NRC Form 3esA
type: Ontology
creation date: 2025-12-17T06:11:14-05:00
imports: http://semantic-mediawiki.org/swivt/1.0

NRC Form 3esA
type: Subject
page: https://kanterella.com/NRC_Form_3esA
wiki namespace: 0
wiki page content language: en
wiki page sort key: NRC Form 3esA

LER-1990-001-01, :on 900108,discovered That Several ERCW Valves Not Being Periodically Verified to Be Correct.Caused by Personnel Error During Procedure Revs & Workplan Reviews. Info Notice Issued to Workplan Reviewers
type: Subject
label: 05000327/LER-1990-001-01, :on 900108,discovered That Several ERCW Valves Not Being Periodically Verified to Be Correct.Caused by Personnel Error During Procedure Revs & Workplan Reviews. Info Notice Issued to Workplan Reviewers
page: https://kanterella.com/05000327/LER-2D1990-2D001-2D01-2C_-3Aon_900108-2Cdiscovered_That_Several_ERCW_Valves_Not_Being_Periodically_Verified_to_Be_Correct.Caused_by_Personnel_Error_During_Procedure_Rev…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000327/LER-1990-001-01, :on 900108,discovered That Several ERCW Valves Not Being Periodically Verified to Be Correct.Caused by Personnel Error During Procedure Revs & Workplan Reviews. Info Notice Issued to Workplan Reviewers

LER-1989-004-01, :on 890209,condensate Storage Tank Decreased from 26.7 Ft to 10.1 Ft.Caused by Mechanical Failure of Condensate Head Tank Heat Trace.Heat Trace on Condensate Head Tank Repaired
type: Subject
label: 05000259/LER-1989-004-01, :on 890209,condensate Storage Tank Decreased from 26.7 Ft to 10.1 Ft.Caused by Mechanical Failure of Condensate Head Tank Heat Trace.Heat Trace on Condensate Head Tank Repaired
page: https://kanterella.com/05000259/LER-2D1989-2D004-2D01-2C_-3Aon_890209-2Ccondensate_Storage_Tank_Decreased_from_26.7_Ft_to_10.1_Ft.Caused_by_Mechanical_Failure_of_Condensate_Head_Tank_Heat_Trace.Heat_T…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000259/LER-1989-004-01, :on 890209,condensate Storage Tank Decreased from 26.7 Ft to 10.1 Ft.Caused by Mechanical Failure of Condensate Head Tank Heat Trace.Heat Trace on Condensate Head Tank Repaired

LER-1989-005-01, :on 890830,operations Personnel Observed That Voltage of Cell 71 of Station Storage Battery Decreased More than 0.1 Volts Below Baseline Voltage Required by Recovery Operation Plan.Caused by Degradation of Cell
type: Subject
label: 05000320/LER-1989-005-01, :on 890830,operations Personnel Observed That Voltage of Cell 71 of Station Storage Battery Decreased More than 0.1 Volts Below Baseline Voltage Required by Recovery Operation Plan.Caused by Degradation of Cell
page: https://kanterella.com/05000320/LER-2D1989-2D005-2D01-2C_-3Aon_890830-2Coperations_Personnel_Observed_That_Voltage_of_Cell_71_of_Station_Storage_Battery_Decreased_More_than_0.1_Volts_Below_Baseline_Vo…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000320/LER-1989-005-01, :on 890830,operations Personnel Observed That Voltage of Cell 71 of Station Storage Battery Decreased More than 0.1 Volts Below Baseline Voltage Required by Recovery Operation Plan.Caused by Degradation of Cell

LER-1989-004-01, :on 890405,determined That One Steam Generator Tube of Initial Sample Group Was Defective During 1989 Refueling Outage.Caused by Primary Water Stress Corrosion Cracking.Tubes Susceptible to Failure Plugged
type: Subject
label: 05000338/LER-1989-004-01, :on 890405,determined That One Steam Generator Tube of Initial Sample Group Was Defective During 1989 Refueling Outage.Caused by Primary Water Stress Corrosion Cracking.Tubes Susceptible to Failure Plugged
page: https://kanterella.com/05000338/LER-2D1989-2D004-2D01-2C_-3Aon_890405-2Cdetermined_That_One_Steam_Generator_Tube_of_Initial_Sample_Group_Was_Defective_During_1989_Refueling_Outage.Caused_by_Primary_Wa…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000338/LER-1989-004-01, :on 890405,determined That One Steam Generator Tube of Initial Sample Group Was Defective During 1989 Refueling Outage.Caused by Primary Water Stress Corrosion Cracking.Tubes Susceptible to Failure Plugged

safety-related Equipment Discovered During Implementation of Design Change 87-190.Caused by Existence of Unexpected GE Supplied Subj Configurations
type: Subject
label: 05000298/LER-1989-021, :on 890602,undocumented Wiring Configurations Associated w/safety-related Equipment Discovered During Implementation of Design Change 87-190.Caused by Existence of Unexpected GE Supplied Subj Configurations
page: https://kanterella.com/05000298/LER-2D1989-2D021-2C_-3Aon_890602-2Cundocumented_Wiring_Configurations_Associated_w/safety-2Drelated_Equipment_Discovered_During_Implementation_of_Design_Change_87-2D190…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000298/LER-1989-021, :on 890602,undocumented Wiring Configurations Associated w/safety-related Equipment Discovered During Implementation of Design Change 87-190.Caused by Existence of Unexpected GE Supplied Subj Configurations

