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 Issue dateTitleTopic
05000388/LER-2017-0102 February 2018Condition Prohibited by Technical Specifications Due to Drift of Reactor Pressure Switches
LER 17-010-00 for Susquehanna, Unit 2 Regarding Condition Prohibited by Technical Specifications Due to Drift of Reactor Pressure Switches
05000387/LER-2017-0079 October 2017Secondary Containment Declared Inoperable Due to the opening of a plenum.
LER 17-007-00 for Susquehanna Steam Electric Station Regarding Secondary Containment Declared Inoperable Due to Supply Air Flow
05000387/LER-2017-0054 October 2017Automatic Reactor Protection System Trip on High Neutron Flux
LER 17-005-01 for Susquehanna, Unit 1 Regarding Automatic Reactor Protection System Trip on High Neutron Flux
05000388/LER-2017-00818 September 20171 OF 3
LER 17-008-00 for Susquehanna, Unit 2, Regarding Condition Prohibited by Technical Specifications Due to a Loose Terminal Block Associated with a Primary Containment Isolation Valve
05000387/LER-2017-0066 September 2017Control Room Envelope In-leakage Exceeded the Technical Specification Limit
LER 17-006-00 for Susquehanna, Unit 2, Regarding Secondary Containment Declared Inoperable Due to Trip of Zone II Exhaust Fan
Time of Discovery
05000387/LER-2017-0044 August 2017Secondary Containment Declared Inoperable Due to Failure of an Exhaust Fan Breaker.
LER 17-004-00 for Susquehanna, Unit 1, Regarding Secondary Containment Declared Inoperable Due to Failure of an Exhaust Fan Breaker
05000387/LER-2017-0035 May 2017Susquehanna Steam Electric Station Unit 1 05000387
LER 17-003-00 for Susquehanna, Units 1 and 2, Regarding Loss of Secondary Containment Zone 3 Due to Fan Trip
05000388/LER-2017-0025 May 2017Implementation of Enforcement Guidance Memorandum (EGM) 11-003, Revision 3 during Unit 2 Refueling
LER 17-002-00 for Susquehanna, Unit 2, Regarding Implementation of Enforcement Guidance Memorandum (EGM) 11-003, Revision 3 During Unit 2 Refueling
05000387/LER-2017-0015 May 2017Secondary Containment Breach Due to Simultaneous Opening of Airlock Doors
LER 17-001-00 for Susquehanna, Unit 2, Regarding Secondary Containment Declared Inoperable Due to Airlock Doors Open Due to Sticking Door Latch
05000387/LER-2017-00212 April 2017Secondary Containment Breach due to Simultaneous Opening of Airlock Doors
LER 17-002-00 for Susquehanna, Unit 1, Regarding Secondary Containment Breach due to Simultaneous Opening of Airlock Doors
Coast down
05000388/LER-2016-00512 July 2016Unit 2 HPCI Manually Overridden Prior to a Manual Scram During a Plant Transient
LER 16-005-00 for Susquehanna, Unit 2, Regarding HPCI Manually Overridden Prior to a Manual Scram During a Plant Transient
05000387/LER-2016-01515 June 2016Secondary Containment Declared Inoperable Due to Airlock Doors Open Due to a Human Performance Error
LER 16-015-00 for Susquehanna, Unit 1, Regarding Secondary Containment Declared Inoperable Due to Airlock Doors Open Due to a Human Performance Error
05000387/LER-2016-0139 June 2016Secondary Containment Declared Inoperable Due to Simultaneous Opening of Double Airlock Doors
LER 16-013-00 for Susquehanna, Unit 1, Regarding Secondary Containment Declared Inoperable Due to Simultaneous Opening of Double Airlock Doors
Time of Discovery
05000387/LER-2016-0149 June 2016Secondary Containment Declared Inoperable Due to Airlock Doors Open Due to a Human Performance Error
LER 16-014-00 for Susquehanna, Unit 1, Regarding Secondary Containment Declared Inoperable Due to Airlock Doors Open Due to a Human Performance Error
05000387/LER-2016-01031 May 2016Secondary Containment Declared Inoperable Due to Airlock Doors Open Due to Medical Emergency
LER 16-010-00 for Susquehanna, Unit 1, Regarding Secondary Containment Declared Inoperable Due to Airlock Doors Open Due to Medical Emergency
05000387/LER-2016-00926 May 2016Valid Primary Containment Isolation Actuation during Local Leak Rate Testing due to Human Performance Error
LER 16-009-00 for Susquehanna, Unit 1, Regarding Valid Primary Containment Isolation Actuation During Local Leak Rate Testing Due to Human Performance Error
05000387/LER-2016-00819 May 2016Inoperability of Diesel Generator Due to Misalignment of MOC Switch Contacts Due to Inadequate Post Maintenance Testing
LER 16-008-00 for Susquehanna, Unit 1, Regarding Inoperability of Diesel Generator Due to Misalignment of MOC Switch Contacts Due to Inadequate Post Maintenance Testing
