NRC Form 306A
type: Ontology
creation date: 2025-12-05T23:07:14-05:00
imports: http://semantic-mediawiki.org/swivt/1.0

NRC Form 306A
type: Subject
page: https://kanterella.com/NRC_Form_306A
wiki namespace: 0
wiki page content language: en
wiki page sort key: NRC Form 306A

05000325/LER-1990-002-01, :on 900127,common Control Bldg HVAC Sys Isolated & Transferred to Recirculation Mode as Result of Spurious Actuation of Chlorine Detector.Sensor Connection Checked
type: Subject
page: https://kanterella.com/05000325/LER-2D1990-2D002-2D01-2C_-3Aon_900127-2Ccommon_Control_Bldg_HVAC_Sys_Isolated_-26_Transferred_to_Recirculation_Mode_as_Result_of_Spurious_Actuation_of_Chlorine_Detector…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000325/LER-1990-002-01, :on 900127,common Control Bldg HVAC Sys Isolated & Transferred to Recirculation Mode as Result of Spurious Actuation of Chlorine Detector.Sensor Connection Checked

LER-1989-037, :on 891026,determined That Instrumentation Used to Balance HPI Flow Through Four Injection Lines During Small Break LOCA Inadequate.Caused by Inadequate Review of B&W Guidelines.Flow Instrument Installed
type: Subject
label: 05000302/LER-1989-037, :on 891026,determined That Instrumentation Used to Balance HPI Flow Through Four Injection Lines During Small Break LOCA Inadequate.Caused by Inadequate Review of B&W Guidelines.Flow Instrument Installed
page: https://kanterella.com/05000302/LER-2D1989-2D037-2C_-3Aon_891026-2Cdetermined_That_Instrumentation_Used_to_Balance_HPI_Flow_Through_Four_Injection_Lines_During_Small_Break_LOCA_Inadequate.Caused_by_In…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000302/LER-1989-037, :on 891026,determined That Instrumentation Used to Balance HPI Flow Through Four Injection Lines During Small Break LOCA Inadequate.Caused by Inadequate Review of B&W Guidelines.Flow Instrument Installed

LER-1993-011, :on 930624,experienced Reactor Trip Due to Loss of Load.Caused by Lack of Proper Job Planning,Lack of Formal Decision Making Process & Incomplete Communications.Training Will Be Provided to Operations Personnel
type: Subject
label: 05000285/LER-1993-011, :on 930624,experienced Reactor Trip Due to Loss of Load.Caused by Lack of Proper Job Planning,Lack of Formal Decision Making Process & Incomplete Communications.Training Will Be Provided to Operations Personnel
page: https://kanterella.com/05000285/LER-2D1993-2D011-2C_-3Aon_930624-2Cexperienced_Reactor_Trip_Due_to_Loss_of_Load.Caused_by_Lack_of_Proper_Job_Planning-2CLack_of_Formal_Decision_Making_Process_-26_Incom…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1993-011, :on 930624,experienced Reactor Trip Due to Loss of Load.Caused by Lack of Proper Job Planning,Lack of Formal Decision Making Process & Incomplete Communications.Training Will Be Provided to Operations Personnel

IA-92-382, Package Consisting of General Records Schedule 23,NRC Manual Chapter Bulletin 0231-30,NRC Manual Chapter 0231, Maint & Disposition of NRC Official Files & Records & Mgt Directive 3.53, NRC Records Mgt Program
type: Subject
page: https://kanterella.com/IA-2D92-2D382-2C_Package_Consisting_of_General_Records_Schedule_23-2CNRC_Manual_Chapter_Bulletin_0231-2D30-2CNRC_Manual_Chapter_0231-2C_Maint_-26_Disposition_of_NRC_Official_Fil…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: IA-92-382, Package Consisting of General Records Schedule 23,NRC Manual Chapter Bulletin 0231-30,NRC Manual Chapter 0231, Maint & Disposition of NRC Official Files & Records & Mgt Directive 3.53, NRC Records Mgt Program

ML20235X086
type: Subject
page: https://kanterella.com/ML20235X086
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: ML20235X086

ML20148L567
type: Subject
page: https://kanterella.com/ML20148L567
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: ML20148L567

ML20149E295
type: Subject
page: https://kanterella.com/ML20149E295
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: ML20149E295

Upgraded Model & Temporary Mod Performed to Bypass Logic for Valves
type: Subject
label: 05000410/LER-1988-014, :on 880313,reactor Scram & ESF Actuations Occurred.Caused by Equipment Failure Due to Design Deficiency.Transmitter Replaced W/Upgraded Model & Temporary Mod Performed to Bypass Logic for Valves
page: https://kanterella.com/05000410/LER-2D1988-2D014-2C_-3Aon_880313-2Creactor_Scram_-26_ESF_Actuations_Occurred.Caused_by_Equipment_Failure_Due_to_Design_Deficiency.Transmitter_Replaced_W/Upgraded_Model_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000410/LER-1988-014, :on 880313,reactor Scram & ESF Actuations Occurred.Caused by Equipment Failure Due to Design Deficiency.Transmitter Replaced W/Upgraded Model & Temporary Mod Performed to Bypass Logic for Valves

98-04. Corrective Actions:Need for Adding Applicable Action Statement for Tt & Feedwater Isolation Automatic Actuation Logic as Part of Conversion to Improved TS Will Be Assessed
type: Subject
label: RC-98-0133, Responds to Violations Noted in Insp Rept 50-395/98-04. Corrective Actions:Need for Adding Applicable Action Statement for Tt & Feedwater Isolation Automatic Actuation Logic as Part of Conversion to Improved TS Will Be Assessed
page: https://kanterella.com/RC-2D98-2D0133-2C_Responds_to_Violations_Noted_in_Insp_Rept_50-2D395/98-2D04._Corrective_Actions-3ANeed_for_Adding_Applicable_Action_Statement_for_Tt_-26_Feedwater_Isolation_Aut…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: RC-98-0133, Responds to Violations Noted in Insp Rept 50-395/98-04. Corrective Actions:Need for Adding Applicable Action Statement for Tt & Feedwater Isolation Automatic Actuation Logic as Part of Conversion to Improved TS Will Be Assessed

ML20206K181
type: Subject
page: https://kanterella.com/ML20206K181
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: ML20206K181

ML20151L656
type: Subject
page: https://kanterella.com/ML20151L656
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: ML20151L656

LER-1989-017, :on 890613,observed That Auxiliary Control Room Pressurizer Level Indicators Were Indicating High as Compared to Main Control Room Level Indicators.Caused by Improper Calibr.Part 21 Related
type: Subject
label: 05000327/LER-1989-017, :on 890613,observed That Auxiliary Control Room Pressurizer Level Indicators Were Indicating High as Compared to Main Control Room Level Indicators.Caused by Improper Calibr.Part 21 Related
page: https://kanterella.com/05000327/LER-2D1989-2D017-2C_-3Aon_890613-2Cobserved_That_Auxiliary_Control_Room_Pressurizer_Level_Indicators_Were_Indicating_High_as_Compared_to_Main_Control_Room_Level_Indicat…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000327/LER-1989-017, :on 890613,observed That Auxiliary Control Room Pressurizer Level Indicators Were Indicating High as Compared to Main Control Room Level Indicators.Caused by Improper Calibr.Part 21 Related

LER-1988-019-02, :on 880407,discovered That Two ECCS Pumps to Be Inoperable,Resulting in Inadvertent Entry Into Tech Spec 3.0.3.Caused by Inadequate Work Control.Plant Procedure for Work Control Revised
type: Subject
label: 05000328/LER-1988-019-02, :on 880407,discovered That Two ECCS Pumps to Be Inoperable,Resulting in Inadvertent Entry Into Tech Spec 3.0.3.Caused by Inadequate Work Control.Plant Procedure for Work Control Revised
page: https://kanterella.com/05000328/LER-2D1988-2D019-2D02-2C_-3Aon_880407-2Cdiscovered_That_Two_ECCS_Pumps_to_Be_Inoperable-2CResulting_in_Inadvertent_Entry_Into_Tech_Spec_3.0.3.Caused_by_Inadequate_Work_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000328/LER-1988-019-02, :on 880407,discovered That Two ECCS Pumps to Be Inoperable,Resulting in Inadvertent Entry Into Tech Spec 3.0.3.Caused by Inadequate Work Control.Plant Procedure for Work Control Revised

Reactor Core Power Level Was in Excess of 1518.5 Mwt.Caused by Failure to Return FT-466V Input Parameter to Off Scan.Input FT-446V Was Removed from on Scan at Approx 1452
type: Subject
label: 05000301/LER-1998-004-01, :on 980424,operations W/Reactor Core Power Level Was in Excess of 1518.5 Mwt.Caused by Failure to Return FT-466V Input Parameter to Off Scan.Input FT-446V Was Removed from on Scan at Approx 1452
page: https://kanterella.com/05000301/LER-2D1998-2D004-2D01-2C_-3Aon_980424-2Coperations_W/Reactor_Core_Power_Level_Was_in_Excess_of_1518.5_Mwt.Caused_by_Failure_to_Return_FT-2D466V_Input_Parameter_to_Off_S…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000301/LER-1998-004-01, :on 980424,operations W/Reactor Core Power Level Was in Excess of 1518.5 Mwt.Caused by Failure to Return FT-466V Input Parameter to Off Scan.Input FT-446V Was Removed from on Scan at Approx 1452

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 306A
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-1989-030, :on 890505,determined That Portion of Radiological Environ Monitoring Program Not Conducted in That Milk Samples No Longer Available from Farm.Caused by Personnel Error.New Station to Be Added
type: Subject
label: 05000352/LER-1989-030, :on 890505,determined That Portion of Radiological Environ Monitoring Program Not Conducted in That Milk Samples No Longer Available from Farm.Caused by Personnel Error.New Station to Be Added
page: https://kanterella.com/05000352/LER-2D1989-2D030-2C_-3Aon_890505-2Cdetermined_That_Portion_of_Radiological_Environ_Monitoring_Program_Not_Conducted_in_That_Milk_Samples_No_Longer_Available_from_Farm.C…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000352/LER-1989-030, :on 890505,determined That Portion of Radiological Environ Monitoring Program Not Conducted in That Milk Samples No Longer Available from Farm.Caused by Personnel Error.New Station to Be Added

LER-1988-027, :on 881117,discovered That Requirements of Tech Spec 3.3.2.1 Do Not Refer to Testing of ESF Final Actuated Devices.Caused by Interpretation of Requirements. Justification for Continued Operation Written
type: Subject
label: 05000338/LER-1988-027, :on 881117,discovered That Requirements of Tech Spec 3.3.2.1 Do Not Refer to Testing of ESF Final Actuated Devices.Caused by Interpretation of Requirements. Justification for Continued Operation Written
page: https://kanterella.com/05000338/LER-2D1988-2D027-2C_-3Aon_881117-2Cdiscovered_That_Requirements_of_Tech_Spec_3.3.2.1_Do_Not_Refer_to_Testing_of_ESF_Final_Actuated_Devices.Caused_by_Interpretation_of_R…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000338/LER-1988-027, :on 881117,discovered That Requirements of Tech Spec 3.3.2.1 Do Not Refer to Testing of ESF Final Actuated Devices.Caused by Interpretation of Requirements. Justification for Continued Operation Written

Steam Generator Eddy Current Test Results from Second Refuel Outage.Caused by Personnel Error & Inadequate Administrative Controls.Selection Process Will Be Revised
type: Subject
label: 05000382/LER-1989-009, :on 890504,discovered Discrepancy W/Steam Generator Eddy Current Test Results from Second Refuel Outage.Caused by Personnel Error & Inadequate Administrative Controls.Selection Process Will Be Revised
page: https://kanterella.com/05000382/LER-2D1989-2D009-2C_-3Aon_890504-2Cdiscovered_Discrepancy_W/Steam_Generator_Eddy_Current_Test_Results_from_Second_Refuel_Outage.Caused_by_Personnel_Error_-26_Inadequate…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1989-009, :on 890504,discovered Discrepancy W/Steam Generator Eddy Current Test Results from Second Refuel Outage.Caused by Personnel Error & Inadequate Administrative Controls.Selection Process Will Be Revised

LER-1988-030, :Since 881110,number of Discrepancies Have Been Identified in fire-rated Assemblies at Plant.Cause of Events Appears to Be Inadequate Fire Seal Installation & Insp Program During Initial Plant Const
type: Subject
label: 05000382/LER-1988-030, :Since 881110,number of Discrepancies Have Been Identified in fire-rated Assemblies at Plant.Cause of Events Appears to Be Inadequate Fire Seal Installation & Insp Program During Initial Plant Const
page: https://kanterella.com/05000382/LER-2D1988-2D030-2C_-3ASince_881110-2Cnumber_of_Discrepancies_Have_Been_Identified_in_fire-2Drated_Assemblies_at_Plant.Cause_of_Events_Appears_to_Be_Inadequate_Fire_Sea…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1988-030, :Since 881110,number of Discrepancies Have Been Identified in fire-rated Assemblies at Plant.Cause of Events Appears to Be Inadequate Fire Seal Installation & Insp Program During Initial Plant Const

LER-1989-013-01, :on 890603,required Test for Diesel Generator Cardox Room Smoke Detectors Was Not Performed.Caused by Lack of Effective Method for Communicating Surveillance Test Status to Shift Manager
type: Subject
label: 05000277/LER-1989-013-01, :on 890603,required Test for Diesel Generator Cardox Room Smoke Detectors Was Not Performed.Caused by Lack of Effective Method for Communicating Surveillance Test Status to Shift Manager
page: https://kanterella.com/05000277/LER-2D1989-2D013-2D01-2C_-3Aon_890603-2Crequired_Test_for_Diesel_Generator_Cardox_Room_Smoke_Detectors_Was_Not_Performed.Caused_by_Lack_of_Effective_Method_for_Communic…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000277/LER-1989-013-01, :on 890603,required Test for Diesel Generator Cardox Room Smoke Detectors Was Not Performed.Caused by Lack of Effective Method for Communicating Surveillance Test Status to Shift Manager

Fixed Resistor
type: Subject
label: 05000341/LER-1989-015, :on 890707,power Lost to Div I Reactor Protection Sys Bus a Due to Motor Generator Overvoltage Condition.Caused by Single Phase Sensing Potentiometer. Component Replaced W/Fixed Resistor
page: https://kanterella.com/05000341/LER-2D1989-2D015-2C_-3Aon_890707-2Cpower_Lost_to_Div_I_Reactor_Protection_Sys_Bus_a_Due_to_Motor_Generator_Overvoltage_Condition.Caused_by_Single_Phase_Sensing_Potentio…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000341/LER-1989-015, :on 890707,power Lost to Div I Reactor Protection Sys Bus a Due to Motor Generator Overvoltage Condition.Caused by Single Phase Sensing Potentiometer. Component Replaced W/Fixed Resistor

LER-1989-015-01, :on 890808,input Error in LBLOCA Analysis for 18- Steam Generator Tube Plugging Licensing Case Discovered. Caused by PCT Above Limit Specified in 10CFR50.46.Reanalysis Performed to Determine Impact
type: Subject
label: 05000338/LER-1989-015-01, :on 890808,input Error in LBLOCA Analysis for 18% Steam Generator Tube Plugging Licensing Case Discovered. Caused by PCT Above Limit Specified in 10CFR50.46.Reanalysis Performed to Determine Impact
page: https://kanterella.com/05000338/LER-2D1989-2D015-2D01-2C_-3Aon_890808-2Cinput_Error_in_LBLOCA_Analysis_for_18-_Steam_Generator_Tube_Plugging_Licensing_Case_Discovered._Caused_by_PCT_Above_Limit_Specif…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000338/LER-1989-015-01, :on 890808,input Error in LBLOCA Analysis for 18% Steam Generator Tube Plugging Licensing Case Discovered. Caused by PCT Above Limit Specified in 10CFR50.46.Reanalysis Performed to Determine Impact

LER-1989-005, :on 890222,Limiting Condition for Operation Action 3.8.1.1 Not Performed When Component Cooling Water Pump a Temporarily Removed from Svc.Caused by Misapplication of Terms Operable & Operability
type: Subject
label: 05000382/LER-1989-005, :on 890222,Limiting Condition for Operation Action 3.8.1.1 Not Performed When Component Cooling Water Pump a Temporarily Removed from Svc.Caused by Misapplication of Terms Operable & Operability
page: https://kanterella.com/05000382/LER-2D1989-2D005-2C_-3Aon_890222-2CLimiting_Condition_for_Operation_Action_3.8.1.1_Not_Performed_When_Component_Cooling_Water_Pump_a_Temporarily_Removed_from_Svc.Caused…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1989-005, :on 890222,Limiting Condition for Operation Action 3.8.1.1 Not Performed When Component Cooling Water Pump a Temporarily Removed from Svc.Caused by Misapplication of Terms Operable & Operability

LER-1989-010, :on 890221,loss of Preferred Offsite Power Occurred That Resulted in Automatic Start of Emergency Diesel Generators.Caused by Actuation of Startup Transformer Differential Ground Relay.Cable Replaced
type: Subject
label: 05000293/LER-1989-010, :on 890221,loss of Preferred Offsite Power Occurred That Resulted in Automatic Start of Emergency Diesel Generators.Caused by Actuation of Startup Transformer Differential Ground Relay.Cable Replaced
page: https://kanterella.com/05000293/LER-2D1989-2D010-2C_-3Aon_890221-2Closs_of_Preferred_Offsite_Power_Occurred_That_Resulted_in_Automatic_Start_of_Emergency_Diesel_Generators.Caused_by_Actuation_of_Start…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1989-010, :on 890221,loss of Preferred Offsite Power Occurred That Resulted in Automatic Start of Emergency Diesel Generators.Caused by Actuation of Startup Transformer Differential Ground Relay.Cable Replaced

Inadequate Support.Caused by Deficient Installation & Maint Instructions
type: Subject
label: 05000277/LER-1989-006-01, :on 890209,NRC Inspector Discovered That Tubing to Torus Air & Nitrogen Purge 18 Inch Containment Isolation Valve Installed W/Inadequate Support.Caused by Deficient Installation & Maint Instructions
page: https://kanterella.com/05000277/LER-2D1989-2D006-2D01-2C_-3Aon_890209-2CNRC_Inspector_Discovered_That_Tubing_to_Torus_Air_-26_Nitrogen_Purge_18_Inch_Containment_Isolation_Valve_Installed_W/Inadequate_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000277/LER-1989-006-01, :on 890209,NRC Inspector Discovered That Tubing to Torus Air & Nitrogen Purge 18 Inch Containment Isolation Valve Installed W/Inadequate Support.Caused by Deficient Installation & Maint Instructions

LER-1989-016-01, :on 890722,APRM hi-hi Signal Caused LPRM Detector 4B-40-33 to Spike Upscale.Caused by Output Signal of LPRM Detector Spiking High.Detector Placed in Bypass Position & Scram Signal Reset
type: Subject
label: 05000277/LER-1989-016-01, :on 890722,APRM hi-hi Signal Caused LPRM Detector 4B-40-33 to Spike Upscale.Caused by Output Signal of LPRM Detector Spiking High.Detector Placed in Bypass Position & Scram Signal Reset
page: https://kanterella.com/05000277/LER-2D1989-2D016-2D01-2C_-3Aon_890722-2CAPRM_hi-2Dhi_Signal_Caused_LPRM_Detector_4B-2D40-2D33_to_Spike_Upscale.Caused_by_Output_Signal_of_LPRM_Detector_Spiking_High.Det…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000277/LER-1989-016-01, :on 890722,APRM hi-hi Signal Caused LPRM Detector 4B-40-33 to Spike Upscale.Caused by Output Signal of LPRM Detector Spiking High.Detector Placed in Bypass Position & Scram Signal Reset

05000260/LER-1989-012, :on 890405,discovered That RHR Pump Breaker Not Racked Out as Required.Caused by Written Special Requirements Not Being Transmitted to Shift Personnel Prior to Board Transfer
type: Subject
page: https://kanterella.com/05000260/LER-2D1989-2D012-2C_-3Aon_890405-2Cdiscovered_That_RHR_Pump_Breaker_Not_Racked_Out_as_Required.Caused_by_Written_Special_Requirements_Not_Being_Transmitted_to_Shift_Per…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000260/LER-1989-012, :on 890405,discovered That RHR Pump Breaker Not Racked Out as Required.Caused by Written Special Requirements Not Being Transmitted to Shift Personnel Prior to Board Transfer

LER-1989-023, :on 890522,during Insps,Wall Thickness Below Required Design Min Observed on RHR Loop a Injection Throttle Valve.Caused by Erosion Due to Throttling.Wall Thickness Measurements Performed More Often
type: Subject
label: 05000298/LER-1989-023, :on 890522,during Insps,Wall Thickness Below Required Design Min Observed on RHR Loop a Injection Throttle Valve.Caused by Erosion Due to Throttling.Wall Thickness Measurements Performed More Often
page: https://kanterella.com/05000298/LER-2D1989-2D023-2C_-3Aon_890522-2Cduring_Insps-2CWall_Thickness_Below_Required_Design_Min_Observed_on_RHR_Loop_a_Injection_Throttle_Valve.Caused_by_Erosion_Due_to_Thro…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000298/LER-1989-023, :on 890522,during Insps,Wall Thickness Below Required Design Min Observed on RHR Loop a Injection Throttle Valve.Caused by Erosion Due to Throttling.Wall Thickness Measurements Performed More Often

LER-1989-022-01, :on 890722,power Range Excore Detector N-43 on Unit Failed During Operation & Declared Inoperable.Caused by Inadequate Procedure.Surveillance Instruction SI-178 Revised to Correct Deficiencies
type: Subject
label: 05000327/LER-1989-022-01, :on 890722,power Range Excore Detector N-43 on Unit Failed During Operation & Declared Inoperable.Caused by Inadequate Procedure.Surveillance Instruction SI-178 Revised to Correct Deficiencies
page: https://kanterella.com/05000327/LER-2D1989-2D022-2D01-2C_-3Aon_890722-2Cpower_Range_Excore_Detector_N-2D43_on_Unit_Failed_During_Operation_-26_Declared_Inoperable.Caused_by_Inadequate_Procedure.Survei…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000327/LER-1989-022-01, :on 890722,power Range Excore Detector N-43 on Unit Failed During Operation & Declared Inoperable.Caused by Inadequate Procedure.Surveillance Instruction SI-178 Revised to Correct Deficiencies

Tech Spec 4.0.5.Caused by Miscommunication. Procedures Revised
type: Subject
label: 05000382/LER-1989-010, :on 890520,determined That Low Recirculation Flow Not Included in Pump Operability Which Resulted in Noncompliance W/Tech Spec 4.0.5.Caused by Miscommunication. Procedures Revised
page: https://kanterella.com/05000382/LER-2D1989-2D010-2C_-3Aon_890520-2Cdetermined_That_Low_Recirculation_Flow_Not_Included_in_Pump_Operability_Which_Resulted_in_Noncompliance_W/Tech_Spec_4.0.5.Caused_by_M…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1989-010, :on 890520,determined That Low Recirculation Flow Not Included in Pump Operability Which Resulted in Noncompliance W/Tech Spec 4.0.5.Caused by Miscommunication. Procedures Revised

LER-1989-009, :on 890411,spurious Spikes on Independent Main Steam Line Radiation Monitors Resulted in Full Scram.Cause for Spikes Undetermined.Welding & Grinding in Area Stopped & Scram & Isolation Logic Reset
type: Subject
label: 05000260/LER-1989-009, :on 890411,spurious Spikes on Independent Main Steam Line Radiation Monitors Resulted in Full Scram.Cause for Spikes Undetermined.Welding & Grinding in Area Stopped & Scram & Isolation Logic Reset
page: https://kanterella.com/05000260/LER-2D1989-2D009-2C_-3Aon_890411-2Cspurious_Spikes_on_Independent_Main_Steam_Line_Radiation_Monitors_Resulted_in_Full_Scram.Cause_for_Spikes_Undetermined.Welding_-26_Gr…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000260/LER-1989-009, :on 890411,spurious Spikes on Independent Main Steam Line Radiation Monitors Resulted in Full Scram.Cause for Spikes Undetermined.Welding & Grinding in Area Stopped & Scram & Isolation Logic Reset

LER-1989-004, :on 890328,plant Main Feedwater Pumps (MFP) Experienced Speed Control Problems.Because of MFP Controller Problems,Integrated Control Sys Response Caused post-trip. Test Program Established to Monitor Pump
type: Subject
label: 05000312/LER-1989-004, :on 890328,plant Main Feedwater Pumps (MFP) Experienced Speed Control Problems.Because of MFP Controller Problems,Integrated Control Sys Response Caused post-trip. Test Program Established to Monitor Pump
page: https://kanterella.com/05000312/LER-2D1989-2D004-2C_-3Aon_890328-2Cplant_Main_Feedwater_Pumps_-28MFP-29_Experienced_Speed_Control_Problems.Because_of_MFP_Controller_Problems-2CIntegrated_Control_Sys_R…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000312/LER-1989-004, :on 890328,plant Main Feedwater Pumps (MFP) Experienced Speed Control Problems.Because of MFP Controller Problems,Integrated Control Sys Response Caused post-trip. Test Program Established to Monitor Pump

LER-1989-008, :on 890527,reactor Trip Occurred.Caused by Inadequate Procedure for Verifying Proper Insulation After Reassembly of Bearing Oil Piping.New Bearing & Permanent Magnet Generator Stator Installed
type: Subject
label: 05000364/LER-1989-008, :on 890527,reactor Trip Occurred.Caused by Inadequate Procedure for Verifying Proper Insulation After Reassembly of Bearing Oil Piping.New Bearing & Permanent Magnet Generator Stator Installed
page: https://kanterella.com/05000364/LER-2D1989-2D008-2C_-3Aon_890527-2Creactor_Trip_Occurred.Caused_by_Inadequate_Procedure_for_Verifying_Proper_Insulation_After_Reassembly_of_Bearing_Oil_Piping.New_Beari…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000364/LER-1989-008, :on 890527,reactor Trip Occurred.Caused by Inadequate Procedure for Verifying Proper Insulation After Reassembly of Bearing Oil Piping.New Bearing & Permanent Magnet Generator Stator Installed

LER-1989-004-01, :on 890320,HPCI Sys Unable to Fulfill Safety Function During Postulated Design Basis Events.Caused by Design Deficiency.On 890330,step Starting Resistors Removed from Power Circuits
type: Subject
label: 05000277/LER-1989-004-01, :on 890320,HPCI Sys Unable to Fulfill Safety Function During Postulated Design Basis Events.Caused by Design Deficiency.On 890330,step Starting Resistors Removed from Power Circuits
page: https://kanterella.com/05000277/LER-2D1989-2D004-2D01-2C_-3Aon_890320-2CHPCI_Sys_Unable_to_Fulfill_Safety_Function_During_Postulated_Design_Basis_Events.Caused_by_Design_Deficiency.On_890330-2Cstep_St…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000277/LER-1989-004-01, :on 890320,HPCI Sys Unable to Fulfill Safety Function During Postulated Design Basis Events.Caused by Design Deficiency.On 890330,step Starting Resistors Removed from Power Circuits

LER-1988-041, :on 881209,discovered That as-installed Instrument Cabinets Supplied by Bailey Meter Co Did Not Meet Seismic Qualification Requirements.Caused by Lack of Two Restraint Bars on Vendor Drawings
type: Subject
label: 05000328/LER-1988-041, :on 881209,discovered That as-installed Instrument Cabinets Supplied by Bailey Meter Co Did Not Meet Seismic Qualification Requirements.Caused by Lack of Two Restraint Bars on Vendor Drawings
page: https://kanterella.com/05000328/LER-2D1988-2D041-2C_-3Aon_881209-2Cdiscovered_That_as-2Dinstalled_Instrument_Cabinets_Supplied_by_Bailey_Meter_Co_Did_Not_Meet_Seismic_Qualification_Requirements.Caused…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000328/LER-1988-041, :on 881209,discovered That as-installed Instrument Cabinets Supplied by Bailey Meter Co Did Not Meet Seismic Qualification Requirements.Caused by Lack of Two Restraint Bars on Vendor Drawings

O Approved Procedure,Lack of Closed Loop Communication & Inadequate Sys Status Sensitivity by Operations Shift Team
type: Subject
label: 05000425/LER-1989-003-02, :on 890309,Tech Spec 3.0.3 Entered.Caused by Shift Supervisor Depressurizing RHR Sys W/O Approved Procedure,Lack of Closed Loop Communication & Inadequate Sys Status Sensitivity by Operations Shift Team
page: https://kanterella.com/05000425/LER-2D1989-2D003-2D02-2C_-3Aon_890309-2CTech_Spec_3.0.3_Entered.Caused_by_Shift_Supervisor_Depressurizing_RHR_Sys_W/O_Approved_Procedure-2CLack_of_Closed_Loop_Communica…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000425/LER-1989-003-02, :on 890309,Tech Spec 3.0.3 Entered.Caused by Shift Supervisor Depressurizing RHR Sys W/O Approved Procedure,Lack of Closed Loop Communication & Inadequate Sys Status Sensitivity by Operations Shift Team

LER-1987-033, :on 870729,RWCU Containment Isolation Valve Closed Due to High Effluent Temp.Caused by Personnel Error & Failure of Alarms to Annunciate.Operator Disciplined & Investigation Into Alarm Failure Will Be Made
type: Subject
label: 05000341/LER-1987-033, :on 870729,RWCU Containment Isolation Valve Closed Due to High Effluent Temp.Caused by Personnel Error & Failure of Alarms to Annunciate.Operator Disciplined & Investigation Into Alarm Failure Will Be Made
page: https://kanterella.com/05000341/LER-2D1987-2D033-2C_-3Aon_870729-2CRWCU_Containment_Isolation_Valve_Closed_Due_to_High_Effluent_Temp.Caused_by_Personnel_Error_-26_Failure_of_Alarms_to_Annunciate.Opera…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000341/LER-1987-033, :on 870729,RWCU Containment Isolation Valve Closed Due to High Effluent Temp.Caused by Personnel Error & Failure of Alarms to Annunciate.Operator Disciplined & Investigation Into Alarm Failure Will Be Made

05000482/LER-1987-054, :on 871127,ESF Actuated.Caused by Moisture Induced Corrosion of Electrical Connector on Radiation Monitor Skid.Connector Cleaned & Sealed W/Heat Shrink Moisture Seal
type: Subject
page: https://kanterella.com/05000482/LER-2D1987-2D054-2C_-3Aon_871127-2CESF_Actuated.Caused_by_Moisture_Induced_Corrosion_of_Electrical_Connector_on_Radiation_Monitor_Skid.Connector_Cleaned_-26_Sealed_W/He…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000482/LER-1987-054, :on 871127,ESF Actuated.Caused by Moisture Induced Corrosion of Electrical Connector on Radiation Monitor Skid.Connector Cleaned & Sealed W/Heat Shrink Moisture Seal

LER-1987-009, :on 870718,main Steam Safety Valves (MSSV) Failed Lift Pressure Test.Caused by Failure to Address MSSV Lift Pressure Tolerance in SEP Steam Generator Tube Rupture (SGTR) Analysis.Sgtr Analysis Revised
type: Subject
label: 05000213/LER-1987-009, :on 870718,main Steam Safety Valves (MSSV) Failed Lift Pressure Test.Caused by Failure to Address MSSV Lift Pressure Tolerance in SEP Steam Generator Tube Rupture (SGTR) Analysis.Sgtr Analysis Revised
page: https://kanterella.com/05000213/LER-2D1987-2D009-2C_-3Aon_870718-2Cmain_Steam_Safety_Valves_-28MSSV-29_Failed_Lift_Pressure_Test.Caused_by_Failure_to_Address_MSSV_Lift_Pressure_Tolerance_in_SEP_Steam_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000213/LER-1987-009, :on 870718,main Steam Safety Valves (MSSV) Failed Lift Pressure Test.Caused by Failure to Address MSSV Lift Pressure Tolerance in SEP Steam Generator Tube Rupture (SGTR) Analysis.Sgtr Analysis Revised

05000336/LER-1987-011, :on 870723,automatic Reactor Trip Occurred. Caused by Low Level in Steam Generator 1.Spray Valve 2-RC-100F Repaired & Pdic 5270 Replaced
type: Subject
page: https://kanterella.com/05000336/LER-2D1987-2D011-2C_-3Aon_870723-2Cautomatic_Reactor_Trip_Occurred._Caused_by_Low_Level_in_Steam_Generator_1.Spray_Valve_2-2DRC-2D100F_Repaired_-26_Pdic_5270_Replaced
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1987-011, :on 870723,automatic Reactor Trip Occurred. Caused by Low Level in Steam Generator 1.Spray Valve 2-RC-100F Repaired & Pdic 5270 Replaced

LER-1998-006, :on 980624,loss of Offsite Power Was Noted. Caused by Tornado Damage to Switchyard.Tested & Repaired Affected Electrical & Mechanical Equipment Necessary to Restore Two Offsite Power Sources
type: Subject
label: 05000346/LER-1998-006, :on 980624,loss of Offsite Power Was Noted. Caused by Tornado Damage to Switchyard.Tested & Repaired Affected Electrical & Mechanical Equipment Necessary to Restore Two Offsite Power Sources
page: https://kanterella.com/05000346/LER-2D1998-2D006-2C_-3Aon_980624-2Closs_of_Offsite_Power_Was_Noted._Caused_by_Tornado_Damage_to_Switchyard.Tested_-26_Repaired_Affected_Electrical_-26_Mechanical_Equipm…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000346/LER-1998-006, :on 980624,loss of Offsite Power Was Noted. Caused by Tornado Damage to Switchyard.Tested & Repaired Affected Electrical & Mechanical Equipment Necessary to Restore Two Offsite Power Sources

05000278/LER-1998-002-02, :on 980504,failure to Meet TS for Rcic,Was Revealed.Caused by Incomplete Procedural Guidance.Various Components Including Trip Tappet,Head Lever & Tappet Guide Were Replaced
type: Subject
page: https://kanterella.com/05000278/LER-2D1998-2D002-2D02-2C_-3Aon_980504-2Cfailure_to_Meet_TS_for_Rcic-2CWas_Revealed.Caused_by_Incomplete_Procedural_Guidance.Various_Components_Including_Trip_Tappet-2CH…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000278/LER-1998-002-02, :on 980504,failure to Meet TS for Rcic,Was Revealed.Caused by Incomplete Procedural Guidance.Various Components Including Trip Tappet,Head Lever & Tappet Guide Were Replaced

LER-1998-004-01, :on 980606,failure to Meet TS for off-site Source,Was Determined.Caused by Lightning Strike & No Positive Verification That Tap Changer Was operational.3SU Tap Changer Circuitry Was Repaired,Tested & Returned to Svc
type: Subject
label: 05000277/LER-1998-004-01, :on 980606,failure to Meet TS for off-site Source,Was Determined.Caused by Lightning Strike & No Positive Verification That Tap Changer Was operational.3SU Tap Changer Circuitry Was Repaired,Tested & Returned to Svc
page: https://kanterella.com/05000277/LER-2D1998-2D004-2D01-2C_-3Aon_980606-2Cfailure_to_Meet_TS_for_off-2Dsite_Source-2CWas_Determined.Caused_by_Lightning_Strike_-26_No_Positive_Verification_That_Tap_Chang…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000277/LER-1998-004-01, :on 980606,failure to Meet TS for off-site Source,Was Determined.Caused by Lightning Strike & No Positive Verification That Tap Changer Was operational.3SU Tap Changer Circuitry Was Repaired,Tested & Returned to Svc

05000382/LER-1998-013, :on 980701,IST Valve Surveillances Were Missed. Caused by Inadequate Processing of Info Transferred Between Operations Procedure Group & Programs Engineering.Procedure Revised
type: Subject
page: https://kanterella.com/05000382/LER-2D1998-2D013-2C_-3Aon_980701-2CIST_Valve_Surveillances_Were_Missed._Caused_by_Inadequate_Processing_of_Info_Transferred_Between_Operations_Procedure_Group_-26_Progr…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1998-013, :on 980701,IST Valve Surveillances Were Missed. Caused by Inadequate Processing of Info Transferred Between Operations Procedure Group & Programs Engineering.Procedure Revised

LER-1987-017, :on 871023,fire Watch Left Post Before Svc Water Pump Water Curtain Sys Returned to Svc.Caused by Personnel Error.Review of Incident for Lessons Learned & Upgrades to Station Training Program Performed
type: Subject
label: 05000213/LER-1987-017, :on 871023,fire Watch Left Post Before Svc Water Pump Water Curtain Sys Returned to Svc.Caused by Personnel Error.Review of Incident for Lessons Learned & Upgrades to Station Training Program Performed
page: https://kanterella.com/05000213/LER-2D1987-2D017-2C_-3Aon_871023-2Cfire_Watch_Left_Post_Before_Svc_Water_Pump_Water_Curtain_Sys_Returned_to_Svc.Caused_by_Personnel_Error.Review_of_Incident_for_Lessons…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000213/LER-1987-017, :on 871023,fire Watch Left Post Before Svc Water Pump Water Curtain Sys Returned to Svc.Caused by Personnel Error.Review of Incident for Lessons Learned & Upgrades to Station Training Program Performed

LER-1998-004-02, :on 980619,discovered Missed Auxiliary Hoist Surveillance Prior to Rod Drive Latching.Caused by Inadequate Work Practices.Suspended Drive Rod Latching, Completed Load Test & Resumed Drive Rod Latching
type: Subject
label: 05000369/LER-1998-004-02, :on 980619,discovered Missed Auxiliary Hoist Surveillance Prior to Rod Drive Latching.Caused by Inadequate Work Practices.Suspended Drive Rod Latching, Completed Load Test & Resumed Drive Rod Latching
page: https://kanterella.com/05000369/LER-2D1998-2D004-2D02-2C_-3Aon_980619-2Cdiscovered_Missed_Auxiliary_Hoist_Surveillance_Prior_to_Rod_Drive_Latching.Caused_by_Inadequate_Work_Practices.Suspended_Drive_R…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000369/LER-1998-004-02, :on 980619,discovered Missed Auxiliary Hoist Surveillance Prior to Rod Drive Latching.Caused by Inadequate Work Practices.Suspended Drive Rod Latching, Completed Load Test & Resumed Drive Rod Latching

05000423/LER-1998-033, :on 980610,manual ESF Actuation of Motor Driven Auxiliary FW Pumps Was Noted.Caused by Trip of Motor Driven SG FW Pump.Motor Driven FW Pump Impeller Was Replaced
type: Subject
page: https://kanterella.com/05000423/LER-2D1998-2D033-2C_-3Aon_980610-2Cmanual_ESF_Actuation_of_Motor_Driven_Auxiliary_FW_Pumps_Was_Noted.Caused_by_Trip_of_Motor_Driven_SG_FW_Pump.Motor_Driven_FW_Pump_Impe…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000423/LER-1998-033, :on 980610,manual ESF Actuation of Motor Driven Auxiliary FW Pumps Was Noted.Caused by Trip of Motor Driven SG FW Pump.Motor Driven FW Pump Impeller Was Replaced

05000259/LER-1987-028-01, :on 871008,unplanned Containment Isolations Occurred.Caused by Inadequate Procedures.Radiation Monitoring Sys & Alarm Response Procedures Revised
type: Subject
page: https://kanterella.com/05000259/LER-2D1987-2D028-2D01-2C_-3Aon_871008-2Cunplanned_Containment_Isolations_Occurred.Caused_by_Inadequate_Procedures.Radiation_Monitoring_Sys_-26_Alarm_Response_Procedures…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000259/LER-1987-028-01, :on 871008,unplanned Containment Isolations Occurred.Caused by Inadequate Procedures.Radiation Monitoring Sys & Alarm Response Procedures Revised

LER-1986-013, :on 861107,failure Declared on as-found Reactor Bldg Integrated Leak Rate Test.Caused by Leakage from Bldg Purge Exhaust Valve Interspace.Second Test Performed & Resultant as-left Bldg Leak Rate Acceptable
type: Subject
label: 05000289/LER-1986-013, :on 861107,failure Declared on as-found Reactor Bldg Integrated Leak Rate Test.Caused by Leakage from Bldg Purge Exhaust Valve Interspace.Second Test Performed & Resultant as-left Bldg Leak Rate Acceptable
page: https://kanterella.com/05000289/LER-2D1986-2D013-2C_-3Aon_861107-2Cfailure_Declared_on_as-2Dfound_Reactor_Bldg_Integrated_Leak_Rate_Test.Caused_by_Leakage_from_Bldg_Purge_Exhaust_Valve_Interspace.Seco…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000289/LER-1986-013, :on 861107,failure Declared on as-found Reactor Bldg Integrated Leak Rate Test.Caused by Leakage from Bldg Purge Exhaust Valve Interspace.Second Test Performed & Resultant as-left Bldg Leak Rate Acceptable

LER-1989-003-01, :on 890207,group 2C Primary Containment Isolation Sys Valve Isolation Occurred Resulting in motor- Operated Feedwater Flush Valves Receiving Signals to Close. Caused by Stated Inadvertent Signals
type: Subject
label: 05000277/LER-1989-003-01, :on 890207,group 2C Primary Containment Isolation Sys Valve Isolation Occurred Resulting in motor- Operated Feedwater Flush Valves Receiving Signals to Close. Caused by Stated Inadvertent Signals
page: https://kanterella.com/05000277/LER-2D1989-2D003-2D01-2C_-3Aon_890207-2Cgroup_2C_Primary_Containment_Isolation_Sys_Valve_Isolation_Occurred_Resulting_in_motor-2D_Operated_Feedwater_Flush_Valves_Receiv…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000277/LER-1989-003-01, :on 890207,group 2C Primary Containment Isolation Sys Valve Isolation Occurred Resulting in motor- Operated Feedwater Flush Valves Receiving Signals to Close. Caused by Stated Inadvertent Signals

LER-1987-008, :on 870625,control Rod 31 Dropped Into Core & Overfeed to Steam Generator 2 Occurred.Caused by Faulty Fuse & Inadequate Maint Procedure,Respectively.Fuse Replaced & Procedure Revised
type: Subject
label: 05000213/LER-1987-008, :on 870625,control Rod 31 Dropped Into Core & Overfeed to Steam Generator 2 Occurred.Caused by Faulty Fuse & Inadequate Maint Procedure,Respectively.Fuse Replaced & Procedure Revised
page: https://kanterella.com/05000213/LER-2D1987-2D008-2C_-3Aon_870625-2Ccontrol_Rod_31_Dropped_Into_Core_-26_Overfeed_to_Steam_Generator_2_Occurred.Caused_by_Faulty_Fuse_-26_Inadequate_Maint_Procedure-2CRe…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000213/LER-1987-008, :on 870625,control Rod 31 Dropped Into Core & Overfeed to Steam Generator 2 Occurred.Caused by Faulty Fuse & Inadequate Maint Procedure,Respectively.Fuse Replaced & Procedure Revised

LER-1987-011, :on 870906,reactor Tripped from Power Level of 104.5 - High Flux Reactor Sys Signal.On 870907,two Attempts to Place Decay Heat Loop 2 in Svc Resulted in Pressurizer Level Drops of 10 & 6 Inches,Respectively
type: Subject
label: 05000346/LER-1987-011, :on 870906,reactor Tripped from Power Level of 104.5 % High Flux Reactor Sys Signal.On 870907,two Attempts to Place Decay Heat Loop 2 in Svc Resulted in Pressurizer Level Drops of 10 & 6 Inches,Respectively
page: https://kanterella.com/05000346/LER-2D1987-2D011-2C_-3Aon_870906-2Creactor_Tripped_from_Power_Level_of_104.5_-_High_Flux_Reactor_Sys_Signal.On_870907-2Ctwo_Attempts_to_Place_Decay_Heat_Loop_2_in_Svc_R…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000346/LER-1987-011, :on 870906,reactor Tripped from Power Level of 104.5 % High Flux Reactor Sys Signal.On 870907,two Attempts to Place Decay Heat Loop 2 in Svc Resulted in Pressurizer Level Drops of 10 & 6 Inches,Respectively

Inadequate Travel Remaining for Thermal Growth
type: Subject
label: 05000313/LER-1988-009, :on 880922,three Inoperable Snubbers Discovered on safety-related Piping Sys.One Snubber Failed Due to Spec of Undersized Snubber & Other Two Found W/Inadequate Travel Remaining for Thermal Growth
page: https://kanterella.com/05000313/LER-2D1988-2D009-2C_-3Aon_880922-2Cthree_Inoperable_Snubbers_Discovered_on_safety-2Drelated_Piping_Sys.One_Snubber_Failed_Due_to_Spec_of_Undersized_Snubber_-26_Other_Tw…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000313/LER-1988-009, :on 880922,three Inoperable Snubbers Discovered on safety-related Piping Sys.One Snubber Failed Due to Spec of Undersized Snubber & Other Two Found W/Inadequate Travel Remaining for Thermal Growth

05000321/LER-1989-001-01, :on 890224,isolation of Group 5 Primary Containment Isolation Sys Occurred.Caused by Rapid Filling of Sys Piping When Pump Suction Valve Opened.Procedures Revised
type: Subject
page: https://kanterella.com/05000321/LER-2D1989-2D001-2D01-2C_-3Aon_890224-2Cisolation_of_Group_5_Primary_Containment_Isolation_Sys_Occurred.Caused_by_Rapid_Filling_of_Sys_Piping_When_Pump_Suction_Valve_Op…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000321/LER-1989-001-01, :on 890224,isolation of Group 5 Primary Containment Isolation Sys Occurred.Caused by Rapid Filling of Sys Piping When Pump Suction Valve Opened.Procedures Revised

05000260/LER-1988-016-01, :on 881209,unplanned Manual Start of RHR Pump Occurred.Caused by Personnel Error.Labeling of RHR Local Controls Will Be Corrected & Licensed Personnel Will Review Event
type: Subject
page: https://kanterella.com/05000260/LER-2D1988-2D016-2D01-2C_-3Aon_881209-2Cunplanned_Manual_Start_of_RHR_Pump_Occurred.Caused_by_Personnel_Error.Labeling_of_RHR_Local_Controls_Will_Be_Corrected_-26_Licen…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000260/LER-1988-016-01, :on 881209,unplanned Manual Start of RHR Pump Occurred.Caused by Personnel Error.Labeling of RHR Local Controls Will Be Corrected & Licensed Personnel Will Review Event

LER-1987-015-01, :on 870827 & 28,main Control Room Environ Control Sys Actuated on Signal from Refueling Floor Area Radiation Monitor,Resulting in 870827 Pressurization.Caused by Faulty Gm Tube.Tube Replaced
type: Subject
label: 05000321/LER-1987-015-01, :on 870827 & 28,main Control Room Environ Control Sys Actuated on Signal from Refueling Floor Area Radiation Monitor,Resulting in 870827 Pressurization.Caused by Faulty Gm Tube.Tube Replaced
page: https://kanterella.com/05000321/LER-2D1987-2D015-2D01-2C_-3Aon_870827_-26_28-2Cmain_Control_Room_Environ_Control_Sys_Actuated_on_Signal_from_Refueling_Floor_Area_Radiation_Monitor-2CResulting_in_87082…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000321/LER-1987-015-01, :on 870827 & 28,main Control Room Environ Control Sys Actuated on Signal from Refueling Floor Area Radiation Monitor,Resulting in 870827 Pressurization.Caused by Faulty Gm Tube.Tube Replaced

Nonconservative Trip Valve.Caused by Equipment Failure of Master Trip Unit (Rosemont 710 DU) E41-N657A.Instrument Repaired
type: Subject
label: 05000341/LER-1989-004, :on 890118,HPCI Inoperable Due to Isolation Logic Functioning W/Nonconservative Trip Valve.Caused by Equipment Failure of Master Trip Unit (Rosemont 710 DU) E41-N657A.Instrument Repaired
page: https://kanterella.com/05000341/LER-2D1989-2D004-2C_-3Aon_890118-2CHPCI_Inoperable_Due_to_Isolation_Logic_Functioning_W/Nonconservative_Trip_Valve.Caused_by_Equipment_Failure_of_Master_Trip_Unit_-28Ro…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000341/LER-1989-004, :on 890118,HPCI Inoperable Due to Isolation Logic Functioning W/Nonconservative Trip Valve.Caused by Equipment Failure of Master Trip Unit (Rosemont 710 DU) E41-N657A.Instrument Repaired

LER-1987-004, :on 870202 & 0208,automatic Actuations of Emergency Safeguards Actuation Sys Resulted in Containment Purge Valve Isolations.Caused by Broken Window on Beta Scintillation Detector.Detector Replaced
type: Subject
label: 05000336/LER-1987-004, :on 870202 & 0208,automatic Actuations of Emergency Safeguards Actuation Sys Resulted in Containment Purge Valve Isolations.Caused by Broken Window on Beta Scintillation Detector.Detector Replaced
page: https://kanterella.com/05000336/LER-2D1987-2D004-2C_-3Aon_870202_-26_0208-2Cautomatic_Actuations_of_Emergency_Safeguards_Actuation_Sys_Resulted_in_Containment_Purge_Valve_Isolations.Caused_by_Broken_W…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1987-004, :on 870202 & 0208,automatic Actuations of Emergency Safeguards Actuation Sys Resulted in Containment Purge Valve Isolations.Caused by Broken Window on Beta Scintillation Detector.Detector Replaced

LER-1987-033, :on 870529,11 Hourly Fire Watches Required by Tech Specs Missed.Caused by Unexpected Demand on Available Manpower Due to Breakdown in Security Computer Sys.Fire Watch Pool Will Be Established
type: Subject
label: 05000312/LER-1987-033, :on 870529,11 Hourly Fire Watches Required by Tech Specs Missed.Caused by Unexpected Demand on Available Manpower Due to Breakdown in Security Computer Sys.Fire Watch Pool Will Be Established
page: https://kanterella.com/05000312/LER-2D1987-2D033-2C_-3Aon_870529-2C11_Hourly_Fire_Watches_Required_by_Tech_Specs_Missed.Caused_by_Unexpected_Demand_on_Available_Manpower_Due_to_Breakdown_in_Security_C…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000312/LER-1987-033, :on 870529,11 Hourly Fire Watches Required by Tech Specs Missed.Caused by Unexpected Demand on Available Manpower Due to Breakdown in Security Computer Sys.Fire Watch Pool Will Be Established

LER-1987-030, :on 870529,due to Concurrent Work on Radiation Monitors R15049 & R15050,number of Operable Channels to Trip Reactor Bldg Purge Sys Reduced to Zero.Caused by Cognitive Personnel Error.Personnel Trained
type: Subject
label: 05000312/LER-1987-030, :on 870529,due to Concurrent Work on Radiation Monitors R15049 & R15050,number of Operable Channels to Trip Reactor Bldg Purge Sys Reduced to Zero.Caused by Cognitive Personnel Error.Personnel Trained
page: https://kanterella.com/05000312/LER-2D1987-2D030-2C_-3Aon_870529-2Cdue_to_Concurrent_Work_on_Radiation_Monitors_R15049_-26_R15050-2Cnumber_of_Operable_Channels_to_Trip_Reactor_Bldg_Purge_Sys_Reduced_t…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000312/LER-1987-030, :on 870529,due to Concurrent Work on Radiation Monitors R15049 & R15050,number of Operable Channels to Trip Reactor Bldg Purge Sys Reduced to Zero.Caused by Cognitive Personnel Error.Personnel Trained

Design Occurred.Caused by Use of 275 Psig Solenoid Valve Which Does Not Meet Minimum DC Voltage Available.Solenoid Valves Modified
type: Subject
label: 05000266/LER-1998-008, :on 980203,EDG Air Start Motor Solenoid Valves W/Spring Not in Accordance W/Design Occurred.Caused by Use of 275 Psig Solenoid Valve Which Does Not Meet Minimum DC Voltage Available.Solenoid Valves Modified
page: https://kanterella.com/05000266/LER-2D1998-2D008-2C_-3Aon_980203-2CEDG_Air_Start_Motor_Solenoid_Valves_W/Spring_Not_in_Accordance_W/Design_Occurred.Caused_by_Use_of_275_Psig_Solenoid_Valve_Which_Does_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000266/LER-1998-008, :on 980203,EDG Air Start Motor Solenoid Valves W/Spring Not in Accordance W/Design Occurred.Caused by Use of 275 Psig Solenoid Valve Which Does Not Meet Minimum DC Voltage Available.Solenoid Valves Modified

05000382/LER-1998-004, :on 980304,TS 4.0.3 Condition - CPC Channel Functional Test,Was Concluded from Preliminary CEOG Rept. Caused by Human Error.Cpc Channels A,B & C Were Satisfactorily Tested
type: Subject
page: https://kanterella.com/05000382/LER-2D1998-2D004-2C_-3Aon_980304-2CTS_4.0.3_Condition_-2D_CPC_Channel_Functional_Test-2CWas_Concluded_from_Preliminary_CEOG_Rept._Caused_by_Human_Error.Cpc_Channels_A-2…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1998-004, :on 980304,TS 4.0.3 Condition - CPC Channel Functional Test,Was Concluded from Preliminary CEOG Rept. Caused by Human Error.Cpc Channels A,B & C Were Satisfactorily Tested