LER-1988-030, :on 880517,operator Reported That Water Was Flowing Into Loop C Room from Penetration of Reactor Coolant Loop Through Shield Wall.Cause Unknown.Backup Nitrogen Supply Restored to Inflatable Seal
type: Subject
label: 05000280/LER-1988-030, :on 880517,operator Reported That Water Was Flowing Into Loop C Room from Penetration of Reactor Coolant Loop Through Shield Wall.Cause Unknown.Backup Nitrogen Supply Restored to Inflatable Seal
page: https://kanterella.com/05000280/LER-2D1988-2D030-2C_-3Aon_880517-2Coperator_Reported_That_Water_Was_Flowing_Into_Loop_C_Room_from_Penetration_of_Reactor_Coolant_Loop_Through_Shield_Wall.Cause_Unknown.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000280/LER-1988-030, :on 880517,operator Reported That Water Was Flowing Into Loop C Room from Penetration of Reactor Coolant Loop Through Shield Wall.Cause Unknown.Backup Nitrogen Supply Restored to Inflatable Seal

LER-1989-001-03, :on 890214,momentary Initiation Signal Generated & HPCI Sys auto-started as Designed But Remained in Min Flow Mode & Did Not Inject Into Reactor Pressure Vessel.Caused by Spurious Closure Signal
type: Subject
label: 05000324/LER-1989-001-03, :on 890214,momentary Initiation Signal Generated & HPCI Sys auto-started as Designed But Remained in Min Flow Mode & Did Not Inject Into Reactor Pressure Vessel.Caused by Spurious Closure Signal
page: https://kanterella.com/05000324/LER-2D1989-2D001-2D03-2C_-3Aon_890214-2Cmomentary_Initiation_Signal_Generated_-26_HPCI_Sys_auto-2Dstarted_as_Designed_But_Remained_in_Min_Flow_Mode_-26_Did_Not_Inject_I…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000324/LER-1989-001-03, :on 890214,momentary Initiation Signal Generated & HPCI Sys auto-started as Designed But Remained in Min Flow Mode & Did Not Inject Into Reactor Pressure Vessel.Caused by Spurious Closure Signal

LER-1986-017-01, :on 860911,actuation of Reactor Protection Sys Initiated Automatic Reactor Trip.Caused by Effects of Reactor Coolant Pump Speed Transient on Core Protection Calculators (Cpc).Cpc Software Updated
type: Subject
label: 05000529/LER-1986-017-01, :on 860911,actuation of Reactor Protection Sys Initiated Automatic Reactor Trip.Caused by Effects of Reactor Coolant Pump Speed Transient on Core Protection Calculators (Cpc).Cpc Software Updated
page: https://kanterella.com/05000529/LER-2D1986-2D017-2D01-2C_-3Aon_860911-2Cactuation_of_Reactor_Protection_Sys_Initiated_Automatic_Reactor_Trip.Caused_by_Effects_of_Reactor_Coolant_Pump_Speed_Transient_o…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000529/LER-1986-017-01, :on 860911,actuation of Reactor Protection Sys Initiated Automatic Reactor Trip.Caused by Effects of Reactor Coolant Pump Speed Transient on Core Protection Calculators (Cpc).Cpc Software Updated

LER-1987-009-02, :on 870415,reactor Tripped Due to Turbine Tripped Signal Generated While Station Personnel Testing Turbine auto-stop Oil Pressure Switch.Caused by Design Deficiency.Preventive Maint Code Changed
type: Subject
label: 05000369/LER-1987-009-02, :on 870415,reactor Tripped Due to Turbine Tripped Signal Generated While Station Personnel Testing Turbine auto-stop Oil Pressure Switch.Caused by Design Deficiency.Preventive Maint Code Changed
page: https://kanterella.com/05000369/LER-2D1987-2D009-2D02-2C_-3Aon_870415-2Creactor_Tripped_Due_to_Turbine_Tripped_Signal_Generated_While_Station_Personnel_Testing_Turbine_auto-2Dstop_Oil_Pressure_Switch.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000369/LER-1987-009-02, :on 870415,reactor Tripped Due to Turbine Tripped Signal Generated While Station Personnel Testing Turbine auto-stop Oil Pressure Switch.Caused by Design Deficiency.Preventive Maint Code Changed

LER-1986-028, :on 861021,58 Out of 88 Seismic Class Is Supports on Standby Gas Treatment Sys Suction Ductwork Found Structurally Inadequate.Caused by Undocumented Design Changes.Mods Immediately Initiated
type: Subject
label: 05000298/LER-1986-028, :on 861021,58 Out of 88 Seismic Class Is Supports on Standby Gas Treatment Sys Suction Ductwork Found Structurally Inadequate.Caused by Undocumented Design Changes.Mods Immediately Initiated
page: https://kanterella.com/05000298/LER-2D1986-2D028-2C_-3Aon_861021-2C58_Out_of_88_Seismic_Class_Is_Supports_on_Standby_Gas_Treatment_Sys_Suction_Ductwork_Found_Structurally_Inadequate.Caused_by_Undocume…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000298/LER-1986-028, :on 861021,58 Out of 88 Seismic Class Is Supports on Standby Gas Treatment Sys Suction Ductwork Found Structurally Inadequate.Caused by Undocumented Design Changes.Mods Immediately Initiated

LER-1986-022, :on 860603,feedwater Isolation Occurred Due to Malfunction of Reactor Trip Breaker Control Switch.Operator Update Issued Addressing Proper Method of Manipulating Breaker Control Switches.Switch Will Also Be Replaced
type: Subject
label: 05000414/LER-1986-022, :on 860603,feedwater Isolation Occurred Due to Malfunction of Reactor Trip Breaker Control Switch.Operator Update Issued Addressing Proper Method of Manipulating Breaker Control Switches.Switch Will Also Be Replaced
page: https://kanterella.com/05000414/LER-2D1986-2D022-2C_-3Aon_860603-2Cfeedwater_Isolation_Occurred_Due_to_Malfunction_of_Reactor_Trip_Breaker_Control_Switch.Operator_Update_Issued_Addressing_Proper_Metho…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000414/LER-1986-022, :on 860603,feedwater Isolation Occurred Due to Malfunction of Reactor Trip Breaker Control Switch.Operator Update Issued Addressing Proper Method of Manipulating Breaker Control Switches.Switch Will Also Be Replaced

