NRC Form 355A
type: Ontology
creation date: 2025-12-06T23:22:16-05:00
imports: http://semantic-mediawiki.org/swivt/1.0

NRC Form 355A
type: Subject
page: https://kanterella.com/NRC_Form_355A
wiki namespace: 0
wiki page content language: en
wiki page sort key: NRC Form 355A

LER-1991-004, :on 910320,supply Breaker Between non-Class IE 13.8 Kv Switchgear Buses Opened,Resulting in Loss of Power to Train a Class 1E 4.16 Kv Bus.Caused by Personnel Error. Preventive Maint Suspended
type: Subject
label: 05000528/LER-1991-004, :on 910320,supply Breaker Between non-Class IE 13.8 Kv Switchgear Buses Opened,Resulting in Loss of Power to Train a Class 1E 4.16 Kv Bus.Caused by Personnel Error. Preventive Maint Suspended
page: https://kanterella.com/05000528/LER-2D1991-2D004-2C_-3Aon_910320-2Csupply_Breaker_Between_non-2DClass_IE_13.8_Kv_Switchgear_Buses_Opened-2CResulting_in_Loss_of_Power_to_Train_a_Class_1E_4.16_Kv_Bus.Ca…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000528/LER-1991-004, :on 910320,supply Breaker Between non-Class IE 13.8 Kv Switchgear Buses Opened,Resulting in Loss of Power to Train a Class 1E 4.16 Kv Bus.Caused by Personnel Error. Preventive Maint Suspended

LER-1989-017-01, :on 890728,radiation Monitor ARE-2532B High Alarm Setpoint Resulted in Fuel Handling Bldg Isolation. Cause Unknown.Alarm Setpoint Raised & Procedure 35611-C Revised Re Panel Operating Steps
type: Subject
label: 05000424/LER-1989-017-01, :on 890728,radiation Monitor ARE-2532B High Alarm Setpoint Resulted in Fuel Handling Bldg Isolation. Cause Unknown.Alarm Setpoint Raised & Procedure 35611-C Revised Re Panel Operating Steps
page: https://kanterella.com/05000424/LER-2D1989-2D017-2D01-2C_-3Aon_890728-2Cradiation_Monitor_ARE-2D2532B_High_Alarm_Setpoint_Resulted_in_Fuel_Handling_Bldg_Isolation._Cause_Unknown.Alarm_Setpoint_Raised_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000424/LER-1989-017-01, :on 890728,radiation Monitor ARE-2532B High Alarm Setpoint Resulted in Fuel Handling Bldg Isolation. Cause Unknown.Alarm Setpoint Raised & Procedure 35611-C Revised Re Panel Operating Steps

05000259/LER-1997-001-03, :on 970203,potential Overpressurization Containment Penetration Pipe Occurred Due to Thermal Expansion of Entrapped Water Was Identified.Plant Procedures Will Be Revised
type: Subject
page: https://kanterella.com/05000259/LER-2D1997-2D001-2D03-2C_-3Aon_970203-2Cpotential_Overpressurization_Containment_Penetration_Pipe_Occurred_Due_to_Thermal_Expansion_of_Entrapped_Water_Was_Identified.Pl…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000259/LER-1997-001-03, :on 970203,potential Overpressurization Containment Penetration Pipe Occurred Due to Thermal Expansion of Entrapped Water Was Identified.Plant Procedures Will Be Revised

LER-1985-011, :on 850116,fuse Supplying Power to Outboard Isolation Logic Relays in Nuclear Steam Supply Shutoff Sys Blew,Resulting in Isolation of Reactor Encl HVAC Sys.Caused by Electrical Short.Fuse Replaced
type: Subject
label: 05000352/LER-1985-011, :on 850116,fuse Supplying Power to Outboard Isolation Logic Relays in Nuclear Steam Supply Shutoff Sys Blew,Resulting in Isolation of Reactor Encl HVAC Sys.Caused by Electrical Short.Fuse Replaced
page: https://kanterella.com/05000352/LER-2D1985-2D011-2C_-3Aon_850116-2Cfuse_Supplying_Power_to_Outboard_Isolation_Logic_Relays_in_Nuclear_Steam_Supply_Shutoff_Sys_Blew-2CResulting_in_Isolation_of_Reactor_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000352/LER-1985-011, :on 850116,fuse Supplying Power to Outboard Isolation Logic Relays in Nuclear Steam Supply Shutoff Sys Blew,Resulting in Isolation of Reactor Encl HVAC Sys.Caused by Electrical Short.Fuse Replaced

