ENS 43837
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ENS Event | |
|---|---|
19:05 Dec 11, 2007 | |
| Title | Major Loss of Communications Capability |
| Event Description | On Tuesday, December 11, 2007, at approximately 1105 PST, the San Onofre Nuclear Generating Station Control Room Red Phone and commercial telephone systems became inoperable for approximately 10 minutes. Control Room Red Phone operability was confirmed by a successful call to NRC Headquarters Operation Office about 1115 PST.
Southern California Edison is reporting this event in accordance with 10CFR50.72(b)(3)(xiii) for a condition that resulted in a major loss of offsite communications capability (Emergency Notification System and offsite notification system). As part of the problem solving efforts, the Red Phone may become inoperable for brief periods of time. At the time of this report, Unit 2 is in Mode 6 in a refueling outage and Unit 3 is in Mode 1 at 100 percent power. The NRC Senior Resident Inspector has been notified of this event and provided a copy of this report. The licensee still had satellite phone communications capability. |
| Where | |
|---|---|
San Onofre  California (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-1.2 h-0.05 days <br />-0.00714 weeks <br />-0.00164 months <br />) | |
| Opened: | Susan Gardner 17:53 Dec 11, 2007 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Dec 11, 2007 |
| 43837 - NRC Website
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Unit 3 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 475502011-12-23T13:00:00023 December 2011 13:00:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System Out of Service ENS 467112011-03-30T14:00:00030 March 2011 14:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Sirens Out of Service Due to Inadvertent Securing of Power ENS 465032010-12-22T03:32:00022 December 2010 03:32:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Access to Primary Emergency Operations Facility Not Possible Due to Road Flooding ENS 457142010-02-21T16:00:00021 February 2010 16:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Power Outage at Primary Emergency Operations Facility (Eof) ENS 456342010-01-19T03:50:00019 January 2010 03:50:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Operations Facility Inaccessible Due to Road Flooding ENS 454622009-10-23T19:05:00023 October 2009 19:05:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Preparedness Capabilities ENS 452052009-07-13T18:00:00013 July 2009 18:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Temporary Loss of Power to Ten Emergency Notification Sirens ENS 443552008-07-18T15:00:00018 July 2008 15:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Operations Facility Inoperable for Maintenance Work ENS 442512008-05-30T22:05:00030 May 2008 22:05:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Power Outage at Primary Emergency Operations Facility (Eof) ENS 438372007-12-11T19:05:00011 December 2007 19:05:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Major Loss of Communications Capability ENS 419582005-08-29T17:45:00029 August 2005 17:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System and Emergency Response Data System Planned Upgrade Outage ENS 414772005-03-09T08:00:0009 March 2005 08:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Loss of the Emergency Response Data System ENS 413202005-01-10T03:45:00010 January 2005 03:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness San Onofre Emergency Operations (Eof) Inaccessible Due to Road Flooding 2011-03-30T14:00:00 | |
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