05000327/LER-1999-001-04, :on 990415,exceedance of AOT Occurred Due to Failure of Centrifugal Charging Pump.Rotating Element Was Replaced,Testing Was Completed & Pump Was Returned to Svc
type: Subject
page: https://kanterella.com/05000327/LER-2D1999-2D001-2D04-2C_-3Aon_990415-2Cexceedance_of_AOT_Occurred_Due_to_Failure_of_Centrifugal_Charging_Pump.Rotating_Element_Was_Replaced-2CTesting_Was_Completed_-26…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000327/LER-1999-001-04, :on 990415,exceedance of AOT Occurred Due to Failure of Centrifugal Charging Pump.Rotating Element Was Replaced,Testing Was Completed & Pump Was Returned to Svc

LER-1998-004-01, :on 981005,noted That full-in Position Indicating Light Did Not Extinguish as Expected When CR 38-15 Was Withdrawn.Caused by Personnel Error.Jumper Was Removed from RPIS Circuit Card for Rod 38-15
type: Subject
label: 05000366/LER-1998-004-01, :on 981005,noted That full-in Position Indicating Light Did Not Extinguish as Expected When CR 38-15 Was Withdrawn.Caused by Personnel Error.Jumper Was Removed from RPIS Circuit Card for Rod 38-15
page: https://kanterella.com/05000366/LER-2D1998-2D004-2D01-2C_-3Aon_981005-2Cnoted_That_full-2Din_Position_Indicating_Light_Did_Not_Extinguish_as_Expected_When_CR_38-2D15_Was_Withdrawn.Caused_by_Personnel_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000366/LER-1998-004-01, :on 981005,noted That full-in Position Indicating Light Did Not Extinguish as Expected When CR 38-15 Was Withdrawn.Caused by Personnel Error.Jumper Was Removed from RPIS Circuit Card for Rod 38-15

LER-1999-003-01, :on 990320,noted That Plant Operated with Average Planear LHGR Exceeding TS Limits.Caused by Inadequate Interface Design Between Color Graphics Terminal & 3-D Monicore Sys.Lowered Reactor Power.With
type: Subject
label: 05000220/LER-1999-003-01, :on 990320,noted That Plant Operated with Average Planear LHGR Exceeding TS Limits.Caused by Inadequate Interface Design Between Color Graphics Terminal & 3-D Monicore Sys.Lowered Reactor Power.With
page: https://kanterella.com/05000220/LER-2D1999-2D003-2D01-2C_-3Aon_990320-2Cnoted_That_Plant_Operated_with_Average_Planear_LHGR_Exceeding_TS_Limits.Caused_by_Inadequate_Interface_Design_Between_Color_Grap…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000220/LER-1999-003-01, :on 990320,noted That Plant Operated with Average Planear LHGR Exceeding TS Limits.Caused by Inadequate Interface Design Between Color Graphics Terminal & 3-D Monicore Sys.Lowered Reactor Power.With

LER-1987-003, :on 870225,both Trains of Standby Gas Treatment Sys Inoperable for 3 H.Caused by Personnel Error.Memorandum Issued to All Plant Personnel Reiterating Need for Attention to Details
type: Subject
label: 05000416/LER-1987-003, :on 870225,both Trains of Standby Gas Treatment Sys Inoperable for 3 H.Caused by Personnel Error.Memorandum Issued to All Plant Personnel Reiterating Need for Attention to Details
page: https://kanterella.com/05000416/LER-2D1987-2D003-2C_-3Aon_870225-2Cboth_Trains_of_Standby_Gas_Treatment_Sys_Inoperable_for_3_H.Caused_by_Personnel_Error.Memorandum_Issued_to_All_Plant_Personnel_Reiter…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000416/LER-1987-003, :on 870225,both Trains of Standby Gas Treatment Sys Inoperable for 3 H.Caused by Personnel Error.Memorandum Issued to All Plant Personnel Reiterating Need for Attention to Details

LER-1988-018, :on 880405,channel Check Surveillance for Containment post-accident Pressure Instruments Missed. Caused by Failure to Recognize That Tech Spec 3.3.3.6 Requirements Met.Tech Spec 3.3.3.6 Entered
type: Subject
label: 05000338/LER-1988-018, :on 880405,channel Check Surveillance for Containment post-accident Pressure Instruments Missed. Caused by Failure to Recognize That Tech Spec 3.3.3.6 Requirements Met.Tech Spec 3.3.3.6 Entered
page: https://kanterella.com/05000338/LER-2D1988-2D018-2C_-3Aon_880405-2Cchannel_Check_Surveillance_for_Containment_post-2Daccident_Pressure_Instruments_Missed._Caused_by_Failure_to_Recognize_That_Tech_Spec…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000338/LER-1988-018, :on 880405,channel Check Surveillance for Containment post-accident Pressure Instruments Missed. Caused by Failure to Recognize That Tech Spec 3.3.3.6 Requirements Met.Tech Spec 3.3.3.6 Entered

LER-1985-026-01, :on 851224,480-volt Power Supply Breaker to Backup Group 4A Pressurizer Heaters Discovered to Have No Light Indication.Caused by Backing Off Action by Arcing Contacts.Breaker Manually Tripped
type: Subject
label: 05000251/LER-1985-026-01, :on 851224,480-volt Power Supply Breaker to Backup Group 4A Pressurizer Heaters Discovered to Have No Light Indication.Caused by Backing Off Action by Arcing Contacts.Breaker Manually Tripped
page: https://kanterella.com/05000251/LER-2D1985-2D026-2D01-2C_-3Aon_851224-2C480-2Dvolt_Power_Supply_Breaker_to_Backup_Group_4A_Pressurizer_Heaters_Discovered_to_Have_No_Light_Indication.Caused_by_Backing_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000251/LER-1985-026-01, :on 851224,480-volt Power Supply Breaker to Backup Group 4A Pressurizer Heaters Discovered to Have No Light Indication.Caused by Backing Off Action by Arcing Contacts.Breaker Manually Tripped