LER-1998-003, :on 980302,inoperable Hydrogen Analyzers Were Noted Due to Undersized Thermal Overloads.Engineering Personnel Conducted all-hands Meetings to Discuss Management Expectations for Verifying Critical Design Inputs
type: Subject
label: 05000382/LER-1998-003, :on 980302,inoperable Hydrogen Analyzers Were Noted Due to Undersized Thermal Overloads.Engineering Personnel Conducted all-hands Meetings to Discuss Management Expectations for Verifying Critical Design Inputs
page: https://kanterella.com/05000382/LER-2D1998-2D003-2C_-3Aon_980302-2Cinoperable_Hydrogen_Analyzers_Were_Noted_Due_to_Undersized_Thermal_Overloads.Engineering_Personnel_Conducted_all-2Dhands_Meetings_to_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1998-003, :on 980302,inoperable Hydrogen Analyzers Were Noted Due to Undersized Thermal Overloads.Engineering Personnel Conducted all-hands Meetings to Discuss Management Expectations for Verifying Critical Design Inputs

LER-1997-022, :on 970910,unplanned Manual Scram Occurred Due to Relay Malfunction in a Phase Main Generator step-up Transformer.Sampled & Tested Oil in Main Steam Generators & Replaced Cooling Fan Control Circuit Relays
type: Subject
label: 05000354/LER-1997-022, :on 970910,unplanned Manual Scram Occurred Due to Relay Malfunction in a Phase Main Generator step-up Transformer.Sampled & Tested Oil in Main Steam Generators & Replaced Cooling Fan Control Circuit Relays
page: https://kanterella.com/05000354/LER-2D1997-2D022-2C_-3Aon_970910-2Cunplanned_Manual_Scram_Occurred_Due_to_Relay_Malfunction_in_a_Phase_Main_Generator_step-2Dup_Transformer.Sampled_-26_Tested_Oil_in_Ma…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000354/LER-1997-022, :on 970910,unplanned Manual Scram Occurred Due to Relay Malfunction in a Phase Main Generator step-up Transformer.Sampled & Tested Oil in Main Steam Generators & Replaced Cooling Fan Control Circuit Relays

LER-1998-011, :on 980214,missed TS Surveillance of Radiation Monitor Prior to Discharge Occurred.Caused by Failure to Adhere to Procedures Based on Failure to Recognize.Thorough Root Cause Evaluation Performed
type: Subject
label: 05000266/LER-1998-011, :on 980214,missed TS Surveillance of Radiation Monitor Prior to Discharge Occurred.Caused by Failure to Adhere to Procedures Based on Failure to Recognize.Thorough Root Cause Evaluation Performed
page: https://kanterella.com/05000266/LER-2D1998-2D011-2C_-3Aon_980214-2Cmissed_TS_Surveillance_of_Radiation_Monitor_Prior_to_Discharge_Occurred.Caused_by_Failure_to_Adhere_to_Procedures_Based_on_Failure_to…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000266/LER-1998-011, :on 980214,missed TS Surveillance of Radiation Monitor Prior to Discharge Occurred.Caused by Failure to Adhere to Procedures Based on Failure to Recognize.Thorough Root Cause Evaluation Performed

LER-1993-012, :on 930510,reported Unusual Noise Due to Small Frictional Force Release in RCS During heat-up.Implemented Thermal Expansion Monitoring Program in Refuel Viii to Aid in Identification of Locations of Restraint on RCS
type: Subject
label: 05000482/LER-1993-012, :on 930510,reported Unusual Noise Due to Small Frictional Force Release in RCS During heat-up.Implemented Thermal Expansion Monitoring Program in Refuel Viii to Aid in Identification of Locations of Restraint on RCS
page: https://kanterella.com/05000482/LER-2D1993-2D012-2C_-3Aon_930510-2Creported_Unusual_Noise_Due_to_Small_Frictional_Force_Release_in_RCS_During_heat-2Dup.Implemented_Thermal_Expansion_Monitoring_Program…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000482/LER-1993-012, :on 930510,reported Unusual Noise Due to Small Frictional Force Release in RCS During heat-up.Implemented Thermal Expansion Monitoring Program in Refuel Viii to Aid in Identification of Locations of Restraint on RCS

05000255/LER-1998-005, :on 980217,actuation of Containment Isolation Occurred.Caused by Inadvertent Containment High Radiation Signal.Plant Status Evaluated & Equipment Lineups Restored
type: Subject
page: https://kanterella.com/05000255/LER-2D1998-2D005-2C_-3Aon_980217-2Cactuation_of_Containment_Isolation_Occurred.Caused_by_Inadvertent_Containment_High_Radiation_Signal.Plant_Status_Evaluated_-26_Equipm…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000255/LER-1998-005, :on 980217,actuation of Containment Isolation Occurred.Caused by Inadvertent Containment High Radiation Signal.Plant Status Evaluated & Equipment Lineups Restored

LER-1998-003-01, :on 980218,omission in Retest Manual Leads to Failure to Perform Required Retest Prior to Restoring Ci Valves to Svc.Retest Manual Will Be Updated to Reflect Specific TS Requirements for Ci Valves
type: Subject
label: 05000413/LER-1998-003-01, :on 980218,omission in Retest Manual Leads to Failure to Perform Required Retest Prior to Restoring Ci Valves to Svc.Retest Manual Will Be Updated to Reflect Specific TS Requirements for Ci Valves
page: https://kanterella.com/05000413/LER-2D1998-2D003-2D01-2C_-3Aon_980218-2Comission_in_Retest_Manual_Leads_to_Failure_to_Perform_Required_Retest_Prior_to_Restoring_Ci_Valves_to_Svc.Retest_Manual_Will_Be_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000413/LER-1998-003-01, :on 980218,omission in Retest Manual Leads to Failure to Perform Required Retest Prior to Restoring Ci Valves to Svc.Retest Manual Will Be Updated to Reflect Specific TS Requirements for Ci Valves

LER-1998-004-01, :on 980216,missed TS Surveillance on CR Area Ventilation Sys Actuation Instrumentation Noted.Caused by Incorrect Mode Specification Requirements in Affected Ts. Submitted License Amend & Verified TS Are Met
type: Subject
label: 05000413/LER-1998-004-01, :on 980216,missed TS Surveillance on CR Area Ventilation Sys Actuation Instrumentation Noted.Caused by Incorrect Mode Specification Requirements in Affected Ts. Submitted License Amend & Verified TS Are Met
page: https://kanterella.com/05000413/LER-2D1998-2D004-2D01-2C_-3Aon_980216-2Cmissed_TS_Surveillance_on_CR_Area_Ventilation_Sys_Actuation_Instrumentation_Noted.Caused_by_Incorrect_Mode_Specification_Require…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000413/LER-1998-004-01, :on 980216,missed TS Surveillance on CR Area Ventilation Sys Actuation Instrumentation Noted.Caused by Incorrect Mode Specification Requirements in Affected Ts. Submitted License Amend & Verified TS Are Met

LER-1999-008, :on 990809,electric Motor Driven & Diesel Driven Fire Pump Concurrent Inoperability Occurred.Caused by Human Performance Error.Diesel Fire Pump Jacket Water Temp Switch Replaced.With
type: Subject
label: 05000325/LER-1999-008, :on 990809,electric Motor Driven & Diesel Driven Fire Pump Concurrent Inoperability Occurred.Caused by Human Performance Error.Diesel Fire Pump Jacket Water Temp Switch Replaced.With
page: https://kanterella.com/05000325/LER-2D1999-2D008-2C_-3Aon_990809-2Celectric_Motor_Driven_-26_Diesel_Driven_Fire_Pump_Concurrent_Inoperability_Occurred.Caused_by_Human_Performance_Error.Diesel_Fire_Pum…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000325/LER-1999-008, :on 990809,electric Motor Driven & Diesel Driven Fire Pump Concurrent Inoperability Occurred.Caused by Human Performance Error.Diesel Fire Pump Jacket Water Temp Switch Replaced.With

Rod K-2 Will Be Replaced & Rod Will Be Tested During Startup Testing
type: Subject
label: 05000364/LER-1998-001-05, :on 980328,manual Reactor Trip Due to Dropped Control Rod K-2,was Determined.Caused by Overcurrent Condition.Crdm Cable & Connectors Associated W/Rod K-2 Will Be Replaced & Rod Will Be Tested During Startup Testing
page: https://kanterella.com/05000364/LER-2D1998-2D001-2D05-2C_-3Aon_980328-2Cmanual_Reactor_Trip_Due_to_Dropped_Control_Rod_K-2D2-2Cwas_Determined.Caused_by_Overcurrent_Condition.Crdm_Cable_-26_Connectors_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000364/LER-1998-001-05, :on 980328,manual Reactor Trip Due to Dropped Control Rod K-2,was Determined.Caused by Overcurrent Condition.Crdm Cable & Connectors Associated W/Rod K-2 Will Be Replaced & Rod Will Be Tested During Startup Testing

05000354/LER-1998-001-03, :on 980213,missed HPCI Resulted in Unavailability of Hpci.Caused by Personnel Error.Reactivated Recurring Tasks & Successfully Performed Surveillance Testing
type: Subject
page: https://kanterella.com/05000354/LER-2D1998-2D001-2D03-2C_-3Aon_980213-2Cmissed_HPCI_Resulted_in_Unavailability_of_Hpci.Caused_by_Personnel_Error.Reactivated_Recurring_Tasks_-26_Successfully_Performed_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000354/LER-1998-001-03, :on 980213,missed HPCI Resulted in Unavailability of Hpci.Caused by Personnel Error.Reactivated Recurring Tasks & Successfully Performed Surveillance Testing

LER-1999-004-02, :on 981109,EDG Was Inoperable Longer than Allowed by TS Due to Governor Compensation Valve.Root Cause Evaluation Being Performed to Determine How Compensation Valve Became Closed
type: Subject
label: 05000281/LER-1999-004-02, :on 981109,EDG Was Inoperable Longer than Allowed by TS Due to Governor Compensation Valve.Root Cause Evaluation Being Performed to Determine How Compensation Valve Became Closed
page: https://kanterella.com/05000281/LER-2D1999-2D004-2D02-2C_-3Aon_981109-2CEDG_Was_Inoperable_Longer_than_Allowed_by_TS_Due_to_Governor_Compensation_Valve.Root_Cause_Evaluation_Being_Performed_to_Determi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000281/LER-1999-004-02, :on 981109,EDG Was Inoperable Longer than Allowed by TS Due to Governor Compensation Valve.Root Cause Evaluation Being Performed to Determine How Compensation Valve Became Closed

LER-1999-006-01, :on 990904,potential for Safegurads Exhaust Flow to Bypass Charcoal Filter,Was Discovered.Caused by Degraded Damper.Plant Issue Rept Submitted for B Train of Savs Flow Rate.With
type: Subject
label: 05000338/LER-1999-006-01, :on 990904,potential for Safegurads Exhaust Flow to Bypass Charcoal Filter,Was Discovered.Caused by Degraded Damper.Plant Issue Rept Submitted for B Train of Savs Flow Rate.With
page: https://kanterella.com/05000338/LER-2D1999-2D006-2D01-2C_-3Aon_990904-2Cpotential_for_Safegurads_Exhaust_Flow_to_Bypass_Charcoal_Filter-2CWas_Discovered.Caused_by_Degraded_Damper.Plant_Issue_Rept_Subm…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000338/LER-1999-006-01, :on 990904,potential for Safegurads Exhaust Flow to Bypass Charcoal Filter,Was Discovered.Caused by Degraded Damper.Plant Issue Rept Submitted for B Train of Savs Flow Rate.With

LER-1998-007, :on 980317,discovered That No Allowance for Instrument Loop Uncertainity Included in Surveillance for Chilled Water Outlet Temp.Caused by Failure to Consider Instrument Loop Uncertainty.Revised Task
type: Subject
label: 05000382/LER-1998-007, :on 980317,discovered That No Allowance for Instrument Loop Uncertainity Included in Surveillance for Chilled Water Outlet Temp.Caused by Failure to Consider Instrument Loop Uncertainty.Revised Task
page: https://kanterella.com/05000382/LER-2D1998-2D007-2C_-3Aon_980317-2Cdiscovered_That_No_Allowance_for_Instrument_Loop_Uncertainity_Included_in_Surveillance_for_Chilled_Water_Outlet_Temp.Caused_by_Failur…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1998-007, :on 980317,discovered That No Allowance for Instrument Loop Uncertainity Included in Surveillance for Chilled Water Outlet Temp.Caused by Failure to Consider Instrument Loop Uncertainty.Revised Task

LER-1998-006, :on 980306,increased Differential Pressure for Feedwater Isolation Valves Occurred.Caused by Failure to Consider All Pressure Source Affecting Mfivs.Admin Controls Have Been Enacted Requiring Entry Into TS 3.6.3
type: Subject
label: 05000382/LER-1998-006, :on 980306,increased Differential Pressure for Feedwater Isolation Valves Occurred.Caused by Failure to Consider All Pressure Source Affecting Mfivs.Admin Controls Have Been Enacted Requiring Entry Into TS 3.6.3
page: https://kanterella.com/05000382/LER-2D1998-2D006-2C_-3Aon_980306-2Cincreased_Differential_Pressure_for_Feedwater_Isolation_Valves_Occurred.Caused_by_Failure_to_Consider_All_Pressure_Source_Affecting_M…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1998-006, :on 980306,increased Differential Pressure for Feedwater Isolation Valves Occurred.Caused by Failure to Consider All Pressure Source Affecting Mfivs.Admin Controls Have Been Enacted Requiring Entry Into TS 3.6.3

05000245/LER-1997-033-01, :on 970801,unmonitored Airborne Radioactivity Release Paths Were Discovered.Caused by Lack of Adequate Monitoring Program.Placed Low Vol Air Samplers at Areas in Question
type: Subject
page: https://kanterella.com/05000245/LER-2D1997-2D033-2D01-2C_-3Aon_970801-2Cunmonitored_Airborne_Radioactivity_Release_Paths_Were_Discovered.Caused_by_Lack_of_Adequate_Monitoring_Program.Placed_Low_Vol_Ai…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000245/LER-1997-033-01, :on 970801,unmonitored Airborne Radioactivity Release Paths Were Discovered.Caused by Lack of Adequate Monitoring Program.Placed Low Vol Air Samplers at Areas in Question

LER-1998-003, :on 980211,loss of Power to Integrated Control Sys Occurred.Caused by Zener Diode Not Adequately Soldered to Printed Circuit Board Trace for Power Supply Monitor. FPC Replaced ICS Power Supply Monitor
type: Subject
label: 05000302/LER-1998-003, :on 980211,loss of Power to Integrated Control Sys Occurred.Caused by Zener Diode Not Adequately Soldered to Printed Circuit Board Trace for Power Supply Monitor. FPC Replaced ICS Power Supply Monitor
page: https://kanterella.com/05000302/LER-2D1998-2D003-2C_-3Aon_980211-2Closs_of_Power_to_Integrated_Control_Sys_Occurred.Caused_by_Zener_Diode_Not_Adequately_Soldered_to_Printed_Circuit_Board_Trace_for_Pow…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000302/LER-1998-003, :on 980211,loss of Power to Integrated Control Sys Occurred.Caused by Zener Diode Not Adequately Soldered to Printed Circuit Board Trace for Power Supply Monitor. FPC Replaced ICS Power Supply Monitor

LER-1997-004-01, :on 970911,discovered That Four Containment Isolation Valves Were Not Tested IAW Ts.Caused by Inadequate Mgt Change.Will Revise Licensing Requirements Manual Table 5.1-1 & UFSAR Table 6.2-60
type: Subject
label: 05000412/LER-1997-004-01, :on 970911,discovered That Four Containment Isolation Valves Were Not Tested IAW Ts.Caused by Inadequate Mgt Change.Will Revise Licensing Requirements Manual Table 5.1-1 & UFSAR Table 6.2-60
page: https://kanterella.com/05000412/LER-2D1997-2D004-2D01-2C_-3Aon_970911-2Cdiscovered_That_Four_Containment_Isolation_Valves_Were_Not_Tested_IAW_Ts.Caused_by_Inadequate_Mgt_Change.Will_Revise_Licensing_R…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000412/LER-1997-004-01, :on 970911,discovered That Four Containment Isolation Valves Were Not Tested IAW Ts.Caused by Inadequate Mgt Change.Will Revise Licensing Requirements Manual Table 5.1-1 & UFSAR Table 6.2-60

LER-1987-016, :on 870526,unplanned Automatic Startup of Both Diesel Generators Occurred Due to Momentary Undervoltage Condition.Possibly Caused by Lightning Strike on 69kV Emergency Transformer.Generators Restored
type: Subject
label: 05000298/LER-1987-016, :on 870526,unplanned Automatic Startup of Both Diesel Generators Occurred Due to Momentary Undervoltage Condition.Possibly Caused by Lightning Strike on 69kV Emergency Transformer.Generators Restored
page: https://kanterella.com/05000298/LER-2D1987-2D016-2C_-3Aon_870526-2Cunplanned_Automatic_Startup_of_Both_Diesel_Generators_Occurred_Due_to_Momentary_Undervoltage_Condition.Possibly_Caused_by_Lightning_S…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000298/LER-1987-016, :on 870526,unplanned Automatic Startup of Both Diesel Generators Occurred Due to Momentary Undervoltage Condition.Possibly Caused by Lightning Strike on 69kV Emergency Transformer.Generators Restored

LER-1987-018, :on 870520,during Troubleshooting of Leakage Discovered in Drywell,Rwcu Inboard Isolation Valve Isolated Twice & Outboard Isolation Valve Once.Caused by Latent Heat Migration in Sys Piping.Valve Repacked
type: Subject
label: 05000341/LER-1987-018, :on 870520,during Troubleshooting of Leakage Discovered in Drywell,Rwcu Inboard Isolation Valve Isolated Twice & Outboard Isolation Valve Once.Caused by Latent Heat Migration in Sys Piping.Valve Repacked
page: https://kanterella.com/05000341/LER-2D1987-2D018-2C_-3Aon_870520-2Cduring_Troubleshooting_of_Leakage_Discovered_in_Drywell-2CRwcu_Inboard_Isolation_Valve_Isolated_Twice_-26_Outboard_Isolation_Valve_On…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000341/LER-1987-018, :on 870520,during Troubleshooting of Leakage Discovered in Drywell,Rwcu Inboard Isolation Valve Isolated Twice & Outboard Isolation Valve Once.Caused by Latent Heat Migration in Sys Piping.Valve Repacked

LER-1986-016, :on 860521,main Feedwater Isolation Occurred. Caused by Insufficient Info Provided by Mfg to Allow Adequate Initial Calibr of Feedwater Control Sys.Sys Tuned & Startup & Shutdown Procedures Revised
type: Subject
label: 05000414/LER-1986-016, :on 860521,main Feedwater Isolation Occurred. Caused by Insufficient Info Provided by Mfg to Allow Adequate Initial Calibr of Feedwater Control Sys.Sys Tuned & Startup & Shutdown Procedures Revised
page: https://kanterella.com/05000414/LER-2D1986-2D016-2C_-3Aon_860521-2Cmain_Feedwater_Isolation_Occurred._Caused_by_Insufficient_Info_Provided_by_Mfg_to_Allow_Adequate_Initial_Calibr_of_Feedwater_Control_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000414/LER-1986-016, :on 860521,main Feedwater Isolation Occurred. Caused by Insufficient Info Provided by Mfg to Allow Adequate Initial Calibr of Feedwater Control Sys.Sys Tuned & Startup & Shutdown Procedures Revised

LER-1986-004-03, :on 861107,safety Injection Signal Occurred During Mod Work to safety-related Inverters.Caused by Operator Failure to Recognize That de-energizing Process Cabinets Would Set Off Signal.Safety Injection Reset
type: Subject
label: 05000400/LER-1986-004-03, :on 861107,safety Injection Signal Occurred During Mod Work to safety-related Inverters.Caused by Operator Failure to Recognize That de-energizing Process Cabinets Would Set Off Signal.Safety Injection Reset
page: https://kanterella.com/05000400/LER-2D1986-2D004-2D03-2C_-3Aon_861107-2Csafety_Injection_Signal_Occurred_During_Mod_Work_to_safety-2Drelated_Inverters.Caused_by_Operator_Failure_to_Recognize_That_de-2…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000400/LER-1986-004-03, :on 861107,safety Injection Signal Occurred During Mod Work to safety-related Inverters.Caused by Operator Failure to Recognize That de-energizing Process Cabinets Would Set Off Signal.Safety Injection Reset

LER-1986-010-01, :on 860804,reactor Tripped During Testing of Solid State Protection Sys.Caused by Faulty Secondary Disconnecting Contacts on Train B Reactor Trip Bypass Breakers.Contacts Replaced as Needed
type: Subject
label: 05000364/LER-1986-010-01, :on 860804,reactor Tripped During Testing of Solid State Protection Sys.Caused by Faulty Secondary Disconnecting Contacts on Train B Reactor Trip Bypass Breakers.Contacts Replaced as Needed
page: https://kanterella.com/05000364/LER-2D1986-2D010-2D01-2C_-3Aon_860804-2Creactor_Tripped_During_Testing_of_Solid_State_Protection_Sys.Caused_by_Faulty_Secondary_Disconnecting_Contacts_on_Train_B_Reacto…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000364/LER-1986-010-01, :on 860804,reactor Tripped During Testing of Solid State Protection Sys.Caused by Faulty Secondary Disconnecting Contacts on Train B Reactor Trip Bypass Breakers.Contacts Replaced as Needed

05000409/LER-1986-024, :on 860719,water Splashed Off Pipe Onto Solenoid Causing Ventilation Header Solenoids to Deenergize. Caused by Blown Fuse 30-2.Fuse Replaced
type: Subject
page: https://kanterella.com/05000409/LER-2D1986-2D024-2C_-3Aon_860719-2Cwater_Splashed_Off_Pipe_Onto_Solenoid_Causing_Ventilation_Header_Solenoids_to_Deenergize._Caused_by_Blown_Fuse_30-2D2.Fuse_Replaced
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000409/LER-1986-024, :on 860719,water Splashed Off Pipe Onto Solenoid Causing Ventilation Header Solenoids to Deenergize. Caused by Blown Fuse 30-2.Fuse Replaced

G Limit Set by Tech Spec 3.4.8.a Following Reactor Trip.Caused by Minor Fuel Cladding Defects in Reactor Core
type: Subject
label: 05000338/LER-1987-005-01, :on 870419,primary Coolant I-131 Dose Equivalent Specific Activity Exceeded 1.0 Mci/G Limit Set by Tech Spec 3.4.8.a Following Reactor Trip.Caused by Minor Fuel Cladding Defects in Reactor Core
page: https://kanterella.com/05000338/LER-2D1987-2D005-2D01-2C_-3Aon_870419-2Cprimary_Coolant_I-2D131_Dose_Equivalent_Specific_Activity_Exceeded_1.0_Mci/G_Limit_Set_by_Tech_Spec_3.4.8.a_Following_Reactor_Tr…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000338/LER-1987-005-01, :on 870419,primary Coolant I-131 Dose Equivalent Specific Activity Exceeded 1.0 Mci/G Limit Set by Tech Spec 3.4.8.a Following Reactor Trip.Caused by Minor Fuel Cladding Defects in Reactor Core

LER-1986-025, :on 861022,reactor Trip Occurred.Caused by Trying to Maintain Steam Generator Levels at Low Reactor Power for Prolonged Period,Following Reactor Trip on 861021. Valve Positioner Replaced
type: Subject
label: 05000382/LER-1986-025, :on 861022,reactor Trip Occurred.Caused by Trying to Maintain Steam Generator Levels at Low Reactor Power for Prolonged Period,Following Reactor Trip on 861021. Valve Positioner Replaced
page: https://kanterella.com/05000382/LER-2D1986-2D025-2C_-3Aon_861022-2Creactor_Trip_Occurred.Caused_by_Trying_to_Maintain_Steam_Generator_Levels_at_Low_Reactor_Power_for_Prolonged_Period-2CFollowing_React…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1986-025, :on 861022,reactor Trip Occurred.Caused by Trying to Maintain Steam Generator Levels at Low Reactor Power for Prolonged Period,Following Reactor Trip on 861021. Valve Positioner Replaced

05000382/LER-1986-022, :on 861020,control Room Isolation Occurred. Caused by Degraded Electrical Connection in Barton Model 765 Flow Transmitter.Transmitter Replaced
type: Subject
page: https://kanterella.com/05000382/LER-2D1986-2D022-2C_-3Aon_861020-2Ccontrol_Room_Isolation_Occurred._Caused_by_Degraded_Electrical_Connection_in_Barton_Model_765_Flow_Transmitter.Transmitter_Replaced
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1986-022, :on 861020,control Room Isolation Occurred. Caused by Degraded Electrical Connection in Barton Model 765 Flow Transmitter.Transmitter Replaced

LER-1986-059, :on 861231,eight Fire Dampers in Diesel Generator Bldg Identified as Not Being Verified Functional by Visual Insp Every 18 Months.Caused by Personnel Error. Surveillance Instruction SI-233.3 Changed
type: Subject
label: 05000327/LER-1986-059, :on 861231,eight Fire Dampers in Diesel Generator Bldg Identified as Not Being Verified Functional by Visual Insp Every 18 Months.Caused by Personnel Error. Surveillance Instruction SI-233.3 Changed
page: https://kanterella.com/05000327/LER-2D1986-2D059-2C_-3Aon_861231-2Ceight_Fire_Dampers_in_Diesel_Generator_Bldg_Identified_as_Not_Being_Verified_Functional_by_Visual_Insp_Every_18_Months.Caused_by_Pers…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000327/LER-1986-059, :on 861231,eight Fire Dampers in Diesel Generator Bldg Identified as Not Being Verified Functional by Visual Insp Every 18 Months.Caused by Personnel Error. Surveillance Instruction SI-233.3 Changed

05000336/LER-1999-011, :on 990823,thermal Reactor Power Limit Was Exceeded.Caused by Lack of Conservatism in Procedures & Alarm Setpoints Used to Limit Reactor Power.Revised Operating Procedures
type: Subject
page: https://kanterella.com/05000336/LER-2D1999-2D011-2C_-3Aon_990823-2Cthermal_Reactor_Power_Limit_Was_Exceeded.Caused_by_Lack_of_Conservatism_in_Procedures_-26_Alarm_Setpoints_Used_to_Limit_Reactor_Power…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1999-011, :on 990823,thermal Reactor Power Limit Was Exceeded.Caused by Lack of Conservatism in Procedures & Alarm Setpoints Used to Limit Reactor Power.Revised Operating Procedures

LER-1999-003-01, :on 990616,inadvertent Actuation of Turbine Driven Auxiliary Feedwater Pump Occurred.Caused by Inadequate Policy or Directive.Station Directives Will Be Reviewed & Appropriately Revised
type: Subject
label: 05000370/LER-1999-003-01, :on 990616,inadvertent Actuation of Turbine Driven Auxiliary Feedwater Pump Occurred.Caused by Inadequate Policy or Directive.Station Directives Will Be Reviewed & Appropriately Revised
page: https://kanterella.com/05000370/LER-2D1999-2D003-2D01-2C_-3Aon_990616-2Cinadvertent_Actuation_of_Turbine_Driven_Auxiliary_Feedwater_Pump_Occurred.Caused_by_Inadequate_Policy_or_Directive.Station_Direc…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000370/LER-1999-003-01, :on 990616,inadvertent Actuation of Turbine Driven Auxiliary Feedwater Pump Occurred.Caused by Inadequate Policy or Directive.Station Directives Will Be Reviewed & Appropriately Revised

05000317/LER-1998-011, :on 980428,prematurely Released Fire Watch Was Noted.Caused by Inadequate Cure Time Communications.Revised Configuration Control Documents.With
type: Subject
page: https://kanterella.com/05000317/LER-2D1998-2D011-2C_-3Aon_980428-2Cprematurely_Released_Fire_Watch_Was_Noted.Caused_by_Inadequate_Cure_Time_Communications.Revised_Configuration_Control_Documents.With
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000317/LER-1998-011, :on 980428,prematurely Released Fire Watch Was Noted.Caused by Inadequate Cure Time Communications.Revised Configuration Control Documents.With

LER-1999-008-02, :on 990805,automatic Scram Occurred While at 100- Power Due to Automatic Turbine Trip.Caused by Malfunction of Moisture Separator Drain Tank a Drain Valve Controller.Level Controllers Replaced.With
type: Subject
label: 05000293/LER-1999-008-02, :on 990805,automatic Scram Occurred While at 100% Power Due to Automatic Turbine Trip.Caused by Malfunction of Moisture Separator Drain Tank a Drain Valve Controller.Level Controllers Replaced.With
page: https://kanterella.com/05000293/LER-2D1999-2D008-2D02-2C_-3Aon_990805-2Cautomatic_Scram_Occurred_While_at_100-_Power_Due_to_Automatic_Turbine_Trip.Caused_by_Malfunction_of_Moisture_Separator_Drain_Tan…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1999-008-02, :on 990805,automatic Scram Occurred While at 100% Power Due to Automatic Turbine Trip.Caused by Malfunction of Moisture Separator Drain Tank a Drain Valve Controller.Level Controllers Replaced.With

LER-1986-034, :on 861112,containment Ventilation Valves Closed Automatically When Indication on Containment Bldg Immediate Particulate Monitor Spiked High.Caused by Manipulation of Range Switch.Contacts Cleaned
type: Subject
label: 05000409/LER-1986-034, :on 861112,containment Ventilation Valves Closed Automatically When Indication on Containment Bldg Immediate Particulate Monitor Spiked High.Caused by Manipulation of Range Switch.Contacts Cleaned
page: https://kanterella.com/05000409/LER-2D1986-2D034-2C_-3Aon_861112-2Ccontainment_Ventilation_Valves_Closed_Automatically_When_Indication_on_Containment_Bldg_Immediate_Particulate_Monitor_Spiked_High.Cau…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000409/LER-1986-034, :on 861112,containment Ventilation Valves Closed Automatically When Indication on Containment Bldg Immediate Particulate Monitor Spiked High.Caused by Manipulation of Range Switch.Contacts Cleaned

Programs Were Revised & Testing Was Performed
type: Subject
label: 05000413/LER-1999-014, :on 990816,missed Surveillances & Operation Prohibited by TS Was Noted.Caused by Defective Procedures or Programs Inappropriate TS Requirements.Affected Procedures/ Programs Were Revised & Testing Was Performed
page: https://kanterella.com/05000413/LER-2D1999-2D014-2C_-3Aon_990816-2Cmissed_Surveillances_-26_Operation_Prohibited_by_TS_Was_Noted.Caused_by_Defective_Procedures_or_Programs_Inappropriate_TS_Requirement…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000413/LER-1999-014, :on 990816,missed Surveillances & Operation Prohibited by TS Was Noted.Caused by Defective Procedures or Programs Inappropriate TS Requirements.Affected Procedures/ Programs Were Revised & Testing Was Performed

LER-1987-002, :on 870111,unit Shutdown Commenced When Unidentified Reactor Coolant Leakage Greater than 1 Gpm Determined.Caused by Leak in Loop C RTD Manifold Tubing. Leak Repaired & Unit Returned to Power
type: Subject
label: 05000413/LER-1987-002, :on 870111,unit Shutdown Commenced When Unidentified Reactor Coolant Leakage Greater than 1 Gpm Determined.Caused by Leak in Loop C RTD Manifold Tubing. Leak Repaired & Unit Returned to Power
page: https://kanterella.com/05000413/LER-2D1987-2D002-2C_-3Aon_870111-2Cunit_Shutdown_Commenced_When_Unidentified_Reactor_Coolant_Leakage_Greater_than_1_Gpm_Determined.Caused_by_Leak_in_Loop_C_RTD_Manifold…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000413/LER-1987-002, :on 870111,unit Shutdown Commenced When Unidentified Reactor Coolant Leakage Greater than 1 Gpm Determined.Caused by Leak in Loop C RTD Manifold Tubing. Leak Repaired & Unit Returned to Power

LER-1987-003, :on 870114 & 0205,Train B Emergency Diesel Generator Did Not Start within Required 10 During Surveillance Testing.Caused by Inadequate Purge of Air from Fuel Injectors & Low Oil Temp.Maint Performed
type: Subject
label: 05000423/LER-1987-003, :on 870114 & 0205,Train B Emergency Diesel Generator Did Not Start within Required 10 During Surveillance Testing.Caused by Inadequate Purge of Air from Fuel Injectors & Low Oil Temp.Maint Performed
page: https://kanterella.com/05000423/LER-2D1987-2D003-2C_-3Aon_870114_-26_0205-2CTrain_B_Emergency_Diesel_Generator_Did_Not_Start_within_Required_10_During_Surveillance_Testing.Caused_by_Inadequate_Purge_o…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000423/LER-1987-003, :on 870114 & 0205,Train B Emergency Diesel Generator Did Not Start within Required 10 During Surveillance Testing.Caused by Inadequate Purge of Air from Fuel Injectors & Low Oil Temp.Maint Performed

LER-1997-007, :on 970818,NIS High Flux Trip Setpoint Errors Occurred.Caused by Inherent Inaccuracies Associated with Calorimetric Heat Balance at Low Power Levels.High Power Trip Setpoints Were Reduced
type: Subject
label: 05000338/LER-1997-007, :on 970818,NIS High Flux Trip Setpoint Errors Occurred.Caused by Inherent Inaccuracies Associated with Calorimetric Heat Balance at Low Power Levels.High Power Trip Setpoints Were Reduced
page: https://kanterella.com/05000338/LER-2D1997-2D007-2C_-3Aon_970818-2CNIS_High_Flux_Trip_Setpoint_Errors_Occurred.Caused_by_Inherent_Inaccuracies_Associated_with_Calorimetric_Heat_Balance_at_Low_Power_Le…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000338/LER-1997-007, :on 970818,NIS High Flux Trip Setpoint Errors Occurred.Caused by Inherent Inaccuracies Associated with Calorimetric Heat Balance at Low Power Levels.High Power Trip Setpoints Were Reduced

05000382/LER-1997-024, :on 970528,emergency Diesel Generator Autostart Occurred Due to start-up Transformer Failure.Implemented Procedures OP-901-311,OP-901-511 & OP-901-513
type: Subject
page: https://kanterella.com/05000382/LER-2D1997-2D024-2C_-3Aon_970528-2Cemergency_Diesel_Generator_Autostart_Occurred_Due_to_start-2Dup_Transformer_Failure.Implemented_Procedures_OP-2D901-2D311-2COP-2D901-…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1997-024, :on 970528,emergency Diesel Generator Autostart Occurred Due to start-up Transformer Failure.Implemented Procedures OP-901-311,OP-901-511 & OP-901-513

LER-1986-008-03, :on 860827,Train B Exhaust Ventilation Fan HVE-9B Became Inoperable When Thermal Overload Relay Spuriously Actuated & Redundant Train a Fan HVE-9A Found Inoperable Due to Oil Tank Level.Causes Not Identified
type: Subject
label: 05000335/LER-1986-008-03, :on 860827,Train B Exhaust Ventilation Fan HVE-9B Became Inoperable When Thermal Overload Relay Spuriously Actuated & Redundant Train a Fan HVE-9A Found Inoperable Due to Oil Tank Level.Causes Not Identified
page: https://kanterella.com/05000335/LER-2D1986-2D008-2D03-2C_-3Aon_860827-2CTrain_B_Exhaust_Ventilation_Fan_HVE-2D9B_Became_Inoperable_When_Thermal_Overload_Relay_Spuriously_Actuated_-26_Redundant_Train_a…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000335/LER-1986-008-03, :on 860827,Train B Exhaust Ventilation Fan HVE-9B Became Inoperable When Thermal Overload Relay Spuriously Actuated & Redundant Train a Fan HVE-9A Found Inoperable Due to Oil Tank Level.Causes Not Identified

LER-1999-002-03, :on 990630,high-energy Line Break Instrument Channels Were Inadequately Calibrated.Caused by Inadequate Surveillance Testing Procedures.Procedure Revs to Add Relay Testing in Progress.With
type: Subject
label: 05000424/LER-1999-002-03, :on 990630,high-energy Line Break Instrument Channels Were Inadequately Calibrated.Caused by Inadequate Surveillance Testing Procedures.Procedure Revs to Add Relay Testing in Progress.With
page: https://kanterella.com/05000424/LER-2D1999-2D002-2D03-2C_-3Aon_990630-2Chigh-2Denergy_Line_Break_Instrument_Channels_Were_Inadequately_Calibrated.Caused_by_Inadequate_Surveillance_Testing_Procedures.P…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000424/LER-1999-002-03, :on 990630,high-energy Line Break Instrument Channels Were Inadequately Calibrated.Caused by Inadequate Surveillance Testing Procedures.Procedure Revs to Add Relay Testing in Progress.With

LER-1985-029, :on 851228,during Performance of RCS Leak Rate Test,Leak of 1.28 Gpm Noted.Caused by Reactor Vessel Seal Ring Leaks Chemical & Vol Control Sys Pipe Crack.Seal Rings & Pipe Replaced
type: Subject
label: 05000338/LER-1985-029, :on 851228,during Performance of RCS Leak Rate Test,Leak of 1.28 Gpm Noted.Caused by Reactor Vessel Seal Ring Leaks Chemical & Vol Control Sys Pipe Crack.Seal Rings & Pipe Replaced
page: https://kanterella.com/05000338/LER-2D1985-2D029-2C_-3Aon_851228-2Cduring_Performance_of_RCS_Leak_Rate_Test-2CLeak_of_1.28_Gpm_Noted.Caused_by_Reactor_Vessel_Seal_Ring_Leaks_Chemical_-26_Vol_Control_S…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000338/LER-1985-029, :on 851228,during Performance of RCS Leak Rate Test,Leak of 1.28 Gpm Noted.Caused by Reactor Vessel Seal Ring Leaks Chemical & Vol Control Sys Pipe Crack.Seal Rings & Pipe Replaced

Trip Setpoint Set Factor of 10 Too High Since Plant Startup.Caused by Personnel Error.Rms,Its Database & Data Base Change Methodology Under Review
type: Subject
label: 05000382/LER-1987-001-01, :on 870330,gaseous Waste Mgt Effluent Radiation Monitor Alarm/Trip Setpoint Set Factor of 10 Too High Since Plant Startup.Caused by Personnel Error.Rms,Its Database & Data Base Change Methodology Under Review
page: https://kanterella.com/05000382/LER-2D1987-2D001-2D01-2C_-3Aon_870330-2Cgaseous_Waste_Mgt_Effluent_Radiation_Monitor_Alarm/Trip_Setpoint_Set_Factor_of_10_Too_High_Since_Plant_Startup.Caused_by_Personn…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1987-001-01, :on 870330,gaseous Waste Mgt Effluent Radiation Monitor Alarm/Trip Setpoint Set Factor of 10 Too High Since Plant Startup.Caused by Personnel Error.Rms,Its Database & Data Base Change Methodology Under Review

LER-1987-004, :on 870210,discovered That Instrument Control Surveillance Test Not Performed on 870116,per Tech Specs. Caused by Failure to Complete Rev to Test Procedure Prior to Scheduled Test.Procedures Revised
type: Subject
label: 05000220/LER-1987-004, :on 870210,discovered That Instrument Control Surveillance Test Not Performed on 870116,per Tech Specs. Caused by Failure to Complete Rev to Test Procedure Prior to Scheduled Test.Procedures Revised
page: https://kanterella.com/05000220/LER-2D1987-2D004-2C_-3Aon_870210-2Cdiscovered_That_Instrument_Control_Surveillance_Test_Not_Performed_on_870116-2Cper_Tech_Specs._Caused_by_Failure_to_Complete_Rev_to_T…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000220/LER-1987-004, :on 870210,discovered That Instrument Control Surveillance Test Not Performed on 870116,per Tech Specs. Caused by Failure to Complete Rev to Test Procedure Prior to Scheduled Test.Procedures Revised

LER-1999-001, :on 990119,failure to Implement Operating License Amend 106 Requirements within 30 Day Implementation Period Was Discovered.Caused by Programmatic Deficiency. Corrective Actions Implemented in Dec 1998.With
type: Subject
label: 05000483/LER-1999-001, :on 990119,failure to Implement Operating License Amend 106 Requirements within 30 Day Implementation Period Was Discovered.Caused by Programmatic Deficiency. Corrective Actions Implemented in Dec 1998.With
page: https://kanterella.com/05000483/LER-2D1999-2D001-2C_-3Aon_990119-2Cfailure_to_Implement_Operating_License_Amend_106_Requirements_within_30_Day_Implementation_Period_Was_Discovered.Caused_by_Programmat…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000483/LER-1999-001, :on 990119,failure to Implement Operating License Amend 106 Requirements within 30 Day Implementation Period Was Discovered.Caused by Programmatic Deficiency. Corrective Actions Implemented in Dec 1998.With

LER-1986-026-01, :on 860621,feedwater Isolation Occurred Due to Spurious hi-hi Steam Generator Level Signal.Caused by Design Problem Re Transfer from Main Steam Bypass Isolation Valve to Msiv.Procedures Will Be Revised
type: Subject
label: 05000414/LER-1986-026-01, :on 860621,feedwater Isolation Occurred Due to Spurious hi-hi Steam Generator Level Signal.Caused by Design Problem Re Transfer from Main Steam Bypass Isolation Valve to Msiv.Procedures Will Be Revised
page: https://kanterella.com/05000414/LER-2D1986-2D026-2D01-2C_-3Aon_860621-2Cfeedwater_Isolation_Occurred_Due_to_Spurious_hi-2Dhi_Steam_Generator_Level_Signal.Caused_by_Design_Problem_Re_Transfer_from_Main…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000414/LER-1986-026-01, :on 860621,feedwater Isolation Occurred Due to Spurious hi-hi Steam Generator Level Signal.Caused by Design Problem Re Transfer from Main Steam Bypass Isolation Valve to Msiv.Procedures Will Be Revised

LER-1986-010-04, :on 861203,containment Phase B Isolation Occurred During Performance of Surveillance Procedure.Caused by Deficient Procedure.Procedures Re ESF Actuations During Testing Will Be Revised
type: Subject
label: 05000328/LER-1986-010-04, :on 861203,containment Phase B Isolation Occurred During Performance of Surveillance Procedure.Caused by Deficient Procedure.Procedures Re ESF Actuations During Testing Will Be Revised
page: https://kanterella.com/05000328/LER-2D1986-2D010-2D04-2C_-3Aon_861203-2Ccontainment_Phase_B_Isolation_Occurred_During_Performance_of_Surveillance_Procedure.Caused_by_Deficient_Procedure.Procedures_Re_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000328/LER-1986-010-04, :on 861203,containment Phase B Isolation Occurred During Performance of Surveillance Procedure.Caused by Deficient Procedure.Procedures Re ESF Actuations During Testing Will Be Revised

LER-1999-002, :on 990121,4 Input Parameters Were Identified Which Underestimated DBA Dose.Caused by non-conservative Concurrent Iodine Spike Radiological Dose Calculation Methodology.Acs Have Been Implemented.With
type: Subject
label: 05000334/LER-1999-002, :on 990121,4 Input Parameters Were Identified Which Underestimated DBA Dose.Caused by non-conservative Concurrent Iodine Spike Radiological Dose Calculation Methodology.Acs Have Been Implemented.With
page: https://kanterella.com/05000334/LER-2D1999-2D002-2C_-3Aon_990121-2C4_Input_Parameters_Were_Identified_Which_Underestimated_DBA_Dose.Caused_by_non-2Dconservative_Concurrent_Iodine_Spike_Radiological_Do…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000334/LER-1999-002, :on 990121,4 Input Parameters Were Identified Which Underestimated DBA Dose.Caused by non-conservative Concurrent Iodine Spike Radiological Dose Calculation Methodology.Acs Have Been Implemented.With

LER-1986-026, :on 860618,containment Isolation Valves Closed. Caused by Technician Inadvertently Grounding Power Lead During pre-operational Test.Technician Counseled.Testing Instructions to Include Caution Note
type: Subject
label: 05000440/LER-1986-026, :on 860618,containment Isolation Valves Closed. Caused by Technician Inadvertently Grounding Power Lead During pre-operational Test.Technician Counseled.Testing Instructions to Include Caution Note
page: https://kanterella.com/05000440/LER-2D1986-2D026-2C_-3Aon_860618-2Ccontainment_Isolation_Valves_Closed._Caused_by_Technician_Inadvertently_Grounding_Power_Lead_During_pre-2Doperational_Test.Technician…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000440/LER-1986-026, :on 860618,containment Isolation Valves Closed. Caused by Technician Inadvertently Grounding Power Lead During pre-operational Test.Technician Counseled.Testing Instructions to Include Caution Note

LER-1999-004, :on 990126,plant Was Operating Outside Design Basis.Caused Because Design for CR Operator Dose Calculation Did Not Consider Single Failure of CR Ventilation Sys. Revised CR Operator Dose Calculation.With
type: Subject
label: 05000461/LER-1999-004, :on 990126,plant Was Operating Outside Design Basis.Caused Because Design for CR Operator Dose Calculation Did Not Consider Single Failure of CR Ventilation Sys. Revised CR Operator Dose Calculation.With
page: https://kanterella.com/05000461/LER-2D1999-2D004-2C_-3Aon_990126-2Cplant_Was_Operating_Outside_Design_Basis.Caused_Because_Design_for_CR_Operator_Dose_Calculation_Did_Not_Consider_Single_Failure_of_CR…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000461/LER-1999-004, :on 990126,plant Was Operating Outside Design Basis.Caused Because Design for CR Operator Dose Calculation Did Not Consider Single Failure of CR Ventilation Sys. Revised CR Operator Dose Calculation.With

LER-1986-007-02, :on 860617,reactor Trip Occurred Due to High Level in Steam Generator A.Caused by Failure of Valve FCV-2478 to Close Due to Metal Debris Between Plug & Valve Seat.Metal Debris Removed & Valve Reassembled
type: Subject
label: 05000281/LER-1986-007-02, :on 860617,reactor Trip Occurred Due to High Level in Steam Generator A.Caused by Failure of Valve FCV-2478 to Close Due to Metal Debris Between Plug & Valve Seat.Metal Debris Removed & Valve Reassembled
page: https://kanterella.com/05000281/LER-2D1986-2D007-2D02-2C_-3Aon_860617-2Creactor_Trip_Occurred_Due_to_High_Level_in_Steam_Generator_A.Caused_by_Failure_of_Valve_FCV-2D2478_to_Close_Due_to_Metal_Debris_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000281/LER-1986-007-02, :on 860617,reactor Trip Occurred Due to High Level in Steam Generator A.Caused by Failure of Valve FCV-2478 to Close Due to Metal Debris Between Plug & Valve Seat.Metal Debris Removed & Valve Reassembled

LER-1999-006, :on 990419,values Used for Containment & Drywell Free Vols Found to Be Smaller than Originally Analyzed Due to Inadequate Calculation Control During Initial Plant Const.With 9905517 Ltr
type: Subject
label: 05000461/LER-1999-006, :on 990419,values Used for Containment & Drywell Free Vols Found to Be Smaller than Originally Analyzed Due to Inadequate Calculation Control During Initial Plant Const.With 9905517 Ltr
page: https://kanterella.com/05000461/LER-2D1999-2D006-2C_-3Aon_990419-2Cvalues_Used_for_Containment_-26_Drywell_Free_Vols_Found_to_Be_Smaller_than_Originally_Analyzed_Due_to_Inadequate_Calculation_Control_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000461/LER-1999-006, :on 990419,values Used for Containment & Drywell Free Vols Found to Be Smaller than Originally Analyzed Due to Inadequate Calculation Control During Initial Plant Const.With 9905517 Ltr

LER-1998-007-03, :on 981211,mispositioned Thumbwheel on Process CS Circuit Card Caused Inoperability of Overtemperature & Overpower Delta Temp Functions.Caused by Inadequate Program Design.Revised Procedures
type: Subject
label: 05000414/LER-1998-007-03, :on 981211,mispositioned Thumbwheel on Process CS Circuit Card Caused Inoperability of Overtemperature & Overpower Delta Temp Functions.Caused by Inadequate Program Design.Revised Procedures
page: https://kanterella.com/05000414/LER-2D1998-2D007-2D03-2C_-3Aon_981211-2Cmispositioned_Thumbwheel_on_Process_CS_Circuit_Card_Caused_Inoperability_of_Overtemperature_-26_Overpower_Delta_Temp_Functions.C…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000414/LER-1998-007-03, :on 981211,mispositioned Thumbwheel on Process CS Circuit Card Caused Inoperability of Overtemperature & Overpower Delta Temp Functions.Caused by Inadequate Program Design.Revised Procedures

LER-1999-002-01, :on 990329,event Sequence That Results in Available ECCS Being Reduced to Less than That Assumed in Current Safety Analysis.Caused by Failure of Edg.Plant Operating Procedures Revised.With
type: Subject
label: 05000263/LER-1999-002-01, :on 990329,event Sequence That Results in Available ECCS Being Reduced to Less than That Assumed in Current Safety Analysis.Caused by Failure of Edg.Plant Operating Procedures Revised.With
page: https://kanterella.com/05000263/LER-2D1999-2D002-2D01-2C_-3Aon_990329-2Cevent_Sequence_That_Results_in_Available_ECCS_Being_Reduced_to_Less_than_That_Assumed_in_Current_Safety_Analysis.Caused_by_Failu…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000263/LER-1999-002-01, :on 990329,event Sequence That Results in Available ECCS Being Reduced to Less than That Assumed in Current Safety Analysis.Caused by Failure of Edg.Plant Operating Procedures Revised.With

LER-1985-002-01, :on 850112,while Operating at 100- Power,Unit Experienced Automatic Reactor Trip from lo-lo Steam Generator Level on Loop.Caused by Failure of Discharge Valve LCV-6-106A on Heater Drain Tank Pump 3
type: Subject
label: 05000328/LER-1985-002-01, :on 850112,while Operating at 100% Power,Unit Experienced Automatic Reactor Trip from lo-lo Steam Generator Level on Loop.Caused by Failure of Discharge Valve LCV-6-106A on Heater Drain Tank Pump 3
page: https://kanterella.com/05000328/LER-2D1985-2D002-2D01-2C_-3Aon_850112-2Cwhile_Operating_at_100-_Power-2CUnit_Experienced_Automatic_Reactor_Trip_from_lo-2Dlo_Steam_Generator_Level_on_Loop.Caused_by_Fai…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000328/LER-1985-002-01, :on 850112,while Operating at 100% Power,Unit Experienced Automatic Reactor Trip from lo-lo Steam Generator Level on Loop.Caused by Failure of Discharge Valve LCV-6-106A on Heater Drain Tank Pump 3

LER-1999-002-02, :on 990329,reactor Tripped.Caused by Failed Electrical Connections on Vibration Detector for Number 9 Main Turbine Bearing.Vibration Detectors for Main Turbine Number 9 Bearing Replaced.With
type: Subject
label: 05000324/LER-1999-002-02, :on 990329,reactor Tripped.Caused by Failed Electrical Connections on Vibration Detector for Number 9 Main Turbine Bearing.Vibration Detectors for Main Turbine Number 9 Bearing Replaced.With
page: https://kanterella.com/05000324/LER-2D1999-2D002-2D02-2C_-3Aon_990329-2Creactor_Tripped.Caused_by_Failed_Electrical_Connections_on_Vibration_Detector_for_Number_9_Main_Turbine_Bearing.Vibration_Detect…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000324/LER-1999-002-02, :on 990329,reactor Tripped.Caused by Failed Electrical Connections on Vibration Detector for Number 9 Main Turbine Bearing.Vibration Detectors for Main Turbine Number 9 Bearing Replaced.With

LER-1999-002-01, :on 990323,discovered That Red Channel of SG Pressure Indication Passes Through Fire Zone.Caused by 1983 Modification Oversight.Twice Per Shift Fire Round Has Been Established for Fire Zone Pending Cable Routing Correction
type: Subject
label: 05000301/LER-1999-002-01, :on 990323,discovered That Red Channel of SG Pressure Indication Passes Through Fire Zone.Caused by 1983 Modification Oversight.Twice Per Shift Fire Round Has Been Established for Fire Zone Pending Cable Routing Correction
page: https://kanterella.com/05000301/LER-2D1999-2D002-2D01-2C_-3Aon_990323-2Cdiscovered_That_Red_Channel_of_SG_Pressure_Indication_Passes_Through_Fire_Zone.Caused_by_1983_Modification_Oversight.Twice_Per_S…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000301/LER-1999-002-01, :on 990323,discovered That Red Channel of SG Pressure Indication Passes Through Fire Zone.Caused by 1983 Modification Oversight.Twice Per Shift Fire Round Has Been Established for Fire Zone Pending Cable Routing Correction