App R Commitments Since Min Cable Separation Did Not Meet Reg Guide 1.75 Requirements.Caused by Improper Installation & Reinstallation
type: Subject
label: 05000280/LER-1989-004, :on 890215,determined That Cable Tray Covers Did Not Comply W/App R Commitments Since Min Cable Separation Did Not Meet Reg Guide 1.75 Requirements.Caused by Improper Installation & Reinstallation
page: https://kanterella.com/05000280/LER-2D1989-2D004-2C_-3Aon_890215-2Cdetermined_That_Cable_Tray_Covers_Did_Not_Comply_W/App_R_Commitments_Since_Min_Cable_Separation_Did_Not_Meet_Reg_Guide_1.75_Requireme…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000280/LER-1989-004, :on 890215,determined That Cable Tray Covers Did Not Comply W/App R Commitments Since Min Cable Separation Did Not Meet Reg Guide 1.75 Requirements.Caused by Improper Installation & Reinstallation

LER-1994-006, :on 940511,manual Reactor Trip Occurred During Safeguards Actuation Logic Testing.Caused by Inadvertent Actuation of Relay in Safety Injection Actuation Circuitry. Reactor Placed in Safe,Hot Shutdown Condition
type: Subject
label: 05000280/LER-1994-006, :on 940511,manual Reactor Trip Occurred During Safeguards Actuation Logic Testing.Caused by Inadvertent Actuation of Relay in Safety Injection Actuation Circuitry. Reactor Placed in Safe,Hot Shutdown Condition
page: https://kanterella.com/05000280/LER-2D1994-2D006-2C_-3Aon_940511-2Cmanual_Reactor_Trip_Occurred_During_Safeguards_Actuation_Logic_Testing.Caused_by_Inadvertent_Actuation_of_Relay_in_Safety_Injection_A…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000280/LER-1994-006, :on 940511,manual Reactor Trip Occurred During Safeguards Actuation Logic Testing.Caused by Inadvertent Actuation of Relay in Safety Injection Actuation Circuitry. Reactor Placed in Safe,Hot Shutdown Condition

LER-1990-006-01, :on 891027,discovered Unverified Assumption in App R Safe Shutdown Analysis.Caused by Fire Protection Program Failure to Provide Detailed Procedural Instructions for Operator Actions.New Procedures Developed
type: Subject
label: 05000220/LER-1990-006-01, :on 891027,discovered Unverified Assumption in App R Safe Shutdown Analysis.Caused by Fire Protection Program Failure to Provide Detailed Procedural Instructions for Operator Actions.New Procedures Developed
page: https://kanterella.com/05000220/LER-2D1990-2D006-2D01-2C_-3Aon_891027-2Cdiscovered_Unverified_Assumption_in_App_R_Safe_Shutdown_Analysis.Caused_by_Fire_Protection_Program_Failure_to_Provide_Detailed_P…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000220/LER-1990-006-01, :on 891027,discovered Unverified Assumption in App R Safe Shutdown Analysis.Caused by Fire Protection Program Failure to Provide Detailed Procedural Instructions for Operator Actions.New Procedures Developed

05000296/LER-1988-005-04, :on 881108,loss of Power to 4160 Volt Shutdown Board Due to Inadequate Breaker Alignment Causes ESF Actuations.Breaker Reinstalled & Properly Racked Into Normal Position
type: Subject
page: https://kanterella.com/05000296/LER-2D1988-2D005-2D04-2C_-3Aon_881108-2Closs_of_Power_to_4160_Volt_Shutdown_Board_Due_to_Inadequate_Breaker_Alignment_Causes_ESF_Actuations.Breaker_Reinstalled_-26_Prop…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000296/LER-1988-005-04, :on 881108,loss of Power to 4160 Volt Shutdown Board Due to Inadequate Breaker Alignment Causes ESF Actuations.Breaker Reinstalled & Properly Racked Into Normal Position

