WEEKMONTHYEARENS 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 521542016-08-05T03:40:0005 August 2016 03:40:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Unanalyzed Fire Barrier
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 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 508062015-02-10T18:40:00010 February 2015 18:40:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Unanalyzed Condition in Station Blackout Implementation at Monticello
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 506632014-12-10T00:30:00010 December 2014 00:30:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
High Energy Line Break Door Found Closed
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 504562014-09-14T07:26:00014 September 2014 07:26:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Operation in Unanalyzed Region of the Power to Flow Map
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 501172014-05-15T21:20:00015 May 2014 21:20:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Degraded Fire Barrier
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 499382014-03-20T15:20:00020 March 2014 15:20:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Appendix R Fire Door Failed to Close and Latch
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 493352013-09-09T19:00:0009 September 2013 19:00:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
High Energy Line Break Barrier Improperly Obstructed
ENS 493162013-09-01T21:10:0001 September 2013 21:10:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Recirc Pump Runback and Power Reduction
ENS 493142013-08-29T16:00:00029 August 2013 16:00:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Failure to Address All the Effects of External Flooding Scenarios
ENS 493122013-08-28T02:52:00028 August 2013 02:52:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Recirc Pump Runback and Power Reduction
ENS 492932013-08-22T01:00:00022 August 2013 01:00:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Unanalyzed Condition for Emergency Diesel Generator Fuel Oil Pumps Train Separation
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 490852013-05-31T19:00:00031 May 2013 19:00:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Unanalyzed Condition Concerning Flooding Mitigation
ENS 489192013-04-13T03:00:00013 April 2013 03:00:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Unanalyzed Condition Due to Isolated Differential Pressure Switch on Safety Relief Valve Tailpipe
ENS 486162012-12-20T22:00:00020 December 2012 22:00:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Unanalyzed Condition Due to an Identified Degraded Fire Barrier
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 480722012-07-05T17:58:0005 July 2012 17:58:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Unanalyzed Condition Due to Blocking Both Reactor Building Railroad Bay Doors
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 472372011-09-02T21:00:0002 September 2011 21:00:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Intake Structure Fire Suppression System Failed Surveillance Test
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 464172010-11-12T18:10:00012 November 2010 18:10:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Unanalyzed 10Cfr50 Appendix R Scenario
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 463272010-10-11T18:05:00011 October 2010 18:05:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Technical Specification Does Not Account for Power Uprate
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 447232008-12-15T22:16:00015 December 2008 22:16:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Unanalyzed Condition Due to Steam Chase Temperature Greater than 165F
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 438362007-12-11T14:55:00011 December 2007 14:55:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Loss of Rhr Room Cooler
ENS 435252007-07-26T14:02:00026 July 2007 14:02:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Unanalyzed Condition - Flood Doors Closed Causing a Potential Loss of Both Vital Switchgear
ENS 434882007-07-12T21:30:00012 July 2007 21:30:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Unallowable Manual Actions Credited for Fire Safe Shutdown
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 420132005-09-25T19:10:00025 September 2005 19:10:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Degradation in Fire Barrier Discovered During an Inspection
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 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 410052004-09-01T17:45:0001 September 2004 17:45:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Unanalyzed Condition Due to Appendix R Criteria Not Satisfied for Safe Shutdown Equipment
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 401462003-09-10T22:46:00010 September 2003 22:46:00
10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition
Unanalyzed Condition Due to a Potential Break in Fire Protection Water System
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
2022-05-13T16:11:00
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