LER-1986-017-01, :on 860521,during Downpowering of Planned Shutdown,Reactor Pressure Dropped Briefly Then Increased Rapidly to 1,047 Psig,Causing Manual Reactor Scram.Rate Stop Adjustment Screws Replaced
type: Subject
label: 05000245/LER-1986-017-01, :on 860521,during Downpowering of Planned Shutdown,Reactor Pressure Dropped Briefly Then Increased Rapidly to 1,047 Psig,Causing Manual Reactor Scram.Rate Stop Adjustment Screws Replaced
page: https://kanterella.com/05000245/LER-2D1986-2D017-2D01-2C_-3Aon_860521-2Cduring_Downpowering_of_Planned_Shutdown-2CReactor_Pressure_Dropped_Briefly_Then_Increased_Rapidly_to_1-2C047_Psig-2CCausing_Manu…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000245/LER-1986-017-01, :on 860521,during Downpowering of Planned Shutdown,Reactor Pressure Dropped Briefly Then Increased Rapidly to 1,047 Psig,Causing Manual Reactor Scram.Rate Stop Adjustment Screws Replaced

Hhsi Pumps.Caused by Inadequate Consideration of Required Operator Actions.Procedure Revised.With
type: Subject
label: 05000334/LER-1999-004-01, :on 990317,inadequate pre-fire Plan Procedure Guidance Resulted in Potential Damage to Charging/Hhsi Pumps.Caused by Inadequate Consideration of Required Operator Actions.Procedure Revised.With
page: https://kanterella.com/05000334/LER-2D1999-2D004-2D01-2C_-3Aon_990317-2Cinadequate_pre-2Dfire_Plan_Procedure_Guidance_Resulted_in_Potential_Damage_to_Charging/Hhsi_Pumps.Caused_by_Inadequate_Considera…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000334/LER-1999-004-01, :on 990317,inadequate pre-fire Plan Procedure Guidance Resulted in Potential Damage to Charging/Hhsi Pumps.Caused by Inadequate Consideration of Required Operator Actions.Procedure Revised.With

LER-1999-003-02, :on 990311,determined That Four Containment Vacuum Relief valves,CVR-101,CVR-201,CVR-102 & CVR-202,were Not Tested.Caused by Contractor Supply of Misinformation. Details of Event Discussed with Contractor.With
type: Subject
label: 05000382/LER-1999-003-02, :on 990311,determined That Four Containment Vacuum Relief valves,CVR-101,CVR-201,CVR-102 & CVR-202,were Not Tested.Caused by Contractor Supply of Misinformation. Details of Event Discussed with Contractor.With
page: https://kanterella.com/05000382/LER-2D1999-2D003-2D02-2C_-3Aon_990311-2Cdetermined_That_Four_Containment_Vacuum_Relief_valves-2CCVR-2D101-2CCVR-2D201-2CCVR-2D102_-26_CVR-2D202-2Cwere_Not_Tested.Caused…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1999-003-02, :on 990311,determined That Four Containment Vacuum Relief valves,CVR-101,CVR-201,CVR-102 & CVR-202,were Not Tested.Caused by Contractor Supply of Misinformation. Details of Event Discussed with Contractor.With

LER-1999-001-04, :on 990306,TS SR for Ice Condenser Lower Inlet Doors Was Not Met.Caused by Failure to Recognize That Recorded Valve Was Outside Acceptance Criteria.Mgt Reinforced Expectations for Procedure Performance & Review
type: Subject
label: 05000369/LER-1999-001-04, :on 990306,TS SR for Ice Condenser Lower Inlet Doors Was Not Met.Caused by Failure to Recognize That Recorded Valve Was Outside Acceptance Criteria.Mgt Reinforced Expectations for Procedure Performance & Review
page: https://kanterella.com/05000369/LER-2D1999-2D001-2D04-2C_-3Aon_990306-2CTS_SR_for_Ice_Condenser_Lower_Inlet_Doors_Was_Not_Met.Caused_by_Failure_to_Recognize_That_Recorded_Valve_Was_Outside_Acceptance_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000369/LER-1999-001-04, :on 990306,TS SR for Ice Condenser Lower Inlet Doors Was Not Met.Caused by Failure to Recognize That Recorded Valve Was Outside Acceptance Criteria.Mgt Reinforced Expectations for Procedure Performance & Review

LER-1999-002-03, :on 990225,discovered RCS Pressure Boundary Leakage on Two Inconel 600 Instrument Nozzles.Caused by Axial Cracks Near HAZ of Nozzle Partial Penetration Welds Resulting from Pwscc.Leaking Nozzles Have Been Repaired
type: Subject
label: 05000382/LER-1999-002-03, :on 990225,discovered RCS Pressure Boundary Leakage on Two Inconel 600 Instrument Nozzles.Caused by Axial Cracks Near HAZ of Nozzle Partial Penetration Welds Resulting from Pwscc.Leaking Nozzles Have Been Repaired
page: https://kanterella.com/05000382/LER-2D1999-2D002-2D03-2C_-3Aon_990225-2Cdiscovered_RCS_Pressure_Boundary_Leakage_on_Two_Inconel_600_Instrument_Nozzles.Caused_by_Axial_Cracks_Near_HAZ_of_Nozzle_Partial…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1999-002-03, :on 990225,discovered RCS Pressure Boundary Leakage on Two Inconel 600 Instrument Nozzles.Caused by Axial Cracks Near HAZ of Nozzle Partial Penetration Welds Resulting from Pwscc.Leaking Nozzles Have Been Repaired

LER-1999-001-01, :on 990215,inoperable Refueling Water Storage Tank Level Channels Resulted in Operation Outside Design Basis.Caused by Inadequate Program Design.Reviewed Procedure & Communication Improvements Between Groups
type: Subject
label: 05000413/LER-1999-001-01, :on 990215,inoperable Refueling Water Storage Tank Level Channels Resulted in Operation Outside Design Basis.Caused by Inadequate Program Design.Reviewed Procedure & Communication Improvements Between Groups
page: https://kanterella.com/05000413/LER-2D1999-2D001-2D01-2C_-3Aon_990215-2Cinoperable_Refueling_Water_Storage_Tank_Level_Channels_Resulted_in_Operation_Outside_Design_Basis.Caused_by_Inadequate_Program_D…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000413/LER-1999-001-01, :on 990215,inoperable Refueling Water Storage Tank Level Channels Resulted in Operation Outside Design Basis.Caused by Inadequate Program Design.Reviewed Procedure & Communication Improvements Between Groups

LER-1986-028-01, :on 860627,safety Injection Actuated on Low Pressurizer & Main Steam Line Pressure.Pressure Decreased Due to Inadvertent Opening of Porvs.Caused by Procedure Deficiency.Procedure Revised
type: Subject
label: 05000414/LER-1986-028-01, :on 860627,safety Injection Actuated on Low Pressurizer & Main Steam Line Pressure.Pressure Decreased Due to Inadvertent Opening of Porvs.Caused by Procedure Deficiency.Procedure Revised
page: https://kanterella.com/05000414/LER-2D1986-2D028-2D01-2C_-3Aon_860627-2Csafety_Injection_Actuated_on_Low_Pressurizer_-26_Main_Steam_Line_Pressure.Pressure_Decreased_Due_to_Inadvertent_Opening_of_Porvs…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000414/LER-1986-028-01, :on 860627,safety Injection Actuated on Low Pressurizer & Main Steam Line Pressure.Pressure Decreased Due to Inadvertent Opening of Porvs.Caused by Procedure Deficiency.Procedure Revised

05000483/LER-1986-026, :on 860707,Tech Spec Surveillance of Large Stationary 125-volt Batteries Not Performed.Caused by Personnel Error.Personnel Reminded of Weekly Surveillance Responsibilities
type: Subject
page: https://kanterella.com/05000483/LER-2D1986-2D026-2C_-3Aon_860707-2CTech_Spec_Surveillance_of_Large_Stationary_125-2Dvolt_Batteries_Not_Performed.Caused_by_Personnel_Error.Personnel_Reminded_of_Weekly_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000483/LER-1986-026, :on 860707,Tech Spec Surveillance of Large Stationary 125-volt Batteries Not Performed.Caused by Personnel Error.Personnel Reminded of Weekly Surveillance Responsibilities

LER-1986-040-01, :on 860701,Limiting Condition for Operation 3.0.3 Entered When Both Containment Spray Pumps Rendered Inoperable Due to Lack of Required Surveillance Tests.Caused by Personnel Error.Test sign-off Modified
type: Subject
label: 05000529/LER-1986-040-01, :on 860701,Limiting Condition for Operation 3.0.3 Entered When Both Containment Spray Pumps Rendered Inoperable Due to Lack of Required Surveillance Tests.Caused by Personnel Error.Test sign-off Modified
page: https://kanterella.com/05000529/LER-2D1986-2D040-2D01-2C_-3Aon_860701-2CLimiting_Condition_for_Operation_3.0.3_Entered_When_Both_Containment_Spray_Pumps_Rendered_Inoperable_Due_to_Lack_of_Required_Sur…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000529/LER-1986-040-01, :on 860701,Limiting Condition for Operation 3.0.3 Entered When Both Containment Spray Pumps Rendered Inoperable Due to Lack of Required Surveillance Tests.Caused by Personnel Error.Test sign-off Modified

LER-1998-001-02, :on 980109,MRP Determined That There Have Been Periods During Power Operation When Backup Pressure Regulator Was Oos.Caused by Inadequate Understanding of Safety Analysis.Evaluation Will Be Performed
type: Subject
label: 05000245/LER-1998-001-02, :on 980109,MRP Determined That There Have Been Periods During Power Operation When Backup Pressure Regulator Was Oos.Caused by Inadequate Understanding of Safety Analysis.Evaluation Will Be Performed
page: https://kanterella.com/05000245/LER-2D1998-2D001-2D02-2C_-3Aon_980109-2CMRP_Determined_That_There_Have_Been_Periods_During_Power_Operation_When_Backup_Pressure_Regulator_Was_Oos.Caused_by_Inadequate_U…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000245/LER-1998-001-02, :on 980109,MRP Determined That There Have Been Periods During Power Operation When Backup Pressure Regulator Was Oos.Caused by Inadequate Understanding of Safety Analysis.Evaluation Will Be Performed

LER-1998-002, :on 980112,potential Challenge to Channel Separation Was Noted.Caused by Inadequate of Temporary Mod. Specific Controls for Future Temporary Configuration Alterations Have Been Incorporated Into Plant Procedures
type: Subject
label: 05000255/LER-1998-002, :on 980112,potential Challenge to Channel Separation Was Noted.Caused by Inadequate of Temporary Mod. Specific Controls for Future Temporary Configuration Alterations Have Been Incorporated Into Plant Procedures
page: https://kanterella.com/05000255/LER-2D1998-2D002-2C_-3Aon_980112-2Cpotential_Challenge_to_Channel_Separation_Was_Noted.Caused_by_Inadequate_of_Temporary_Mod._Specific_Controls_for_Future_Temporary_Con…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000255/LER-1998-002, :on 980112,potential Challenge to Channel Separation Was Noted.Caused by Inadequate of Temporary Mod. Specific Controls for Future Temporary Configuration Alterations Have Been Incorporated Into Plant Procedures

LER-1986-004, :on 860307,reactor Protection Sys Logic Actuation Occurred.Caused by Spurious Electrical Noise in Source Range Cables.Personnel Directed to Use Local Grounds for Welding Activities
type: Subject
label: 05000483/LER-1986-004, :on 860307,reactor Protection Sys Logic Actuation Occurred.Caused by Spurious Electrical Noise in Source Range Cables.Personnel Directed to Use Local Grounds for Welding Activities
page: https://kanterella.com/05000483/LER-2D1986-2D004-2C_-3Aon_860307-2Creactor_Protection_Sys_Logic_Actuation_Occurred.Caused_by_Spurious_Electrical_Noise_in_Source_Range_Cables.Personnel_Directed_to_Use_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000483/LER-1986-004, :on 860307,reactor Protection Sys Logic Actuation Occurred.Caused by Spurious Electrical Noise in Source Range Cables.Personnel Directed to Use Local Grounds for Welding Activities

LER-1997-019, :on 971104,discovered That Closure of RBCCW Sys Valves Which Isolate non-essential Heat Loads Were Not Translated Into Procedure.Caused by Inadequate Design Control.Performed SE & Revised Procedures
type: Subject
label: 05000293/LER-1997-019, :on 971104,discovered That Closure of RBCCW Sys Valves Which Isolate non-essential Heat Loads Were Not Translated Into Procedure.Caused by Inadequate Design Control.Performed SE & Revised Procedures
page: https://kanterella.com/05000293/LER-2D1997-2D019-2C_-3Aon_971104-2Cdiscovered_That_Closure_of_RBCCW_Sys_Valves_Which_Isolate_non-2Dessential_Heat_Loads_Were_Not_Translated_Into_Procedure.Caused_by_Ina…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1997-019, :on 971104,discovered That Closure of RBCCW Sys Valves Which Isolate non-essential Heat Loads Were Not Translated Into Procedure.Caused by Inadequate Design Control.Performed SE & Revised Procedures

LER-1986-027, :on 860603,determined That Surveillance Requirements for Diesel Generators Not Performed as Required Due to Circuit Logic.Sys Design Prevents Performance.Tech Spec Rev Request Resubmitted
type: Subject
label: 05000327/LER-1986-027, :on 860603,determined That Surveillance Requirements for Diesel Generators Not Performed as Required Due to Circuit Logic.Sys Design Prevents Performance.Tech Spec Rev Request Resubmitted
page: https://kanterella.com/05000327/LER-2D1986-2D027-2C_-3Aon_860603-2Cdetermined_That_Surveillance_Requirements_for_Diesel_Generators_Not_Performed_as_Required_Due_to_Circuit_Logic.Sys_Design_Prevents_Pe…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000327/LER-1986-027, :on 860603,determined That Surveillance Requirements for Diesel Generators Not Performed as Required Due to Circuit Logic.Sys Design Prevents Performance.Tech Spec Rev Request Resubmitted

LER-1998-007-03, :on 981215,inadequate Surveillances Were Found. Caused by Wiring Error & Improperly Performed Response Time Testing.Wiring Error Corrected & Procedures Changed to Allow Online Testing
type: Subject
label: 05000424/LER-1998-007-03, :on 981215,inadequate Surveillances Were Found. Caused by Wiring Error & Improperly Performed Response Time Testing.Wiring Error Corrected & Procedures Changed to Allow Online Testing
page: https://kanterella.com/05000424/LER-2D1998-2D007-2D03-2C_-3Aon_981215-2Cinadequate_Surveillances_Were_Found._Caused_by_Wiring_Error_-26_Improperly_Performed_Response_Time_Testing.Wiring_Error_Correcte…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000424/LER-1998-007-03, :on 981215,inadequate Surveillances Were Found. Caused by Wiring Error & Improperly Performed Response Time Testing.Wiring Error Corrected & Procedures Changed to Allow Online Testing

LER-1997-012, :on 971017,deenergized Control Rods While in Power Operation.Caused by Failure of Individual Barriers to Prevent Inadequate Performance.Post Maint Testing Was Performed.Pages 5,6 & 7 of Incoming Submittal Not Included
type: Subject
label: 05000255/LER-1997-012, :on 971017,deenergized Control Rods While in Power Operation.Caused by Failure of Individual Barriers to Prevent Inadequate Performance.Post Maint Testing Was Performed.Pages 5,6 & 7 of Incoming Submittal Not Included
page: https://kanterella.com/05000255/LER-2D1997-2D012-2C_-3Aon_971017-2Cdeenergized_Control_Rods_While_in_Power_Operation.Caused_by_Failure_of_Individual_Barriers_to_Prevent_Inadequate_Performance.Post_Mai…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000255/LER-1997-012, :on 971017,deenergized Control Rods While in Power Operation.Caused by Failure of Individual Barriers to Prevent Inadequate Performance.Post Maint Testing Was Performed.Pages 5,6 & 7 of Incoming Submittal Not Included

Or Developed.With
type: Subject
label: 05000413/LER-1998-018-01, :on 981214,identified That There No Single Procedure That Specifically Verified Response Time for Two SI RT Functions.Caused by Inadequate Procedures.Procedures Will Be Revised &/Or Developed.With
page: https://kanterella.com/05000413/LER-2D1998-2D018-2D01-2C_-3Aon_981214-2Cidentified_That_There_No_Single_Procedure_That_Specifically_Verified_Response_Time_for_Two_SI_RT_Functions.Caused_by_Inadequate_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000413/LER-1998-018-01, :on 981214,identified That There No Single Procedure That Specifically Verified Response Time for Two SI RT Functions.Caused by Inadequate Procedures.Procedures Will Be Revised &/Or Developed.With

Rms Determined Inoperable.Caused by Personnel Error Due to Incorrect Interpretation of Ts.Compensatory Sampling to Be Conducted in Time Frame Required
type: Subject
label: 05000213/LER-1997-019, :on 970808,compensatory Sampling Frequency Exceeded W/Rms Determined Inoperable.Caused by Personnel Error Due to Incorrect Interpretation of Ts.Compensatory Sampling to Be Conducted in Time Frame Required
page: https://kanterella.com/05000213/LER-2D1997-2D019-2C_-3Aon_970808-2Ccompensatory_Sampling_Frequency_Exceeded_W/Rms_Determined_Inoperable.Caused_by_Personnel_Error_Due_to_Incorrect_Interpretation_of_Ts.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000213/LER-1997-019, :on 970808,compensatory Sampling Frequency Exceeded W/Rms Determined Inoperable.Caused by Personnel Error Due to Incorrect Interpretation of Ts.Compensatory Sampling to Be Conducted in Time Frame Required

LER-1997-013, :on 971002,potential Condition Adverse to Quality Rept Documented Failure to Perform Surveillance Test Before TS Surveillance Late Date.Caused by Administrative Error.Missed Surveillance Completed
type: Subject
label: 05000346/LER-1997-013, :on 971002,potential Condition Adverse to Quality Rept Documented Failure to Perform Surveillance Test Before TS Surveillance Late Date.Caused by Administrative Error.Missed Surveillance Completed
page: https://kanterella.com/05000346/LER-2D1997-2D013-2C_-3Aon_971002-2Cpotential_Condition_Adverse_to_Quality_Rept_Documented_Failure_to_Perform_Surveillance_Test_Before_TS_Surveillance_Late_Date.Caused_b…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000346/LER-1997-013, :on 971002,potential Condition Adverse to Quality Rept Documented Failure to Perform Surveillance Test Before TS Surveillance Late Date.Caused by Administrative Error.Missed Surveillance Completed

LER-1986-008-01, :on 860212,two Events Experienced Re Failure of Air Solenoid Valves,Utilized in Diesel Air Start Sys,To Fully Close.Caused by Corrosion Products Entering Valves from Air Sys Piping.Air Sys Blown Down Daily
type: Subject
label: 05000259/LER-1986-008-01, :on 860212,two Events Experienced Re Failure of Air Solenoid Valves,Utilized in Diesel Air Start Sys,To Fully Close.Caused by Corrosion Products Entering Valves from Air Sys Piping.Air Sys Blown Down Daily
page: https://kanterella.com/05000259/LER-2D1986-2D008-2D01-2C_-3Aon_860212-2Ctwo_Events_Experienced_Re_Failure_of_Air_Solenoid_Valves-2CUtilized_in_Diesel_Air_Start_Sys-2CTo_Fully_Close.Caused_by_Corrosion…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000259/LER-1986-008-01, :on 860212,two Events Experienced Re Failure of Air Solenoid Valves,Utilized in Diesel Air Start Sys,To Fully Close.Caused by Corrosion Products Entering Valves from Air Sys Piping.Air Sys Blown Down Daily

neoprene-lined Piping T Section. Event Review Team Formed to Investigate.With
type: Subject
label: 05000324/LER-1998-005-02, :on 981123,chlorine Leak Results in CREVS & Suspended Fire Watches,Occurred.Caused by through-wall Perforation in Cast steel/neoprene-lined Piping T Section. Event Review Team Formed to Investigate.With
page: https://kanterella.com/05000324/LER-2D1998-2D005-2D02-2C_-3Aon_981123-2Cchlorine_Leak_Results_in_CREVS_-26_Suspended_Fire_Watches-2COccurred.Caused_by_through-2Dwall_Perforation_in_Cast_steel/neoprene…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000324/LER-1998-005-02, :on 981123,chlorine Leak Results in CREVS & Suspended Fire Watches,Occurred.Caused by through-wall Perforation in Cast steel/neoprene-lined Piping T Section. Event Review Team Formed to Investigate.With

LER-1997-026, :on 971206,automatic Scram Was Initiated.Caused by High Reactor Water Level During Power Ascension.Pilot Valve Clip Was Repositioned Inside Bailey Positioner & Valve Was Stroked Smoothly
type: Subject
label: 05000293/LER-1997-026, :on 971206,automatic Scram Was Initiated.Caused by High Reactor Water Level During Power Ascension.Pilot Valve Clip Was Repositioned Inside Bailey Positioner & Valve Was Stroked Smoothly
page: https://kanterella.com/05000293/LER-2D1997-2D026-2C_-3Aon_971206-2Cautomatic_Scram_Was_Initiated.Caused_by_High_Reactor_Water_Level_During_Power_Ascension.Pilot_Valve_Clip_Was_Repositioned_Inside_Bail…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1997-026, :on 971206,automatic Scram Was Initiated.Caused by High Reactor Water Level During Power Ascension.Pilot Valve Clip Was Repositioned Inside Bailey Positioner & Valve Was Stroked Smoothly

LER-1998-017-01, :on 981128,missed Surveillance Was Noted.Caused by Inadequate Work Planning.Operations Mgt Expectations for Performance of Qpt SR Were Communicated to Appropriate Operations Personnel
type: Subject
label: 05000269/LER-1998-017-01, :on 981128,missed Surveillance Was Noted.Caused by Inadequate Work Planning.Operations Mgt Expectations for Performance of Qpt SR Were Communicated to Appropriate Operations Personnel
page: https://kanterella.com/05000269/LER-2D1998-2D017-2D01-2C_-3Aon_981128-2Cmissed_Surveillance_Was_Noted.Caused_by_Inadequate_Work_Planning.Operations_Mgt_Expectations_for_Performance_of_Qpt_SR_Were_Comm…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000269/LER-1998-017-01, :on 981128,missed Surveillance Was Noted.Caused by Inadequate Work Planning.Operations Mgt Expectations for Performance of Qpt SR Were Communicated to Appropriate Operations Personnel

Esf Actuation Were Noted.Caused by Displaced Open Limit Switch Arms.Open Limit Switch for Mstv a Was Relocated Closer to Valve Position Bar
type: Subject
label: 05000281/LER-1997-004-02, :on 971202,invalid Mstv Indication Results in Manual Reactor Trip W/Esf Actuation Were Noted.Caused by Displaced Open Limit Switch Arms.Open Limit Switch for Mstv a Was Relocated Closer to Valve Position Bar
page: https://kanterella.com/05000281/LER-2D1997-2D004-2D02-2C_-3Aon_971202-2Cinvalid_Mstv_Indication_Results_in_Manual_Reactor_Trip_W/Esf_Actuation_Were_Noted.Caused_by_Displaced_Open_Limit_Switch_Arms.Ope…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000281/LER-1997-004-02, :on 971202,invalid Mstv Indication Results in Manual Reactor Trip W/Esf Actuation Were Noted.Caused by Displaced Open Limit Switch Arms.Open Limit Switch for Mstv a Was Relocated Closer to Valve Position Bar

LER-1985-073, :on 850915,step Determining RCS (AB) Flowrate Signed Off as Not Applicable.Flowrate Determination Also Missed in Surveillances on 850606 & 0705.Flowrate Verified Satisfactory by Completion of 41ST-12218
type: Subject
label: 05000528/LER-1985-073, :on 850915,step Determining RCS (AB) Flowrate Signed Off as Not Applicable.Flowrate Determination Also Missed in Surveillances on 850606 & 0705.Flowrate Verified Satisfactory by Completion of 41ST-12218
page: https://kanterella.com/05000528/LER-2D1985-2D073-2C_-3Aon_850915-2Cstep_Determining_RCS_-28AB-29_Flowrate_Signed_Off_as_Not_Applicable.Flowrate_Determination_Also_Missed_in_Surveillances_on_850606_-26…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000528/LER-1985-073, :on 850915,step Determining RCS (AB) Flowrate Signed Off as Not Applicable.Flowrate Determination Also Missed in Surveillances on 850606 & 0705.Flowrate Verified Satisfactory by Completion of 41ST-12218

LER-1997-030, :on 971122,inoperability of CAC Sys Vacuum Breaker Isolation Valves Noted.Caused by Failure to Review Accumulator Sizing Calculation.Repaired Subject Valves, Revised Procedures & Updated IST Program
type: Subject
label: 05000354/LER-1997-030, :on 971122,inoperability of CAC Sys Vacuum Breaker Isolation Valves Noted.Caused by Failure to Review Accumulator Sizing Calculation.Repaired Subject Valves, Revised Procedures & Updated IST Program
page: https://kanterella.com/05000354/LER-2D1997-2D030-2C_-3Aon_971122-2Cinoperability_of_CAC_Sys_Vacuum_Breaker_Isolation_Valves_Noted.Caused_by_Failure_to_Review_Accumulator_Sizing_Calculation.Repaired_Su…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000354/LER-1997-030, :on 971122,inoperability of CAC Sys Vacuum Breaker Isolation Valves Noted.Caused by Failure to Review Accumulator Sizing Calculation.Repaired Subject Valves, Revised Procedures & Updated IST Program

LER-1998-011, :on 981029,determined That Control Complex Chillers May Have Operated Outside Design Basis.Caused by non-conservative Assumption Used in RB Temp Profile Analysis.Implemented Procedural Controls.With
type: Subject
label: 05000302/LER-1998-011, :on 981029,determined That Control Complex Chillers May Have Operated Outside Design Basis.Caused by non-conservative Assumption Used in RB Temp Profile Analysis.Implemented Procedural Controls.With
page: https://kanterella.com/05000302/LER-2D1998-2D011-2C_-3Aon_981029-2Cdetermined_That_Control_Complex_Chillers_May_Have_Operated_Outside_Design_Basis.Caused_by_non-2Dconservative_Assumption_Used_in_RB_Te…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000302/LER-1998-011, :on 981029,determined That Control Complex Chillers May Have Operated Outside Design Basis.Caused by non-conservative Assumption Used in RB Temp Profile Analysis.Implemented Procedural Controls.With

05000369/LER-1996-005-01, :on 961101,TS Required Shutdown of Both Units Due to Failed Surveillance Test of Vital Battery Evcc.Caused Is Unknown.Replaced & Retested Vital Battery Bank Evcc
type: Subject
page: https://kanterella.com/05000369/LER-2D1996-2D005-2D01-2C_-3Aon_961101-2CTS_Required_Shutdown_of_Both_Units_Due_to_Failed_Surveillance_Test_of_Vital_Battery_Evcc.Caused_Is_Unknown.Replaced_-26_Retested…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000369/LER-1996-005-01, :on 961101,TS Required Shutdown of Both Units Due to Failed Surveillance Test of Vital Battery Evcc.Caused Is Unknown.Replaced & Retested Vital Battery Bank Evcc

LER-1999-007-01, :on 990518,discharge Filter Associated with Crss Cubicle Sump Pump 3DAS-8A,was Determined to Be Contaminated.Caused by Back Leakage from Contaminated Drains Feeding Into ECCS Pump.Lines Modified.With
type: Subject
label: 05000423/LER-1999-007-01, :on 990518,discharge Filter Associated with Crss Cubicle Sump Pump 3DAS-8A,was Determined to Be Contaminated.Caused by Back Leakage from Contaminated Drains Feeding Into ECCS Pump.Lines Modified.With
page: https://kanterella.com/05000423/LER-2D1999-2D007-2D01-2C_-3Aon_990518-2Cdischarge_Filter_Associated_with_Crss_Cubicle_Sump_Pump_3DAS-2D8A-2Cwas_Determined_to_Be_Contaminated.Caused_by_Back_Leakage_fro…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000423/LER-1999-007-01, :on 990518,discharge Filter Associated with Crss Cubicle Sump Pump 3DAS-8A,was Determined to Be Contaminated.Caused by Back Leakage from Contaminated Drains Feeding Into ECCS Pump.Lines Modified.With

LER-1998-006-04, :on 981021,rod Control Sys Malfunction Occurred Due to Failed Card Leading to Manual Reactor Trip & Esf. Reactor Startup Was Suspended & Troubleshooting Efforts Were Initiated & Slave Cycler Lift Decoder Card Was Replaced
type: Subject
label: 05000414/LER-1998-006-04, :on 981021,rod Control Sys Malfunction Occurred Due to Failed Card Leading to Manual Reactor Trip & Esf. Reactor Startup Was Suspended & Troubleshooting Efforts Were Initiated & Slave Cycler Lift Decoder Card Was Replaced
page: https://kanterella.com/05000414/LER-2D1998-2D006-2D04-2C_-3Aon_981021-2Crod_Control_Sys_Malfunction_Occurred_Due_to_Failed_Card_Leading_to_Manual_Reactor_Trip_-26_Esf._Reactor_Startup_Was_Suspended_-2…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000414/LER-1998-006-04, :on 981021,rod Control Sys Malfunction Occurred Due to Failed Card Leading to Manual Reactor Trip & Esf. Reactor Startup Was Suspended & Troubleshooting Efforts Were Initiated & Slave Cycler Lift Decoder Card Was Replaced

LER-1987-018-02, :on 871221,inadvertent Emergency Diesel Generator (EDG) Start Occurred During Testing.Caused by Personnel Error.Periodic Test Terminated & EDG Secured & Returned to Normal Standby Status
type: Subject
label: 05000339/LER-1987-018-02, :on 871221,inadvertent Emergency Diesel Generator (EDG) Start Occurred During Testing.Caused by Personnel Error.Periodic Test Terminated & EDG Secured & Returned to Normal Standby Status
page: https://kanterella.com/05000339/LER-2D1987-2D018-2D02-2C_-3Aon_871221-2Cinadvertent_Emergency_Diesel_Generator_-28EDG-29_Start_Occurred_During_Testing.Caused_by_Personnel_Error.Periodic_Test_Terminate…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000339/LER-1987-018-02, :on 871221,inadvertent Emergency Diesel Generator (EDG) Start Occurred During Testing.Caused by Personnel Error.Periodic Test Terminated & EDG Secured & Returned to Normal Standby Status

LER-1999-005-01, :on 990510,failure to Perform Surveillance on RCS Pressurizer Heater Penetration Breakers Was Noted.Caused by Lack of Mgt Support.Required Surveillance of Identified Ten Breakers Was Completed
type: Subject
label: 05000423/LER-1999-005-01, :on 990510,failure to Perform Surveillance on RCS Pressurizer Heater Penetration Breakers Was Noted.Caused by Lack of Mgt Support.Required Surveillance of Identified Ten Breakers Was Completed
page: https://kanterella.com/05000423/LER-2D1999-2D005-2D01-2C_-3Aon_990510-2Cfailure_to_Perform_Surveillance_on_RCS_Pressurizer_Heater_Penetration_Breakers_Was_Noted.Caused_by_Lack_of_Mgt_Support.Required_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000423/LER-1999-005-01, :on 990510,failure to Perform Surveillance on RCS Pressurizer Heater Penetration Breakers Was Noted.Caused by Lack of Mgt Support.Required Surveillance of Identified Ten Breakers Was Completed

LER-1998-002-05, :on 981016,turbine Trip Occurred Followed by Reactor Trip.Caused by Generator Lockout.Mod Being Evaluated to Physically Isolate Relays from Vibration of Transformers & Adding Two of Two Logic for Actuation of Sudden Pressure
type: Subject
label: 05000328/LER-1998-002-05, :on 981016,turbine Trip Occurred Followed by Reactor Trip.Caused by Generator Lockout.Mod Being Evaluated to Physically Isolate Relays from Vibration of Transformers & Adding Two of Two Logic for Actuation of Sudden Pressure
page: https://kanterella.com/05000328/LER-2D1998-2D002-2D05-2C_-3Aon_981016-2Cturbine_Trip_Occurred_Followed_by_Reactor_Trip.Caused_by_Generator_Lockout.Mod_Being_Evaluated_to_Physically_Isolate_Relays_from…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000328/LER-1998-002-05, :on 981016,turbine Trip Occurred Followed by Reactor Trip.Caused by Generator Lockout.Mod Being Evaluated to Physically Isolate Relays from Vibration of Transformers & Adding Two of Two Logic for Actuation of Sudden Pressure

05000321/LER-1999-003-01, :on 990507,incorrect Performance of Equipment Clearance Led to Scram on High Reactor Pressure.Caused by Personnel Error.Personnel Disciplined & Improved Procedure.With
type: Subject
page: https://kanterella.com/05000321/LER-2D1999-2D003-2D01-2C_-3Aon_990507-2Cincorrect_Performance_of_Equipment_Clearance_Led_to_Scram_on_High_Reactor_Pressure.Caused_by_Personnel_Error.Personnel_Disciplin…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000321/LER-1999-003-01, :on 990507,incorrect Performance of Equipment Clearance Led to Scram on High Reactor Pressure.Caused by Personnel Error.Personnel Disciplined & Improved Procedure.With

05000327/LER-1988-021-01, :on 880523,loss of Operating Train of RHR Sys Occurred.Caused by Opening of Manual Isolation Valve.Train B RHR Pump Stopped by Placing in put-to-lock Condition
type: Subject
page: https://kanterella.com/05000327/LER-2D1988-2D021-2D01-2C_-3Aon_880523-2Closs_of_Operating_Train_of_RHR_Sys_Occurred.Caused_by_Opening_of_Manual_Isolation_Valve.Train_B_RHR_Pump_Stopped_by_Placing_in_p…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000327/LER-1988-021-01, :on 880523,loss of Operating Train of RHR Sys Occurred.Caused by Opening of Manual Isolation Valve.Train B RHR Pump Stopped by Placing in put-to-lock Condition

Tech Spec Action
type: Subject
label: 05000423/LER-1988-017, :on 880425,4 H Sample Flow Rate Estimate Not Performed Per Tech Spec 3.3.3.10.Caused by Personnel Error. Written Communications Between Depts Required When Directing Another Dept to Comply W/Tech Spec Action
page: https://kanterella.com/05000423/LER-2D1988-2D017-2C_-3Aon_880425-2C4_H_Sample_Flow_Rate_Estimate_Not_Performed_Per_Tech_Spec_3.3.3.10.Caused_by_Personnel_Error._Written_Communications_Between_Depts_Re…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000423/LER-1988-017, :on 880425,4 H Sample Flow Rate Estimate Not Performed Per Tech Spec 3.3.3.10.Caused by Personnel Error. Written Communications Between Depts Required When Directing Another Dept to Comply W/Tech Spec Action

LER-1998-005-02, :on 980824,surveillance Was Not Performed When DG Was Rendered Inoperable.Caused by Failure to Control Amount of Debris at DG Exhaust.Expectations for Controlling Work on SR Sys Were re-emphasized.With
type: Subject
label: 05000424/LER-1998-005-02, :on 980824,surveillance Was Not Performed When DG Was Rendered Inoperable.Caused by Failure to Control Amount of Debris at DG Exhaust.Expectations for Controlling Work on SR Sys Were re-emphasized.With
page: https://kanterella.com/05000424/LER-2D1998-2D005-2D02-2C_-3Aon_980824-2Csurveillance_Was_Not_Performed_When_DG_Was_Rendered_Inoperable.Caused_by_Failure_to_Control_Amount_of_Debris_at_DG_Exhaust.Expec…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000424/LER-1998-005-02, :on 980824,surveillance Was Not Performed When DG Was Rendered Inoperable.Caused by Failure to Control Amount of Debris at DG Exhaust.Expectations for Controlling Work on SR Sys Were re-emphasized.With

05000338/LER-1998-003, :on 980804,service Water Supports Surveillance Was Missed.Caused by Personnel Error.Component Supports Were Examined & Found to Be Acceptable.With
type: Subject
page: https://kanterella.com/05000338/LER-2D1998-2D003-2C_-3Aon_980804-2Cservice_Water_Supports_Surveillance_Was_Missed.Caused_by_Personnel_Error.Component_Supports_Were_Examined_-26_Found_to_Be_Acceptable.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000338/LER-1998-003, :on 980804,service Water Supports Surveillance Was Missed.Caused by Personnel Error.Component Supports Were Examined & Found to Be Acceptable.With

LER-1998-006-02, :on 980812,noncompliance with Ice Condenser TS SR 4.6.5.1b.3 Noted.Caused by Lack of Clear Documentation Re Interpretation of TS SR 4.6.5.1b.3.Submitted TS Amend to Clearly Establish SR & Will Review Ice Condenser TSs
type: Subject
label: 05000369/LER-1998-006-02, :on 980812,noncompliance with Ice Condenser TS SR 4.6.5.1b.3 Noted.Caused by Lack of Clear Documentation Re Interpretation of TS SR 4.6.5.1b.3.Submitted TS Amend to Clearly Establish SR & Will Review Ice Condenser TSs
page: https://kanterella.com/05000369/LER-2D1998-2D006-2D02-2C_-3Aon_980812-2Cnoncompliance_with_Ice_Condenser_TS_SR_4.6.5.1b.3_Noted.Caused_by_Lack_of_Clear_Documentation_Re_Interpretation_of_TS_SR_4.6.5.1…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000369/LER-1998-006-02, :on 980812,noncompliance with Ice Condenser TS SR 4.6.5.1b.3 Noted.Caused by Lack of Clear Documentation Re Interpretation of TS SR 4.6.5.1b.3.Submitted TS Amend to Clearly Establish SR & Will Review Ice Condenser TSs

05000334/LER-1997-018, :on 970705,potential for Spurious Seismically Induced FPS Sys Activation Affecting EDG Was Noted.Caused by Deficiency in Original Design.Established Fire Watch
type: Subject
page: https://kanterella.com/05000334/LER-2D1997-2D018-2C_-3Aon_970705-2Cpotential_for_Spurious_Seismically_Induced_FPS_Sys_Activation_Affecting_EDG_Was_Noted.Caused_by_Deficiency_in_Original_Design.Establi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000334/LER-1997-018, :on 970705,potential for Spurious Seismically Induced FPS Sys Activation Affecting EDG Was Noted.Caused by Deficiency in Original Design.Established Fire Watch

LER-1997-015, :on 970501,voluntary Entry Was Proceduralized Into TS 3.0.3 by Allowing Bypass of Source Range Channels Input to High Flux Trip.Caused by Misinterpretation of TS 3.3.1.1,Table 3.3-1,Item 6.Changed Procedure
type: Subject
label: 05000334/LER-1997-015, :on 970501,voluntary Entry Was Proceduralized Into TS 3.0.3 by Allowing Bypass of Source Range Channels Input to High Flux Trip.Caused by Misinterpretation of TS 3.3.1.1,Table 3.3-1,Item 6.Changed Procedure
page: https://kanterella.com/05000334/LER-2D1997-2D015-2C_-3Aon_970501-2Cvoluntary_Entry_Was_Proceduralized_Into_TS_3.0.3_by_Allowing_Bypass_of_Source_Range_Channels_Input_to_High_Flux_Trip.Caused_by_Misint…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000334/LER-1997-015, :on 970501,voluntary Entry Was Proceduralized Into TS 3.0.3 by Allowing Bypass of Source Range Channels Input to High Flux Trip.Caused by Misinterpretation of TS 3.3.1.1,Table 3.3-1,Item 6.Changed Procedure

LER-1996-001-01, :on 960117,Units 1 Inverter IV1PC2 Output Breaker Tripped on Over Current.Caused by Large Tavg -Tref Error Signal Following Restoration of Power to Distribution Panel.Plat Stabilized to Mode 3
type: Subject
label: 05000445/LER-1996-001-01, :on 960117,Units 1 Inverter IV1PC2 Output Breaker Tripped on Over Current.Caused by Large Tavg -Tref Error Signal Following Restoration of Power to Distribution Panel.Plat Stabilized to Mode 3
page: https://kanterella.com/05000445/LER-2D1996-2D001-2D01-2C_-3Aon_960117-2CUnits_1_Inverter_IV1PC2_Output_Breaker_Tripped_on_Over_Current.Caused_by_Large_Tavg_-2DTref_Error_Signal_Following_Restoration_o…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000445/LER-1996-001-01, :on 960117,Units 1 Inverter IV1PC2 Output Breaker Tripped on Over Current.Caused by Large Tavg -Tref Error Signal Following Restoration of Power to Distribution Panel.Plat Stabilized to Mode 3

LER-1994-010, :on 941114,discovered That Door Between Control Complex & Bldg Roof Blocked Open for Roofing Work,Resulting in Operation Outside Design Basis.Caused by Personnel Error. Door Immediately Closed
type: Subject
label: 05000302/LER-1994-010, :on 941114,discovered That Door Between Control Complex & Bldg Roof Blocked Open for Roofing Work,Resulting in Operation Outside Design Basis.Caused by Personnel Error. Door Immediately Closed
page: https://kanterella.com/05000302/LER-2D1994-2D010-2C_-3Aon_941114-2Cdiscovered_That_Door_Between_Control_Complex_-26_Bldg_Roof_Blocked_Open_for_Roofing_Work-2CResulting_in_Operation_Outside_Design_Basi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000302/LER-1994-010, :on 941114,discovered That Door Between Control Complex & Bldg Roof Blocked Open for Roofing Work,Resulting in Operation Outside Design Basis.Caused by Personnel Error. Door Immediately Closed

LER-1987-010-01, :on 871209,unit Shutdown Due to Pressure Boundary Leakage on RCS Loop B Cold Safety Injection Line Between Check Valve & Loop.Caused by Cracked Joint Due to Fatigue.Defective Pipe Section Replaced
type: Subject
label: 05000364/LER-1987-010-01, :on 871209,unit Shutdown Due to Pressure Boundary Leakage on RCS Loop B Cold Safety Injection Line Between Check Valve & Loop.Caused by Cracked Joint Due to Fatigue.Defective Pipe Section Replaced
page: https://kanterella.com/05000364/LER-2D1987-2D010-2D01-2C_-3Aon_871209-2Cunit_Shutdown_Due_to_Pressure_Boundary_Leakage_on_RCS_Loop_B_Cold_Safety_Injection_Line_Between_Check_Valve_-26_Loop.Caused_by_C…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000364/LER-1987-010-01, :on 871209,unit Shutdown Due to Pressure Boundary Leakage on RCS Loop B Cold Safety Injection Line Between Check Valve & Loop.Caused by Cracked Joint Due to Fatigue.Defective Pipe Section Replaced

LER-1997-019, :on 970529,non-compliance with TS 3.3.3.6 for Containment Isolation Valve Position Indication Was Noted. Caused by Misinterpretation of Requirements of RG 1.97. Revised Submittal to NRC
type: Subject
label: 05000382/LER-1997-019, :on 970529,non-compliance with TS 3.3.3.6 for Containment Isolation Valve Position Indication Was Noted. Caused by Misinterpretation of Requirements of RG 1.97. Revised Submittal to NRC
page: https://kanterella.com/05000382/LER-2D1997-2D019-2C_-3Aon_970529-2Cnon-2Dcompliance_with_TS_3.3.3.6_for_Containment_Isolation_Valve_Position_Indication_Was_Noted._Caused_by_Misinterpretation_of_Requir…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1997-019, :on 970529,non-compliance with TS 3.3.3.6 for Containment Isolation Valve Position Indication Was Noted. Caused by Misinterpretation of Requirements of RG 1.97. Revised Submittal to NRC

05000285/LER-1997-005, :on 970530,improper Entry Into High Radiation Area Occurred.Caused by Lack of self-checking & Inattention to Detail.Discussed Event W/Plant Staff & Counseled Individual Involved
type: Subject
page: https://kanterella.com/05000285/LER-2D1997-2D005-2C_-3Aon_970530-2Cimproper_Entry_Into_High_Radiation_Area_Occurred.Caused_by_Lack_of_self-2Dchecking_-26_Inattention_to_Detail.Discussed_Event_W/Plant_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1997-005, :on 970530,improper Entry Into High Radiation Area Occurred.Caused by Lack of self-checking & Inattention to Detail.Discussed Event W/Plant Staff & Counseled Individual Involved

LER-1997-006-01, :on 970424,reactor Bldg Fan Motors Unqualified Cable Termination Occurred Due to Incorrect Engineering Guidance.Caused by Personnel Error.Qualifiable Repair of AH-E-1A Fan Motor Termination Was Installed on 970323
type: Subject
label: 05000289/LER-1997-006-01, :on 970424,reactor Bldg Fan Motors Unqualified Cable Termination Occurred Due to Incorrect Engineering Guidance.Caused by Personnel Error.Qualifiable Repair of AH-E-1A Fan Motor Termination Was Installed on 970323
page: https://kanterella.com/05000289/LER-2D1997-2D006-2D01-2C_-3Aon_970424-2Creactor_Bldg_Fan_Motors_Unqualified_Cable_Termination_Occurred_Due_to_Incorrect_Engineering_Guidance.Caused_by_Personnel_Error.Q…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000289/LER-1997-006-01, :on 970424,reactor Bldg Fan Motors Unqualified Cable Termination Occurred Due to Incorrect Engineering Guidance.Caused by Personnel Error.Qualifiable Repair of AH-E-1A Fan Motor Termination Was Installed on 970323

Only One of Two Diesel Generators Operable,Violating Tech Spec Section 3.04.Caused by Personnel Error.Addl Attention Directed to Tech Spec Actions Statements & Mode Changes
type: Subject
label: 05000336/LER-1988-007, :on 880216,plant Entered Mode 3 W/Only One of Two Diesel Generators Operable,Violating Tech Spec Section 3.04.Caused by Personnel Error.Addl Attention Directed to Tech Spec Actions Statements & Mode Changes
page: https://kanterella.com/05000336/LER-2D1988-2D007-2C_-3Aon_880216-2Cplant_Entered_Mode_3_W/Only_One_of_Two_Diesel_Generators_Operable-2CViolating_Tech_Spec_Section_3.04.Caused_by_Personnel_Error.Addl_A…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1988-007, :on 880216,plant Entered Mode 3 W/Only One of Two Diesel Generators Operable,Violating Tech Spec Section 3.04.Caused by Personnel Error.Addl Attention Directed to Tech Spec Actions Statements & Mode Changes

LER-1988-006-01, :on 880218,combined Bypass Leakage Rate Exceeded Tech Spec 3.6.1.2.C Limit.Caused by Debris Lodged in Caged Area of Valve Preventing Plug from Entering Seat. Debris Removed & Seating Surface Cleaned
type: Subject
label: 05000336/LER-1988-006-01, :on 880218,combined Bypass Leakage Rate Exceeded Tech Spec 3.6.1.2.C Limit.Caused by Debris Lodged in Caged Area of Valve Preventing Plug from Entering Seat. Debris Removed & Seating Surface Cleaned
page: https://kanterella.com/05000336/LER-2D1988-2D006-2D01-2C_-3Aon_880218-2Ccombined_Bypass_Leakage_Rate_Exceeded_Tech_Spec_3.6.1.2.C_Limit.Caused_by_Debris_Lodged_in_Caged_Area_of_Valve_Preventing_Plug_f…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1988-006-01, :on 880218,combined Bypass Leakage Rate Exceeded Tech Spec 3.6.1.2.C Limit.Caused by Debris Lodged in Caged Area of Valve Preventing Plug from Entering Seat. Debris Removed & Seating Surface Cleaned

LER-1997-004, :on 970219,potential for Fuel Assembly Exceeding Maximum Load Limit Over Spent Fuel Pool.Cause Due to Removing Exclusion for Fuel Assemblies from TS Requirements in 1989.TS Will Be Amended
type: Subject
label: 05000213/LER-1997-004, :on 970219,potential for Fuel Assembly Exceeding Maximum Load Limit Over Spent Fuel Pool.Cause Due to Removing Exclusion for Fuel Assemblies from TS Requirements in 1989.TS Will Be Amended
page: https://kanterella.com/05000213/LER-2D1997-2D004-2C_-3Aon_970219-2Cpotential_for_Fuel_Assembly_Exceeding_Maximum_Load_Limit_Over_Spent_Fuel_Pool.Cause_Due_to_Removing_Exclusion_for_Fuel_Assemblies_fro…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000213/LER-1997-004, :on 970219,potential for Fuel Assembly Exceeding Maximum Load Limit Over Spent Fuel Pool.Cause Due to Removing Exclusion for Fuel Assemblies from TS Requirements in 1989.TS Will Be Amended

05000336/LER-1987-013-02, :on 871219,fire Watch Patrol Failed to Conduct Hourly Insp Per Tech Specs.Caused by Watchstander Failure to Releive Position in Timely Manner.Fire Watch Contractor Replaced
type: Subject
page: https://kanterella.com/05000336/LER-2D1987-2D013-2D02-2C_-3Aon_871219-2Cfire_Watch_Patrol_Failed_to_Conduct_Hourly_Insp_Per_Tech_Specs.Caused_by_Watchstander_Failure_to_Releive_Position_in_Timely_Mann…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1987-013-02, :on 871219,fire Watch Patrol Failed to Conduct Hourly Insp Per Tech Specs.Caused by Watchstander Failure to Releive Position in Timely Manner.Fire Watch Contractor Replaced

05000219/LER-1997-006, :on 970419,reactor Shutdown Required by Control Rod 5% Scram Times Occurred.Caused by Sticking of Viton a Diaphragms in Scram Solenoid Pilot Valves.Diaphragms Replaced
type: Subject
page: https://kanterella.com/05000219/LER-2D1997-2D006-2C_-3Aon_970419-2Creactor_Shutdown_Required_by_Control_Rod_5-_Scram_Times_Occurred.Caused_by_Sticking_of_Viton_a_Diaphragms_in_Scram_Solenoid_Pilot_Val…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000219/LER-1997-006, :on 970419,reactor Shutdown Required by Control Rod 5% Scram Times Occurred.Caused by Sticking of Viton a Diaphragms in Scram Solenoid Pilot Valves.Diaphragms Replaced

LER-1997-003-03, :on 970424,failed to Perform Diesel Generator Surveillance Requirements.Caused by Procedural Inadequacy. Changed Shared Surveillance Schedule to Ensure Testing Will Be Performed for Each Individual Unit
type: Subject
label: 05000364/LER-1997-003-03, :on 970424,failed to Perform Diesel Generator Surveillance Requirements.Caused by Procedural Inadequacy. Changed Shared Surveillance Schedule to Ensure Testing Will Be Performed for Each Individual Unit
page: https://kanterella.com/05000364/LER-2D1997-2D003-2D03-2C_-3Aon_970424-2Cfailed_to_Perform_Diesel_Generator_Surveillance_Requirements.Caused_by_Procedural_Inadequacy._Changed_Shared_Surveillance_Schedu…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000364/LER-1997-003-03, :on 970424,failed to Perform Diesel Generator Surveillance Requirements.Caused by Procedural Inadequacy. Changed Shared Surveillance Schedule to Ensure Testing Will Be Performed for Each Individual Unit

LER-1997-005-01, :on 970410,declared motor-operated Reactor Bldg Purge Valves Inoperable Due to Inadequate Closing Torque. Caused by Deficient Design Analysis.Will Perform Evaluation of Valve Specific Seating Torque Test Data
type: Subject
label: 05000289/LER-1997-005-01, :on 970410,declared motor-operated Reactor Bldg Purge Valves Inoperable Due to Inadequate Closing Torque. Caused by Deficient Design Analysis.Will Perform Evaluation of Valve Specific Seating Torque Test Data
page: https://kanterella.com/05000289/LER-2D1997-2D005-2D01-2C_-3Aon_970410-2Cdeclared_motor-2Doperated_Reactor_Bldg_Purge_Valves_Inoperable_Due_to_Inadequate_Closing_Torque._Caused_by_Deficient_Design_Anal…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000289/LER-1997-005-01, :on 970410,declared motor-operated Reactor Bldg Purge Valves Inoperable Due to Inadequate Closing Torque. Caused by Deficient Design Analysis.Will Perform Evaluation of Valve Specific Seating Torque Test Data

05000293/LER-1997-007, :on 970401,safeguard Buses Were de-energized Due to Severe Storm.Replacement of Microprocessor Control Units Installed in Voltage Regulating Transformers
type: Subject
page: https://kanterella.com/05000293/LER-2D1997-2D007-2C_-3Aon_970401-2Csafeguard_Buses_Were_de-2Denergized_Due_to_Severe_Storm.Replacement_of_Microprocessor_Control_Units_Installed_in_Voltage_Regulating_T…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1997-007, :on 970401,safeguard Buses Were de-energized Due to Severe Storm.Replacement of Microprocessor Control Units Installed in Voltage Regulating Transformers

LER-1996-004, :on 960910,identified Seismic Concerns Re Containment Particulate & Gaseous Radiation Monitors.Caused by Personnel Error in Understanding Regulatory Requirements. Performed Review of Design Changes
type: Subject
label: 05000338/LER-1996-004, :on 960910,identified Seismic Concerns Re Containment Particulate & Gaseous Radiation Monitors.Caused by Personnel Error in Understanding Regulatory Requirements. Performed Review of Design Changes
page: https://kanterella.com/05000338/LER-2D1996-2D004-2C_-3Aon_960910-2Cidentified_Seismic_Concerns_Re_Containment_Particulate_-26_Gaseous_Radiation_Monitors.Caused_by_Personnel_Error_in_Understanding_Regu…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000338/LER-1996-004, :on 960910,identified Seismic Concerns Re Containment Particulate & Gaseous Radiation Monitors.Caused by Personnel Error in Understanding Regulatory Requirements. Performed Review of Design Changes

