
19:30 May 14, 2010 | |
| Title | Technical Support Center Nonfunctional |
| Event Description | At 1530 on May 14th, 2010, Three Mile Islands Technical Support Center (TSC) ventilation, filtration and climate control system was identified as nonfunctional. Site emergency implementation procedures provide direction for performance of TSC functions in alternate locations. This failure affects the ability of the TSC ventilation to maintain adequate radiological habitability in the event of an emergency with an airborne radiological release. All other capabilities of the TSC are unaffected by this emergent condition. This condition is considered a major loss of emergency assessment capability and is reportable under 10CFR50.72(b)(3)(xiii).
The NRC Resident Inspector has been notified.
The TSC ventilation system has been repaired and is fully functional as of 1100 on May 15, 2010. The NRC Resident Inspector has been notified. Notified R1DO(Miller). |
| Where | |
|---|---|
Three Mile Island  Pennsylvania (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-1.57 h-0.0654 days <br />-0.00935 weeks <br />-0.00215 months <br />) | |
| Opened: | Thomas Haaf 17:56 May 14, 2010 |
| NRC Officer: | Charles Teal |
| Last Updated: | May 18, 2010 |
| 45929 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 520972016-07-18T20:00:00018 July 2016 20:00:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Offsite Communications Capability ENS 509322015-03-27T17:00:00027 March 2015 17:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Seismic Monitor Not Available for Emergency Plan Assessment ENS 488552013-03-27T12:00:00027 March 2013 12:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation Out of Service for Maintenance ENS 487142013-02-05T13:00:0005 February 2013 13:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation System Out of Service ENS 486252012-12-26T09:10:00026 December 2012 09:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation System Out of Service ENS 474192011-11-07T01:03:0007 November 2011 01:03:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Spds and Plant Process Computer Due to Planned Maintenance ENS 473902011-10-29T23:18:00029 October 2011 23:18:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Greater than 25% of Emergency Notification System Sirens Due to Weather Conditions ENS 470312011-07-06T18:40:0006 July 2011 18:40:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center (Tsc) Hvac Out of Service Due to Loss of Power ENS 459292010-05-14T19:30:00014 May 2010 19:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Nonfunctional ENS 453592009-09-17T17:00:00017 September 2009 17:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System Inoperable for Greater than Eight Hours ENS 452312009-07-27T14:00:00027 July 2009 14:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center (Tsc) Hvac Found Degraded Due to Water Intrusion ENS 437722007-11-05T21:49:0005 November 2007 21:49:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Spds Out of Service for Planned Maintenance ENS 437602007-10-31T03:30:00031 October 2007 03:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Outage of Safety Parameter Display System (Spds) and Emergency Response Data ENS 424132006-03-13T16:10:00013 March 2006 16:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation Fan Inoperable ENS 401782003-09-19T06:24:00019 September 2003 06:24:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Siren Capability Due to Adverse Weather Conditions ENS 401212003-08-29T19:05:00029 August 2003 19:05:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Degradation of Emergency Preparedness Response Capabilities 2016-07-18T20:00:00 | |
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