Relief Valves,All Six Valves Lifted at Pressures Exceeding Tech Spec Limit.Caused by High Friction at Labyrinth Seal in Valve Topworks
type: Subject
label: 05000245/LER-1985-029, :on 851126,during Bench Checks of Main Steam Safety/Relief Valves,All Six Valves Lifted at Pressures Exceeding Tech Spec Limit.Caused by High Friction at Labyrinth Seal in Valve Topworks
page: https://kanterella.com/05000245/LER-2D1985-2D029-2C_-3Aon_851126-2Cduring_Bench_Checks_of_Main_Steam_Safety/Relief_Valves-2CAll_Six_Valves_Lifted_at_Pressures_Exceeding_Tech_Spec_Limit.Caused_by_High_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000245/LER-1985-029, :on 851126,during Bench Checks of Main Steam Safety/Relief Valves,All Six Valves Lifted at Pressures Exceeding Tech Spec Limit.Caused by High Friction at Labyrinth Seal in Valve Topworks

LER-1997-008, :on 970307,discovered Potential for Possible Pump Failure & Dose Consequences.Caused by Design Errors. Will Keep Plant in Shutdown Until Design Deficiencies Are Resolved & Will Initiate Plant Modification
type: Subject
label: 05000302/LER-1997-008, :on 970307,discovered Potential for Possible Pump Failure & Dose Consequences.Caused by Design Errors. Will Keep Plant in Shutdown Until Design Deficiencies Are Resolved & Will Initiate Plant Modification
page: https://kanterella.com/05000302/LER-2D1997-2D008-2C_-3Aon_970307-2Cdiscovered_Potential_for_Possible_Pump_Failure_-26_Dose_Consequences.Caused_by_Design_Errors._Will_Keep_Plant_in_Shutdown_Until_Desig…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000302/LER-1997-008, :on 970307,discovered Potential for Possible Pump Failure & Dose Consequences.Caused by Design Errors. Will Keep Plant in Shutdown Until Design Deficiencies Are Resolved & Will Initiate Plant Modification

05000370/LER-1985-025-02, :on 851022,discovered That Encl to Procedure, Quarterly Surveillance Items Re Refueling Canal Drains Not Completed by 851018 Per Tech Spec 4.4.4.2.Caused by Personnel Error
type: Subject
page: https://kanterella.com/05000370/LER-2D1985-2D025-2D02-2C_-3Aon_851022-2Cdiscovered_That_Encl_to_Procedure-2C_Quarterly_Surveillance_Items_Re_Refueling_Canal_Drains_Not_Completed_by_851018_Per_Tech_Spe…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000370/LER-1985-025-02, :on 851022,discovered That Encl to Procedure, Quarterly Surveillance Items Re Refueling Canal Drains Not Completed by 851018 Per Tech Spec 4.4.4.2.Caused by Personnel Error

LER-1985-003, :on 850423,outside Recirculation Spray Pump a Suction Valve Found Degraded & Pump B Valve Found Inoperable.Caused by Inadequate Sector Gear & Sheared Pins in Extension Shafts.Pins Replaced
type: Subject
label: 05000281/LER-1985-003, :on 850423,outside Recirculation Spray Pump a Suction Valve Found Degraded & Pump B Valve Found Inoperable.Caused by Inadequate Sector Gear & Sheared Pins in Extension Shafts.Pins Replaced
page: https://kanterella.com/05000281/LER-2D1985-2D003-2C_-3Aon_850423-2Coutside_Recirculation_Spray_Pump_a_Suction_Valve_Found_Degraded_-26_Pump_B_Valve_Found_Inoperable.Caused_by_Inadequate_Sector_Gear_-2…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000281/LER-1985-003, :on 850423,outside Recirculation Spray Pump a Suction Valve Found Degraded & Pump B Valve Found Inoperable.Caused by Inadequate Sector Gear & Sheared Pins in Extension Shafts.Pins Replaced

LER-1985-016-01, :on 851126 & 1201,automatic Reactor Trips Occurred During 50- Load Rejection Startup Testing.Caused by Steam Dump Control Sys & Feedwater Control Sys Settings Inadequately Adjusted,Respectively
type: Subject
label: 05000323/LER-1985-016-01, :on 851126 & 1201,automatic Reactor Trips Occurred During 50% Load Rejection Startup Testing.Caused by Steam Dump Control Sys & Feedwater Control Sys Settings Inadequately Adjusted,Respectively
page: https://kanterella.com/05000323/LER-2D1985-2D016-2D01-2C_-3Aon_851126_-26_1201-2Cautomatic_Reactor_Trips_Occurred_During_50-_Load_Rejection_Startup_Testing.Caused_by_Steam_Dump_Control_Sys_-26_Feedwat…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000323/LER-1985-016-01, :on 851126 & 1201,automatic Reactor Trips Occurred During 50% Load Rejection Startup Testing.Caused by Steam Dump Control Sys & Feedwater Control Sys Settings Inadequately Adjusted,Respectively

