NRC Form 355
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creation date: 2025-12-17T16:49:10-05:00
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NRC Form 355
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page: https://kanterella.com/NRC_Form_355
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wiki page sort key: NRC Form 355

ML20140E939
type: Subject
page: https://kanterella.com/ML20140E939
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wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: ML20140E939

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 355
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

ML20236S564
type: Subject
page: https://kanterella.com/ML20236S564
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: ML20236S564

ML20126C787
type: Subject
page: https://kanterella.com/ML20126C787
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NRC form: NRC Form 355
wiki page sort key: ML20126C787

ML061710020
type: Subject
page: https://kanterella.com/ML061710020
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: ML061710020

ML19341D752
type: Subject
page: https://kanterella.com/ML19341D752
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: ML19341D752

LER-1993-010, :on 931108,HPCS Was Inoperable Due to Equipment Deficiency,Inadequate Managerial Methods & Poor Work Practices.Replaced Deficient Contactors & Restored Tap Setting.Also Reportable Per Part 21
type: Subject
label: 05000410/LER-1993-010, :on 931108,HPCS Was Inoperable Due to Equipment Deficiency,Inadequate Managerial Methods & Poor Work Practices.Replaced Deficient Contactors & Restored Tap Setting.Also Reportable Per Part 21
page: https://kanterella.com/05000410/LER-2D1993-2D010-2C_-3Aon_931108-2CHPCS_Was_Inoperable_Due_to_Equipment_Deficiency-2CInadequate_Managerial_Methods_-26_Poor_Work_Practices.Replaced_Deficient_Contactors…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000410/LER-1993-010, :on 931108,HPCS Was Inoperable Due to Equipment Deficiency,Inadequate Managerial Methods & Poor Work Practices.Replaced Deficient Contactors & Restored Tap Setting.Also Reportable Per Part 21

Or Headset Jack Installed
type: Subject
label: 05000410/LER-1987-025, :on 870519,secondary Containment Isolation Signal Generated Due to Technician Relanding Lifted Lead Prematurely.Caused by Breakdown in Communications.Gaitronics Phone &/Or Headset Jack Installed
page: https://kanterella.com/05000410/LER-2D1987-2D025-2C_-3Aon_870519-2Csecondary_Containment_Isolation_Signal_Generated_Due_to_Technician_Relanding_Lifted_Lead_Prematurely.Caused_by_Breakdown_in_Communica…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000410/LER-1987-025, :on 870519,secondary Containment Isolation Signal Generated Due to Technician Relanding Lifted Lead Prematurely.Caused by Breakdown in Communications.Gaitronics Phone &/Or Headset Jack Installed

LER-1988-008-04, :on 881221,reactor Protection Sys Circuit Protector Tripped,Deenergizing Bus 3B & Causing Half Scram. Caused by Voltage Fluctuations in MG 3B Set Resulting in Pitting on Contact Surfaces.Protectors Reset
type: Subject
label: 05000296/LER-1988-008-04, :on 881221,reactor Protection Sys Circuit Protector Tripped,Deenergizing Bus 3B & Causing Half Scram. Caused by Voltage Fluctuations in MG 3B Set Resulting in Pitting on Contact Surfaces.Protectors Reset
page: https://kanterella.com/05000296/LER-2D1988-2D008-2D04-2C_-3Aon_881221-2Creactor_Protection_Sys_Circuit_Protector_Tripped-2CDeenergizing_Bus_3B_-26_Causing_Half_Scram._Caused_by_Voltage_Fluctuations_in…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000296/LER-1988-008-04, :on 881221,reactor Protection Sys Circuit Protector Tripped,Deenergizing Bus 3B & Causing Half Scram. Caused by Voltage Fluctuations in MG 3B Set Resulting in Pitting on Contact Surfaces.Protectors Reset

05000296/LER-1988-002-03, :on 880811,unplanned RWCU Isolation Occurred. Caused by Personnel Error.Temp Indicating Switch Recalibr & Sys Returned to Svc
type: Subject
page: https://kanterella.com/05000296/LER-2D1988-2D002-2D03-2C_-3Aon_880811-2Cunplanned_RWCU_Isolation_Occurred._Caused_by_Personnel_Error.Temp_Indicating_Switch_Recalibr_-26_Sys_Returned_to_Svc
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000296/LER-1988-002-03, :on 880811,unplanned RWCU Isolation Occurred. Caused by Personnel Error.Temp Indicating Switch Recalibr & Sys Returned to Svc

LER-1988-007-04, :on 880929,diesel Generator 3C Overheated Due to Inadvertent Isolation of Emergency Equipment Cooling Water.Caused by Valve Misalignment & Error in Flow Diagrams.Surveillance Instruction Revised
type: Subject
label: 05000296/LER-1988-007-04, :on 880929,diesel Generator 3C Overheated Due to Inadvertent Isolation of Emergency Equipment Cooling Water.Caused by Valve Misalignment & Error in Flow Diagrams.Surveillance Instruction Revised
page: https://kanterella.com/05000296/LER-2D1988-2D007-2D04-2C_-3Aon_880929-2Cdiesel_Generator_3C_Overheated_Due_to_Inadvertent_Isolation_of_Emergency_Equipment_Cooling_Water.Caused_by_Valve_Misalignment_-2…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000296/LER-1988-007-04, :on 880929,diesel Generator 3C Overheated Due to Inadvertent Isolation of Emergency Equipment Cooling Water.Caused by Valve Misalignment & Error in Flow Diagrams.Surveillance Instruction Revised

LER-1988-001-04, :on 880605,breakers Connecting Diesel Generators 3A,3C & 3D to 4 Kv Shutdown Boards Opened Just After Closing & Would Not Reclose.Caused by Open Signal Sealed in Logic.Also Reportable Per Part 21
type: Subject
label: 05000296/LER-1988-001-04, :on 880605,breakers Connecting Diesel Generators 3A,3C & 3D to 4 Kv Shutdown Boards Opened Just After Closing & Would Not Reclose.Caused by Open Signal Sealed in Logic.Also Reportable Per Part 21
page: https://kanterella.com/05000296/LER-2D1988-2D001-2D04-2C_-3Aon_880605-2Cbreakers_Connecting_Diesel_Generators_3A-2C3C_-26_3D_to_4_Kv_Shutdown_Boards_Opened_Just_After_Closing_-26_Would_Not_Reclose.Cau…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000296/LER-1988-001-04, :on 880605,breakers Connecting Diesel Generators 3A,3C & 3D to 4 Kv Shutdown Boards Opened Just After Closing & Would Not Reclose.Caused by Open Signal Sealed in Logic.Also Reportable Per Part 21

LER-1989-003, :on 890307,unplanned ESF Actuations Occurred. Caused by Voltage Transient Due to Start of Control Bay Chiller 3B Because of Design of Circuit Protectors Being Sensitive to Minor Electrical Disturbances
type: Subject
label: 05000296/LER-1989-003, :on 890307,unplanned ESF Actuations Occurred. Caused by Voltage Transient Due to Start of Control Bay Chiller 3B Because of Design of Circuit Protectors Being Sensitive to Minor Electrical Disturbances
page: https://kanterella.com/05000296/LER-2D1989-2D003-2C_-3Aon_890307-2Cunplanned_ESF_Actuations_Occurred._Caused_by_Voltage_Transient_Due_to_Start_of_Control_Bay_Chiller_3B_Because_of_Design_of_Circuit_Pr…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000296/LER-1989-003, :on 890307,unplanned ESF Actuations Occurred. Caused by Voltage Transient Due to Start of Control Bay Chiller 3B Because of Design of Circuit Protectors Being Sensitive to Minor Electrical Disturbances

LER-1988-004-03, :on 880909,discovered That air-operated Temp Control Valves for Shutdown Board Room Air Handling Units Will Fail on Loss of Control Air.Caused by Inadequate Interface Review.Flow Diagram Revised
type: Subject
label: 05000296/LER-1988-004-03, :on 880909,discovered That air-operated Temp Control Valves for Shutdown Board Room Air Handling Units Will Fail on Loss of Control Air.Caused by Inadequate Interface Review.Flow Diagram Revised
page: https://kanterella.com/05000296/LER-2D1988-2D004-2D03-2C_-3Aon_880909-2Cdiscovered_That_air-2Doperated_Temp_Control_Valves_for_Shutdown_Board_Room_Air_Handling_Units_Will_Fail_on_Loss_of_Control_Air.C…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000296/LER-1988-004-03, :on 880909,discovered That air-operated Temp Control Valves for Shutdown Board Room Air Handling Units Will Fail on Loss of Control Air.Caused by Inadequate Interface Review.Flow Diagram Revised

LER-1987-019, :on 870412,manual Plant Trip Initiated Due to Loss of Feedwater Trains & Decreasing Steam Generator Levels.Caused by Condensate Pump High Temp Trip.Pressure & Steam Generator Levels Restored
type: Subject
label: 05000400/LER-1987-019, :on 870412,manual Plant Trip Initiated Due to Loss of Feedwater Trains & Decreasing Steam Generator Levels.Caused by Condensate Pump High Temp Trip.Pressure & Steam Generator Levels Restored
page: https://kanterella.com/05000400/LER-2D1987-2D019-2C_-3Aon_870412-2Cmanual_Plant_Trip_Initiated_Due_to_Loss_of_Feedwater_Trains_-26_Decreasing_Steam_Generator_Levels.Caused_by_Condensate_Pump_High_Temp…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1987-019, :on 870412,manual Plant Trip Initiated Due to Loss of Feedwater Trains & Decreasing Steam Generator Levels.Caused by Condensate Pump High Temp Trip.Pressure & Steam Generator Levels Restored

LER-1987-021, :on 870414,circulating Water Sys Flow to Main Condenser Restricted,Resulting in High Condensate Temps,Trip of Both Feedwater Trains & Manual Trip of Turbine & Reactor. Caused by Debris on Pump Suction Screens
type: Subject
label: 05000400/LER-1987-021, :on 870414,circulating Water Sys Flow to Main Condenser Restricted,Resulting in High Condensate Temps,Trip of Both Feedwater Trains & Manual Trip of Turbine & Reactor. Caused by Debris on Pump Suction Screens
page: https://kanterella.com/05000400/LER-2D1987-2D021-2C_-3Aon_870414-2Ccirculating_Water_Sys_Flow_to_Main_Condenser_Restricted-2CResulting_in_High_Condensate_Temps-2CTrip_of_Both_Feedwater_Trains_-26_Manu…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1987-021, :on 870414,circulating Water Sys Flow to Main Condenser Restricted,Resulting in High Condensate Temps,Trip of Both Feedwater Trains & Manual Trip of Turbine & Reactor. Caused by Debris on Pump Suction Screens

LER-1992-007-02, :on 920712,automatic Turbine Trip & Reactor Trip Occurred Due to Failure of Low Pressure Turbine Exhaust Boot Seal.Repairs to Low Pressure Turbine Exhaust Boot Seal Completed on 920713
type: Subject
label: 05000400/LER-1992-007-02, :on 920712,automatic Turbine Trip & Reactor Trip Occurred Due to Failure of Low Pressure Turbine Exhaust Boot Seal.Repairs to Low Pressure Turbine Exhaust Boot Seal Completed on 920713
page: https://kanterella.com/05000400/LER-2D1992-2D007-2D02-2C_-3Aon_920712-2Cautomatic_Turbine_Trip_-26_Reactor_Trip_Occurred_Due_to_Failure_of_Low_Pressure_Turbine_Exhaust_Boot_Seal.Repairs_to_Low_Pressur…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1992-007-02, :on 920712,automatic Turbine Trip & Reactor Trip Occurred Due to Failure of Low Pressure Turbine Exhaust Boot Seal.Repairs to Low Pressure Turbine Exhaust Boot Seal Completed on 920713

05000400/LER-1990-022-01, :on 901108,missed Surveillance Test for Secondary Waste Sample Tank Due to Incorrect Procedure Rev
type: Subject
page: https://kanterella.com/05000400/LER-2D1990-2D022-2D01-2C_-3Aon_901108-2Cmissed_Surveillance_Test_for_Secondary_Waste_Sample_Tank_Due_to_Incorrect_Procedure_Rev
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1990-022-01, :on 901108,missed Surveillance Test for Secondary Waste Sample Tank Due to Incorrect Procedure Rev

LER-1990-013, :on 900503,valve Misalignment Caused Unplanned Release from Waste Gas Sys to Waste Process Bldg Vent Stack 5.Valve Position Corrected,Procedures Changed & Training of Personnel Initiated
type: Subject
label: 05000400/LER-1990-013, :on 900503,valve Misalignment Caused Unplanned Release from Waste Gas Sys to Waste Process Bldg Vent Stack 5.Valve Position Corrected,Procedures Changed & Training of Personnel Initiated
page: https://kanterella.com/05000400/LER-2D1990-2D013-2C_-3Aon_900503-2Cvalve_Misalignment_Caused_Unplanned_Release_from_Waste_Gas_Sys_to_Waste_Process_Bldg_Vent_Stack_5.Valve_Position_Corrected-2CProcedur…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1990-013, :on 900503,valve Misalignment Caused Unplanned Release from Waste Gas Sys to Waste Process Bldg Vent Stack 5.Valve Position Corrected,Procedures Changed & Training of Personnel Initiated

LER-1989-021-02, :on 891227,ESFAS Actuation Occurred Due to Loss of Main Feedwater Pump.Caused by Personnel Error.Sampling Valve Repaired,Appropriate Procedure Revised & Applicable Personnel Trained on low-flow Trips
type: Subject
label: 05000400/LER-1989-021-02, :on 891227,ESFAS Actuation Occurred Due to Loss of Main Feedwater Pump.Caused by Personnel Error.Sampling Valve Repaired,Appropriate Procedure Revised & Applicable Personnel Trained on low-flow Trips
page: https://kanterella.com/05000400/LER-2D1989-2D021-2D02-2C_-3Aon_891227-2CESFAS_Actuation_Occurred_Due_to_Loss_of_Main_Feedwater_Pump.Caused_by_Personnel_Error.Sampling_Valve_Repaired-2CAppropriate_Proc…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1989-021-02, :on 891227,ESFAS Actuation Occurred Due to Loss of Main Feedwater Pump.Caused by Personnel Error.Sampling Valve Repaired,Appropriate Procedure Revised & Applicable Personnel Trained on low-flow Trips

LER-1990-006, :on 900309,discovered That Evolution Violated Requirements of FSAR to Keep Individual Tanks Isolated from Another Tank.Caused by Failure to Address Evolution in Operating Procedure.Procedure Revised
type: Subject
label: 05000400/LER-1990-006, :on 900309,discovered That Evolution Violated Requirements of FSAR to Keep Individual Tanks Isolated from Another Tank.Caused by Failure to Address Evolution in Operating Procedure.Procedure Revised
page: https://kanterella.com/05000400/LER-2D1990-2D006-2C_-3Aon_900309-2Cdiscovered_That_Evolution_Violated_Requirements_of_FSAR_to_Keep_Individual_Tanks_Isolated_from_Another_Tank.Caused_by_Failure_to_Addr…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1990-006, :on 900309,discovered That Evolution Violated Requirements of FSAR to Keep Individual Tanks Isolated from Another Tank.Caused by Failure to Address Evolution in Operating Procedure.Procedure Revised

LER-1990-014, :on 900516,discovered That Two Liquid Radioactive Releases Initiated on 900513 Were in Excess of Flow Rate Specified on Release Permits.Caused by Personnel Error.Max Release Rate Must Be Recorded
type: Subject
label: 05000400/LER-1990-014, :on 900516,discovered That Two Liquid Radioactive Releases Initiated on 900513 Were in Excess of Flow Rate Specified on Release Permits.Caused by Personnel Error.Max Release Rate Must Be Recorded
page: https://kanterella.com/05000400/LER-2D1990-2D014-2C_-3Aon_900516-2Cdiscovered_That_Two_Liquid_Radioactive_Releases_Initiated_on_900513_Were_in_Excess_of_Flow_Rate_Specified_on_Release_Permits.Caused_b…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1990-014, :on 900516,discovered That Two Liquid Radioactive Releases Initiated on 900513 Were in Excess of Flow Rate Specified on Release Permits.Caused by Personnel Error.Max Release Rate Must Be Recorded

Plant Process Computer.Caused by Failure to Restart Program That Performs Sump Leak Rate Calculations & Data Transmission Error.Computer Sys Will Be Upgraded
type: Subject
label: 05000400/LER-1992-002-02, :on 920119,problems Encountered W/Plant Process Computer.Caused by Failure to Restart Program That Performs Sump Leak Rate Calculations & Data Transmission Error.Computer Sys Will Be Upgraded
page: https://kanterella.com/05000400/LER-2D1992-2D002-2D02-2C_-3Aon_920119-2Cproblems_Encountered_W/Plant_Process_Computer.Caused_by_Failure_to_Restart_Program_That_Performs_Sump_Leak_Rate_Calculations_-26…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1992-002-02, :on 920119,problems Encountered W/Plant Process Computer.Caused by Failure to Restart Program That Performs Sump Leak Rate Calculations & Data Transmission Error.Computer Sys Will Be Upgraded

No Radioactivity Detected.Procedure Revised
type: Subject
label: 05000400/LER-1989-012-01, :on 890630,required Continuous Sampling of Release of Secondary Waste Sample Tank Not Performed.Caused by Personnel Error.Grab Sample of Secondary Waste Analyzed W/No Radioactivity Detected.Procedure Revised
page: https://kanterella.com/05000400/LER-2D1989-2D012-2D01-2C_-3Aon_890630-2Crequired_Continuous_Sampling_of_Release_of_Secondary_Waste_Sample_Tank_Not_Performed.Caused_by_Personnel_Error.Grab_Sample_of_Se…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1989-012-01, :on 890630,required Continuous Sampling of Release of Secondary Waste Sample Tank Not Performed.Caused by Personnel Error.Grab Sample of Secondary Waste Analyzed W/No Radioactivity Detected.Procedure Revised

LER-1989-008-01, :on 890410,deficiencies Discovered in Testing of Thermal Overload Bypass Circuit for motor-operated Valve. Caused by Procedural Inadequacies Which Resulted in Insufficient Testing of Circuit
type: Subject
label: 05000400/LER-1989-008-01, :on 890410,deficiencies Discovered in Testing of Thermal Overload Bypass Circuit for motor-operated Valve. Caused by Procedural Inadequacies Which Resulted in Insufficient Testing of Circuit
page: https://kanterella.com/05000400/LER-2D1989-2D008-2D01-2C_-3Aon_890410-2Cdeficiencies_Discovered_in_Testing_of_Thermal_Overload_Bypass_Circuit_for_motor-2Doperated_Valve._Caused_by_Procedural_Inadequac…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1989-008-01, :on 890410,deficiencies Discovered in Testing of Thermal Overload Bypass Circuit for motor-operated Valve. Caused by Procedural Inadequacies Which Resulted in Insufficient Testing of Circuit