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 355A
wiki page sort key: 05000400/LER-1990-022-01, :on 901108,missed Surveillance Test for Secondary Waste Sample Tank Due to Incorrect Procedure Rev

05000400/LER-1990-019-01, :on 900824,potential Loss of RHR Sys Noted Due to Loss of Ccw.Caused by Sys Design
type: Subject
page: https://kanterella.com/05000400/LER-2D1990-2D019-2D01-2C_-3Aon_900824-2Cpotential_Loss_of_RHR_Sys_Noted_Due_to_Loss_of_Ccw.Caused_by_Sys_Design
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000400/LER-1990-019-01, :on 900824,potential Loss of RHR Sys Noted Due to Loss of Ccw.Caused by Sys Design

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 355A
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-1990-014, :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 355A
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

05000400/LER-1990-011, :on 900405,Tech Spec Violation Occurred Due to Missed Tests on Valve.Caused by Procedural Deficiencies. Procedures Revised & Plant Personnel Trained
type: Subject
page: https://kanterella.com/05000400/LER-2D1990-2D011-2C_-3Aon_900405-2CTech_Spec_Violation_Occurred_Due_to_Missed_Tests_on_Valve.Caused_by_Procedural_Deficiencies._Procedures_Revised_-26_Plant_Personnel_T…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000400/LER-1990-011, :on 900405,Tech Spec Violation Occurred Due to Missed Tests on Valve.Caused by Procedural Deficiencies. Procedures Revised & Plant Personnel Trained

LER-1990-008, :on 900314,discrepancy in Amperage Rating of Circuit Breaker Providing Overcurrent Protection for Containment Penetration Conductor Discovered.Caused by Use of Oversized Breaker.Breaker Upsized
type: Subject
label: 05000400/LER-1990-008, :on 900314,discrepancy in Amperage Rating of Circuit Breaker Providing Overcurrent Protection for Containment Penetration Conductor Discovered.Caused by Use of Oversized Breaker.Breaker Upsized
page: https://kanterella.com/05000400/LER-2D1990-2D008-2C_-3Aon_900314-2Cdiscrepancy_in_Amperage_Rating_of_Circuit_Breaker_Providing_Overcurrent_Protection_for_Containment_Penetration_Conductor_Discovered.C…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000400/LER-1990-008, :on 900314,discrepancy in Amperage Rating of Circuit Breaker Providing Overcurrent Protection for Containment Penetration Conductor Discovered.Caused by Use of Oversized Breaker.Breaker Upsized

LER-1989-015-01, :on 890827,discovered That Fuel Handling Bldg Operating Floor Equipment Hatch in Storage Location on Operating Deck Not Installed as Required.Caused by Inadequate Procedure.Procedure Revised
type: Subject
label: 05000400/LER-1989-015-01, :on 890827,discovered That Fuel Handling Bldg Operating Floor Equipment Hatch in Storage Location on Operating Deck Not Installed as Required.Caused by Inadequate Procedure.Procedure Revised
page: https://kanterella.com/05000400/LER-2D1989-2D015-2D01-2C_-3Aon_890827-2Cdiscovered_That_Fuel_Handling_Bldg_Operating_Floor_Equipment_Hatch_in_Storage_Location_on_Operating_Deck_Not_Installed_as_Requir…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000400/LER-1989-015-01, :on 890827,discovered That Fuel Handling Bldg Operating Floor Equipment Hatch in Storage Location on Operating Deck Not Installed as Required.Caused by Inadequate Procedure.Procedure Revised