LER-1997-003-01, :on 970516,positive Reactivity Addition During Refueling Was Determined.Caused by Personnel Error.Control Room Crews Were Coached on Positive Reactivity Effect of Filling Cavity from R ST When RCS Is Greater
type: Subject
label: 05000338/LER-1997-003-01, :on 970516,positive Reactivity Addition During Refueling Was Determined.Caused by Personnel Error.Control Room Crews Were Coached on Positive Reactivity Effect of Filling Cavity from R ST When RCS Is Greater
page: https://kanterella.com/05000338/LER-2D1997-2D003-2D01-2C_-3Aon_970516-2Cpositive_Reactivity_Addition_During_Refueling_Was_Determined.Caused_by_Personnel_Error.Control_Room_Crews_Were_Coached_on_Positi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000338/LER-1997-003-01, :on 970516,positive Reactivity Addition During Refueling Was Determined.Caused by Personnel Error.Control Room Crews Were Coached on Positive Reactivity Effect of Filling Cavity from R ST When RCS Is Greater

O Necessary Surveillance on Some ECCS & Associated Containment Spray Motor Operated Valves.Caused by Personnel Error. Procedure STP V-7B Satisfactorily Performed
type: Subject
label: 05000323/LER-1985-023-01, :on 850725,unit Entered Hot Shutdown W/O Necessary Surveillance on Some ECCS & Associated Containment Spray Motor Operated Valves.Caused by Personnel Error. Procedure STP V-7B Satisfactorily Performed
page: https://kanterella.com/05000323/LER-2D1985-2D023-2D01-2C_-3Aon_850725-2Cunit_Entered_Hot_Shutdown_W/O_Necessary_Surveillance_on_Some_ECCS_-26_Associated_Containment_Spray_Motor_Operated_Valves.Caused_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000323/LER-1985-023-01, :on 850725,unit Entered Hot Shutdown W/O Necessary Surveillance on Some ECCS & Associated Containment Spray Motor Operated Valves.Caused by Personnel Error. Procedure STP V-7B Satisfactorily Performed

LER-1986-001-01, :on 860215,diesel Generator D Windings & Rotor Extensively Damaged.Caused by Personnel Error.Field Work Package Incomplete,Qc Involvement Informal & Work Not Properly Implemented
type: Subject
label: 05000354/LER-1986-001-01, :on 860215,diesel Generator D Windings & Rotor Extensively Damaged.Caused by Personnel Error.Field Work Package Incomplete,Qc Involvement Informal & Work Not Properly Implemented
page: https://kanterella.com/05000354/LER-2D1986-2D001-2D01-2C_-3Aon_860215-2Cdiesel_Generator_D_Windings_-26_Rotor_Extensively_Damaged.Caused_by_Personnel_Error.Field_Work_Package_Incomplete-2CQc_Involveme…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000354/LER-1986-001-01, :on 860215,diesel Generator D Windings & Rotor Extensively Damaged.Caused by Personnel Error.Field Work Package Incomplete,Qc Involvement Informal & Work Not Properly Implemented

05000255/LER-1986-009, :on 860106 & 08,watertight Fire Doors to safety-related Equipment Rooms Found Open.Caused by Personnel Failure to Follow Requirements for Fire Doors. Personnel Counseled
type: Subject
page: https://kanterella.com/05000255/LER-2D1986-2D009-2C_-3Aon_860106_-26_08-2Cwatertight_Fire_Doors_to_safety-2Drelated_Equipment_Rooms_Found_Open.Caused_by_Personnel_Failure_to_Follow_Requirements_for_Fi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000255/LER-1986-009, :on 860106 & 08,watertight Fire Doors to safety-related Equipment Rooms Found Open.Caused by Personnel Failure to Follow Requirements for Fire Doors. Personnel Counseled

05000348/LER-1996-007, :on 961107,IEEE-279 Requirements Were Not Met for Protection Channel III SG Instrumentation.Caused by Personnel Error.Implemented Administrative Controls
type: Subject
page: https://kanterella.com/05000348/LER-2D1996-2D007-2C_-3Aon_961107-2CIEEE-2D279_Requirements_Were_Not_Met_for_Protection_Channel_III_SG_Instrumentation.Caused_by_Personnel_Error.Implemented_Administrati…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000348/LER-1996-007, :on 961107,IEEE-279 Requirements Were Not Met for Protection Channel III SG Instrumentation.Caused by Personnel Error.Implemented Administrative Controls

LER-1984-044, :on 840613,average Rod Scram Insertion Time Required by Tech Spec 3.1.3.4 Not Met for All Rods. Apparently Caused by Poor Control Rod Scram Pilot Valve Performance.Valves Modified
type: Subject
label: 05000387/LER-1984-044, :on 840613,average Rod Scram Insertion Time Required by Tech Spec 3.1.3.4 Not Met for All Rods. Apparently Caused by Poor Control Rod Scram Pilot Valve Performance.Valves Modified
page: https://kanterella.com/05000387/LER-2D1984-2D044-2C_-3Aon_840613-2Caverage_Rod_Scram_Insertion_Time_Required_by_Tech_Spec_3.1.3.4_Not_Met_for_All_Rods._Apparently_Caused_by_Poor_Control_Rod_Scram_Pilo…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000387/LER-1984-044, :on 840613,average Rod Scram Insertion Time Required by Tech Spec 3.1.3.4 Not Met for All Rods. Apparently Caused by Poor Control Rod Scram Pilot Valve Performance.Valves Modified

LER-1985-076, :on 851007,reactor Trip Resulting from Loss of Offsite Power Occurred.Caused While Troubleshooting Plant Multiplexor (Pmux).Switchyard Breakers Hardwired to Bypass Pmux Breaker Control
type: Subject
label: 05000528/LER-1985-076, :on 851007,reactor Trip Resulting from Loss of Offsite Power Occurred.Caused While Troubleshooting Plant Multiplexor (Pmux).Switchyard Breakers Hardwired to Bypass Pmux Breaker Control
page: https://kanterella.com/05000528/LER-2D1985-2D076-2C_-3Aon_851007-2Creactor_Trip_Resulting_from_Loss_of_Offsite_Power_Occurred.Caused_While_Troubleshooting_Plant_Multiplexor_-28Pmux-29.Switchyard_Break…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000528/LER-1985-076, :on 851007,reactor Trip Resulting from Loss of Offsite Power Occurred.Caused While Troubleshooting Plant Multiplexor (Pmux).Switchyard Breakers Hardwired to Bypass Pmux Breaker Control

LER-1997-002, :on 970129,potential Inability of Startup Feedwater Block Valves to Fully Close Following Main Steam Line Break Occurred Due to MOV Program Weakness.Increased Torque Switch Settings on Valve Operators
type: Subject
label: 05000289/LER-1997-002, :on 970129,potential Inability of Startup Feedwater Block Valves to Fully Close Following Main Steam Line Break Occurred Due to MOV Program Weakness.Increased Torque Switch Settings on Valve Operators
page: https://kanterella.com/05000289/LER-2D1997-2D002-2C_-3Aon_970129-2Cpotential_Inability_of_Startup_Feedwater_Block_Valves_to_Fully_Close_Following_Main_Steam_Line_Break_Occurred_Due_to_MOV_Program_Weak…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000289/LER-1997-002, :on 970129,potential Inability of Startup Feedwater Block Valves to Fully Close Following Main Steam Line Break Occurred Due to MOV Program Weakness.Increased Torque Switch Settings on Valve Operators

LER-1985-021-01, :on 850722,two Automatic Initiations of Auxiliary Feedwater Sys Occurred Due to Bypass Feedwater Control Valves Malfunctioning.Caused by Moisture in Instrument Air.Actuators Inspected & Cleaned
type: Subject
label: 05000250/LER-1985-021-01, :on 850722,two Automatic Initiations of Auxiliary Feedwater Sys Occurred Due to Bypass Feedwater Control Valves Malfunctioning.Caused by Moisture in Instrument Air.Actuators Inspected & Cleaned
page: https://kanterella.com/05000250/LER-2D1985-2D021-2D01-2C_-3Aon_850722-2Ctwo_Automatic_Initiations_of_Auxiliary_Feedwater_Sys_Occurred_Due_to_Bypass_Feedwater_Control_Valves_Malfunctioning.Caused_by_Mo…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000250/LER-1985-021-01, :on 850722,two Automatic Initiations of Auxiliary Feedwater Sys Occurred Due to Bypass Feedwater Control Valves Malfunctioning.Caused by Moisture in Instrument Air.Actuators Inspected & Cleaned

Msiv Safety Function & Design.Submitted Proposed License Amend Request Ptscr 3-13-95
type: Subject
label: 05000423/LER-1997-008, :on 970124,TS 3.0.3 Action Statement for MSIV Closure Was Entered Due to TS Being Inconsistent W/Msiv Safety Function & Design.Submitted Proposed License Amend Request Ptscr 3-13-95
page: https://kanterella.com/05000423/LER-2D1997-2D008-2C_-3Aon_970124-2CTS_3.0.3_Action_Statement_for_MSIV_Closure_Was_Entered_Due_to_TS_Being_Inconsistent_W/Msiv_Safety_Function_-26_Design.Submitted_Propo…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000423/LER-1997-008, :on 970124,TS 3.0.3 Action Statement for MSIV Closure Was Entered Due to TS Being Inconsistent W/Msiv Safety Function & Design.Submitted Proposed License Amend Request Ptscr 3-13-95

05000324/LER-1996-003, :on 960317,units Declared Inoperable & Reactor Shutdown of Units Initiated.Caused by Corrosion Induced by Galvanic Coupling of Retainer Bolting.Corroded Bolting Replaced
type: Subject
page: https://kanterella.com/05000324/LER-2D1996-2D003-2C_-3Aon_960317-2Cunits_Declared_Inoperable_-26_Reactor_Shutdown_of_Units_Initiated.Caused_by_Corrosion_Induced_by_Galvanic_Coupling_of_Retainer_Boltin…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000324/LER-1996-003, :on 960317,units Declared Inoperable & Reactor Shutdown of Units Initiated.Caused by Corrosion Induced by Galvanic Coupling of Retainer Bolting.Corroded Bolting Replaced

05000282/LER-1997-003-02, :on 970325,discovered That Afp Will Trip on Low SG Pressure During Complete Loss of Feedwater ATWS Event. Operability Evaluation of Plant Was Performed
type: Subject
page: https://kanterella.com/05000282/LER-2D1997-2D003-2D02-2C_-3Aon_970325-2Cdiscovered_That_Afp_Will_Trip_on_Low_SG_Pressure_During_Complete_Loss_of_Feedwater_ATWS_Event._Operability_Evaluation_of_Plant_W…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000282/LER-1997-003-02, :on 970325,discovered That Afp Will Trip on Low SG Pressure During Complete Loss of Feedwater ATWS Event. Operability Evaluation of Plant Was Performed

LER-1996-004, :on 961120,unanalyzed Conditions Were Noted Due to Discovery of Two Spare SR Circuit Breakers Not in Seismically Qualified Position.Caused by Failure to Follow Established Procedures.Revised Procedures
type: Subject
label: 05000498/LER-1996-004, :on 961120,unanalyzed Conditions Were Noted Due to Discovery of Two Spare SR Circuit Breakers Not in Seismically Qualified Position.Caused by Failure to Follow Established Procedures.Revised Procedures
page: https://kanterella.com/05000498/LER-2D1996-2D004-2C_-3Aon_961120-2Cunanalyzed_Conditions_Were_Noted_Due_to_Discovery_of_Two_Spare_SR_Circuit_Breakers_Not_in_Seismically_Qualified_Position.Caused_by_Fa…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000498/LER-1996-004, :on 961120,unanalyzed Conditions Were Noted Due to Discovery of Two Spare SR Circuit Breakers Not in Seismically Qualified Position.Caused by Failure to Follow Established Procedures.Revised Procedures

05000266/LER-1997-015, :on 970324,control Room Ventilation Sys Declared Inoperable Due to Failures of Backdraft Damper & Vent Duct Access Door.Backdraft Damper,Replaced
type: Subject
page: https://kanterella.com/05000266/LER-2D1997-2D015-2C_-3Aon_970324-2Ccontrol_Room_Ventilation_Sys_Declared_Inoperable_Due_to_Failures_of_Backdraft_Damper_-26_Vent_Duct_Access_Door.Backdraft_Damper-2CRep…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000266/LER-1997-015, :on 970324,control Room Ventilation Sys Declared Inoperable Due to Failures of Backdraft Damper & Vent Duct Access Door.Backdraft Damper,Replaced

LER-1997-003-02, :on 970326,both Trains of Control Room Ventilation Sys Inoperable Due to Isolated Air Intake Valves.Radiation Monitor Will Be Evaluated to Determine If Changes Are Needed in Design or Maint
type: Subject
label: 05000369/LER-1997-003-02, :on 970326,both Trains of Control Room Ventilation Sys Inoperable Due to Isolated Air Intake Valves.Radiation Monitor Will Be Evaluated to Determine If Changes Are Needed in Design or Maint
page: https://kanterella.com/05000369/LER-2D1997-2D003-2D02-2C_-3Aon_970326-2Cboth_Trains_of_Control_Room_Ventilation_Sys_Inoperable_Due_to_Isolated_Air_Intake_Valves.Radiation_Monitor_Will_Be_Evaluated_to_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000369/LER-1997-003-02, :on 970326,both Trains of Control Room Ventilation Sys Inoperable Due to Isolated Air Intake Valves.Radiation Monitor Will Be Evaluated to Determine If Changes Are Needed in Design or Maint

LER-1997-009, :on 970325,discovered Steam Generator (SG) Low Pressure Setpoint Below Ts.Caused by Inadequate Surveillance Procedure.Revised Surveillance Procedure to Require Channel for Each SG to Be Placed in Bypass During Test
type: Subject
label: 05000382/LER-1997-009, :on 970325,discovered Steam Generator (SG) Low Pressure Setpoint Below Ts.Caused by Inadequate Surveillance Procedure.Revised Surveillance Procedure to Require Channel for Each SG to Be Placed in Bypass During Test
page: https://kanterella.com/05000382/LER-2D1997-2D009-2C_-3Aon_970325-2Cdiscovered_Steam_Generator_-28SG-29_Low_Pressure_Setpoint_Below_Ts.Caused_by_Inadequate_Surveillance_Procedure.Revised_Surveillance_P…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1997-009, :on 970325,discovered Steam Generator (SG) Low Pressure Setpoint Below Ts.Caused by Inadequate Surveillance Procedure.Revised Surveillance Procedure to Require Channel for Each SG to Be Placed in Bypass During Test

LER-1997-004-01, :on 970318,safety Related 600 Volt Position Sensitive Seismic Qualification Was Not Seismically Qualified in All Positions.Caused by Personnel Error. Operating Procedures Modified
type: Subject
label: 05000348/LER-1997-004-01, :on 970318,safety Related 600 Volt Position Sensitive Seismic Qualification Was Not Seismically Qualified in All Positions.Caused by Personnel Error. Operating Procedures Modified
page: https://kanterella.com/05000348/LER-2D1997-2D004-2D01-2C_-3Aon_970318-2Csafety_Related_600_Volt_Position_Sensitive_Seismic_Qualification_Was_Not_Seismically_Qualified_in_All_Positions.Caused_by_Person…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000348/LER-1997-004-01, :on 970318,safety Related 600 Volt Position Sensitive Seismic Qualification Was Not Seismically Qualified in All Positions.Caused by Personnel Error. Operating Procedures Modified

GL 96-01 for Reactor Protective Sys Received.Caused by Inadequate Program to Ensure Surveillance Procedures Fully Implement TS Requirements.Procedures Revised
type: Subject
label: 05000336/LER-1997-008-02, :on 970310,repts Review Facility Compliance W/ GL 96-01 for Reactor Protective Sys Received.Caused by Inadequate Program to Ensure Surveillance Procedures Fully Implement TS Requirements.Procedures Revised
page: https://kanterella.com/05000336/LER-2D1997-2D008-2D02-2C_-3Aon_970310-2Crepts_Review_Facility_Compliance_W/_GL_96-2D01_for_Reactor_Protective_Sys_Received.Caused_by_Inadequate_Program_to_Ensure_Survei…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1997-008-02, :on 970310,repts Review Facility Compliance W/ GL 96-01 for Reactor Protective Sys Received.Caused by Inadequate Program to Ensure Surveillance Procedures Fully Implement TS Requirements.Procedures Revised

05000338/LER-1997-001-03, :on 970312,auxiliary Svc Water Pump Bolts Exceeded Design Basis Allowable Due to Personnel Error. Asw Pumps Were Declared Inoperable
type: Subject
page: https://kanterella.com/05000338/LER-2D1997-2D001-2D03-2C_-3Aon_970312-2Cauxiliary_Svc_Water_Pump_Bolts_Exceeded_Design_Basis_Allowable_Due_to_Personnel_Error._Asw_Pumps_Were_Declared_Inoperable
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000338/LER-1997-001-03, :on 970312,auxiliary Svc Water Pump Bolts Exceeded Design Basis Allowable Due to Personnel Error. Asw Pumps Were Declared Inoperable

LER-1997-007, :on 970311,potential for Svc Water Sys Water Hammer Following Loss of Normal Power Was Noted.Caused Because Original Design of Plant Did Not Identify Potential for Water Hammer.Check Valve Was Installed
type: Subject
label: 05000213/LER-1997-007, :on 970311,potential for Svc Water Sys Water Hammer Following Loss of Normal Power Was Noted.Caused Because Original Design of Plant Did Not Identify Potential for Water Hammer.Check Valve Was Installed
page: https://kanterella.com/05000213/LER-2D1997-2D007-2C_-3Aon_970311-2Cpotential_for_Svc_Water_Sys_Water_Hammer_Following_Loss_of_Normal_Power_Was_Noted.Caused_Because_Original_Design_of_Plant_Did_Not_Ide…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000213/LER-1997-007, :on 970311,potential for Svc Water Sys Water Hammer Following Loss of Normal Power Was Noted.Caused Because Original Design of Plant Did Not Identify Potential for Water Hammer.Check Valve Was Installed

LER-1997-001-02, :on 970314,reactor Vessel Level Dynamic Range Indication on a Train Declared Inoperable.Caused by Procedural Error.Revised Calibr Procedures,Normalized a & B Trains & Returned Train to Service
type: Subject
label: 05000339/LER-1997-001-02, :on 970314,reactor Vessel Level Dynamic Range Indication on a Train Declared Inoperable.Caused by Procedural Error.Revised Calibr Procedures,Normalized a & B Trains & Returned Train to Service
page: https://kanterella.com/05000339/LER-2D1997-2D001-2D02-2C_-3Aon_970314-2Creactor_Vessel_Level_Dynamic_Range_Indication_on_a_Train_Declared_Inoperable.Caused_by_Procedural_Error.Revised_Calibr_Procedure…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000339/LER-1997-001-02, :on 970314,reactor Vessel Level Dynamic Range Indication on a Train Declared Inoperable.Caused by Procedural Error.Revised Calibr Procedures,Normalized a & B Trains & Returned Train to Service

LER-1997-002-02, :on 970314,inadequate CREVS Surveillance Instruction Was Identified During GL 96-01 Review.Caused by Deficient Procedure.Rev to O-SI-4.2.G-2 Was Made & SI Section Was Successfully Completed
type: Subject
label: 05000259/LER-1997-002-02, :on 970314,inadequate CREVS Surveillance Instruction Was Identified During GL 96-01 Review.Caused by Deficient Procedure.Rev to O-SI-4.2.G-2 Was Made & SI Section Was Successfully Completed
page: https://kanterella.com/05000259/LER-2D1997-2D002-2D02-2C_-3Aon_970314-2Cinadequate_CREVS_Surveillance_Instruction_Was_Identified_During_GL_96-2D01_Review.Caused_by_Deficient_Procedure.Rev_to_O-2DSI-2D…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000259/LER-1997-002-02, :on 970314,inadequate CREVS Surveillance Instruction Was Identified During GL 96-01 Review.Caused by Deficient Procedure.Rev to O-SI-4.2.G-2 Was Made & SI Section Was Successfully Completed

4.9.13 Requirements
type: Subject
label: 05000364/LER-1997-002-01, :on 961030,inappropriate Interpretation of Penetration Room Filtration Sys Power Supply Requirement Occurred.Caused by Personnel Error.Revised Interpretation of TS 3/4.9.13 Requirements
page: https://kanterella.com/05000364/LER-2D1997-2D002-2D01-2C_-3Aon_961030-2Cinappropriate_Interpretation_of_Penetration_Room_Filtration_Sys_Power_Supply_Requirement_Occurred.Caused_by_Personnel_Error.Revi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000364/LER-1997-002-01, :on 961030,inappropriate Interpretation of Penetration Room Filtration Sys Power Supply Requirement Occurred.Caused by Personnel Error.Revised Interpretation of TS 3/4.9.13 Requirements

LER-1996-001, :on 961112,investigation of Seismic Qualification of Class 1E 4160 W Breakers Was Conducted Due to Incident Caused by Personnel Error.Racked Out Breakers Were Removed from Associated Modules
type: Subject
label: 05000289/LER-1996-001, :on 961112,investigation of Seismic Qualification of Class 1E 4160 W Breakers Was Conducted Due to Incident Caused by Personnel Error.Racked Out Breakers Were Removed from Associated Modules
page: https://kanterella.com/05000289/LER-2D1996-2D001-2C_-3Aon_961112-2Cinvestigation_of_Seismic_Qualification_of_Class_1E_4160_W_Breakers_Was_Conducted_Due_to_Incident_Caused_by_Personnel_Error.Racked_Out…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000289/LER-1996-001, :on 961112,investigation of Seismic Qualification of Class 1E 4160 W Breakers Was Conducted Due to Incident Caused by Personnel Error.Racked Out Breakers Were Removed from Associated Modules

3 Cooling Water Pump Damaged & Generator 2 Tripped When Brought Offline.Caused by Use of Conduit as Support When Climbing Ladder
type: Subject
label: 05000237/LER-1985-044-04, :on 851213,discovered Power Cable to Diesel Generator 2/3 Cooling Water Pump Damaged & Generator 2 Tripped When Brought Offline.Caused by Use of Conduit as Support When Climbing Ladder
page: https://kanterella.com/05000237/LER-2D1985-2D044-2D04-2C_-3Aon_851213-2Cdiscovered_Power_Cable_to_Diesel_Generator_2/3_Cooling_Water_Pump_Damaged_-26_Generator_2_Tripped_When_Brought_Offline.Caused_by…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000237/LER-1985-044-04, :on 851213,discovered Power Cable to Diesel Generator 2/3 Cooling Water Pump Damaged & Generator 2 Tripped When Brought Offline.Caused by Use of Conduit as Support When Climbing Ladder

LER-1997-003, :on 970220,identified RCS Pressure Isolation Valves Were Not Tested.Caused by Operator Error.Affected Valves Declared Inoperable & Verified to Be Closed & Deenergized & Procedures Revised
type: Subject
label: 05000334/LER-1997-003, :on 970220,identified RCS Pressure Isolation Valves Were Not Tested.Caused by Operator Error.Affected Valves Declared Inoperable & Verified to Be Closed & Deenergized & Procedures Revised
page: https://kanterella.com/05000334/LER-2D1997-2D003-2C_-3Aon_970220-2Cidentified_RCS_Pressure_Isolation_Valves_Were_Not_Tested.Caused_by_Operator_Error.Affected_Valves_Declared_Inoperable_-26_Verified_to…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000334/LER-1997-003, :on 970220,identified RCS Pressure Isolation Valves Were Not Tested.Caused by Operator Error.Affected Valves Declared Inoperable & Verified to Be Closed & Deenergized & Procedures Revised

Plant in Shutdown. Caused by Inadvertent Opening of 125-volt Dc Feeder Breaker. Breaker Reclosed.Electrical Lineup Established
type: Subject
label: 05000298/LER-1985-013, :on 851022,automatic Closure Emergency Transformer Power Supply Challenged W/Plant in Shutdown. Caused by Inadvertent Opening of 125-volt Dc Feeder Breaker. Breaker Reclosed.Electrical Lineup Established
page: https://kanterella.com/05000298/LER-2D1985-2D013-2C_-3Aon_851022-2Cautomatic_Closure_Emergency_Transformer_Power_Supply_Challenged_W/Plant_in_Shutdown._Caused_by_Inadvertent_Opening_of_125-2Dvolt_Dc_F…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000298/LER-1985-013, :on 851022,automatic Closure Emergency Transformer Power Supply Challenged W/Plant in Shutdown. Caused by Inadvertent Opening of 125-volt Dc Feeder Breaker. Breaker Reclosed.Electrical Lineup Established

LER-1997-012-01, :on 970214,discovered Seismic Deficiency in Gas Turbine Generator Digital Control Sys.Caused by Inadequate Interface Review During Installation of Digital Control Sys in 1987.Implemented Physical Mod
type: Subject
label: 05000245/LER-1997-012-01, :on 970214,discovered Seismic Deficiency in Gas Turbine Generator Digital Control Sys.Caused by Inadequate Interface Review During Installation of Digital Control Sys in 1987.Implemented Physical Mod
page: https://kanterella.com/05000245/LER-2D1997-2D012-2D01-2C_-3Aon_970214-2Cdiscovered_Seismic_Deficiency_in_Gas_Turbine_Generator_Digital_Control_Sys.Caused_by_Inadequate_Interface_Review_During_Installa…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000245/LER-1997-012-01, :on 970214,discovered Seismic Deficiency in Gas Turbine Generator Digital Control Sys.Caused by Inadequate Interface Review During Installation of Digital Control Sys in 1987.Implemented Physical Mod

LER-1997-002-01, :on 970215,Steam Generators 2A Eddy Current Insp Results Fell Into Category C-3.Caused by Stress Corrosion Cracking at tube-to-tube Support Plate.Sg Tubes Were Plugged in Four Unit 2 Steam Generators
type: Subject
label: 05000499/LER-1997-002-01, :on 970215,Steam Generators 2A Eddy Current Insp Results Fell Into Category C-3.Caused by Stress Corrosion Cracking at tube-to-tube Support Plate.Sg Tubes Were Plugged in Four Unit 2 Steam Generators
page: https://kanterella.com/05000499/LER-2D1997-2D002-2D01-2C_-3Aon_970215-2CSteam_Generators_2A_Eddy_Current_Insp_Results_Fell_Into_Category_C-2D3.Caused_by_Stress_Corrosion_Cracking_at_tube-2Dto-2Dtube_S…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000499/LER-1997-002-01, :on 970215,Steam Generators 2A Eddy Current Insp Results Fell Into Category C-3.Caused by Stress Corrosion Cracking at tube-to-tube Support Plate.Sg Tubes Were Plugged in Four Unit 2 Steam Generators

05000424/LER-1997-003, :on 970213,unlatched Doors on MCC Changed Seismic Qualifications.Caused by Failure to Maintain MCC Doors Secured.Mcc Doors Were Secured as Necessary
type: Subject
page: https://kanterella.com/05000424/LER-2D1997-2D003-2C_-3Aon_970213-2Cunlatched_Doors_on_MCC_Changed_Seismic_Qualifications.Caused_by_Failure_to_Maintain_MCC_Doors_Secured.Mcc_Doors_Were_Secured_as_Neces…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000424/LER-1997-003, :on 970213,unlatched Doors on MCC Changed Seismic Qualifications.Caused by Failure to Maintain MCC Doors Secured.Mcc Doors Were Secured as Necessary

05000259/LER-1997-001-03, :on 970203,potential Overpressurization Containment Penetration Pipe Occurred Due to Thermal Expansion of Entrapped Water Was Identified.Plant Procedures Will Be Revised
type: Subject
page: https://kanterella.com/05000259/LER-2D1997-2D001-2D03-2C_-3Aon_970203-2Cpotential_Overpressurization_Containment_Penetration_Pipe_Occurred_Due_to_Thermal_Expansion_of_Entrapped_Water_Was_Identified.Pl…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000259/LER-1997-001-03, :on 970203,potential Overpressurization Containment Penetration Pipe Occurred Due to Thermal Expansion of Entrapped Water Was Identified.Plant Procedures Will Be Revised

LER-1997-001-02, :on 970117,potential Overpressurization of Piping Between Closed Reactor Building Containment Isolation Valves Occurred Due to Inadequate Design Code Guidance. Results of Review Will Be Documented.Pages 2 & 3 Corrected
type: Subject
label: 05000289/LER-1997-001-02, :on 970117,potential Overpressurization of Piping Between Closed Reactor Building Containment Isolation Valves Occurred Due to Inadequate Design Code Guidance. Results of Review Will Be Documented.Pages 2 & 3 Corrected
page: https://kanterella.com/05000289/LER-2D1997-2D001-2D02-2C_-3Aon_970117-2Cpotential_Overpressurization_of_Piping_Between_Closed_Reactor_Building_Containment_Isolation_Valves_Occurred_Due_to_Inadequate_D…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000289/LER-1997-001-02, :on 970117,potential Overpressurization of Piping Between Closed Reactor Building Containment Isolation Valves Occurred Due to Inadequate Design Code Guidance. Results of Review Will Be Documented.Pages 2 & 3 Corrected

05000354/LER-1996-026-01, :on 961108,ESF Actuation/Single Rod Scram Occurred Due to Stuck Scram Solenoid Pilot.Sspv Replaced & CR 42-07 Returned to Svc
type: Subject
page: https://kanterella.com/05000354/LER-2D1996-2D026-2D01-2C_-3Aon_961108-2CESF_Actuation/Single_Rod_Scram_Occurred_Due_to_Stuck_Scram_Solenoid_Pilot.Sspv_Replaced_-26_CR_42-2D07_Returned_to_Svc
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000354/LER-1996-026-01, :on 961108,ESF Actuation/Single Rod Scram Occurred Due to Stuck Scram Solenoid Pilot.Sspv Replaced & CR 42-07 Returned to Svc

05000370/LER-1996-005-07, :on 961109,automatic Start of 2B EDG Due to 6 Kv Switchgear 2TD Bus Lockout,Resulting in 2ETB Blackout. Cause Unknown.Relay Replaced & Will Be Analyzed to Determine Cause
type: Subject
page: https://kanterella.com/05000370/LER-2D1996-2D005-2D07-2C_-3Aon_961109-2Cautomatic_Start_of_2B_EDG_Due_to_6_Kv_Switchgear_2TD_Bus_Lockout-2CResulting_in_2ETB_Blackout._Cause_Unknown.Relay_Replaced_-26_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000370/LER-1996-005-07, :on 961109,automatic Start of 2B EDG Due to 6 Kv Switchgear 2TD Bus Lockout,Resulting in 2ETB Blackout. Cause Unknown.Relay Replaced & Will Be Analyzed to Determine Cause

LER-1996-014, :on 961106,incorrect Circuit Breaker Setting Resulted in Inoperable Edg.Caused by Failure to Incorporate Design Info Into Appropriate Plant Single Line Electrical Drawing.Temporary Plant Mod Will Be Installed
type: Subject
label: 05000321/LER-1996-014, :on 961106,incorrect Circuit Breaker Setting Resulted in Inoperable Edg.Caused by Failure to Incorporate Design Info Into Appropriate Plant Single Line Electrical Drawing.Temporary Plant Mod Will Be Installed
page: https://kanterella.com/05000321/LER-2D1996-2D014-2C_-3Aon_961106-2Cincorrect_Circuit_Breaker_Setting_Resulted_in_Inoperable_Edg.Caused_by_Failure_to_Incorporate_Design_Info_Into_Appropriate_Plant_Sing…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000321/LER-1996-014, :on 961106,incorrect Circuit Breaker Setting Resulted in Inoperable Edg.Caused by Failure to Incorporate Design Info Into Appropriate Plant Single Line Electrical Drawing.Temporary Plant Mod Will Be Installed

Technical Inaccuracy.All Affected Procedures Were Changed & Instruments Calibrated within TS Limits
type: Subject
label: 05000369/LER-1996-004, :on 961010,incorrectly Calibrated Rcl Loss of Flow Reactor Trip Bistables Identified.Caused by Procedural/ Technical Inaccuracy.All Affected Procedures Were Changed & Instruments Calibrated within TS Limits
page: https://kanterella.com/05000369/LER-2D1996-2D004-2C_-3Aon_961010-2Cincorrectly_Calibrated_Rcl_Loss_of_Flow_Reactor_Trip_Bistables_Identified.Caused_by_Procedural/_Technical_Inaccuracy.All_Affected_Pro…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000369/LER-1996-004, :on 961010,incorrectly Calibrated Rcl Loss of Flow Reactor Trip Bistables Identified.Caused by Procedural/ Technical Inaccuracy.All Affected Procedures Were Changed & Instruments Calibrated within TS Limits

LER-1997-002, :on 970122,identified Potential Overpressurization of Penetrations During Accident Conditions.Plant Mods & Procedure Changes Being Developed to Prevent Overpressurization of Piping
type: Subject
label: 05000346/LER-1997-002, :on 970122,identified Potential Overpressurization of Penetrations During Accident Conditions.Plant Mods & Procedure Changes Being Developed to Prevent Overpressurization of Piping
page: https://kanterella.com/05000346/LER-2D1997-2D002-2C_-3Aon_970122-2Cidentified_Potential_Overpressurization_of_Penetrations_During_Accident_Conditions.Plant_Mods_-26_Procedure_Changes_Being_Developed_t…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000346/LER-1997-002, :on 970122,identified Potential Overpressurization of Penetrations During Accident Conditions.Plant Mods & Procedure Changes Being Developed to Prevent Overpressurization of Piping

LER-1997-001, :on 970122,nuclear Instrumentation Declared Inoperable & Incapable of Performing Safety Functions.Caused by Small Shift in Degraded Bottom Linear Amplifier.Power Range Bottom Linear Amplifier Replaced
type: Subject
label: 05000346/LER-1997-001, :on 970122,nuclear Instrumentation Declared Inoperable & Incapable of Performing Safety Functions.Caused by Small Shift in Degraded Bottom Linear Amplifier.Power Range Bottom Linear Amplifier Replaced
page: https://kanterella.com/05000346/LER-2D1997-2D001-2C_-3Aon_970122-2Cnuclear_Instrumentation_Declared_Inoperable_-26_Incapable_of_Performing_Safety_Functions.Caused_by_Small_Shift_in_Degraded_Bottom_Lin…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000346/LER-1997-001, :on 970122,nuclear Instrumentation Declared Inoperable & Incapable of Performing Safety Functions.Caused by Small Shift in Degraded Bottom Linear Amplifier.Power Range Bottom Linear Amplifier Replaced

05000321/LER-1997-001-01, :on 970129,pressure Boundary Leakage Results in Condition Prohibited by Tss.Cause of Event Cannot Be Determined Conclusively.Maint Personnel Repaired Line.W/
type: Subject
page: https://kanterella.com/05000321/LER-2D1997-2D001-2D01-2C_-3Aon_970129-2Cpressure_Boundary_Leakage_Results_in_Condition_Prohibited_by_Tss.Cause_of_Event_Cannot_Be_Determined_Conclusively.Maint_Personne…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000321/LER-1997-001-01, :on 970129,pressure Boundary Leakage Results in Condition Prohibited by Tss.Cause of Event Cannot Be Determined Conclusively.Maint Personnel Repaired Line.W/

LER-1996-007-01, :on 961018,reactor Trip Occurred Due to Loss of Reactor Coolant Pump.Caused by Loss of Electrical Bus 2A3. Meter & Relay Technicians (Utility non-licensed) Tested All Relays & Relays Tested Satisfactorily
type: Subject
label: 05000446/LER-1996-007-01, :on 961018,reactor Trip Occurred Due to Loss of Reactor Coolant Pump.Caused by Loss of Electrical Bus 2A3. Meter & Relay Technicians (Utility non-licensed) Tested All Relays & Relays Tested Satisfactorily
page: https://kanterella.com/05000446/LER-2D1996-2D007-2D01-2C_-3Aon_961018-2Creactor_Trip_Occurred_Due_to_Loss_of_Reactor_Coolant_Pump.Caused_by_Loss_of_Electrical_Bus_2A3._Meter_-26_Relay_Technicians_-28U…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000446/LER-1996-007-01, :on 961018,reactor Trip Occurred Due to Loss of Reactor Coolant Pump.Caused by Loss of Electrical Bus 2A3. Meter & Relay Technicians (Utility non-licensed) Tested All Relays & Relays Tested Satisfactorily

05000382/LER-1996-009, :on 960726,valves Failed to Pass Leakage Test. Caused by Excessive Roughness in Valve Body Core.Replaced Valves CVR-402A & CVR-402B & Retested Both Valves Successfully
type: Subject
page: https://kanterella.com/05000382/LER-2D1996-2D009-2C_-3Aon_960726-2Cvalves_Failed_to_Pass_Leakage_Test._Caused_by_Excessive_Roughness_in_Valve_Body_Core.Replaced_Valves_CVR-2D402A_-26_CVR-2D402B_-26_Re…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1996-009, :on 960726,valves Failed to Pass Leakage Test. Caused by Excessive Roughness in Valve Body Core.Replaced Valves CVR-402A & CVR-402B & Retested Both Valves Successfully

LER-1997-001, :on 970113,nuclear Instrumentation Sys Inaccuracies Were Below 50- Power.Caused by Personnel Error. Unit Operating Procedures Have Been Modified to Specify That Nis Must Be Adjusted
type: Subject
label: 05000364/LER-1997-001, :on 970113,nuclear Instrumentation Sys Inaccuracies Were Below 50% Power.Caused by Personnel Error. Unit Operating Procedures Have Been Modified to Specify That Nis Must Be Adjusted
page: https://kanterella.com/05000364/LER-2D1997-2D001-2C_-3Aon_970113-2Cnuclear_Instrumentation_Sys_Inaccuracies_Were_Below_50-_Power.Caused_by_Personnel_Error._Unit_Operating_Procedures_Have_Been_Modified…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000364/LER-1997-001, :on 970113,nuclear Instrumentation Sys Inaccuracies Were Below 50% Power.Caused by Personnel Error. Unit Operating Procedures Have Been Modified to Specify That Nis Must Be Adjusted

LER-1996-009-02, :on 961017,discovered Fire in Reactor Bldg. Caused by Cracked Weld in Oil Line on Reactor Coolant Pump Motor.Extinguished Fire,Replaced Damaged Insulation & Repaired Cracked Weld
type: Subject
label: 05000313/LER-1996-009-02, :on 961017,discovered Fire in Reactor Bldg. Caused by Cracked Weld in Oil Line on Reactor Coolant Pump Motor.Extinguished Fire,Replaced Damaged Insulation & Repaired Cracked Weld
page: https://kanterella.com/05000313/LER-2D1996-2D009-2D02-2C_-3Aon_961017-2Cdiscovered_Fire_in_Reactor_Bldg._Caused_by_Cracked_Weld_in_Oil_Line_on_Reactor_Coolant_Pump_Motor.Extinguished_Fire-2CReplaced_D…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000313/LER-1996-009-02, :on 961017,discovered Fire in Reactor Bldg. Caused by Cracked Weld in Oil Line on Reactor Coolant Pump Motor.Extinguished Fire,Replaced Damaged Insulation & Repaired Cracked Weld

LER-1996-022, :on 961122,operation Outside of 10CFR50 App R Design Basis Occurred.Caused by Design Error.Will Perform Top to Bottom Exam of post-fire Shutdown Analysis & Implement Appropriate Modifications
type: Subject
label: 05000302/LER-1996-022, :on 961122,operation Outside of 10CFR50 App R Design Basis Occurred.Caused by Design Error.Will Perform Top to Bottom Exam of post-fire Shutdown Analysis & Implement Appropriate Modifications
page: https://kanterella.com/05000302/LER-2D1996-2D022-2C_-3Aon_961122-2Coperation_Outside_of_10CFR50_App_R_Design_Basis_Occurred.Caused_by_Design_Error.Will_Perform_Top_to_Bottom_Exam_of_post-2Dfire_Shutdo…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000302/LER-1996-022, :on 961122,operation Outside of 10CFR50 App R Design Basis Occurred.Caused by Design Error.Will Perform Top to Bottom Exam of post-fire Shutdown Analysis & Implement Appropriate Modifications

LER-1985-041, :on 850705,essential Air Filtration Units for Control Room & ESF Pump Rooms Declared Inoperable Due to Improper Sampling Procedures.Caused by Tech Spec Requirements Not Being Met
type: Subject
label: 05000528/LER-1985-041, :on 850705,essential Air Filtration Units for Control Room & ESF Pump Rooms Declared Inoperable Due to Improper Sampling Procedures.Caused by Tech Spec Requirements Not Being Met
page: https://kanterella.com/05000528/LER-2D1985-2D041-2C_-3Aon_850705-2Cessential_Air_Filtration_Units_for_Control_Room_-26_ESF_Pump_Rooms_Declared_Inoperable_Due_to_Improper_Sampling_Procedures.Caused_by_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000528/LER-1985-041, :on 850705,essential Air Filtration Units for Control Room & ESF Pump Rooms Declared Inoperable Due to Improper Sampling Procedures.Caused by Tech Spec Requirements Not Being Met

LER-1996-008, :on 961017,two Pressurizer Safety Valves Were Found with Unsatisfactory Lift Setpoints.Caused by Setpoint Drift.Valves Were Returned to Operable Status Using Normal Rework for Components
type: Subject
label: 05000445/LER-1996-008, :on 961017,two Pressurizer Safety Valves Were Found with Unsatisfactory Lift Setpoints.Caused by Setpoint Drift.Valves Were Returned to Operable Status Using Normal Rework for Components
page: https://kanterella.com/05000445/LER-2D1996-2D008-2C_-3Aon_961017-2Ctwo_Pressurizer_Safety_Valves_Were_Found_with_Unsatisfactory_Lift_Setpoints.Caused_by_Setpoint_Drift.Valves_Were_Returned_to_Operable…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000445/LER-1996-008, :on 961017,two Pressurizer Safety Valves Were Found with Unsatisfactory Lift Setpoints.Caused by Setpoint Drift.Valves Were Returned to Operable Status Using Normal Rework for Components

05000425/LER-1996-006-02, :on 961014,reactor Trip Occurred Due to Main Feedwater Regulating Valve Closure.Mfrv Positioner Was Replaced & Valve Was Returned to Service
type: Subject
page: https://kanterella.com/05000425/LER-2D1996-2D006-2D02-2C_-3Aon_961014-2Creactor_Trip_Occurred_Due_to_Main_Feedwater_Regulating_Valve_Closure.Mfrv_Positioner_Was_Replaced_-26_Valve_Was_Returned_to_Serv…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000425/LER-1996-006-02, :on 961014,reactor Trip Occurred Due to Main Feedwater Regulating Valve Closure.Mfrv Positioner Was Replaced & Valve Was Returned to Service

05000301/LER-1997-001-01, :on 970107,containment Liner Clearance Was Not IAW Plant Design Basis.Caused by Void Between Containment Liner & Concrete Containment Structure.Inspected Containment
type: Subject
page: https://kanterella.com/05000301/LER-2D1997-2D001-2D01-2C_-3Aon_970107-2Ccontainment_Liner_Clearance_Was_Not_IAW_Plant_Design_Basis.Caused_by_Void_Between_Containment_Liner_-26_Concrete_Containment_Str…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000301/LER-1997-001-01, :on 970107,containment Liner Clearance Was Not IAW Plant Design Basis.Caused by Void Between Containment Liner & Concrete Containment Structure.Inspected Containment

LER-1997-002, :on 970109,potential to Overpressurize Piping Between Containment Isolation Valves Occurred.Caused by Original Design Not Providing Overpressure Protection for Piping.Review Completed
type: Subject
label: 05000266/LER-1997-002, :on 970109,potential to Overpressurize Piping Between Containment Isolation Valves Occurred.Caused by Original Design Not Providing Overpressure Protection for Piping.Review Completed
page: https://kanterella.com/05000266/LER-2D1997-2D002-2C_-3Aon_970109-2Cpotential_to_Overpressurize_Piping_Between_Containment_Isolation_Valves_Occurred.Caused_by_Original_Design_Not_Providing_Overpressure…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000266/LER-1997-002, :on 970109,potential to Overpressurize Piping Between Containment Isolation Valves Occurred.Caused by Original Design Not Providing Overpressure Protection for Piping.Review Completed

LER-1996-006, :on 961008,Kaowool Fire Barrier Sys on Six Unit 1 Raceways Did Not Comply with Program Requirements. Caused by Personnel Error.Hourly Fire Watches Established & Will Remain Until Sys in Compliance
type: Subject
label: 05000348/LER-1996-006, :on 961008,Kaowool Fire Barrier Sys on Six Unit 1 Raceways Did Not Comply with Program Requirements. Caused by Personnel Error.Hourly Fire Watches Established & Will Remain Until Sys in Compliance
page: https://kanterella.com/05000348/LER-2D1996-2D006-2C_-3Aon_961008-2CKaowool_Fire_Barrier_Sys_on_Six_Unit_1_Raceways_Did_Not_Comply_with_Program_Requirements._Caused_by_Personnel_Error.Hourly_Fire_Watch…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000348/LER-1996-006, :on 961008,Kaowool Fire Barrier Sys on Six Unit 1 Raceways Did Not Comply with Program Requirements. Caused by Personnel Error.Hourly Fire Watches Established & Will Remain Until Sys in Compliance

05000414/LER-1997-002, :on 970107,new Incore Fission Detector Was Installed in Unit 2 Reactor & 43 Days Had Elapsed Since Last Survey.Caused by Inadequate Procedural Guidance.Procedure Revised
type: Subject
page: https://kanterella.com/05000414/LER-2D1997-2D002-2C_-3Aon_970107-2Cnew_Incore_Fission_Detector_Was_Installed_in_Unit_2_Reactor_-26_43_Days_Had_Elapsed_Since_Last_Survey.Caused_by_Inadequate_Procedural…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000414/LER-1997-002, :on 970107,new Incore Fission Detector Was Installed in Unit 2 Reactor & 43 Days Had Elapsed Since Last Survey.Caused by Inadequate Procedural Guidance.Procedure Revised

LER-1985-020, :on 850726,operations Personnel Notified by Chemistry Group That Emergency Diesel Fuel Oil Storage Tank a Test Results Did Not Meet Tech Spec Criteria.Caused by Personnel Error & Procedural Inadequacy
type: Subject
label: 05000293/LER-1985-020, :on 850726,operations Personnel Notified by Chemistry Group That Emergency Diesel Fuel Oil Storage Tank a Test Results Did Not Meet Tech Spec Criteria.Caused by Personnel Error & Procedural Inadequacy
page: https://kanterella.com/05000293/LER-2D1985-2D020-2C_-3Aon_850726-2Coperations_Personnel_Notified_by_Chemistry_Group_That_Emergency_Diesel_Fuel_Oil_Storage_Tank_a_Test_Results_Did_Not_Meet_Tech_Spec_Cr…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1985-020, :on 850726,operations Personnel Notified by Chemistry Group That Emergency Diesel Fuel Oil Storage Tank a Test Results Did Not Meet Tech Spec Criteria.Caused by Personnel Error & Procedural Inadequacy

LER-1997-001, :on 970108,safety Injection Delay Times Exceeded Design Basis Values.Caused by Degraded Voltage Conditions.Licensee Engineers Will Prepare FSAR Change Requests to Reflect LBLOCA Evaluation
type: Subject
label: 05000266/LER-1997-001, :on 970108,safety Injection Delay Times Exceeded Design Basis Values.Caused by Degraded Voltage Conditions.Licensee Engineers Will Prepare FSAR Change Requests to Reflect LBLOCA Evaluation
page: https://kanterella.com/05000266/LER-2D1997-2D001-2C_-3Aon_970108-2Csafety_Injection_Delay_Times_Exceeded_Design_Basis_Values.Caused_by_Degraded_Voltage_Conditions.Licensee_Engineers_Will_Prepare_FSAR_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000266/LER-1997-001, :on 970108,safety Injection Delay Times Exceeded Design Basis Values.Caused by Degraded Voltage Conditions.Licensee Engineers Will Prepare FSAR Change Requests to Reflect LBLOCA Evaluation

LER-1996-010, :on 961003,TS Required Composite Analysis Were Not Always Performed for Neutralizing Sump Discharges.Caused by Programmatic Deficiency.Interim Measure Will Be Incorporated Into Procedures 7.9.2. & 7.9.5
type: Subject
label: 05000293/LER-1996-010, :on 961003,TS Required Composite Analysis Were Not Always Performed for Neutralizing Sump Discharges.Caused by Programmatic Deficiency.Interim Measure Will Be Incorporated Into Procedures 7.9.2. & 7.9.5
page: https://kanterella.com/05000293/LER-2D1996-2D010-2C_-3Aon_961003-2CTS_Required_Composite_Analysis_Were_Not_Always_Performed_for_Neutralizing_Sump_Discharges.Caused_by_Programmatic_Deficiency.Interim_M…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1996-010, :on 961003,TS Required Composite Analysis Were Not Always Performed for Neutralizing Sump Discharges.Caused by Programmatic Deficiency.Interim Measure Will Be Incorporated Into Procedures 7.9.2. & 7.9.5

05000412/LER-1997-001, :on 970106,reactor Trip Occurred Due to Main Transformer Ground Protection Relay.Caused by Inadequate Design Implementation.Procedures 2OM-35.3C & 2OM-35.4L Revised
type: Subject
page: https://kanterella.com/05000412/LER-2D1997-2D001-2C_-3Aon_970106-2Creactor_Trip_Occurred_Due_to_Main_Transformer_Ground_Protection_Relay.Caused_by_Inadequate_Design_Implementation.Procedures_2OM-2D35.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000412/LER-1997-001, :on 970106,reactor Trip Occurred Due to Main Transformer Ground Protection Relay.Caused by Inadequate Design Implementation.Procedures 2OM-35.3C & 2OM-35.4L Revised

LER-1997-001, :on 970103,maint Found Nitrogen Supply Isolation Valves for Power Operated Relief Valve (PORV) 2SV-1 Closed.Caused by Poor Work Practices.Nitrogen Isolation Valves for 2SV-1 & 2SV-13 Opened
type: Subject
label: 05000414/LER-1997-001, :on 970103,maint Found Nitrogen Supply Isolation Valves for Power Operated Relief Valve (PORV) 2SV-1 Closed.Caused by Poor Work Practices.Nitrogen Isolation Valves for 2SV-1 & 2SV-13 Opened
page: https://kanterella.com/05000414/LER-2D1997-2D001-2C_-3Aon_970103-2Cmaint_Found_Nitrogen_Supply_Isolation_Valves_for_Power_Operated_Relief_Valve_-28PORV-29_2SV-2D1_Closed.Caused_by_Poor_Work_Practices.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000414/LER-1997-001, :on 970103,maint Found Nitrogen Supply Isolation Valves for Power Operated Relief Valve (PORV) 2SV-1 Closed.Caused by Poor Work Practices.Nitrogen Isolation Valves for 2SV-1 & 2SV-13 Opened

05000446/LER-1996-006, :on 960918,automatic Reactor Trip Occurred. Caused by Lightning Strike.Design Change Was Implemented to Eliminate Ground
type: Subject
page: https://kanterella.com/05000446/LER-2D1996-2D006-2C_-3Aon_960918-2Cautomatic_Reactor_Trip_Occurred._Caused_by_Lightning_Strike.Design_Change_Was_Implemented_to_Eliminate_Ground
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000446/LER-1996-006, :on 960918,automatic Reactor Trip Occurred. Caused by Lightning Strike.Design Change Was Implemented to Eliminate Ground

LER-1996-029-01, :on 961228,unplanned Reactor Core Isolation Cooling Sys Inoperability Occurred Due to Stuck Governor Valve.Valve Stem Was Replaced & RCIC Sys Was Returned to Service on 961230
type: Subject
label: 05000354/LER-1996-029-01, :on 961228,unplanned Reactor Core Isolation Cooling Sys Inoperability Occurred Due to Stuck Governor Valve.Valve Stem Was Replaced & RCIC Sys Was Returned to Service on 961230
page: https://kanterella.com/05000354/LER-2D1996-2D029-2D01-2C_-3Aon_961228-2Cunplanned_Reactor_Core_Isolation_Cooling_Sys_Inoperability_Occurred_Due_to_Stuck_Governor_Valve.Valve_Stem_Was_Replaced_-26_RCIC…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000354/LER-1996-029-01, :on 961228,unplanned Reactor Core Isolation Cooling Sys Inoperability Occurred Due to Stuck Governor Valve.Valve Stem Was Replaced & RCIC Sys Was Returned to Service on 961230

LER-1996-013, :on 961130,failure to Perform Gaseous Waste Disposal Sys Oxygen Testing as Required by TSs Discovered. Caused by Operator Error & Inadequate Operating Logs. Oxygen Analyzers Were Restored
type: Subject
label: 05000334/LER-1996-013, :on 961130,failure to Perform Gaseous Waste Disposal Sys Oxygen Testing as Required by TSs Discovered. Caused by Operator Error & Inadequate Operating Logs. Oxygen Analyzers Were Restored
page: https://kanterella.com/05000334/LER-2D1996-2D013-2C_-3Aon_961130-2Cfailure_to_Perform_Gaseous_Waste_Disposal_Sys_Oxygen_Testing_as_Required_by_TSs_Discovered._Caused_by_Operator_Error_-26_Inadequate_O…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000334/LER-1996-013, :on 961130,failure to Perform Gaseous Waste Disposal Sys Oxygen Testing as Required by TSs Discovered. Caused by Operator Error & Inadequate Operating Logs. Oxygen Analyzers Were Restored