LER-1989-009-01, :on 890501,discovered That Monitoring for Radioactivity in Turbine Bldg Floor Drain Effluent Not Performed from 890429-30.Caused by Isolation of Sample Collection Path for Calibr of Detector
type: Subject
label: 05000400/LER-1989-009-01, :on 890501,discovered That Monitoring for Radioactivity in Turbine Bldg Floor Drain Effluent Not Performed from 890429-30.Caused by Isolation of Sample Collection Path for Calibr of Detector
page: https://kanterella.com/05000400/LER-2D1989-2D009-2D01-2C_-3Aon_890501-2Cdiscovered_That_Monitoring_for_Radioactivity_in_Turbine_Bldg_Floor_Drain_Effluent_Not_Performed_from_890429-2D30.Caused_by_Isola…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1989-009-01, :on 890501,discovered That Monitoring for Radioactivity in Turbine Bldg Floor Drain Effluent Not Performed from 890429-30.Caused by Isolation of Sample Collection Path for Calibr of Detector

Feedwater Flow Mismatch Occurred During Calibr Test Procedure.Caused by Performance of Section of Procedure Intended to Be Conducted.Procedure Revised
type: Subject
label: 05000400/LER-1989-005-01, :on 890222,reactor Trip on Low Steam Generator Level W/Steam/Feedwater Flow Mismatch Occurred During Calibr Test Procedure.Caused by Performance of Section of Procedure Intended to Be Conducted.Procedure Revised
page: https://kanterella.com/05000400/LER-2D1989-2D005-2D01-2C_-3Aon_890222-2Creactor_Trip_on_Low_Steam_Generator_Level_W/Steam/Feedwater_Flow_Mismatch_Occurred_During_Calibr_Test_Procedure.Caused_by_Perfor…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1989-005-01, :on 890222,reactor Trip on Low Steam Generator Level W/Steam/Feedwater Flow Mismatch Occurred During Calibr Test Procedure.Caused by Performance of Section of Procedure Intended to Be Conducted.Procedure Revised

LER-1988-030, :on 881008,steam Generator Pressure in turbine- Driven Auxiliary Feedwater Pump Steam Supply Heater Noted. Caused by Inadequate Shift Turnover During Valve Repair During Outage.Valve Seated Properly
type: Subject
label: 05000400/LER-1988-030, :on 881008,steam Generator Pressure in turbine- Driven Auxiliary Feedwater Pump Steam Supply Heater Noted. Caused by Inadequate Shift Turnover During Valve Repair During Outage.Valve Seated Properly
page: https://kanterella.com/05000400/LER-2D1988-2D030-2C_-3Aon_881008-2Csteam_Generator_Pressure_in_turbine-2D_Driven_Auxiliary_Feedwater_Pump_Steam_Supply_Heater_Noted._Caused_by_Inadequate_Shift_Turnover…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1988-030, :on 881008,steam Generator Pressure in turbine- Driven Auxiliary Feedwater Pump Steam Supply Heater Noted. Caused by Inadequate Shift Turnover During Valve Repair During Outage.Valve Seated Properly

LER-1990-016, :on 900529,invalid Testing of Fuel Handling Bldg Emergency Exhaust Filtration Unit Occurred.Caused by Inadequate Location of Duct Flowrate Measurements.Test Procedure for Filtration Units Will Be Revised
type: Subject
label: 05000400/LER-1990-016, :on 900529,invalid Testing of Fuel Handling Bldg Emergency Exhaust Filtration Unit Occurred.Caused by Inadequate Location of Duct Flowrate Measurements.Test Procedure for Filtration Units Will Be Revised
page: https://kanterella.com/05000400/LER-2D1990-2D016-2C_-3Aon_900529-2Cinvalid_Testing_of_Fuel_Handling_Bldg_Emergency_Exhaust_Filtration_Unit_Occurred.Caused_by_Inadequate_Location_of_Duct_Flowrate_Measu…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1990-016, :on 900529,invalid Testing of Fuel Handling Bldg Emergency Exhaust Filtration Unit Occurred.Caused by Inadequate Location of Duct Flowrate Measurements.Test Procedure for Filtration Units Will Be Revised

LER-1988-026, :on 880831,cracking of Insulation on Wires & on Terminal Blocks in Top Works Portion of Valves Noted.On 880909 Concluded Valves Inside Containment Not Qualified for Harsh Environ Following Postulated Accident
type: Subject
label: 05000400/LER-1988-026, :on 880831,cracking of Insulation on Wires & on Terminal Blocks in Top Works Portion of Valves Noted.On 880909 Concluded Valves Inside Containment Not Qualified for Harsh Environ Following Postulated Accident
page: https://kanterella.com/05000400/LER-2D1988-2D026-2C_-3Aon_880831-2Ccracking_of_Insulation_on_Wires_-26_on_Terminal_Blocks_in_Top_Works_Portion_of_Valves_Noted.On_880909_Concluded_Valves_Inside_Contain…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1988-026, :on 880831,cracking of Insulation on Wires & on Terminal Blocks in Top Works Portion of Valves Noted.On 880909 Concluded Valves Inside Containment Not Qualified for Harsh Environ Following Postulated Accident

LER-1988-029, :on 880915,short Equipment Start Pulses Generated,Causing Safety injection,motor-driven Auxiliary Feedwater & Emergency Svc Water Pumps to Start.Caused by Failure of Relay in Sequencer Test Circuit
type: Subject
label: 05000400/LER-1988-029, :on 880915,short Equipment Start Pulses Generated,Causing Safety injection,motor-driven Auxiliary Feedwater & Emergency Svc Water Pumps to Start.Caused by Failure of Relay in Sequencer Test Circuit
page: https://kanterella.com/05000400/LER-2D1988-2D029-2C_-3Aon_880915-2Cshort_Equipment_Start_Pulses_Generated-2CCausing_Safety_injection-2Cmotor-2Ddriven_Auxiliary_Feedwater_-26_Emergency_Svc_Water_Pumps_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1988-029, :on 880915,short Equipment Start Pulses Generated,Causing Safety injection,motor-driven Auxiliary Feedwater & Emergency Svc Water Pumps to Start.Caused by Failure of Relay in Sequencer Test Circuit

LER-1987-053, :on 870813,valve 1BD-11 Discovered Inoperable After Failing Inservice Insp Test.Caused by Valve Failure Due to Binding of Carbon Seal Rings Between Valve Cage & Valve Plug.Valve Repaired
type: Subject
label: 05000400/LER-1987-053, :on 870813,valve 1BD-11 Discovered Inoperable After Failing Inservice Insp Test.Caused by Valve Failure Due to Binding of Carbon Seal Rings Between Valve Cage & Valve Plug.Valve Repaired
page: https://kanterella.com/05000400/LER-2D1987-2D053-2C_-3Aon_870813-2Cvalve_1BD-2D11_Discovered_Inoperable_After_Failing_Inservice_Insp_Test.Caused_by_Valve_Failure_Due_to_Binding_of_Carbon_Seal_Rings_Be…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1987-053, :on 870813,valve 1BD-11 Discovered Inoperable After Failing Inservice Insp Test.Caused by Valve Failure Due to Binding of Carbon Seal Rings Between Valve Cage & Valve Plug.Valve Repaired

LER-1987-061, :on 871016,flow Rate Instruments for Waste Processing Bldg Vent Stacks 5 & 5A Declared Inoperable. Caused by Personnel Error.Meeting Held to Discuss Similar Event.Operator Involved Counseled on Item
type: Subject
label: 05000400/LER-1987-061, :on 871016,flow Rate Instruments for Waste Processing Bldg Vent Stacks 5 & 5A Declared Inoperable. Caused by Personnel Error.Meeting Held to Discuss Similar Event.Operator Involved Counseled on Item
page: https://kanterella.com/05000400/LER-2D1987-2D061-2C_-3Aon_871016-2Cflow_Rate_Instruments_for_Waste_Processing_Bldg_Vent_Stacks_5_-26_5A_Declared_Inoperable._Caused_by_Personnel_Error.Meeting_Held_to_D…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1987-061, :on 871016,flow Rate Instruments for Waste Processing Bldg Vent Stacks 5 & 5A Declared Inoperable. Caused by Personnel Error.Meeting Held to Discuss Similar Event.Operator Involved Counseled on Item

LER-1987-054, :on 870915,determined That More Limiting Single Failure Might Exist & on 870916,two Addl Potential Failure Modes Identified & Plant Shut Down.Caused by Design Error. Solid State Protection Sys Modified
type: Subject
label: 05000400/LER-1987-054, :on 870915,determined That More Limiting Single Failure Might Exist & on 870916,two Addl Potential Failure Modes Identified & Plant Shut Down.Caused by Design Error. Solid State Protection Sys Modified
page: https://kanterella.com/05000400/LER-2D1987-2D054-2C_-3Aon_870915-2Cdetermined_That_More_Limiting_Single_Failure_Might_Exist_-26_on_870916-2Ctwo_Addl_Potential_Failure_Modes_Identified_-26_Plant_Shut_D…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1987-054, :on 870915,determined That More Limiting Single Failure Might Exist & on 870916,two Addl Potential Failure Modes Identified & Plant Shut Down.Caused by Design Error. Solid State Protection Sys Modified

LER-1988-001-02, :on 880115,emergency Operating Procedure (EOP) Deficiency for Switchover to Recirculation After LOCA Discovered.Caused by Failure to Incorporate FSAR Change Into Plant Procedures.Eops Revised
type: Subject
label: 05000400/LER-1988-001-02, :on 880115,emergency Operating Procedure (EOP) Deficiency for Switchover to Recirculation After LOCA Discovered.Caused by Failure to Incorporate FSAR Change Into Plant Procedures.Eops Revised
page: https://kanterella.com/05000400/LER-2D1988-2D001-2D02-2C_-3Aon_880115-2Cemergency_Operating_Procedure_-28EOP-29_Deficiency_for_Switchover_to_Recirculation_After_LOCA_Discovered.Caused_by_Failure_to_In…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1988-001-02, :on 880115,emergency Operating Procedure (EOP) Deficiency for Switchover to Recirculation After LOCA Discovered.Caused by Failure to Incorporate FSAR Change Into Plant Procedures.Eops Revised

LER-1987-028, :on 870502,manual Turbine Trip Initiated During Performance of Power Ascension Test Procedure 9108-S-14. Caused by Tandem Trip of Both Heater Drain Pumps.Evaluation of Feedwater Response to Transients Continues
type: Subject
label: 05000400/LER-1987-028, :on 870502,manual Turbine Trip Initiated During Performance of Power Ascension Test Procedure 9108-S-14. Caused by Tandem Trip of Both Heater Drain Pumps.Evaluation of Feedwater Response to Transients Continues
page: https://kanterella.com/05000400/LER-2D1987-2D028-2C_-3Aon_870502-2Cmanual_Turbine_Trip_Initiated_During_Performance_of_Power_Ascension_Test_Procedure_9108-2DS-2D14._Caused_by_Tandem_Trip_of_Both_Heate…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1987-028, :on 870502,manual Turbine Trip Initiated During Performance of Power Ascension Test Procedure 9108-S-14. Caused by Tandem Trip of Both Heater Drain Pumps.Evaluation of Feedwater Response to Transients Continues

LER-1987-048, :on 870811,failure to Take 9:30 Am Reading of Axial Flux Difference (Afd) as Required by Tech Specs Discovered.Caused by Personnel Error.Operator Disciplined. Addl Guidance Being Provided to Operators
type: Subject
label: 05000400/LER-1987-048, :on 870811,failure to Take 9:30 Am Reading of Axial Flux Difference (Afd) as Required by Tech Specs Discovered.Caused by Personnel Error.Operator Disciplined. Addl Guidance Being Provided to Operators
page: https://kanterella.com/05000400/LER-2D1987-2D048-2C_-3Aon_870811-2Cfailure_to_Take_9-3A30_Am_Reading_of_Axial_Flux_Difference_-28Afd-29_as_Required_by_Tech_Specs_Discovered.Caused_by_Personnel_Error.O…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1987-048, :on 870811,failure to Take 9:30 Am Reading of Axial Flux Difference (Afd) as Required by Tech Specs Discovered.Caused by Personnel Error.Operator Disciplined. Addl Guidance Being Provided to Operators

LER-1987-027, :on 870426,during Test,Redundant Transmitter Pressurizer Pressure Channels Declared Inoperable.Caused by Two Out of Three Channels Out of Calibr & Reading Low. Channels Recalibr & Test Completed
type: Subject
label: 05000400/LER-1987-027, :on 870426,during Test,Redundant Transmitter Pressurizer Pressure Channels Declared Inoperable.Caused by Two Out of Three Channels Out of Calibr & Reading Low. Channels Recalibr & Test Completed
page: https://kanterella.com/05000400/LER-2D1987-2D027-2C_-3Aon_870426-2Cduring_Test-2CRedundant_Transmitter_Pressurizer_Pressure_Channels_Declared_Inoperable.Caused_by_Two_Out_of_Three_Channels_Out_of_Cali…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1987-027, :on 870426,during Test,Redundant Transmitter Pressurizer Pressure Channels Declared Inoperable.Caused by Two Out of Three Channels Out of Calibr & Reading Low. Channels Recalibr & Test Completed

LER-1987-034, :on 870611,air Leakage by Inner & Outer Doors of Personnel Air Lock Excessive.Caused by Flat Spots on O-ring Seal.Seals on Inner & Outer Doors Replaced & Procedure OMM-001 Revised
type: Subject
label: 05000400/LER-1987-034, :on 870611,air Leakage by Inner & Outer Doors of Personnel Air Lock Excessive.Caused by Flat Spots on O-ring Seal.Seals on Inner & Outer Doors Replaced & Procedure OMM-001 Revised
page: https://kanterella.com/05000400/LER-2D1987-2D034-2C_-3Aon_870611-2Cair_Leakage_by_Inner_-26_Outer_Doors_of_Personnel_Air_Lock_Excessive.Caused_by_Flat_Spots_on_O-2Dring_Seal.Seals_on_Inner_-26_Outer_D…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1987-034, :on 870611,air Leakage by Inner & Outer Doors of Personnel Air Lock Excessive.Caused by Flat Spots on O-ring Seal.Seals on Inner & Outer Doors Replaced & Procedure OMM-001 Revised

Engine Barring Device Not Rotating Engine as Required Using Plant Svc Air. Caused by Low Plant Svc Air Pressure.Mod Installed Attaching Engine Barring Device to Starting Air Tank Air
type: Subject
label: 05000400/LER-1987-033, :on 870607,experienced Trouble W/Engine Barring Device Not Rotating Engine as Required Using Plant Svc Air. Caused by Low Plant Svc Air Pressure.Mod Installed Attaching Engine Barring Device to Starting Air Tank Air
page: https://kanterella.com/05000400/LER-2D1987-2D033-2C_-3Aon_870607-2Cexperienced_Trouble_W/Engine_Barring_Device_Not_Rotating_Engine_as_Required_Using_Plant_Svc_Air._Caused_by_Low_Plant_Svc_Air_Pressure…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1987-033, :on 870607,experienced Trouble W/Engine Barring Device Not Rotating Engine as Required Using Plant Svc Air. Caused by Low Plant Svc Air Pressure.Mod Installed Attaching Engine Barring Device to Starting Air Tank Air

LER-1987-012, :on 870311,turbine & Reactor Trips Occurred During Troubleshooting at Main Turbine Supervisory Control Panel.Turbine Trip Caused by Depressing Test Push Button on Turbine Supervisory Control Panel
type: Subject
label: 05000400/LER-1987-012, :on 870311,turbine & Reactor Trips Occurred During Troubleshooting at Main Turbine Supervisory Control Panel.Turbine Trip Caused by Depressing Test Push Button on Turbine Supervisory Control Panel
page: https://kanterella.com/05000400/LER-2D1987-2D012-2C_-3Aon_870311-2Cturbine_-26_Reactor_Trips_Occurred_During_Troubleshooting_at_Main_Turbine_Supervisory_Control_Panel.Turbine_Trip_Caused_by_Depressing…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1987-012, :on 870311,turbine & Reactor Trips Occurred During Troubleshooting at Main Turbine Supervisory Control Panel.Turbine Trip Caused by Depressing Test Push Button on Turbine Supervisory Control Panel

LER-1988-005-01, :on 880201,discovered That Two Valves for Turbine Bldg Vent Stack 3A Wide Range Gas Monitor Were Mispositioned.Caused by Procedural Deficiency.Valve Lineup for Monitor Skid Corrected
type: Subject
label: 05000400/LER-1988-005-01, :on 880201,discovered That Two Valves for Turbine Bldg Vent Stack 3A Wide Range Gas Monitor Were Mispositioned.Caused by Procedural Deficiency.Valve Lineup for Monitor Skid Corrected
page: https://kanterella.com/05000400/LER-2D1988-2D005-2D01-2C_-3Aon_880201-2Cdiscovered_That_Two_Valves_for_Turbine_Bldg_Vent_Stack_3A_Wide_Range_Gas_Monitor_Were_Mispositioned.Caused_by_Procedural_Deficie…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1988-005-01, :on 880201,discovered That Two Valves for Turbine Bldg Vent Stack 3A Wide Range Gas Monitor Were Mispositioned.Caused by Procedural Deficiency.Valve Lineup for Monitor Skid Corrected

Overcurrent Relay. Overcurrent Relay Replaced & Emergency Safeguards Sequencer Sys Test Procedure Revised
type: Subject
label: 05000400/LER-1988-008, :on 880217,emergency Svc Water Pump Started Then Tripped.Caused by Problem W/Overcurrent Relay. Overcurrent Relay Replaced & Emergency Safeguards Sequencer Sys Test Procedure Revised
page: https://kanterella.com/05000400/LER-2D1988-2D008-2C_-3Aon_880217-2Cemergency_Svc_Water_Pump_Started_Then_Tripped.Caused_by_Problem_W/Overcurrent_Relay._Overcurrent_Relay_Replaced_-26_Emergency_Safegua…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1988-008, :on 880217,emergency Svc Water Pump Started Then Tripped.Caused by Problem W/Overcurrent Relay. Overcurrent Relay Replaced & Emergency Safeguards Sequencer Sys Test Procedure Revised

LER-1987-065, :on 871124,P-13 Channel Declared Inoperable Due to Incorrect First Stage Turbine Pressure Setpoints for P-13 Permissive.Caused by Personnel Error.Applicable Compensatory Action & Plant Change Request Initiated
type: Subject
label: 05000400/LER-1987-065, :on 871124,P-13 Channel Declared Inoperable Due to Incorrect First Stage Turbine Pressure Setpoints for P-13 Permissive.Caused by Personnel Error.Applicable Compensatory Action & Plant Change Request Initiated
page: https://kanterella.com/05000400/LER-2D1987-2D065-2C_-3Aon_871124-2CP-2D13_Channel_Declared_Inoperable_Due_to_Incorrect_First_Stage_Turbine_Pressure_Setpoints_for_P-2D13_Permissive.Caused_by_Personnel_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1987-065, :on 871124,P-13 Channel Declared Inoperable Due to Incorrect First Stage Turbine Pressure Setpoints for P-13 Permissive.Caused by Personnel Error.Applicable Compensatory Action & Plant Change Request Initiated