LER-1997-001-04, :on 970131,failed to Perform Surveillance on Testing on Hydrostatic on Dg.Caused by Inadequate Tracking Mechanism.Developed & Executed Special Surveillance Procedures & Will Enhance TS Interpretation
type: Subject
label: 05000454/LER-1997-001-04, :on 970131,failed to Perform Surveillance on Testing on Hydrostatic on Dg.Caused by Inadequate Tracking Mechanism.Developed & Executed Special Surveillance Procedures & Will Enhance TS Interpretation
page: https://kanterella.com/05000454/LER-2D1997-2D001-2D04-2C_-3Aon_970131-2Cfailed_to_Perform_Surveillance_on_Testing_on_Hydrostatic_on_Dg.Caused_by_Inadequate_Tracking_Mechanism.Developed_-26_Executed_Sp…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000454/LER-1997-001-04, :on 970131,failed to Perform Surveillance on Testing on Hydrostatic on Dg.Caused by Inadequate Tracking Mechanism.Developed & Executed Special Surveillance Procedures & Will Enhance TS Interpretation

LER-1985-031-03, :on 850727,east Bank Scram Discharge Vol hi-hi Water Level Scram Occurred.Caused by Steam Generated from Reactor Bldg Drain Header.Trip Setpoint of Instruments Lowered & Engineering Analysis Performed
type: Subject
label: 05000237/LER-1985-031-03, :on 850727,east Bank Scram Discharge Vol hi-hi Water Level Scram Occurred.Caused by Steam Generated from Reactor Bldg Drain Header.Trip Setpoint of Instruments Lowered & Engineering Analysis Performed
page: https://kanterella.com/05000237/LER-2D1985-2D031-2D03-2C_-3Aon_850727-2Ceast_Bank_Scram_Discharge_Vol_hi-2Dhi_Water_Level_Scram_Occurred.Caused_by_Steam_Generated_from_Reactor_Bldg_Drain_Header.Trip_S…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000237/LER-1985-031-03, :on 850727,east Bank Scram Discharge Vol hi-hi Water Level Scram Occurred.Caused by Steam Generated from Reactor Bldg Drain Header.Trip Setpoint of Instruments Lowered & Engineering Analysis Performed

Spare Component
type: Subject
label: 05000388/LER-1985-021-01, :on 850630,neutral Overvoltage Occurred in Main Generator,Causing Primary Lockout.Caused by Failure of Phase C Main Transformer Low Voltage Bushing.Bushing Replaced W/Spare Component
page: https://kanterella.com/05000388/LER-2D1985-2D021-2D01-2C_-3Aon_850630-2Cneutral_Overvoltage_Occurred_in_Main_Generator-2CCausing_Primary_Lockout.Caused_by_Failure_of_Phase_C_Main_Transformer_Low_Volta…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000388/LER-1985-021-01, :on 850630,neutral Overvoltage Occurred in Main Generator,Causing Primary Lockout.Caused by Failure of Phase C Main Transformer Low Voltage Bushing.Bushing Replaced W/Spare Component

LER-1996-018, :on 961014,incorrect Torque Value for Control Rod Drive Hydraulic Control Units Was Specified by Supplier. Caused by Lack of Attention to Detail.All Hold Down Bolts on CRD HCUs Were Replaced
type: Subject
label: 05000461/LER-1996-018, :on 961014,incorrect Torque Value for Control Rod Drive Hydraulic Control Units Was Specified by Supplier. Caused by Lack of Attention to Detail.All Hold Down Bolts on CRD HCUs Were Replaced
page: https://kanterella.com/05000461/LER-2D1996-2D018-2C_-3Aon_961014-2Cincorrect_Torque_Value_for_Control_Rod_Drive_Hydraulic_Control_Units_Was_Specified_by_Supplier._Caused_by_Lack_of_Attention_to_Detail…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000461/LER-1996-018, :on 961014,incorrect Torque Value for Control Rod Drive Hydraulic Control Units Was Specified by Supplier. Caused by Lack of Attention to Detail.All Hold Down Bolts on CRD HCUs Were Replaced

Or Ductwork Supports Spanned Bldg Seismic Isolation Boundaries.Caused by Differential Movement Not Factored in Design of Ductwork Sys
type: Subject
label: 05000346/LER-1984-021, :on 841220,Q-listed & Seismic Class I Ductwork &/Or Ductwork Supports Spanned Bldg Seismic Isolation Boundaries.Caused by Differential Movement Not Factored in Design of Ductwork Sys
page: https://kanterella.com/05000346/LER-2D1984-2D021-2C_-3Aon_841220-2CQ-2Dlisted_-26_Seismic_Class_I_Ductwork_-26/Or_Ductwork_Supports_Spanned_Bldg_Seismic_Isolation_Boundaries.Caused_by_Differential_Mov…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000346/LER-1984-021, :on 841220,Q-listed & Seismic Class I Ductwork &/Or Ductwork Supports Spanned Bldg Seismic Isolation Boundaries.Caused by Differential Movement Not Factored in Design of Ductwork Sys

O Verification of Secondary Containment Integrity.Caused by Combination of Procedural & Personnel Errors
type: Subject
label: 05000298/LER-1985-001, :on 840922,during Secondary Containment Leak Test,Fuel Handling Operations Conducted W/O Verification of Secondary Containment Integrity.Caused by Combination of Procedural & Personnel Errors
page: https://kanterella.com/05000298/LER-2D1985-2D001-2C_-3Aon_840922-2Cduring_Secondary_Containment_Leak_Test-2CFuel_Handling_Operations_Conducted_W/O_Verification_of_Secondary_Containment_Integrity.Cause…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000298/LER-1985-001, :on 840922,during Secondary Containment Leak Test,Fuel Handling Operations Conducted W/O Verification of Secondary Containment Integrity.Caused by Combination of Procedural & Personnel Errors