05000416/LER-1985-028, :on 850717,diesel Generator Tripped.Plant Shutdown Initiated.Caused by Failed Generator Bearing. Bearing Replaced.Generator Returned to Svc Prior to Required Shutdown
type: Subject
page: https://kanterella.com/05000416/LER-2D1985-2D028-2C_-3Aon_850717-2Cdiesel_Generator_Tripped.Plant_Shutdown_Initiated.Caused_by_Failed_Generator_Bearing._Bearing_Replaced.Generator_Returned_to_Svc_Prio…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000416/LER-1985-028, :on 850717,diesel Generator Tripped.Plant Shutdown Initiated.Caused by Failed Generator Bearing. Bearing Replaced.Generator Returned to Svc Prior to Required Shutdown

LER-1996-004, :on 960409,low Voltage Power Containment Electrical Penetrations with Degraded Electrical Protection Occurred.Caused by Unawareness of Coordination Requirements. Circuits Breakers Replaced
type: Subject
label: 05000293/LER-1996-004, :on 960409,low Voltage Power Containment Electrical Penetrations with Degraded Electrical Protection Occurred.Caused by Unawareness of Coordination Requirements. Circuits Breakers Replaced
page: https://kanterella.com/05000293/LER-2D1996-2D004-2C_-3Aon_960409-2Clow_Voltage_Power_Containment_Electrical_Penetrations_with_Degraded_Electrical_Protection_Occurred.Caused_by_Unawareness_of_Coordinat…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1996-004, :on 960409,low Voltage Power Containment Electrical Penetrations with Degraded Electrical Protection Occurred.Caused by Unawareness of Coordination Requirements. Circuits Breakers Replaced

LER-1996-008, :on 961223,missed TS 4.8.2.1.a Surveillance of 125-VDC Batteries Due to Cognitive Personnel Error. Individual Involved Has Been Counseled on Importance of Attention to Detail & Self Checking
type: Subject
label: 05000483/LER-1996-008, :on 961223,missed TS 4.8.2.1.a Surveillance of 125-VDC Batteries Due to Cognitive Personnel Error. Individual Involved Has Been Counseled on Importance of Attention to Detail & Self Checking
page: https://kanterella.com/05000483/LER-2D1996-2D008-2C_-3Aon_961223-2Cmissed_TS_4.8.2.1.a_Surveillance_of_125-2DVDC_Batteries_Due_to_Cognitive_Personnel_Error._Individual_Involved_Has_Been_Counseled_on_I…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000483/LER-1996-008, :on 961223,missed TS 4.8.2.1.a Surveillance of 125-VDC Batteries Due to Cognitive Personnel Error. Individual Involved Has Been Counseled on Importance of Attention to Detail & Self Checking

LER-1985-028, :on 850627,DNBR & Local Power Density Trip Generated,Resulting in Actuation of Reactor Protective Sys. Caused by Control Element Assembly Position Deviation.Ler to Be Emphasized During Operator Training
type: Subject
label: 05000382/LER-1985-028, :on 850627,DNBR & Local Power Density Trip Generated,Resulting in Actuation of Reactor Protective Sys. Caused by Control Element Assembly Position Deviation.Ler to Be Emphasized During Operator Training
page: https://kanterella.com/05000382/LER-2D1985-2D028-2C_-3Aon_850627-2CDNBR_-26_Local_Power_Density_Trip_Generated-2CResulting_in_Actuation_of_Reactor_Protective_Sys._Caused_by_Control_Element_Assembly_Po…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1985-028, :on 850627,DNBR & Local Power Density Trip Generated,Resulting in Actuation of Reactor Protective Sys. Caused by Control Element Assembly Position Deviation.Ler to Be Emphasized During Operator Training

LER-1996-038-02, :on 961202,inadequate Surveillance Procedure Used to Verify EDG Operability.Caused by Failure to Properly Incorporate TS SRs During Recent Revs of Monthly EDG Tests. Changed EDG Surveillance Procedures
type: Subject
label: 05000336/LER-1996-038-02, :on 961202,inadequate Surveillance Procedure Used to Verify EDG Operability.Caused by Failure to Properly Incorporate TS SRs During Recent Revs of Monthly EDG Tests. Changed EDG Surveillance Procedures
page: https://kanterella.com/05000336/LER-2D1996-2D038-2D02-2C_-3Aon_961202-2Cinadequate_Surveillance_Procedure_Used_to_Verify_EDG_Operability.Caused_by_Failure_to_Properly_Incorporate_TS_SRs_During_Recent_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1996-038-02, :on 961202,inadequate Surveillance Procedure Used to Verify EDG Operability.Caused by Failure to Properly Incorporate TS SRs During Recent Revs of Monthly EDG Tests. Changed EDG Surveillance Procedures

LER-1996-019, :on 961127,spent Fuel Storage Racks Outside Design Basis Due to Boraflex Degradation.Boric Acid Has Been Placed in Immediate Vicinity of Spent Fuel Pool in Event Manual Addition Is Required
type: Subject
label: 05000282/LER-1996-019, :on 961127,spent Fuel Storage Racks Outside Design Basis Due to Boraflex Degradation.Boric Acid Has Been Placed in Immediate Vicinity of Spent Fuel Pool in Event Manual Addition Is Required
page: https://kanterella.com/05000282/LER-2D1996-2D019-2C_-3Aon_961127-2Cspent_Fuel_Storage_Racks_Outside_Design_Basis_Due_to_Boraflex_Degradation.Boric_Acid_Has_Been_Placed_in_Immediate_Vicinity_of_Spent_F…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000282/LER-1996-019, :on 961127,spent Fuel Storage Racks Outside Design Basis Due to Boraflex Degradation.Boric Acid Has Been Placed in Immediate Vicinity of Spent Fuel Pool in Event Manual Addition Is Required

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 306A
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

LER-1996-019, :on 961120,inadequate Surveillance Procedures Were Noted Due to Misinterpretation of TS Bases Results in Source Range Monitor Reactor Period Display Not Verified. Procedures CPS 9031.13 Will Be Revised
type: Subject
label: 05000461/LER-1996-019, :on 961120,inadequate Surveillance Procedures Were Noted Due to Misinterpretation of TS Bases Results in Source Range Monitor Reactor Period Display Not Verified. Procedures CPS 9031.13 Will Be Revised
page: https://kanterella.com/05000461/LER-2D1996-2D019-2C_-3Aon_961120-2Cinadequate_Surveillance_Procedures_Were_Noted_Due_to_Misinterpretation_of_TS_Bases_Results_in_Source_Range_Monitor_Reactor_Period_Dis…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000461/LER-1996-019, :on 961120,inadequate Surveillance Procedures Were Noted Due to Misinterpretation of TS Bases Results in Source Range Monitor Reactor Period Display Not Verified. Procedures CPS 9031.13 Will Be Revised

LER-1996-010-01, :on 961116,manual Reactor Trip Occurred.Caused by Unexpected Feedwater Heater Isolation.Informed Personnel of Effects Changing Proportional Band on Operating Range of Associated Valve Controllers
type: Subject
label: 05000327/LER-1996-010-01, :on 961116,manual Reactor Trip Occurred.Caused by Unexpected Feedwater Heater Isolation.Informed Personnel of Effects Changing Proportional Band on Operating Range of Associated Valve Controllers
page: https://kanterella.com/05000327/LER-2D1996-2D010-2D01-2C_-3Aon_961116-2Cmanual_Reactor_Trip_Occurred.Caused_by_Unexpected_Feedwater_Heater_Isolation.Informed_Personnel_of_Effects_Changing_Proportional…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000327/LER-1996-010-01, :on 961116,manual Reactor Trip Occurred.Caused by Unexpected Feedwater Heater Isolation.Informed Personnel of Effects Changing Proportional Band on Operating Range of Associated Valve Controllers

LER-1996-007-01, :on 961015,CR Ventilation Sys Was Operated in Purge Mode to Ventilate Paint Fumes from Cr,Temporarily Rendering CR Emergency Bottled Air Pressurization Subsystem & Esf,Inoperable.Changed Planning Processes
type: Subject
label: 05000412/LER-1996-007-01, :on 961015,CR Ventilation Sys Was Operated in Purge Mode to Ventilate Paint Fumes from Cr,Temporarily Rendering CR Emergency Bottled Air Pressurization Subsystem & Esf,Inoperable.Changed Planning Processes
page: https://kanterella.com/05000412/LER-2D1996-2D007-2D01-2C_-3Aon_961015-2CCR_Ventilation_Sys_Was_Operated_in_Purge_Mode_to_Ventilate_Paint_Fumes_from_Cr-2CTemporarily_Rendering_CR_Emergency_Bottled_Air_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000412/LER-1996-007-01, :on 961015,CR Ventilation Sys Was Operated in Purge Mode to Ventilate Paint Fumes from Cr,Temporarily Rendering CR Emergency Bottled Air Pressurization Subsystem & Esf,Inoperable.Changed Planning Processes

Personnel
type: Subject
label: 05000413/LER-1985-043, :on 850622,manual Reactor Shutdown Initiated Following Automatic Trip of Main Feedwater Pump Turbine 1B Due to Loss of Condenser Vacuum.Caused by Personnel Error. Incident Discussed W/Personnel
page: https://kanterella.com/05000413/LER-2D1985-2D043-2C_-3Aon_850622-2Cmanual_Reactor_Shutdown_Initiated_Following_Automatic_Trip_of_Main_Feedwater_Pump_Turbine_1B_Due_to_Loss_of_Condenser_Vacuum.Caused_b…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000413/LER-1985-043, :on 850622,manual Reactor Shutdown Initiated Following Automatic Trip of Main Feedwater Pump Turbine 1B Due to Loss of Condenser Vacuum.Caused by Personnel Error. Incident Discussed W/Personnel

LER-1996-037, :on 961114,leaking P-29C Gland Cooling Check Valve Was Observed.Caused by Sticking Check Valve in Gland Cooling Water Supply Line to Pump.Affected Check Valves Have Been Replaced
type: Subject
label: 05000309/LER-1996-037, :on 961114,leaking P-29C Gland Cooling Check Valve Was Observed.Caused by Sticking Check Valve in Gland Cooling Water Supply Line to Pump.Affected Check Valves Have Been Replaced
page: https://kanterella.com/05000309/LER-2D1996-2D037-2C_-3Aon_961114-2Cleaking_P-2D29C_Gland_Cooling_Check_Valve_Was_Observed.Caused_by_Sticking_Check_Valve_in_Gland_Cooling_Water_Supply_Line_to_Pump.Affe…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000309/LER-1996-037, :on 961114,leaking P-29C Gland Cooling Check Valve Was Observed.Caused by Sticking Check Valve in Gland Cooling Water Supply Line to Pump.Affected Check Valves Have Been Replaced

LER-1985-030, :on 850617,pressurizer Vapor Sample Outer Containment Isolation Valve Not Tested within Required Tech Spec Frequency Extension Limits.Caused by Personnel Error. Personnel Counseled
type: Subject
label: 05000483/LER-1985-030, :on 850617,pressurizer Vapor Sample Outer Containment Isolation Valve Not Tested within Required Tech Spec Frequency Extension Limits.Caused by Personnel Error. Personnel Counseled
page: https://kanterella.com/05000483/LER-2D1985-2D030-2C_-3Aon_850617-2Cpressurizer_Vapor_Sample_Outer_Containment_Isolation_Valve_Not_Tested_within_Required_Tech_Spec_Frequency_Extension_Limits.Caused_by_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000483/LER-1985-030, :on 850617,pressurizer Vapor Sample Outer Containment Isolation Valve Not Tested within Required Tech Spec Frequency Extension Limits.Caused by Personnel Error. Personnel Counseled

05000285/LER-1996-012, :on 961111,potential for Vaporizing Cooling Water in Containment Fan Cooling Units Occurred.Caused by Loop Coincident with Loca.Analyses Have Been Performed
type: Subject
page: https://kanterella.com/05000285/LER-2D1996-2D012-2C_-3Aon_961111-2Cpotential_for_Vaporizing_Cooling_Water_in_Containment_Fan_Cooling_Units_Occurred.Caused_by_Loop_Coincident_with_Loca.Analyses_Have_Be…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1996-012, :on 961111,potential for Vaporizing Cooling Water in Containment Fan Cooling Units Occurred.Caused by Loop Coincident with Loca.Analyses Have Been Performed

LER-1996-005-02, :on 960925,pressurizer Safety Valve Were Found to Be Open at Pressures Above Setpoints.Caused by Drift in Valves.Worn Bellows & Spindles Were Replaced,Psvs Were Readjusted Valves Were reinstalled.W961024 Ltr
type: Subject
label: 05000425/LER-1996-005-02, :on 960925,pressurizer Safety Valve Were Found to Be Open at Pressures Above Setpoints.Caused by Drift in Valves.Worn Bellows & Spindles Were Replaced,Psvs Were Readjusted Valves Were reinstalled.W961024 Ltr
page: https://kanterella.com/05000425/LER-2D1996-2D005-2D02-2C_-3Aon_960925-2Cpressurizer_Safety_Valve_Were_Found_to_Be_Open_at_Pressures_Above_Setpoints.Caused_by_Drift_in_Valves.Worn_Bellows_-26_Spindles_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000425/LER-1996-005-02, :on 960925,pressurizer Safety Valve Were Found to Be Open at Pressures Above Setpoints.Caused by Drift in Valves.Worn Bellows & Spindles Were Replaced,Psvs Were Readjusted Valves Were reinstalled.W961024 Ltr

LER-1985-022, :on 841129,during Fire Damper Insp,Two Reactor Enclosure Fire Penetrations Discovered Unsealed.Caused by Failure to Reinstall Seal After Const Activities.Fire Watch Established.Conduit Penetration Seals Replaced
type: Subject
label: 05000352/LER-1985-022, :on 841129,during Fire Damper Insp,Two Reactor Enclosure Fire Penetrations Discovered Unsealed.Caused by Failure to Reinstall Seal After Const Activities.Fire Watch Established.Conduit Penetration Seals Replaced
page: https://kanterella.com/05000352/LER-2D1985-2D022-2C_-3Aon_841129-2Cduring_Fire_Damper_Insp-2CTwo_Reactor_Enclosure_Fire_Penetrations_Discovered_Unsealed.Caused_by_Failure_to_Reinstall_Seal_After_Const…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000352/LER-1985-022, :on 841129,during Fire Damper Insp,Two Reactor Enclosure Fire Penetrations Discovered Unsealed.Caused by Failure to Reinstall Seal After Const Activities.Fire Watch Established.Conduit Penetration Seals Replaced

05000382/LER-1996-011-01, :on 960820,CR Normal Ventilation Isolation Valves (HVC-101 & HVC-102) Were Leaking.Caused by Debris Which Accumulated Inside Valves Disc Regions.Valves Were Closed
type: Subject
page: https://kanterella.com/05000382/LER-2D1996-2D011-2D01-2C_-3Aon_960820-2CCR_Normal_Ventilation_Isolation_Valves_-28HVC-2D101_-26_HVC-2D102-29_Were_Leaking.Caused_by_Debris_Which_Accumulated_Inside_Valv…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1996-011-01, :on 960820,CR Normal Ventilation Isolation Valves (HVC-101 & HVC-102) Were Leaking.Caused by Debris Which Accumulated Inside Valves Disc Regions.Valves Were Closed

05000423/LER-1996-035-01, :on 960920,motor Operated Valve Performance Found Outside Design Basis of Plant.Caused by Inadequate Design & Verification of Actuator.Mov Calculations Will Be Revised
type: Subject
page: https://kanterella.com/05000423/LER-2D1996-2D035-2D01-2C_-3Aon_960920-2Cmotor_Operated_Valve_Performance_Found_Outside_Design_Basis_of_Plant.Caused_by_Inadequate_Design_-26_Verification_of_Actuator.Mo…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000423/LER-1996-035-01, :on 960920,motor Operated Valve Performance Found Outside Design Basis of Plant.Caused by Inadequate Design & Verification of Actuator.Mov Calculations Will Be Revised

LER-1996-009-01, :on 960924,failure to Perform Required Actions within One Hour Following Discovery of Water in Fire Hydrant Barrel Noted.Water Was Pumped Out & Drain Port Was Repaired Under Work Orders 9602567 & 9602627
type: Subject
label: 05000263/LER-1996-009-01, :on 960924,failure to Perform Required Actions within One Hour Following Discovery of Water in Fire Hydrant Barrel Noted.Water Was Pumped Out & Drain Port Was Repaired Under Work Orders 9602567 & 9602627
page: https://kanterella.com/05000263/LER-2D1996-2D009-2D01-2C_-3Aon_960924-2Cfailure_to_Perform_Required_Actions_within_One_Hour_Following_Discovery_of_Water_in_Fire_Hydrant_Barrel_Noted.Water_Was_Pumped_O…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000263/LER-1996-009-01, :on 960924,failure to Perform Required Actions within One Hour Following Discovery of Water in Fire Hydrant Barrel Noted.Water Was Pumped Out & Drain Port Was Repaired Under Work Orders 9602567 & 9602627

LER-1985-041, :on 850613,main Feedwater Pump Trip Resulted in Manual Reactor Trip.Caused by Pump Recirculation Valve Not Capable of Modulating Quickly During Flow Reduction.Design Deficiency Corrected
type: Subject
label: 05000413/LER-1985-041, :on 850613,main Feedwater Pump Trip Resulted in Manual Reactor Trip.Caused by Pump Recirculation Valve Not Capable of Modulating Quickly During Flow Reduction.Design Deficiency Corrected
page: https://kanterella.com/05000413/LER-2D1985-2D041-2C_-3Aon_850613-2Cmain_Feedwater_Pump_Trip_Resulted_in_Manual_Reactor_Trip.Caused_by_Pump_Recirculation_Valve_Not_Capable_of_Modulating_Quickly_During_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000413/LER-1985-041, :on 850613,main Feedwater Pump Trip Resulted in Manual Reactor Trip.Caused by Pump Recirculation Valve Not Capable of Modulating Quickly During Flow Reduction.Design Deficiency Corrected

LER-1993-002, :on 930114,discovered That TS Required Monthly Surveillance Test on Steam Jet Air Ejector Not Completed within 38 Days.Caused by Inadequate Training.Surveillance Testing Control Procedure Will Be Revised
type: Subject
label: 05000271/LER-1993-002, :on 930114,discovered That TS Required Monthly Surveillance Test on Steam Jet Air Ejector Not Completed within 38 Days.Caused by Inadequate Training.Surveillance Testing Control Procedure Will Be Revised
page: https://kanterella.com/05000271/LER-2D1993-2D002-2C_-3Aon_930114-2Cdiscovered_That_TS_Required_Monthly_Surveillance_Test_on_Steam_Jet_Air_Ejector_Not_Completed_within_38_Days.Caused_by_Inadequate_Trai…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000271/LER-1993-002, :on 930114,discovered That TS Required Monthly Surveillance Test on Steam Jet Air Ejector Not Completed within 38 Days.Caused by Inadequate Training.Surveillance Testing Control Procedure Will Be Revised

Procedural Deficiency.Required Surveillance Implemented
type: Subject
label: 05000369/LER-1985-012-01, :from 850214-0425,fire Doors Normally Locked Closed Were Unlocked & Not Verified Closed Daily Nor Was Fire Watch Posted.Caused by Administrative/Procedural Deficiency.Required Surveillance Implemented
page: https://kanterella.com/05000369/LER-2D1985-2D012-2D01-2C_-3Afrom_850214-2D0425-2Cfire_Doors_Normally_Locked_Closed_Were_Unlocked_-26_Not_Verified_Closed_Daily_Nor_Was_Fire_Watch_Posted.Caused_by_Admin…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000369/LER-1985-012-01, :from 850214-0425,fire Doors Normally Locked Closed Were Unlocked & Not Verified Closed Daily Nor Was Fire Watch Posted.Caused by Administrative/Procedural Deficiency.Required Surveillance Implemented

LER-1992-010-01, :on 921019,while Restoring Motor Operated valves,WR-P-1A auto-started & Immediately Shutdown.Caused by Low Sys Pressure.Maint Work Request Initiated to Check Transmitter Calibr
type: Subject
label: 05000334/LER-1992-010-01, :on 921019,while Restoring Motor Operated valves,WR-P-1A auto-started & Immediately Shutdown.Caused by Low Sys Pressure.Maint Work Request Initiated to Check Transmitter Calibr
page: https://kanterella.com/05000334/LER-2D1992-2D010-2D01-2C_-3Aon_921019-2Cwhile_Restoring_Motor_Operated_valves-2CWR-2DP-2D1A_auto-2Dstarted_-26_Immediately_Shutdown.Caused_by_Low_Sys_Pressure.Maint_Wor…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000334/LER-1992-010-01, :on 921019,while Restoring Motor Operated valves,WR-P-1A auto-started & Immediately Shutdown.Caused by Low Sys Pressure.Maint Work Request Initiated to Check Transmitter Calibr

LER-1985-016-01, :on 850508,discovered That Temp Compensation Chart Not Incorporated in Hydrogen Analyzer Operation Emergency Procedure.Caused by Procedural Deficiency.Temp Compensation Charts Incorporated in Procedure
type: Subject
label: 05000369/LER-1985-016-01, :on 850508,discovered That Temp Compensation Chart Not Incorporated in Hydrogen Analyzer Operation Emergency Procedure.Caused by Procedural Deficiency.Temp Compensation Charts Incorporated in Procedure
page: https://kanterella.com/05000369/LER-2D1985-2D016-2D01-2C_-3Aon_850508-2Cdiscovered_That_Temp_Compensation_Chart_Not_Incorporated_in_Hydrogen_Analyzer_Operation_Emergency_Procedure.Caused_by_Procedural…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000369/LER-1985-016-01, :on 850508,discovered That Temp Compensation Chart Not Incorporated in Hydrogen Analyzer Operation Emergency Procedure.Caused by Procedural Deficiency.Temp Compensation Charts Incorporated in Procedure

LER-1992-018, :on 921026,reactor Tripped Due to Turbine Trip. Caused by hi-hi Feedwater Level in SG 3 & Failure in automatic-manual Switching Relay.Unit Stabilized in Hot Standby & Relays Replaced
type: Subject
label: 05000327/LER-1992-018, :on 921026,reactor Tripped Due to Turbine Trip. Caused by hi-hi Feedwater Level in SG 3 & Failure in automatic-manual Switching Relay.Unit Stabilized in Hot Standby & Relays Replaced
page: https://kanterella.com/05000327/LER-2D1992-2D018-2C_-3Aon_921026-2Creactor_Tripped_Due_to_Turbine_Trip._Caused_by_hi-2Dhi_Feedwater_Level_in_SG_3_-26_Failure_in_automatic-2Dmanual_Switching_Relay.Unit…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000327/LER-1992-018, :on 921026,reactor Tripped Due to Turbine Trip. Caused by hi-hi Feedwater Level in SG 3 & Failure in automatic-manual Switching Relay.Unit Stabilized in Hot Standby & Relays Replaced

LER-1992-035, :on 921221,power Operated Relief Valve & Block Valve Protection Indicator Alarms Channel Functional Tests Not Performed Due to Personnel Error.Surveillance Requirements Added to Procedures
type: Subject
label: 05000344/LER-1992-035, :on 921221,power Operated Relief Valve & Block Valve Protection Indicator Alarms Channel Functional Tests Not Performed Due to Personnel Error.Surveillance Requirements Added to Procedures
page: https://kanterella.com/05000344/LER-2D1992-2D035-2C_-3Aon_921221-2Cpower_Operated_Relief_Valve_-26_Block_Valve_Protection_Indicator_Alarms_Channel_Functional_Tests_Not_Performed_Due_to_Personnel_Error…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000344/LER-1992-035, :on 921221,power Operated Relief Valve & Block Valve Protection Indicator Alarms Channel Functional Tests Not Performed Due to Personnel Error.Surveillance Requirements Added to Procedures

LER-1996-010-01, :on 960813,load Side Conductors Installed on EDG 1 Normal DC Control Power Breaker 8 Were Improperly Secured.Cause Not Known.Edg 1 Normal DC Control Power 8 Load Side Conductors Were Properly Terminated
type: Subject
label: 05000325/LER-1996-010-01, :on 960813,load Side Conductors Installed on EDG 1 Normal DC Control Power Breaker 8 Were Improperly Secured.Cause Not Known.Edg 1 Normal DC Control Power 8 Load Side Conductors Were Properly Terminated
page: https://kanterella.com/05000325/LER-2D1996-2D010-2D01-2C_-3Aon_960813-2Cload_Side_Conductors_Installed_on_EDG_1_Normal_DC_Control_Power_Breaker_8_Were_Improperly_Secured.Cause_Not_Known.Edg_1_Normal_D…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000325/LER-1996-010-01, :on 960813,load Side Conductors Installed on EDG 1 Normal DC Control Power Breaker 8 Were Improperly Secured.Cause Not Known.Edg 1 Normal DC Control Power 8 Load Side Conductors Were Properly Terminated

LER-1996-002-05, :on 960822,discovered Failure to Properly Identify Steam Generator Tube May Have Exceeded Tech Spec Plugging Criteria.Caused by Misjudgement by Two Independent Analysts.Evaluation Performed
type: Subject
label: 05000328/LER-1996-002-05, :on 960822,discovered Failure to Properly Identify Steam Generator Tube May Have Exceeded Tech Spec Plugging Criteria.Caused by Misjudgement by Two Independent Analysts.Evaluation Performed
page: https://kanterella.com/05000328/LER-2D1996-2D002-2D05-2C_-3Aon_960822-2Cdiscovered_Failure_to_Properly_Identify_Steam_Generator_Tube_May_Have_Exceeded_Tech_Spec_Plugging_Criteria.Caused_by_Misjudgemen…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000328/LER-1996-002-05, :on 960822,discovered Failure to Properly Identify Steam Generator Tube May Have Exceeded Tech Spec Plugging Criteria.Caused by Misjudgement by Two Independent Analysts.Evaluation Performed

LER-1985-006-01, :on 850426,unit Tripped from 100- Power When 120-volt Ac Vital Bus 2-I Inadvertently Deenergized.Caused by Misidentification of Power Supply Cabinet & Subsequent Opening of Power Supply Breaker to Inverter
type: Subject
label: 05000339/LER-1985-006-01, :on 850426,unit Tripped from 100% Power When 120-volt Ac Vital Bus 2-I Inadvertently Deenergized.Caused by Misidentification of Power Supply Cabinet & Subsequent Opening of Power Supply Breaker to Inverter
page: https://kanterella.com/05000339/LER-2D1985-2D006-2D01-2C_-3Aon_850426-2Cunit_Tripped_from_100-_Power_When_120-2Dvolt_Ac_Vital_Bus_2-2DI_Inadvertently_Deenergized.Caused_by_Misidentification_of_Power_S…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000339/LER-1985-006-01, :on 850426,unit Tripped from 100% Power When 120-volt Ac Vital Bus 2-I Inadvertently Deenergized.Caused by Misidentification of Power Supply Cabinet & Subsequent Opening of Power Supply Breaker to Inverter

05000423/LER-1996-002-02, :on 960310,inadequate Surveillance for Determining Shutdown Margin When Unisolating Rcl Identified. Caused by Inadequate Procedure.Procedures Revised
type: Subject
page: https://kanterella.com/05000423/LER-2D1996-2D002-2D02-2C_-3Aon_960310-2Cinadequate_Surveillance_for_Determining_Shutdown_Margin_When_Unisolating_Rcl_Identified._Caused_by_Inadequate_Procedure.Procedur…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000423/LER-1996-002-02, :on 960310,inadequate Surveillance for Determining Shutdown Margin When Unisolating Rcl Identified. Caused by Inadequate Procedure.Procedures Revised

05000423/LER-1996-003-01, :on 960312,temporary I-Beams Located Overhead of Recirculation Spray Sys HXs Discovered.Caused by Inadequate Work Control.Work Control Procedures Revised
type: Subject
page: https://kanterella.com/05000423/LER-2D1996-2D003-2D01-2C_-3Aon_960312-2Ctemporary_I-2DBeams_Located_Overhead_of_Recirculation_Spray_Sys_HXs_Discovered.Caused_by_Inadequate_Work_Control.Work_Control_Pr…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000423/LER-1996-003-01, :on 960312,temporary I-Beams Located Overhead of Recirculation Spray Sys HXs Discovered.Caused by Inadequate Work Control.Work Control Procedures Revised

05000413/LER-1996-003-06, :on 960802,TS 3.0.3 Required Shutdown Initiated,Due to Ventilation Sys Motor Failures.Unit 2 Was Shutdown to MOD 5 Per Requirements of TS 3.0.3.Damaged Motors Were Replaced
type: Subject
page: https://kanterella.com/05000413/LER-2D1996-2D003-2D06-2C_-3Aon_960802-2CTS_3.0.3_Required_Shutdown_Initiated-2CDue_to_Ventilation_Sys_Motor_Failures.Unit_2_Was_Shutdown_to_MOD_5_Per_Requirements_of_TS…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000413/LER-1996-003-06, :on 960802,TS 3.0.3 Required Shutdown Initiated,Due to Ventilation Sys Motor Failures.Unit 2 Was Shutdown to MOD 5 Per Requirements of TS 3.0.3.Damaged Motors Were Replaced

05000325/LER-1996-007-01, :on 960509,high Pressure Coolant Injection Declared Inoperable.Caused by Degradation of Valve Stem Packing.Valve 1-E41-F001 Repaired & Valve Packing Replaced
type: Subject
page: https://kanterella.com/05000325/LER-2D1996-2D007-2D01-2C_-3Aon_960509-2Chigh_Pressure_Coolant_Injection_Declared_Inoperable.Caused_by_Degradation_of_Valve_Stem_Packing.Valve_1-2DE41-2DF001_Repaired_-2…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000325/LER-1996-007-01, :on 960509,high Pressure Coolant Injection Declared Inoperable.Caused by Degradation of Valve Stem Packing.Valve 1-E41-F001 Repaired & Valve Packing Replaced

LER-1996-005, :on 960419,automatic Scram Occurred Due to Turbine Vibration During Planned Power Reduction.Turbine Vibration Trip Setting That Initiates Trip of Turbine Due to High Vibration Changed
type: Subject
label: 05000293/LER-1996-005, :on 960419,automatic Scram Occurred Due to Turbine Vibration During Planned Power Reduction.Turbine Vibration Trip Setting That Initiates Trip of Turbine Due to High Vibration Changed
page: https://kanterella.com/05000293/LER-2D1996-2D005-2C_-3Aon_960419-2Cautomatic_Scram_Occurred_Due_to_Turbine_Vibration_During_Planned_Power_Reduction.Turbine_Vibration_Trip_Setting_That_Initiates_Trip_o…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1996-005, :on 960419,automatic Scram Occurred Due to Turbine Vibration During Planned Power Reduction.Turbine Vibration Trip Setting That Initiates Trip of Turbine Due to High Vibration Changed

05000293/LER-1996-002, :on 960205,loss of Valve Position Indication for MO-1301-16 Occurred.Caused by Loose Control Power Fuse in Breaker B1864.Investigation & Troubleshooting Plan Was Implemented
type: Subject
page: https://kanterella.com/05000293/LER-2D1996-2D002-2C_-3Aon_960205-2Closs_of_Valve_Position_Indication_for_MO-2D1301-2D16_Occurred.Caused_by_Loose_Control_Power_Fuse_in_Breaker_B1864.Investigation_-26_T…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1996-002, :on 960205,loss of Valve Position Indication for MO-1301-16 Occurred.Caused by Loose Control Power Fuse in Breaker B1864.Investigation & Troubleshooting Plan Was Implemented

05000336/LER-1996-021-01, :on 960227,snubber Failure in Pressurizer Spray Line Occurred.Caused by Corrosion.Replaced Snubber Serial 12883 W/Identical Model PSA-1 Snubber
type: Subject
page: https://kanterella.com/05000336/LER-2D1996-2D021-2D01-2C_-3Aon_960227-2Csnubber_Failure_in_Pressurizer_Spray_Line_Occurred.Caused_by_Corrosion.Replaced_Snubber_Serial_12883_W/Identical_Model_PSA-2D1_S…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1996-021-01, :on 960227,snubber Failure in Pressurizer Spray Line Occurred.Caused by Corrosion.Replaced Snubber Serial 12883 W/Identical Model PSA-1 Snubber

05000382/LER-1996-009-01, :on 960725,failure of Containment Vacuum Relief Valves CVR-402A & CVR-402B Occurred.Caused by Excessive Roughness in Valve Body Bore.Valves Replaced & Retested
type: Subject
page: https://kanterella.com/05000382/LER-2D1996-2D009-2D01-2C_-3Aon_960725-2Cfailure_of_Containment_Vacuum_Relief_Valves_CVR-2D402A_-26_CVR-2D402B_Occurred.Caused_by_Excessive_Roughness_in_Valve_Body_Bore.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1996-009-01, :on 960725,failure of Containment Vacuum Relief Valves CVR-402A & CVR-402B Occurred.Caused by Excessive Roughness in Valve Body Bore.Valves Replaced & Retested

05000445/LER-1996-005, :on 960310,entry Into TS 3.0.3 Occurred Due to Cracked Weld in SI Sys Piping.Removed & Replaced Cracked Weldment W/New Weld
type: Subject
page: https://kanterella.com/05000445/LER-2D1996-2D005-2C_-3Aon_960310-2Centry_Into_TS_3.0.3_Occurred_Due_to_Cracked_Weld_in_SI_Sys_Piping.Removed_-26_Replaced_Cracked_Weldment_W/New_Weld
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000445/LER-1996-005, :on 960310,entry Into TS 3.0.3 Occurred Due to Cracked Weld in SI Sys Piping.Removed & Replaced Cracked Weldment W/New Weld

05000445/LER-1996-006, :on 960411,rod Control Malfunction Resulted in Manual Rt.Replaced Bank Overlap Counter Circuit Board
type: Subject
page: https://kanterella.com/05000445/LER-2D1996-2D006-2C_-3Aon_960411-2Crod_Control_Malfunction_Resulted_in_Manual_Rt.Replaced_Bank_Overlap_Counter_Circuit_Board
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000445/LER-1996-006, :on 960411,rod Control Malfunction Resulted in Manual Rt.Replaced Bank Overlap Counter Circuit Board

05000327/LER-1996-009-01, :on 960718,auxiliary Building Secondary Containment Boundary/Fire Barrier Not Maintained as Required by Design.Caused by Failure to Follow Design Control Process
type: Subject
page: https://kanterella.com/05000327/LER-2D1996-2D009-2D01-2C_-3Aon_960718-2Cauxiliary_Building_Secondary_Containment_Boundary/Fire_Barrier_Not_Maintained_as_Required_by_Design.Caused_by_Failure_to_Follow_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000327/LER-1996-009-01, :on 960718,auxiliary Building Secondary Containment Boundary/Fire Barrier Not Maintained as Required by Design.Caused by Failure to Follow Design Control Process

LER-1992-011, :on 920924,noted That CCW Sys Grab Sample Per TS Action Requirement Had Not Been Taken within Specified Periodicity,Due to Personnel Error.Processing of Permits Will Be Assigned Only to Plant Technicians
type: Subject
label: 05000382/LER-1992-011, :on 920924,noted That CCW Sys Grab Sample Per TS Action Requirement Had Not Been Taken within Specified Periodicity,Due to Personnel Error.Processing of Permits Will Be Assigned Only to Plant Technicians
page: https://kanterella.com/05000382/LER-2D1992-2D011-2C_-3Aon_920924-2Cnoted_That_CCW_Sys_Grab_Sample_Per_TS_Action_Requirement_Had_Not_Been_Taken_within_Specified_Periodicity-2CDue_to_Personnel_Error.Pro…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1992-011, :on 920924,noted That CCW Sys Grab Sample Per TS Action Requirement Had Not Been Taken within Specified Periodicity,Due to Personnel Error.Processing of Permits Will Be Assigned Only to Plant Technicians

LER-1985-015, :on 850312,Tech Spec Surveillance Requirement Not Completed within Required Interval.Caused by Personnel Error Involving Scheduling of Surveillance Test Procedure. Effective Scheduling Coordination Implemented
type: Subject
label: 05000528/LER-1985-015, :on 850312,Tech Spec Surveillance Requirement Not Completed within Required Interval.Caused by Personnel Error Involving Scheduling of Surveillance Test Procedure. Effective Scheduling Coordination Implemented
page: https://kanterella.com/05000528/LER-2D1985-2D015-2C_-3Aon_850312-2CTech_Spec_Surveillance_Requirement_Not_Completed_within_Required_Interval.Caused_by_Personnel_Error_Involving_Scheduling_of_Surveilla…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000528/LER-1985-015, :on 850312,Tech Spec Surveillance Requirement Not Completed within Required Interval.Caused by Personnel Error Involving Scheduling of Surveillance Test Procedure. Effective Scheduling Coordination Implemented

05000382/LER-1996-012-01, :on 951111,normally Locked Closed Valve Discovered 1.5 Turns Open.Caused by Equipment Failure. Closed & Repaired CS-118A to Ensure Ease of Operation.W/
type: Subject
page: https://kanterella.com/05000382/LER-2D1996-2D012-2D01-2C_-3Aon_951111-2Cnormally_Locked_Closed_Valve_Discovered_1.5_Turns_Open.Caused_by_Equipment_Failure._Closed_-26_Repaired_CS-2D118A_to_Ensure_Ease…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1996-012-01, :on 951111,normally Locked Closed Valve Discovered 1.5 Turns Open.Caused by Equipment Failure. Closed & Repaired CS-118A to Ensure Ease of Operation.W/

05000382/LER-1996-013-01, :on 960822,possible Operation in Excess of 100% Licensed Power.Cause Is Being Investigated
type: Subject
page: https://kanterella.com/05000382/LER-2D1996-2D013-2D01-2C_-3Aon_960822-2Cpossible_Operation_in_Excess_of_100-_Licensed_Power.Cause_Is_Being_Investigated
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1996-013-01, :on 960822,possible Operation in Excess of 100% Licensed Power.Cause Is Being Investigated

LER-1996-011, :on 960820,failed to Provide Administrative Control of Isolation Valves Required by Ts.Caused by Station Operating Procedures for Plant Startup Not Emphasizing TS Requirements for Valves.Revised Surveillance
type: Subject
label: 05000334/LER-1996-011, :on 960820,failed to Provide Administrative Control of Isolation Valves Required by Ts.Caused by Station Operating Procedures for Plant Startup Not Emphasizing TS Requirements for Valves.Revised Surveillance
page: https://kanterella.com/05000334/LER-2D1996-2D011-2C_-3Aon_960820-2Cfailed_to_Provide_Administrative_Control_of_Isolation_Valves_Required_by_Ts.Caused_by_Station_Operating_Procedures_for_Plant_Startup_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000334/LER-1996-011, :on 960820,failed to Provide Administrative Control of Isolation Valves Required by Ts.Caused by Station Operating Procedures for Plant Startup Not Emphasizing TS Requirements for Valves.Revised Surveillance

05000348/LER-1996-003, :on 960602,actuation of ESF Equipment Occurred Due to Relay Contact Failure.Relay Replaced
type: Subject
page: https://kanterella.com/05000348/LER-2D1996-2D003-2C_-3Aon_960602-2Cactuation_of_ESF_Equipment_Occurred_Due_to_Relay_Contact_Failure.Relay_Replaced
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000348/LER-1996-003, :on 960602,actuation of ESF Equipment Occurred Due to Relay Contact Failure.Relay Replaced

LER-1996-007-01, :on 960411,discovered That Design Basis Flow Rates Could Not Be Achieved on Auxiliary Component Cooling Water Sys.Caused by Inadequate Design.Modified Sys Design & Reviewed Other safety-related Fluid Systems
type: Subject
label: 05000382/LER-1996-007-01, :on 960411,discovered That Design Basis Flow Rates Could Not Be Achieved on Auxiliary Component Cooling Water Sys.Caused by Inadequate Design.Modified Sys Design & Reviewed Other safety-related Fluid Systems
page: https://kanterella.com/05000382/LER-2D1996-2D007-2D01-2C_-3Aon_960411-2Cdiscovered_That_Design_Basis_Flow_Rates_Could_Not_Be_Achieved_on_Auxiliary_Component_Cooling_Water_Sys.Caused_by_Inadequate_Desi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1996-007-01, :on 960411,discovered That Design Basis Flow Rates Could Not Be Achieved on Auxiliary Component Cooling Water Sys.Caused by Inadequate Design.Modified Sys Design & Reviewed Other safety-related Fluid Systems

LER-1996-004-01, :on 960506,standby Shutdown Sys Found Outside Design Basis.Caused by Misinterpretation of Info.Changed Design Basis Document Based on Corrected Calculations & Implemented Mod to Ensure Water Availability
type: Subject
label: 05000413/LER-1996-004-01, :on 960506,standby Shutdown Sys Found Outside Design Basis.Caused by Misinterpretation of Info.Changed Design Basis Document Based on Corrected Calculations & Implemented Mod to Ensure Water Availability
page: https://kanterella.com/05000413/LER-2D1996-2D004-2D01-2C_-3Aon_960506-2Cstandby_Shutdown_Sys_Found_Outside_Design_Basis.Caused_by_Misinterpretation_of_Info.Changed_Design_Basis_Document_Based_on_Corre…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000413/LER-1996-004-01, :on 960506,standby Shutdown Sys Found Outside Design Basis.Caused by Misinterpretation of Info.Changed Design Basis Document Based on Corrected Calculations & Implemented Mod to Ensure Water Availability

LER-1996-004-01, :on 960420,surveillance Test Not Performed for Neutron Flux Channel.Caused by Personnel Error.Operations Personnel Counseled,Event Reviewed in Training & Procedures Will Be Modified
type: Subject
label: 05000424/LER-1996-004-01, :on 960420,surveillance Test Not Performed for Neutron Flux Channel.Caused by Personnel Error.Operations Personnel Counseled,Event Reviewed in Training & Procedures Will Be Modified
page: https://kanterella.com/05000424/LER-2D1996-2D004-2D01-2C_-3Aon_960420-2Csurveillance_Test_Not_Performed_for_Neutron_Flux_Channel.Caused_by_Personnel_Error.Operations_Personnel_Counseled-2CEvent_Review…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000424/LER-1996-004-01, :on 960420,surveillance Test Not Performed for Neutron Flux Channel.Caused by Personnel Error.Operations Personnel Counseled,Event Reviewed in Training & Procedures Will Be Modified

05000317/LER-1996-002, :on 960410,required Fire Watch Missed.Caused by Lack of Fire Watch Ownership.Circumstances of Event Will Be Reviewed W/Appropriate Groups
type: Subject
page: https://kanterella.com/05000317/LER-2D1996-2D002-2C_-3Aon_960410-2Crequired_Fire_Watch_Missed.Caused_by_Lack_of_Fire_Watch_Ownership.Circumstances_of_Event_Will_Be_Reviewed_W/Appropriate_Groups
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000317/LER-1996-002, :on 960410,required Fire Watch Missed.Caused by Lack of Fire Watch Ownership.Circumstances of Event Will Be Reviewed W/Appropriate Groups

LER-1996-005, :on 960401,core Alterations Performed Without Required Radiation Monitors Being in Svc Occurred.Caused by Contradiction Between Refueling Procedure & Reactor Vessel Head Removal.Procedures Revised
type: Subject
label: 05000334/LER-1996-005, :on 960401,core Alterations Performed Without Required Radiation Monitors Being in Svc Occurred.Caused by Contradiction Between Refueling Procedure & Reactor Vessel Head Removal.Procedures Revised
page: https://kanterella.com/05000334/LER-2D1996-2D005-2C_-3Aon_960401-2Ccore_Alterations_Performed_Without_Required_Radiation_Monitors_Being_in_Svc_Occurred.Caused_by_Contradiction_Between_Refueling_Proced…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000334/LER-1996-005, :on 960401,core Alterations Performed Without Required Radiation Monitors Being in Svc Occurred.Caused by Contradiction Between Refueling Procedure & Reactor Vessel Head Removal.Procedures Revised

LER-1985-004-01, :on 850128,reactor Tripped on lo-lo Steam Generator Level When Main Feedwater Pump Tripped on Low Suction Pressure Signal.Caused by Failure of Pneumatic Pressure Transmitter.Components Replaced
type: Subject
label: 05000369/LER-1985-004-01, :on 850128,reactor Tripped on lo-lo Steam Generator Level When Main Feedwater Pump Tripped on Low Suction Pressure Signal.Caused by Failure of Pneumatic Pressure Transmitter.Components Replaced
page: https://kanterella.com/05000369/LER-2D1985-2D004-2D01-2C_-3Aon_850128-2Creactor_Tripped_on_lo-2Dlo_Steam_Generator_Level_When_Main_Feedwater_Pump_Tripped_on_Low_Suction_Pressure_Signal.Caused_by_Failu…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000369/LER-1985-004-01, :on 850128,reactor Tripped on lo-lo Steam Generator Level When Main Feedwater Pump Tripped on Low Suction Pressure Signal.Caused by Failure of Pneumatic Pressure Transmitter.Components Replaced

LER-1996-004-01, :on 960326,potential Failure of Personnel Airlock Control Sys for Units Was Discovered.Caused by Failure to Consider All Design & Licensing Interfaces in Design Validation.Completed Procedure Changes
type: Subject
label: 05000445/LER-1996-004-01, :on 960326,potential Failure of Personnel Airlock Control Sys for Units Was Discovered.Caused by Failure to Consider All Design & Licensing Interfaces in Design Validation.Completed Procedure Changes
page: https://kanterella.com/05000445/LER-2D1996-2D004-2D01-2C_-3Aon_960326-2Cpotential_Failure_of_Personnel_Airlock_Control_Sys_for_Units_Was_Discovered.Caused_by_Failure_to_Consider_All_Design_-26_Licensi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000445/LER-1996-004-01, :on 960326,potential Failure of Personnel Airlock Control Sys for Units Was Discovered.Caused by Failure to Consider All Design & Licensing Interfaces in Design Validation.Completed Procedure Changes

05000334/LER-1996-001-01, :on 960320,main Steam Valve Setpoints Not within Specification.Caused by Relatively Small Amount of Normal Setpoint Drift.C/A:Main Steam Safety Valve Adjustment Performed
type: Subject
page: https://kanterella.com/05000334/LER-2D1996-2D001-2D01-2C_-3Aon_960320-2Cmain_Steam_Valve_Setpoints_Not_within_Specification.Caused_by_Relatively_Small_Amount_of_Normal_Setpoint_Drift.C/A-3AMain_Steam_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000334/LER-1996-001-01, :on 960320,main Steam Valve Setpoints Not within Specification.Caused by Relatively Small Amount of Normal Setpoint Drift.C/A:Main Steam Safety Valve Adjustment Performed

05000293/LER-1995-011, :on 951206,RCICS Was Inoperable Due to Unplanned Maint to Replace Intermittent Tripping Power Inverter.Mr 19503503 Was Initiated to Perform Initial Troubleshooting
type: Subject
page: https://kanterella.com/05000293/LER-2D1995-2D011-2C_-3Aon_951206-2CRCICS_Was_Inoperable_Due_to_Unplanned_Maint_to_Replace_Intermittent_Tripping_Power_Inverter.Mr_19503503_Was_Initiated_to_Perform_Init…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1995-011, :on 951206,RCICS Was Inoperable Due to Unplanned Maint to Replace Intermittent Tripping Power Inverter.Mr 19503503 Was Initiated to Perform Initial Troubleshooting

LER-1996-001-01, :on 960117,discovered During TS Hourly Fire Watch Surveillance of Div I,Ii & III CSC Pump Rooms,Div I Room Not Observed.Caused by Personnel Error.Fire Watch Surveillance for Div I Room Established
type: Subject
label: 05000374/LER-1996-001-01, :on 960117,discovered During TS Hourly Fire Watch Surveillance of Div I,Ii & III CSC Pump Rooms,Div I Room Not Observed.Caused by Personnel Error.Fire Watch Surveillance for Div I Room Established
page: https://kanterella.com/05000374/LER-2D1996-2D001-2D01-2C_-3Aon_960117-2Cdiscovered_During_TS_Hourly_Fire_Watch_Surveillance_of_Div_I-2CIi_-26_III_CSC_Pump_Rooms-2CDiv_I_Room_Not_Observed.Caused_by_Per…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000374/LER-1996-001-01, :on 960117,discovered During TS Hourly Fire Watch Surveillance of Div I,Ii & III CSC Pump Rooms,Div I Room Not Observed.Caused by Personnel Error.Fire Watch Surveillance for Div I Room Established

LER-1996-002, :on 960303,containment Particulate & Gaseous Radiation Monitors Inoperable.Caused by Inadequate Review of Containment Gaseous & Particulate Radiation Monitor. Suppl & Exhaust MOVs Shut
type: Subject
label: 05000338/LER-1996-002, :on 960303,containment Particulate & Gaseous Radiation Monitors Inoperable.Caused by Inadequate Review of Containment Gaseous & Particulate Radiation Monitor. Suppl & Exhaust MOVs Shut
page: https://kanterella.com/05000338/LER-2D1996-2D002-2C_-3Aon_960303-2Ccontainment_Particulate_-26_Gaseous_Radiation_Monitors_Inoperable.Caused_by_Inadequate_Review_of_Containment_Gaseous_-26_Particulate_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000338/LER-1996-002, :on 960303,containment Particulate & Gaseous Radiation Monitors Inoperable.Caused by Inadequate Review of Containment Gaseous & Particulate Radiation Monitor. Suppl & Exhaust MOVs Shut

LER-1984-024, :on 841116,spurious Safety Injection Occurred When Returning Consequences Limiting Safeguards,High Phase (Equivalent to Containment Depressurization Actuation Sys) to Svc.Impact on Unit Minimal
type: Subject
label: 05000280/LER-1984-024, :on 841116,spurious Safety Injection Occurred When Returning Consequences Limiting Safeguards,High Phase (Equivalent to Containment Depressurization Actuation Sys) to Svc.Impact on Unit Minimal
page: https://kanterella.com/05000280/LER-2D1984-2D024-2C_-3Aon_841116-2Cspurious_Safety_Injection_Occurred_When_Returning_Consequences_Limiting_Safeguards-2CHigh_Phase_-28Equivalent_to_Containment_Depressu…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000280/LER-1984-024, :on 841116,spurious Safety Injection Occurred When Returning Consequences Limiting Safeguards,High Phase (Equivalent to Containment Depressurization Actuation Sys) to Svc.Impact on Unit Minimal

05000336/LER-1996-006-01, :on 960207,service Water Pump Motor Flood Protection Not Provided.Caused by Inadequate Administrative Controls.Administrative Controls Established
type: Subject
page: https://kanterella.com/05000336/LER-2D1996-2D006-2D01-2C_-3Aon_960207-2Cservice_Water_Pump_Motor_Flood_Protection_Not_Provided.Caused_by_Inadequate_Administrative_Controls.Administrative_Controls_Esta…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1996-006-01, :on 960207,service Water Pump Motor Flood Protection Not Provided.Caused by Inadequate Administrative Controls.Administrative Controls Established

LER-1984-003-01, :on 840521,two Steam Generator Snubbers Being Tested Offsite Were Low on Fluid.Rear Monoball Bearing on One Steam Generator Snubber Failed at Less than Design Load. All Snubbers Rebuilt
type: Subject
label: 05000261/LER-1984-003-01, :on 840521,two Steam Generator Snubbers Being Tested Offsite Were Low on Fluid.Rear Monoball Bearing on One Steam Generator Snubber Failed at Less than Design Load. All Snubbers Rebuilt
page: https://kanterella.com/05000261/LER-2D1984-2D003-2D01-2C_-3Aon_840521-2Ctwo_Steam_Generator_Snubbers_Being_Tested_Offsite_Were_Low_on_Fluid.Rear_Monoball_Bearing_on_One_Steam_Generator_Snubber_Failed_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000261/LER-1984-003-01, :on 840521,two Steam Generator Snubbers Being Tested Offsite Were Low on Fluid.Rear Monoball Bearing on One Steam Generator Snubber Failed at Less than Design Load. All Snubbers Rebuilt

05000354/LER-1996-001, :on 960113,safety & Turbine Acs Heat Exchangers Fouled W/Detritus Occurred Due to Failed Svc Water Strainer. Strainers Replaced & Enhanced Maint & Design Mod
type: Subject
page: https://kanterella.com/05000354/LER-2D1996-2D001-2C_-3Aon_960113-2Csafety_-26_Turbine_Acs_Heat_Exchangers_Fouled_W/Detritus_Occurred_Due_to_Failed_Svc_Water_Strainer._Strainers_Replaced_-26_Enhanced_M…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000354/LER-1996-001, :on 960113,safety & Turbine Acs Heat Exchangers Fouled W/Detritus Occurred Due to Failed Svc Water Strainer. Strainers Replaced & Enhanced Maint & Design Mod