Unblock Switch for Both Trains of SI Outside Design Basis. Caused by Inadequate Original Plant Design.Info Re Potential Single Failure Mode Provided to Personnel
type: Subject
label: 05000250/LER-1989-018, :on 891212,use of Single Manual SI Block/ Unblock Switch for Both Trains of SI Outside Design Basis. Caused by Inadequate Original Plant Design.Info Re Potential Single Failure Mode Provided to Personnel
page: https://kanterella.com/05000250/LER-2D1989-2D018-2C_-3Aon_891212-2Cuse_of_Single_Manual_SI_Block/_Unblock_Switch_for_Both_Trains_of_SI_Outside_Design_Basis._Caused_by_Inadequate_Original_Plant_Design.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1989-018, :on 891212,use of Single Manual SI Block/ Unblock Switch for Both Trains of SI Outside Design Basis. Caused by Inadequate Original Plant Design.Info Re Potential Single Failure Mode Provided to Personnel

Shift Supervisor
type: Subject
label: 05000250/LER-1990-019, :on 901003,alarm Received on Control Room Annunciator X-7/6 Indicating Heat Tracing Trouble.Caused by Inadequate Work Control.Boric Acid Transfer Pumps Aligned & Event Discussed W/Shift Supervisor
page: https://kanterella.com/05000250/LER-2D1990-2D019-2C_-3Aon_901003-2Calarm_Received_on_Control_Room_Annunciator_X-2D7/6_Indicating_Heat_Tracing_Trouble.Caused_by_Inadequate_Work_Control.Boric_Acid_Trans…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1990-019, :on 901003,alarm Received on Control Room Annunciator X-7/6 Indicating Heat Tracing Trouble.Caused by Inadequate Work Control.Boric Acid Transfer Pumps Aligned & Event Discussed W/Shift Supervisor

LER-1990-006-02, :on 900705,automatic Start of Component Cooling Water Pump 4B Occurred Due to Low Pump Discharge Header Pressure.Caused by Personnel Error.Responsible Individual Required to Review Procedure
type: Subject
label: 05000251/LER-1990-006-02, :on 900705,automatic Start of Component Cooling Water Pump 4B Occurred Due to Low Pump Discharge Header Pressure.Caused by Personnel Error.Responsible Individual Required to Review Procedure
page: https://kanterella.com/05000251/LER-2D1990-2D006-2D02-2C_-3Aon_900705-2Cautomatic_Start_of_Component_Cooling_Water_Pump_4B_Occurred_Due_to_Low_Pump_Discharge_Header_Pressure.Caused_by_Personnel_Error.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000251/LER-1990-006-02, :on 900705,automatic Start of Component Cooling Water Pump 4B Occurred Due to Low Pump Discharge Header Pressure.Caused by Personnel Error.Responsible Individual Required to Review Procedure

05000251/LER-1990-007-02, :on 900726,component Cooling Water Pump 4A Automatically Started.Caused by Error Made by Nonlicensed Personnel.Pressure Controller PC-4-611 Recalibrated
type: Subject
page: https://kanterella.com/05000251/LER-2D1990-2D007-2D02-2C_-3Aon_900726-2Ccomponent_Cooling_Water_Pump_4A_Automatically_Started.Caused_by_Error_Made_by_Nonlicensed_Personnel.Pressure_Controller_PC-2D4-2…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000251/LER-1990-007-02, :on 900726,component Cooling Water Pump 4A Automatically Started.Caused by Error Made by Nonlicensed Personnel.Pressure Controller PC-4-611 Recalibrated

LER-1988-021, :on 880913,pressurizer PORV Stroke Time Exceeded Tech Spec Design Basis Value of 3.0 for Heat Input Case.Caused by Undersized Air & Nitrogen Backup Supply Line to Actuators.Procedures Revised
type: Subject
label: 05000250/LER-1988-021, :on 880913,pressurizer PORV Stroke Time Exceeded Tech Spec Design Basis Value of 3.0 for Heat Input Case.Caused by Undersized Air & Nitrogen Backup Supply Line to Actuators.Procedures Revised
page: https://kanterella.com/05000250/LER-2D1988-2D021-2C_-3Aon_880913-2Cpressurizer_PORV_Stroke_Time_Exceeded_Tech_Spec_Design_Basis_Value_of_3.0_for_Heat_Input_Case.Caused_by_Undersized_Air_-26_Nitrogen_B…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1988-021, :on 880913,pressurizer PORV Stroke Time Exceeded Tech Spec Design Basis Value of 3.0 for Heat Input Case.Caused by Undersized Air & Nitrogen Backup Supply Line to Actuators.Procedures Revised

LER-1988-013, :on 880707,discovered That Monthly Channel Functional Test Surveillance Procedure Did Not Check Sys Alarm.Caused by Personnel Error.Surveillance Procedure Corrected & Personnel Counseled
type: Subject
label: 05000250/LER-1988-013, :on 880707,discovered That Monthly Channel Functional Test Surveillance Procedure Did Not Check Sys Alarm.Caused by Personnel Error.Surveillance Procedure Corrected & Personnel Counseled
page: https://kanterella.com/05000250/LER-2D1988-2D013-2C_-3Aon_880707-2Cdiscovered_That_Monthly_Channel_Functional_Test_Surveillance_Procedure_Did_Not_Check_Sys_Alarm.Caused_by_Personnel_Error.Surveillance…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1988-013, :on 880707,discovered That Monthly Channel Functional Test Surveillance Procedure Did Not Check Sys Alarm.Caused by Personnel Error.Surveillance Procedure Corrected & Personnel Counseled

LER-1988-022, :on 880920,emergency Diesel Generator a Declared out-of-svc Due to High Fuel Oil Pressure.Diesel Generator B out-of-svc Since 880917.Caused by Excessive Particles in Filter.Filter Replaced
type: Subject
label: 05000250/LER-1988-022, :on 880920,emergency Diesel Generator a Declared out-of-svc Due to High Fuel Oil Pressure.Diesel Generator B out-of-svc Since 880917.Caused by Excessive Particles in Filter.Filter Replaced
page: https://kanterella.com/05000250/LER-2D1988-2D022-2C_-3Aon_880920-2Cemergency_Diesel_Generator_a_Declared_out-2Dof-2Dsvc_Due_to_High_Fuel_Oil_Pressure.Diesel_Generator_B_out-2Dof-2Dsvc_Since_880917.Cau…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1988-022, :on 880920,emergency Diesel Generator a Declared out-of-svc Due to High Fuel Oil Pressure.Diesel Generator B out-of-svc Since 880917.Caused by Excessive Particles in Filter.Filter Replaced

LER-1989-002, :on 890116,normal Plant Cooldown Initiated Due to Small Boundary Leak of Rcs.Caused by Transgranular Stress Corrosion Cracking in Mapping Sys Thimble Guide Tube J-12 & J-7.Guide Tubes Involved Repaired or Replaced
type: Subject
label: 05000250/LER-1989-002, :on 890116,normal Plant Cooldown Initiated Due to Small Boundary Leak of Rcs.Caused by Transgranular Stress Corrosion Cracking in Mapping Sys Thimble Guide Tube J-12 & J-7.Guide Tubes Involved Repaired or Replaced
page: https://kanterella.com/05000250/LER-2D1989-2D002-2C_-3Aon_890116-2Cnormal_Plant_Cooldown_Initiated_Due_to_Small_Boundary_Leak_of_Rcs.Caused_by_Transgranular_Stress_Corrosion_Cracking_in_Mapping_Sys_Th…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1989-002, :on 890116,normal Plant Cooldown Initiated Due to Small Boundary Leak of Rcs.Caused by Transgranular Stress Corrosion Cracking in Mapping Sys Thimble Guide Tube J-12 & J-7.Guide Tubes Involved Repaired or Replaced

LER-1987-030, :on 871027,determined That Existing Min Recirculation Design Configuration for RHR Sys Potentially Inadequate.Recirculation Flow Path for RHR Pumps Original Design of Plant.Mods Developed
type: Subject
label: 05000250/LER-1987-030, :on 871027,determined That Existing Min Recirculation Design Configuration for RHR Sys Potentially Inadequate.Recirculation Flow Path for RHR Pumps Original Design of Plant.Mods Developed
page: https://kanterella.com/05000250/LER-2D1987-2D030-2C_-3Aon_871027-2Cdetermined_That_Existing_Min_Recirculation_Design_Configuration_for_RHR_Sys_Potentially_Inadequate.Recirculation_Flow_Path_for_RHR_Pu…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1987-030, :on 871027,determined That Existing Min Recirculation Design Configuration for RHR Sys Potentially Inadequate.Recirculation Flow Path for RHR Pumps Original Design of Plant.Mods Developed

LER-1987-013, :on 870514,Tech Spec Required Surveillance of Spent Fuel Pit Exhaust Monitor Missed.Caused by Personnel Error.Procedure O-PMI-67.11 Will Be Revised & Other Surveillance Procedures Will Be Reviewed
type: Subject
label: 05000250/LER-1987-013, :on 870514,Tech Spec Required Surveillance of Spent Fuel Pit Exhaust Monitor Missed.Caused by Personnel Error.Procedure O-PMI-67.11 Will Be Revised & Other Surveillance Procedures Will Be Reviewed
page: https://kanterella.com/05000250/LER-2D1987-2D013-2C_-3Aon_870514-2CTech_Spec_Required_Surveillance_of_Spent_Fuel_Pit_Exhaust_Monitor_Missed.Caused_by_Personnel_Error.Procedure_O-2DPMI-2D67.11_Will_Be_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1987-013, :on 870514,Tech Spec Required Surveillance of Spent Fuel Pit Exhaust Monitor Missed.Caused by Personnel Error.Procedure O-PMI-67.11 Will Be Revised & Other Surveillance Procedures Will Be Reviewed

LER-1988-009, :on 880527,determined That Tech Spec Surveillances for Station Battery Pilot Cell Rotation Not Properly Implemented in 1987.Caused by Personnel Error & Procedure Inadequacy.Training Bulletin Issued
type: Subject
label: 05000250/LER-1988-009, :on 880527,determined That Tech Spec Surveillances for Station Battery Pilot Cell Rotation Not Properly Implemented in 1987.Caused by Personnel Error & Procedure Inadequacy.Training Bulletin Issued
page: https://kanterella.com/05000250/LER-2D1988-2D009-2C_-3Aon_880527-2Cdetermined_That_Tech_Spec_Surveillances_for_Station_Battery_Pilot_Cell_Rotation_Not_Properly_Implemented_in_1987.Caused_by_Personnel_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1988-009, :on 880527,determined That Tech Spec Surveillances for Station Battery Pilot Cell Rotation Not Properly Implemented in 1987.Caused by Personnel Error & Procedure Inadequacy.Training Bulletin Issued

05000250/LER-1987-016, :on 870526,while in Mode 6,partial Actuation of Train a Safeguards Equipment Occurred.Caused by Sticking Safety Injection Block Switch.Switch Inspected,Cleaned & Returned to Svc
type: Subject
page: https://kanterella.com/05000250/LER-2D1987-2D016-2C_-3Aon_870526-2Cwhile_in_Mode_6-2Cpartial_Actuation_of_Train_a_Safeguards_Equipment_Occurred.Caused_by_Sticking_Safety_Injection_Block_Switch.Switch_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1987-016, :on 870526,while in Mode 6,partial Actuation of Train a Safeguards Equipment Occurred.Caused by Sticking Safety Injection Block Switch.Switch Inspected,Cleaned & Returned to Svc

LER-1987-007-01, :on 870310,air Leakage During Leak Rate Testing of Personnel Hatch Exceeded Tech Spec Requirements.Caused by Malfunctioning Equilizing Valve Not Being Able to Fully Close.Valve Replaced
type: Subject
label: 05000251/LER-1987-007-01, :on 870310,air Leakage During Leak Rate Testing of Personnel Hatch Exceeded Tech Spec Requirements.Caused by Malfunctioning Equilizing Valve Not Being Able to Fully Close.Valve Replaced
page: https://kanterella.com/05000251/LER-2D1987-2D007-2D01-2C_-3Aon_870310-2Cair_Leakage_During_Leak_Rate_Testing_of_Personnel_Hatch_Exceeded_Tech_Spec_Requirements.Caused_by_Malfunctioning_Equilizing_Valv…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000251/LER-1987-007-01, :on 870310,air Leakage During Leak Rate Testing of Personnel Hatch Exceeded Tech Spec Requirements.Caused by Malfunctioning Equilizing Valve Not Being Able to Fully Close.Valve Replaced

No Visible Level Resulting in No Flow Path to Rcs. Caused by Design of Boric Acid Transfer Pump Double Seals. Review Continuing for Alternate Seal Design
type: Subject
label: 05000251/LER-1989-009-01, :on 890823,boric Acid Transfer Pump Seal Pot Found W/No Visible Level Resulting in No Flow Path to Rcs. Caused by Design of Boric Acid Transfer Pump Double Seals. Review Continuing for Alternate Seal Design
page: https://kanterella.com/05000251/LER-2D1989-2D009-2D01-2C_-3Aon_890823-2Cboric_Acid_Transfer_Pump_Seal_Pot_Found_W/No_Visible_Level_Resulting_in_No_Flow_Path_to_Rcs._Caused_by_Design_of_Boric_Acid_Tran…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000251/LER-1989-009-01, :on 890823,boric Acid Transfer Pump Seal Pot Found W/No Visible Level Resulting in No Flow Path to Rcs. Caused by Design of Boric Acid Transfer Pump Double Seals. Review Continuing for Alternate Seal Design

05000250/LER-1988-027, :on 881006,mechanic Found to Be Contaminated When Exiting Containment Bldg.Specific Cause Unidentified. Addl Temporary Controls Implemented & Area Mopped
type: Subject
page: https://kanterella.com/05000250/LER-2D1988-2D027-2C_-3Aon_881006-2Cmechanic_Found_to_Be_Contaminated_When_Exiting_Containment_Bldg.Specific_Cause_Unidentified._Addl_Temporary_Controls_Implemented_-26_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1988-027, :on 881006,mechanic Found to Be Contaminated When Exiting Containment Bldg.Specific Cause Unidentified. Addl Temporary Controls Implemented & Area Mopped

LER-1988-029, :on 881121,specialist Accidently short- Circuited Power Terminal Lead Which Resulted in Closure of RHR Suction Isolation Valve MOV-3-750.Caused by Personnel Error.Personnel Briefed
type: Subject
label: 05000250/LER-1988-029, :on 881121,specialist Accidently short- Circuited Power Terminal Lead Which Resulted in Closure of RHR Suction Isolation Valve MOV-3-750.Caused by Personnel Error.Personnel Briefed
page: https://kanterella.com/05000250/LER-2D1988-2D029-2C_-3Aon_881121-2Cspecialist_Accidently_short-2D_Circuited_Power_Terminal_Lead_Which_Resulted_in_Closure_of_RHR_Suction_Isolation_Valve_MOV-2D3-2D750.C…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1988-029, :on 881121,specialist Accidently short- Circuited Power Terminal Lead Which Resulted in Closure of RHR Suction Isolation Valve MOV-3-750.Caused by Personnel Error.Personnel Briefed

LER-1988-012, :on 880614,QA Audit Caused Investigation Into Delay in Issuing Fire Protection Impairment Form for Four Penetration Seals in Switchgear Room.Caused by Inadequate Controls.Seal Surveillance Being Generated
type: Subject
label: 05000250/LER-1988-012, :on 880614,QA Audit Caused Investigation Into Delay in Issuing Fire Protection Impairment Form for Four Penetration Seals in Switchgear Room.Caused by Inadequate Controls.Seal Surveillance Being Generated
page: https://kanterella.com/05000250/LER-2D1988-2D012-2C_-3Aon_880614-2CQA_Audit_Caused_Investigation_Into_Delay_in_Issuing_Fire_Protection_Impairment_Form_for_Four_Penetration_Seals_in_Switchgear_Room.Cau…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1988-012, :on 880614,QA Audit Caused Investigation Into Delay in Issuing Fire Protection Impairment Form for Four Penetration Seals in Switchgear Room.Caused by Inadequate Controls.Seal Surveillance Being Generated

LER-1988-008, :on 880613,flowpath Which Could Result in Insufficient NPSH to Certain Pumps During LOCA Recirculation Identified.Procedures Revised to Maintain Valve 887 Locked in Fully Open Position
type: Subject
label: 05000250/LER-1988-008, :on 880613,flowpath Which Could Result in Insufficient NPSH to Certain Pumps During LOCA Recirculation Identified.Procedures Revised to Maintain Valve 887 Locked in Fully Open Position
page: https://kanterella.com/05000250/LER-2D1988-2D008-2C_-3Aon_880613-2Cflowpath_Which_Could_Result_in_Insufficient_NPSH_to_Certain_Pumps_During_LOCA_Recirculation_Identified.Procedures_Revised_to_Maintain…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1988-008, :on 880613,flowpath Which Could Result in Insufficient NPSH to Certain Pumps During LOCA Recirculation Identified.Procedures Revised to Maintain Valve 887 Locked in Fully Open Position

LER-1988-005-01, :on 880425,calibr of Nuclear Instrumentation Sys Power Range Detectors Performed Late.Caused by Personnel Error.Digital Data Processing Sys Repaired & Group Responsible for Performance Discussed Event
type: Subject
label: 05000251/LER-1988-005-01, :on 880425,calibr of Nuclear Instrumentation Sys Power Range Detectors Performed Late.Caused by Personnel Error.Digital Data Processing Sys Repaired & Group Responsible for Performance Discussed Event
page: https://kanterella.com/05000251/LER-2D1988-2D005-2D01-2C_-3Aon_880425-2Ccalibr_of_Nuclear_Instrumentation_Sys_Power_Range_Detectors_Performed_Late.Caused_by_Personnel_Error.Digital_Data_Processing_Sys…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000251/LER-1988-005-01, :on 880425,calibr of Nuclear Instrumentation Sys Power Range Detectors Performed Late.Caused by Personnel Error.Digital Data Processing Sys Repaired & Group Responsible for Performance Discussed Event

LER-1988-002-01, :on 880202,containment & Control Room Ventilation Isolation Occurred.Caused by Personnel Error While Performing Mod to Remove Remote Alarm Function.Planner & Technician Involved Counselled
type: Subject
label: 05000251/LER-1988-002-01, :on 880202,containment & Control Room Ventilation Isolation Occurred.Caused by Personnel Error While Performing Mod to Remove Remote Alarm Function.Planner & Technician Involved Counselled
page: https://kanterella.com/05000251/LER-2D1988-2D002-2D01-2C_-3Aon_880202-2Ccontainment_-26_Control_Room_Ventilation_Isolation_Occurred.Caused_by_Personnel_Error_While_Performing_Mod_to_Remove_Remote_Alar…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000251/LER-1988-002-01, :on 880202,containment & Control Room Ventilation Isolation Occurred.Caused by Personnel Error While Performing Mod to Remove Remote Alarm Function.Planner & Technician Involved Counselled