plant in Mode 1,reduction of Turbine Load Ensued & Turbine Trip Occurred Due to Low Condenser Vacuum Resulting in Automatic Reactor Trip.Caused by Personnel Error.Personnel Counselled
type: Subject
label: 05000400/LER-1989-001, :on 890116,w/plant in Mode 1,reduction of Turbine Load Ensued & Turbine Trip Occurred Due to Low Condenser Vacuum Resulting in Automatic Reactor Trip.Caused by Personnel Error.Personnel Counselled
page: https://kanterella.com/05000400/LER-2D1989-2D001-2C_-3Aon_890116-2Cw/plant_in_Mode_1-2Creduction_of_Turbine_Load_Ensued_-26_Turbine_Trip_Occurred_Due_to_Low_Condenser_Vacuum_Resulting_in_Automatic_Rea…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000400/LER-1989-001, :on 890116,w/plant in Mode 1,reduction of Turbine Load Ensued & Turbine Trip Occurred Due to Low Condenser Vacuum Resulting in Automatic Reactor Trip.Caused by Personnel Error.Personnel Counselled

LER-1989-004, :on 890207,loss of All Three Circulating Water Pumps Resulted in Loss of All Flow to Main Condenser, Causing Reactor Trip.Caused by Air Entering Circulating Water Pump Seal Water Sys.Components Repaired
type: Subject
label: 05000400/LER-1989-004, :on 890207,loss of All Three Circulating Water Pumps Resulted in Loss of All Flow to Main Condenser, Causing Reactor Trip.Caused by Air Entering Circulating Water Pump Seal Water Sys.Components Repaired
page: https://kanterella.com/05000400/LER-2D1989-2D004-2C_-3Aon_890207-2Closs_of_All_Three_Circulating_Water_Pumps_Resulted_in_Loss_of_All_Flow_to_Main_Condenser-2C_Causing_Reactor_Trip.Caused_by_Air_Enteri…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000400/LER-1989-004, :on 890207,loss of All Three Circulating Water Pumps Resulted in Loss of All Flow to Main Condenser, Causing Reactor Trip.Caused by Air Entering Circulating Water Pump Seal Water Sys.Components Repaired

LER-1988-027, :on 880907,chemistry Technicians Failed to Obtain Gas Grab Sample at Required Time.Specific Technician Designated to Perform Compensatory Sampling Until All Compensatory Surveillance Requirements Met
type: Subject
label: 05000400/LER-1988-027, :on 880907,chemistry Technicians Failed to Obtain Gas Grab Sample at Required Time.Specific Technician Designated to Perform Compensatory Sampling Until All Compensatory Surveillance Requirements Met
page: https://kanterella.com/05000400/LER-2D1988-2D027-2C_-3Aon_880907-2Cchemistry_Technicians_Failed_to_Obtain_Gas_Grab_Sample_at_Required_Time.Specific_Technician_Designated_to_Perform_Compensatory_Sampli…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000400/LER-1988-027, :on 880907,chemistry Technicians Failed to Obtain Gas Grab Sample at Required Time.Specific Technician Designated to Perform Compensatory Sampling Until All Compensatory Surveillance Requirements Met

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 355A
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-1987-039, :on 870619,intermediate Range (IR) High Neutron Flux Trip Setpoint Found Out of Calibr.Caused by Previous Adjustment to IR Setpoints.New Scaling Currents for 25- Trip Incorporated Into Applicable Procedures
type: Subject
label: 05000400/LER-1987-039, :on 870619,intermediate Range (IR) High Neutron Flux Trip Setpoint Found Out of Calibr.Caused by Previous Adjustment to IR Setpoints.New Scaling Currents for 25% Trip Incorporated Into Applicable Procedures
page: https://kanterella.com/05000400/LER-2D1987-2D039-2C_-3Aon_870619-2Cintermediate_Range_-28IR-29_High_Neutron_Flux_Trip_Setpoint_Found_Out_of_Calibr.Caused_by_Previous_Adjustment_to_IR_Setpoints.New_Sca…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000400/LER-1987-039, :on 870619,intermediate Range (IR) High Neutron Flux Trip Setpoint Found Out of Calibr.Caused by Previous Adjustment to IR Setpoints.New Scaling Currents for 25% Trip Incorporated Into Applicable Procedures

