ENS 54968
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ENS Event | |
|---|---|
21:08 Oct 27, 2020 | |
| Title | Loss of Emergency Plan Dose Assessment Capability |
| Event Description | At 1608 CDT on 10/27/2020, Wolf Creek Unit 1, operating at 100 percent rated thermal power in Mode-1, experienced a loss of the on-site wired corporate network. During actions to restore, it was discovered the ability to access the dose assessment software was compromised due to a security program. Access to the program was established after some time using Wi-Fi connectivity, but was not able to be accessed without network access. Actions are being taken to rectify.
The NRC Resident Inspector has been notified. The licensee believes this was not a cyber-event and that the Emergency Response Data System was available, but couldn't verify. Should the Wi-Fi network access be lost, there's no capability to perform a dose assessment. Standalone laptops are being provided but have not been placed onsite yet. That should restore the ability to have dose assessment capability at all times.
The licensee notified the NRC that the network has been restored to the Technical Support Center building and the emergency plan dose assessment group was capable of performing dose assessment. The licensee also noted that the group is able to perform dose assessment without the network, if needed. The network is still unavailable in the control room. The licensee confirmed that ERDS is available. The licensee will notify the NRC Resident Inspector. Notified R4DO (Pick). |
| Where | |
|---|---|
Wolf Creek  Kansas (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+0.58 h0.0242 days <br />0.00345 weeks <br />7.94484e-4 months <br />) | |
| Opened: | Jon Weber 21:43 Oct 27, 2020 |
| NRC Officer: | Ossy Font |
| Last Updated: | Oct 27, 2020 |
| 54968 - NRC Website | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 549682020-10-27T21:08:00027 October 2020 21:08:00
[Table view]10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Plan Dose Assessment Capability ENS 536472018-10-05T05:00:0005 October 2018 05:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness En Revision Imported Date 10/19/2018 ENS 521842016-08-16T16:00:00016 August 2016 16:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Failure of All Emergency Sirens ENS 512972015-08-06T22:39:0006 August 2015 22:39:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Technical Support Center Non-Functional ENS 504072014-08-27T13:05:00027 August 2014 13:05:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Communications Due to Power Supply Failure ENS 496922014-01-06T09:30:0006 January 2014 09:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Three Emergency Plan Sirens ENS 486492013-01-03T12:04:0003 January 2013 12:04:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Saftey Parameter Display System (Spds) ENS 467202011-04-04T05:30:0004 April 2011 05:30:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Emergency Sirens Out of Service Due to Severe Weather ENS 465752011-01-28T16:09:00028 January 2011 16:09:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Planned Primary Communications Maintenance ENS 439742008-02-09T19:20:0009 February 2008 19:20:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System (Spds) Removed from Service for Scheduled Maintenance ENS 434402007-06-22T01:00:00022 June 2007 01:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness "Spds (Safety Parameter Display System) Inoperable Due to Plant Computer Inoperability ENS 433962007-05-31T07:10:00031 May 2007 07:10:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Plan Sirens Due to 69Kv Distribution System Fault ENS 433942007-05-29T13:08:00029 May 2007 13:08:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Safety Parameter Display System (Spds) Removed from Service for Computer Upgrade ENS 431192007-01-25T11:42:00025 January 2007 11:42:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Safety Parameters Display System (Spds) ENS 426352006-06-12T20:56:00012 June 2006 20:56:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Spds During Planned Computer Maintenance ENS 418312005-07-10T03:54:00010 July 2005 03:54:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Assessment Capability Due to Inoperable Ep Sirens ENS 417842005-06-17T21:54:00017 June 2005 21:54:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Safety Parameter Display System ENS 415092005-03-21T21:53:00021 March 2005 21:53:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Safety Parameter Display System (Spds) Function for Greater than 8 Hours. ENS 403452003-11-20T23:00:00020 November 2003 23:00:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Spds for Greater than 8 Hours ENS 402592003-10-18T22:20:00018 October 2003 22:20:00 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Assessment Capability 2020-10-27T21:08:00 | |
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