ENS 40258
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ENS Event | |
|---|---|
07:52 Oct 18, 2003 | |
| Title | Earthquake Felt on Site. Entered Emergency Action Level (Eal) 18 |
| Event Description | Earthquake felt on plant site measured at 0.02g. Both Units remain at 100%
State and Local County notified by the licensee. Unusual Event declared per EAL 18, (greater than 0.01g) . Two jolts several minutes apart were felt in the Control Room. The electrical grid is stable, all Emergency Core Cooling Systems and all Emergency Diesel Generators are fully operable if needed. Licensee will perform walkdowns of the plant to check for any damage. Turbine supervisor system indicated high main turbine bearing vibration on both main turbines (cleared right away) and one of the Unit 1 Accumulator levels alarmed (also cleared right away). Following information from Earthquake Center located in Colorado: Two earthquakes both magnitude 3.4, located 10 miles Southwest of San Luis Obispo. First earthquake occurred at 0027 PDT and the other earthquake occurred at 0039 PDT. The NRC Resident Inspector will be notified.
EAL 18 exited and Unusual Event Classification terminated at 0330 PDT. Walkdown of plant completed with no damage to plant observed. R4D0 (G. Sanborn), HQPAO (Gagner), FEMA (Austin), DHS (V. Cates), DIRO (S. Frant), & (G. Holahan) notified. NRC Resident Inspector informed by licensee. |
| Where | |
|---|---|
Diablo Canyon  California (NRC Region 4) | |
| Reporting | |
| Emergency class: | Unusual Event |
| 10 CFR 50.72(a) (1) (i), Emergency Class Declaration | |
| Time - Person (Reporting Time:+-3.8 h-0.158 days <br />-0.0226 weeks <br />-0.00521 months <br />) | |
| Opened: | Chitwood 04:04 Oct 18, 2003 |
| NRC Officer: | John Mackinnon |
| Last Updated: | Oct 18, 2003 |
| 40258 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 528762017-07-28T19:06:00028 July 2017 19:06:00
[Table view]10 CFR 50.72(a)(1)(i), Emergency Class Declaration Alert Declared Due to Low Oxygen Levels Inside Containment ENS 516552016-01-14T22:43:00014 January 2016 22:43:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notification of Unusual Event - Security Condition That Does Not Involve Hostile Action ENS 484272012-10-21T07:09:00021 October 2012 07:09:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Seismic Event ENS 466682011-03-11T09:23:00011 March 2011 09:23:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notice of Unusual Event as a Result of a Tsunami Warning in the Area ENS 465092010-12-26T00:25:00026 December 2010 00:25:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notification of Unusual Event Declared Due to High Winds ENS 460362010-06-23T17:48:00023 June 2010 17:48:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Alert Declared for a Cardox Discharge in the Turbine Building ENS 459922010-06-09T18:12:0009 June 2010 18:12:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Toxic Gas/Chemical Spill in the Protected Area ENS 451122009-06-02T08:22:0002 June 2009 08:22:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event - Smoke Alarm in Protected Area Lasting Greater than 15 Minutes ENS 444192008-08-17T07:12:00017 August 2008 07:12:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Unusual Event Declared Due to Fire in Main Bank Tranformer ENS 443572008-07-21T16:08:00021 July 2008 16:08:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared - Unable to Validate a Fire Alarm within 15 Minutes ENS 430472006-12-12T21:22:00012 December 2006 21:22:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Circulating Water Pump Failure Causes Explosion in Intake Structure ENS 417742005-06-15T03:50:00015 June 2005 03:50:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notification of Unusual Event Due to Tsunami Warning ENS 410762004-09-28T17:30:00028 September 2004 17:30:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Seismic Activity ENS 404082003-12-22T19:22:00022 December 2003 19:22:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notification of Unusual Event - Earthquake ENS 402582003-10-18T07:52:00018 October 2003 07:52:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Earthquake Felt on Site. Entered Emergency Action Level (Eal) 18 2017-07-28T19:06:00 | |
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