ENS 45836
ENS Event | |
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10:01 Apr 13, 2010 | |
Title | Technical Support Center Ventilation System Out of Service |
Event Description | During routine testing of the Technical Support Center (TSC) ventilation system, the charcoal filter emergency supply fan did not start as required. As a result, under certain accident conditions, the TSC may become uninhabitable because of the inability of the charcoal filtration unit to maintain environmental conditions within limits.
If an emergency is declared requiring TSC activation during this period, the TSC will be staffed and activated using existing emergency planning procedures unless the TSC becomes uninhabitable due to radiological or other conditions. If relocation of the TSC becomes necessary, Operational Support Center (OSC) and TSC personnel will relocate to an alternate TSC location in accordance with applicable site procedures with primary TSC and OSC positions reporting to the Main Control Room (which is capable of supporting the additional personnel). This notification is being made in accordance with 10CFR50.72(b)(3)(xiii) due to the potential loss of an Emergency Response Facility (ERF). Troubleshooting is in progress to determine the cause of the equipment failure. An update will be provided once the TSC ventilation has been restored to normal operation. The NRC Resident Inspector has been notified.
The failure of the fan to start was caused by loose linkages for a limit switch. The problem has been repaired and the TSC has been returned to service. The NRC Resident Inspector has been informed. Informed R4DO (Spitzberg). |
Where | |
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River Bend Louisiana (NRC Region 4) | |
Reporting | |
10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
Time - Person (Reporting Time:+2.18 h0.0908 days <br />0.013 weeks <br />0.00299 months <br />) | |
Opened: | Tim Gates 12:12 Apr 13, 2010 |
NRC Officer: | Dong Park |
Last Updated: | Apr 13, 2010 |
45836 - NRC Website
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Unit 1 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
WEEKMONTHYEARENS 491222013-06-16T09:56:00016 June 2013 09:56:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Broken Damper Blade Linkage Found on Technical Support Center Ventilation Line ENS 485552012-12-04T15:42:0004 December 2012 15:42:00 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 Licensee No Longer Has Control of Emergency Sirens ENS 479952012-06-05T10:02:0005 June 2012 10:02:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Filter Train Inoperable ENS 479602012-05-24T18:48:00024 May 2012 18:48:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation, 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Manual Reactor Scram Due to a Loss of Feed as Result of a Loss of Switchgear ENS 458362010-04-13T10:01:00013 April 2010 10:01:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation System Out of Service ENS 440132008-02-28T18:38:00028 February 2008 18:38:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness "Planned Maintenance on Safety Parameter Display System (Spds) and Emergency Response Data System (Erds) ENS 439522008-02-01T19:45:0001 February 2008 19:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Scheduled Loss of All Main Control Room Annunciators to Support Plant Maintenance ENS 439112008-01-17T15:17:00017 January 2008 15:17:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Control Room Annunciators Removed from Service for Planned Maintenance ENS 439042008-01-14T22:10:00014 January 2008 22:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Loss of Main Control Room Annunciator System ENS 439012008-01-13T16:36:00013 January 2008 16:36:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Assessment Capabilities Due to Planned Maintenance Activities 2013-06-16T09:56:00 | |