WEEKMONTHYEARENS 578322025-07-29T01:58:00029 July 2025 01:58:00
10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Manual Reactor Scram
ENS 576182025-03-19T16:36:00019 March 2025 16:36:00
10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation
Automatic Reactor Scram
ENS 571992024-06-28T06:10:00028 June 2024 06:10:00
10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Both Divisions of Lpci Inoperable
ENS 569952024-02-28T14:39:00028 February 2024 14:39:00
10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation
Automatic Reactor Scram
ENS 567592023-09-27T15:41:00027 September 2023 15:41:00
10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation
Actuation of Reactor Protection and Containment Isolation Systems
ENS 558962022-05-13T16:11:00013 May 2022 16:11:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Control Room Envelope Inoperable
ENS 541112019-06-11T16:32:00011 June 2019 16:32:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Normally Closed Primary Containment Isolation Valves Found in the Open Position
ENS 539972019-04-12T23:15:00012 April 2019 23:15:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
En Revision Imported Date 5/28/2019
ENS 535972018-09-11T05:00:00011 September 2018 05:00:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Unanalyzed Condition
ENS 528142017-06-20T04:53:00020 June 2017 04:53:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
High Pressure Coolant Injection Inoperable
ENS 524542016-12-21T15:35:00021 December 2016 15:35:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
High Pressure Coolant Injection System Inoperable
ENS 523962016-11-27T20:47:00027 November 2016 20:47:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
High Pressure Coolant Injection Declared Inoperable
ENS 518122016-03-22T06:04:00022 March 2016 06:04:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
High Pressure Coolant Injection (Hpci) Oil Leak
ENS 515602015-11-23T16:40:00023 November 2015 16:40:00
10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation
Reactor Scram Due to a Reactor Recirculation Pump Lockout
ENS 509152015-03-21T10:37:00021 March 2015 10:37:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
High Pressure Coolant Injection Inoperable Due to Condensation in Steam Line
ENS 508992015-03-16T23:20:00016 March 2015 23:20:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
High Pressure Coolant Inject Declared Inoperable Following Scheduled Maintenance
ENS 507052014-12-29T02:23:00029 December 2014 02:23:00
10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor, 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Two Inoperable Emergency Diesel Generators
ENS 504962014-09-26T03:00:00026 September 2014 03:00:00
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, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Containment Isolation Declared Inoperable Due to Relay Age
ENS 503452014-08-05T19:46:0005 August 2014 19:46:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Both Trains of Control Room Emergency Filtration System Inoperable
ENS 499702014-03-28T18:58:00028 March 2014 18:58:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Failure of Secondary Containment Door Interlock
ENS 498192014-02-11T20:30:00011 February 2014 20:30:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Drywell to Torus Vacuum Breaker Failure During Surveillance Testing
ENS 498142014-02-10T22:50:00010 February 2014 22:50:00
10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor, 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Single Failure Vulnerability Affecting Emergency Diesel Generator Operability
ENS 498082014-02-07T16:05:0007 February 2014 16:05:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Single Drywell to Torus Vacuum Breaker Not Going Fully Closed During Surveillance Test
ENS 493632013-09-19T22:50:00019 September 2013 22:50:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
High Pressure Coolant Injection Inoperable Due to Steam Leak
ENS 493562013-09-19T03:29:00019 September 2013 03:29:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Both Secondary Containment Access Doors Briefly Opened Simultaneously
ENS 491132013-06-13T19:30:00013 June 2013 19:30:00
10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(iv)(A), System Actuation, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Emergency Diesel Generators Start
ENS 483412012-09-25T15:44:00025 September 2012 15:44:00
10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation
Automatic Reactor Scram During Maintenance on 4160V Bus 12 Ammeter
ENS 481902012-08-15T01:45:00015 August 2012 01:45:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Safety System Overpressure Protection Failure Due to Closed Valves
ENS 479092012-05-08T14:00:0008 May 2012 14:00:00
10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor, 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