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 355A
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

05000250/LER-1990-021, :on 901018,determined That Length of Time CCW Headers Split for Movement of Heavy Loads Exceeded Appropriate Action Statement Time Limit That Should Have Been Imposed
type: Subject
page: https://kanterella.com/05000250/LER-2D1990-2D021-2C_-3Aon_901018-2Cdetermined_That_Length_of_Time_CCW_Headers_Split_for_Movement_of_Heavy_Loads_Exceeded_Appropriate_Action_Statement_Time_Limit_That_Sh…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000250/LER-1990-021, :on 901018,determined That Length of Time CCW Headers Split for Movement of Heavy Loads Exceeded Appropriate Action Statement Time Limit That Should Have Been Imposed

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 355A
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-1987-015, :on 870522,design Basis Reconstitution Revealed Potential Loss of HVAC in Inverter & Battery Rooms.Caused by Mods to Original Plant Design.Maint & Insp Procedures Implemented for Air Conditioning Units
type: Subject
label: 05000250/LER-1987-015, :on 870522,design Basis Reconstitution Revealed Potential Loss of HVAC in Inverter & Battery Rooms.Caused by Mods to Original Plant Design.Maint & Insp Procedures Implemented for Air Conditioning Units
page: https://kanterella.com/05000250/LER-2D1987-2D015-2C_-3Aon_870522-2Cdesign_Basis_Reconstitution_Revealed_Potential_Loss_of_HVAC_in_Inverter_-26_Battery_Rooms.Caused_by_Mods_to_Original_Plant_Design.Mai…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000250/LER-1987-015, :on 870522,design Basis Reconstitution Revealed Potential Loss of HVAC in Inverter & Battery Rooms.Caused by Mods to Original Plant Design.Maint & Insp Procedures Implemented for Air Conditioning Units

LER-1987-014, :on 870519,while Unit in Mode 6,determined That Design Discrepancy Existed in Containment Spray Sys.Caused by Flow Orifice in Discharge Line Not Incorporated in Field. Design Mods Will Be Implemented for Correction
type: Subject
label: 05000250/LER-1987-014, :on 870519,while Unit in Mode 6,determined That Design Discrepancy Existed in Containment Spray Sys.Caused by Flow Orifice in Discharge Line Not Incorporated in Field. Design Mods Will Be Implemented for Correction
page: https://kanterella.com/05000250/LER-2D1987-2D014-2C_-3Aon_870519-2Cwhile_Unit_in_Mode_6-2Cdetermined_That_Design_Discrepancy_Existed_in_Containment_Spray_Sys.Caused_by_Flow_Orifice_in_Discharge_Line_N…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000250/LER-1987-014, :on 870519,while Unit in Mode 6,determined That Design Discrepancy Existed in Containment Spray Sys.Caused by Flow Orifice in Discharge Line Not Incorporated in Field. Design Mods Will Be Implemented for Correction

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 355A
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

05000250/LER-1989-007, :on 890316,surveillance for Snubber Missed. Caused by Weakness in Snubber Testing Program.Snubber Removed & Functionally Tested & Replaced W/Spare Snubber.W/
type: Subject
page: https://kanterella.com/05000250/LER-2D1989-2D007-2C_-3Aon_890316-2Csurveillance_for_Snubber_Missed._Caused_by_Weakness_in_Snubber_Testing_Program.Snubber_Removed_-26_Functionally_Tested_-26_Replaced_W…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000250/LER-1989-007, :on 890316,surveillance for Snubber Missed. Caused by Weakness in Snubber Testing Program.Snubber Removed & Functionally Tested & Replaced W/Spare Snubber.W/