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 306A
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-1996-001-02, :on 960206,loss of Offsite Power Due to Electrical Component Failures Occurred.Caused by Application of Type of Resistor Bushing Used.All Resister Bushing in Application Replaced
type: Subject
label: 05000414/LER-1996-001-02, :on 960206,loss of Offsite Power Due to Electrical Component Failures Occurred.Caused by Application of Type of Resistor Bushing Used.All Resister Bushing in Application Replaced
page: https://kanterella.com/05000414/LER-2D1996-2D001-2D02-2C_-3Aon_960206-2Closs_of_Offsite_Power_Due_to_Electrical_Component_Failures_Occurred.Caused_by_Application_of_Type_of_Resistor_Bushing_Used.All_R…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000414/LER-1996-001-02, :on 960206,loss of Offsite Power Due to Electrical Component Failures Occurred.Caused by Application of Type of Resistor Bushing Used.All Resister Bushing in Application Replaced

Digital Reip Units Identified.Caused by Circuit Breaker Component Not Operating as Specified.Issued SA for Operability
type: Subject
label: 05000285/LER-1995-007, :on 951108,potential Tripping of 480 Volt Circuit Breakers W/Digital Reip Units Identified.Caused by Circuit Breaker Component Not Operating as Specified.Issued SA for Operability
page: https://kanterella.com/05000285/LER-2D1995-2D007-2C_-3Aon_951108-2Cpotential_Tripping_of_480_Volt_Circuit_Breakers_W/Digital_Reip_Units_Identified.Caused_by_Circuit_Breaker_Component_Not_Operating_as_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1995-007, :on 951108,potential Tripping of 480 Volt Circuit Breakers W/Digital Reip Units Identified.Caused by Circuit Breaker Component Not Operating as Specified.Issued SA for Operability

05000369/LER-1996-002-01, :on 960204,inadvertent Manual Initiation of Unit 1 FW Isolation Occurred Due to Inappropriate Action. OPS Mgt Evaluated Depressing & Holding Train a & B CF Isolation
type: Subject
page: https://kanterella.com/05000369/LER-2D1996-2D002-2D01-2C_-3Aon_960204-2Cinadvertent_Manual_Initiation_of_Unit_1_FW_Isolation_Occurred_Due_to_Inappropriate_Action._OPS_Mgt_Evaluated_Depressing_-26_Hold…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000369/LER-1996-002-01, :on 960204,inadvertent Manual Initiation of Unit 1 FW Isolation Occurred Due to Inappropriate Action. OPS Mgt Evaluated Depressing & Holding Train a & B CF Isolation

LER-1996-003-01, :on 960130,logarithmic Power Channels Indicated 5 Percent of Scale Below Actual Power.Caused by Not Periodically cross-correlating Log Power to Linear Power. Recalibrated Log Power Channels
type: Subject
label: 05000382/LER-1996-003-01, :on 960130,logarithmic Power Channels Indicated 5 Percent of Scale Below Actual Power.Caused by Not Periodically cross-correlating Log Power to Linear Power. Recalibrated Log Power Channels
page: https://kanterella.com/05000382/LER-2D1996-2D003-2D01-2C_-3Aon_960130-2Clogarithmic_Power_Channels_Indicated_5_Percent_of_Scale_Below_Actual_Power.Caused_by_Not_Periodically_cross-2Dcorrelating_Log_Po…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1996-003-01, :on 960130,logarithmic Power Channels Indicated 5 Percent of Scale Below Actual Power.Caused by Not Periodically cross-correlating Log Power to Linear Power. Recalibrated Log Power Channels

05000370/LER-1984-027, :on 841025,manual Reactor Trip Initiated Following Loss of Main Feedwater Pump 2A Due to Water in Pump Control Oil Sys.Water Drained from Filters & Sys Restarted
type: Subject
page: https://kanterella.com/05000370/LER-2D1984-2D027-2C_-3Aon_841025-2Cmanual_Reactor_Trip_Initiated_Following_Loss_of_Main_Feedwater_Pump_2A_Due_to_Water_in_Pump_Control_Oil_Sys.Water_Drained_from_Filter…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000370/LER-1984-027, :on 841025,manual Reactor Trip Initiated Following Loss of Main Feedwater Pump 2A Due to Water in Pump Control Oil Sys.Water Drained from Filters & Sys Restarted

05000445/LER-1996-002-01, :on 960122,loss of MFW Flow Due to FW Isolation Valves Closing Resulted in Manual Rt.Caused by Less than Adequate Initial Troubleshooting Plan.Revised Operations Procedures
type: Subject
page: https://kanterella.com/05000445/LER-2D1996-2D002-2D01-2C_-3Aon_960122-2Closs_of_MFW_Flow_Due_to_FW_Isolation_Valves_Closing_Resulted_in_Manual_Rt.Caused_by_Less_than_Adequate_Initial_Troubleshooting_P…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000445/LER-1996-002-01, :on 960122,loss of MFW Flow Due to FW Isolation Valves Closing Resulted in Manual Rt.Caused by Less than Adequate Initial Troubleshooting Plan.Revised Operations Procedures

LER-1996-001-02, :on 960121,discovered Fire Watch Patrol Did Not Patrol Some Assigned Areas in Control Bldg & on 960126,fire Watch Patrol Not Performed within Timeframe Required by Ts. Appropriate Disciplinary Action Taken
type: Subject
label: 05000327/LER-1996-001-02, :on 960121,discovered Fire Watch Patrol Did Not Patrol Some Assigned Areas in Control Bldg & on 960126,fire Watch Patrol Not Performed within Timeframe Required by Ts. Appropriate Disciplinary Action Taken
page: https://kanterella.com/05000327/LER-2D1996-2D001-2D02-2C_-3Aon_960121-2Cdiscovered_Fire_Watch_Patrol_Did_Not_Patrol_Some_Assigned_Areas_in_Control_Bldg_-26_on_960126-2Cfire_Watch_Patrol_Not_Performed_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000327/LER-1996-001-02, :on 960121,discovered Fire Watch Patrol Did Not Patrol Some Assigned Areas in Control Bldg & on 960126,fire Watch Patrol Not Performed within Timeframe Required by Ts. Appropriate Disciplinary Action Taken

05000370/LER-1985-004-02, :on 850204,small Hole Discovered in Metal Plate Covering Fire Barrier Penetration in Floor of Control Room. Cause Unknown.Fire Watch Established,Pending Repair of Hole
type: Subject
page: https://kanterella.com/05000370/LER-2D1985-2D004-2D02-2C_-3Aon_850204-2Csmall_Hole_Discovered_in_Metal_Plate_Covering_Fire_Barrier_Penetration_in_Floor_of_Control_Room._Cause_Unknown.Fire_Watch_Establ…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000370/LER-1985-004-02, :on 850204,small Hole Discovered in Metal Plate Covering Fire Barrier Penetration in Floor of Control Room. Cause Unknown.Fire Watch Established,Pending Repair of Hole

LER-1996-002, :on 960126,voluntary Entry Into TS 3.0.3 Made to Recover Train a Chillwater Due to Equipment Problem on Chiller a Which Was Supplying Train a ESF Equipment.No Specific Corrective Action for Event Warranted
type: Subject
label: 05000395/LER-1996-002, :on 960126,voluntary Entry Into TS 3.0.3 Made to Recover Train a Chillwater Due to Equipment Problem on Chiller a Which Was Supplying Train a ESF Equipment.No Specific Corrective Action for Event Warranted
page: https://kanterella.com/05000395/LER-2D1996-2D002-2C_-3Aon_960126-2Cvoluntary_Entry_Into_TS_3.0.3_Made_to_Recover_Train_a_Chillwater_Due_to_Equipment_Problem_on_Chiller_a_Which_Was_Supplying_Train_a_ES…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000395/LER-1996-002, :on 960126,voluntary Entry Into TS 3.0.3 Made to Recover Train a Chillwater Due to Equipment Problem on Chiller a Which Was Supplying Train a ESF Equipment.No Specific Corrective Action for Event Warranted

LER-1996-002, :on 960126,noted That TS Surveillance for Turbine Overspeed Missed Due to Oversight in Rescheduling Required Surveillance by Cognizant Personnel.Test Completed on 960126 & Event Reviewed as Lesson Learned
type: Subject
label: 05000446/LER-1996-002, :on 960126,noted That TS Surveillance for Turbine Overspeed Missed Due to Oversight in Rescheduling Required Surveillance by Cognizant Personnel.Test Completed on 960126 & Event Reviewed as Lesson Learned
page: https://kanterella.com/05000446/LER-2D1996-2D002-2C_-3Aon_960126-2Cnoted_That_TS_Surveillance_for_Turbine_Overspeed_Missed_Due_to_Oversight_in_Rescheduling_Required_Surveillance_by_Cognizant_Personnel…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000446/LER-1996-002, :on 960126,noted That TS Surveillance for Turbine Overspeed Missed Due to Oversight in Rescheduling Required Surveillance by Cognizant Personnel.Test Completed on 960126 & Event Reviewed as Lesson Learned

4 Inch Socket Welds on C RCS Loop Flow Instrumentation Line & RCP Seal Injection Drain Line.Caused by Vibration Induced Fatigue at Stress Riser in Weld.Welds & Weld Bosses Removed
type: Subject
label: 05000423/LER-1995-019-02, :on 951201,leaks Found in 3/4 Inch Socket Welds on C RCS Loop Flow Instrumentation Line & RCP Seal Injection Drain Line.Caused by Vibration Induced Fatigue at Stress Riser in Weld.Welds & Weld Bosses Removed
page: https://kanterella.com/05000423/LER-2D1995-2D019-2D02-2C_-3Aon_951201-2Cleaks_Found_in_3/4_Inch_Socket_Welds_on_C_RCS_Loop_Flow_Instrumentation_Line_-26_RCP_Seal_Injection_Drain_Line.Caused_by_Vibrati…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000423/LER-1995-019-02, :on 951201,leaks Found in 3/4 Inch Socket Welds on C RCS Loop Flow Instrumentation Line & RCP Seal Injection Drain Line.Caused by Vibration Induced Fatigue at Stress Riser in Weld.Welds & Weld Bosses Removed

05000305/LER-1985-003, :on 850208,reactor Tripped.Caused by Decrease in Steam Generator Vol to Low Level Alarm Setpoints. Corrective Action Being Investigated
type: Subject
page: https://kanterella.com/05000305/LER-2D1985-2D003-2C_-3Aon_850208-2Creactor_Tripped.Caused_by_Decrease_in_Steam_Generator_Vol_to_Low_Level_Alarm_Setpoints._Corrective_Action_Being_Investigated
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000305/LER-1985-003, :on 850208,reactor Tripped.Caused by Decrease in Steam Generator Vol to Low Level Alarm Setpoints. Corrective Action Being Investigated

05000354/LER-1996-001-03, :on 960113,safety & Turbine Acs HXs Fouled W/Grass Due to Failed Service Water Strainer.Caused by Detritus Overloading.Strainer Replaced & Maint & Design Mods Enhanced
type: Subject
page: https://kanterella.com/05000354/LER-2D1996-2D001-2D03-2C_-3Aon_960113-2Csafety_-26_Turbine_Acs_HXs_Fouled_W/Grass_Due_to_Failed_Service_Water_Strainer.Caused_by_Detritus_Overloading.Strainer_Replaced_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000354/LER-1996-001-03, :on 960113,safety & Turbine Acs HXs Fouled W/Grass Due to Failed Service Water Strainer.Caused by Detritus Overloading.Strainer Replaced & Maint & Design Mods Enhanced

05000269/LER-1995-007, :on 951106,LPIS Was Technically Inoperable Due to Deficient Design Change.Valves Modified to Prevent Key from Vibrating Out of Keyway
type: Subject
page: https://kanterella.com/05000269/LER-2D1995-2D007-2C_-3Aon_951106-2CLPIS_Was_Technically_Inoperable_Due_to_Deficient_Design_Change.Valves_Modified_to_Prevent_Key_from_Vibrating_Out_of_Keyway
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000269/LER-1995-007, :on 951106,LPIS Was Technically Inoperable Due to Deficient Design Change.Valves Modified to Prevent Key from Vibrating Out of Keyway

LER-1992-005, :on 920306,Group 1 Primary Containment Isolation & Plant Scram Occurred.Caused by Failure of Contacts on Reactor Mode Switch to Fully Close.Switch Taken to Refuel & Scram & Isolation Reset
type: Subject
label: 05000271/LER-1992-005, :on 920306,Group 1 Primary Containment Isolation & Plant Scram Occurred.Caused by Failure of Contacts on Reactor Mode Switch to Fully Close.Switch Taken to Refuel & Scram & Isolation Reset
page: https://kanterella.com/05000271/LER-2D1992-2D005-2C_-3Aon_920306-2CGroup_1_Primary_Containment_Isolation_-26_Plant_Scram_Occurred.Caused_by_Failure_of_Contacts_on_Reactor_Mode_Switch_to_Fully_Close.Sw…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000271/LER-1992-005, :on 920306,Group 1 Primary Containment Isolation & Plant Scram Occurred.Caused by Failure of Contacts on Reactor Mode Switch to Fully Close.Switch Taken to Refuel & Scram & Isolation Reset

05000423/LER-1995-021-02, :on 951207,loop Stop Valves on One Loop Opened W/O Performing TS Surveillance Due to Procedure Inadequacy. Util Evaluated Whether Change Needed to Clarify TS
type: Subject
page: https://kanterella.com/05000423/LER-2D1995-2D021-2D02-2C_-3Aon_951207-2Cloop_Stop_Valves_on_One_Loop_Opened_W/O_Performing_TS_Surveillance_Due_to_Procedure_Inadequacy._Util_Evaluated_Whether_Change_Ne…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000423/LER-1995-021-02, :on 951207,loop Stop Valves on One Loop Opened W/O Performing TS Surveillance Due to Procedure Inadequacy. Util Evaluated Whether Change Needed to Clarify TS

LER-1995-007-04, :on 950525,ECW Sys Flow Degradation Occurred Due to Iron Deposits Settling on Seats of Individual Room Cooler Chilled Water Manual Throttle Valves.Restored Chilled Water Flow to Established Design Conditions
type: Subject
label: 05000382/LER-1995-007-04, :on 950525,ECW Sys Flow Degradation Occurred Due to Iron Deposits Settling on Seats of Individual Room Cooler Chilled Water Manual Throttle Valves.Restored Chilled Water Flow to Established Design Conditions
page: https://kanterella.com/05000382/LER-2D1995-2D007-2D04-2C_-3Aon_950525-2CECW_Sys_Flow_Degradation_Occurred_Due_to_Iron_Deposits_Settling_on_Seats_of_Individual_Room_Cooler_Chilled_Water_Manual_Throttle…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1995-007-04, :on 950525,ECW Sys Flow Degradation Occurred Due to Iron Deposits Settling on Seats of Individual Room Cooler Chilled Water Manual Throttle Valves.Restored Chilled Water Flow to Established Design Conditions

05000382/LER-1995-006-04, :on 951207,failed to Provide Backup Overcurrent Protection Due to Personnel Error.Installed Backup Overcurrent Protection for Circuits & Tested Two Breakers
type: Subject
page: https://kanterella.com/05000382/LER-2D1995-2D006-2D04-2C_-3Aon_951207-2Cfailed_to_Provide_Backup_Overcurrent_Protection_Due_to_Personnel_Error.Installed_Backup_Overcurrent_Protection_for_Circuits_-26_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1995-006-04, :on 951207,failed to Provide Backup Overcurrent Protection Due to Personnel Error.Installed Backup Overcurrent Protection for Circuits & Tested Two Breakers

LER-1995-027, :on 951206,leak Found in Underground EFW Pump Recirculation Line.Caused by Nearby Excavation Using Power Tools.Mechanical Clamping Device Temporarily Used to Stop Leak Until Repairs Scheduled for 960229
type: Subject
label: 05000302/LER-1995-027, :on 951206,leak Found in Underground EFW Pump Recirculation Line.Caused by Nearby Excavation Using Power Tools.Mechanical Clamping Device Temporarily Used to Stop Leak Until Repairs Scheduled for 960229
page: https://kanterella.com/05000302/LER-2D1995-2D027-2C_-3Aon_951206-2Cleak_Found_in_Underground_EFW_Pump_Recirculation_Line.Caused_by_Nearby_Excavation_Using_Power_Tools.Mechanical_Clamping_Device_Tempor…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000302/LER-1995-027, :on 951206,leak Found in Underground EFW Pump Recirculation Line.Caused by Nearby Excavation Using Power Tools.Mechanical Clamping Device Temporarily Used to Stop Leak Until Repairs Scheduled for 960229

relief & Safety Valves Found Outside TS Limiting Safety Sys Setting.Caused by Corrosion Bonding of Pilot Disc to Pilot Seat.Safety Relief Valve Surveillance Procedure Revised
type: Subject
label: 05000298/LER-1995-017, :on 951023,safety/relief & Safety Valves Found Outside TS Limiting Safety Sys Setting.Caused by Corrosion Bonding of Pilot Disc to Pilot Seat.Safety Relief Valve Surveillance Procedure Revised
page: https://kanterella.com/05000298/LER-2D1995-2D017-2C_-3Aon_951023-2Csafety/relief_-26_Safety_Valves_Found_Outside_TS_Limiting_Safety_Sys_Setting.Caused_by_Corrosion_Bonding_of_Pilot_Disc_to_Pilot_Seat.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000298/LER-1995-017, :on 951023,safety/relief & Safety Valves Found Outside TS Limiting Safety Sys Setting.Caused by Corrosion Bonding of Pilot Disc to Pilot Seat.Safety Relief Valve Surveillance Procedure Revised

05000364/LER-1995-008, :on 951128,reactor Trip Occurred During DEH Card Change Out.Caused by Latent Design Defect in DEH Circuitry.Three Cards W/Latest Hardware Rev Replaced Correcting Defect
type: Subject
page: https://kanterella.com/05000364/LER-2D1995-2D008-2C_-3Aon_951128-2Creactor_Trip_Occurred_During_DEH_Card_Change_Out.Caused_by_Latent_Design_Defect_in_DEH_Circuitry.Three_Cards_W/Latest_Hardware_Rev_Re…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000364/LER-1995-008, :on 951128,reactor Trip Occurred During DEH Card Change Out.Caused by Latent Design Defect in DEH Circuitry.Three Cards W/Latest Hardware Rev Replaced Correcting Defect

LER-1992-011, :on 920406,coil of Control Relay in Containment Atmospheric Control Sys Failed,Resulting in Loss of Power to Containment Isolation Valves.Caused by Relay Aging.Relay Coil Replaced & Action Plan Developed
type: Subject
label: 05000325/LER-1992-011, :on 920406,coil of Control Relay in Containment Atmospheric Control Sys Failed,Resulting in Loss of Power to Containment Isolation Valves.Caused by Relay Aging.Relay Coil Replaced & Action Plan Developed
page: https://kanterella.com/05000325/LER-2D1992-2D011-2C_-3Aon_920406-2Ccoil_of_Control_Relay_in_Containment_Atmospheric_Control_Sys_Failed-2CResulting_in_Loss_of_Power_to_Containment_Isolation_Valves.Caus…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000325/LER-1992-011, :on 920406,coil of Control Relay in Containment Atmospheric Control Sys Failed,Resulting in Loss of Power to Containment Isolation Valves.Caused by Relay Aging.Relay Coil Replaced & Action Plan Developed

05000354/LER-1995-030, :on 951106,FRVS Noble Gas Surveillance Was Missed Due to Personnel Error.Revised Procedure
type: Subject
page: https://kanterella.com/05000354/LER-2D1995-2D030-2C_-3Aon_951106-2CFRVS_Noble_Gas_Surveillance_Was_Missed_Due_to_Personnel_Error.Revised_Procedure
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000354/LER-1995-030, :on 951106,FRVS Noble Gas Surveillance Was Missed Due to Personnel Error.Revised Procedure

LER-1995-024, :on 951030,annubar Flow Tap Orientation Caused Seismic Qualification Concerns Resulted in Operation Outside Design Basis of Plant.Caused by Personnel Error.Placed Aft Under Administrative Control
type: Subject
label: 05000302/LER-1995-024, :on 951030,annubar Flow Tap Orientation Caused Seismic Qualification Concerns Resulted in Operation Outside Design Basis of Plant.Caused by Personnel Error.Placed Aft Under Administrative Control
page: https://kanterella.com/05000302/LER-2D1995-2D024-2C_-3Aon_951030-2Cannubar_Flow_Tap_Orientation_Caused_Seismic_Qualification_Concerns_Resulted_in_Operation_Outside_Design_Basis_of_Plant.Caused_by_Pers…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000302/LER-1995-024, :on 951030,annubar Flow Tap Orientation Caused Seismic Qualification Concerns Resulted in Operation Outside Design Basis of Plant.Caused by Personnel Error.Placed Aft Under Administrative Control

05000331/LER-1995-011, :on 951019,during Surveillance Test Procedure, a Sdg Outboard Bearing Temp Reached 205 F.Caused by Incorrectly Installed Room Temp Controller.Controller Reconfigured
type: Subject
page: https://kanterella.com/05000331/LER-2D1995-2D011-2C_-3Aon_951019-2Cduring_Surveillance_Test_Procedure-2C_a_Sdg_Outboard_Bearing_Temp_Reached_205_F.Caused_by_Incorrectly_Installed_Room_Temp_Controller.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000331/LER-1995-011, :on 951019,during Surveillance Test Procedure, a Sdg Outboard Bearing Temp Reached 205 F.Caused by Incorrectly Installed Room Temp Controller.Controller Reconfigured

05000354/LER-1995-029, :on 951102,both Trains of Standby Liquid Control Declared Inoperable Due to Failure to Perform Surveillance Per IST Requirements.Audit Team Performed in- Depth Review of Sys
type: Subject
page: https://kanterella.com/05000354/LER-2D1995-2D029-2C_-3Aon_951102-2Cboth_Trains_of_Standby_Liquid_Control_Declared_Inoperable_Due_to_Failure_to_Perform_Surveillance_Per_IST_Requirements.Audit_Team_Perf…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000354/LER-1995-029, :on 951102,both Trains of Standby Liquid Control Declared Inoperable Due to Failure to Perform Surveillance Per IST Requirements.Audit Team Performed in- Depth Review of Sys

LER-1995-020, :on 950908,automatic Actuation of HPCI Suction Path Swapover ESF Occurred.Caused by Absence of Realistic Operating Band Considering Loop Inaccuracies.Incorporated Realistic Band Into Operations Procedures
type: Subject
label: 05000354/LER-1995-020, :on 950908,automatic Actuation of HPCI Suction Path Swapover ESF Occurred.Caused by Absence of Realistic Operating Band Considering Loop Inaccuracies.Incorporated Realistic Band Into Operations Procedures
page: https://kanterella.com/05000354/LER-2D1995-2D020-2C_-3Aon_950908-2Cautomatic_Actuation_of_HPCI_Suction_Path_Swapover_ESF_Occurred.Caused_by_Absence_of_Realistic_Operating_Band_Considering_Loop_Inaccur…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000354/LER-1995-020, :on 950908,automatic Actuation of HPCI Suction Path Swapover ESF Occurred.Caused by Absence of Realistic Operating Band Considering Loop Inaccuracies.Incorporated Realistic Band Into Operations Procedures

LER-1995-004-01, :on 951026,inadvertent ESF Actuation Occurred as Result of Improper Relay Alignment.Assigned Addl Technician to Concurrently Check Proper Removal & Installation of Remaining Relays
type: Subject
label: 05000301/LER-1995-004-01, :on 951026,inadvertent ESF Actuation Occurred as Result of Improper Relay Alignment.Assigned Addl Technician to Concurrently Check Proper Removal & Installation of Remaining Relays
page: https://kanterella.com/05000301/LER-2D1995-2D004-2D01-2C_-3Aon_951026-2Cinadvertent_ESF_Actuation_Occurred_as_Result_of_Improper_Relay_Alignment.Assigned_Addl_Technician_to_Concurrently_Check_Proper_R…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000301/LER-1995-004-01, :on 951026,inadvertent ESF Actuation Occurred as Result of Improper Relay Alignment.Assigned Addl Technician to Concurrently Check Proper Removal & Installation of Remaining Relays

05000354/LER-1995-028, :on 951030,failed to Exert Best Efforts to Restore Liquid Effluent Radiation Monitoring Sys to Operable Status.Caused by Low Mgt Priority Given.Improved Related Processes
type: Subject
page: https://kanterella.com/05000354/LER-2D1995-2D028-2C_-3Aon_951030-2Cfailed_to_Exert_Best_Efforts_to_Restore_Liquid_Effluent_Radiation_Monitoring_Sys_to_Operable_Status.Caused_by_Low_Mgt_Priority_Given.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000354/LER-1995-028, :on 951030,failed to Exert Best Efforts to Restore Liquid Effluent Radiation Monitoring Sys to Operable Status.Caused by Low Mgt Priority Given.Improved Related Processes

LER-1995-005-04, :on 951102,calibr Input Data for Rosemount Instrument Transmitters Was in Error.Caused by Ineffective Review Process for Instrument Calculations.Established Administrative Control for SIT Level Control
type: Subject
label: 05000382/LER-1995-005-04, :on 951102,calibr Input Data for Rosemount Instrument Transmitters Was in Error.Caused by Ineffective Review Process for Instrument Calculations.Established Administrative Control for SIT Level Control
page: https://kanterella.com/05000382/LER-2D1995-2D005-2D04-2C_-3Aon_951102-2Ccalibr_Input_Data_for_Rosemount_Instrument_Transmitters_Was_in_Error.Caused_by_Ineffective_Review_Process_for_Instrument_Calcula…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000382/LER-1995-005-04, :on 951102,calibr Input Data for Rosemount Instrument Transmitters Was in Error.Caused by Ineffective Review Process for Instrument Calculations.Established Administrative Control for SIT Level Control

05000301/LER-1995-005-01, :on 951025,plugged 46 Tubes Due to Degradation in Roll Transition,Tubesheet Crevice & Tube Support Plate Regions.Performed Closeout Insps Following Maint of Each Sg
type: Subject
page: https://kanterella.com/05000301/LER-2D1995-2D005-2D01-2C_-3Aon_951025-2Cplugged_46_Tubes_Due_to_Degradation_in_Roll_Transition-2CTubesheet_Crevice_-26_Tube_Support_Plate_Regions.Performed_Closeout_Ins…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000301/LER-1995-005-01, :on 951025,plugged 46 Tubes Due to Degradation in Roll Transition,Tubesheet Crevice & Tube Support Plate Regions.Performed Closeout Insps Following Maint of Each Sg

LER-1995-006, :on 950824,improper Start of Number 1 DG Caused Rt.Caused by Inadequate Administrative Controls on Critical Parameter.Provided Addl Administrative Controls to Ensure That Governor Was Operated Correctly
type: Subject
label: 05000285/LER-1995-006, :on 950824,improper Start of Number 1 DG Caused Rt.Caused by Inadequate Administrative Controls on Critical Parameter.Provided Addl Administrative Controls to Ensure That Governor Was Operated Correctly
page: https://kanterella.com/05000285/LER-2D1995-2D006-2C_-3Aon_950824-2Cimproper_Start_of_Number_1_DG_Caused_Rt.Caused_by_Inadequate_Administrative_Controls_on_Critical_Parameter.Provided_Addl_Administrati…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1995-006, :on 950824,improper Start of Number 1 DG Caused Rt.Caused by Inadequate Administrative Controls on Critical Parameter.Provided Addl Administrative Controls to Ensure That Governor Was Operated Correctly

LER-1995-015, :on 951101,ESF Actuation Occurred Due to Misinterpretation of Procedural Note of Determining Differential Proessure Across MSIV Prior to Opening Valve. Counseled Involved Personnel
type: Subject
label: 05000327/LER-1995-015, :on 951101,ESF Actuation Occurred Due to Misinterpretation of Procedural Note of Determining Differential Proessure Across MSIV Prior to Opening Valve. Counseled Involved Personnel
page: https://kanterella.com/05000327/LER-2D1995-2D015-2C_-3Aon_951101-2CESF_Actuation_Occurred_Due_to_Misinterpretation_of_Procedural_Note_of_Determining_Differential_Proessure_Across_MSIV_Prior_to_Opening…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000327/LER-1995-015, :on 951101,ESF Actuation Occurred Due to Misinterpretation of Procedural Note of Determining Differential Proessure Across MSIV Prior to Opening Valve. Counseled Involved Personnel

LER-1995-006-01, :on 951101,maximum Reactor Power Exceeded Over 8 Hour Period Due to Oversight in Original Validation of Computer Calorimetric Software in Identifying Limitations of Software Program.Changed Procedures
type: Subject
label: 05000424/LER-1995-006-01, :on 951101,maximum Reactor Power Exceeded Over 8 Hour Period Due to Oversight in Original Validation of Computer Calorimetric Software in Identifying Limitations of Software Program.Changed Procedures
page: https://kanterella.com/05000424/LER-2D1995-2D006-2D01-2C_-3Aon_951101-2Cmaximum_Reactor_Power_Exceeded_Over_8_Hour_Period_Due_to_Oversight_in_Original_Validation_of_Computer_Calorimetric_Software_in_I…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000424/LER-1995-006-01, :on 951101,maximum Reactor Power Exceeded Over 8 Hour Period Due to Oversight in Original Validation of Computer Calorimetric Software in Identifying Limitations of Software Program.Changed Procedures

LER-1995-013, :on 951010,surveillance Was Missed During Mode 6.Caused by Inadequate Training of Licensed Operators in Use of 12-wk Schedule.Revised Procedures to Include Comprehensive List of Routine SIs
type: Subject
label: 05000327/LER-1995-013, :on 951010,surveillance Was Missed During Mode 6.Caused by Inadequate Training of Licensed Operators in Use of 12-wk Schedule.Revised Procedures to Include Comprehensive List of Routine SIs
page: https://kanterella.com/05000327/LER-2D1995-2D013-2C_-3Aon_951010-2Csurveillance_Was_Missed_During_Mode_6.Caused_by_Inadequate_Training_of_Licensed_Operators_in_Use_of_12-2Dwk_Schedule.Revised_Procedur…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000327/LER-1995-013, :on 951010,surveillance Was Missed During Mode 6.Caused by Inadequate Training of Licensed Operators in Use of 12-wk Schedule.Revised Procedures to Include Comprehensive List of Routine SIs

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 306A
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

Shift Personnel & Formal Training Will Be Provided to Personnel Involved in Valve line-ups
type: Subject
label: 05000263/LER-1995-007-01, :on 951012,valve RHR 74-2 Found Closed & Unlocked.Caused by Personnel Errors.Event Discussed W/Shift Personnel & Formal Training Will Be Provided to Personnel Involved in Valve line-ups
page: https://kanterella.com/05000263/LER-2D1995-2D007-2D01-2C_-3Aon_951012-2Cvalve_RHR_74-2D2_Found_Closed_-26_Unlocked.Caused_by_Personnel_Errors.Event_Discussed_W/Shift_Personnel_-26_Formal_Training_Will…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000263/LER-1995-007-01, :on 951012,valve RHR 74-2 Found Closed & Unlocked.Caused by Personnel Errors.Event Discussed W/Shift Personnel & Formal Training Will Be Provided to Personnel Involved in Valve line-ups

LER-1995-024-01, :on 950928,missed Special Rept for Filtration Recirculation Ventilation Sys High Range Noble Gas Monitor Rendered Inoperable on 950913.Caused by Personnel Error. Required Special Rept 95-03 Issued on 951024
type: Subject
label: 05000354/LER-1995-024-01, :on 950928,missed Special Rept for Filtration Recirculation Ventilation Sys High Range Noble Gas Monitor Rendered Inoperable on 950913.Caused by Personnel Error. Required Special Rept 95-03 Issued on 951024
page: https://kanterella.com/05000354/LER-2D1995-2D024-2D01-2C_-3Aon_950928-2Cmissed_Special_Rept_for_Filtration_Recirculation_Ventilation_Sys_High_Range_Noble_Gas_Monitor_Rendered_Inoperable_on_950913.Caus…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000354/LER-1995-024-01, :on 950928,missed Special Rept for Filtration Recirculation Ventilation Sys High Range Noble Gas Monitor Rendered Inoperable on 950913.Caused by Personnel Error. Required Special Rept 95-03 Issued on 951024

Unit in Mode 5 & One Source Range Nuclear Instrument Channel Inoperable Due to Inadequate Surveillance Procedure. Closed & re-hanged Temp Lift on 1CV8428
type: Subject
label: 05000456/LER-1995-011-04, :on 951002,B Dilution Prevention Valve Opened W/Unit in Mode 5 & One Source Range Nuclear Instrument Channel Inoperable Due to Inadequate Surveillance Procedure. Closed & re-hanged Temp Lift on 1CV8428
page: https://kanterella.com/05000456/LER-2D1995-2D011-2D04-2C_-3Aon_951002-2CB_Dilution_Prevention_Valve_Opened_W/Unit_in_Mode_5_-26_One_Source_Range_Nuclear_Instrument_Channel_Inoperable_Due_to_Inadequate…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000456/LER-1995-011-04, :on 951002,B Dilution Prevention Valve Opened W/Unit in Mode 5 & One Source Range Nuclear Instrument Channel Inoperable Due to Inadequate Surveillance Procedure. Closed & re-hanged Temp Lift on 1CV8428

LER-1995-009, :on 951008,classified Results of SG Tube Insps Performed During Unit 1 Thirteenth Refueling Outage of 328 Tubes as Category C-8 Due to 3.34- of Tubes Inspected Being Defective.Required Tubes Plugged or Repaired
type: Subject
label: 05000348/LER-1995-009, :on 951008,classified Results of SG Tube Insps Performed During Unit 1 Thirteenth Refueling Outage of 328 Tubes as Category C-8 Due to 3.34% of Tubes Inspected Being Defective.Required Tubes Plugged or Repaired
page: https://kanterella.com/05000348/LER-2D1995-2D009-2C_-3Aon_951008-2Cclassified_Results_of_SG_Tube_Insps_Performed_During_Unit_1_Thirteenth_Refueling_Outage_of_328_Tubes_as_Category_C-2D8_Due_to_3.34-_o…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000348/LER-1995-009, :on 951008,classified Results of SG Tube Insps Performed During Unit 1 Thirteenth Refueling Outage of 328 Tubes as Category C-8 Due to 3.34% of Tubes Inspected Being Defective.Required Tubes Plugged or Repaired

LER-1995-005-03, :on 950927,manual Reactor Trip Initiated After Valve 1SM-0007AB,MSIV Steam Line a Moved to Fail Safe (Closed) Position.Cause Unknown.Associated Fuses,Sv Coils, Some Wiring Terminations & Relays Replaced
type: Subject
label: 05000369/LER-1995-005-03, :on 950927,manual Reactor Trip Initiated After Valve 1SM-0007AB,MSIV Steam Line a Moved to Fail Safe (Closed) Position.Cause Unknown.Associated Fuses,Sv Coils, Some Wiring Terminations & Relays Replaced
page: https://kanterella.com/05000369/LER-2D1995-2D005-2D03-2C_-3Aon_950927-2Cmanual_Reactor_Trip_Initiated_After_Valve_1SM-2D0007AB-2CMSIV_Steam_Line_a_Moved_to_Fail_Safe_-28Closed-29_Position.Cause_Unknow…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000369/LER-1995-005-03, :on 950927,manual Reactor Trip Initiated After Valve 1SM-0007AB,MSIV Steam Line a Moved to Fail Safe (Closed) Position.Cause Unknown.Associated Fuses,Sv Coils, Some Wiring Terminations & Relays Replaced

05000412/LER-1995-007-01, :on 951003,recirculation Spray Sys B Train Header Flow Was Less than TS Requirement Due to Personnel Error.Properly Adjusted 2SWS-MOV105D
type: Subject
page: https://kanterella.com/05000412/LER-2D1995-2D007-2D01-2C_-3Aon_951003-2Crecirculation_Spray_Sys_B_Train_Header_Flow_Was_Less_than_TS_Requirement_Due_to_Personnel_Error.Properly_Adjusted_2SWS-2DMOV105D
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000412/LER-1995-007-01, :on 951003,recirculation Spray Sys B Train Header Flow Was Less than TS Requirement Due to Personnel Error.Properly Adjusted 2SWS-MOV105D

05000336/LER-1995-036, :on 950922,identified That Quarterly Surveillance for Valve 2-SW-1A Missed Due to Personnel Error.Valve 2-SW-1A Tested & Verified Operable & IST Program Surveillances Reviewed
type: Subject
page: https://kanterella.com/05000336/LER-2D1995-2D036-2C_-3Aon_950922-2Cidentified_That_Quarterly_Surveillance_for_Valve_2-2DSW-2D1A_Missed_Due_to_Personnel_Error.Valve_2-2DSW-2D1A_Tested_-26_Verified_Oper…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1995-036, :on 950922,identified That Quarterly Surveillance for Valve 2-SW-1A Missed Due to Personnel Error.Valve 2-SW-1A Tested & Verified Operable & IST Program Surveillances Reviewed

05000339/LER-1995-001-01, :on 950403,MS Pressurizer Safety Valve Setpoints Out of Tolerance Due to Setpoint Drift.Repaired MSSVs
type: Subject
page: https://kanterella.com/05000339/LER-2D1995-2D001-2D01-2C_-3Aon_950403-2CMS_Pressurizer_Safety_Valve_Setpoints_Out_of_Tolerance_Due_to_Setpoint_Drift.Repaired_MSSVs
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000339/LER-1995-001-01, :on 950403,MS Pressurizer Safety Valve Setpoints Out of Tolerance Due to Setpoint Drift.Repaired MSSVs

05000315/LER-1984-007-01, :on 840522,detector Code Programming Error Discovered in Calculational Logic While Modifying Code. Procedure Change Made to Require Independent Line by Line Review of Coding
type: Subject
page: https://kanterella.com/05000315/LER-2D1984-2D007-2D01-2C_-3Aon_840522-2Cdetector_Code_Programming_Error_Discovered_in_Calculational_Logic_While_Modifying_Code._Procedure_Change_Made_to_Require_Indepen…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000315/LER-1984-007-01, :on 840522,detector Code Programming Error Discovered in Calculational Logic While Modifying Code. Procedure Change Made to Require Independent Line by Line Review of Coding

05000336/LER-1995-034, :on 950822,TS Surveillance Was Missed Due to Personnel Error.Performed Surveillance Shortly After Time Interval Had Expired
type: Subject
page: https://kanterella.com/05000336/LER-2D1995-2D034-2C_-3Aon_950822-2CTS_Surveillance_Was_Missed_Due_to_Personnel_Error.Performed_Surveillance_Shortly_After_Time_Interval_Had_Expired
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1995-034, :on 950822,TS Surveillance Was Missed Due to Personnel Error.Performed Surveillance Shortly After Time Interval Had Expired

05000277/LER-1995-003-03, :on 950815,unplanned ESF Actuation Occurred When Wire Was Out in Junction Box.Evaluated Addl Labelling & Print Revs
type: Subject
page: https://kanterella.com/05000277/LER-2D1995-2D003-2D03-2C_-3Aon_950815-2Cunplanned_ESF_Actuation_Occurred_When_Wire_Was_Out_in_Junction_Box.Evaluated_Addl_Labelling_-26_Print_Revs
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000277/LER-1995-003-03, :on 950815,unplanned ESF Actuation Occurred When Wire Was Out in Junction Box.Evaluated Addl Labelling & Print Revs

05000293/LER-1995-008, :on 950814,primary Containment Sys Isolation Valve Was Unable to Close Fully on Automatic Signal Due to Wiring Discrepancy.Trained Personnel for Maint on Specific Event
type: Subject
page: https://kanterella.com/05000293/LER-2D1995-2D008-2C_-3Aon_950814-2Cprimary_Containment_Sys_Isolation_Valve_Was_Unable_to_Close_Fully_on_Automatic_Signal_Due_to_Wiring_Discrepancy.Trained_Personnel_for…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1995-008, :on 950814,primary Containment Sys Isolation Valve Was Unable to Close Fully on Automatic Signal Due to Wiring Discrepancy.Trained Personnel for Maint on Specific Event

LER-1995-004-01, :on 950816,inoperable Fire Barrier Penetration Seal Was Discovered.Caused by Inadequate Engineering Oversight & Less than Adequate Surveillance Procedure.Sealed Penetration Seal
type: Subject
label: 05000317/LER-1995-004-01, :on 950816,inoperable Fire Barrier Penetration Seal Was Discovered.Caused by Inadequate Engineering Oversight & Less than Adequate Surveillance Procedure.Sealed Penetration Seal
page: https://kanterella.com/05000317/LER-2D1995-2D004-2D01-2C_-3Aon_950816-2Cinoperable_Fire_Barrier_Penetration_Seal_Was_Discovered.Caused_by_Inadequate_Engineering_Oversight_-26_Less_than_Adequate_Survei…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000317/LER-1995-004-01, :on 950816,inoperable Fire Barrier Penetration Seal Was Discovered.Caused by Inadequate Engineering Oversight & Less than Adequate Surveillance Procedure.Sealed Penetration Seal

LER-1995-033, :on 950809,manual RT Initiated Due to Loss of Atmospheric Dump Valve Control.Caused by Blown Fuse on Circuit Board in Control Circuit of Valve.Circuit Board Replaced & Valve Returned to Svc
type: Subject
label: 05000336/LER-1995-033, :on 950809,manual RT Initiated Due to Loss of Atmospheric Dump Valve Control.Caused by Blown Fuse on Circuit Board in Control Circuit of Valve.Circuit Board Replaced & Valve Returned to Svc
page: https://kanterella.com/05000336/LER-2D1995-2D033-2C_-3Aon_950809-2Cmanual_RT_Initiated_Due_to_Loss_of_Atmospheric_Dump_Valve_Control.Caused_by_Blown_Fuse_on_Circuit_Board_in_Control_Circuit_of_Valve.C…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1995-033, :on 950809,manual RT Initiated Due to Loss of Atmospheric Dump Valve Control.Caused by Blown Fuse on Circuit Board in Control Circuit of Valve.Circuit Board Replaced & Valve Returned to Svc

LER-1984-028, :on 840507,during Storm,Arcing Occurred Across Open Disconnect for 500 Kv Switchyard Breaker,Causing Loss of Power Which Resulted in Reactor Water Cleanup Reactor Isolation.Plant Shut Down
type: Subject
label: 05000416/LER-1984-028, :on 840507,during Storm,Arcing Occurred Across Open Disconnect for 500 Kv Switchyard Breaker,Causing Loss of Power Which Resulted in Reactor Water Cleanup Reactor Isolation.Plant Shut Down
page: https://kanterella.com/05000416/LER-2D1984-2D028-2C_-3Aon_840507-2Cduring_Storm-2CArcing_Occurred_Across_Open_Disconnect_for_500_Kv_Switchyard_Breaker-2CCausing_Loss_of_Power_Which_Resulted_in_Reactor…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000416/LER-1984-028, :on 840507,during Storm,Arcing Occurred Across Open Disconnect for 500 Kv Switchyard Breaker,Causing Loss of Power Which Resulted in Reactor Water Cleanup Reactor Isolation.Plant Shut Down

LER-1992-006, :on 920209,failure to Verify RCS Flow Above TS Limits Led to LCO 3.2.5.After Exit from Lco,Failure to Check SI Criteria Renewed Error.Caused by Personnel Error.Si Data Sheets Revised & Personnel Counselled
type: Subject
label: 05000327/LER-1992-006, :on 920209,failure to Verify RCS Flow Above TS Limits Led to LCO 3.2.5.After Exit from Lco,Failure to Check SI Criteria Renewed Error.Caused by Personnel Error.Si Data Sheets Revised & Personnel Counselled
page: https://kanterella.com/05000327/LER-2D1992-2D006-2C_-3Aon_920209-2Cfailure_to_Verify_RCS_Flow_Above_TS_Limits_Led_to_LCO_3.2.5.After_Exit_from_Lco-2CFailure_to_Check_SI_Criteria_Renewed_Error.Caused_b…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000327/LER-1992-006, :on 920209,failure to Verify RCS Flow Above TS Limits Led to LCO 3.2.5.After Exit from Lco,Failure to Check SI Criteria Renewed Error.Caused by Personnel Error.Si Data Sheets Revised & Personnel Counselled

LER-1984-002-02, :on 840216,reactor Trip Initiated by Reactor Protection Sys When High RCS Pressure Setpoint Reached. Caused by Failure of Rc Loop a Flow Transmitter Due to Malfunctioning Amplifier Assembly
type: Subject
label: 05000287/LER-1984-002-02, :on 840216,reactor Trip Initiated by Reactor Protection Sys When High RCS Pressure Setpoint Reached. Caused by Failure of Rc Loop a Flow Transmitter Due to Malfunctioning Amplifier Assembly
page: https://kanterella.com/05000287/LER-2D1984-2D002-2D02-2C_-3Aon_840216-2Creactor_Trip_Initiated_by_Reactor_Protection_Sys_When_High_RCS_Pressure_Setpoint_Reached._Caused_by_Failure_of_Rc_Loop_a_Flow_Tr…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000287/LER-1984-002-02, :on 840216,reactor Trip Initiated by Reactor Protection Sys When High RCS Pressure Setpoint Reached. Caused by Failure of Rc Loop a Flow Transmitter Due to Malfunctioning Amplifier Assembly

05000423/LER-1995-014-01, :on 950713,TDAFWP Did Not Start within One Minute as Required by TS While Performing Surveillance Test on Tdafwp Due to Governor Valve Position.Revised Procedures
type: Subject
page: https://kanterella.com/05000423/LER-2D1995-2D014-2D01-2C_-3Aon_950713-2CTDAFWP_Did_Not_Start_within_One_Minute_as_Required_by_TS_While_Performing_Surveillance_Test_on_Tdafwp_Due_to_Governor_Valve_Posi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000423/LER-1995-014-01, :on 950713,TDAFWP Did Not Start within One Minute as Required by TS While Performing Surveillance Test on Tdafwp Due to Governor Valve Position.Revised Procedures

Or Associated Bypass Valve. Caused by Obstruction in Valve Seating Area.Valve Disassembled & Repaired
type: Subject
label: 05000277/LER-1991-039, :on 911206,excessive Leakage Noted in RHR Sys B Loop Injection Check Valve &/Or Associated Bypass Valve. Caused by Obstruction in Valve Seating Area.Valve Disassembled & Repaired
page: https://kanterella.com/05000277/LER-2D1991-2D039-2C_-3Aon_911206-2Cexcessive_Leakage_Noted_in_RHR_Sys_B_Loop_Injection_Check_Valve_-26/Or_Associated_Bypass_Valve._Caused_by_Obstruction_in_Valve_Seatin…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000277/LER-1991-039, :on 911206,excessive Leakage Noted in RHR Sys B Loop Injection Check Valve &/Or Associated Bypass Valve. Caused by Obstruction in Valve Seating Area.Valve Disassembled & Repaired

LER-1995-024, :on 950614,surveillance Frequency for Fire Detection Instrumentation Was Incorrect Due to Personnel Error.Revised Applicable Surveillance Procedure That Changed Frequency to Required semi-annual Interval
type: Subject
label: 05000336/LER-1995-024, :on 950614,surveillance Frequency for Fire Detection Instrumentation Was Incorrect Due to Personnel Error.Revised Applicable Surveillance Procedure That Changed Frequency to Required semi-annual Interval
page: https://kanterella.com/05000336/LER-2D1995-2D024-2C_-3Aon_950614-2Csurveillance_Frequency_for_Fire_Detection_Instrumentation_Was_Incorrect_Due_to_Personnel_Error.Revised_Applicable_Surveillance_Proced…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1995-024, :on 950614,surveillance Frequency for Fire Detection Instrumentation Was Incorrect Due to Personnel Error.Revised Applicable Surveillance Procedure That Changed Frequency to Required semi-annual Interval

LER-1995-005, :on 950627,incorrect Train Identification Resulted in Missed TS Surveillance Test.Caused by Cognitive Personnel Error on Part of Uss.Counseled Uss on Importance of Accuracy in Identifying Components
type: Subject
label: 05000425/LER-1995-005, :on 950627,incorrect Train Identification Resulted in Missed TS Surveillance Test.Caused by Cognitive Personnel Error on Part of Uss.Counseled Uss on Importance of Accuracy in Identifying Components
page: https://kanterella.com/05000425/LER-2D1995-2D005-2C_-3Aon_950627-2Cincorrect_Train_Identification_Resulted_in_Missed_TS_Surveillance_Test.Caused_by_Cognitive_Personnel_Error_on_Part_of_Uss.Counseled_U…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000425/LER-1995-005, :on 950627,incorrect Train Identification Resulted in Missed TS Surveillance Test.Caused by Cognitive Personnel Error on Part of Uss.Counseled Uss on Importance of Accuracy in Identifying Components

LER-1991-006-03, :on 911107,reactor Tripped on lo-lo Steam Generator Level in Loop 4 During MSIV Partial Stroke Test. Caused by Failure of Limit Switch to Actuate.Switch Replaced & MSIV Successfully Retested
type: Subject
label: 05000328/LER-1991-006-03, :on 911107,reactor Tripped on lo-lo Steam Generator Level in Loop 4 During MSIV Partial Stroke Test. Caused by Failure of Limit Switch to Actuate.Switch Replaced & MSIV Successfully Retested
page: https://kanterella.com/05000328/LER-2D1991-2D006-2D03-2C_-3Aon_911107-2Creactor_Tripped_on_lo-2Dlo_Steam_Generator_Level_in_Loop_4_During_MSIV_Partial_Stroke_Test._Caused_by_Failure_of_Limit_Switch_to…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000328/LER-1991-006-03, :on 911107,reactor Tripped on lo-lo Steam Generator Level in Loop 4 During MSIV Partial Stroke Test. Caused by Failure of Limit Switch to Actuate.Switch Replaced & MSIV Successfully Retested

LER-1995-005, :on 950524,facility Manually Tripped Due Ground Fault in Mcc.Area Around MCC 208 Quarantined,Action Taken to Strengthen Expectations & Work Practices & Maint Orders Issued to Inspect,Repair,Clean & Test MCC 208
type: Subject
label: 05000318/LER-1995-005, :on 950524,facility Manually Tripped Due Ground Fault in Mcc.Area Around MCC 208 Quarantined,Action Taken to Strengthen Expectations & Work Practices & Maint Orders Issued to Inspect,Repair,Clean & Test MCC 208
page: https://kanterella.com/05000318/LER-2D1995-2D005-2C_-3Aon_950524-2Cfacility_Manually_Tripped_Due_Ground_Fault_in_Mcc.Area_Around_MCC_208_Quarantined-2CAction_Taken_to_Strengthen_Expectations_-26_Work_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000318/LER-1995-005, :on 950524,facility Manually Tripped Due Ground Fault in Mcc.Area Around MCC 208 Quarantined,Action Taken to Strengthen Expectations & Work Practices & Maint Orders Issued to Inspect,Repair,Clean & Test MCC 208

05000364/LER-1995-005, :on 950601,loss of electro-hydraulic Fluid Resulted in Manual Rts.Repaired & Selected Welds on Eh Sys of 2A & 2B SGFP
type: Subject
page: https://kanterella.com/05000364/LER-2D1995-2D005-2C_-3Aon_950601-2Closs_of_electro-2Dhydraulic_Fluid_Resulted_in_Manual_Rts.Repaired_-26_Selected_Welds_on_Eh_Sys_of_2A_-26_2B_SGFP
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000364/LER-1995-005, :on 950601,loss of electro-hydraulic Fluid Resulted in Manual Rts.Repaired & Selected Welds on Eh Sys of 2A & 2B SGFP

05000369/LER-1995-001-01, :on 950129,Unit 1 Manual Reactor Trip Was Initiated Due to Equipment Failure.Replaced Type of Fuse in Applications Deemed Critical to Plant Operation
type: Subject
page: https://kanterella.com/05000369/LER-2D1995-2D001-2D01-2C_-3Aon_950129-2CUnit_1_Manual_Reactor_Trip_Was_Initiated_Due_to_Equipment_Failure.Replaced_Type_of_Fuse_in_Applications_Deemed_Critical_to_Plant…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000369/LER-1995-001-01, :on 950129,Unit 1 Manual Reactor Trip Was Initiated Due to Equipment Failure.Replaced Type of Fuse in Applications Deemed Critical to Plant Operation

05000317/LER-1995-001-01, :on 950415,Unit 1 Entered TS 3.0.3 When EDG Supplying Backup Power Became Inoperable.Caused by Leaking Fuel Injector Pump Due to Improper Drainage.Drain Lines Cleaned
type: Subject
page: https://kanterella.com/05000317/LER-2D1995-2D001-2D01-2C_-3Aon_950415-2CUnit_1_Entered_TS_3.0.3_When_EDG_Supplying_Backup_Power_Became_Inoperable.Caused_by_Leaking_Fuel_Injector_Pump_Due_to_Improper_D…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000317/LER-1995-001-01, :on 950415,Unit 1 Entered TS 3.0.3 When EDG Supplying Backup Power Became Inoperable.Caused by Leaking Fuel Injector Pump Due to Improper Drainage.Drain Lines Cleaned

