ENS 43802
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ENS Event | |
|---|---|
20:08 Nov 21, 2007 | |
| Title | Safety Parameter Display System Degradation |
| Event Description | On 11/21/2007 at 1408 hours0.0163 days <br />0.391 hours <br />0.00233 weeks <br />5.35744e-4 months <br />, the Clinton Power Station lost a portion of the Safety Parameter Display System in support of Process Computer replacement. These portions are not expected to be restored to service until Process Computer replacement activities are completed. The Plant Process Computer is expected to be fully operational by February 1, 2008.
This event is reportable due to the major loss of emergency assessment capability per 10CFR50.72 (b)(3)(xiii) (when the SPDS has been unavailable for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> or greater). The NRC Resident Inspector has been notified. The alarm for secondary containment sump level has been lost to the SPDS. Compensatory measures are in effect.
The system upgrade has been completed along with full confidence run testing. The SPDS is now considered operational and emergency assessment capability restored. The licensee notified the NRC Resident Inspector and State authorities. R3DO (Ring) was notified. |
| Where | |
|---|---|
Clinton  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-1.22 h-0.0508 days <br />-0.00726 weeks <br />-0.00167 months <br />) | |
| Opened: | Dale Shelton 18:55 Nov 21, 2007 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Mar 14, 2008 |
| 43802 - NRC Website | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (96 %) |
| After | Power Operation (96 %) |
WEEKMONTHYEARENS 563562023-02-06T11:30:0006 February 2023 11:30:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Communications and Assessment Capabilities ENS 521022016-07-18T20:00:00018 July 2016 20:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Offsite Communications Capability ENS 514282015-09-28T19:44:00028 September 2015 19:44:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Invalid Seismic Event Alarm ENS 513242015-08-17T10:05:00017 August 2015 10:05:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Assessment Capability Due to Planned Maintenance on Seismic Instrumentation ENS 512822015-08-01T17:05:0001 August 2015 17:05:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Invalid Seismic Event Alarm ENS 512632015-07-26T09:49:00026 July 2015 09:49:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Invalid Seismic Event Alarm ENS 512212015-07-10T12:00:00010 July 2015 12:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Siren Out of Service ENS 510382015-05-04T11:15:0004 May 2015 11:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Power to the Area Radiation and Process Radiation Local Area Network ENS 509992015-04-21T05:00:00021 April 2015 05:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Assessment Capability Due to Non-Functional Seismic Monitor Laptop ENS 504102014-08-27T10:30:00027 August 2014 10:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness 26 of 40 Ep Sirens Could Not Be Verified Functional ENS 501102014-05-12T13:45:00012 May 2014 13:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Maintenance on Safety Parameter Display System ENS 475322011-12-18T07:19:00018 December 2011 07:19:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System Out of Service ENS 475022011-12-06T19:06:0006 December 2011 19:06:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Communications Capability Due to a Major Cable Cut ENS 465852011-02-02T13:00:0002 February 2011 13:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Partial Loss of Emergency Sirens Due to Severe Winter Storm ENS 459652010-06-01T14:00:0001 June 2010 14:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Unavailable Due to Preventive Maintenance ENS 452442009-08-04T15:53:0004 August 2009 15:53:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Sirens ENS 450722009-05-16T00:42:00016 May 2009 00:42:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness 21 of 44 Sirens Out of Service Due to Severe Weather ENS 438022007-11-21T20:08:00021 November 2007 20:08:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System Degradation ENS 434332007-06-20T18:55:00020 June 2007 18:55:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Major Loss of Emergency Assessment Capability - 13 of 44 Emergency Sirens Out of Service ENS 431262007-01-26T23:15:00026 January 2007 23:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System (Spds) Declared Inoperable. ENS 430182006-12-01T12:30:0001 December 2006 12:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Sirens ENS 423262006-02-10T12:10:00010 February 2006 12:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Assessement Capability ENS 423112006-02-05T16:25:0005 February 2006 16:25:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Spds for Greater than 8 Hours ENS 422582006-01-13T22:45:00013 January 2006 22:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Communications - Greater than 25% of Emergency Notification Sirens Unavailable ENS 417732005-06-14T16:24:00014 June 2005 16:24:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Greater than 25% of the Licensee Notification Sirens Became Unavailable ENS 413342005-01-14T07:39:00014 January 2005 07:39:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Safety Parameter Display System ENS 413112005-01-06T13:45:0006 January 2005 13:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Power to Offsite Sirens Greater than 1 Hour Due to Inclement Weather ENS 405162004-02-12T23:45:00012 February 2004 23:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System (Spds) Out of Service for Maintenance. 2023-02-06T11:30:00 | |
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