LER-1995-016, :on 950708-09,SDC Bypass Event Occurred, Rendering SDC Mode of RHR Sys Inoperable Due to Procedural non-compliance & Inadequate Operator Knowledge,Skills & Training.Special Training on Event Conducted
type: Subject
label: 05000354/LER-1995-016, :on 950708-09,SDC Bypass Event Occurred, Rendering SDC Mode of RHR Sys Inoperable Due to Procedural non-compliance & Inadequate Operator Knowledge,Skills & Training.Special Training on Event Conducted
page: https://kanterella.com/05000354/LER-2D1995-2D016-2C_-3Aon_950708-2D09-2CSDC_Bypass_Event_Occurred-2C_Rendering_SDC_Mode_of_RHR_Sys_Inoperable_Due_to_Procedural_non-2Dcompliance_-26_Inadequate_Operator…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000354/LER-1995-016, :on 950708-09,SDC Bypass Event Occurred, Rendering SDC Mode of RHR Sys Inoperable Due to Procedural non-compliance & Inadequate Operator Knowledge,Skills & Training.Special Training on Event Conducted

LER-1992-007, :on 920511,determined That TOL Settings for Certain Motors May Not Be Conservative for Extended Operation Undervoltage Conditions.Caused by Applied Voltage. TOL Settings Were Optimized
type: Subject
label: 05000416/LER-1992-007, :on 920511,determined That TOL Settings for Certain Motors May Not Be Conservative for Extended Operation Undervoltage Conditions.Caused by Applied Voltage. TOL Settings Were Optimized
page: https://kanterella.com/05000416/LER-2D1992-2D007-2C_-3Aon_920511-2Cdetermined_That_TOL_Settings_for_Certain_Motors_May_Not_Be_Conservative_for_Extended_Operation_Undervoltage_Conditions.Caused_by_Appl…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000416/LER-1992-007, :on 920511,determined That TOL Settings for Certain Motors May Not Be Conservative for Extended Operation Undervoltage Conditions.Caused by Applied Voltage. TOL Settings Were Optimized

LER-1984-009, :on 840706,Smoke Detection Instrumentation Test Ost 1.33.16 Found Only Partially Completed,Since Containment Smoke Detectors Not Tested.Caused by Inadequate Procedure Review.Administrative Procedures Revised
type: Subject
label: 05000334/LER-1984-009, :on 840706,Smoke Detection Instrumentation Test Ost 1.33.16 Found Only Partially Completed,Since Containment Smoke Detectors Not Tested.Caused by Inadequate Procedure Review.Administrative Procedures Revised
page: https://kanterella.com/05000334/LER-2D1984-2D009-2C_-3Aon_840706-2CSmoke_Detection_Instrumentation_Test_Ost_1.33.16_Found_Only_Partially_Completed-2CSince_Containment_Smoke_Detectors_Not_Tested.Caused…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000334/LER-1984-009, :on 840706,Smoke Detection Instrumentation Test Ost 1.33.16 Found Only Partially Completed,Since Containment Smoke Detectors Not Tested.Caused by Inadequate Procedure Review.Administrative Procedures Revised

LER-1995-013-04, :on 951012,fire Protection App R Design Discrepancies Occurred Due to Inadequate Evaluations During Preparation of Original Analysis.Maintained Hourly Fire Watches for All Fire Zones
type: Subject
label: 05000456/LER-1995-013-04, :on 951012,fire Protection App R Design Discrepancies Occurred Due to Inadequate Evaluations During Preparation of Original Analysis.Maintained Hourly Fire Watches for All Fire Zones
page: https://kanterella.com/05000456/LER-2D1995-2D013-2D04-2C_-3Aon_951012-2Cfire_Protection_App_R_Design_Discrepancies_Occurred_Due_to_Inadequate_Evaluations_During_Preparation_of_Original_Analysis.Mainta…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000456/LER-1995-013-04, :on 951012,fire Protection App R Design Discrepancies Occurred Due to Inadequate Evaluations During Preparation of Original Analysis.Maintained Hourly Fire Watches for All Fire Zones

LER-1984-005-03, :on 840814,trip Occurred When Instrument Air Line to Powdex Outlet Valves Accidentally Sheared.Caused by Attempt to Straighten Bend Which Resulted from Work on Pipe Above Instrument Air Line
type: Subject
label: 05000287/LER-1984-005-03, :on 840814,trip Occurred When Instrument Air Line to Powdex Outlet Valves Accidentally Sheared.Caused by Attempt to Straighten Bend Which Resulted from Work on Pipe Above Instrument Air Line
page: https://kanterella.com/05000287/LER-2D1984-2D005-2D03-2C_-3Aon_840814-2Ctrip_Occurred_When_Instrument_Air_Line_to_Powdex_Outlet_Valves_Accidentally_Sheared.Caused_by_Attempt_to_Straighten_Bend_Which_R…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000287/LER-1984-005-03, :on 840814,trip Occurred When Instrument Air Line to Powdex Outlet Valves Accidentally Sheared.Caused by Attempt to Straighten Bend Which Resulted from Work on Pipe Above Instrument Air Line

05000338/LER-1992-005, :on 920113,timers Drifted Outside Setpoint Tolerance Listed,Per Tech Spec Table 4.8-1.Caused by Setpoint Drift.Timers Reset & Successfully Retested.W/
type: Subject
page: https://kanterella.com/05000338/LER-2D1992-2D005-2C_-3Aon_920113-2Ctimers_Drifted_Outside_Setpoint_Tolerance_Listed-2CPer_Tech_Spec_Table_4.8-2D1.Caused_by_Setpoint_Drift.Timers_Reset_-26_Successfully…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000338/LER-1992-005, :on 920113,timers Drifted Outside Setpoint Tolerance Listed,Per Tech Spec Table 4.8-1.Caused by Setpoint Drift.Timers Reset & Successfully Retested.W/