LER-1995-004, :on 950414,fire Occurred in Section of Expansion Joint Matl in K Line Wall,Burning Approx Three Linear Feet of Cork Matl.Caused by Sparks from Welding Near Wall.Fire Watches Posted & Walkdown Performed
type: Subject
label: 05000318/LER-1995-004, :on 950414,fire Occurred in Section of Expansion Joint Matl in K Line Wall,Burning Approx Three Linear Feet of Cork Matl.Caused by Sparks from Welding Near Wall.Fire Watches Posted & Walkdown Performed
page: https://kanterella.com/05000318/LER-2D1995-2D004-2C_-3Aon_950414-2Cfire_Occurred_in_Section_of_Expansion_Joint_Matl_in_K_Line_Wall-2CBurning_Approx_Three_Linear_Feet_of_Cork_Matl.Caused_by_Sparks_from…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000318/LER-1995-004, :on 950414,fire Occurred in Section of Expansion Joint Matl in K Line Wall,Burning Approx Three Linear Feet of Cork Matl.Caused by Sparks from Welding Near Wall.Fire Watches Posted & Walkdown Performed

Inactive SRO License Assumed Position of Fuel Handling SRO for Movement of Upper Guide Structure Into Rv.Caused by Failure to Recognize Inactive Status.Briefing Conducted
type: Subject
label: 05000336/LER-1995-016, :on 950428,operator W/Inactive SRO License Assumed Position of Fuel Handling SRO for Movement of Upper Guide Structure Into Rv.Caused by Failure to Recognize Inactive Status.Briefing Conducted
page: https://kanterella.com/05000336/LER-2D1995-2D016-2C_-3Aon_950428-2Coperator_W/Inactive_SRO_License_Assumed_Position_of_Fuel_Handling_SRO_for_Movement_of_Upper_Guide_Structure_Into_Rv.Caused_by_Failure…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1995-016, :on 950428,operator W/Inactive SRO License Assumed Position of Fuel Handling SRO for Movement of Upper Guide Structure Into Rv.Caused by Failure to Recognize Inactive Status.Briefing Conducted

LER-1995-002, :on 950327,containment Polar Crane Was Used to Move Reactor Vessel Internals Lift Rig Over Reactor Vessel.Usar & TS Did Not Clearly Identify Containment Closure Requirements.Ca Will Revise USAR
type: Subject
label: 05000285/LER-1995-002, :on 950327,containment Polar Crane Was Used to Move Reactor Vessel Internals Lift Rig Over Reactor Vessel.Usar & TS Did Not Clearly Identify Containment Closure Requirements.Ca Will Revise USAR
page: https://kanterella.com/05000285/LER-2D1995-2D002-2C_-3Aon_950327-2Ccontainment_Polar_Crane_Was_Used_to_Move_Reactor_Vessel_Internals_Lift_Rig_Over_Reactor_Vessel.Usar_-26_TS_Did_Not_Clearly_Identify_C…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1995-002, :on 950327,containment Polar Crane Was Used to Move Reactor Vessel Internals Lift Rig Over Reactor Vessel.Usar & TS Did Not Clearly Identify Containment Closure Requirements.Ca Will Revise USAR

05000336/LER-1995-014, :on 950404,continuous Fire Watch Was Found Sleeping in West 480 Volt Switchgear Room Due to Personnel Error.Posted Another Individual as Fire Watch
type: Subject
page: https://kanterella.com/05000336/LER-2D1995-2D014-2C_-3Aon_950404-2Ccontinuous_Fire_Watch_Was_Found_Sleeping_in_West_480_Volt_Switchgear_Room_Due_to_Personnel_Error.Posted_Another_Individual_as_Fire_Wa…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1995-014, :on 950404,continuous Fire Watch Was Found Sleeping in West 480 Volt Switchgear Room Due to Personnel Error.Posted Another Individual as Fire Watch

Control Circuit Wiring.Design Change Package 1757 Implemented to Reverse Wiring of Thermocouples 3A & 4A
type: Subject
label: 05000334/LER-1991-020, :on 910622,hydrogen Recombiner Declared Inoperable Due to Incorrect Thermocouple/Control Circuit Wiring.Design Change Package 1757 Implemented to Reverse Wiring of Thermocouples 3A & 4A
page: https://kanterella.com/05000334/LER-2D1991-2D020-2C_-3Aon_910622-2Chydrogen_Recombiner_Declared_Inoperable_Due_to_Incorrect_Thermocouple/Control_Circuit_Wiring.Design_Change_Package_1757_Implemented_t…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000334/LER-1991-020, :on 910622,hydrogen Recombiner Declared Inoperable Due to Incorrect Thermocouple/Control Circuit Wiring.Design Change Package 1757 Implemented to Reverse Wiring of Thermocouples 3A & 4A

05000269/LER-1994-004, :on 950215,determined That LPSW Sys Inoperable in Past Due Design Deficiency.Hpsw Design Basis Document Will Be Reviewed & Updated as Required
type: Subject
page: https://kanterella.com/05000269/LER-2D1994-2D004-2C_-3Aon_950215-2Cdetermined_That_LPSW_Sys_Inoperable_in_Past_Due_Design_Deficiency.Hpsw_Design_Basis_Document_Will_Be_Reviewed_-26_Updated_as_Required
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000269/LER-1994-004, :on 950215,determined That LPSW Sys Inoperable in Past Due Design Deficiency.Hpsw Design Basis Document Will Be Reviewed & Updated as Required

LER-1991-004, :on 910514,reactor Vessel Level Instruments Discovered Incorrectly Calibrated.Caused by Personnel Error. Plant Recalibrated Reactor Vessel to Proper Range & Review by Engineer Performed
type: Subject
label: 05000302/LER-1991-004, :on 910514,reactor Vessel Level Instruments Discovered Incorrectly Calibrated.Caused by Personnel Error. Plant Recalibrated Reactor Vessel to Proper Range & Review by Engineer Performed
page: https://kanterella.com/05000302/LER-2D1991-2D004-2C_-3Aon_910514-2Creactor_Vessel_Level_Instruments_Discovered_Incorrectly_Calibrated.Caused_by_Personnel_Error._Plant_Recalibrated_Reactor_Vessel_to_Pr…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000302/LER-1991-004, :on 910514,reactor Vessel Level Instruments Discovered Incorrectly Calibrated.Caused by Personnel Error. Plant Recalibrated Reactor Vessel to Proper Range & Review by Engineer Performed

LER-1995-002-01, :on 950125,confirmed That Assumptions Made for Original Design Basis Analysis for Containment Sump Isolation Valve non-conservative.Caused by Inadequate Evaluation.Second Review Completed
type: Subject
label: 05000336/LER-1995-002-01, :on 950125,confirmed That Assumptions Made for Original Design Basis Analysis for Containment Sump Isolation Valve non-conservative.Caused by Inadequate Evaluation.Second Review Completed
page: https://kanterella.com/05000336/LER-2D1995-2D002-2D01-2C_-3Aon_950125-2Cconfirmed_That_Assumptions_Made_for_Original_Design_Basis_Analysis_for_Containment_Sump_Isolation_Valve_non-2Dconservative.Cause…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1995-002-01, :on 950125,confirmed That Assumptions Made for Original Design Basis Analysis for Containment Sump Isolation Valve non-conservative.Caused by Inadequate Evaluation.Second Review Completed

LER-1995-001, :on 950206,missed Grab Sample on SW Radiation While Maint Was Being Performed on Sample Pump.Caused by No Administrative Aids to Ensure That Shift Took Required Samples.Took Sample Immediately
type: Subject
label: 05000263/LER-1995-001, :on 950206,missed Grab Sample on SW Radiation While Maint Was Being Performed on Sample Pump.Caused by No Administrative Aids to Ensure That Shift Took Required Samples.Took Sample Immediately
page: https://kanterella.com/05000263/LER-2D1995-2D001-2C_-3Aon_950206-2Cmissed_Grab_Sample_on_SW_Radiation_While_Maint_Was_Being_Performed_on_Sample_Pump.Caused_by_No_Administrative_Aids_to_Ensure_That_Shi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000263/LER-1995-001, :on 950206,missed Grab Sample on SW Radiation While Maint Was Being Performed on Sample Pump.Caused by No Administrative Aids to Ensure That Shift Took Required Samples.Took Sample Immediately

LER-1995-001, :on 950126,determined That LOCA Analysis Results for 2 Ft Core Elevation Potentially non-conservative Due to Modeling Errors.Vendor Evaluated Current Fuel Cycle to Determine If Operating Limits Valid
type: Subject
label: 05000346/LER-1995-001, :on 950126,determined That LOCA Analysis Results for 2 Ft Core Elevation Potentially non-conservative Due to Modeling Errors.Vendor Evaluated Current Fuel Cycle to Determine If Operating Limits Valid
page: https://kanterella.com/05000346/LER-2D1995-2D001-2C_-3Aon_950126-2Cdetermined_That_LOCA_Analysis_Results_for_2_Ft_Core_Elevation_Potentially_non-2Dconservative_Due_to_Modeling_Errors.Vendor_Evaluated_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000346/LER-1995-001, :on 950126,determined That LOCA Analysis Results for 2 Ft Core Elevation Potentially non-conservative Due to Modeling Errors.Vendor Evaluated Current Fuel Cycle to Determine If Operating Limits Valid

LER-1995-002-01, :on 950221,Train a of Control Room Ventilation Sys Judged Technically Past Inoperable Occurred.Caused by Inadequate Review of Cumulative Effects of Field Changes. Throttling Procedure Put in Place
type: Subject
label: 05000369/LER-1995-002-01, :on 950221,Train a of Control Room Ventilation Sys Judged Technically Past Inoperable Occurred.Caused by Inadequate Review of Cumulative Effects of Field Changes. Throttling Procedure Put in Place
page: https://kanterella.com/05000369/LER-2D1995-2D002-2D01-2C_-3Aon_950221-2CTrain_a_of_Control_Room_Ventilation_Sys_Judged_Technically_Past_Inoperable_Occurred.Caused_by_Inadequate_Review_of_Cumulative_Ef…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000369/LER-1995-002-01, :on 950221,Train a of Control Room Ventilation Sys Judged Technically Past Inoperable Occurred.Caused by Inadequate Review of Cumulative Effects of Field Changes. Throttling Procedure Put in Place

LER-1994-007, :on 941024,DGs 1B & 2A Experienced Inadvertent Starts Due to Unanticipated Interaction of Components. Struthers Dunn 219DXBP Type Relays Used in DG Control Circuitry for Four DGs Replaced
type: Subject
label: 05000369/LER-1994-007, :on 941024,DGs 1B & 2A Experienced Inadvertent Starts Due to Unanticipated Interaction of Components. Struthers Dunn 219DXBP Type Relays Used in DG Control Circuitry for Four DGs Replaced
page: https://kanterella.com/05000369/LER-2D1994-2D007-2C_-3Aon_941024-2CDGs_1B_-26_2A_Experienced_Inadvertent_Starts_Due_to_Unanticipated_Interaction_of_Components._Struthers_Dunn_219DXBP_Type_Relays_Used_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000369/LER-1994-007, :on 941024,DGs 1B & 2A Experienced Inadvertent Starts Due to Unanticipated Interaction of Components. Struthers Dunn 219DXBP Type Relays Used in DG Control Circuitry for Four DGs Replaced

LER-1995-002-01, :on 950313,spurious Train B Control Room Emergency Habitability Sys Actuation Generated.Caused by Unintentional Electrical Shorting Across Adjacent Terminal Screws.Air Bottle Subsystem Isolated
type: Subject
label: 05000412/LER-1995-002-01, :on 950313,spurious Train B Control Room Emergency Habitability Sys Actuation Generated.Caused by Unintentional Electrical Shorting Across Adjacent Terminal Screws.Air Bottle Subsystem Isolated
page: https://kanterella.com/05000412/LER-2D1995-2D002-2D01-2C_-3Aon_950313-2Cspurious_Train_B_Control_Room_Emergency_Habitability_Sys_Actuation_Generated.Caused_by_Unintentional_Electrical_Shorting_Across_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000412/LER-1995-002-01, :on 950313,spurious Train B Control Room Emergency Habitability Sys Actuation Generated.Caused by Unintentional Electrical Shorting Across Adjacent Terminal Screws.Air Bottle Subsystem Isolated

05000423/LER-1995-009, :on 950426, as Found Leak Rate for Containment Isolation Valves Exceeded TS Bypass Leakage Limit.Caused by Deterioration of Resilient Valve Seats.Seats Continue to Be Replaced
type: Subject
page: https://kanterella.com/05000423/LER-2D1995-2D009-2C_-3Aon_950426-2C_as_Found_Leak_Rate_for_Containment_Isolation_Valves_Exceeded_TS_Bypass_Leakage_Limit.Caused_by_Deterioration_of_Resilient_Valve_Seat…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000423/LER-1995-009, :on 950426, as Found Leak Rate for Containment Isolation Valves Exceeded TS Bypass Leakage Limit.Caused by Deterioration of Resilient Valve Seats.Seats Continue to Be Replaced

LER-1995-001, :on 950125,ESG Actuation Occurred During Performance of Surveillance Test Procedure.Cause Could Not Be Determined.Isolation Had Been Reset & Steam Supply Valve Opened After Event
type: Subject
label: 05000458/LER-1995-001, :on 950125,ESG Actuation Occurred During Performance of Surveillance Test Procedure.Cause Could Not Be Determined.Isolation Had Been Reset & Steam Supply Valve Opened After Event
page: https://kanterella.com/05000458/LER-2D1995-2D001-2C_-3Aon_950125-2CESG_Actuation_Occurred_During_Performance_of_Surveillance_Test_Procedure.Cause_Could_Not_Be_Determined.Isolation_Had_Been_Reset_-26_S…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000458/LER-1995-001, :on 950125,ESG Actuation Occurred During Performance of Surveillance Test Procedure.Cause Could Not Be Determined.Isolation Had Been Reset & Steam Supply Valve Opened After Event

LER-1995-001, :on 950118,crane Operated Over Spent Fuel Pool While Enclosure Bldg Ventilation Sys Inoperable.Caused by Inadequate or Insufficient Procedures.Ts 3.9.7,3.9.14 & 3.19.15 Will Be Reviewed for Clarifications
type: Subject
label: 05000336/LER-1995-001, :on 950118,crane Operated Over Spent Fuel Pool While Enclosure Bldg Ventilation Sys Inoperable.Caused by Inadequate or Insufficient Procedures.Ts 3.9.7,3.9.14 & 3.19.15 Will Be Reviewed for Clarifications
page: https://kanterella.com/05000336/LER-2D1995-2D001-2C_-3Aon_950118-2Ccrane_Operated_Over_Spent_Fuel_Pool_While_Enclosure_Bldg_Ventilation_Sys_Inoperable.Caused_by_Inadequate_or_Insufficient_Procedures.T…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1995-001, :on 950118,crane Operated Over Spent Fuel Pool While Enclosure Bldg Ventilation Sys Inoperable.Caused by Inadequate or Insufficient Procedures.Ts 3.9.7,3.9.14 & 3.19.15 Will Be Reviewed for Clarifications

LER-1994-033, :on 941031,loss of Containment Integrity Discovered During Course of Irradiated Fuel Movement within Containment.Caused by Failed Ventilation Exhaust Damper.Fuel Movement Stopped
type: Subject
label: 05000336/LER-1994-033, :on 941031,loss of Containment Integrity Discovered During Course of Irradiated Fuel Movement within Containment.Caused by Failed Ventilation Exhaust Damper.Fuel Movement Stopped
page: https://kanterella.com/05000336/LER-2D1994-2D033-2C_-3Aon_941031-2Closs_of_Containment_Integrity_Discovered_During_Course_of_Irradiated_Fuel_Movement_within_Containment.Caused_by_Failed_Ventilation_Ex…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1994-033, :on 941031,loss of Containment Integrity Discovered During Course of Irradiated Fuel Movement within Containment.Caused by Failed Ventilation Exhaust Damper.Fuel Movement Stopped

05000336/LER-1994-032, :on 941028,post Incident Recirculation Fan Flow Below Design Occurred.Cause Unknown.Work Scheduled to Adjust Fan Blades as Necessary to Achieve Required Air Flow Rate.W/
type: Subject
page: https://kanterella.com/05000336/LER-2D1994-2D032-2C_-3Aon_941028-2Cpost_Incident_Recirculation_Fan_Flow_Below_Design_Occurred.Cause_Unknown.Work_Scheduled_to_Adjust_Fan_Blades_as_Necessary_to_Achieve_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1994-032, :on 941028,post Incident Recirculation Fan Flow Below Design Occurred.Cause Unknown.Work Scheduled to Adjust Fan Blades as Necessary to Achieve Required Air Flow Rate.W/

05000293/LER-1994-007, :on 941228,primary Containment Pressure Boundary Degraded Due to Uninstalled Instrument Plug.Caused by Personnel Error.Isolation Valves Will Be Installed on Selected Instruments
type: Subject
page: https://kanterella.com/05000293/LER-2D1994-2D007-2C_-3Aon_941228-2Cprimary_Containment_Pressure_Boundary_Degraded_Due_to_Uninstalled_Instrument_Plug.Caused_by_Personnel_Error.Isolation_Valves_Will_Be_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1994-007, :on 941228,primary Containment Pressure Boundary Degraded Due to Uninstalled Instrument Plug.Caused by Personnel Error.Isolation Valves Will Be Installed on Selected Instruments

05000285/LER-1994-011, :on 941228,SR for SG Level Check Was Unsatisfied.Caused by Inadequate Review.Dept Personnel Trained on Event
type: Subject
page: https://kanterella.com/05000285/LER-2D1994-2D011-2C_-3Aon_941228-2CSR_for_SG_Level_Check_Was_Unsatisfied.Caused_by_Inadequate_Review.Dept_Personnel_Trained_on_Event
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1994-011, :on 941228,SR for SG Level Check Was Unsatisfied.Caused by Inadequate Review.Dept Personnel Trained on Event

Design Review of Manhole Covers.Info Action Statement for AP-41,Severe Weather Conditions Was Entered at 1045 Hr on 941215
type: Subject
label: 05000338/LER-1994-008-02, :on 941215,inadequate Missile Protection Due to Incomplete Procurement/Design Review of Manhole Covers.Info Action Statement for AP-41,Severe Weather Conditions Was Entered at 1045 Hr on 941215
page: https://kanterella.com/05000338/LER-2D1994-2D008-2D02-2C_-3Aon_941215-2Cinadequate_Missile_Protection_Due_to_Incomplete_Procurement/Design_Review_of_Manhole_Covers.Info_Action_Statement_for_AP-2D41-2C…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000338/LER-1994-008-02, :on 941215,inadequate Missile Protection Due to Incomplete Procurement/Design Review of Manhole Covers.Info Action Statement for AP-41,Severe Weather Conditions Was Entered at 1045 Hr on 941215

05000369/LER-1994-009, :on 941125,boron Dilution of Unit 1 VCT Occurred Due to Procedural Deficiencies Caused by Inadequate Self Checking.Procedure CP/0/A/8400/10 Placed on Administrative Hold
type: Subject
page: https://kanterella.com/05000369/LER-2D1994-2D009-2C_-3Aon_941125-2Cboron_Dilution_of_Unit_1_VCT_Occurred_Due_to_Procedural_Deficiencies_Caused_by_Inadequate_Self_Checking.Procedure_CP/0/A/8400/10_Plac…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000369/LER-1994-009, :on 941125,boron Dilution of Unit 1 VCT Occurred Due to Procedural Deficiencies Caused by Inadequate Self Checking.Procedure CP/0/A/8400/10 Placed on Administrative Hold

LER-1994-014-02, :on 941121,TDAFWP Failed to Start During Cold Start Surveillance Test.Caused by Preexisting Conditions of Tdafwp Trip Valve Linkage.Corrective Maintenance Performed on Linkage
type: Subject
label: 05000423/LER-1994-014-02, :on 941121,TDAFWP Failed to Start During Cold Start Surveillance Test.Caused by Preexisting Conditions of Tdafwp Trip Valve Linkage.Corrective Maintenance Performed on Linkage
page: https://kanterella.com/05000423/LER-2D1994-2D014-2D02-2C_-3Aon_941121-2CTDAFWP_Failed_to_Start_During_Cold_Start_Surveillance_Test.Caused_by_Preexisting_Conditions_of_Tdafwp_Trip_Valve_Linkage.Correct…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000423/LER-1994-014-02, :on 941121,TDAFWP Failed to Start During Cold Start Surveillance Test.Caused by Preexisting Conditions of Tdafwp Trip Valve Linkage.Corrective Maintenance Performed on Linkage

LER-1991-001, :on 910224,discovered That Hot Leg Safety Injection Branch Flow Above Tech Spec Requirements of Less than or Equal to 650 Gpm.Caused by Errors in Flow Measurements.Throttle Valves Adjusted
type: Subject
label: 05000338/LER-1991-001, :on 910224,discovered That Hot Leg Safety Injection Branch Flow Above Tech Spec Requirements of Less than or Equal to 650 Gpm.Caused by Errors in Flow Measurements.Throttle Valves Adjusted
page: https://kanterella.com/05000338/LER-2D1991-2D001-2C_-3Aon_910224-2Cdiscovered_That_Hot_Leg_Safety_Injection_Branch_Flow_Above_Tech_Spec_Requirements_of_Less_than_or_Equal_to_650_Gpm.Caused_by_Errors_i…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000338/LER-1991-001, :on 910224,discovered That Hot Leg Safety Injection Branch Flow Above Tech Spec Requirements of Less than or Equal to 650 Gpm.Caused by Errors in Flow Measurements.Throttle Valves Adjusted

LER-1994-002, :on 940117,spurious Div 1 RCIC Isolation Signal Received,Closing Inboard Steamline Isolation Valve 2-E51-F007.Cause Unknown.Steam Leak Detection Sys Will Be Replaced During Refueling Outage
type: Subject
label: 05000324/LER-1994-002, :on 940117,spurious Div 1 RCIC Isolation Signal Received,Closing Inboard Steamline Isolation Valve 2-E51-F007.Cause Unknown.Steam Leak Detection Sys Will Be Replaced During Refueling Outage
page: https://kanterella.com/05000324/LER-2D1994-2D002-2C_-3Aon_940117-2Cspurious_Div_1_RCIC_Isolation_Signal_Received-2CClosing_Inboard_Steamline_Isolation_Valve_2-2DE51-2DF007.Cause_Unknown.Steam_Leak_Det…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000324/LER-1994-002, :on 940117,spurious Div 1 RCIC Isolation Signal Received,Closing Inboard Steamline Isolation Valve 2-E51-F007.Cause Unknown.Steam Leak Detection Sys Will Be Replaced During Refueling Outage

LER-1994-003-01, :on 940711,commenced Reactor Shutdown for Leak from Fatigue Crack in SIT Line.Support for Line Redesigned & Installed to Reduced Levels of Vibration to Acceptable Level & Similar Lines Examined
type: Subject
label: 05000318/LER-1994-003-01, :on 940711,commenced Reactor Shutdown for Leak from Fatigue Crack in SIT Line.Support for Line Redesigned & Installed to Reduced Levels of Vibration to Acceptable Level & Similar Lines Examined
page: https://kanterella.com/05000318/LER-2D1994-2D003-2D01-2C_-3Aon_940711-2Ccommenced_Reactor_Shutdown_for_Leak_from_Fatigue_Crack_in_SIT_Line.Support_for_Line_Redesigned_-26_Installed_to_Reduced_Levels_o…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000318/LER-1994-003-01, :on 940711,commenced Reactor Shutdown for Leak from Fatigue Crack in SIT Line.Support for Line Redesigned & Installed to Reduced Levels of Vibration to Acceptable Level & Similar Lines Examined

LER-1994-003-03, :on 940623,discovered That Failure of an Air Pressure Regulator Resulted in Kh Main Transformer Lockout Relay Actuation.Caused by Design Deficiency.Repaired Affected Air System Components
type: Subject
label: 05000269/LER-1994-003-03, :on 940623,discovered That Failure of an Air Pressure Regulator Resulted in Kh Main Transformer Lockout Relay Actuation.Caused by Design Deficiency.Repaired Affected Air System Components
page: https://kanterella.com/05000269/LER-2D1994-2D003-2D03-2C_-3Aon_940623-2Cdiscovered_That_Failure_of_an_Air_Pressure_Regulator_Resulted_in_Kh_Main_Transformer_Lockout_Relay_Actuation.Caused_by_Design_De…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000269/LER-1994-003-03, :on 940623,discovered That Failure of an Air Pressure Regulator Resulted in Kh Main Transformer Lockout Relay Actuation.Caused by Design Deficiency.Repaired Affected Air System Components

LER-1991-009, :on 910321,automatic Isolation of Steam Generator Blowdown Occurred.Caused by Cognitive Personnel Error & Inadequate Procedural Guidance.Operations Shift Crew Counselled & Procedure Revised
type: Subject
label: 05000445/LER-1991-009, :on 910321,automatic Isolation of Steam Generator Blowdown Occurred.Caused by Cognitive Personnel Error & Inadequate Procedural Guidance.Operations Shift Crew Counselled & Procedure Revised
page: https://kanterella.com/05000445/LER-2D1991-2D009-2C_-3Aon_910321-2Cautomatic_Isolation_of_Steam_Generator_Blowdown_Occurred.Caused_by_Cognitive_Personnel_Error_-26_Inadequate_Procedural_Guidance.Opera…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000445/LER-1991-009, :on 910321,automatic Isolation of Steam Generator Blowdown Occurred.Caused by Cognitive Personnel Error & Inadequate Procedural Guidance.Operations Shift Crew Counselled & Procedure Revised

LER-1994-004, :on 940413,fire Damper Designed to Retain Halon in Cable Spread Room in Event of Fire Was Found Improperly Latched Open.Caused by Personnel Error.Corrective Actions: Event Consequences Related to Personnel
type: Subject
label: 05000285/LER-1994-004, :on 940413,fire Damper Designed to Retain Halon in Cable Spread Room in Event of Fire Was Found Improperly Latched Open.Caused by Personnel Error.Corrective Actions: Event Consequences Related to Personnel
page: https://kanterella.com/05000285/LER-2D1994-2D004-2C_-3Aon_940413-2Cfire_Damper_Designed_to_Retain_Halon_in_Cable_Spread_Room_in_Event_of_Fire_Was_Found_Improperly_Latched_Open.Caused_by_Personnel_Erro…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1994-004, :on 940413,fire Damper Designed to Retain Halon in Cable Spread Room in Event of Fire Was Found Improperly Latched Open.Caused by Personnel Error.Corrective Actions: Event Consequences Related to Personnel

Turbine Bldg Ventilation Radiation Monitor 1-RM-90-250 Did Not Contain Particulate Filter & Charcoal Cartridge.Caused by Personnel Error.Filter Holder Assembly Replaced
type: Subject
label: 05000259/LER-1991-002-01, :on 910201,discovered That Reactor/Turbine Bldg Ventilation Radiation Monitor 1-RM-90-250 Did Not Contain Particulate Filter & Charcoal Cartridge.Caused by Personnel Error.Filter Holder Assembly Replaced
page: https://kanterella.com/05000259/LER-2D1991-2D002-2D01-2C_-3Aon_910201-2Cdiscovered_That_Reactor/Turbine_Bldg_Ventilation_Radiation_Monitor_1-2DRM-2D90-2D250_Did_Not_Contain_Particulate_Filter_-26_Char…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000259/LER-1991-002-01, :on 910201,discovered That Reactor/Turbine Bldg Ventilation Radiation Monitor 1-RM-90-250 Did Not Contain Particulate Filter & Charcoal Cartridge.Caused by Personnel Error.Filter Holder Assembly Replaced

05000336/LER-1994-018-01, :on 940602,filter Fans Crac Appeared to Be Feeding Opposite Supply Train.Caused by Incorrect Installation of Crac Sys.Plant Design Change 2 Was Implemented on 940605
type: Subject
page: https://kanterella.com/05000336/LER-2D1994-2D018-2D01-2C_-3Aon_940602-2Cfilter_Fans_Crac_Appeared_to_Be_Feeding_Opposite_Supply_Train.Caused_by_Incorrect_Installation_of_Crac_Sys.Plant_Design_Change_2…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1994-018-01, :on 940602,filter Fans Crac Appeared to Be Feeding Opposite Supply Train.Caused by Incorrect Installation of Crac Sys.Plant Design Change 2 Was Implemented on 940605

Inadequate Controls & Methods.Shielding Was Removed
type: Subject
label: 05000336/LER-1994-021-01, :on 940615,determined That Shielding Had Been Installed Without Processing Temporary Shielding Request.Caused by Bricks Installed W/Inadequate Controls & Methods.Shielding Was Removed
page: https://kanterella.com/05000336/LER-2D1994-2D021-2D01-2C_-3Aon_940615-2Cdetermined_That_Shielding_Had_Been_Installed_Without_Processing_Temporary_Shielding_Request.Caused_by_Bricks_Installed_W/Inadequ…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1994-021-01, :on 940615,determined That Shielding Had Been Installed Without Processing Temporary Shielding Request.Caused by Bricks Installed W/Inadequate Controls & Methods.Shielding Was Removed

05000317/LER-1994-005, :on 940424,experienced Partial Loss of Offsite Power.Caused by 13.8 Kv Voltage Regulator Fault.Voltage Regulator 1102 Replaced
type: Subject
page: https://kanterella.com/05000317/LER-2D1994-2D005-2C_-3Aon_940424-2Cexperienced_Partial_Loss_of_Offsite_Power.Caused_by_13.8_Kv_Voltage_Regulator_Fault.Voltage_Regulator_1102_Replaced
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000317/LER-1994-005, :on 940424,experienced Partial Loss of Offsite Power.Caused by 13.8 Kv Voltage Regulator Fault.Voltage Regulator 1102 Replaced

05000285/LER-1994-005, :on 940427,found That out-of-tolerance Test Results for Snubbers Not Appropriately Addressed Due to Procedural Inadequacy.Snubber Surveillance Test Procedure Will Be Revised
type: Subject
page: https://kanterella.com/05000285/LER-2D1994-2D005-2C_-3Aon_940427-2Cfound_That_out-2Dof-2Dtolerance_Test_Results_for_Snubbers_Not_Appropriately_Addressed_Due_to_Procedural_Inadequacy.Snubber_Surveillan…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1994-005, :on 940427,found That out-of-tolerance Test Results for Snubbers Not Appropriately Addressed Due to Procedural Inadequacy.Snubber Surveillance Test Procedure Will Be Revised

LER-1994-005, :on 940423,Full RPS & Partial Group 2 PCIS Actuation Occurred.Caused by Inadvertent Action on Part of I&C Technician.Rps Signal Reset & Affected Sys Returned to Lineups Required for Plant Conditions
type: Subject
label: 05000366/LER-1994-005, :on 940423,Full RPS & Partial Group 2 PCIS Actuation Occurred.Caused by Inadvertent Action on Part of I&C Technician.Rps Signal Reset & Affected Sys Returned to Lineups Required for Plant Conditions
page: https://kanterella.com/05000366/LER-2D1994-2D005-2C_-3Aon_940423-2CFull_RPS_-26_Partial_Group_2_PCIS_Actuation_Occurred.Caused_by_Inadvertent_Action_on_Part_of_I-26C_Technician.Rps_Signal_Reset_-26_Af…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000366/LER-1994-005, :on 940423,Full RPS & Partial Group 2 PCIS Actuation Occurred.Caused by Inadvertent Action on Part of I&C Technician.Rps Signal Reset & Affected Sys Returned to Lineups Required for Plant Conditions

05000285/LER-1994-001, :on 940211,safeguards Actuation & Reactor Trip Occurred Due to Relay Failure.Containment Pressure High Signal Relay Replaced & Sent for Investigation of Failure Mechanism
type: Subject
page: https://kanterella.com/05000285/LER-2D1994-2D001-2C_-3Aon_940211-2Csafeguards_Actuation_-26_Reactor_Trip_Occurred_Due_to_Relay_Failure.Containment_Pressure_High_Signal_Relay_Replaced_-26_Sent_for_Inve…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1994-001, :on 940211,safeguards Actuation & Reactor Trip Occurred Due to Relay Failure.Containment Pressure High Signal Relay Replaced & Sent for Investigation of Failure Mechanism

05000285/LER-1993-019, :on 931209,AFW Pumps Rendered Inoperable Due to Inappropriate Testing Lineup.Surveillance Test SE-ST-AFW-3005 Will Be Revised
type: Subject
page: https://kanterella.com/05000285/LER-2D1993-2D019-2C_-3Aon_931209-2CAFW_Pumps_Rendered_Inoperable_Due_to_Inappropriate_Testing_Lineup.Surveillance_Test_SE-2DST-2DAFW-2D3005_Will_Be_Revised
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1993-019, :on 931209,AFW Pumps Rendered Inoperable Due to Inappropriate Testing Lineup.Surveillance Test SE-ST-AFW-3005 Will Be Revised

05000285/LER-1993-014, :on 930926,PORV PCV-102-1 Inadvertently Opened During Test.Caused by Improper Valve Maint During 1984 Mod. C/A:Pcv Refurbished & Tested
type: Subject
page: https://kanterella.com/05000285/LER-2D1993-2D014-2C_-3Aon_930926-2CPORV_PCV-2D102-2D1_Inadvertently_Opened_During_Test.Caused_by_Improper_Valve_Maint_During_1984_Mod._C/A-3APcv_Refurbished_-26_Tested
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1993-014, :on 930926,PORV PCV-102-1 Inadvertently Opened During Test.Caused by Improper Valve Maint During 1984 Mod. C/A:Pcv Refurbished & Tested

3TD 10 Amp Dc Fuse Block Reconfigured
type: Subject
label: 05000269/LER-1993-009-01, :on 930927,determined That Epsl Channel 1 Not Operable Per TS in Past as Result of Design & Installation Deficiencies in Load Shed Circuitry.Wiring Associated w/3TD 10 Amp Dc Fuse Block Reconfigured
page: https://kanterella.com/05000269/LER-2D1993-2D009-2D01-2C_-3Aon_930927-2Cdetermined_That_Epsl_Channel_1_Not_Operable_Per_TS_in_Past_as_Result_of_Design_-26_Installation_Deficiencies_in_Load_Shed_Circui…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000269/LER-1993-009-01, :on 930927,determined That Epsl Channel 1 Not Operable Per TS in Past as Result of Design & Installation Deficiencies in Load Shed Circuitry.Wiring Associated w/3TD 10 Amp Dc Fuse Block Reconfigured

LER-1994-002-01, :on 940301,during Monthly Operability Test of HPCI Thrust Bearing Temp Increased to 437 F & Decreased Below 200 F.Caused by Mfg Error in Thrust Bearing Housing. Failed Bearing & Gear Coupling Replaced
type: Subject
label: 05000366/LER-1994-002-01, :on 940301,during Monthly Operability Test of HPCI Thrust Bearing Temp Increased to 437 F & Decreased Below 200 F.Caused by Mfg Error in Thrust Bearing Housing. Failed Bearing & Gear Coupling Replaced
page: https://kanterella.com/05000366/LER-2D1994-2D002-2D01-2C_-3Aon_940301-2Cduring_Monthly_Operability_Test_of_HPCI_Thrust_Bearing_Temp_Increased_to_437_F_-26_Decreased_Below_200_F.Caused_by_Mfg_Error_in_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000366/LER-1994-002-01, :on 940301,during Monthly Operability Test of HPCI Thrust Bearing Temp Increased to 437 F & Decreased Below 200 F.Caused by Mfg Error in Thrust Bearing Housing. Failed Bearing & Gear Coupling Replaced

05000412/LER-1990-018, :on 901026,ESF Actuation - Inadvertent Diesel Start Occurred & Deficiency Discovered in D/G Ventilation Fan Circuit
type: Subject
page: https://kanterella.com/05000412/LER-2D1990-2D018-2C_-3Aon_901026-2CESF_Actuation_-2D_Inadvertent_Diesel_Start_Occurred_-26_Deficiency_Discovered_in_D/G_Ventilation_Fan_Circuit
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000412/LER-1990-018, :on 901026,ESF Actuation - Inadvertent Diesel Start Occurred & Deficiency Discovered in D/G Ventilation Fan Circuit

Pump Back in Svc
type: Subject
label: 05000423/LER-1994-005, :on 940210,containment Drain Sump Level & Pumped Captivity Monitoring Sys Not Performing in Accordance W/Ts.Caused by Personnel Error.After Design & Procedural Improvements,Original Sump/Pump Back in Svc
page: https://kanterella.com/05000423/LER-2D1994-2D005-2C_-3Aon_940210-2Ccontainment_Drain_Sump_Level_-26_Pumped_Captivity_Monitoring_Sys_Not_Performing_in_Accordance_W/Ts.Caused_by_Personnel_Error.After_De…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000423/LER-1994-005, :on 940210,containment Drain Sump Level & Pumped Captivity Monitoring Sys Not Performing in Accordance W/Ts.Caused by Personnel Error.After Design & Procedural Improvements,Original Sump/Pump Back in Svc

LER-1994-001-02, :on 940120,discovered That Overtemp Delta T & Overpower Delta T Channel Checks Not Being Adequately Performed Due to Procedural Deficiency.Channel Check on Four Delta T Channels Performed
type: Subject
label: 05000423/LER-1994-001-02, :on 940120,discovered That Overtemp Delta T & Overpower Delta T Channel Checks Not Being Adequately Performed Due to Procedural Deficiency.Channel Check on Four Delta T Channels Performed
page: https://kanterella.com/05000423/LER-2D1994-2D001-2D02-2C_-3Aon_940120-2Cdiscovered_That_Overtemp_Delta_T_-26_Overpower_Delta_T_Channel_Checks_Not_Being_Adequately_Performed_Due_to_Procedural_Deficienc…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000423/LER-1994-001-02, :on 940120,discovered That Overtemp Delta T & Overpower Delta T Channel Checks Not Being Adequately Performed Due to Procedural Deficiency.Channel Check on Four Delta T Channels Performed

05000416/LER-1993-010, :on 931004,loss of Shutdown Cooling & ESF Actuation Occurred During Unit Outage Due to Class 1E Bus Voltage Oscillations.Replaced Faulty Current Limiting Card
type: Subject
page: https://kanterella.com/05000416/LER-2D1993-2D010-2C_-3Aon_931004-2Closs_of_Shutdown_Cooling_-26_ESF_Actuation_Occurred_During_Unit_Outage_Due_to_Class_1E_Bus_Voltage_Oscillations.Replaced_Faulty_Curre…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000416/LER-1993-010, :on 931004,loss of Shutdown Cooling & ESF Actuation Occurred During Unit Outage Due to Class 1E Bus Voltage Oscillations.Replaced Faulty Current Limiting Card

05000445/LER-1990-029, :on 900910,turbine/reactor Trip Caused by Failure of Personnel to Assure Availability of Drain Path. Operators Responded to Trip Per EOP & Stabilized Plant in Mode 3
type: Subject
page: https://kanterella.com/05000445/LER-2D1990-2D029-2C_-3Aon_900910-2Cturbine/reactor_Trip_Caused_by_Failure_of_Personnel_to_Assure_Availability_of_Drain_Path._Operators_Responded_to_Trip_Per_EOP_-26_Sta…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000445/LER-1990-029, :on 900910,turbine/reactor Trip Caused by Failure of Personnel to Assure Availability of Drain Path. Operators Responded to Trip Per EOP & Stabilized Plant in Mode 3

05000445/LER-1990-033, :on 900926,personnel Error Lead to Momentary Loss of Containment Integrity
type: Subject
page: https://kanterella.com/05000445/LER-2D1990-2D033-2C_-3Aon_900926-2Cpersonnel_Error_Lead_to_Momentary_Loss_of_Containment_Integrity
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000445/LER-1990-033, :on 900926,personnel Error Lead to Momentary Loss of Containment Integrity

LER-1993-004-10, :on 931208,notified of Potential Inoperability of AFW Switchover Due to Inadequate Design Change.Temporary Alteration Installed to Move Feeds for 4 Seconds SW Switchover Time Delay Relay
type: Subject
label: 05000454/LER-1993-004-10, :on 931208,notified of Potential Inoperability of AFW Switchover Due to Inadequate Design Change.Temporary Alteration Installed to Move Feeds for 4 Seconds SW Switchover Time Delay Relay
page: https://kanterella.com/05000454/LER-2D1993-2D004-2D10-2C_-3Aon_931208-2Cnotified_of_Potential_Inoperability_of_AFW_Switchover_Due_to_Inadequate_Design_Change.Temporary_Alteration_Installed_to_Move_Fee…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000454/LER-1993-004-10, :on 931208,notified of Potential Inoperability of AFW Switchover Due to Inadequate Design Change.Temporary Alteration Installed to Move Feeds for 4 Seconds SW Switchover Time Delay Relay

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 306A
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

05000455/LER-1993-006-08, :on 930924,identified That Surveillance for Source Range Instrumentation Missed Due to Incorrect Computer Status Update.Changes Made to Update Process.W/
type: Subject
page: https://kanterella.com/05000455/LER-2D1993-2D006-2D08-2C_-3Aon_930924-2Cidentified_That_Surveillance_for_Source_Range_Instrumentation_Missed_Due_to_Incorrect_Computer_Status_Update.Changes_Made_to_Upd…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000455/LER-1993-006-08, :on 930924,identified That Surveillance for Source Range Instrumentation Missed Due to Incorrect Computer Status Update.Changes Made to Update Process.W/

LER-1993-022, :on 930910,simultaneous Loss of Preferred Offsite Power & Automatic Scram Resulting from Load Rejection Occurred.Caused by Load Rejection.Switchyard Walked Down for Evidence of Damage
type: Subject
label: 05000293/LER-1993-022, :on 930910,simultaneous Loss of Preferred Offsite Power & Automatic Scram Resulting from Load Rejection Occurred.Caused by Load Rejection.Switchyard Walked Down for Evidence of Damage
page: https://kanterella.com/05000293/LER-2D1993-2D022-2C_-3Aon_930910-2Csimultaneous_Loss_of_Preferred_Offsite_Power_-26_Automatic_Scram_Resulting_from_Load_Rejection_Occurred.Caused_by_Load_Rejection.Swit…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1993-022, :on 930910,simultaneous Loss of Preferred Offsite Power & Automatic Scram Resulting from Load Rejection Occurred.Caused by Load Rejection.Switchyard Walked Down for Evidence of Damage

LER-1993-017, :on 931116,time Delay Relays for Offsite Power Low Signal (Opls) Found Out of Tolerence Due to Inadequate Technical Review of Calibr Procedures for Opls Circuitry. Opls Calibr Procedures Revised
type: Subject
label: 05000285/LER-1993-017, :on 931116,time Delay Relays for Offsite Power Low Signal (Opls) Found Out of Tolerence Due to Inadequate Technical Review of Calibr Procedures for Opls Circuitry. Opls Calibr Procedures Revised
page: https://kanterella.com/05000285/LER-2D1993-2D017-2C_-3Aon_931116-2Ctime_Delay_Relays_for_Offsite_Power_Low_Signal_-28Opls-29_Found_Out_of_Tolerence_Due_to_Inadequate_Technical_Review_of_Calibr_Procedu…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1993-017, :on 931116,time Delay Relays for Offsite Power Low Signal (Opls) Found Out of Tolerence Due to Inadequate Technical Review of Calibr Procedures for Opls Circuitry. Opls Calibr Procedures Revised

Engineering Personnel
type: Subject
label: 05000213/LER-1993-016, :on 930920,determined That Potential Existed to Divert Inventory from Dwst.Issue of Thoroughness in Engineering Analyses & Evaluations Will Be Addressed by Reviewing Event W/Engineering Personnel
page: https://kanterella.com/05000213/LER-2D1993-2D016-2C_-3Aon_930920-2Cdetermined_That_Potential_Existed_to_Divert_Inventory_from_Dwst.Issue_of_Thoroughness_in_Engineering_Analyses_-26_Evaluations_Will_Be…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000213/LER-1993-016, :on 930920,determined That Potential Existed to Divert Inventory from Dwst.Issue of Thoroughness in Engineering Analyses & Evaluations Will Be Addressed by Reviewing Event W/Engineering Personnel

05000285/LER-1993-015, :on 931109,emergency Boration of RCS Was Initiated Due to Induced Electrical Noise.Performed Maint on WR Nuclear Instrumentation Channels a & D
type: Subject
page: https://kanterella.com/05000285/LER-2D1993-2D015-2C_-3Aon_931109-2Cemergency_Boration_of_RCS_Was_Initiated_Due_to_Induced_Electrical_Noise.Performed_Maint_on_WR_Nuclear_Instrumentation_Channels_a_-26_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1993-015, :on 931109,emergency Boration of RCS Was Initiated Due to Induced Electrical Noise.Performed Maint on WR Nuclear Instrumentation Channels a & D

LER-1993-016, :on 931113,CEA Withdrew from Reactor Core & Rod 31 Became Fully Withdrawn.Caused by Lack of Ground Detection Sys for Associated Power Supplies.Ground Detection for CRD Power Supply Installed
type: Subject
label: 05000285/LER-1993-016, :on 931113,CEA Withdrew from Reactor Core & Rod 31 Became Fully Withdrawn.Caused by Lack of Ground Detection Sys for Associated Power Supplies.Ground Detection for CRD Power Supply Installed
page: https://kanterella.com/05000285/LER-2D1993-2D016-2C_-3Aon_931113-2CCEA_Withdrew_from_Reactor_Core_-26_Rod_31_Became_Fully_Withdrawn.Caused_by_Lack_of_Ground_Detection_Sys_for_Associated_Power_Supplies…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1993-016, :on 931113,CEA Withdrew from Reactor Core & Rod 31 Became Fully Withdrawn.Caused by Lack of Ground Detection Sys for Associated Power Supplies.Ground Detection for CRD Power Supply Installed

LER-1993-021, :on 930824,unplanned Automatic Actuation of RCIC Portion of PCIS Occurred Due to RCIC Turbine Steam Supply Line High Flow Signal.Personnel Will Evaluate Setpoint for RCIC Sys High Steam Flow
type: Subject
label: 05000293/LER-1993-021, :on 930824,unplanned Automatic Actuation of RCIC Portion of PCIS Occurred Due to RCIC Turbine Steam Supply Line High Flow Signal.Personnel Will Evaluate Setpoint for RCIC Sys High Steam Flow
page: https://kanterella.com/05000293/LER-2D1993-2D021-2C_-3Aon_930824-2Cunplanned_Automatic_Actuation_of_RCIC_Portion_of_PCIS_Occurred_Due_to_RCIC_Turbine_Steam_Supply_Line_High_Flow_Signal.Personnel_Will_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1993-021, :on 930824,unplanned Automatic Actuation of RCIC Portion of PCIS Occurred Due to RCIC Turbine Steam Supply Line High Flow Signal.Personnel Will Evaluate Setpoint for RCIC Sys High Steam Flow

LER-1993-011, :on 931111,control Bldg Chiller a Tripped During Normal Operation While Chiller B Removed from Svc for Preplanned Maint.Caused by Ineffective Setup for Low Load Conditions.Chillers Rebalanced
type: Subject
label: 05000331/LER-1993-011, :on 931111,control Bldg Chiller a Tripped During Normal Operation While Chiller B Removed from Svc for Preplanned Maint.Caused by Ineffective Setup for Low Load Conditions.Chillers Rebalanced
page: https://kanterella.com/05000331/LER-2D1993-2D011-2C_-3Aon_931111-2Ccontrol_Bldg_Chiller_a_Tripped_During_Normal_Operation_While_Chiller_B_Removed_from_Svc_for_Preplanned_Maint.Caused_by_Ineffective_Se…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000331/LER-1993-011, :on 931111,control Bldg Chiller a Tripped During Normal Operation While Chiller B Removed from Svc for Preplanned Maint.Caused by Ineffective Setup for Low Load Conditions.Chillers Rebalanced

05000317/LER-1993-006, :on 931010,surveillance on Electrical Fire Pump Missed Due to Personnel Error.Pump Declared Inoperable & Missed Surveillance Performed
type: Subject
page: https://kanterella.com/05000317/LER-2D1993-2D006-2C_-3Aon_931010-2Csurveillance_on_Electrical_Fire_Pump_Missed_Due_to_Personnel_Error.Pump_Declared_Inoperable_-26_Missed_Surveillance_Performed
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000317/LER-1993-006, :on 931010,surveillance on Electrical Fire Pump Missed Due to Personnel Error.Pump Declared Inoperable & Missed Surveillance Performed

05000483/LER-1990-011, :on 901003,ESF Actuations Occurred Due to Spurious Signal on Fuel Bldg Radiation Monitor
type: Subject
page: https://kanterella.com/05000483/LER-2D1990-2D011-2C_-3Aon_901003-2CESF_Actuations_Occurred_Due_to_Spurious_Signal_on_Fuel_Bldg_Radiation_Monitor
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000483/LER-1990-011, :on 901003,ESF Actuations Occurred Due to Spurious Signal on Fuel Bldg Radiation Monitor

LER-1993-018, :on 930721,planned Shutdown Initiated Due to Unidentified Leakage of 3 Gpm.On 930722,planned Shutdown Became TS Required Shutdown When Insp Revealed Leakage to Be Rc Pressure Boundary Leakage.Leakage Repaired
type: Subject
label: 05000293/LER-1993-018, :on 930721,planned Shutdown Initiated Due to Unidentified Leakage of 3 Gpm.On 930722,planned Shutdown Became TS Required Shutdown When Insp Revealed Leakage to Be Rc Pressure Boundary Leakage.Leakage Repaired
page: https://kanterella.com/05000293/LER-2D1993-2D018-2C_-3Aon_930721-2Cplanned_Shutdown_Initiated_Due_to_Unidentified_Leakage_of_3_Gpm.On_930722-2Cplanned_Shutdown_Became_TS_Required_Shutdown_When_Insp_Re…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1993-018, :on 930721,planned Shutdown Initiated Due to Unidentified Leakage of 3 Gpm.On 930722,planned Shutdown Became TS Required Shutdown When Insp Revealed Leakage to Be Rc Pressure Boundary Leakage.Leakage Repaired

Control Channel B. Temporary Mod 92-078 & Standing Order 0-25 Revised
type: Subject
label: 05000285/LER-1993-004, :on 930301,confirmed That Channel D Axial Shape Index (Asi) Being Calculated in Reverse Since 921031-930301 Due to Drawing Discrepancies Associated W/Control Channel B. Temporary Mod 92-078 & Standing Order 0-25 Revised
page: https://kanterella.com/05000285/LER-2D1993-2D004-2C_-3Aon_930301-2Cconfirmed_That_Channel_D_Axial_Shape_Index_-28Asi-29_Being_Calculated_in_Reverse_Since_921031-2D930301_Due_to_Drawing_Discrepancies_A…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1993-004, :on 930301,confirmed That Channel D Axial Shape Index (Asi) Being Calculated in Reverse Since 921031-930301 Due to Drawing Discrepancies Associated W/Control Channel B. Temporary Mod 92-078 & Standing Order 0-25 Revised

05000318/LER-1993-003-01, :on 930625,SG Tripped Due to Low Water Level. Caused by Insufficient Feedwater Addition Due to Inadequate Communication.Reemphasis on Improved Communication Stressed
type: Subject
page: https://kanterella.com/05000318/LER-2D1993-2D003-2D01-2C_-3Aon_930625-2CSG_Tripped_Due_to_Low_Water_Level._Caused_by_Insufficient_Feedwater_Addition_Due_to_Inadequate_Communication.Reemphasis_on_Impro…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000318/LER-1993-003-01, :on 930625,SG Tripped Due to Low Water Level. Caused by Insufficient Feedwater Addition Due to Inadequate Communication.Reemphasis on Improved Communication Stressed

LER-1993-010, :on 930611,1 of 14 Halon Cylinders Did Not Meet Min Pressure Acceptance Criteria Listed in Semiannual Switchgear Rooms Surveillance Test.Caused by Failure of Test to Include Necessary Steps.Cylinder Recharged
type: Subject
label: 05000285/LER-1993-010, :on 930611,1 of 14 Halon Cylinders Did Not Meet Min Pressure Acceptance Criteria Listed in Semiannual Switchgear Rooms Surveillance Test.Caused by Failure of Test to Include Necessary Steps.Cylinder Recharged
page: https://kanterella.com/05000285/LER-2D1993-2D010-2C_-3Aon_930611-2C1_of_14_Halon_Cylinders_Did_Not_Meet_Min_Pressure_Acceptance_Criteria_Listed_in_Semiannual_Switchgear_Rooms_Surveillance_Test.Caused_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1993-010, :on 930611,1 of 14 Halon Cylinders Did Not Meet Min Pressure Acceptance Criteria Listed in Semiannual Switchgear Rooms Surveillance Test.Caused by Failure of Test to Include Necessary Steps.Cylinder Recharged

Access to Relays Will Be Reinforced
type: Subject
label: 05000317/LER-1993-003, :on 930610,dual Unit Trip Occurred Due to Partial Loss of Offsite Power.Flashover Protection Relay for Breaker 552-61 Replaced & Training for Personnel W/ Access to Relays Will Be Reinforced
page: https://kanterella.com/05000317/LER-2D1993-2D003-2C_-3Aon_930610-2Cdual_Unit_Trip_Occurred_Due_to_Partial_Loss_of_Offsite_Power.Flashover_Protection_Relay_for_Breaker_552-2D61_Replaced_-26_Training_fo…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000317/LER-1993-003, :on 930610,dual Unit Trip Occurred Due to Partial Loss of Offsite Power.Flashover Protection Relay for Breaker 552-61 Replaced & Training for Personnel W/ Access to Relays Will Be Reinforced

