ENS 47241
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ENS Event | |
|---|---|
08:03 Sep 5, 2011 | |
| Title | Loss of Meterological Tower Vertical Temperature Difference Instrumentation Due to Lightning Strike |
| Event Description | On 9/5/11 at 0403 EDT, Vermont Yankee Nuclear Power Station experienced a lightning strike which resulted in a loss of all vertical temperature difference instrumentation.
This condition is being reported as a loss of emergency assessment capability in accordance with 10CFR50.72(b)(3)(xiii) Procedure OPOP-PHEN-3127, Natural Phenomena, was entered and the lightning damage indicator walkdown checklist was performed with no additional damage found. Several other spurious alarms were received at the time of the lightning strike and are being investigated. None of these alarms indicate any other potentially reportable conditions. The plant is continuing normal power operation at approximately 98 percent rated thermal power. The NRC Resident Inspector has been informed. The licensee reports that repairs are currently underway. |
| Where | |
|---|---|
Vermont Yankee  Vermont (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+1.62 h0.0675 days <br />0.00964 weeks <br />0.00222 months <br />) | |
| Opened: | James Kritzer 09:40 Sep 5, 2011 |
| NRC Officer: | Donald Norwood |
| Last Updated: | Sep 5, 2011 |
| 47241 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (98 %) |
| After | Power Operation (98 %) |
WEEKMONTHYEARENS 491092013-06-12T20:38:00012 June 2013 20:38:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Tone Alert System Failure ENS 472412011-09-05T08:03:0005 September 2011 08:03:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Meterological Tower Vertical Temperature Difference Instrumentation Due to Lightning Strike ENS 460692010-07-04T23:30:0004 July 2010 23:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Problem with Tone Alert System ENS 459582010-05-27T06:00:00027 May 2010 06:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Communications ENS 447282008-12-18T13:45:00018 December 2008 13:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Tone Alert Radio Input Out of Service ENS 445302008-09-30T23:42:00030 September 2008 23:42:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Primary Offsite Notification Capability ENS 441182008-04-03T18:00:0003 April 2008 18:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Ability to Telephone Out of State ENS 440422008-03-07T15:45:0007 March 2008 15:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Telephone Outage Onsite ENS 435732007-08-17T13:55:00017 August 2007 13:55:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Weather Alert System Was Inoperable ENS 434092007-06-06T17:17:0006 June 2007 17:17:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Public Notification System Inoperable ENS 429442006-10-29T17:02:00029 October 2006 17:02:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Noaa Transmitter ENS 427552006-08-08T20:45:0008 August 2006 20:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Response Radio Alert System Transmitter ENS 408872004-07-21T15:20:00021 July 2004 15:20:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Public Notification System Due to Loss of Normal and Emergency Power Supply 2013-06-12T20:38:00 | |
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