LER-1987-028, :on 871218,two Intake Cooling Water Pumps Declared Out of Svc Which Exceeded Limits of Tech Spec 3.4.5.Caused by Broken Lower Headshaft Coupling.Coupling Replaced & Pump Returned to Svc
type: Subject
label: 05000251/LER-1987-028, :on 871218,two Intake Cooling Water Pumps Declared Out of Svc Which Exceeded Limits of Tech Spec 3.4.5.Caused by Broken Lower Headshaft Coupling.Coupling Replaced & Pump Returned to Svc
page: https://kanterella.com/05000251/LER-2D1987-2D028-2C_-3Aon_871218-2Ctwo_Intake_Cooling_Water_Pumps_Declared_Out_of_Svc_Which_Exceeded_Limits_of_Tech_Spec_3.4.5.Caused_by_Broken_Lower_Headshaft_Coupling…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000251/LER-1987-028, :on 871218,two Intake Cooling Water Pumps Declared Out of Svc Which Exceeded Limits of Tech Spec 3.4.5.Caused by Broken Lower Headshaft Coupling.Coupling Replaced & Pump Returned to Svc

4-OP-47.1 Revised to Ensure That Valve 4627 Closed
type: Subject
label: 05000250/LER-1987-029, :on 871015,determined That Waste Gas Sys Operated in Configuration Not Described in Fsar.Caused by Inadequate Procedural Rev.Procedure 3/4-OP-47.1 Revised to Ensure That Valve 4627 Closed
page: https://kanterella.com/05000250/LER-2D1987-2D029-2C_-3Aon_871015-2Cdetermined_That_Waste_Gas_Sys_Operated_in_Configuration_Not_Described_in_Fsar.Caused_by_Inadequate_Procedural_Rev.Procedure_3/4-2DOP-…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1987-029, :on 871015,determined That Waste Gas Sys Operated in Configuration Not Described in Fsar.Caused by Inadequate Procedural Rev.Procedure 3/4-OP-47.1 Revised to Ensure That Valve 4627 Closed

LER-1987-028, :on 871015,discovered That Required Tech Spec Surveillance of Control Rod Positions Missed During Peak Shift on 870912.Caused by Personnel Error.Personnel Counseled.Logs Being Reviewed for Improvement
type: Subject
label: 05000250/LER-1987-028, :on 871015,discovered That Required Tech Spec Surveillance of Control Rod Positions Missed During Peak Shift on 870912.Caused by Personnel Error.Personnel Counseled.Logs Being Reviewed for Improvement
page: https://kanterella.com/05000250/LER-2D1987-2D028-2C_-3Aon_871015-2Cdiscovered_That_Required_Tech_Spec_Surveillance_of_Control_Rod_Positions_Missed_During_Peak_Shift_on_870912.Caused_by_Personnel_Error…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1987-028, :on 871015,discovered That Required Tech Spec Surveillance of Control Rod Positions Missed During Peak Shift on 870912.Caused by Personnel Error.Personnel Counseled.Logs Being Reviewed for Improvement

LER-1987-028-01, :on 871218,unit Shutdown Commenced When Two Intake Cooling Water Pumps Declared Inoperable.Caused by Broken Shaft Coupling & Frozen Bushing.Broken Shaft Coupling & 4B Icw Pump Replaced & Satisfactorily Tested
type: Subject
label: 05000251/LER-1987-028-01, :on 871218,unit Shutdown Commenced When Two Intake Cooling Water Pumps Declared Inoperable.Caused by Broken Shaft Coupling & Frozen Bushing.Broken Shaft Coupling & 4B Icw Pump Replaced & Satisfactorily Tested
page: https://kanterella.com/05000251/LER-2D1987-2D028-2D01-2C_-3Aon_871218-2Cunit_Shutdown_Commenced_When_Two_Intake_Cooling_Water_Pumps_Declared_Inoperable.Caused_by_Broken_Shaft_Coupling_-26_Frozen_Bushi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000251/LER-1987-028-01, :on 871218,unit Shutdown Commenced When Two Intake Cooling Water Pumps Declared Inoperable.Caused by Broken Shaft Coupling & Frozen Bushing.Broken Shaft Coupling & 4B Icw Pump Replaced & Satisfactorily Tested

LER-1987-014-01, :on 870711,dripping from Auxiliary Feedwater Steam Line Discovered.On 870714,leak Identified as Pinhole on Reducer.Cause Unknown.Fitting & Portion of Adjacent Piping Removed for Analysis
type: Subject
label: 05000251/LER-1987-014-01, :on 870711,dripping from Auxiliary Feedwater Steam Line Discovered.On 870714,leak Identified as Pinhole on Reducer.Cause Unknown.Fitting & Portion of Adjacent Piping Removed for Analysis
page: https://kanterella.com/05000251/LER-2D1987-2D014-2D01-2C_-3Aon_870711-2Cdripping_from_Auxiliary_Feedwater_Steam_Line_Discovered.On_870714-2Cleak_Identified_as_Pinhole_on_Reducer.Cause_Unknown.Fitting_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000251/LER-1987-014-01, :on 870711,dripping from Auxiliary Feedwater Steam Line Discovered.On 870714,leak Identified as Pinhole on Reducer.Cause Unknown.Fitting & Portion of Adjacent Piping Removed for Analysis

LER-1987-021-01, :on 870729,process Radiation Monitor Spiked High Actuating Containment Vent & Control Room Ventilation Isolation Logic.Caused by Work Being Performed on Condenser Air Ejector Radiation Monitor.Drawer Reset
type: Subject
label: 05000251/LER-1987-021-01, :on 870729,process Radiation Monitor Spiked High Actuating Containment Vent & Control Room Ventilation Isolation Logic.Caused by Work Being Performed on Condenser Air Ejector Radiation Monitor.Drawer Reset
page: https://kanterella.com/05000251/LER-2D1987-2D021-2D01-2C_-3Aon_870729-2Cprocess_Radiation_Monitor_Spiked_High_Actuating_Containment_Vent_-26_Control_Room_Ventilation_Isolation_Logic.Caused_by_Work_Bei…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000251/LER-1987-021-01, :on 870729,process Radiation Monitor Spiked High Actuating Containment Vent & Control Room Ventilation Isolation Logic.Caused by Work Being Performed on Condenser Air Ejector Radiation Monitor.Drawer Reset

LER-1987-012-02, :on 870705,during Unit 3 Engineered Safeguards Integration Test,Auto Start of Component Cooling Water Pump 4B Occurred.Caused by Low Header Pressure on Increased Cooling Water Flow.Procedure Will Be Enhanced
type: Subject
label: 05000251/LER-1987-012-02, :on 870705,during Unit 3 Engineered Safeguards Integration Test,Auto Start of Component Cooling Water Pump 4B Occurred.Caused by Low Header Pressure on Increased Cooling Water Flow.Procedure Will Be Enhanced
page: https://kanterella.com/05000251/LER-2D1987-2D012-2D02-2C_-3Aon_870705-2Cduring_Unit_3_Engineered_Safeguards_Integration_Test-2CAuto_Start_of_Component_Cooling_Water_Pump_4B_Occurred.Caused_by_Low_Head…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000251/LER-1987-012-02, :on 870705,during Unit 3 Engineered Safeguards Integration Test,Auto Start of Component Cooling Water Pump 4B Occurred.Caused by Low Header Pressure on Increased Cooling Water Flow.Procedure Will Be Enhanced

LER-1988-004, :on 880318,auxiliary Feedwater Pumps Actuated Due to Drop in Steam Generator Level.Caused by Reactor Control Operator Failure to Monitor Steam Generator Level. Operator Counseled Re Awareness of Actions
type: Subject
label: 05000250/LER-1988-004, :on 880318,auxiliary Feedwater Pumps Actuated Due to Drop in Steam Generator Level.Caused by Reactor Control Operator Failure to Monitor Steam Generator Level. Operator Counseled Re Awareness of Actions
page: https://kanterella.com/05000250/LER-2D1988-2D004-2C_-3Aon_880318-2Cauxiliary_Feedwater_Pumps_Actuated_Due_to_Drop_in_Steam_Generator_Level.Caused_by_Reactor_Control_Operator_Failure_to_Monitor_Steam_G…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1988-004, :on 880318,auxiliary Feedwater Pumps Actuated Due to Drop in Steam Generator Level.Caused by Reactor Control Operator Failure to Monitor Steam Generator Level. Operator Counseled Re Awareness of Actions

O Running Flux Map or Reducing Overpressure,Overtemp Occurred. Caused by Personnel Error.Personnel Counseled
type: Subject
label: 05000251/LER-1987-018-01, :on 870712,operation in Excess of 24 H W/Greater than 2% Calculated Quadrant Power Tilt Ratio W/O Running Flux Map or Reducing Overpressure,Overtemp Occurred. Caused by Personnel Error.Personnel Counseled
page: https://kanterella.com/05000251/LER-2D1987-2D018-2D01-2C_-3Aon_870712-2Coperation_in_Excess_of_24_H_W/Greater_than_2-_Calculated_Quadrant_Power_Tilt_Ratio_W/O_Running_Flux_Map_or_Reducing_Overpressure…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000251/LER-1987-018-01, :on 870712,operation in Excess of 24 H W/Greater than 2% Calculated Quadrant Power Tilt Ratio W/O Running Flux Map or Reducing Overpressure,Overtemp Occurred. Caused by Personnel Error.Personnel Counseled

LER-1987-011-02, :on 870608,automatic Actuation of Component Cooling Water Pump 4C Occurred.Caused by Low Sys Pressure Due to Leak in 4A Component Cooling Water Hx.Hx Removed from Operation & Leak Repaired
type: Subject
label: 05000251/LER-1987-011-02, :on 870608,automatic Actuation of Component Cooling Water Pump 4C Occurred.Caused by Low Sys Pressure Due to Leak in 4A Component Cooling Water Hx.Hx Removed from Operation & Leak Repaired
page: https://kanterella.com/05000251/LER-2D1987-2D011-2D02-2C_-3Aon_870608-2Cautomatic_Actuation_of_Component_Cooling_Water_Pump_4C_Occurred.Caused_by_Low_Sys_Pressure_Due_to_Leak_in_4A_Component_Cooling_W…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000251/LER-1987-011-02, :on 870608,automatic Actuation of Component Cooling Water Pump 4C Occurred.Caused by Low Sys Pressure Due to Leak in 4A Component Cooling Water Hx.Hx Removed from Operation & Leak Repaired

LER-1987-008-01, :on 870722,ESF Actuation Occurred Due to Extreme High Level in Steam Generator 24.Caused by Erratic Response of Main Feedwater Pump Delta P Controller. Plant Procedures Implemented
type: Subject
label: 05000316/LER-1987-008-01, :on 870722,ESF Actuation Occurred Due to Extreme High Level in Steam Generator 24.Caused by Erratic Response of Main Feedwater Pump Delta P Controller. Plant Procedures Implemented
page: https://kanterella.com/05000316/LER-2D1987-2D008-2D01-2C_-3Aon_870722-2CESF_Actuation_Occurred_Due_to_Extreme_High_Level_in_Steam_Generator_24.Caused_by_Erratic_Response_of_Main_Feedwater_Pump_Delta_P…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000316/LER-1987-008-01, :on 870722,ESF Actuation Occurred Due to Extreme High Level in Steam Generator 24.Caused by Erratic Response of Main Feedwater Pump Delta P Controller. Plant Procedures Implemented

Damper Seals
type: Subject
label: 05000315/LER-1994-008, :on 940129,determined That Filter System Was Inoperable.Caused by Debris on Fan Unit Bypass Damper Sealing Area.Debris Was Removed & Affected Seals Made Good Contact W/Damper Seals
page: https://kanterella.com/05000315/LER-2D1994-2D008-2C_-3Aon_940129-2Cdetermined_That_Filter_System_Was_Inoperable.Caused_by_Debris_on_Fan_Unit_Bypass_Damper_Sealing_Area.Debris_Was_Removed_-26_Affected_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1994-008, :on 940129,determined That Filter System Was Inoperable.Caused by Debris on Fan Unit Bypass Damper Sealing Area.Debris Was Removed & Affected Seals Made Good Contact W/Damper Seals

Reactor Trip Occurred During Power Increase to 30- to Perform Routine Calometric Test.Caused by Failure to Reset Thrust Bearing Wear Detector Setpoint.Procedures to Be Drafted
type: Subject
label: 05000315/LER-1992-012, :on 921028,Turbine Trip/Reactor Trip Occurred During Power Increase to 30% to Perform Routine Calometric Test.Caused by Failure to Reset Thrust Bearing Wear Detector Setpoint.Procedures to Be Drafted
page: https://kanterella.com/05000315/LER-2D1992-2D012-2C_-3Aon_921028-2CTurbine_Trip/Reactor_Trip_Occurred_During_Power_Increase_to_30-_to_Perform_Routine_Calometric_Test.Caused_by_Failure_to_Reset_Thrust_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1992-012, :on 921028,Turbine Trip/Reactor Trip Occurred During Power Increase to 30% to Perform Routine Calometric Test.Caused by Failure to Reset Thrust Bearing Wear Detector Setpoint.Procedures to Be Drafted

LER-1991-009, :on 910927,discovered That CO2 pop-off Chain for Fire Damper Not Wired to CO2 Piping,Rendering Fire Damper Inoperable.Caused by Personnel Error.Wire Removed & Approved Clip Reattached to Chain
type: Subject
label: 05000315/LER-1991-009, :on 910927,discovered That CO2 pop-off Chain for Fire Damper Not Wired to CO2 Piping,Rendering Fire Damper Inoperable.Caused by Personnel Error.Wire Removed & Approved Clip Reattached to Chain
page: https://kanterella.com/05000315/LER-2D1991-2D009-2C_-3Aon_910927-2Cdiscovered_That_CO2_pop-2Doff_Chain_for_Fire_Damper_Not_Wired_to_CO2_Piping-2CRendering_Fire_Damper_Inoperable.Caused_by_Personnel_Er…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1991-009, :on 910927,discovered That CO2 pop-off Chain for Fire Damper Not Wired to CO2 Piping,Rendering Fire Damper Inoperable.Caused by Personnel Error.Wire Removed & Approved Clip Reattached to Chain

LER-1990-008, :on 900619,discovered That Isolation Relay Circuitry for Low Header Pressure Auto Start Switch for Essential Svc Water Pumps Installed Incorrectly.Caused by Design Errors.Plant Mod Packet Initiated
type: Subject
label: 05000315/LER-1990-008, :on 900619,discovered That Isolation Relay Circuitry for Low Header Pressure Auto Start Switch for Essential Svc Water Pumps Installed Incorrectly.Caused by Design Errors.Plant Mod Packet Initiated
page: https://kanterella.com/05000315/LER-2D1990-2D008-2C_-3Aon_900619-2Cdiscovered_That_Isolation_Relay_Circuitry_for_Low_Header_Pressure_Auto_Start_Switch_for_Essential_Svc_Water_Pumps_Installed_Incorrect…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1990-008, :on 900619,discovered That Isolation Relay Circuitry for Low Header Pressure Auto Start Switch for Essential Svc Water Pumps Installed Incorrectly.Caused by Design Errors.Plant Mod Packet Initiated

Operators
type: Subject
label: 05000315/LER-1989-015-01, :on 891128,pyralarm Fire Detection Zone 3 Made Inoperable When Welding in Laundry Room Caused Standing Alarm.Fire Watch Patrol Not Assigned within 1 H.Caused by Personnel Error.Event Reviewed W/Operators
page: https://kanterella.com/05000315/LER-2D1989-2D015-2D01-2C_-3Aon_891128-2Cpyralarm_Fire_Detection_Zone_3_Made_Inoperable_When_Welding_in_Laundry_Room_Caused_Standing_Alarm.Fire_Watch_Patrol_Not_Assigned…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1989-015-01, :on 891128,pyralarm Fire Detection Zone 3 Made Inoperable When Welding in Laundry Room Caused Standing Alarm.Fire Watch Patrol Not Assigned within 1 H.Caused by Personnel Error.Event Reviewed W/Operators

LER-1989-004, :on 890324,leakage Found on Containment Penetrations Exceeded Tech Spec 3.6.1.2.b Requirement.Caused by Excessive Leakage Rate of Valves WCR-924,ECR-26 & ECR-31. Faulty Valves Repaired & Restested
type: Subject
label: 05000315/LER-1989-004, :on 890324,leakage Found on Containment Penetrations Exceeded Tech Spec 3.6.1.2.b Requirement.Caused by Excessive Leakage Rate of Valves WCR-924,ECR-26 & ECR-31. Faulty Valves Repaired & Restested
page: https://kanterella.com/05000315/LER-2D1989-2D004-2C_-3Aon_890324-2Cleakage_Found_on_Containment_Penetrations_Exceeded_Tech_Spec_3.6.1.2.b_Requirement.Caused_by_Excessive_Leakage_Rate_of_Valves_WCR-2D9…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1989-004, :on 890324,leakage Found on Containment Penetrations Exceeded Tech Spec 3.6.1.2.b Requirement.Caused by Excessive Leakage Rate of Valves WCR-924,ECR-26 & ECR-31. Faulty Valves Repaired & Restested

LER-1989-008-01, :on 890420,power Range Neutron Flux Instrumentation Monthly Channel Functional Surveillance Test Procedures Do Not Satisfy Intent of Tech Spec 3.3.1.1.Caused by Lack of Specific Guidance.Rev Initiated
type: Subject
label: 05000315/LER-1989-008-01, :on 890420,power Range Neutron Flux Instrumentation Monthly Channel Functional Surveillance Test Procedures Do Not Satisfy Intent of Tech Spec 3.3.1.1.Caused by Lack of Specific Guidance.Rev Initiated
page: https://kanterella.com/05000315/LER-2D1989-2D008-2D01-2C_-3Aon_890420-2Cpower_Range_Neutron_Flux_Instrumentation_Monthly_Channel_Functional_Surveillance_Test_Procedures_Do_Not_Satisfy_Intent_of_Tech_S…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1989-008-01, :on 890420,power Range Neutron Flux Instrumentation Monthly Channel Functional Surveillance Test Procedures Do Not Satisfy Intent of Tech Spec 3.3.1.1.Caused by Lack of Specific Guidance.Rev Initiated

LER-1990-004-01, :on 900508,reactor Operator Inadvertently Started Containment Recirculation Fan Instead of Hydrogen Recombiner During Surveillance Test.Caused by Inadequate Work Practice.Condenser Restored
type: Subject
label: 05000315/LER-1990-004-01, :on 900508,reactor Operator Inadvertently Started Containment Recirculation Fan Instead of Hydrogen Recombiner During Surveillance Test.Caused by Inadequate Work Practice.Condenser Restored
page: https://kanterella.com/05000315/LER-2D1990-2D004-2D01-2C_-3Aon_900508-2Creactor_Operator_Inadvertently_Started_Containment_Recirculation_Fan_Instead_of_Hydrogen_Recombiner_During_Surveillance_Test.Cau…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1990-004-01, :on 900508,reactor Operator Inadvertently Started Containment Recirculation Fan Instead of Hydrogen Recombiner During Surveillance Test.Caused by Inadequate Work Practice.Condenser Restored

