ENS 40820
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ENS Event | |
|---|---|
13:45 Jun 16, 2004 | |
| Title | Loss of Emergency Assessment Capability |
| Event Description | At 0945 on 6/16/04, the uninterruptible power supply to the Technical Support Center was removed from service for pre-planned maintenance. As a result, the plant Safety Parameter Display System (SPDS) and the Technical Support Center (TSC) computer system are inoperable. This event is a major loss of emergency assessment capability and is reportable under 10CFR50.72(b)(3)(xiii). The expected duration of the maintenance is between 4 and 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
This pre-planned maintenance also made the ERDS inoperable. The Licensee has notified the NRC Resident Inspector.
SPDS and the TSC computer were returned to service at 17:04 on 06/16/04. The NRC Resident Inspector will be returned to service. |
| Where | |
|---|---|
North Anna  Virginia (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-3.57 h-0.149 days <br />-0.0212 weeks <br />-0.00489 months <br />) | |
| Opened: | Mike Guill 10:11 Jun 16, 2004 |
| NRC Officer: | Jeff Rotton |
| Last Updated: | Jun 16, 2004 |
| 40820 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 515572015-11-20T13:23:00020 November 2015 13:23:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Inoperable Vent Stack Radiation Monitor ENS 496722013-12-23T13:23:00023 December 2013 13:23:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Communications with Virginia State Eoc Due to Power Outage ENS 467512011-04-14T08:00:00014 April 2011 08:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation System Out of Service for Maintenance ENS 466762011-03-15T15:31:00015 March 2011 15:31:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Power to Technical Support Center Ventilation System ENS 460392010-06-23T13:10:00023 June 2010 13:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Early Warning Siren Test Failure ENS 460132010-06-16T12:59:00016 June 2010 12:59:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Early Warning System Found Non-Responsive During Testing ENS 435462007-08-03T12:55:0003 August 2007 12:55:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System (Spds) Out of Service ENS 424432006-03-22T17:51:00022 March 2006 17:51:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Potential Loss of Communication Sirens ENS 420972005-10-30T05:50:00030 October 2005 05:50:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Spds Unavailable for Greater than One Hour ENS 419002005-08-07T04:00:0007 August 2005 04:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Spds Unavailable for Greater than One Hour ENS 414562005-03-02T17:39:0002 March 2005 17:39:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Sirens ENS 414262005-02-21T07:50:00021 February 2005 07:50:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System Inoperable for Greater than One Hour ENS 408202004-06-16T13:45:00016 June 2004 13:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Assessment Capability ENS 401792003-09-19T13:30:00019 September 2003 13:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Siren Capability to the Adverse Weather Conditions 2015-11-20T13:23:00 | |
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