LER-1987-024-01, :on 871008,temp for Boric Acid Heat Tracing Circuit Number 6 Decreased Below 145 F.Caused by Cold Flushing of Crosstie Line.Flushing of Boric Acid Pump Crosstie Line Stopped & Sys Alignment Restored
type: Subject
label: 05000251/LER-1987-024-01, :on 871008,temp for Boric Acid Heat Tracing Circuit Number 6 Decreased Below 145 F.Caused by Cold Flushing of Crosstie Line.Flushing of Boric Acid Pump Crosstie Line Stopped & Sys Alignment Restored
page: https://kanterella.com/05000251/LER-2D1987-2D024-2D01-2C_-3Aon_871008-2Ctemp_for_Boric_Acid_Heat_Tracing_Circuit_Number_6_Decreased_Below_145_F.Caused_by_Cold_Flushing_of_Crosstie_Line.Flushing_of_Bor…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000251/LER-1987-024-01, :on 871008,temp for Boric Acid Heat Tracing Circuit Number 6 Decreased Below 145 F.Caused by Cold Flushing of Crosstie Line.Flushing of Boric Acid Pump Crosstie Line Stopped & Sys Alignment Restored

05000250/LER-1987-024, :on 870913,reactor Controls Manipulated by Nonlicensed Person Under Supervision of Licensed Operator. Caused by Personnel Error.Personnel Counseled
type: Subject
page: https://kanterella.com/05000250/LER-2D1987-2D024-2C_-3Aon_870913-2Creactor_Controls_Manipulated_by_Nonlicensed_Person_Under_Supervision_of_Licensed_Operator._Caused_by_Personnel_Error.Personnel_Counse…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000250/LER-1987-024, :on 870913,reactor Controls Manipulated by Nonlicensed Person Under Supervision of Licensed Operator. Caused by Personnel Error.Personnel Counseled

LER-1988-003, :on 880308,containment Ventilation & Control Room Ventilation Isolation Occurred.Caused by Minor Electrical Transient Upon Failure of One Light Filament. Failed Dual Filament Bulb Replaced
type: Subject
label: 05000250/LER-1988-003, :on 880308,containment Ventilation & Control Room Ventilation Isolation Occurred.Caused by Minor Electrical Transient Upon Failure of One Light Filament. Failed Dual Filament Bulb Replaced
page: https://kanterella.com/05000250/LER-2D1988-2D003-2C_-3Aon_880308-2Ccontainment_Ventilation_-26_Control_Room_Ventilation_Isolation_Occurred.Caused_by_Minor_Electrical_Transient_Upon_Failure_of_One_Ligh…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000250/LER-1988-003, :on 880308,containment Ventilation & Control Room Ventilation Isolation Occurred.Caused by Minor Electrical Transient Upon Failure of One Light Filament. Failed Dual Filament Bulb Replaced

LER-1988-001, :on 880106,Tech Spec 3.3.3.10 Discovered Not Met for 871230-880106 Due to Discovery of Incorrect Lineup for Radiation Monitor VRS-2500.Caused by Personnel Error. Flow Restored to Monitor & Lineup Verified
type: Subject
label: 05000316/LER-1988-001, :on 880106,Tech Spec 3.3.3.10 Discovered Not Met for 871230-880106 Due to Discovery of Incorrect Lineup for Radiation Monitor VRS-2500.Caused by Personnel Error. Flow Restored to Monitor & Lineup Verified
page: https://kanterella.com/05000316/LER-2D1988-2D001-2C_-3Aon_880106-2CTech_Spec_3.3.3.10_Discovered_Not_Met_for_871230-2D880106_Due_to_Discovery_of_Incorrect_Lineup_for_Radiation_Monitor_VRS-2D2500.Cause…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000316/LER-1988-001, :on 880106,Tech Spec 3.3.3.10 Discovered Not Met for 871230-880106 Due to Discovery of Incorrect Lineup for Radiation Monitor VRS-2500.Caused by Personnel Error. Flow Restored to Monitor & Lineup Verified