LER-1989-011-01, :on 890901,discovered Snubber Installed on Pressurizer Spray Line Not Tested Since Aug 1987.Caused by Failure to Include Snubber on Testing Job Order.Procedure Changed to Add Two Separate Steps
type: Subject
label: 05000315/LER-1989-011-01, :on 890901,discovered Snubber Installed on Pressurizer Spray Line Not Tested Since Aug 1987.Caused by Failure to Include Snubber on Testing Job Order.Procedure Changed to Add Two Separate Steps
page: https://kanterella.com/05000315/LER-2D1989-2D011-2D01-2C_-3Aon_890901-2Cdiscovered_Snubber_Installed_on_Pressurizer_Spray_Line_Not_Tested_Since_Aug_1987.Caused_by_Failure_to_Include_Snubber_on_Testing…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1989-011-01, :on 890901,discovered Snubber Installed on Pressurizer Spray Line Not Tested Since Aug 1987.Caused by Failure to Include Snubber on Testing Job Order.Procedure Changed to Add Two Separate Steps

LER-1988-007-01, :on 880908,flow Passage Insp of Ice Condenser Revealed Frost & Ice Buildup.Caused by Sublimation of Ice or High Humidity in Containment Air.Flow Passages Manually Cleaned to Remove Accessible Frost
type: Subject
label: 05000315/LER-1988-007-01, :on 880908,flow Passage Insp of Ice Condenser Revealed Frost & Ice Buildup.Caused by Sublimation of Ice or High Humidity in Containment Air.Flow Passages Manually Cleaned to Remove Accessible Frost
page: https://kanterella.com/05000315/LER-2D1988-2D007-2D01-2C_-3Aon_880908-2Cflow_Passage_Insp_of_Ice_Condenser_Revealed_Frost_-26_Ice_Buildup.Caused_by_Sublimation_of_Ice_or_High_Humidity_in_Containment_A…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1988-007-01, :on 880908,flow Passage Insp of Ice Condenser Revealed Frost & Ice Buildup.Caused by Sublimation of Ice or High Humidity in Containment Air.Flow Passages Manually Cleaned to Remove Accessible Frost

Expansion Gap Seals Should Have Been Included in Formal Fire Seal Insp Program.Caused by Failure to Recognize Seals as Requiring Surveillance Per Tech Specs
type: Subject
label: 05000315/LER-1989-010-01, :on 890705,determined That 414 Seismic/ Expansion Gap Seals Should Have Been Included in Formal Fire Seal Insp Program.Caused by Failure to Recognize Seals as Requiring Surveillance Per Tech Specs
page: https://kanterella.com/05000315/LER-2D1989-2D010-2D01-2C_-3Aon_890705-2Cdetermined_That_414_Seismic/_Expansion_Gap_Seals_Should_Have_Been_Included_in_Formal_Fire_Seal_Insp_Program.Caused_by_Failure_to…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1989-010-01, :on 890705,determined That 414 Seismic/ Expansion Gap Seals Should Have Been Included in Formal Fire Seal Insp Program.Caused by Failure to Recognize Seals as Requiring Surveillance Per Tech Specs

Procedural Noncompliance.Administrative Actions Re Involved Individuals Taken
type: Subject
label: 05000315/LER-1988-005, :on 880705,two CO2 Protected Areas Isolated W/O Compensatory Action Required Per Tech Specs.Caused by Personnel Error/Procedural Noncompliance.Administrative Actions Re Involved Individuals Taken
page: https://kanterella.com/05000315/LER-2D1988-2D005-2C_-3Aon_880705-2Ctwo_CO2_Protected_Areas_Isolated_W/O_Compensatory_Action_Required_Per_Tech_Specs.Caused_by_Personnel_Error/Procedural_Noncompliance.A…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1988-005, :on 880705,two CO2 Protected Areas Isolated W/O Compensatory Action Required Per Tech Specs.Caused by Personnel Error/Procedural Noncompliance.Administrative Actions Re Involved Individuals Taken

LER-1990-013-01, :on 901215,during Tech Spec Surveillance,Plant Battery Declared Inoperable When Single Cell Voltage Decreased Below Test Limit.Caused by Improper Setpoint. Setpoints Verified & Corrected as Needed
type: Subject
label: 05000316/LER-1990-013-01, :on 901215,during Tech Spec Surveillance,Plant Battery Declared Inoperable When Single Cell Voltage Decreased Below Test Limit.Caused by Improper Setpoint. Setpoints Verified & Corrected as Needed
page: https://kanterella.com/05000316/LER-2D1990-2D013-2D01-2C_-3Aon_901215-2Cduring_Tech_Spec_Surveillance-2CPlant_Battery_Declared_Inoperable_When_Single_Cell_Voltage_Decreased_Below_Test_Limit.Caused_by_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000316/LER-1990-013-01, :on 901215,during Tech Spec Surveillance,Plant Battery Declared Inoperable When Single Cell Voltage Decreased Below Test Limit.Caused by Improper Setpoint. Setpoints Verified & Corrected as Needed

Breaker Coordination.Caused by Improper Application of Selectivity Ratios
type: Subject
label: 05000315/LER-1987-024, :on 871229,deficient Design Discovered Which Could Result in Failure to Provide Proper Local Shutdown & Indication Panel Fuse/Breaker Coordination.Caused by Improper Application of Selectivity Ratios
page: https://kanterella.com/05000315/LER-2D1987-2D024-2C_-3Aon_871229-2Cdeficient_Design_Discovered_Which_Could_Result_in_Failure_to_Provide_Proper_Local_Shutdown_-26_Indication_Panel_Fuse/Breaker_Coordina…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1987-024, :on 871229,deficient Design Discovered Which Could Result in Failure to Provide Proper Local Shutdown & Indication Panel Fuse/Breaker Coordination.Caused by Improper Application of Selectivity Ratios

LER-1989-011, :on 890613,discrepancies Determined to Have Rendered Sys Outside of Design Basis Error Allowances During post-accident Conditions.Caused by Failure to Install Outer Heat Shrink.Splice Boxes Corrected
type: Subject
label: 05000316/LER-1989-011, :on 890613,discrepancies Determined to Have Rendered Sys Outside of Design Basis Error Allowances During post-accident Conditions.Caused by Failure to Install Outer Heat Shrink.Splice Boxes Corrected
page: https://kanterella.com/05000316/LER-2D1989-2D011-2C_-3Aon_890613-2Cdiscrepancies_Determined_to_Have_Rendered_Sys_Outside_of_Design_Basis_Error_Allowances_During_post-2Daccident_Conditions.Caused_by_Fa…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000316/LER-1989-011, :on 890613,discrepancies Determined to Have Rendered Sys Outside of Design Basis Error Allowances During post-accident Conditions.Caused by Failure to Install Outer Heat Shrink.Splice Boxes Corrected

LER-1989-013, :on 890617,reactor Trip Breakers Opened When ESF Signal Initiated from Set I,Intermediate Range Nuclear Instrumentation Channel.Caused by Miscommunication. Importance of Complete Turnover Stressed
type: Subject
label: 05000316/LER-1989-013, :on 890617,reactor Trip Breakers Opened When ESF Signal Initiated from Set I,Intermediate Range Nuclear Instrumentation Channel.Caused by Miscommunication. Importance of Complete Turnover Stressed
page: https://kanterella.com/05000316/LER-2D1989-2D013-2C_-3Aon_890617-2Creactor_Trip_Breakers_Opened_When_ESF_Signal_Initiated_from_Set_I-2CIntermediate_Range_Nuclear_Instrumentation_Channel.Caused_by_Misc…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000316/LER-1989-013, :on 890617,reactor Trip Breakers Opened When ESF Signal Initiated from Set I,Intermediate Range Nuclear Instrumentation Channel.Caused by Miscommunication. Importance of Complete Turnover Stressed

LER-1989-009, :on 890705,disovered That Testing Document for Valve 1-CS-443-2 Not Signed Off.Record Search Conducted & No Evidence Found to Indicate That post-maint Testing Performed.Caused by Personnel Error
type: Subject
label: 05000315/LER-1989-009, :on 890705,disovered That Testing Document for Valve 1-CS-443-2 Not Signed Off.Record Search Conducted & No Evidence Found to Indicate That post-maint Testing Performed.Caused by Personnel Error
page: https://kanterella.com/05000315/LER-2D1989-2D009-2C_-3Aon_890705-2Cdisovered_That_Testing_Document_for_Valve_1-2DCS-2D443-2D2_Not_Signed_Off.Record_Search_Conducted_-26_No_Evidence_Found_to_Indicate_T…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1989-009, :on 890705,disovered That Testing Document for Valve 1-CS-443-2 Not Signed Off.Record Search Conducted & No Evidence Found to Indicate That post-maint Testing Performed.Caused by Personnel Error

LER-1989-003-01, :on 890318,ESF Actuation Occurred.Caused by Standing High Flux Trip on Intermediate Range Nuclear Instrumentation Channel I Which Had Not Reset Prior to Power Dropping Below Permissive P-10
type: Subject
label: 05000315/LER-1989-003-01, :on 890318,ESF Actuation Occurred.Caused by Standing High Flux Trip on Intermediate Range Nuclear Instrumentation Channel I Which Had Not Reset Prior to Power Dropping Below Permissive P-10
page: https://kanterella.com/05000315/LER-2D1989-2D003-2D01-2C_-3Aon_890318-2CESF_Actuation_Occurred.Caused_by_Standing_High_Flux_Trip_on_Intermediate_Range_Nuclear_Instrumentation_Channel_I_Which_Had_Not_R…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1989-003-01, :on 890318,ESF Actuation Occurred.Caused by Standing High Flux Trip on Intermediate Range Nuclear Instrumentation Channel I Which Had Not Reset Prior to Power Dropping Below Permissive P-10

LER-1987-015-01, :on 871120,facility Entered Tech Spec 3.0.3 Due to Corrective Maint.Caused by Time Needed to Repair Separated Voltage Cable Connector Broken Due to Frequent Use.Connector Replaced
type: Subject
label: 05000316/LER-1987-015-01, :on 871120,facility Entered Tech Spec 3.0.3 Due to Corrective Maint.Caused by Time Needed to Repair Separated Voltage Cable Connector Broken Due to Frequent Use.Connector Replaced
page: https://kanterella.com/05000316/LER-2D1987-2D015-2D01-2C_-3Aon_871120-2Cfacility_Entered_Tech_Spec_3.0.3_Due_to_Corrective_Maint.Caused_by_Time_Needed_to_Repair_Separated_Voltage_Cable_Connector_Broke…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000316/LER-1987-015-01, :on 871120,facility Entered Tech Spec 3.0.3 Due to Corrective Maint.Caused by Time Needed to Repair Separated Voltage Cable Connector Broken Due to Frequent Use.Connector Replaced

LER-1987-014-01, :on 871215,programming Error Causing Alarm to Be Inoperable,Discovered.Caused by Personnel Error.Computer Operators Counseled in Proper Method of Computer Software Troubleshooting & Program Installation
type: Subject
label: 05000316/LER-1987-014-01, :on 871215,programming Error Causing Alarm to Be Inoperable,Discovered.Caused by Personnel Error.Computer Operators Counseled in Proper Method of Computer Software Troubleshooting & Program Installation
page: https://kanterella.com/05000316/LER-2D1987-2D014-2D01-2C_-3Aon_871215-2Cprogramming_Error_Causing_Alarm_to_Be_Inoperable-2CDiscovered.Caused_by_Personnel_Error.Computer_Operators_Counseled_in_Proper_M…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000316/LER-1987-014-01, :on 871215,programming Error Causing Alarm to Be Inoperable,Discovered.Caused by Personnel Error.Computer Operators Counseled in Proper Method of Computer Software Troubleshooting & Program Installation

Tech Specs.Caused by Personnel Error.Procedures Updated to List Required Sampling Frequencies & Analysis for Sys
type: Subject
label: 05000315/LER-1988-012, :on 881111,turbine Room Sump Not Sampled & Analyzed in Accordance W/Tech Specs.Caused by Personnel Error.Procedures Updated to List Required Sampling Frequencies & Analysis for Sys
page: https://kanterella.com/05000315/LER-2D1988-2D012-2C_-3Aon_881111-2Cturbine_Room_Sump_Not_Sampled_-26_Analyzed_in_Accordance_W/Tech_Specs.Caused_by_Personnel_Error.Procedures_Updated_to_List_Required_S…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1988-012, :on 881111,turbine Room Sump Not Sampled & Analyzed in Accordance W/Tech Specs.Caused by Personnel Error.Procedures Updated to List Required Sampling Frequencies & Analysis for Sys

LER-1988-010, :on 881011,unit Shut Down After Determination That Electrical Cables Not Configured Per Design Drawings. Caused by Pressurizer & Reactor Head Vent Valves Not Being in Configuration.Design Change Initiated
type: Subject
label: 05000315/LER-1988-010, :on 881011,unit Shut Down After Determination That Electrical Cables Not Configured Per Design Drawings. Caused by Pressurizer & Reactor Head Vent Valves Not Being in Configuration.Design Change Initiated
page: https://kanterella.com/05000315/LER-2D1988-2D010-2C_-3Aon_881011-2Cunit_Shut_Down_After_Determination_That_Electrical_Cables_Not_Configured_Per_Design_Drawings._Caused_by_Pressurizer_-26_Reactor_Head_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1988-010, :on 881011,unit Shut Down After Determination That Electrical Cables Not Configured Per Design Drawings. Caused by Pressurizer & Reactor Head Vent Valves Not Being in Configuration.Design Change Initiated

LER-1989-003, :on 890119,valve Stem Seal Leak Allows Air Into Sensor Capillary Tubing Causing Reactor Vessel Level Indication Sys Calibr Shift.Caused by Leakage of High Point Fill Valve Stem Seals
type: Subject
label: 05000316/LER-1989-003, :on 890119,valve Stem Seal Leak Allows Air Into Sensor Capillary Tubing Causing Reactor Vessel Level Indication Sys Calibr Shift.Caused by Leakage of High Point Fill Valve Stem Seals
page: https://kanterella.com/05000316/LER-2D1989-2D003-2C_-3Aon_890119-2Cvalve_Stem_Seal_Leak_Allows_Air_Into_Sensor_Capillary_Tubing_Causing_Reactor_Vessel_Level_Indication_Sys_Calibr_Shift.Caused_by_Leaka…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000316/LER-1989-003, :on 890119,valve Stem Seal Leak Allows Air Into Sensor Capillary Tubing Causing Reactor Vessel Level Indication Sys Calibr Shift.Caused by Leakage of High Point Fill Valve Stem Seals

LER-1988-002-01, :on 880326,ice Buildup in Ice Condenser Flow Passages Declared Inoperable.Caused by Sublimation of Ice or High Humidity in Containment Air.Flow Passages Manually Cleaned to Remove Frost
type: Subject
label: 05000315/LER-1988-002-01, :on 880326,ice Buildup in Ice Condenser Flow Passages Declared Inoperable.Caused by Sublimation of Ice or High Humidity in Containment Air.Flow Passages Manually Cleaned to Remove Frost
page: https://kanterella.com/05000315/LER-2D1988-2D002-2D01-2C_-3Aon_880326-2Cice_Buildup_in_Ice_Condenser_Flow_Passages_Declared_Inoperable.Caused_by_Sublimation_of_Ice_or_High_Humidity_in_Containment_Air.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1988-002-01, :on 880326,ice Buildup in Ice Condenser Flow Passages Declared Inoperable.Caused by Sublimation of Ice or High Humidity in Containment Air.Flow Passages Manually Cleaned to Remove Frost

LER-1987-023-01, :on 871109 Problem Discovered Re Fuses Required for Isolation Between Local Shutdown & Indication Panels. Problems Confirmed on 871222.Caused by Engineer Design Oversight.Design Changes Made
type: Subject
label: 05000315/LER-1987-023-01, :on 871109 Problem Discovered Re Fuses Required for Isolation Between Local Shutdown & Indication Panels. Problems Confirmed on 871222.Caused by Engineer Design Oversight.Design Changes Made
page: https://kanterella.com/05000315/LER-2D1987-2D023-2D01-2C_-3Aon_871109_Problem_Discovered_Re_Fuses_Required_for_Isolation_Between_Local_Shutdown_-26_Indication_Panels._Problems_Confirmed_on_871222.Caus…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1987-023-01, :on 871109 Problem Discovered Re Fuses Required for Isolation Between Local Shutdown & Indication Panels. Problems Confirmed on 871222.Caused by Engineer Design Oversight.Design Changes Made

LER-1988-003-01, :on 880520,determined That Low Setpoint Trip Should Have Been time-response Tested.Probably Caused by Lack of Specific Detail in Tech Specs.Test Procedures Revised to Include Low Setpoint Testing
type: Subject
label: 05000315/LER-1988-003-01, :on 880520,determined That Low Setpoint Trip Should Have Been time-response Tested.Probably Caused by Lack of Specific Detail in Tech Specs.Test Procedures Revised to Include Low Setpoint Testing
page: https://kanterella.com/05000315/LER-2D1988-2D003-2D01-2C_-3Aon_880520-2Cdetermined_That_Low_Setpoint_Trip_Should_Have_Been_time-2Dresponse_Tested.Probably_Caused_by_Lack_of_Specific_Detail_in_Tech_Spe…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1988-003-01, :on 880520,determined That Low Setpoint Trip Should Have Been time-response Tested.Probably Caused by Lack of Specific Detail in Tech Specs.Test Procedures Revised to Include Low Setpoint Testing

Low Level on Steam Generator 11.Caused by Failure of East Main Feedwater Pump Shaft Driven Oil Pump.Bearings Replaced
type: Subject
label: 05000315/LER-1987-021, :on 871013,ESF Actuation Occurred Due to Feedwater Flow/Steam Mismatch Coincident W/Low Level on Steam Generator 11.Caused by Failure of East Main Feedwater Pump Shaft Driven Oil Pump.Bearings Replaced
page: https://kanterella.com/05000315/LER-2D1987-2D021-2C_-3Aon_871013-2CESF_Actuation_Occurred_Due_to_Feedwater_Flow/Steam_Mismatch_Coincident_W/Low_Level_on_Steam_Generator_11.Caused_by_Failure_of_East_Ma…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1987-021, :on 871013,ESF Actuation Occurred Due to Feedwater Flow/Steam Mismatch Coincident W/Low Level on Steam Generator 11.Caused by Failure of East Main Feedwater Pump Shaft Driven Oil Pump.Bearings Replaced

LER-1987-009, :on 870825,gland Seal Leakoff Condenser Effluent Radiation Monitor Found Inoperable.Caused by Failure to Perform Adequate Review of Monitor Status During Shift Surveillance.Procedures Revised
type: Subject
label: 05000316/LER-1987-009, :on 870825,gland Seal Leakoff Condenser Effluent Radiation Monitor Found Inoperable.Caused by Failure to Perform Adequate Review of Monitor Status During Shift Surveillance.Procedures Revised
page: https://kanterella.com/05000316/LER-2D1987-2D009-2C_-3Aon_870825-2Cgland_Seal_Leakoff_Condenser_Effluent_Radiation_Monitor_Found_Inoperable.Caused_by_Failure_to_Perform_Adequate_Review_of_Monitor_Stat…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000316/LER-1987-009, :on 870825,gland Seal Leakoff Condenser Effluent Radiation Monitor Found Inoperable.Caused by Failure to Perform Adequate Review of Monitor Status During Shift Surveillance.Procedures Revised