LER-1984-001-04, :on 840301,boron Concentrations of Two Independent Core Flood Tank 1A Samples Less than Tech Spec Requirements.Caused by Lack of Adequate Mgt Control Over Known Problem.Procedures Revised
type: Subject
label: 05000269/LER-1984-001-04, :on 840301,boron Concentrations of Two Independent Core Flood Tank 1A Samples Less than Tech Spec Requirements.Caused by Lack of Adequate Mgt Control Over Known Problem.Procedures Revised
page: https://kanterella.com/05000269/LER-2D1984-2D001-2D04-2C_-3Aon_840301-2Cboron_Concentrations_of_Two_Independent_Core_Flood_Tank_1A_Samples_Less_than_Tech_Spec_Requirements.Caused_by_Lack_of_Adequate_M…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000269/LER-1984-001-04, :on 840301,boron Concentrations of Two Independent Core Flood Tank 1A Samples Less than Tech Spec Requirements.Caused by Lack of Adequate Mgt Control Over Known Problem.Procedures Revised

LER-1984-021, :on 840322,spent Fuel Pit High Radiation Alarm Actuated,Which Caused Auxiliary Bldg Isolation to Occur. Caused by Movement of Contaminated C-zone Clothing & Trash. Alarm Cleared & Monitor Returned to Svc
type: Subject
label: 05000327/LER-1984-021, :on 840322,spent Fuel Pit High Radiation Alarm Actuated,Which Caused Auxiliary Bldg Isolation to Occur. Caused by Movement of Contaminated C-zone Clothing & Trash. Alarm Cleared & Monitor Returned to Svc
page: https://kanterella.com/05000327/LER-2D1984-2D021-2C_-3Aon_840322-2Cspent_Fuel_Pit_High_Radiation_Alarm_Actuated-2CWhich_Caused_Auxiliary_Bldg_Isolation_to_Occur._Caused_by_Movement_of_Contaminated_C-2…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000327/LER-1984-021, :on 840322,spent Fuel Pit High Radiation Alarm Actuated,Which Caused Auxiliary Bldg Isolation to Occur. Caused by Movement of Contaminated C-zone Clothing & Trash. Alarm Cleared & Monitor Returned to Svc

LER-1994-005-03, :on 941005,containment Isolation Valve 1RC-7 Rendered Technically Inoperable Due to Change Mgt.Valves 1RC-5 & 6 Closed & Electrically Deactivated & Mechanical Maint Team Involved Counseled
type: Subject
label: 05000269/LER-1994-005-03, :on 941005,containment Isolation Valve 1RC-7 Rendered Technically Inoperable Due to Change Mgt.Valves 1RC-5 & 6 Closed & Electrically Deactivated & Mechanical Maint Team Involved Counseled
page: https://kanterella.com/05000269/LER-2D1994-2D005-2D03-2C_-3Aon_941005-2Ccontainment_Isolation_Valve_1RC-2D7_Rendered_Technically_Inoperable_Due_to_Change_Mgt.Valves_1RC-2D5_-26_6_Closed_-26_Electrical…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000269/LER-1994-005-03, :on 941005,containment Isolation Valve 1RC-7 Rendered Technically Inoperable Due to Change Mgt.Valves 1RC-5 & 6 Closed & Electrically Deactivated & Mechanical Maint Team Involved Counseled

05000445/LER-1990-023, :on 900808,reactor Tripped on Loss of Feedwater Flow.Caused by Loose Fuse in Main Feedwater Control Power Circuit.Corrective Maint Performed on Malfunctioning Fuse Clip
type: Subject
page: https://kanterella.com/05000445/LER-2D1990-2D023-2C_-3Aon_900808-2Creactor_Tripped_on_Loss_of_Feedwater_Flow.Caused_by_Loose_Fuse_in_Main_Feedwater_Control_Power_Circuit.Corrective_Maint_Performed_on_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000445/LER-1990-023, :on 900808,reactor Tripped on Loss of Feedwater Flow.Caused by Loose Fuse in Main Feedwater Control Power Circuit.Corrective Maint Performed on Malfunctioning Fuse Clip

LER-1990-019, :on 900726,source Range Flux Doubling Actuation Occurred Due to Spurious Source Range Signal Decrease.Cause Not Identified.Operation & Troubleshooting of Channel SR N32 Observed Indicating Correct Functioning
type: Subject
label: 05000445/LER-1990-019, :on 900726,source Range Flux Doubling Actuation Occurred Due to Spurious Source Range Signal Decrease.Cause Not Identified.Operation & Troubleshooting of Channel SR N32 Observed Indicating Correct Functioning
page: https://kanterella.com/05000445/LER-2D1990-2D019-2C_-3Aon_900726-2Csource_Range_Flux_Doubling_Actuation_Occurred_Due_to_Spurious_Source_Range_Signal_Decrease.Cause_Not_Identified.Operation_-26_Trouble…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000445/LER-1990-019, :on 900726,source Range Flux Doubling Actuation Occurred Due to Spurious Source Range Signal Decrease.Cause Not Identified.Operation & Troubleshooting of Channel SR N32 Observed Indicating Correct Functioning

LER-1990-017, :on 900527,main Feedwater Flow Control Valve Failed Closed,Resulting in Reduced Feedwater Flow & Decreasing Steam Generator Water Level.Caused by Failure of Solenoid Valve Coil.Solenoid Coil Replaced
type: Subject
label: 05000445/LER-1990-017, :on 900527,main Feedwater Flow Control Valve Failed Closed,Resulting in Reduced Feedwater Flow & Decreasing Steam Generator Water Level.Caused by Failure of Solenoid Valve Coil.Solenoid Coil Replaced
page: https://kanterella.com/05000445/LER-2D1990-2D017-2C_-3Aon_900527-2Cmain_Feedwater_Flow_Control_Valve_Failed_Closed-2CResulting_in_Reduced_Feedwater_Flow_-26_Decreasing_Steam_Generator_Water_Level.Caus…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000445/LER-1990-017, :on 900527,main Feedwater Flow Control Valve Failed Closed,Resulting in Reduced Feedwater Flow & Decreasing Steam Generator Water Level.Caused by Failure of Solenoid Valve Coil.Solenoid Coil Replaced

