ENS 46974
From kanterella
Revision as of 18:27, 24 September 2017 by StriderTol (talk | contribs) (Created page by program invented by Mark Hawes)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
ENS Event | |
|---|---|
13:45 Jun 20, 2011 | |
| Title | Unplanned Power Outages Affect Emergency Response Systems |
| Event Description | On June 20, 2011, at approximately 0945 hours0.0109 days <br />0.263 hours <br />0.00156 weeks <br />3.595725e-4 months <br />, electrical power was lost to non-essential 120 volt busses V-1-F and V-2-F. The busses supply electrical power to the plant integrated computer system (ICS). As a result of the power loss, the Safety Parameter Display System (SPDS), the Emergency Response Data System (ERDS), and the automatic mode calculation of the Computer Aided Dose Assessment Program (CADAP) were unavailable.
Preliminary investigation indicates the power loss was caused by receipt of a spurious high temperature alarm (greater than 95 degrees F) in the Technical Support Center (TSC) facility where the electrical busses are located. The alarm signal is believed to be invalid because the high temperature alarm came in for two minutes and reset, and the ambient temperature in the TSC remained steady at 65 degrees F. Electrical busses V-1-F and V-2-F were re-energized and restored to service at 1505 hours0.0174 days <br />0.418 hours <br />0.00249 weeks <br />5.726525e-4 months <br />. The ICS, SPDS, ERDS, and CADAP systems were fully restored at 1652 hours0.0191 days <br />0.459 hours <br />0.00273 weeks <br />6.28586e-4 months <br /> on June 20, 2011. In the event of an emergency while these systems were unavailable, contingency plans were in place to transmit plant parameter data and perform the dose assessment function. This event is being reported in accordance with 10 CFR 50.72(b)(3)(xiii), as a condition that results in a major loss of emergency assessment and communications capability. The NRC Resident Inspector has been notified. |
| Where | |
|---|---|
Perry  Ohio (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+3.42 h0.143 days <br />0.0204 weeks <br />0.00468 months <br />) | |
| Opened: | Jeff Tufts 17:10 Jun 20, 2011 |
| NRC Officer: | Pete Snyder |
| Last Updated: | Jun 20, 2011 |
| 46974 - NRC Website
Loading map... {"minzoom":false,"maxzoom":false,"mappingservice":"leaflet","width":"350px","height":"250px","centre":false,"title":"","label":"","icon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"zoom":6,"defzoom":14,"layers":["OpenStreetMap"],"image layers":[],"overlays":[],"resizable":false,"fullscreen":false,"scrollwheelzoom":true,"cluster":false,"clustermaxzoom":20,"clusterzoomonclick":true,"clustermaxradius":80,"clusterspiderfy":true,"geojson":"","clicktarget":"","imageLayers":[],"locations":[{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca class=\"mw-selflink selflink\"\u003EENS 46974\u003C/a\u003E - \u003Ca href=\"/Perry\" title=\"Perry\"\u003EPerry\u003C/a\u003E\n\u003C/p\u003E\u003C/div\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EUnplanned Power Outages Affect Emergency Response Systems\n\u003C/p\u003E\u003C/div\u003E","title":"ENS 46974 - Perry\n","link":"","lat":41.79572777777778,"lon":-81.145375,"icon":"/w/images/a/ad/FirstEnergy_icon.png"}],"imageoverlays":null} | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 487082013-01-31T07:10:00031 January 2013 07:10:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Response Data System (Erds) ENS 486102012-12-20T12:51:00020 December 2012 12:51:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System (Erds) Out-Of-Service ENS 484492012-10-28T14:08:00028 October 2012 14:08:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Equipment Failure Affecting Spds and Erds ENS 484152012-10-17T12:00:00017 October 2012 12:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System (Erds) Out of Service ENS 479132012-05-10T15:00:00010 May 2012 15:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System and Emergency Response Data System Out of Service ENS 469742011-06-20T13:45:00020 June 2011 13:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unplanned Power Outages Affect Emergency Response Systems ENS 463702010-10-28T11:59:00028 October 2010 11:59:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System (Erds) Oos ENS 458802010-04-29T12:30:00029 April 2010 12:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Plant Integrated Computer System Outage Due to Scheduled Maintenance ENS 457682010-03-15T12:10:00015 March 2010 12:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System Out of Service Due to Computer Failure ENS 455912009-12-25T20:40:00025 December 2009 20:40:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness ENS 449892009-04-14T11:43:00014 April 2009 11:43:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System and Erds Out of Service ENS 449452009-03-30T22:43:00030 March 2009 22:43:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System (Erds) Out of Service ENS 449052009-03-13T04:25:00013 March 2009 04:25:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Partial Loss of Plant Computer for Scheduled Maintenance Taking Erds Oos ENS 448812009-02-27T10:00:00027 February 2009 10:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System (Erds) Out of Service ENS 448432009-02-10T13:10:00010 February 2009 13:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Plant Computer Oos for Scheduled Maintenance Taking Erds Oos ENS 446222008-11-02T13:30:0002 November 2008 13:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System (Erds) Out of Service for Planned Maintenance ENS 446132008-10-30T04:20:00030 October 2008 04:20:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System (Erds) Out of Service ENS 444402008-08-26T12:14:00026 August 2008 12:14:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Erds and Spds Out of Service Due to Plant Computer Maintenance ENS 442792008-06-10T06:00:00010 June 2008 06:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System Will Be Taken Out of Service 2013-01-31T07:10:00 | |
Retrieved from "https://kanterella.com/w/index.php?title=ENS_46974&oldid=87512"