ENS 46254
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ENS Event | |
|---|---|
22:40 Sep 15, 2010 | |
| Title | Both Containment Hydrogen Analyzers Out of Service Due to Failed Surveillances |
| Event Description | At 1740 CDT, VA-81A, Hydrogen Analyzer Panel, was declared not functional due to failing surveillance test OP-ST-VA-0006, Containment Hydrogen Monitor Monthly Check. VA-81B, Hydrogen Analyzer Panel, was previously not functional due to performance of surveillance test IC-ST-VA-0033, 18 Month Channel Calibration of Containment Hydrogen Analyzer, VA-81B.
This results in no Hydrogen Analyzers being available to monitor containment, which prevents being able to assess for potential loss of containment barrier for Emergency Action Level purposes via the containment hydrogen greater than 3% method. USAR [Updated Safety Analysis Report] section 9.10.2.5 allows for both Hydrogen Analyzers to be out of service for up to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. The licensee informed the NRC Resident Inspector.
Fort Calhoun Station had previously reported that the loss of both hydrogen monitors on September 15, 2010, constituted a major loss of emergency response assessment capability. Additional investigation has determined that other methods of assessment were available that would have provided sufficient indication to make the proper emergency classification. Therefore, this event is being retracted. The licensee has notified the NRC Resident Inspector. Notification was sent to R4DO (Thomas Farnholtz). |
| Where | |
|---|---|
Ft Calhoun  Nebraska (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-1.67 h-0.0696 days <br />-0.00994 weeks <br />-0.00229 months <br />) | |
| Opened: | Nathan Seid 21:00 Sep 15, 2010 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Sep 29, 2010 |
| 46254 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 509452015-04-01T19:40:0001 April 2015 19:40:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Operating Facility Electrical Power and Phone System ENS 490272013-05-13T15:10:00013 May 2013 15:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Outage of Sirens Due to Scheduled Upgrades ENS 489942013-05-03T10:20:0003 May 2013 10:20:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Outage of Ft. Calhoun Station Sirens for Planned Maintenance ENS 487052013-01-29T15:00:00029 January 2013 15:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Alert Notification System Sirens Will Be Disabled for Planned Maintenance ENS 486282012-12-27T20:45:00027 December 2012 20:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Scheduled Operations Support Center (Osc) Outage for Equipment Upgrade ENS 484852012-11-07T15:00:0007 November 2012 15:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Outage of Emergency Sirens ENS 483132012-09-17T13:58:00017 September 2012 13:58:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Sirens ENS 481482012-08-01T15:10:0001 August 2012 15:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Ens, Hpn, Pmc, and Rsc Phone Lines ENS 477212012-03-06T22:13:0006 March 2012 22:13:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Sirens Due to Router Power Supply Failure ENS 476962012-02-24T04:00:00024 February 2012 04:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of 21 Out of 101 Emergency Sirens ENS 472602011-09-13T13:22:00013 September 2011 13:22:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Technical Support Center Ventilation ENS 472022011-08-26T17:36:00026 August 2011 17:36:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Unavailable for Emergency Response ENS 470332011-07-07T18:40:0007 July 2011 18:40:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Power to 10 Emergency Sirens ENS 469292011-06-06T13:00:0006 June 2011 13:00:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unusual Event Declared Due to River Level ENS 467952011-04-27T23:00:00027 April 2011 23:00:00 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 Emergency Sirens Intermittently Inoperable Due to Upgrading ENS 467422011-04-08T11:27:0008 April 2011 11:27:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Inoperable ENS 466422011-02-19T17:35:00019 February 2011 17:35:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Operations Facility (Eof) Without Power ENS 464902010-12-19T06:08:00019 December 2010 06:08:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Quickly Concluded Notice of Unusual Event Due to a Loss of Communications ENS 463242010-10-11T16:10:00011 October 2010 16:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Oos for Maintenance ENS 462542010-09-15T22:40:00015 September 2010 22:40:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Both Containment Hydrogen Analyzers Out of Service Due to Failed Surveillances ENS 458492010-04-17T01:30:00017 April 2010 01:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Inoperable Due to Hvac Failure ENS 458222010-04-08T13:30:0008 April 2010 13:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Paging System Outage ENS 457312010-02-26T14:30:00026 February 2010 14:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness In-Plant Paging System Out of Service ENS 456152010-01-08T19:29:0008 January 2010 19:29:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Sirens May Be Impacted by Extreme Weather Conditions ENS 454682009-10-26T15:50:00026 October 2009 15:50:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Station Paging System Out of Service ENS 453892009-09-29T20:09:00029 September 2009 20:09:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Unavailable for Emergency Planning Responses ENS 453152009-08-31T05:00:00031 August 2009 05:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Sirens Inoperable ENS 443232008-06-27T19:30:00027 June 2008 19:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Group Page Via Interactive Notification System Is Not Operational ENS 442072008-05-14T10:00:00014 May 2008 10:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Siren Outage for Upgrade ENS 440842008-03-20T13:13:00020 March 2008 13:13:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Traffic Accident Causes Loss of Power to Ten Emergency Sirens ENS 440362008-03-05T06:00:0005 March 2008 06:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Fifteen Emergency Sirens Inoperable for a Time ENS 439432008-01-30T09:35:00030 January 2008 09:35:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Multiple Emergency Sirens Lost Power Due to Severe Weather ENS 431812007-02-22T12:57:00022 February 2007 12:57:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System Inoperable ENS 427812006-08-17T14:00:00017 August 2006 14:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Phone Lines Out of Service for Maintenance ENS 422322005-12-27T13:30:00027 December 2005 13:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation Inoperable ENS 420062005-09-21T23:22:00021 September 2005 23:22:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Partial Loss of Emergency Siren Capability in Harrison County Iowa Due to a Transformer Fire ENS 403512003-11-24T09:22:00024 November 2003 09:22:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Inability to Initiate Emergency Sirens from Emergency Operations Facility 2015-04-01T19:40:00 | |
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