LER-1993-006, :on 930520,inadequately Secured Separation Barrier Identified That Could Affect Control Switches for safety-related Equipment on Main Control Board.Caused by Human Error.Placard Posted to Restrict Area
type: Subject
label: 05000302/LER-1993-006, :on 930520,inadequately Secured Separation Barrier Identified That Could Affect Control Switches for safety-related Equipment on Main Control Board.Caused by Human Error.Placard Posted to Restrict Area
page: https://kanterella.com/05000302/LER-2D1993-2D006-2C_-3Aon_930520-2Cinadequately_Secured_Separation_Barrier_Identified_That_Could_Affect_Control_Switches_for_safety-2Drelated_Equipment_on_Main_Control_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000302/LER-1993-006, :on 930520,inadequately Secured Separation Barrier Identified That Could Affect Control Switches for safety-related Equipment on Main Control Board.Caused by Human Error.Placard Posted to Restrict Area

LER-1993-008, :on 930520,determined That TS SR Not Satisfied for Stack Flow Indicator,Per Amend 137 Issued on 910307. Caused by Lack of Attention to Detail.Calibr & Functional Test Procedures Developed
type: Subject
label: 05000285/LER-1993-008, :on 930520,determined That TS SR Not Satisfied for Stack Flow Indicator,Per Amend 137 Issued on 910307. Caused by Lack of Attention to Detail.Calibr & Functional Test Procedures Developed
page: https://kanterella.com/05000285/LER-2D1993-2D008-2C_-3Aon_930520-2Cdetermined_That_TS_SR_Not_Satisfied_for_Stack_Flow_Indicator-2CPer_Amend_137_Issued_on_910307._Caused_by_Lack_of_Attention_to_Detail.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1993-008, :on 930520,determined That TS SR Not Satisfied for Stack Flow Indicator,Per Amend 137 Issued on 910307. Caused by Lack of Attention to Detail.Calibr & Functional Test Procedures Developed

Personnel Re Attention to Detail
type: Subject
label: 05000293/LER-1993-010, :on 930519,SUT Became de-energized During Planned Calibr of Turbine/Generator Relays Lockout Test While Shut Down.Caused by Personnel Error.Discussion Conducted W/Personnel Re Attention to Detail
page: https://kanterella.com/05000293/LER-2D1993-2D010-2C_-3Aon_930519-2CSUT_Became_de-2Denergized_During_Planned_Calibr_of_Turbine/Generator_Relays_Lockout_Test_While_Shut_Down.Caused_by_Personnel_Error.Di…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1993-010, :on 930519,SUT Became de-energized During Planned Calibr of Turbine/Generator Relays Lockout Test While Shut Down.Caused by Personnel Error.Discussion Conducted W/Personnel Re Attention to Detail

LER-1993-007, :on 930430,unplanned Emergency Generator Start & RT Signal Occurred.Caused by Inadequate Attention to Detail,Labeling of Fuse Drawers,Caution Signs & Training. Labeling & Caution Signs Upgraded
type: Subject
label: 05000285/LER-1993-007, :on 930430,unplanned Emergency Generator Start & RT Signal Occurred.Caused by Inadequate Attention to Detail,Labeling of Fuse Drawers,Caution Signs & Training. Labeling & Caution Signs Upgraded
page: https://kanterella.com/05000285/LER-2D1993-2D007-2C_-3Aon_930430-2Cunplanned_Emergency_Generator_Start_-26_RT_Signal_Occurred.Caused_by_Inadequate_Attention_to_Detail-2CLabeling_of_Fuse_Drawers-2CCaut…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1993-007, :on 930430,unplanned Emergency Generator Start & RT Signal Occurred.Caused by Inadequate Attention to Detail,Labeling of Fuse Drawers,Caution Signs & Training. Labeling & Caution Signs Upgraded

Replacement of Halon Sys Piping.On 930427,individual Responsible for Fire Watch Not Present.Individual Relieved of Responsibilities
type: Subject
label: 05000285/LER-1993-006, :on 930118,Halon Fire Suppression Sys for Switchgear Rooms Disabled to Allow Repair/Replacement of Halon Sys Piping.On 930427,individual Responsible for Fire Watch Not Present.Individual Relieved of Responsibilities
page: https://kanterella.com/05000285/LER-2D1993-2D006-2C_-3Aon_930118-2CHalon_Fire_Suppression_Sys_for_Switchgear_Rooms_Disabled_to_Allow_Repair/Replacement_of_Halon_Sys_Piping.On_930427-2Cindividual_Respo…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1993-006, :on 930118,Halon Fire Suppression Sys for Switchgear Rooms Disabled to Allow Repair/Replacement of Halon Sys Piping.On 930427,individual Responsible for Fire Watch Not Present.Individual Relieved of Responsibilities

LER-1990-016, :on 900521,engineering Determined That Three Atmospheric Relief Valves Declared Inoperable Resulting in Entry Into Tech Spec Limiting Condition for Operation 3.0.3. Pneumatic Controls Drifted Out of Calibr
type: Subject
label: 05000445/LER-1990-016, :on 900521,engineering Determined That Three Atmospheric Relief Valves Declared Inoperable Resulting in Entry Into Tech Spec Limiting Condition for Operation 3.0.3. Pneumatic Controls Drifted Out of Calibr
page: https://kanterella.com/05000445/LER-2D1990-2D016-2C_-3Aon_900521-2Cengineering_Determined_That_Three_Atmospheric_Relief_Valves_Declared_Inoperable_Resulting_in_Entry_Into_Tech_Spec_Limiting_Condition_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000445/LER-1990-016, :on 900521,engineering Determined That Three Atmospheric Relief Valves Declared Inoperable Resulting in Entry Into Tech Spec Limiting Condition for Operation 3.0.3. Pneumatic Controls Drifted Out of Calibr

05000445/LER-1990-015, :on 900520,chemistry Sample Special Condition Surveillance Missed.Caused by Procedural Error.Procedures Revised to Provide Appropriate Cautions Re Required Sample
type: Subject
page: https://kanterella.com/05000445/LER-2D1990-2D015-2C_-3Aon_900520-2Cchemistry_Sample_Special_Condition_Surveillance_Missed.Caused_by_Procedural_Error.Procedures_Revised_to_Provide_Appropriate_Cautions_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000445/LER-1990-015, :on 900520,chemistry Sample Special Condition Surveillance Missed.Caused by Procedural Error.Procedures Revised to Provide Appropriate Cautions Re Required Sample

LER-1990-014, :on 900514,containment Penetration Improperly Isolated While Containment Isolation Valve Made Inoperable for Repairs.Caused by Inadequate Review of Work Order. Supervisor Counseled & Shift Order Issued
type: Subject
label: 05000445/LER-1990-014, :on 900514,containment Penetration Improperly Isolated While Containment Isolation Valve Made Inoperable for Repairs.Caused by Inadequate Review of Work Order. Supervisor Counseled & Shift Order Issued
page: https://kanterella.com/05000445/LER-2D1990-2D014-2C_-3Aon_900514-2Ccontainment_Penetration_Improperly_Isolated_While_Containment_Isolation_Valve_Made_Inoperable_for_Repairs.Caused_by_Inadequate_Review…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000445/LER-1990-014, :on 900514,containment Penetration Improperly Isolated While Containment Isolation Valve Made Inoperable for Repairs.Caused by Inadequate Review of Work Order. Supervisor Counseled & Shift Order Issued

LER-1990-005, :on 900510,steam Generator lo-lo Level Reactor Trip Occurred During Cold Shutdown.Caused by Inadequate Warning Sign Posting.Nonconformance Rept Written to Document Event & Recommend Evaluation
type: Subject
label: 05000266/LER-1990-005, :on 900510,steam Generator lo-lo Level Reactor Trip Occurred During Cold Shutdown.Caused by Inadequate Warning Sign Posting.Nonconformance Rept Written to Document Event & Recommend Evaluation
page: https://kanterella.com/05000266/LER-2D1990-2D005-2C_-3Aon_900510-2Csteam_Generator_lo-2Dlo_Level_Reactor_Trip_Occurred_During_Cold_Shutdown.Caused_by_Inadequate_Warning_Sign_Posting.Nonconformance_Rep…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000266/LER-1990-005, :on 900510,steam Generator lo-lo Level Reactor Trip Occurred During Cold Shutdown.Caused by Inadequate Warning Sign Posting.Nonconformance Rept Written to Document Event & Recommend Evaluation

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 306A
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-1990-010, :on 900428 & 29,2-h Surveillance Interval, Including 25- Extension Allowed by Tech Spec 4.0.2,exceeded. Caused by Personnel Error.Procedure Enhancements Initiated & Personnel Involved Counseled
type: Subject
label: 05000445/LER-1990-010, :on 900428 & 29,2-h Surveillance Interval, Including 25% Extension Allowed by Tech Spec 4.0.2,exceeded. Caused by Personnel Error.Procedure Enhancements Initiated & Personnel Involved Counseled
page: https://kanterella.com/05000445/LER-2D1990-2D010-2C_-3Aon_900428_-26_29-2C2-2Dh_Surveillance_Interval-2C_Including_25-_Extension_Allowed_by_Tech_Spec_4.0.2-2Cexceeded._Caused_by_Personnel_Error.Proced…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000445/LER-1990-010, :on 900428 & 29,2-h Surveillance Interval, Including 25% Extension Allowed by Tech Spec 4.0.2,exceeded. Caused by Personnel Error.Procedure Enhancements Initiated & Personnel Involved Counseled

05000482/LER-1990-004, :on 900405,Tech Spec Surveillance Requirement Not Satisfied Because of Personnel Error in Scheduling Surveillance Test.Procedure Adm 02-300 Revised
type: Subject
page: https://kanterella.com/05000482/LER-2D1990-2D004-2C_-3Aon_900405-2CTech_Spec_Surveillance_Requirement_Not_Satisfied_Because_of_Personnel_Error_in_Scheduling_Surveillance_Test.Procedure_Adm_02-2D300_Re…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000482/LER-1990-004, :on 900405,Tech Spec Surveillance Requirement Not Satisfied Because of Personnel Error in Scheduling Surveillance Test.Procedure Adm 02-300 Revised

LER-1990-010, :on 900418,oncoming Shift Supervisor Found That Containment Level C Temp Improperly Recorded.Caused by Data Being Recorded & Reviewed from Malfunctioning Indication.Individuals Counseled
type: Subject
label: 05000424/LER-1990-010, :on 900418,oncoming Shift Supervisor Found That Containment Level C Temp Improperly Recorded.Caused by Data Being Recorded & Reviewed from Malfunctioning Indication.Individuals Counseled
page: https://kanterella.com/05000424/LER-2D1990-2D010-2C_-3Aon_900418-2Concoming_Shift_Supervisor_Found_That_Containment_Level_C_Temp_Improperly_Recorded.Caused_by_Data_Being_Recorded_-26_Reviewed_from_Mal…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000424/LER-1990-010, :on 900418,oncoming Shift Supervisor Found That Containment Level C Temp Improperly Recorded.Caused by Data Being Recorded & Reviewed from Malfunctioning Indication.Individuals Counseled

MR-FC-83-046 Used Between Dec 1986 & 1992 Refueling Outage in Unacceptable Configuration
type: Subject
label: 05000285/LER-1993-005, :on 930422,determined That Incident Reportable in That SIRWT Recirculation Piping Associated w/MR-FC-83-046 Used Between Dec 1986 & 1992 Refueling Outage in Unacceptable Configuration
page: https://kanterella.com/05000285/LER-2D1993-2D005-2C_-3Aon_930422-2Cdetermined_That_Incident_Reportable_in_That_SIRWT_Recirculation_Piping_Associated_w/MR-2DFC-2D83-2D046_Used_Between_Dec_1986_-26_1992…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000285/LER-1993-005, :on 930422,determined That Incident Reportable in That SIRWT Recirculation Piping Associated w/MR-FC-83-046 Used Between Dec 1986 & 1992 Refueling Outage in Unacceptable Configuration

LER-1993-001, :on 930123,unit Automatically Tripped from Full Power Due to Turbine Trip Above P-9 Setpoint as Result of Depressurization of electro-hydraulic Control Supply Header. Failed Line & Differential Transformer Replaced
type: Subject
label: 05000499/LER-1993-001, :on 930123,unit Automatically Tripped from Full Power Due to Turbine Trip Above P-9 Setpoint as Result of Depressurization of electro-hydraulic Control Supply Header. Failed Line & Differential Transformer Replaced
page: https://kanterella.com/05000499/LER-2D1993-2D001-2C_-3Aon_930123-2Cunit_Automatically_Tripped_from_Full_Power_Due_to_Turbine_Trip_Above_P-2D9_Setpoint_as_Result_of_Depressurization_of_electro-2Dhydrau…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000499/LER-1993-001, :on 930123,unit Automatically Tripped from Full Power Due to Turbine Trip Above P-9 Setpoint as Result of Depressurization of electro-hydraulic Control Supply Header. Failed Line & Differential Transformer Replaced

LER-1993-004-01, :on 930225,scram Initiated by Taking Reactor Mode Switch Out of Run Mode When Water Level Observed to Be Below Normal.Caused by Slush Ice Present in Front of Bar Racks.Water Level Indicator Installed
type: Subject
label: 05000333/LER-1993-004-01, :on 930225,scram Initiated by Taking Reactor Mode Switch Out of Run Mode When Water Level Observed to Be Below Normal.Caused by Slush Ice Present in Front of Bar Racks.Water Level Indicator Installed
page: https://kanterella.com/05000333/LER-2D1993-2D004-2D01-2C_-3Aon_930225-2Cscram_Initiated_by_Taking_Reactor_Mode_Switch_Out_of_Run_Mode_When_Water_Level_Observed_to_Be_Below_Normal.Caused_by_Slush_Ice_P…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000333/LER-1993-004-01, :on 930225,scram Initiated by Taking Reactor Mode Switch Out of Run Mode When Water Level Observed to Be Below Normal.Caused by Slush Ice Present in Front of Bar Racks.Water Level Indicator Installed

Rebuilt
type: Subject
label: 05000333/LER-1993-006-01, :on 930225,fire Pump 76P-2 Declared Inoperable Due to Inadequate Pump Discharge Pressure.On 930226,fire Pump 76P-1 Declared Inoperable Due to Engine Overheating. Fire Pumps Will Be Replaced/Rebuilt
page: https://kanterella.com/05000333/LER-2D1993-2D006-2D01-2C_-3Aon_930225-2Cfire_Pump_76P-2D2_Declared_Inoperable_Due_to_Inadequate_Pump_Discharge_Pressure.On_930226-2Cfire_Pump_76P-2D1_Declared_Inoperabl…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000333/LER-1993-006-01, :on 930225,fire Pump 76P-2 Declared Inoperable Due to Inadequate Pump Discharge Pressure.On 930226,fire Pump 76P-1 Declared Inoperable Due to Engine Overheating. Fire Pumps Will Be Replaced/Rebuilt

LER-1993-005, :on 930219,emergency Bus de-energized Due to Emergency Bus Feeder Breakers Tripping Open.Caused by Failure of Two Degraded Voltage Auxiliary Relays.Procedures Revised to Preclude Emergency Trip
type: Subject
label: 05000338/LER-1993-005, :on 930219,emergency Bus de-energized Due to Emergency Bus Feeder Breakers Tripping Open.Caused by Failure of Two Degraded Voltage Auxiliary Relays.Procedures Revised to Preclude Emergency Trip
page: https://kanterella.com/05000338/LER-2D1993-2D005-2C_-3Aon_930219-2Cemergency_Bus_de-2Denergized_Due_to_Emergency_Bus_Feeder_Breakers_Tripping_Open.Caused_by_Failure_of_Two_Degraded_Voltage_Auxiliary_R…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000338/LER-1993-005, :on 930219,emergency Bus de-energized Due to Emergency Bus Feeder Breakers Tripping Open.Caused by Failure of Two Degraded Voltage Auxiliary Relays.Procedures Revised to Preclude Emergency Trip

LER-1993-002, :on 930124,spurious Signal from Pressurizer Pressure Channel 2 Resulted in Overtemp Nitrogen 16 Reactor Trip.Caused by Instrument Failure During Surveillance Testing.Failed Component Replaced
type: Subject
label: 05000445/LER-1993-002, :on 930124,spurious Signal from Pressurizer Pressure Channel 2 Resulted in Overtemp Nitrogen 16 Reactor Trip.Caused by Instrument Failure During Surveillance Testing.Failed Component Replaced
page: https://kanterella.com/05000445/LER-2D1993-2D002-2C_-3Aon_930124-2Cspurious_Signal_from_Pressurizer_Pressure_Channel_2_Resulted_in_Overtemp_Nitrogen_16_Reactor_Trip.Caused_by_Instrument_Failure_During…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000445/LER-1993-002, :on 930124,spurious Signal from Pressurizer Pressure Channel 2 Resulted in Overtemp Nitrogen 16 Reactor Trip.Caused by Instrument Failure During Surveillance Testing.Failed Component Replaced

relief Valve & Safety Valve Setpoint Variance Not within Tech Spec Limits.Cause Not Determined.Valves Inspected,Refurbished & Satisfactorily Retested at Wyle Labs Before Return to Site
type: Subject
label: 05000298/LER-1990-003, :on 900328,safety/relief Valve & Safety Valve Setpoint Variance Not within Tech Spec Limits.Cause Not Determined.Valves Inspected,Refurbished & Satisfactorily Retested at Wyle Labs Before Return to Site
page: https://kanterella.com/05000298/LER-2D1990-2D003-2C_-3Aon_900328-2Csafety/relief_Valve_-26_Safety_Valve_Setpoint_Variance_Not_within_Tech_Spec_Limits.Cause_Not_Determined.Valves_Inspected-2CRefurbishe…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000298/LER-1990-003, :on 900328,safety/relief Valve & Safety Valve Setpoint Variance Not within Tech Spec Limits.Cause Not Determined.Valves Inspected,Refurbished & Satisfactorily Retested at Wyle Labs Before Return to Site

LER-1994-007-01, :on 940412,CRAC & Ebfs Were Inoperable Due to Previous Charcoal Testing Performed to Industry Std Different than Ts.Corrective Actions:Ts Changed to Reflect Newest Charcoal Testing Procedure
type: Subject
label: 05000336/LER-1994-007-01, :on 940412,CRAC & Ebfs Were Inoperable Due to Previous Charcoal Testing Performed to Industry Std Different than Ts.Corrective Actions:Ts Changed to Reflect Newest Charcoal Testing Procedure
page: https://kanterella.com/05000336/LER-2D1994-2D007-2D01-2C_-3Aon_940412-2CCRAC_-26_Ebfs_Were_Inoperable_Due_to_Previous_Charcoal_Testing_Performed_to_Industry_Std_Different_than_Ts.Corrective_Actions-3A…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1994-007-01, :on 940412,CRAC & Ebfs Were Inoperable Due to Previous Charcoal Testing Performed to Industry Std Different than Ts.Corrective Actions:Ts Changed to Reflect Newest Charcoal Testing Procedure

LER-1990-003, :on 900228,52 Valves Identified Not Included in Tech Spec Required Monthly Containment Integrity Verification Surveillance Program.Caused by Personnel Error & Inadequate Procedure.Procedure Revised
type: Subject
label: 05000338/LER-1990-003, :on 900228,52 Valves Identified Not Included in Tech Spec Required Monthly Containment Integrity Verification Surveillance Program.Caused by Personnel Error & Inadequate Procedure.Procedure Revised
page: https://kanterella.com/05000338/LER-2D1990-2D003-2C_-3Aon_900228-2C52_Valves_Identified_Not_Included_in_Tech_Spec_Required_Monthly_Containment_Integrity_Verification_Surveillance_Program.Caused_by_Per…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000338/LER-1990-003, :on 900228,52 Valves Identified Not Included in Tech Spec Required Monthly Containment Integrity Verification Surveillance Program.Caused by Personnel Error & Inadequate Procedure.Procedure Revised

LER-1989-029, :on 890914,locked High Radiation Area Door Found to Have Been Unsecured Contrary to Tech Spec 6.13.2. Caused by Failure to Adhere to Approved Procedures. Training on Access Requirements Initiated
type: Subject
label: 05000293/LER-1989-029, :on 890914,locked High Radiation Area Door Found to Have Been Unsecured Contrary to Tech Spec 6.13.2. Caused by Failure to Adhere to Approved Procedures. Training on Access Requirements Initiated
page: https://kanterella.com/05000293/LER-2D1989-2D029-2C_-3Aon_890914-2Clocked_High_Radiation_Area_Door_Found_to_Have_Been_Unsecured_Contrary_to_Tech_Spec_6.13.2._Caused_by_Failure_to_Adhere_to_Approved_Pr…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1989-029, :on 890914,locked High Radiation Area Door Found to Have Been Unsecured Contrary to Tech Spec 6.13.2. Caused by Failure to Adhere to Approved Procedures. Training on Access Requirements Initiated

05000483/LER-2018-001, Violation of Technical Specification 3.6.3 Containment Isolation Manual Found in Open Position
type: Subject
page: https://kanterella.com/05000483/LER-2D2018-2D001-2C_Violation_of_Technical_Specification_3.6.3_Containment_Isolation_Manual_Found_in_Open_Position
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000483/LER-2018-001, Violation of Technical Specification 3.6.3 Containment Isolation Manual Found in Open Position

LER-1998-017, :on 980602,control Room Ventilation Sys Was Declared Inoperable.Caused by Original Design Deficiency. Mod Designed,Tested & Implemented Prior to Startup from RF06 to Correct Design Deficiency
type: Subject
label: 05000410/LER-1998-017, :on 980602,control Room Ventilation Sys Was Declared Inoperable.Caused by Original Design Deficiency. Mod Designed,Tested & Implemented Prior to Startup from RF06 to Correct Design Deficiency
page: https://kanterella.com/05000410/LER-2D1998-2D017-2C_-3Aon_980602-2Ccontrol_Room_Ventilation_Sys_Was_Declared_Inoperable.Caused_by_Original_Design_Deficiency._Mod_Designed-2CTested_-26_Implemented_Prio…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000410/LER-1998-017, :on 980602,control Room Ventilation Sys Was Declared Inoperable.Caused by Original Design Deficiency. Mod Designed,Tested & Implemented Prior to Startup from RF06 to Correct Design Deficiency

LER-1997-020, :on 970814,inadequate Fire Protection Provided for safety-related EDG Fuel Oil Transfer Pump Cables Resulted in Operation Outside Design Basis.Caused by Engineering Oversight.Established Fire Watches
type: Subject
label: 05000400/LER-1997-020, :on 970814,inadequate Fire Protection Provided for safety-related EDG Fuel Oil Transfer Pump Cables Resulted in Operation Outside Design Basis.Caused by Engineering Oversight.Established Fire Watches
page: https://kanterella.com/05000400/LER-2D1997-2D020-2C_-3Aon_970814-2Cinadequate_Fire_Protection_Provided_for_safety-2Drelated_EDG_Fuel_Oil_Transfer_Pump_Cables_Resulted_in_Operation_Outside_Design_Basis…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000400/LER-1997-020, :on 970814,inadequate Fire Protection Provided for safety-related EDG Fuel Oil Transfer Pump Cables Resulted in Operation Outside Design Basis.Caused by Engineering Oversight.Established Fire Watches

LER-1997-001-01, :on 970131,automatic Reactor Tripped Resulting from SG low-low Level.Caused by Inadvertent Closure of Mfiv (1FW-159) & Faulty Hydraulic Relays.Shuttle Valves Replaced, SG Level Discrepancy Investigated
type: Subject
label: 05000400/LER-1997-001-01, :on 970131,automatic Reactor Tripped Resulting from SG low-low Level.Caused by Inadvertent Closure of Mfiv (1FW-159) & Faulty Hydraulic Relays.Shuttle Valves Replaced, SG Level Discrepancy Investigated
page: https://kanterella.com/05000400/LER-2D1997-2D001-2D01-2C_-3Aon_970131-2Cautomatic_Reactor_Tripped_Resulting_from_SG_low-2Dlow_Level.Caused_by_Inadvertent_Closure_of_Mfiv_-281FW-2D159-29_-26_Faulty_Hyd…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000400/LER-1997-001-01, :on 970131,automatic Reactor Tripped Resulting from SG low-low Level.Caused by Inadvertent Closure of Mfiv (1FW-159) & Faulty Hydraulic Relays.Shuttle Valves Replaced, SG Level Discrepancy Investigated

05000400/LER-1996-021, :on 961107,inadequate post-maint Testing Following Repairs on Containment Isolation Valve 1SP-208 Identified.Caused by Misinterpretation of ASME Code. Procedures Revised
type: Subject
page: https://kanterella.com/05000400/LER-2D1996-2D021-2C_-3Aon_961107-2Cinadequate_post-2Dmaint_Testing_Following_Repairs_on_Containment_Isolation_Valve_1SP-2D208_Identified.Caused_by_Misinterpretation_of_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000400/LER-1996-021, :on 961107,inadequate post-maint Testing Following Repairs on Containment Isolation Valve 1SP-208 Identified.Caused by Misinterpretation of ASME Code. Procedures Revised

LER-1987-040, :on 870630,discovered That Surveillance Interval for Calorimetric Exceeded.Caused by Personnel Error.Night Order Issued Instructing Personnel on Importance of Performing Surveillances
type: Subject
label: 05000400/LER-1987-040, :on 870630,discovered That Surveillance Interval for Calorimetric Exceeded.Caused by Personnel Error.Night Order Issued Instructing Personnel on Importance of Performing Surveillances
page: https://kanterella.com/05000400/LER-2D1987-2D040-2C_-3Aon_870630-2Cdiscovered_That_Surveillance_Interval_for_Calorimetric_Exceeded.Caused_by_Personnel_Error.Night_Order_Issued_Instructing_Personnel_on…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000400/LER-1987-040, :on 870630,discovered That Surveillance Interval for Calorimetric Exceeded.Caused by Personnel Error.Night Order Issued Instructing Personnel on Importance of Performing Surveillances

05000458/LER-2015-003, Regarding Operations Prohibited by Technical Specifications and Loss of Safety Function Due to Inoperability of Division 2 Containment Penetration Leakage Control System
type: Subject
page: https://kanterella.com/05000458/LER-2D2015-2D003-2C_Regarding_Operations_Prohibited_by_Technical_Specifications_and_Loss_of_Safety_Function_Due_to_Inoperability_of_Division_2_Containment_Penetration_L…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000458/LER-2015-003, Regarding Operations Prohibited by Technical Specifications and Loss of Safety Function Due to Inoperability of Division 2 Containment Penetration Leakage Control System

05000269/LER-2014-001, Regarding Unanalyzed Condition Associated with the 13.8kV Emergency Power Cables Located in the Underground Trench
type: Subject
page: https://kanterella.com/05000269/LER-2D2014-2D001-2C_Regarding_Unanalyzed_Condition_Associated_with_the_13.8kV_Emergency_Power_Cables_Located_in_the_Underground_Trench
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000269/LER-2014-001, Regarding Unanalyzed Condition Associated with the 13.8kV Emergency Power Cables Located in the Underground Trench

05000397/LER-2014-003, Regarding Degraded Tornado Missile Barrier
type: Subject
page: https://kanterella.com/05000397/LER-2D2014-2D003-2C_Regarding_Degraded_Tornado_Missile_Barrier
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000397/LER-2014-003, Regarding Degraded Tornado Missile Barrier

05000237/LER-2013-001, Secondary Containment Inoperable Due to Two Interlock Doors Being Open Simultaneously
type: Subject
page: https://kanterella.com/05000237/LER-2D2013-2D001-2C_Secondary_Containment_Inoperable_Due_to_Two_Interlock_Doors_Being_Open_Simultaneously
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000237/LER-2013-001, Secondary Containment Inoperable Due to Two Interlock Doors Being Open Simultaneously

05000237/LER-2009-004, Shutdown Cooling System Isolation During Cooldown Due to Temperature Instrumentation Failure
type: Subject
page: https://kanterella.com/05000237/LER-2D2009-2D004-2C_Shutdown_Cooling_System_Isolation_During_Cooldown_Due_to_Temperature_Instrumentation_Failure
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000237/LER-2009-004, Shutdown Cooling System Isolation During Cooldown Due to Temperature Instrumentation Failure

05000219/LER-2008-001, Automatic Reactor Shutdown Caused by Main Transformer Failure
type: Subject
page: https://kanterella.com/05000219/LER-2D2008-2D001-2C_Automatic_Reactor_Shutdown_Caused_by_Main_Transformer_Failure
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000219/LER-2008-001, Automatic Reactor Shutdown Caused by Main Transformer Failure

05000390/LER-2001-004, Turbine/Reactor Initiated by an Invalid AMSAC Signal
type: Subject
page: https://kanterella.com/05000390/LER-2D2001-2D004-2C_Turbine/Reactor_Initiated_by_an_Invalid_AMSAC_Signal
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000390/LER-2001-004, Turbine/Reactor Initiated by an Invalid AMSAC Signal

LER-1998-004-02, :on 980419,defeat of Turbine Trip Function Led to Improper Mode Entry.Caused by Inadequate Administrative Controls of Work Process.Controls to Prevent Recurrence Are Being Instituted
type: Subject
label: 05000425/LER-1998-004-02, :on 980419,defeat of Turbine Trip Function Led to Improper Mode Entry.Caused by Inadequate Administrative Controls of Work Process.Controls to Prevent Recurrence Are Being Instituted
page: https://kanterella.com/05000425/LER-2D1998-2D004-2D02-2C_-3Aon_980419-2Cdefeat_of_Turbine_Trip_Function_Led_to_Improper_Mode_Entry.Caused_by_Inadequate_Administrative_Controls_of_Work_Process.Controls…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000425/LER-1998-004-02, :on 980419,defeat of Turbine Trip Function Led to Improper Mode Entry.Caused by Inadequate Administrative Controls of Work Process.Controls to Prevent Recurrence Are Being Instituted

LER-1998-015, :on 980420,containments Fan Cooler Test Results Were Outside Acceptance Criteria.Cause Is Still Being Evaluated.Pressure Washing of Air Side of Cooling Coils for All Four Unit 1 CFCs Has Been Completed
type: Subject
label: 05000266/LER-1998-015, :on 980420,containments Fan Cooler Test Results Were Outside Acceptance Criteria.Cause Is Still Being Evaluated.Pressure Washing of Air Side of Cooling Coils for All Four Unit 1 CFCs Has Been Completed
page: https://kanterella.com/05000266/LER-2D1998-2D015-2C_-3Aon_980420-2Ccontainments_Fan_Cooler_Test_Results_Were_Outside_Acceptance_Criteria.Cause_Is_Still_Being_Evaluated.Pressure_Washing_of_Air_Side_of_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000266/LER-1998-015, :on 980420,containments Fan Cooler Test Results Were Outside Acceptance Criteria.Cause Is Still Being Evaluated.Pressure Washing of Air Side of Cooling Coils for All Four Unit 1 CFCs Has Been Completed

LER-1998-003-01, :on 980513,failure to Meet TS for Main Control Room Emergency Ventilation,Was Identified.Caused by Failure to Follow GP-25 Procedure Guidance.Main Control Room Emergency Ventilation Relays Inspected for Loose Screws
type: Subject
label: 05000277/LER-1998-003-01, :on 980513,failure to Meet TS for Main Control Room Emergency Ventilation,Was Identified.Caused by Failure to Follow GP-25 Procedure Guidance.Main Control Room Emergency Ventilation Relays Inspected for Loose Screws
page: https://kanterella.com/05000277/LER-2D1998-2D003-2D01-2C_-3Aon_980513-2Cfailure_to_Meet_TS_for_Main_Control_Room_Emergency_Ventilation-2CWas_Identified.Caused_by_Failure_to_Follow_GP-2D25_Procedure_Gu…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000277/LER-1998-003-01, :on 980513,failure to Meet TS for Main Control Room Emergency Ventilation,Was Identified.Caused by Failure to Follow GP-25 Procedure Guidance.Main Control Room Emergency Ventilation Relays Inspected for Loose Screws

05000302/LER-1998-006, :on 980514,low Rc Pressure Bistable Contacts Were Not Uniquely Tested.Caused by Personnel Error.Revised Sps SP-110 A,B,C & D
type: Subject
page: https://kanterella.com/05000302/LER-2D1998-2D006-2C_-3Aon_980514-2Clow_Rc_Pressure_Bistable_Contacts_Were_Not_Uniquely_Tested.Caused_by_Personnel_Error.Revised_Sps_SP-2D110_A-2CB-2CC_-26_D
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000302/LER-1998-006, :on 980514,low Rc Pressure Bistable Contacts Were Not Uniquely Tested.Caused by Personnel Error.Revised Sps SP-110 A,B,C & D

05000348/LER-1998-003, :on 970315,failure to Comply W/Ts 4.5.3.2 & 3.5.2,was Determined.Caused by Personnel Error.Personnel Involved Have Been Coached Re Procedure Adherence
type: Subject
page: https://kanterella.com/05000348/LER-2D1998-2D003-2C_-3Aon_970315-2Cfailure_to_Comply_W/Ts_4.5.3.2_-26_3.5.2-2Cwas_Determined.Caused_by_Personnel_Error.Personnel_Involved_Have_Been_Coached_Re_Procedure…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000348/LER-1998-003, :on 970315,failure to Comply W/Ts 4.5.3.2 & 3.5.2,was Determined.Caused by Personnel Error.Personnel Involved Have Been Coached Re Procedure Adherence

Or Insp of Portions Planned
type: Subject
label: 05000341/LER-1989-007, :on 890307,increasing Trend Observed in Vibration of Number 8 Bearing on Main Turbine Generator. Cause Undetermined.Turbine Balanced in Subsequent Outage. Disassembly &/Or Insp of Portions Planned
page: https://kanterella.com/05000341/LER-2D1989-2D007-2C_-3Aon_890307-2Cincreasing_Trend_Observed_in_Vibration_of_Number_8_Bearing_on_Main_Turbine_Generator._Cause_Undetermined.Turbine_Balanced_in_Subseque…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000341/LER-1989-007, :on 890307,increasing Trend Observed in Vibration of Number 8 Bearing on Main Turbine Generator. Cause Undetermined.Turbine Balanced in Subsequent Outage. Disassembly &/Or Insp of Portions Planned

LER-1987-021, :on 870607,RCS Leakage Limit Surveillance Interval,Including 25- Max Allowable Extension,Exceeded by 1 H.Caused by Personnel Error.Instructions Given to Personnel Re Completing Surveillance on Time
type: Subject
label: 05000341/LER-1987-021, :on 870607,RCS Leakage Limit Surveillance Interval,Including 25% Max Allowable Extension,Exceeded by 1 H.Caused by Personnel Error.Instructions Given to Personnel Re Completing Surveillance on Time
page: https://kanterella.com/05000341/LER-2D1987-2D021-2C_-3Aon_870607-2CRCS_Leakage_Limit_Surveillance_Interval-2CIncluding_25-_Max_Allowable_Extension-2CExceeded_by_1_H.Caused_by_Personnel_Error.Instructi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000341/LER-1987-021, :on 870607,RCS Leakage Limit Surveillance Interval,Including 25% Max Allowable Extension,Exceeded by 1 H.Caused by Personnel Error.Instructions Given to Personnel Re Completing Surveillance on Time

LER-1987-034, :on 870730,reactor Scram Occurred Due to Inadvertent Deenergizing of 120 Volt Ac Uninterruptible Power Supply Inverter.Caused by Inadequate Equipment Operator Training Program.Training Upgraded
type: Subject
label: 05000354/LER-1987-034, :on 870730,reactor Scram Occurred Due to Inadvertent Deenergizing of 120 Volt Ac Uninterruptible Power Supply Inverter.Caused by Inadequate Equipment Operator Training Program.Training Upgraded
page: https://kanterella.com/05000354/LER-2D1987-2D034-2C_-3Aon_870730-2Creactor_Scram_Occurred_Due_to_Inadvertent_Deenergizing_of_120_Volt_Ac_Uninterruptible_Power_Supply_Inverter.Caused_by_Inadequate_Equi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000354/LER-1987-034, :on 870730,reactor Scram Occurred Due to Inadvertent Deenergizing of 120 Volt Ac Uninterruptible Power Supply Inverter.Caused by Inadequate Equipment Operator Training Program.Training Upgraded

LER-1998-006, :on 980707,RCS Pressurizer Safety Relief Valves Failed Low on as Found Set Pressure Test.Caused by Set Pressure Drift.Pressurizer SRVs Were Refurbished Following Set Pressure Testing
type: Subject
label: 05000483/LER-1998-006, :on 980707,RCS Pressurizer Safety Relief Valves Failed Low on as Found Set Pressure Test.Caused by Set Pressure Drift.Pressurizer SRVs Were Refurbished Following Set Pressure Testing
page: https://kanterella.com/05000483/LER-2D1998-2D006-2C_-3Aon_980707-2CRCS_Pressurizer_Safety_Relief_Valves_Failed_Low_on_as_Found_Set_Pressure_Test.Caused_by_Set_Pressure_Drift.Pressurizer_SRVs_Were_Refu…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000483/LER-1998-006, :on 980707,RCS Pressurizer Safety Relief Valves Failed Low on as Found Set Pressure Test.Caused by Set Pressure Drift.Pressurizer SRVs Were Refurbished Following Set Pressure Testing

Level Controller Response in All Situations. Controller Windup Will Be Demonstrated
type: Subject
label: 05000334/LER-1997-022, :on 970730,ESFA of P-12 Interlock Occurred Due to Decreased Reactor Water Temp.Caused by Operator Unfamiliarity W/Level Controller Response in All Situations. Controller Windup Will Be Demonstrated
page: https://kanterella.com/05000334/LER-2D1997-2D022-2C_-3Aon_970730-2CESFA_of_P-2D12_Interlock_Occurred_Due_to_Decreased_Reactor_Water_Temp.Caused_by_Operator_Unfamiliarity_W/Level_Controller_Response_in…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000334/LER-1997-022, :on 970730,ESFA of P-12 Interlock Occurred Due to Decreased Reactor Water Temp.Caused by Operator Unfamiliarity W/Level Controller Response in All Situations. Controller Windup Will Be Demonstrated

LER-1997-024, :on 970731,feedwater Valves Did Not Meet Requirements for Main Steam Line or Feedwater Line Break Event Mitigation.Caused by Inadequate Design & Calculation Errors.Fsar Will Be Updated by 971130
type: Subject
label: 05000302/LER-1997-024, :on 970731,feedwater Valves Did Not Meet Requirements for Main Steam Line or Feedwater Line Break Event Mitigation.Caused by Inadequate Design & Calculation Errors.Fsar Will Be Updated by 971130
page: https://kanterella.com/05000302/LER-2D1997-2D024-2C_-3Aon_970731-2Cfeedwater_Valves_Did_Not_Meet_Requirements_for_Main_Steam_Line_or_Feedwater_Line_Break_Event_Mitigation.Caused_by_Inadequate_Design_-…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000302/LER-1997-024, :on 970731,feedwater Valves Did Not Meet Requirements for Main Steam Line or Feedwater Line Break Event Mitigation.Caused by Inadequate Design & Calculation Errors.Fsar Will Be Updated by 971130

LER-1998-001-04, :on 980308,personnel Noticed Discrepancies Between Demand Position Step Counters & Digital Rod Position Indicators.Caused by Rod Control Firing Card Operating Abnormally.Firing Card Replaced
type: Subject
label: 05000425/LER-1998-001-04, :on 980308,personnel Noticed Discrepancies Between Demand Position Step Counters & Digital Rod Position Indicators.Caused by Rod Control Firing Card Operating Abnormally.Firing Card Replaced
page: https://kanterella.com/05000425/LER-2D1998-2D001-2D04-2C_-3Aon_980308-2Cpersonnel_Noticed_Discrepancies_Between_Demand_Position_Step_Counters_-26_Digital_Rod_Position_Indicators.Caused_by_Rod_Control_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000425/LER-1998-001-04, :on 980308,personnel Noticed Discrepancies Between Demand Position Step Counters & Digital Rod Position Indicators.Caused by Rod Control Firing Card Operating Abnormally.Firing Card Replaced

LER-1998-002-01, :on 980311,evaluation Determined That as-found lug-to-post Connection Represented Condition Outside of Design Basis,Per 10CFR50.72(b)(1)(ii)(B).Caused by Cognitive Personnel Error.Nut Placed on Terminal Post
type: Subject
label: 05000425/LER-1998-002-01, :on 980311,evaluation Determined That as-found lug-to-post Connection Represented Condition Outside of Design Basis,Per 10CFR50.72(b)(1)(ii)(B).Caused by Cognitive Personnel Error.Nut Placed on Terminal Post
page: https://kanterella.com/05000425/LER-2D1998-2D002-2D01-2C_-3Aon_980311-2Cevaluation_Determined_That_as-2Dfound_lug-2Dto-2Dpost_Connection_Represented_Condition_Outside_of_Design_Basis-2CPer_10CFR50.72-…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000425/LER-1998-002-01, :on 980311,evaluation Determined That as-found lug-to-post Connection Represented Condition Outside of Design Basis,Per 10CFR50.72(b)(1)(ii)(B).Caused by Cognitive Personnel Error.Nut Placed on Terminal Post

LER-1999-006-02, :on 990705,both EDGs Were Inoperable.Caused by Ambient Air Temp Exceeding 88 Degrees Fahrenheit.Temporary Mods Tm 99-41 & Tm 99-42,implemented for EDG a Were Completed on 990706.With
type: Subject
label: 05000293/LER-1999-006-02, :on 990705,both EDGs Were Inoperable.Caused by Ambient Air Temp Exceeding 88 Degrees Fahrenheit.Temporary Mods Tm 99-41 & Tm 99-42,implemented for EDG a Were Completed on 990706.With
page: https://kanterella.com/05000293/LER-2D1999-2D006-2D02-2C_-3Aon_990705-2Cboth_EDGs_Were_Inoperable.Caused_by_Ambient_Air_Temp_Exceeding_88_Degrees_Fahrenheit.Temporary_Mods_Tm_99-2D41_-26_Tm_99-2D42-2C…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1999-006-02, :on 990705,both EDGs Were Inoperable.Caused by Ambient Air Temp Exceeding 88 Degrees Fahrenheit.Temporary Mods Tm 99-41 & Tm 99-42,implemented for EDG a Were Completed on 990706.With

LER-1997-020, :on 970718,identified Failure of CREVS in-place Testing of HEPA Filters to Meet Improved TS Surveillance Requirement.Caused by Cognitive Personnel Error.Will Revise Ventilation Filter Test Program
type: Subject
label: 05000302/LER-1997-020, :on 970718,identified Failure of CREVS in-place Testing of HEPA Filters to Meet Improved TS Surveillance Requirement.Caused by Cognitive Personnel Error.Will Revise Ventilation Filter Test Program
page: https://kanterella.com/05000302/LER-2D1997-2D020-2C_-3Aon_970718-2Cidentified_Failure_of_CREVS_in-2Dplace_Testing_of_HEPA_Filters_to_Meet_Improved_TS_Surveillance_Requirement.Caused_by_Cognitive_Perso…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000302/LER-1997-020, :on 970718,identified Failure of CREVS in-place Testing of HEPA Filters to Meet Improved TS Surveillance Requirement.Caused by Cognitive Personnel Error.Will Revise Ventilation Filter Test Program

LER-1987-001, :on 870107,reactor Scrammed When Turbine Stop Valve Partially Closed.Possibly Caused When Turbine Reset During Simulated Overspeed Test or Oil Pressure at Stop Valve Temporarily Decreasing.Valve Closed
type: Subject
label: 05000409/LER-1987-001, :on 870107,reactor Scrammed When Turbine Stop Valve Partially Closed.Possibly Caused When Turbine Reset During Simulated Overspeed Test or Oil Pressure at Stop Valve Temporarily Decreasing.Valve Closed
page: https://kanterella.com/05000409/LER-2D1987-2D001-2C_-3Aon_870107-2Creactor_Scrammed_When_Turbine_Stop_Valve_Partially_Closed.Possibly_Caused_When_Turbine_Reset_During_Simulated_Overspeed_Test_or_Oil_P…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000409/LER-1987-001, :on 870107,reactor Scrammed When Turbine Stop Valve Partially Closed.Possibly Caused When Turbine Reset During Simulated Overspeed Test or Oil Pressure at Stop Valve Temporarily Decreasing.Valve Closed

LER-1987-004, :on 870218,dry Chemical Fire Suppression Sys of Piping Trench Below Emergency Diesel Generator Discovered Inoperable.Caused by Personnel Error.Work Prioritization Identification Requirements Reviewed
type: Subject
label: 05000293/LER-1987-004, :on 870218,dry Chemical Fire Suppression Sys of Piping Trench Below Emergency Diesel Generator Discovered Inoperable.Caused by Personnel Error.Work Prioritization Identification Requirements Reviewed
page: https://kanterella.com/05000293/LER-2D1987-2D004-2C_-3Aon_870218-2Cdry_Chemical_Fire_Suppression_Sys_of_Piping_Trench_Below_Emergency_Diesel_Generator_Discovered_Inoperable.Caused_by_Personnel_Error.W…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1987-004, :on 870218,dry Chemical Fire Suppression Sys of Piping Trench Below Emergency Diesel Generator Discovered Inoperable.Caused by Personnel Error.Work Prioritization Identification Requirements Reviewed

05000334/LER-1998-029, :on 981218,inadequate Meterological Instrumentation Calibr Led to Failure to Comply with Tss.Caused by Human Error.Current Wind Direction Sensor Was Replaced.With
type: Subject
page: https://kanterella.com/05000334/LER-2D1998-2D029-2C_-3Aon_981218-2Cinadequate_Meterological_Instrumentation_Calibr_Led_to_Failure_to_Comply_with_Tss.Caused_by_Human_Error.Current_Wind_Direction_Sensor…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000334/LER-1998-029, :on 981218,inadequate Meterological Instrumentation Calibr Led to Failure to Comply with Tss.Caused by Human Error.Current Wind Direction Sensor Was Replaced.With

LER-1998-002-01, :on 980708,excessive FW Temp Reduction Was Noted as Result of Loss of Stator CW with Main Turbine. Caused by Failure to Analyze Worst Case Lfwh Transient. Process Computer Databank Was Updated.With
type: Subject
label: 05000324/LER-1998-002-01, :on 980708,excessive FW Temp Reduction Was Noted as Result of Loss of Stator CW with Main Turbine. Caused by Failure to Analyze Worst Case Lfwh Transient. Process Computer Databank Was Updated.With
page: https://kanterella.com/05000324/LER-2D1998-2D002-2D01-2C_-3Aon_980708-2Cexcessive_FW_Temp_Reduction_Was_Noted_as_Result_of_Loss_of_Stator_CW_with_Main_Turbine._Caused_by_Failure_to_Analyze_Worst_Case_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000324/LER-1998-002-01, :on 980708,excessive FW Temp Reduction Was Noted as Result of Loss of Stator CW with Main Turbine. Caused by Failure to Analyze Worst Case Lfwh Transient. Process Computer Databank Was Updated.With

05000327/LER-1992-022, :on 921122,CREVS Declared Inoperable Because of Closure of Tornado Dampers.Caused by Tornado Warning & Sighting of Tornado Moving Toward Snp.Corrective Actions Not Applicable
type: Subject
page: https://kanterella.com/05000327/LER-2D1992-2D022-2C_-3Aon_921122-2CCREVS_Declared_Inoperable_Because_of_Closure_of_Tornado_Dampers.Caused_by_Tornado_Warning_-26_Sighting_of_Tornado_Moving_Toward_Snp.C…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000327/LER-1992-022, :on 921122,CREVS Declared Inoperable Because of Closure of Tornado Dampers.Caused by Tornado Warning & Sighting of Tornado Moving Toward Snp.Corrective Actions Not Applicable

05000416/LER-1984-052, :on 841124,scram Occurred on Low Reactor Water Level.Caused by Opening of Feedwater Isolation Valve Per Cleanup Procedure.Level Restored by Resetting Reactor Feed Pump Turbine a
type: Subject
page: https://kanterella.com/05000416/LER-2D1984-2D052-2C_-3Aon_841124-2Cscram_Occurred_on_Low_Reactor_Water_Level.Caused_by_Opening_of_Feedwater_Isolation_Valve_Per_Cleanup_Procedure.Level_Restored_by_Rese…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000416/LER-1984-052, :on 841124,scram Occurred on Low Reactor Water Level.Caused by Opening of Feedwater Isolation Valve Per Cleanup Procedure.Level Restored by Resetting Reactor Feed Pump Turbine a

Action Taken
type: Subject
label: 05000293/LER-1995-009, :on 950821,discovered Surveillance Procedure 8.5.1.3, Core Spray Motor Operated Valve Quarterly Operability Test Not Performed.Caused by Personnel Error. Appropriate Mgt Attention/Action Taken
page: https://kanterella.com/05000293/LER-2D1995-2D009-2C_-3Aon_950821-2Cdiscovered_Surveillance_Procedure_8.5.1.3-2C_Core_Spray_Motor_Operated_Valve_Quarterly_Operability_Test_Not_Performed.Caused_by_Perso…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000293/LER-1995-009, :on 950821,discovered Surveillance Procedure 8.5.1.3, Core Spray Motor Operated Valve Quarterly Operability Test Not Performed.Caused by Personnel Error. Appropriate Mgt Attention/Action Taken

LER-1995-011, :on 951218,missed Source Range Surveillance Occurred.Caused by Lack of Attention to Detail by Operations Supervisors Controlling Plant Shutdown Procedure.Operations Supervisors Involved Counseled
type: Subject
label: 05000334/LER-1995-011, :on 951218,missed Source Range Surveillance Occurred.Caused by Lack of Attention to Detail by Operations Supervisors Controlling Plant Shutdown Procedure.Operations Supervisors Involved Counseled
page: https://kanterella.com/05000334/LER-2D1995-2D011-2C_-3Aon_951218-2Cmissed_Source_Range_Surveillance_Occurred.Caused_by_Lack_of_Attention_to_Detail_by_Operations_Supervisors_Controlling_Plant_Shutdown_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000334/LER-1995-011, :on 951218,missed Source Range Surveillance Occurred.Caused by Lack of Attention to Detail by Operations Supervisors Controlling Plant Shutdown Procedure.Operations Supervisors Involved Counseled

05000336/LER-1995-043, :on 951115,reactor Core Power Exceeded Rated Thermal Power of 2,700 Mw for Period of 11 H.Caused by Personnel Error.Changed Procedure OP 2316A
type: Subject
page: https://kanterella.com/05000336/LER-2D1995-2D043-2C_-3Aon_951115-2Creactor_Core_Power_Exceeded_Rated_Thermal_Power_of_2-2C700_Mw_for_Period_of_11_H.Caused_by_Personnel_Error.Changed_Procedure_OP_2316A
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000336/LER-1995-043, :on 951115,reactor Core Power Exceeded Rated Thermal Power of 2,700 Mw for Period of 11 H.Caused by Personnel Error.Changed Procedure OP 2316A

LER-1991-017-02, :on 911017,Wyle Labs Notified Util That safety- Relief Valves Exceeded Tech Spec Setpoint Drift.Caused by pilot-disc-to-seat Bonding Preventing Valves from Actuating.Ts Change Will Be Requested
type: Subject
label: 05000324/LER-1991-017-02, :on 911017,Wyle Labs Notified Util That safety- Relief Valves Exceeded Tech Spec Setpoint Drift.Caused by pilot-disc-to-seat Bonding Preventing Valves from Actuating.Ts Change Will Be Requested
page: https://kanterella.com/05000324/LER-2D1991-2D017-2D02-2C_-3Aon_911017-2CWyle_Labs_Notified_Util_That_safety-2D_Relief_Valves_Exceeded_Tech_Spec_Setpoint_Drift.Caused_by_pilot-2Ddisc-2Dto-2Dseat_Bondin…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000324/LER-1991-017-02, :on 911017,Wyle Labs Notified Util That safety- Relief Valves Exceeded Tech Spec Setpoint Drift.Caused by pilot-disc-to-seat Bonding Preventing Valves from Actuating.Ts Change Will Be Requested

05000277/LER-1994-005-02, :on 940722,actual Torus Water Level Less than That Indicated on Narrow Range Instrumentation.Initial Ref Marking Used to Support Calibr Activities Not Correct
type: Subject
page: https://kanterella.com/05000277/LER-2D1994-2D005-2D02-2C_-3Aon_940722-2Cactual_Torus_Water_Level_Less_than_That_Indicated_on_Narrow_Range_Instrumentation.Initial_Ref_Marking_Used_to_Support_Calibr_Act…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 306A
wiki page sort key: 05000277/LER-1994-005-02, :on 940722,actual Torus Water Level Less than That Indicated on Narrow Range Instrumentation.Initial Ref Marking Used to Support Calibr Activities Not Correct

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