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 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 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 515642015-11-24T11:34:00024 November 2015 11:34:00
10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat
Residual Heat Removal Pump Tripped During Initiation of Shutdown Cooling
ENS 510342015-05-02T17:47:0002 May 2015 17:47:00
10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat
Loss of Shutdown Cooling Due to Loss of 4Kv Bus
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 488092013-03-06T10:01:0006 March 2013 10:01:00
10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat
Momentary Loss of Shutdown Cooling
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 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 449572009-04-02T10:43:0002 April 2009 10:43:00
10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat
Residual Heat Removal Inoperable
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 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 414682005-03-08T10:54:0008 March 2005 10:54:00
10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat
Rhr Pump Tripped Due to Loss of Valve Position Indication
ENS 414362005-02-23T18:00:00023 February 2005 18:00:00
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)(iv)(A), System Actuation
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 400082003-07-22T14:48:00022 July 2003 14:48:00
10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor
Helb Door Not Latched as Required Due to Personnel Error
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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