an Unanalyzed Condition Could Delay Transfer to Emergency Diesel Generators Under Certain Postulated Conditions
ENS 474792011-11-27T22:57:00027 November 2011 22:57:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Rod Worth Minimizer Control Switch Found Out of Required Position
ENS 474602011-11-20T05:12:00020 November 2011 05:12:00
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(b)(3)(iv)(A), System Actuation
Automatic Reactor Scram While Performing Turbine Bypass Valve Testing
ENS 473642011-10-21T17:50:00021 October 2011 17:50:00
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(b)(3)(iv)(A), System Actuation
Automatic Reactor Scram Due to Lockout of Auxiliary Power Transformer
ENS 473062011-09-29T22:00:00029 September 2011 22:00:00
10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor, 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Inadequate Surveillance Testing of Emergency Diesel Generators
ENS 469992011-06-30T10:16:00030 June 2011 10:16:00
10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Power Range Monitor Channels Out of Alignment
ENS 469372011-06-08T13:00:0008 June 2011 13:00:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Secondary Containment Inoperable Due to Ventilation Alignment Issue
ENS 466062011-02-11T09:27:00011 February 2011 09:27:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Inoperable Containment Isolation Dampers
ENS 464312010-11-22T23:47:00022 November 2010 23:47:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Valves Identified Open in Mode 2 That Should Have Been Closed
ENS 463972010-11-05T04:25:0005 November 2010 04:25:00
10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Four Average Power Range Monitors Outside Allowable Range
ENS 463942010-11-04T05:00:0004 November 2010 05:00:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Containment Air Lock Doors Not Operated Properly
ENS 461552010-08-05T16:45:0005 August 2010 16:45:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Momentary Loss of Secondary Containment Due to Personnel Passing Through Open Airlocks
ENS 459752010-06-03T15:50:0003 June 2010 15:50:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Secondary Containment Briefly Degraded
ENS 454242009-10-10T18:21:00010 October 2009 18:21:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Control Room Filtration Out of Service for Maintainance
ENS 452792009-08-20T13:38:00020 August 2009 13:38:00
10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Both Divisions of Vital Switchgear Inoperable Because Flood Door Found Closed
ENS 450602009-05-13T02:30:00013 May 2009 02:30:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Instrument Valve Malfunction Potentially Affecting the Isolation Capability of One of the Main Steam Lines
ENS 444842008-09-12T03:47:00012 September 2008 03:47:00
10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(b)(3)(iv)(A), System Actuation
Reactor Scram and Isolation Due to Transformer Lockout
ENS 440502008-03-10T23:13:00010 March 2008 23:13:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Hpci Inoperable
ENS 430882007-01-10T21:28:00010 January 2007 21:28:00
10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation
Reactor Scram with Stuck Open Main Turbine Control Valves
ENS 426072006-05-27T22:14:00027 May 2006 22:14:00
10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Excess Temperature in Room Housing Safety Function Systems
ENS 423012006-02-02T05:00:0002 February 2006 05:00:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Emergency Filtration Train Fan Declared Inoperable
ENS 418972005-08-05T22:54:0005 August 2005 22:54:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Loss of Both Control Room Emergency Ventilation Systems During Testing
ENS 415672005-04-05T22:00:0005 April 2005 22:00:00
10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor, 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Potential Vulnerability with Alternate Shutdown System (Asds) Isolation Design
ENS 413742005-02-04T19:37:0004 February 2005 19:37:00
10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor, 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
4160 Volt Relaying and Metering Single Failure Vulnerability
ENS 412672004-12-15T13:00:00015 December 2004 13:00:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
High Pressure Coolant Injection (Hpci) System Pump Bearing Oil Plug Found Loose
ENS 408862004-07-21T10:12:00021 July 2004 10:12:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Both Control Room Ventialtion (Crv) Systems Inoperable.
ENS 404812004-01-26T20:30:00026 January 2004 20:30:00
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Recirculation Fan Alteration Affects Accident Mitigation
ENS 399702003-06-30T20:45:00030 June 2003 20:45:00
10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor, 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
High Energy Line Break (Helb) Door Not Latched
2025-07-29T01:58:00
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