ENS 45672
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ENS Event | |
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20:00 Feb 2, 2010 | |
Title | Primary Eof Unavailable Due to Failure of Ventilation Damper Position Indication |
Event Description | On February 2, 2010, at approximately 1400 CST, Entergy personnel manually switched the Emergency Operations Facility (EOF) Ventilation System Panel to the isolation mode. This manual switching to the isolation mode will cause the isolation dampers to close and the movement of the dampers closing can normally be heard. An indication light on the ventilation panel will illuminate when the dampers close. For the manual isolation on February 2, 2010, these indications did not occur. Waterford 3 personnel have made a judgment that the isolation dampers may not be closed due the lack of the aforementioned indications. The EOF ventilation system is not able to perform its isolation function if the dampers are not closed. The ventilation system and associated dampers are designed to provide protection from radiological and toxic chemical release. This report is being made because the time to restore the ventilation system to functional status is indeterminate at this time, until the actual condition of the ventilation system can be established.
The back up EOF facility is judged to be functional based on January 12, 2010 communications check and facility readiness verifications on January 28, 2010. The licensee informed the NRC Resident Inspector. |
Where | |
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Waterford Louisiana (NRC Region 4) | |
Reporting | |
10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
Time - Person (Reporting Time:+0.62 h0.0258 days <br />0.00369 weeks <br />8.49276e-4 months <br />) | |
Opened: | Joe Williams 20:37 Feb 2, 2010 |
NRC Officer: | Mark Abramovitz |
Last Updated: | Feb 2, 2010 |
45672 - NRC Website | |
Unit 3 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
WEEKMONTHYEARENS 554432021-08-31T18:40:00031 August 2021 18:40:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Communications Capability ENS 530572017-11-07T09:37:0007 November 2017 09:37:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Inbound Commercial Lines and Fts Lines to Facility ENS 512952015-08-06T17:00:0006 August 2015 17:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Non-Functional Emergency Sirens ENS 499782014-03-31T20:58:00031 March 2014 20:58:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Six Emergency Sirens ENS 499252014-03-17T12:37:00017 March 2014 12:37:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Sirens ENS 482552012-08-30T11:20:00030 August 2012 11:20:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Operations Facility and Emergency Notification System Phone Out of Service ENS 482512012-08-29T20:30:00029 August 2012 20:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Evacuation Route Unavailable Due to Flooding from Hurricane Isaac ENS 456722010-02-02T20:00:0002 February 2010 20:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Primary Eof Unavailable Due to Failure of Ventilation Damper Position Indication ENS 426722006-06-28T19:15:00028 June 2006 19:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss and Subsequent Restoration of Electrical Power to the Emergency Operations Facility 2021-08-31T18:40:00 | |
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