ENS 41941
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ENS Event | |
|---|---|
20:49 Aug 23, 2005 | |
| Title | Two Emergency Sirens Inoperable |
| Event Description | The following event description is based on information currently available. If through subsequent reviews of this event, additional information is identified that is pertinent to this event or alters the information being provided at this time, a follow-up notification will be made via the ENS or under the reporting requirements of 10CFR50.73.
On August 23, 2005 at approximately 13:49 Mountain Standard Time (MST), the Palo Verde Emergency Preparedness Department identified a siren (#42) inoperable due to a failed battery charger. At approximately 14:00 a faxed notice was found indicating siren #15 had failed its response check. The fax was sent approximately at 07:00 but was not noticed till later since out of service siren notifications are generally made via phone or e-mail. Upon investigation, siren #15 was found inoperable due to a circuit board failure. Siren #15 is estimated to impact approximately 144 members of population in the emergency planning zone (EPZ) within 5 miles, and siren #42 is estimated to impact 496 members of the population in the EPZ, beyond 5 miles but within 10 miles. Palo Verde's reporting criterion is a loss of capability to inform greater than 5% of the population within 5 miles and 10% of the population beyond 5 miles but within 10 miles. This call is being placed due to the relatively large segment of the population affected and the uncertainty of the length of time that will be needed to restore the siren to operable condition. The Palo Verde Emergency Plan (section 6.6.2.1) has a contingency for dispatching Maricopa County Sheriff's Office (MCSO) vehicles with loud speakers to alert persons within the affected area(s) when sirens are inoperable. There are no events in progress that require siren operation. The NRC Resident Inspector has been notified of the siren failure and this ENS call. |
| Where | |
|---|---|
Palo Verde  Arizona (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-1.8 h-0.075 days <br />-0.0107 weeks <br />-0.00247 months <br />) | |
| Opened: | Daniel Hautala 19:01 Aug 23, 2005 |
| NRC Officer: | John Mackinnon |
| Last Updated: | Aug 23, 2005 |
| 41941 - NRC Website | |
Unit 1 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Cold Shutdown (0 %) |
| After | Cold Shutdown (0 %) |
Unit 2 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Hot Standby (0 %) |
| After | Hot Standby (0 %) |
Unit 3 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (99 %) |
| After | Power Operation (99 %) |
Palo Verde with 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
WEEKMONTHYEARENS 564872023-04-26T06:15:00026 April 2023 06:15:00
[Table view]10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification - Spilled Sodium Hypochlorite ENS 557962022-03-19T20:06:00019 March 2022 20:06:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Technical Support Center (TSC) ENS 554442021-09-01T03:50:0001 September 2021 03:50:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Seismic Monitoring System ENS 552052021-04-22T16:25:00022 April 2021 16:25:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Inadvertant Activation of Emergency Sirens ENS 542722019-09-12T01:24:00012 September 2019 01:24:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Main Steam Line Radiation Monitor Communication Failure ENS 537022018-10-29T07:00:00029 October 2018 07:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification of Non- Work Related Fatality ENS 535752018-08-31T07:00:00031 August 2018 07:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unplanned Loss of Steam Line Monitor Channels ENS 535222018-07-23T07:00:00023 July 2018 07:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unplanned Loss of Steam Line Monitor Channels ENS 532152018-02-16T04:53:00016 February 2018 04:53:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Automatic Reactor Trip Due to Low Departure from Nucleate Boiling Signal ENS 529892017-09-22T22:00:00022 September 2017 22:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Seismic Monitoring Computer Out-Of-Service ENS 522292016-09-09T01:56:0009 September 2016 01:56:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of the Seismic Monitoring System Computer ENS 518442016-04-02T05:29:0002 April 2016 05:29:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Sodium Hypochlorite Spill on Site ENS 510412015-05-04T10:20:0004 May 2015 10:20:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Seismic Monitoring System Out of Service ENS 509842015-04-15T02:20:00015 April 2015 02:20:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Sodium Hydroxide Spill Onsite Exceeding Reportable Quantity ENS 496162013-12-08T15:00:0008 December 2013 15:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Assessment Due to Technical Support Center Uninterruptable Power Supply Planned Replacement ENS 494822013-10-29T13:05:00029 October 2013 13:05:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Employee Fatality ENS 488492013-03-25T17:30:00025 March 2013 17:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness One Alert Notification Siren Removed from Service for Planned Maintenance ENS 483472012-09-26T20:36:00026 September 2012 20:36:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Attempted Entry Onto the Site by an Illegal Alien with False Identification ENS 476882012-02-23T01:45:00023 February 2012 01:45:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Suspicious Package Discovered on Site ENS 473332011-10-08T23:19:0008 