Control Room Ventilation Isolation Signals Received from Exhaust Radiation Monitor. Caused by Burned Out Lamp & Blown Fuse in Power Supply.Fuse & Lamp Replaced & Monitor Returned to Svc
type: Subject
label: 05000482/LER-1990-008, :on 900504,fuel Bldg/Control Room Ventilation Isolation Signals Received from Exhaust Radiation Monitor. Caused by Burned Out Lamp & Blown Fuse in Power Supply.Fuse & Lamp Replaced & Monitor Returned to Svc
page: https://kanterella.com/05000482/LER-2D1990-2D008-2C_-3Aon_900504-2Cfuel_Bldg/Control_Room_Ventilation_Isolation_Signals_Received_from_Exhaust_Radiation_Monitor._Caused_by_Burned_Out_Lamp_-26_Blown_Fus…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000482/LER-1990-008, :on 900504,fuel Bldg/Control Room Ventilation Isolation Signals Received from Exhaust Radiation Monitor. Caused by Burned Out Lamp & Blown Fuse in Power Supply.Fuse & Lamp Replaced & Monitor Returned to Svc

LER-1990-013, :on 900509,while Installing Jumpers Across Feedwater Pump Speed Controllers,Pump Coastdown Occurred, Resulting in Loss of Feedwater Flow & Reactor Trip.Caused by Inadequate Procedure Review.Review Performed
type: Subject
label: 05000445/LER-1990-013, :on 900509,while Installing Jumpers Across Feedwater Pump Speed Controllers,Pump Coastdown Occurred, Resulting in Loss of Feedwater Flow & Reactor Trip.Caused by Inadequate Procedure Review.Review Performed
page: https://kanterella.com/05000445/LER-2D1990-2D013-2C_-3Aon_900509-2Cwhile_Installing_Jumpers_Across_Feedwater_Pump_Speed_Controllers-2CPump_Coastdown_Occurred-2C_Resulting_in_Loss_of_Feedwater_Flow_-26…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000445/LER-1990-013, :on 900509,while Installing Jumpers Across Feedwater Pump Speed Controllers,Pump Coastdown Occurred, Resulting in Loss of Feedwater Flow & Reactor Trip.Caused by Inadequate Procedure Review.Review Performed

LER-1989-020, :on 891012,determined That Two of Four Component Cooling Water HXs Simultaneously Inoperable for More than 24 H.Caused by Inadequate Controls Re Return of Equipment to Svc.Standing Order Revised
type: Subject
label: 05000285/LER-1989-020, :on 891012,determined That Two of Four Component Cooling Water HXs Simultaneously Inoperable for More than 24 H.Caused by Inadequate Controls Re Return of Equipment to Svc.Standing Order Revised
page: https://kanterella.com/05000285/LER-2D1989-2D020-2C_-3Aon_891012-2Cdetermined_That_Two_of_Four_Component_Cooling_Water_HXs_Simultaneously_Inoperable_for_More_than_24_H.Caused_by_Inadequate_Controls_Re…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000285/LER-1989-020, :on 891012,determined That Two of Four Component Cooling Water HXs Simultaneously Inoperable for More than 24 H.Caused by Inadequate Controls Re Return of Equipment to Svc.Standing Order Revised

LER-1984-003, :on 840103,safety Injection Tanks 2 & 3 Fell Below Min Level.During Filling,Valves Closed.Caused by Residual Water Collected in Dry Ref Legs.Tanks Lowered,Legs Drained & Instruments Calibr
type: Subject
label: 05000336/LER-1984-003, :on 840103,safety Injection Tanks 2 & 3 Fell Below Min Level.During Filling,Valves Closed.Caused by Residual Water Collected in Dry Ref Legs.Tanks Lowered,Legs Drained & Instruments Calibr
page: https://kanterella.com/05000336/LER-2D1984-2D003-2C_-3Aon_840103-2Csafety_Injection_Tanks_2_-26_3_Fell_Below_Min_Level.During_Filling-2CValves_Closed.Caused_by_Residual_Water_Collected_in_Dry_Ref_Legs…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000336/LER-1984-003, :on 840103,safety Injection Tanks 2 & 3 Fell Below Min Level.During Filling,Valves Closed.Caused by Residual Water Collected in Dry Ref Legs.Tanks Lowered,Legs Drained & Instruments Calibr

LER-1987-005, :on 870110,while Primary Containment Inerting in Progress,Reactor Scram Occurred Due to Closure of Msivs. Caused by Inadequate Procedural Guidance.Operating Alarm Procedures Will Be Revised
type: Subject
label: 05000298/LER-1987-005, :on 870110,while Primary Containment Inerting in Progress,Reactor Scram Occurred Due to Closure of Msivs. Caused by Inadequate Procedural Guidance.Operating Alarm Procedures Will Be Revised
page: https://kanterella.com/05000298/LER-2D1987-2D005-2C_-3Aon_870110-2Cwhile_Primary_Containment_Inerting_in_Progress-2CReactor_Scram_Occurred_Due_to_Closure_of_Msivs._Caused_by_Inadequate_Procedural_Guid…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3esA
wiki page sort key: 05000298/LER-1987-005, :on 870110,while Primary Containment Inerting in Progress,Reactor Scram Occurred Due to Closure of Msivs. Caused by Inadequate Procedural Guidance.Operating Alarm Procedures Will Be Revised

NRC form
type: ObjectProperty
page: https://kanterella.com/Property-3ANRC_form
wiki namespace: 102
wiki page content language: en
wiki page sort key: NRC form
type: wpg