ENS Event | |
|---|---|
11:15 Dec 31, 2004 | |
| Title | Loss of Emergency Notification Sirens |
| Event Description | Loss of 21 emergency notification sirens due to a loss of power. A rain storm in San Luis Obispo county resulted in a loss of a local substation. This substation supplies power to 21 of [over 400] emergency sirens. Investigation and repair of the substation is in progress.
This siren outage eliminates emergency notification siren coverage in one specific area. The local sheriff department has been notified to implement alternate notification protocols until the sirens in that area are operable. The licensee will notify the NRC Resident Inspector.
Power was restored to the substation and the 21 affected emergency notification sirens have been returned to service. The licensee will notify the NRC Resident Inspector. Notified R4 DO (T. Farnholtz).
Correction: Total number of emergency sirens at Diablo Canyon site is 131 sirens not 400 sirens. R4DO (Linda Smith) notified. The NRC Resident Inspector was notified of this update. |
| Where | |
|---|---|
Diablo Canyon  California (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-4.8 h-0.2 days <br />-0.0286 weeks <br />-0.00658 months <br />) | |
| Opened: | Joy Skaggs 06:27 Dec 31, 2004 |
| NRC Officer: | Jeff Rotton |
| Last Updated: | Jan 3, 2005 |
| 41302 - NRC Website
Loading map... | |
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 533612018-04-24T10:57:00024 April 2018 10:57:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Containment Radiation Monitors Inoperable ENS 493342013-09-09T20:00:0009 September 2013 20:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Partial Loss of Communications Capability in Technical Support Center ENS 491732013-07-03T07:00:0003 July 2013 07:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Response Communications Due to a Loss of Ancillary Power ENS 487862013-02-27T00:30:00027 February 2013 00:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Assessment Capability Due to Vital Inverter Maintenance ENS 486002012-12-18T02:04:00018 December 2012 02:04:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Plant Vent Continuous Radiation Monitors Inoperable ENS 483392012-09-25T12:55:00025 September 2012 12:55:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Removed from Service for Maintenance ENS 481712012-08-09T17:00:0009 August 2012 17:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Operations Facility Data Network Maintenance ENS 443052008-06-19T03:15:00019 June 2008 03:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Meteorlogical Mixing Calculations Unavailable ENS 426402006-06-14T16:41:00014 June 2006 16:41:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Erds Inoperable ENS 413022004-12-31T11:15:00031 December 2004 11:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Notification Sirens 2018-04-24T10:57:00 | |