ENS 48504
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ENS Event | |
|---|---|
14:00 Nov 13, 2012 | |
| Title | Partial Loss of Emergency Assessment During Planned Modifications |
| Event Description | Cook Nuclear Power Plant will begin a cyber security modification of Unit 1 and Unit 2 Plant Process Computers (PPCs) and associated network infrastructure on Tuesday, November 13, 2012 at 0900 EST. This includes the Emergency Response Data System (ERDS) communication with the NRC Operations Center.
The entire PPC for each unit will be out of service and unavailable for approximately 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. During that time, the PPC satellite display systems in the Control Rooms, TSC and EOF will be unavailable. After approximately 9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br />, the ERDS will be restored to service along with the satellite display systems in the Control Rooms, TSC and EOF. Compensatory measures exist within the DC Cook Emergency Response procedures to provide plant data in the event of an actual Emergency to the NRC Operations Center until the ERDS can be returned to service. Unavailability of the ERDS and Control Room, TSC and EOF data is being reported in accordance with 10 CFR 50.72(b)(3)(xiii) as a major loss of emergency assessment capability. The NRC Resident Inspector has been notified. A follow-up ENS communication will be made when both units ERDS are fully restored to service. Unit 1 and Unit 2 PPC availability is expected to be restored on Tuesday, November 13, 2012 at 1500 EST. ERDS communication with the NRC Operations Center is expected to be restored on November 13, 2012 at 1800 EST.
The licensee notified the Operations Center that the PPC work was delayed and, as a consequence, ERDS restoration will be delayed. Work on the PPC continues. The licensee has notified the NRC Resident Inspector. Notified R3DO (Giessner) and ERDS Group (via email).
ERDS was declared operable at 1815 EST. The licensee notified the NRC Resident Inspector. Notified R3DO (Giessner) and ERDS Group (via email). |
| Where | |
|---|---|
Cook  Michigan (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-6.18 h-0.258 days <br />-0.0368 weeks <br />-0.00847 months <br />) | |
| Opened: | Braddock Lewis 07:49 Nov 13, 2012 |
| NRC Officer: | John Knoke |
| Last Updated: | Nov 13, 2012 |
| 48504 - 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 502382014-06-30T11:30:00030 June 2014 11:30:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Maintenance on Technical Support Center Ventilation ENS 502232014-06-24T15:00:00024 June 2014 15:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Tsc Ventilation System Due to Scheduled Maintenance ENS 498032014-02-07T08:00:0007 February 2014 08:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailabiliity of Tsc Ventilation System Due to Scheduled Maintenance ENS 496872014-01-01T16:00:0001 January 2014 16:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Tsc Ventilation System Non-Functional ENS 496822013-12-31T15:50:00031 December 2013 15:50:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Tsc Ventilation System Due to Scheduled Maintenance ENS 495632013-11-21T01:00:00021 November 2013 01:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Preparedness Capabilities Due to Unit 2 Plant Process Computer Replacement ENS 492892013-08-19T13:00:00019 August 2013 13:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Preparedness Capabilities Due to Unit 1 Ppc Replacement ENS 491912013-07-15T13:34:00015 July 2013 13:34:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unplanned Loss of Communications Due to Offsite Fiber Optic Cable Damage ENS 491702013-07-03T05:15:0003 July 2013 05:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Technical Support Center Ventilation System Due to Scheduled Maintenance ENS 489802013-04-29T13:00:00029 April 2013 13:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Tsc Ventilation System Out of Service for Scheduled Maintenance ENS 489222013-04-14T18:00:00014 April 2013 18:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Tsc Ventilation System Due to Scheduled Maintenance ENS 486452013-01-03T08:00:0003 January 2013 08:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Tsc Ventilation System Due to Scheduled Maintenance ENS 485042012-11-13T14:00:00013 November 2012 14:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Partial Loss of Emergency Assessment During Planned Modifications ENS 480602012-07-02T06:00:0002 July 2012 06:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Tsc Ventilation System Due to Scheduled Maintenance ENS 478012012-04-03T12:00:0003 April 2012 12:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unit 