05000387/LER-2016-01116 May 2016Valve inoperability for a period longer than allowed by Technical Specifications
LER 16-011-00 for Susquehanna, Unit 1, Regarding Valve Inoperability for a Period Longer Than Allowed by Technical Specifications
05000387/LER-2016-00516 May 2016Secondary Containment Declared Inoperable Due to Airlock Doors Open Due to Human Performance Error
LER 16-005-00 for Susquehanna, Units 1 and 2, Regarding Secondary Containment Declared Inoperable Due to Airlock Doors Open Due to Human Performance Error
Fire Watch
05000387/LER-2016-00610 May 2016Implementation of Enforcement Guidance Memorandum (EGM) 11-003, Revision 3
LER 16-006-00 for Susquehanna, Unit 1, Regarding Implementation of Enforcement Guidance Memorandum (EGM) 11-003, Revision 3
05000387/LER-2016-00410 May 2016Momentary Loss of Secondary Containment due to Both Airlock Doors on Elevation 779 of the Unit 2 Reactor Building being Opened at the Same Time
LER 16-004-00 for Susquehanna, Unit 1, Regarding Momentary Loss of Secondary Containment Due to Both Airlock Doors on Elevation 779 of the Unit 2 Reactor Building Being Opened at the Same Time
05000387/LER-2016-0036 May 2016Unit 2 Zone 3 HVAC unable to maintain Zone 3 differential pressure greater than 0.25 in wg
LER 16-003-00 for Susquehanna, Unit 1, Regarding Unit 2 Zone 3 HVAC Unable to Maintain Zone 3 Differential Pressure Greater Than 0.25 in wg
Time of Discovery
05000387/LER-2016-0073 May 2016Inoperability of Swing Bus Transfer Switch Due to Deformed Bolt on Linkage
LER 16-007-00 for Susquehanna, Unit 1, Regarding Inoperability of Swing Bus Transfer Switch Due to Deformed Bolt on Linkage
05000387/LER-2016-00118 April 2016Secondary Containment Declared Inoperable Due to an Airlock Doors Open Due to Random Occurrence
LER 16-001-00 for Susquehanna, Unit 1, Regarding Secondary Containment Declared Inoperable Due to an Airlock Doors Open Due to Random Occurrence
05000387/LER-2016-00218 April 2016Secondary Containment Declared Inoperable Due to an Airlock Doors Open Due to Random Occurrence
LER 16-002-00 for Susquehanna, Unit 1, Regarding Secondary Containment Declared Inoperable Due to an Airlock Doors Open Due to Random Occurrence
05000387/LER-2015-00630 March 2016Loss of Safety Function due to Inoperability of Both Trains of the Standby Gas Treatment System and a Loss of Safety Function of the Control Room Emergency Outside Air Supply System due to Air Flow Controller found in Manual
LER 15-006-01 for Susquehanna, Unit 1, Regarding Loss of Safety Function due to Inoperability of Both Trains of the Standby Gas Treatment System and a Loss of Safety Function of the Control Room Emergency Outside Air Supply System due to Air Flow...
Time of Discovery
Reactor Vessel Water Level
05000387/LER-2015-00110 February 2016Inoperability of the 'B' Emergency Diesel Generator due to Fuel Oil Leakage
LER 15-001-01 for Susquehanna, Unit 1, Regarding Condition Prohibited by Technical Specifications Due to Drift of Reactor Pressure Steam Dome - Low Switches
Time of Discovery
Mission time
05000387/LER-2015-00326 January 2016Secondary Containment Inoperability Due to Failure to Meet Technical Specification Surveillance Requirement 3.6.4.1.1
LER 15-003-01 for Susquehanna, Unit 1, Regarding Secondary Containment Inoperability Due to Failure to Meet Technical Specification Surveillance Requirement 3.6.4.1.1
Time of Discovery
High winds
05000387/LER-2015-00911 January 2016Pressure Boundary Leakage From an Inadequate Weld Repair in Small Bore Pump Seal Vent Piping
LER 15-009-00 for Susquehanna, Unit 1, Regarding Pressure Boundary Leakage From an Inadequate Weld Repair in Small Bore Pump Seal Vent Piping
Non-Destructive Examination
Pressure Boundary Leakage
05000387/LER-2015-0078 January 2016Unit 1 'B' Inboard Main Steam Isolation Valve, HV141F022B closed during surveillance test which caused a SCRAM on Unit 1
LER 15-007-00 for Susquehanna, Unit 1, Regarding 'B' Inboard Main Steam Isolation Valve, HV141 F022B Closed During Surveillance Test Which Caused a SCRAM
PLA-7323, LER 015-001-00 for Susquehanna Regarding Inoperability of the B Emergency Diesel Generator Due to Fuel Oil Leakage28 April 2015LER 015-001-00 for Susquehanna Regarding Inoperability of the B Emergency Diesel Generator Due to Fuel Oil LeakageTime of Discovery
Mission time