ENS 40818
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ENS Event | |
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14:41 Jun 14, 2004 | |
Title | Licensee Declared Offsite Power Inoperable Due to Dip in Grid Frequency |
Event Description | On June 14, 2004 at 0741 PDT, the offsite power grid connected to San Onofre experienced a system disturbance. Grid frequency dipped to about 59.7 Hz or slightly lower, and then recovered about three minutes later. Plant Operators declared offsite power inoperable. Southern California Edison is conservatively reporting this event in accordance with 10 CFR 50.72(b)(3)(v)(D). The diesel generators for both Units 2 and 3 were operable during this event. At the time of this report, Units 2 and 3 continue to operate at about 100% power.
The NRC Resident Inspector was notified. NOTE: see events 40814, 40815 and 40816 |
Where | |
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San Onofre California (NRC Region 4) | |
Reporting | |
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
Time - Person (Reporting Time:+2.55 h0.106 days <br />0.0152 weeks <br />0.00349 months <br />) | |
Opened: | Clay Williams 17:14 Jun 14, 2004 |
NRC Officer: | Chauncey Gould |
Last Updated: | Jun 14, 2004 |
40818 - NRC Website
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Unit 2 | |
---|---|
Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
Unit 3 | |
---|---|
Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
San Onofre with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
WEEKMONTHYEARENS 456282010-01-13T19:25:00013 January 2010 19:25:00
[Table view]10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Wrong Train of Emergency Core Cooling System Removed from Service ENS 442472008-05-29T18:36:00029 May 2008 18:36:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Offsite Power Below 59.7 Hz ENS 442272008-05-20T20:10:00020 May 2008 20:10:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Offsite Power Grid Disturbance ENS 423102006-02-04T02:15:0004 February 2006 02:15:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Offsite Power Not within Specifications ENS 417982005-06-26T11:17:00026 June 2005 11:17:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Edg Inoperable Due to Loose Electrical Connection ENS 408182004-06-14T14:41:00014 June 2004 14:41:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident Licensee Declared Offsite Power Inoperable Due to Dip in Grid Frequency 2010-01-13T19:25:00 | |
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