LER-1995-007, :on 950825,Conax Seal Assemblies on Rv Post- Accident Vent SVs 1-NSO-21 & 1-NSO-23 Found Loose.Missing Ferrules for 1-NSO-21 & 1-NSO-23 Replaced.Determined Event Not Reportable & LER 95-007-00 Cancelled
type: Subject
label: 05000315/LER-1995-007, :on 950825,Conax Seal Assemblies on Rv Post- Accident Vent SVs 1-NSO-21 & 1-NSO-23 Found Loose.Missing Ferrules for 1-NSO-21 & 1-NSO-23 Replaced.Determined Event Not Reportable & LER 95-007-00 Cancelled
page: https://kanterella.com/05000315/LER-2D1995-2D007-2C_-3Aon_950825-2CConax_Seal_Assemblies_on_Rv_Post-2D_Accident_Vent_SVs_1-2DNSO-2D21_-26_1-2DNSO-2D23_Found_Loose.Missing_Ferrules_for_1-2DNSO-2D21_-26…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000315/LER-1995-007, :on 950825,Conax Seal Assemblies on Rv Post- Accident Vent SVs 1-NSO-21 & 1-NSO-23 Found Loose.Missing Ferrules for 1-NSO-21 & 1-NSO-23 Replaced.Determined Event Not Reportable & LER 95-007-00 Cancelled

05000316/LER-1995-005-01, :on 950829,RT Occurred on High Negative Rate Resulted from Trip of Both CRD-MG Sets Due to mis-adjusted Voltage Regulators.Replaced CRD-MG Common Bus Overvoltage Relay Body
type: Subject
page: https://kanterella.com/05000316/LER-2D1995-2D005-2D01-2C_-3Aon_950829-2CRT_Occurred_on_High_Negative_Rate_Resulted_from_Trip_of_Both_CRD-2DMG_Sets_Due_to_mis-2Dadjusted_Voltage_Regulators.Replaced_CRD…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000316/LER-1995-005-01, :on 950829,RT Occurred on High Negative Rate Resulted from Trip of Both CRD-MG Sets Due to mis-adjusted Voltage Regulators.Replaced CRD-MG Common Bus Overvoltage Relay Body

LER-1994-006-01, :on 940906,six MSSVs Failed to Meet TS Lift Setpoint Requirements.Caused by Galling Between Valve Disk & Nozzle.Nrr Issued TS Amend 167 to Unit 2 Ts,Increasing MSSV Tolerance on 940909
type: Subject
label: 05000316/LER-1994-006-01, :on 940906,six MSSVs Failed to Meet TS Lift Setpoint Requirements.Caused by Galling Between Valve Disk & Nozzle.Nrr Issued TS Amend 167 to Unit 2 Ts,Increasing MSSV Tolerance on 940909
page: https://kanterella.com/05000316/LER-2D1994-2D006-2D01-2C_-3Aon_940906-2Csix_MSSVs_Failed_to_Meet_TS_Lift_Setpoint_Requirements.Caused_by_Galling_Between_Valve_Disk_-26_Nozzle.Nrr_Issued_TS_Amend_167_t…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000316/LER-1994-006-01, :on 940906,six MSSVs Failed to Meet TS Lift Setpoint Requirements.Caused by Galling Between Valve Disk & Nozzle.Nrr Issued TS Amend 167 to Unit 2 Ts,Increasing MSSV Tolerance on 940909

05000315/LER-1994-003, :on 940311,main Steam Safety Valve Test Inaccuracy Due to Miscalculation of Valve Seat Area by Vendor.Mssvs Retested After Entering Mode 3
type: Subject
page: https://kanterella.com/05000315/LER-2D1994-2D003-2C_-3Aon_940311-2Cmain_Steam_Safety_Valve_Test_Inaccuracy_Due_to_Miscalculation_of_Valve_Seat_Area_by_Vendor.Mssvs_Retested_After_Entering_Mode_3
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000315/LER-1994-003, :on 940311,main Steam Safety Valve Test Inaccuracy Due to Miscalculation of Valve Seat Area by Vendor.Mssvs Retested After Entering Mode 3

