ENS 46013
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ENS Event | |
|---|---|
12:59 Jun 16, 2010 | |
| Title | Early Warning System Found Non-Responsive During Testing |
| Event Description | During performance of the Early Warning System (EWS) Polling Function Test the sirens did not respond. At 0859 hours0.00994 days <br />0.239 hours <br />0.00142 weeks <br />3.268495e-4 months <br /> [EDT] on June 16, 2010, the polling function test of the sirens was started. After four (4) sirens did not respond to the polling, the test was suspended and the Telecommunications group was notified. With Telecommunications monitoring the EWS primary base radio, the polling function test was run again. It was determined the audio signals from the status logger were being transmitted to the EWS primary base radio, however, the radio was not keying or transmitting the audio signal to the sirens. A check of the keying signal from the processor to the primary base radio was noted to be operating properly, however, the primary base radio was still not transmitting the audio signal to the sirens. Therefore, activation of the EWS by the state or local agencies would not have been possible. At 0925 hours0.0107 days <br />0.257 hours <br />0.00153 weeks <br />3.519625e-4 months <br />, the EWS was switched to the back-up radio base station and tested satisfactory for proper radio function. The polling function test was performed with all 68 sirens responding as designed. All 68 sirens polled satisfactory during the last performance of the EWS Polling Function Test on June 2, 2010.
The licensee has notified the State and the NRC Resident Inspector. Local agencies will also be informed. |
| Where | |
|---|---|
North Anna  Virginia (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+0.65 h0.0271 days <br />0.00387 weeks <br />8.9037e-4 months <br />) | |
| Opened: | Michael Whalen 13:38 Jun 16, 2010 |
| NRC Officer: | Bill Huffman |
| Last Updated: | Jun 16, 2010 |
| 46013 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (98 %) |
| After | Power Operation (98 %) |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (98 %) |
| After | Power Operation (98 %) |
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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