Steam Flow Mismatch on Steam Generator 24.Cause Unknown.Procedures Implemented
type: Subject
label: 05000316/LER-1989-006, :on 890224,ESF Actuation Occurred from Instrumentation Indicating Low Level Coincident W/Feedwater Flow/Steam Flow Mismatch on Steam Generator 24.Cause Unknown.Procedures Implemented
page: https://kanterella.com/05000316/LER-2D1989-2D006-2C_-3Aon_890224-2CESF_Actuation_Occurred_from_Instrumentation_Indicating_Low_Level_Coincident_W/Feedwater_Flow/Steam_Flow_Mismatch_on_Steam_Generator_2…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000316/LER-1989-006, :on 890224,ESF Actuation Occurred from Instrumentation Indicating Low Level Coincident W/Feedwater Flow/Steam Flow Mismatch on Steam Generator 24.Cause Unknown.Procedures Implemented

8 Inch in 46 Flow Passages & 6 of 24 Ice Condenser Bays.Caused by Abnormal Degradation.Ice Condenser Defrosted
type: Subject
label: 05000316/LER-1987-010-01, :on 870902,insps Revealed Frost & Ice Buildup on Lattice Frames of Greater That 3/8 Inch in 46 Flow Passages & 6 of 24 Ice Condenser Bays.Caused by Abnormal Degradation.Ice Condenser Defrosted
page: https://kanterella.com/05000316/LER-2D1987-2D010-2D01-2C_-3Aon_870902-2Cinsps_Revealed_Frost_-26_Ice_Buildup_on_Lattice_Frames_of_Greater_That_3/8_Inch_in_46_Flow_Passages_-26_6_of_24_Ice_Condenser_Ba…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000316/LER-1987-010-01, :on 870902,insps Revealed Frost & Ice Buildup on Lattice Frames of Greater That 3/8 Inch in 46 Flow Passages & 6 of 24 Ice Condenser Bays.Caused by Abnormal Degradation.Ice Condenser Defrosted

Tech Spec Requirements for Testing of Turbine & Motor Driven Auxiliary Feed Pumps & Emergency Diesel Generators Occurred.Caused by Procedural Deficiencies.Procedure Revised
type: Subject
label: 05000315/LER-1987-014, :on 870812,failure to Comply W/Tech Spec Requirements for Testing of Turbine & Motor Driven Auxiliary Feed Pumps & Emergency Diesel Generators Occurred.Caused by Procedural Deficiencies.Procedure Revised
page: https://kanterella.com/05000315/LER-2D1987-2D014-2C_-3Aon_870812-2Cfailure_to_Comply_W/Tech_Spec_Requirements_for_Testing_of_Turbine_-26_Motor_Driven_Auxiliary_Feed_Pumps_-26_Emergency_Diesel_Generato…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1987-014, :on 870812,failure to Comply W/Tech Spec Requirements for Testing of Turbine & Motor Driven Auxiliary Feed Pumps & Emergency Diesel Generators Occurred.Caused by Procedural Deficiencies.Procedure Revised

LER-1987-005-01, :on 870602,ESF Actuation Occurred Due to Low Low Steam Generator Level in Steam Generator 23.Caused by Personnel Error.Appropriate Administrative Action Taken Re Personnel.Procedures Implemented
type: Subject
label: 05000316/LER-1987-005-01, :on 870602,ESF Actuation Occurred Due to Low Low Steam Generator Level in Steam Generator 23.Caused by Personnel Error.Appropriate Administrative Action Taken Re Personnel.Procedures Implemented
page: https://kanterella.com/05000316/LER-2D1987-2D005-2D01-2C_-3Aon_870602-2CESF_Actuation_Occurred_Due_to_Low_Low_Steam_Generator_Level_in_Steam_Generator_23.Caused_by_Personnel_Error.Appropriate_Administ…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000316/LER-1987-005-01, :on 870602,ESF Actuation Occurred Due to Low Low Steam Generator Level in Steam Generator 23.Caused by Personnel Error.Appropriate Administrative Action Taken Re Personnel.Procedures Implemented

LER-1987-006-01, :on 870615,containment Spray Pumps Declared Inoperable Due to Improperly Performed Tech Spec Surveillances Testing.Caused by Improper Labeling of Flow Instrumentation Being Maintained.Pumps Tested
type: Subject
label: 05000316/LER-1987-006-01, :on 870615,containment Spray Pumps Declared Inoperable Due to Improperly Performed Tech Spec Surveillances Testing.Caused by Improper Labeling of Flow Instrumentation Being Maintained.Pumps Tested
page: https://kanterella.com/05000316/LER-2D1987-2D006-2D01-2C_-3Aon_870615-2Ccontainment_Spray_Pumps_Declared_Inoperable_Due_to_Improperly_Performed_Tech_Spec_Surveillances_Testing.Caused_by_Improper_Label…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000316/LER-1987-006-01, :on 870615,containment Spray Pumps Declared Inoperable Due to Improperly Performed Tech Spec Surveillances Testing.Caused by Improper Labeling of Flow Instrumentation Being Maintained.Pumps Tested

LER-1987-008, :on 870604,ESF Actuation Occurred Due to Extreme High Level in Steam Generator 12.Caused by Mispositioning of Both Level Controller & Feedwater Flow Selector Switch.Level Controller Refurbished
type: Subject
label: 05000315/LER-1987-008, :on 870604,ESF Actuation Occurred Due to Extreme High Level in Steam Generator 12.Caused by Mispositioning of Both Level Controller & Feedwater Flow Selector Switch.Level Controller Refurbished
page: https://kanterella.com/05000315/LER-2D1987-2D008-2C_-3Aon_870604-2CESF_Actuation_Occurred_Due_to_Extreme_High_Level_in_Steam_Generator_12.Caused_by_Mispositioning_of_Both_Level_Controller_-26_Feedwate…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000315/LER-1987-008, :on 870604,ESF Actuation Occurred Due to Extreme High Level in Steam Generator 12.Caused by Mispositioning of Both Level Controller & Feedwater Flow Selector Switch.Level Controller Refurbished

05000316/LER-1987-003, :on 870107,overpower Delta Temp Bistables Failed to Trip During Instrumentation Calibr.Caused by Procedural Deficiency & Personnel Error.Procedure Revised
type: Subject
page: https://kanterella.com/05000316/LER-2D1987-2D003-2C_-3Aon_870107-2Coverpower_Delta_Temp_Bistables_Failed_to_Trip_During_Instrumentation_Calibr.Caused_by_Procedural_Deficiency_-26_Personnel_Error.Proce…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000316/LER-1987-003, :on 870107,overpower Delta Temp Bistables Failed to Trip During Instrumentation Calibr.Caused by Procedural Deficiency & Personnel Error.Procedure Revised

LER-1987-002, :on 870305-06,frost & Ice Buildup on Lattice Frames & Between Walls & Ice Baskets Adjacent to Walls Exceeded Tech Spec 4.6.5.1.b.3 Limits.Cause to Be Investigated by Westinghouse.Internal Investigation Begun
type: Subject
label: 05000316/LER-1987-002, :on 870305-06,frost & Ice Buildup on Lattice Frames & Between Walls & Ice Baskets Adjacent to Walls Exceeded Tech Spec 4.6.5.1.b.3 Limits.Cause to Be Investigated by Westinghouse.Internal Investigation Begun
page: https://kanterella.com/05000316/LER-2D1987-2D002-2C_-3Aon_870305-2D06-2Cfrost_-26_Ice_Buildup_on_Lattice_Frames_-26_Between_Walls_-26_Ice_Baskets_Adjacent_to_Walls_Exceeded_Tech_Spec_4.6.5.1.b.3_Limit…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000316/LER-1987-002, :on 870305-06,frost & Ice Buildup on Lattice Frames & Between Walls & Ice Baskets Adjacent to Walls Exceeded Tech Spec 4.6.5.1.b.3 Limits.Cause to Be Investigated by Westinghouse.Internal Investigation Begun

O Prior Initiation of Temporary Change Due to Out of Svc Valve
type: Subject
label: 05000335/LER-1989-001-03, :on 890517,inadvertent Liquid Release from Waste Mgt Sys Occurred.Caused by Personnel Deviation from Procedure OP 1-0510022 W/O Prior Initiation of Temporary Change Due to Out of Svc Valve
page: https://kanterella.com/05000335/LER-2D1989-2D001-2D03-2C_-3Aon_890517-2Cinadvertent_Liquid_Release_from_Waste_Mgt_Sys_Occurred.Caused_by_Personnel_Deviation_from_Procedure_OP_1-2D0510022_W/O_Prior_Ini…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000335/LER-1989-001-03, :on 890517,inadvertent Liquid Release from Waste Mgt Sys Occurred.Caused by Personnel Deviation from Procedure OP 1-0510022 W/O Prior Initiation of Temporary Change Due to Out of Svc Valve

LER-1988-015, :on 881203,chemistry Technician Discovered That New Fuel Area Radiation Monitor RU-19 Inoperable.Caused by Malfunction of Clock in Computer Internal to Monitor. Monitor Reset & Operated Properly
type: Subject
label: 05000529/LER-1988-015, :on 881203,chemistry Technician Discovered That New Fuel Area Radiation Monitor RU-19 Inoperable.Caused by Malfunction of Clock in Computer Internal to Monitor. Monitor Reset & Operated Properly
page: https://kanterella.com/05000529/LER-2D1988-2D015-2C_-3Aon_881203-2Cchemistry_Technician_Discovered_That_New_Fuel_Area_Radiation_Monitor_RU-2D19_Inoperable.Caused_by_Malfunction_of_Clock_in_Computer_In…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000529/LER-1988-015, :on 881203,chemistry Technician Discovered That New Fuel Area Radiation Monitor RU-19 Inoperable.Caused by Malfunction of Clock in Computer Internal to Monitor. Monitor Reset & Operated Properly

05000530/LER-1991-011-01, :on 911104,auxiliary Feedwater Flow Transmitters Equalizing Valve Found Improperly Aligned. Cause Not Determined.Valves Aligned Properly
type: Subject
page: https://kanterella.com/05000530/LER-2D1991-2D011-2D01-2C_-3Aon_911104-2Cauxiliary_Feedwater_Flow_Transmitters_Equalizing_Valve_Found_Improperly_Aligned._Cause_Not_Determined.Valves_Aligned_Properly
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000530/LER-1991-011-01, :on 911104,auxiliary Feedwater Flow Transmitters Equalizing Valve Found Improperly Aligned. Cause Not Determined.Valves Aligned Properly

LER-1989-007, :on 890412,discovered Two of Four Pressurizer Code Safety Valves Out of Tech Spec Tolerance of 2,500 Psia Plus or Minus 1-.Caused by Performance Limitation.Valves Adjusted & Retested Satisfactorily
type: Subject
label: 05000528/LER-1989-007, :on 890412,discovered Two of Four Pressurizer Code Safety Valves Out of Tech Spec Tolerance of 2,500 Psia Plus or Minus 1%.Caused by Performance Limitation.Valves Adjusted & Retested Satisfactorily
page: https://kanterella.com/05000528/LER-2D1989-2D007-2C_-3Aon_890412-2Cdiscovered_Two_of_Four_Pressurizer_Code_Safety_Valves_Out_of_Tech_Spec_Tolerance_of_2-2C500_Psia_Plus_or_Minus_1-.Caused_by_Performan…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000528/LER-1989-007, :on 890412,discovered Two of Four Pressurizer Code Safety Valves Out of Tech Spec Tolerance of 2,500 Psia Plus or Minus 1%.Caused by Performance Limitation.Valves Adjusted & Retested Satisfactorily

LER-1989-005-02, :on 890310,loss of Power to Alternate Plant Ventilation Effluent Radiation Monitor Occurred.Caused by Electrical Loads in Excess of Circuit Capacity.Design Mod Issued to Supply Dedicated Power to Loads
type: Subject
label: 05000529/LER-1989-005-02, :on 890310,loss of Power to Alternate Plant Ventilation Effluent Radiation Monitor Occurred.Caused by Electrical Loads in Excess of Circuit Capacity.Design Mod Issued to Supply Dedicated Power to Loads
page: https://kanterella.com/05000529/LER-2D1989-2D005-2D02-2C_-3Aon_890310-2Closs_of_Power_to_Alternate_Plant_Ventilation_Effluent_Radiation_Monitor_Occurred.Caused_by_Electrical_Loads_in_Excess_of_Circuit…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000529/LER-1989-005-02, :on 890310,loss of Power to Alternate Plant Ventilation Effluent Radiation Monitor Occurred.Caused by Electrical Loads in Excess of Circuit Capacity.Design Mod Issued to Supply Dedicated Power to Loads

LER-1990-003, :on 900320,log Power Channels Declared Inoperable When Plant Protection Cabinets Deenergized for Scheduled Maint.Caused by Personnel Error.Wiring in Cabinets Reworked & Cabinets Returned to Svc
type: Subject
label: 05000528/LER-1990-003, :on 900320,log Power Channels Declared Inoperable When Plant Protection Cabinets Deenergized for Scheduled Maint.Caused by Personnel Error.Wiring in Cabinets Reworked & Cabinets Returned to Svc
page: https://kanterella.com/05000528/LER-2D1990-2D003-2C_-3Aon_900320-2Clog_Power_Channels_Declared_Inoperable_When_Plant_Protection_Cabinets_Deenergized_for_Scheduled_Maint.Caused_by_Personnel_Error.Wirin…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000528/LER-1990-003, :on 900320,log Power Channels Declared Inoperable When Plant Protection Cabinets Deenergized for Scheduled Maint.Caused by Personnel Error.Wiring in Cabinets Reworked & Cabinets Returned to Svc

05000528/LER-1988-016, :on 880514,reactor Trip Occurred.Caused by Nonconservative Operator Performance During Reactor Startup. Info Utilized for Estimated Critical Condition Will Be Corrected
type: Subject
page: https://kanterella.com/05000528/LER-2D1988-2D016-2C_-3Aon_880514-2Creactor_Trip_Occurred.Caused_by_Nonconservative_Operator_Performance_During_Reactor_Startup._Info_Utilized_for_Estimated_Critical_Con…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000528/LER-1988-016, :on 880514,reactor Trip Occurred.Caused by Nonconservative Operator Performance During Reactor Startup. Info Utilized for Estimated Critical Condition Will Be Corrected

LER-1988-004-02, :on 880406,loss of Power Event Occurred Which Resulted in Train B ESF Load Sequencer Sys Actuation.Caused by Error in Work Document Being Utilized to Replace Current Transformer.Maint Testing Stopped
type: Subject
label: 05000530/LER-1988-004-02, :on 880406,loss of Power Event Occurred Which Resulted in Train B ESF Load Sequencer Sys Actuation.Caused by Error in Work Document Being Utilized to Replace Current Transformer.Maint Testing Stopped
page: https://kanterella.com/05000530/LER-2D1988-2D004-2D02-2C_-3Aon_880406-2Closs_of_Power_Event_Occurred_Which_Resulted_in_Train_B_ESF_Load_Sequencer_Sys_Actuation.Caused_by_Error_in_Work_Document_Being_U…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000530/LER-1988-004-02, :on 880406,loss of Power Event Occurred Which Resulted in Train B ESF Load Sequencer Sys Actuation.Caused by Error in Work Document Being Utilized to Replace Current Transformer.Maint Testing Stopped

LER-1989-005, :on 890412,determined That Deficiencies Identified by Control Components,Inc of Atmospheric Dump Valves Constituted Reportable Part 21 Condition.Caused by Improperly Seated Piston Ring.Valve Replaced
type: Subject
label: 05000528/LER-1989-005, :on 890412,determined That Deficiencies Identified by Control Components,Inc of Atmospheric Dump Valves Constituted Reportable Part 21 Condition.Caused by Improperly Seated Piston Ring.Valve Replaced
page: https://kanterella.com/05000528/LER-2D1989-2D005-2C_-3Aon_890412-2Cdetermined_That_Deficiencies_Identified_by_Control_Components-2CInc_of_Atmospheric_Dump_Valves_Constituted_Reportable_Part_21_Conditi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000528/LER-1989-005, :on 890412,determined That Deficiencies Identified by Control Components,Inc of Atmospheric Dump Valves Constituted Reportable Part 21 Condition.Caused by Improperly Seated Piston Ring.Valve Replaced

LER-1986-063-01, :on 860920,discovered That Error in Radioactive Source Tracking Sys Resulted in Radioactive Sealed Source Not Being Leak Tested Once Per 6 Months.Caused by Personnel Error.Entries Verified
type: Subject
label: 05000528/LER-1986-063-01, :on 860920,discovered That Error in Radioactive Source Tracking Sys Resulted in Radioactive Sealed Source Not Being Leak Tested Once Per 6 Months.Caused by Personnel Error.Entries Verified
page: https://kanterella.com/05000528/LER-2D1986-2D063-2D01-2C_-3Aon_860920-2Cdiscovered_That_Error_in_Radioactive_Source_Tracking_Sys_Resulted_in_Radioactive_Sealed_Source_Not_Being_Leak_Tested_Once_Per_6_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000528/LER-1986-063-01, :on 860920,discovered That Error in Radioactive Source Tracking Sys Resulted in Radioactive Sealed Source Not Being Leak Tested Once Per 6 Months.Caused by Personnel Error.Entries Verified

05000528/LER-1991-006, :on 910517,ESF Actuation Occurred Due to Radiation Monitor Failure.Caused by Malfunctioning Central Processing Unit & Random Access Memory Board on Train B. Boards Replaced
type: Subject
page: https://kanterella.com/05000528/LER-2D1991-2D006-2C_-3Aon_910517-2CESF_Actuation_Occurred_Due_to_Radiation_Monitor_Failure.Caused_by_Malfunctioning_Central_Processing_Unit_-26_Random_Access_Memory_Boa…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000528/LER-1991-006, :on 910517,ESF Actuation Occurred Due to Radiation Monitor Failure.Caused by Malfunctioning Central Processing Unit & Random Access Memory Board on Train B. Boards Replaced

LER-1988-008-02, :on 890220,determined That Excessive Moisture Condensation Occasionally Discovered in Unit Resulted in Invalid Sample Results.Caused by Cooling of High Humidity Sample Stream.Temporary Heat Trace Installed
type: Subject
label: 05000530/LER-1988-008-02, :on 890220,determined That Excessive Moisture Condensation Occasionally Discovered in Unit Resulted in Invalid Sample Results.Caused by Cooling of High Humidity Sample Stream.Temporary Heat Trace Installed
page: https://kanterella.com/05000530/LER-2D1988-2D008-2D02-2C_-3Aon_890220-2Cdetermined_That_Excessive_Moisture_Condensation_Occasionally_Discovered_in_Unit_Resulted_in_Invalid_Sample_Results.Caused_by_Coo…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000530/LER-1988-008-02, :on 890220,determined That Excessive Moisture Condensation Occasionally Discovered in Unit Resulted in Invalid Sample Results.Caused by Cooling of High Humidity Sample Stream.Temporary Heat Trace Installed