October 2011 23:19:00 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 Due to Severe Electrical Fault in Rcp Junction Box ENS 472742011-09-18T15:30:00018 September 2011 15:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Out of Service Due to Planned Maintenance ENS 472682011-09-14T17:23:00014 September 2011 17:23:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Two Public Warning System Sirens ENS 470502011-07-14T21:11:00014 July 2011 21:11:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release News Release Regarding Arrest of Illegal Immigrant Working at Palo Verde ENS 466342011-02-22T16:09:00022 February 2011 16:09:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Loss of Potable Water Supply ENS 463312010-10-14T16:15:00014 October 2010 16:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Sirens Will Be Taken Out of Service for Planned Maintenance ENS 461882010-08-18T14:42:00018 August 2010 14:42:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Several Public Warning System Sirens ENS 461402010-07-30T14:20:00030 July 2010 14:20:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Siren ENS 459682010-06-01T14:15:0001 June 2010 14:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Public Warning System Siren Out of Service ENS 454252009-10-11T11:50:00011 October 2009 11:50:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Reactor Water Level Indication Inoperable ENS 449242009-03-21T16:00:00021 March 2009 16:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Various Control Room Annunciators and Alarms Out of Service Due to Maintenance on Power Supply ENS 446922008-12-02T23:20:0002 December 2008 23:20:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of One (1) Emergency Siren ENS 446062008-10-28T16:00:00028 October 2008 16:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Maintenance on Public Prompt Notification System Emergency Sirens ENS 444012008-08-08T22:20:0008 August 2008 22:20:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification to Maricopa County Environmental Services ENS 438762007-12-31T15:40:00031 December 2007 15:40:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Death of an Employee Outside the Protected Area ENS 438242007-12-04T14:00:0004 December 2007 14:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness, 10 CFR 50.72(b)(3)(xii), Transport of a Contaminated Person Offsite Offsite Notification Due to Potential Loss of Three Sirens ENS 437642007-11-02T14:44:0002 November 2007 14:44:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Suspicious Explosive Device Discovered in Vehicle at Oca Access Checkpoint ENS 427012006-07-12T14:30:00012 July 2006 14:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness One Siren in Ep Zone Is Out of Service ENS 423812006-03-02T21:30:0002 March 2006 21:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification ENS 421012005-10-31T19:02:00031 October 2005 19:02:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Media Interest ENS 419602005-08-29T17:30:00029 August 2005 17:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Off Site Notifications Due to Loss of Inoperable Emergency Evacuation Siren ENS 419412005-08-23T20:49:00023 August 2005 20:49:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Two Emergency Sirens Inoperable ENS 419122005-08-11T15:45:00011 August 2005 15:45:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness One Emergency Preparedness Siren Out of Service ENS 418742005-07-26T23:35:00026 July 2005 23:35:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Inoperable Single Emergency Siren ENS 418102005-06-29T11:43:00029 June 2005 11:43:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Evacuation Siren Inoperable ENS 414972005-03-16T01:51:00016 March 2005 01:51:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notifications Due to Caustic Spill ENS 414862005-03-13T01:45:00013 March 2005 01:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Operability of One Emergency Evacuation Siren ENS 414662005-03-07T15:10:0007 March 2005 15:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Two Emergency Sirens Inoperable ENS 414512005-02-28T21:57:00028 February 2005 21:57:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Major Loss of Siren Coverage within the Emergency Planning Zone ENS 412682004-12-17T17:53:00017 December 2004 17:53:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notifications Made Due to Spill of Approximately 1400 Pounds of Sulfuric Acid ENS 408142004-06-14T14:44:00014 June 2004 14:44:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 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 Alert Declared - Reactor Trip Due to Loss of Off Site Power ENS 408162004-06-14T14:44:00014 June 2004 14:44:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 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 Due to Reactor Trip Due to Loss of Off Site Power ENS 408152004-06-14T14:44:00014 June 2004 14:44:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 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 Reactor Trip Due to Loss of Off Site Power ENS 406802004-04-17T14:26:00017 April 2004 14:26:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification - Small Fire at Palo Verde 1: Two Employees Injured, No Plant Equipment Damage ENS 405612004-03-01T23:49:0001 March 2004 23:49:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Press Release Regarding Boron Residue ENS 405332004-02-20T17:33:00020 February 2004 17:33:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to a Press Release Concerning the Unit 2 Shutdown 2023-04-26T06:15:00 | |
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