2 Plant Process Computer Out-Of-Service for Planned Maintenance ENS 477942012-04-01T08:26:0001 April 2012 08:26:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Tsc Ventilation System Due to Scheduled Maintenance ENS 475662012-01-03T09:00:0003 January 2012 09:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Technical Support Center Ventilation Due to Scheduled Maintenance ENS 473172011-10-04T08:00:0004 October 2011 08:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Tsc Ventilation System Due to Scheduled Maintenance ENS 470402011-07-11T08:00:00011 July 2011 08:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Tsc Ventilation System Due to Scheduled Maintenance ENS 470252011-07-06T08:00:0006 July 2011 08:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Tsc Ventilation System Due to Scheduled Maintenance ENS 467312011-04-06T08:00:0006 April 2011 08:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Ventilation System Out of Service Due to Planned Maintenance ENS 465202011-01-04T13:00:0004 January 2011 13:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Tsc Ventilation System Due to Scheduled Maintenance ENS 463392010-10-18T14:00:00018 October 2010 14:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Emergency Response Data System (Erds) for Scheduled Maintenance ENS 463102010-10-06T11:00:0006 October 2010 11:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Tsc Ventilation System Due to Scheduled Maintenance ENS 460892010-07-13T12:10:00013 July 2010 12:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Tsc Ventilation System Due to Scheduled Maintenance ENS 458312010-04-12T08:00:00012 April 2010 08:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Scheduled Maintenance on the Technical Support Center Ventilation System ENS 456982010-02-15T14:30:00015 February 2010 14:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Emergency Response Data System (Erds) Due to Plant Process Computer (Ppc) Scheduled Maintenance ENS 456532010-01-25T14:30:00025 January 2010 14:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Response Data System Unavailable Due to Plant Process Computer Maintenance ENS 456202010-01-12T09:00:00012 January 2010 09:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Tsc Ventilation System and Charcoal Filter for Scheduled Maintenance ENS 454542009-10-22T04:01:00022 October 2009 04:01:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Out of Service for Ventilation System and Charcoal Filter Maintenance ENS 454292009-10-13T11:44:00013 October 2009 11:44:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Unavailable Due to Planned Maintenance ENS 453112009-08-31T11:21:00031 August 2009 11:21:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Tsc Potentially Out of Service ENS 451852009-07-06T11:12:0006 July 2009 11:12:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Tsc Ventilation System and Charcoal Filter for Scheduled Maintenance ENS 449922009-04-15T08:15:00015 April 2009 08:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Tsc Ventilation System and Charcoal Filter During Scheduled Maintenance ENS 447652009-01-13T14:07:00013 January 2009 14:07:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Unavailable Due to Scheduled Hvac Maintenance ENS 445702008-10-16T15:00:00016 October 2008 15:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Partial Unavailability of Tsc Ventilation Air Conditioning System for Scheduled Maintenance ENS 445422008-10-06T08:45:0006 October 2008 08:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Tsc Ventilation System and Charcoal Filter for Scheduled Maintenance ENS 443902008-08-07T16:15:0007 August 2008 16:15:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Technical Support Center ENS 443242008-06-27T19:00:00027 June 2008 19:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Procedure Change Initiated to Support Tsc Habitability Dose Calculation ENS 443112008-06-23T07:00:00023 June 2008 07:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Response Capability - Tsc Is Unavailable ENS 442922008-06-12T17:45:00012 June 2008 17:45:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Unavailability of Emergency Operations Facility ENS 441412008-04-14T16:00:00014 April 2008 16:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Siren Alert Notification System Due to System Modifications ENS 441222008-04-07T08:30:0007 April 2008 08:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center May Become Uninhabitable Due to Scheduled Maintenance ENS 439352008-01-25T18:00:00025 January 2008 18:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center May Become Uninhabitable 2014-06-30T11:30:00 | |
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