LER-1987-003-02, :on 870929,condition Identified That,If Not Corrected,Could Have Resulted in Improper Operation of Two Shutdown Cooling Isolation Valves in Redundant Trains.Caused by Vendor Error.Bolting Replaced
type: Subject
label: 05000530/LER-1987-003-02, :on 870929,condition Identified That,If Not Corrected,Could Have Resulted in Improper Operation of Two Shutdown Cooling Isolation Valves in Redundant Trains.Caused by Vendor Error.Bolting Replaced
page: https://kanterella.com/05000530/LER-2D1987-2D003-2D02-2C_-3Aon_870929-2Ccondition_Identified_That-2CIf_Not_Corrected-2CCould_Have_Resulted_in_Improper_Operation_of_Two_Shutdown_Cooling_Isolation_Valve…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000530/LER-1987-003-02, :on 870929,condition Identified That,If Not Corrected,Could Have Resulted in Improper Operation of Two Shutdown Cooling Isolation Valves in Redundant Trains.Caused by Vendor Error.Bolting Replaced

LER-1988-005, :on 880123,backhoe Operator Inadvertently Damaged Post Indication Valve (Piv)(Kp)(Isv) & Caused Fire Suppression Water to Discharge Into Protected Area.Caused by Inadequate Procedure.Procedures Implemented
type: Subject
label: 05000528/LER-1988-005, :on 880123,backhoe Operator Inadvertently Damaged Post Indication Valve (Piv)(Kp)(Isv) & Caused Fire Suppression Water to Discharge Into Protected Area.Caused by Inadequate Procedure.Procedures Implemented
page: https://kanterella.com/05000528/LER-2D1988-2D005-2C_-3Aon_880123-2Cbackhoe_Operator_Inadvertently_Damaged_Post_Indication_Valve_-28Piv-29-28Kp-29-28Isv-29_-26_Caused_Fire_Suppression_Water_to_Discharg…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000528/LER-1988-005, :on 880123,backhoe Operator Inadvertently Damaged Post Indication Valve (Piv)(Kp)(Isv) & Caused Fire Suppression Water to Discharge Into Protected Area.Caused by Inadequate Procedure.Procedures Implemented

LER-1987-024, :on 870902,two Dma Interface Cards Providing Input to Core Operating Limit Supervisory Sys Found Incorrectly Installed.Caused by Cognitive Personnel Error. Computer Technician Counseled
type: Subject
label: 05000528/LER-1987-024, :on 870902,two Dma Interface Cards Providing Input to Core Operating Limit Supervisory Sys Found Incorrectly Installed.Caused by Cognitive Personnel Error. Computer Technician Counseled
page: https://kanterella.com/05000528/LER-2D1987-2D024-2C_-3Aon_870902-2Ctwo_Dma_Interface_Cards_Providing_Input_to_Core_Operating_Limit_Supervisory_Sys_Found_Incorrectly_Installed.Caused_by_Cognitive_Perso…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000528/LER-1987-024, :on 870902,two Dma Interface Cards Providing Input to Core Operating Limit Supervisory Sys Found Incorrectly Installed.Caused by Cognitive Personnel Error. Computer Technician Counseled

LER-1989-005-01, :on 890628,sample Flow Rate for Vent low-range Radioactive Effluent Monitor Below Low Flow Alarm Setpoint, Rendering Monitor Inoperable.Caused by Loose Set Screw on Coupling.Set Screw on Sample Pump Tightened
type: Subject
label: 05000530/LER-1989-005-01, :on 890628,sample Flow Rate for Vent low-range Radioactive Effluent Monitor Below Low Flow Alarm Setpoint, Rendering Monitor Inoperable.Caused by Loose Set Screw on Coupling.Set Screw on Sample Pump Tightened
page: https://kanterella.com/05000530/LER-2D1989-2D005-2D01-2C_-3Aon_890628-2Csample_Flow_Rate_for_Vent_low-2Drange_Radioactive_Effluent_Monitor_Below_Low_Flow_Alarm_Setpoint-2C_Rendering_Monitor_Inoperable…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000530/LER-1989-005-01, :on 890628,sample Flow Rate for Vent low-range Radioactive Effluent Monitor Below Low Flow Alarm Setpoint, Rendering Monitor Inoperable.Caused by Loose Set Screw on Coupling.Set Screw on Sample Pump Tightened

05000530/LER-1990-004, :on 900414,reactor Trip Occurred.Caused by Control Element Assembly Dropping Into Core Due to Optical Isolator Card Malfunction.Card Replaced & Retested
type: Subject
page: https://kanterella.com/05000530/LER-2D1990-2D004-2C_-3Aon_900414-2Creactor_Trip_Occurred.Caused_by_Control_Element_Assembly_Dropping_Into_Core_Due_to_Optical_Isolator_Card_Malfunction.Card_Replaced_-2…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000530/LER-1990-004, :on 900414,reactor Trip Occurred.Caused by Control Element Assembly Dropping Into Core Due to Optical Isolator Card Malfunction.Card Replaced & Retested

4.6.3 Action Statements Could Not Be Met.Caused by Inoperability of Msivs.Tech Spec Change Request Submitted
type: Subject
label: 05000529/LER-1987-006-01, :on 870307,during Surveillance Test,Limiting Condition for Operation 3.0.3 Entered When Tech Spec 3/4.6.3 Action Statements Could Not Be Met.Caused by Inoperability of Msivs.Tech Spec Change Request Submitted
page: https://kanterella.com/05000529/LER-2D1987-2D006-2D01-2C_-3Aon_870307-2Cduring_Surveillance_Test-2CLimiting_Condition_for_Operation_3.0.3_Entered_When_Tech_Spec_3/4.6.3_Action_Statements_Could_Not_Be_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000529/LER-1987-006-01, :on 870307,during Surveillance Test,Limiting Condition for Operation 3.0.3 Entered When Tech Spec 3/4.6.3 Action Statements Could Not Be Met.Caused by Inoperability of Msivs.Tech Spec Change Request Submitted

LER-1987-016-01, :on 870718,contents of Chemical Waste Neutralization Tank Released to Onsite Evaporation Pond Exceeding Tech Spec 3.11.1.1 Limit for Mo-99.Caused by Personnel Error.Briefing Session Planned
type: Subject
label: 05000529/LER-1987-016-01, :on 870718,contents of Chemical Waste Neutralization Tank Released to Onsite Evaporation Pond Exceeding Tech Spec 3.11.1.1 Limit for Mo-99.Caused by Personnel Error.Briefing Session Planned
page: https://kanterella.com/05000529/LER-2D1987-2D016-2D01-2C_-3Aon_870718-2Ccontents_of_Chemical_Waste_Neutralization_Tank_Released_to_Onsite_Evaporation_Pond_Exceeding_Tech_Spec_3.11.1.1_Limit_for_Mo-2D9…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000529/LER-1987-016-01, :on 870718,contents of Chemical Waste Neutralization Tank Released to Onsite Evaporation Pond Exceeding Tech Spec 3.11.1.1 Limit for Mo-99.Caused by Personnel Error.Briefing Session Planned

Negative Results & Night Order Issued
type: Subject
label: 05000529/LER-1988-015-01, :on 881203,new Fuel Area Radiation Monitor RU-19 Discovered Inoperable.Caused by Malfunction in Clock in Computer Internals to Monitor.Area Survey Conducted W/Negative Results & Night Order Issued
page: https://kanterella.com/05000529/LER-2D1988-2D015-2D01-2C_-3Aon_881203-2Cnew_Fuel_Area_Radiation_Monitor_RU-2D19_Discovered_Inoperable.Caused_by_Malfunction_in_Clock_in_Computer_Internals_to_Monitor.Ar…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000529/LER-1988-015-01, :on 881203,new Fuel Area Radiation Monitor RU-19 Discovered Inoperable.Caused by Malfunction in Clock in Computer Internals to Monitor.Area Survey Conducted W/Negative Results & Night Order Issued

LER-1990-005, :on 900209,nonsafety-related Circuit Breaker on Power Panel Tripped,Resulting in ESF Actuation.Caused by Equipment Mfg Error Involving Defect in Circuit Breaker Tripping Mechanism.Defective Breaker Replaced
type: Subject
label: 05000397/LER-1990-005, :on 900209,nonsafety-related Circuit Breaker on Power Panel Tripped,Resulting in ESF Actuation.Caused by Equipment Mfg Error Involving Defect in Circuit Breaker Tripping Mechanism.Defective Breaker Replaced
page: https://kanterella.com/05000397/LER-2D1990-2D005-2C_-3Aon_900209-2Cnonsafety-2Drelated_Circuit_Breaker_on_Power_Panel_Tripped-2CResulting_in_ESF_Actuation.Caused_by_Equipment_Mfg_Error_Involving_Defec…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000397/LER-1990-005, :on 900209,nonsafety-related Circuit Breaker on Power Panel Tripped,Resulting in ESF Actuation.Caused by Equipment Mfg Error Involving Defect in Circuit Breaker Tripping Mechanism.Defective Breaker Replaced

05000397/LER-1990-018, :on 900904,ESF Actuation of Containment Instrument Air Sys Occurred as Result of Inadvertent Manual Relief Valve Blowdown.Manual Actuator Removed & Lighting Fixture Secured
type: Subject
page: https://kanterella.com/05000397/LER-2D1990-2D018-2C_-3Aon_900904-2CESF_Actuation_of_Containment_Instrument_Air_Sys_Occurred_as_Result_of_Inadvertent_Manual_Relief_Valve_Blowdown.Manual_Actuator_Remove…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000397/LER-1990-018, :on 900904,ESF Actuation of Containment Instrument Air Sys Occurred as Result of Inadvertent Manual Relief Valve Blowdown.Manual Actuator Removed & Lighting Fixture Secured

LER-1990-014, :on 900703,HPCS Sys Pump Suction Switchover from Condensate Storage Tanks to Suppression Pool Occurred Due to Suppression Pool High Water Level Condition.Caused by Procedural Inadequacy.Procedures Modified
type: Subject
label: 05000397/LER-1990-014, :on 900703,HPCS Sys Pump Suction Switchover from Condensate Storage Tanks to Suppression Pool Occurred Due to Suppression Pool High Water Level Condition.Caused by Procedural Inadequacy.Procedures Modified
page: https://kanterella.com/05000397/LER-2D1990-2D014-2C_-3Aon_900703-2CHPCS_Sys_Pump_Suction_Switchover_from_Condensate_Storage_Tanks_to_Suppression_Pool_Occurred_Due_to_Suppression_Pool_High_Water_Level_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000397/LER-1990-014, :on 900703,HPCS Sys Pump Suction Switchover from Condensate Storage Tanks to Suppression Pool Occurred Due to Suppression Pool High Water Level Condition.Caused by Procedural Inadequacy.Procedures Modified

LER-1989-007, :on 890316,discovered That Two Tech Spec Surveillance Procedures Re Fire Protection Zones for Standby Svc Water Pump Houses & Power Generation Control Cabinet Inconsistent.Action Statements Implemented
type: Subject
label: 05000397/LER-1989-007, :on 890316,discovered That Two Tech Spec Surveillance Procedures Re Fire Protection Zones for Standby Svc Water Pump Houses & Power Generation Control Cabinet Inconsistent.Action Statements Implemented
page: https://kanterella.com/05000397/LER-2D1989-2D007-2C_-3Aon_890316-2Cdiscovered_That_Two_Tech_Spec_Surveillance_Procedures_Re_Fire_Protection_Zones_for_Standby_Svc_Water_Pump_Houses_-26_Power_Generation…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000397/LER-1989-007, :on 890316,discovered That Two Tech Spec Surveillance Procedures Re Fire Protection Zones for Standby Svc Water Pump Houses & Power Generation Control Cabinet Inconsistent.Action Statements Implemented

LER-1989-019, :on 890524,inboard RHR Shutdown Cooling Supply Valve Automatically Isolated When Electrician Lifted Wire Deenergizing Valve Control Relay.Personnel Counseled & Training in Plant Procedures Initiated
type: Subject
label: 05000397/LER-1989-019, :on 890524,inboard RHR Shutdown Cooling Supply Valve Automatically Isolated When Electrician Lifted Wire Deenergizing Valve Control Relay.Personnel Counseled & Training in Plant Procedures Initiated
page: https://kanterella.com/05000397/LER-2D1989-2D019-2C_-3Aon_890524-2Cinboard_RHR_Shutdown_Cooling_Supply_Valve_Automatically_Isolated_When_Electrician_Lifted_Wire_Deenergizing_Valve_Control_Relay.Person…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000397/LER-1989-019, :on 890524,inboard RHR Shutdown Cooling Supply Valve Automatically Isolated When Electrician Lifted Wire Deenergizing Valve Control Relay.Personnel Counseled & Training in Plant Procedures Initiated

Ler Not Issued within 30 Days After Determination
type: Subject
label: 05000397/LER-1989-008, :on 890419,discovered That on 881202,Tech Spec Amend Request Submitted to NRC Describing Diesel Generator Trip Bypass Verification That Had Not Been Performed W/Ler Not Issued within 30 Days After Determination
page: https://kanterella.com/05000397/LER-2D1989-2D008-2C_-3Aon_890419-2Cdiscovered_That_on_881202-2CTech_Spec_Amend_Request_Submitted_to_NRC_Describing_Diesel_Generator_Trip_Bypass_Verification_That_Had_No…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000397/LER-1989-008, :on 890419,discovered That on 881202,Tech Spec Amend Request Submitted to NRC Describing Diesel Generator Trip Bypass Verification That Had Not Been Performed W/Ler Not Issued within 30 Days After Determination

LER-1989-003, :on 890209,control Room Emergency Filtration Sys Adsorber Charcoal Sample Not Taken After 720 H of Operation.Caused by Misinterpretation of Tech Specs.Charcoal Sample Analyzed & Procedure Revised
type: Subject
label: 05000397/LER-1989-003, :on 890209,control Room Emergency Filtration Sys Adsorber Charcoal Sample Not Taken After 720 H of Operation.Caused by Misinterpretation of Tech Specs.Charcoal Sample Analyzed & Procedure Revised
page: https://kanterella.com/05000397/LER-2D1989-2D003-2C_-3Aon_890209-2Ccontrol_Room_Emergency_Filtration_Sys_Adsorber_Charcoal_Sample_Not_Taken_After_720_H_of_Operation.Caused_by_Misinterpretation_of_Tech…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000397/LER-1989-003, :on 890209,control Room Emergency Filtration Sys Adsorber Charcoal Sample Not Taken After 720 H of Operation.Caused by Misinterpretation of Tech Specs.Charcoal Sample Analyzed & Procedure Revised

LER-1989-005-01, :on 890311,of 185 Control rods,34 Drifted Inward from One to Seven Notches Due to Momentary Low Scram Air Header Pressure.Caused by Main Steam Radiation Monitor Design Deficiency
type: Subject
label: 05000397/LER-1989-005-01, :on 890311,of 185 Control rods,34 Drifted Inward from One to Seven Notches Due to Momentary Low Scram Air Header Pressure.Caused by Main Steam Radiation Monitor Design Deficiency
page: https://kanterella.com/05000397/LER-2D1989-2D005-2D01-2C_-3Aon_890311-2Cof_185_Control_rods-2C34_Drifted_Inward_from_One_to_Seven_Notches_Due_to_Momentary_Low_Scram_Air_Header_Pressure.Caused_by_Main_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000397/LER-1989-005-01, :on 890311,of 185 Control rods,34 Drifted Inward from One to Seven Notches Due to Momentary Low Scram Air Header Pressure.Caused by Main Steam Radiation Monitor Design Deficiency

LER-1989-022, :on 890530,loss of Secondary Containment During Core Alterations Due to Unisolatable Lines Occurred.Caused by Simultaneous Activities.Rhr Heat Exchanger Isolation Valves Closed to Reestablish Integrity
type: Subject
label: 05000397/LER-1989-022, :on 890530,loss of Secondary Containment During Core Alterations Due to Unisolatable Lines Occurred.Caused by Simultaneous Activities.Rhr Heat Exchanger Isolation Valves Closed to Reestablish Integrity
page: https://kanterella.com/05000397/LER-2D1989-2D022-2C_-3Aon_890530-2Closs_of_Secondary_Containment_During_Core_Alterations_Due_to_Unisolatable_Lines_Occurred.Caused_by_Simultaneous_Activities.Rhr_Heat_E…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000397/LER-1989-022, :on 890530,loss of Secondary Containment During Core Alterations Due to Unisolatable Lines Occurred.Caused by Simultaneous Activities.Rhr Heat Exchanger Isolation Valves Closed to Reestablish Integrity

LER-1988-014, :on 880512,RWCU Sys Resin Tank Spill Occurred. Caused by Open RWCU Sample Line Isolation Valves RWCU-V-442 & 443.RWCU-V-442 & 443 Tagged Shut & de-energized & Radwaste Control Room Operator Involved Counseled
type: Subject
label: 05000397/LER-1988-014, :on 880512,RWCU Sys Resin Tank Spill Occurred. Caused by Open RWCU Sample Line Isolation Valves RWCU-V-442 & 443.RWCU-V-442 & 443 Tagged Shut & de-energized & Radwaste Control Room Operator Involved Counseled
page: https://kanterella.com/05000397/LER-2D1988-2D014-2C_-3Aon_880512-2CRWCU_Sys_Resin_Tank_Spill_Occurred._Caused_by_Open_RWCU_Sample_Line_Isolation_Valves_RWCU-2DV-2D442_-26_443.RWCU-2DV-2D442_-26_443_Ta…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000397/LER-1988-014, :on 880512,RWCU Sys Resin Tank Spill Occurred. Caused by Open RWCU Sample Line Isolation Valves RWCU-V-442 & 443.RWCU-V-442 & 443 Tagged Shut & de-energized & Radwaste Control Room Operator Involved Counseled

LER-1988-006, :on 880208,emergency Svc Water Sys Declared Inoperable.Caused by Isolation Valve Failures.Valves Repaired & Retested.On 880212,after Concern Raised,Manual Valve Closed,Pending Permanent Design Change
type: Subject
label: 05000400/LER-1988-006, :on 880208,emergency Svc Water Sys Declared Inoperable.Caused by Isolation Valve Failures.Valves Repaired & Retested.On 880212,after Concern Raised,Manual Valve Closed,Pending Permanent Design Change
page: https://kanterella.com/05000400/LER-2D1988-2D006-2C_-3Aon_880208-2Cemergency_Svc_Water_Sys_Declared_Inoperable.Caused_by_Isolation_Valve_Failures.Valves_Repaired_-26_Retested.On_880212-2Cafter_Concern…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000400/LER-1988-006, :on 880208,emergency Svc Water Sys Declared Inoperable.Caused by Isolation Valve Failures.Valves Repaired & Retested.On 880212,after Concern Raised,Manual Valve Closed,Pending Permanent Design Change

LER-1988-002, :on 880122,discovered RCIC Pump Suction Line Failed to Meet Containment Isolation & Single Failure Design Criteria.Caused by Ae Design Error.Check Valve Installed & Ltr Re Error Sent to B&R.Part 21 Related
type: Subject
label: 05000397/LER-1988-002, :on 880122,discovered RCIC Pump Suction Line Failed to Meet Containment Isolation & Single Failure Design Criteria.Caused by Ae Design Error.Check Valve Installed & Ltr Re Error Sent to B&R.Part 21 Related
page: https://kanterella.com/05000397/LER-2D1988-2D002-2C_-3Aon_880122-2Cdiscovered_RCIC_Pump_Suction_Line_Failed_to_Meet_Containment_Isolation_-26_Single_Failure_Design_Criteria.Caused_by_Ae_Design_Error.C…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000397/LER-1988-002, :on 880122,discovered RCIC Pump Suction Line Failed to Meet Containment Isolation & Single Failure Design Criteria.Caused by Ae Design Error.Check Valve Installed & Ltr Re Error Sent to B&R.Part 21 Related

LER-1988-019, :on 880527,determined That Control Room Emergency Filtration Sys Actuation Occurred on 880520.Caused by Technician Failure to Reset Trip Logic During Response Time Test Due to Inadequate Procedure
type: Subject
label: 05000397/LER-1988-019, :on 880527,determined That Control Room Emergency Filtration Sys Actuation Occurred on 880520.Caused by Technician Failure to Reset Trip Logic During Response Time Test Due to Inadequate Procedure
page: https://kanterella.com/05000397/LER-2D1988-2D019-2C_-3Aon_880527-2Cdetermined_That_Control_Room_Emergency_Filtration_Sys_Actuation_Occurred_on_880520.Caused_by_Technician_Failure_to_Reset_Trip_Logic_D…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000397/LER-1988-019, :on 880527,determined That Control Room Emergency Filtration Sys Actuation Occurred on 880520.Caused by Technician Failure to Reset Trip Logic During Response Time Test Due to Inadequate Procedure

LER-1988-018, :on 880522,noted That Green Status Indicating Light for Div Two Emergency Diesel Generator Start Circuit Not Energized.Control Power Transfer Switch Was Not in Required Position.Switch Replaced
type: Subject
label: 05000397/LER-1988-018, :on 880522,noted That Green Status Indicating Light for Div Two Emergency Diesel Generator Start Circuit Not Energized.Control Power Transfer Switch Was Not in Required Position.Switch Replaced
page: https://kanterella.com/05000397/LER-2D1988-2D018-2C_-3Aon_880522-2Cnoted_That_Green_Status_Indicating_Light_for_Div_Two_Emergency_Diesel_Generator_Start_Circuit_Not_Energized.Control_Power_Transfer_Sw…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000397/LER-1988-018, :on 880522,noted That Green Status Indicating Light for Div Two Emergency Diesel Generator Start Circuit Not Energized.Control Power Transfer Switch Was Not in Required Position.Switch Replaced

LER-1989-003-01, :on 890321,unit Received Containment Isolation Actuation Signal.Caused by Personnel Error.Splash Guard Installed on 12 Cylinder Engine for Diesel Generators 2A & 2B to Prevent Spurious Pressure Trips
type: Subject
label: 05000389/LER-1989-003-01, :on 890321,unit Received Containment Isolation Actuation Signal.Caused by Personnel Error.Splash Guard Installed on 12 Cylinder Engine for Diesel Generators 2A & 2B to Prevent Spurious Pressure Trips
page: https://kanterella.com/05000389/LER-2D1989-2D003-2D01-2C_-3Aon_890321-2Cunit_Received_Containment_Isolation_Actuation_Signal.Caused_by_Personnel_Error.Splash_Guard_Installed_on_12_Cylinder_Engine_for_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000389/LER-1989-003-01, :on 890321,unit Received Containment Isolation Actuation Signal.Caused by Personnel Error.Splash Guard Installed on 12 Cylinder Engine for Diesel Generators 2A & 2B to Prevent Spurious Pressure Trips

LER-1989-008-02, :on 890924,plant Engineer Failed to Follow Approved Plant Procedures & Performed Improper Surveillance on Safety Injection Header Check Valves.Caused by Personnel Error.Involved Check Valves Tested
type: Subject
label: 05000389/LER-1989-008-02, :on 890924,plant Engineer Failed to Follow Approved Plant Procedures & Performed Improper Surveillance on Safety Injection Header Check Valves.Caused by Personnel Error.Involved Check Valves Tested
page: https://kanterella.com/05000389/LER-2D1989-2D008-2D02-2C_-3Aon_890924-2Cplant_Engineer_Failed_to_Follow_Approved_Plant_Procedures_-26_Performed_Improper_Surveillance_on_Safety_Injection_Header_Check_V…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000389/LER-1989-008-02, :on 890924,plant Engineer Failed to Follow Approved Plant Procedures & Performed Improper Surveillance on Safety Injection Header Check Valves.Caused by Personnel Error.Involved Check Valves Tested

LER-1989-009-12, :on 891128,containment Local Leak Rate on Containment Penetration 10 Containing Exhaust Line for Containment Purge Sys Exceeded Tech Specs.Cause Not Determined.Valve Seat Travel Stop Adjusted
type: Subject
label: 05000389/LER-1989-009-12, :on 891128,containment Local Leak Rate on Containment Penetration 10 Containing Exhaust Line for Containment Purge Sys Exceeded Tech Specs.Cause Not Determined.Valve Seat Travel Stop Adjusted
page: https://kanterella.com/05000389/LER-2D1989-2D009-2D12-2C_-3Aon_891128-2Ccontainment_Local_Leak_Rate_on_Containment_Penetration_10_Containing_Exhaust_Line_for_Containment_Purge_Sys_Exceeded_Tech_Specs.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000389/LER-1989-009-12, :on 891128,containment Local Leak Rate on Containment Penetration 10 Containing Exhaust Line for Containment Purge Sys Exceeded Tech Specs.Cause Not Determined.Valve Seat Travel Stop Adjusted

LER-1989-002-03, :on 890614,diesel 1B Fuel Oil Transfer Pump Discharge Found in Locked Closed Position.Caused by Personnel Error by Util non-licensed Operator.Valve Reopened & Locked Open & Operators Counseled
type: Subject
label: 05000335/LER-1989-002-03, :on 890614,diesel 1B Fuel Oil Transfer Pump Discharge Found in Locked Closed Position.Caused by Personnel Error by Util non-licensed Operator.Valve Reopened & Locked Open & Operators Counseled
page: https://kanterella.com/05000335/LER-2D1989-2D002-2D03-2C_-3Aon_890614-2Cdiesel_1B_Fuel_Oil_Transfer_Pump_Discharge_Found_in_Locked_Closed_Position.Caused_by_Personnel_Error_by_Util_non-2Dlicensed_Oper…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000335/LER-1989-002-03, :on 890614,diesel 1B Fuel Oil Transfer Pump Discharge Found in Locked Closed Position.Caused by Personnel Error by Util non-licensed Operator.Valve Reopened & Locked Open & Operators Counseled

Greater than 40- Degradation Not Plugged Per Tech Spec Requirement.Caused by Personnel Error.Plugging List Reviewed & Automated & Newly Installed Plugs Will Be Verified
type: Subject
label: 05000335/LER-1988-006-02, :on 880723,steam Generator Tubes W/Greater than 40% Degradation Not Plugged Per Tech Spec Requirement.Caused by Personnel Error.Plugging List Reviewed & Automated & Newly Installed Plugs Will Be Verified
page: https://kanterella.com/05000335/LER-2D1988-2D006-2D02-2C_-3Aon_880723-2Csteam_Generator_Tubes_W/Greater_than_40-_Degradation_Not_Plugged_Per_Tech_Spec_Requirement.Caused_by_Personnel_Error.Plugging_Li…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000335/LER-1988-006-02, :on 880723,steam Generator Tubes W/Greater than 40% Degradation Not Plugged Per Tech Spec Requirement.Caused by Personnel Error.Plugging List Reviewed & Automated & Newly Installed Plugs Will Be Verified

LER-1988-004-01, :on 880407,sample of Reactor Coolant Specific Activity on Dose Equivalent I-131 Was Taken 8 H Past Tech Specs Limits.Caused by Program Error on Thermal Power Change Alarm Setpoint.Program Error Corrected
type: Subject
label: 05000389/LER-1988-004-01, :on 880407,sample of Reactor Coolant Specific Activity on Dose Equivalent I-131 Was Taken 8 H Past Tech Specs Limits.Caused by Program Error on Thermal Power Change Alarm Setpoint.Program Error Corrected
page: https://kanterella.com/05000389/LER-2D1988-2D004-2D01-2C_-3Aon_880407-2Csample_of_Reactor_Coolant_Specific_Activity_on_Dose_Equivalent_I-2D131_Was_Taken_8_H_Past_Tech_Specs_Limits.Caused_by_Program_Er…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000389/LER-1988-004-01, :on 880407,sample of Reactor Coolant Specific Activity on Dose Equivalent I-131 Was Taken 8 H Past Tech Specs Limits.Caused by Program Error on Thermal Power Change Alarm Setpoint.Program Error Corrected

LER-1987-007-02, :on 871125,reactor Tripped on Loss of Load Due to Turbine Trip Caused by Failure of Main Generator Exciter Bearing.Root Cause Is Personnel Error.Electrical Maint Personnel Trained & Procedures Revised
type: Subject
label: 05000389/LER-1987-007-02, :on 871125,reactor Tripped on Loss of Load Due to Turbine Trip Caused by Failure of Main Generator Exciter Bearing.Root Cause Is Personnel Error.Electrical Maint Personnel Trained & Procedures Revised
page: https://kanterella.com/05000389/LER-2D1987-2D007-2D02-2C_-3Aon_871125-2Creactor_Tripped_on_Loss_of_Load_Due_to_Turbine_Trip_Caused_by_Failure_of_Main_Generator_Exciter_Bearing.Root_Cause_Is_Personnel_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000389/LER-1987-007-02, :on 871125,reactor Tripped on Loss of Load Due to Turbine Trip Caused by Failure of Main Generator Exciter Bearing.Root Cause Is Personnel Error.Electrical Maint Personnel Trained & Procedures Revised

LER-1987-014-02, :on 871008,unidentified RCS Leakage Greater than Tech Spec Limit Discovered.Caused by Weld Joint Failure Due to Previous Misalignment of Listed Flanges.Reactor Shut Down & Required Repairs Performed
type: Subject
label: 05000335/LER-1987-014-02, :on 871008,unidentified RCS Leakage Greater than Tech Spec Limit Discovered.Caused by Weld Joint Failure Due to Previous Misalignment of Listed Flanges.Reactor Shut Down & Required Repairs Performed
page: https://kanterella.com/05000335/LER-2D1987-2D014-2D02-2C_-3Aon_871008-2Cunidentified_RCS_Leakage_Greater_than_Tech_Spec_Limit_Discovered.Caused_by_Weld_Joint_Failure_Due_to_Previous_Misalignment_of_Li…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000335/LER-1987-014-02, :on 871008,unidentified RCS Leakage Greater than Tech Spec Limit Discovered.Caused by Weld Joint Failure Due to Previous Misalignment of Listed Flanges.Reactor Shut Down & Required Repairs Performed

O Shield Bldg Integrity.Caused by Inadequate Procedural Controls of Shield Bldg Doors Once Checked as Being Closed.Operating Procedure 1-0030120 Will Be Revised
type: Subject
label: 05000335/LER-1987-015-02, :on 871014,Mode 4 Entered W/O Shield Bldg Integrity.Caused by Inadequate Procedural Controls of Shield Bldg Doors Once Checked as Being Closed.Operating Procedure 1-0030120 Will Be Revised
page: https://kanterella.com/05000335/LER-2D1987-2D015-2D02-2C_-3Aon_871014-2CMode_4_Entered_W/O_Shield_Bldg_Integrity.Caused_by_Inadequate_Procedural_Controls_of_Shield_Bldg_Doors_Once_Checked_as_Being_Clo…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000335/LER-1987-015-02, :on 871014,Mode 4 Entered W/O Shield Bldg Integrity.Caused by Inadequate Procedural Controls of Shield Bldg Doors Once Checked as Being Closed.Operating Procedure 1-0030120 Will Be Revised

LER-1987-003-03, :on 870409,during Troubleshooting,Jumper Placed on Wrong Terminal of Main Steam Isolation Signal (MSIS) Actuation Pushbutton Circuitry,Causing Actuation of Msis. Caused by Cognitive Personnel Error
type: Subject
label: 05000389/LER-1987-003-03, :on 870409,during Troubleshooting,Jumper Placed on Wrong Terminal of Main Steam Isolation Signal (MSIS) Actuation Pushbutton Circuitry,Causing Actuation of Msis. Caused by Cognitive Personnel Error
page: https://kanterella.com/05000389/LER-2D1987-2D003-2D03-2C_-3Aon_870409-2Cduring_Troubleshooting-2CJumper_Placed_on_Wrong_Terminal_of_Main_Steam_Isolation_Signal_-28MSIS-29_Actuation_Pushbutton_Circuitr…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000389/LER-1987-003-03, :on 870409,during Troubleshooting,Jumper Placed on Wrong Terminal of Main Steam Isolation Signal (MSIS) Actuation Pushbutton Circuitry,Causing Actuation of Msis. Caused by Cognitive Personnel Error

isolate Switch for Letdown Isolation Valve Discovered in Isolate Position Due to False Electrical Signals Generated on 880313.Caused by Operator Misinterpretation of Wiring Diagram
type: Subject
label: 05000389/LER-1988-003-03, :on 880313,normal/isolate Switch for Letdown Isolation Valve Discovered in Isolate Position Due to False Electrical Signals Generated on 880313.Caused by Operator Misinterpretation of Wiring Diagram
page: https://kanterella.com/05000389/LER-2D1988-2D003-2D03-2C_-3Aon_880313-2Cnormal/isolate_Switch_for_Letdown_Isolation_Valve_Discovered_in_Isolate_Position_Due_to_False_Electrical_Signals_Generated_on_88…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000389/LER-1988-003-03, :on 880313,normal/isolate Switch for Letdown Isolation Valve Discovered in Isolate Position Due to False Electrical Signals Generated on 880313.Caused by Operator Misinterpretation of Wiring Diagram

05000387/LER-1989-019, :on 890526,determined That Damaged Fire Seals Inoperable.Caused by Failure to Identify Penetration Seal Damage on Fire Rating/Operability of Penetrations.Fire Watch Established
type: Subject
page: https://kanterella.com/05000387/LER-2D1989-2D019-2C_-3Aon_890526-2Cdetermined_That_Damaged_Fire_Seals_Inoperable.Caused_by_Failure_to_Identify_Penetration_Seal_Damage_on_Fire_Rating/Operability_of_Pen…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000387/LER-1989-019, :on 890526,determined That Damaged Fire Seals Inoperable.Caused by Failure to Identify Penetration Seal Damage on Fire Rating/Operability of Penetrations.Fire Watch Established

LER-1989-003-01, :on 890124,control Room Ventilation Sys Shift to Recirculation Mode During Channel Check Occurred.Caused by Flaw in Design of Radiation Monitor Circuit Module.Work Instruction Revised
type: Subject
label: 05000250/LER-1989-003-01, :on 890124,control Room Ventilation Sys Shift to Recirculation Mode During Channel Check Occurred.Caused by Flaw in Design of Radiation Monitor Circuit Module.Work Instruction Revised
page: https://kanterella.com/05000250/LER-2D1989-2D003-2D01-2C_-3Aon_890124-2Ccontrol_Room_Ventilation_Sys_Shift_to_Recirculation_Mode_During_Channel_Check_Occurred.Caused_by_Flaw_in_Design_of_Radiation_Mon…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1989-003-01, :on 890124,control Room Ventilation Sys Shift to Recirculation Mode During Channel Check Occurred.Caused by Flaw in Design of Radiation Monitor Circuit Module.Work Instruction Revised

LER-1989-001, :on 890110,emergency Diesel Generator (EDG) B & Intake Cooling Water Pump 3A Out of Svc During Same Time. Caused by Operability Test Being Performed.Edg Returned to Svc on 890110 & Pump Checked
type: Subject
label: 05000250/LER-1989-001, :on 890110,emergency Diesel Generator (EDG) B & Intake Cooling Water Pump 3A Out of Svc During Same Time. Caused by Operability Test Being Performed.Edg Returned to Svc on 890110 & Pump Checked
page: https://kanterella.com/05000250/LER-2D1989-2D001-2C_-3Aon_890110-2Cemergency_Diesel_Generator_-28EDG-29_B_-26_Intake_Cooling_Water_Pump_3A_Out_of_Svc_During_Same_Time._Caused_by_Operability_Test_Being…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1989-001, :on 890110,emergency Diesel Generator (EDG) B & Intake Cooling Water Pump 3A Out of Svc During Same Time. Caused by Operability Test Being Performed.Edg Returned to Svc on 890110 & Pump Checked

Std ASTM Sampling Procedures.Procedure Revised
type: Subject
label: 05000250/LER-1987-007-01, :on 870128,diesel Fuel Storage Tank Sample Did Not Meet Tech Spec Surveillance Requirements.Caused by Not Using Sampling Techniques in Accordance W/Std ASTM Sampling Procedures.Procedure Revised
page: https://kanterella.com/05000250/LER-2D1987-2D007-2D01-2C_-3Aon_870128-2Cdiesel_Fuel_Storage_Tank_Sample_Did_Not_Meet_Tech_Spec_Surveillance_Requirements.Caused_by_Not_Using_Sampling_Techniques_in_Acco…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000250/LER-1987-007-01, :on 870128,diesel Fuel Storage Tank Sample Did Not Meet Tech Spec Surveillance Requirements.Caused by Not Using Sampling Techniques in Accordance W/Std ASTM Sampling Procedures.Procedure Revised

LER-1987-014, :on 870711,water Dripping from Auxiliary Feedwater(Afw) Steam Line Discovered & on 870717,AFW Train 1 Declared Inoperable.Cause of Leak Unknown.Affected Piping & Fitting Replaced
type: Subject
label: 05000251/LER-1987-014, :on 870711,water Dripping from Auxiliary Feedwater(Afw) Steam Line Discovered & on 870717,AFW Train 1 Declared Inoperable.Cause of Leak Unknown.Affected Piping & Fitting Replaced
page: https://kanterella.com/05000251/LER-2D1987-2D014-2C_-3Aon_870711-2Cwater_Dripping_from_Auxiliary_Feedwater-28Afw-29_Steam_Line_Discovered_-26_on_870717-2CAFW_Train_1_Declared_Inoperable.Cause_of_Leak_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355
wiki page sort key: 05000251/LER-1987-014, :on 870711,water Dripping from Auxiliary Feedwater(Afw) Steam Line Discovered & on 870717,AFW Train 1 Declared Inoperable.Cause of Leak Unknown.Affected Piping & Fitting Replaced

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