LER-1993-003, :on 921016,discovered That Charcoal Filter Face Dampers Were Closed Instead of Open as Indicated.Caused by Incorrect Solenoid Installation.Procedures Revised & Dampers Verified to Be Installed Correctly
type: Subject
label: 05000316/LER-1993-003, :on 921016,discovered That Charcoal Filter Face Dampers Were Closed Instead of Open as Indicated.Caused by Incorrect Solenoid Installation.Procedures Revised & Dampers Verified to Be Installed Correctly
page: https://kanterella.com/05000316/LER-2D1993-2D003-2C_-3Aon_921016-2Cdiscovered_That_Charcoal_Filter_Face_Dampers_Were_Closed_Instead_of_Open_as_Indicated.Caused_by_Incorrect_Solenoid_Installation.Proce…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000316/LER-1993-003, :on 921016,discovered That Charcoal Filter Face Dampers Were Closed Instead of Open as Indicated.Caused by Incorrect Solenoid Installation.Procedures Revised & Dampers Verified to Be Installed Correctly

LER-1992-006-02, :on 920618 & 19,10 of 20 Main Steam Safety Valve Lift Settings Found Outside of TS Tolerances.Caused by Setpoint Drift.Valves Reset to Acceptable Values & Retested Satisfactorily
type: Subject
label: 05000315/LER-1992-006-02, :on 920618 & 19,10 of 20 Main Steam Safety Valve Lift Settings Found Outside of TS Tolerances.Caused by Setpoint Drift.Valves Reset to Acceptable Values & Retested Satisfactorily
page: https://kanterella.com/05000315/LER-2D1992-2D006-2D02-2C_-3Aon_920618_-26_19-2C10_of_20_Main_Steam_Safety_Valve_Lift_Settings_Found_Outside_of_TS_Tolerances.Caused_by_Setpoint_Drift.Valves_Reset_to_Ac…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000315/LER-1992-006-02, :on 920618 & 19,10 of 20 Main Steam Safety Valve Lift Settings Found Outside of TS Tolerances.Caused by Setpoint Drift.Valves Reset to Acceptable Values & Retested Satisfactorily

05000316/LER-1993-008, :on 930827,reactor Trip Occurred from Steam Flow/Feed Flow Mismatch Coincident W/Low Level in SG 4. Defective current-to-current Repeater Replaced
type: Subject
page: https://kanterella.com/05000316/LER-2D1993-2D008-2C_-3Aon_930827-2Creactor_Trip_Occurred_from_Steam_Flow/Feed_Flow_Mismatch_Coincident_W/Low_Level_in_SG_4._Defective_current-2Dto-2Dcurrent_Repeater_Re…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000316/LER-1993-008, :on 930827,reactor Trip Occurred from Steam Flow/Feed Flow Mismatch Coincident W/Low Level in SG 4. Defective current-to-current Repeater Replaced

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 355A
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

05000315/LER-1991-006, :on 901129,facility Outside Design Basis for Separation of Safety Related & Nonsafety Related Circuits. Caused by Personnel Error.Design Procedures Revised
type: Subject
page: https://kanterella.com/05000315/LER-2D1991-2D006-2C_-3Aon_901129-2Cfacility_Outside_Design_Basis_for_Separation_of_Safety_Related_-26_Nonsafety_Related_Circuits._Caused_by_Personnel_Error.Design_Proce…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000315/LER-1991-006, :on 901129,facility Outside Design Basis for Separation of Safety Related & Nonsafety Related Circuits. Caused by Personnel Error.Design Procedures Revised

Turbine Power Greater than 10-.Caused by Sudden Loss of Main Condenser Vacuum During Diagnostic Testing. Procedure Enhancements Made
type: Subject
label: 05000316/LER-1992-007-01, :on 920702,reactor Tripped from Turbine Trip Coincident W/Turbine Power Greater than 10%.Caused by Sudden Loss of Main Condenser Vacuum During Diagnostic Testing. Procedure Enhancements Made
page: https://kanterella.com/05000316/LER-2D1992-2D007-2D01-2C_-3Aon_920702-2Creactor_Tripped_from_Turbine_Trip_Coincident_W/Turbine_Power_Greater_than_10-.Caused_by_Sudden_Loss_of_Main_Condenser_Vacuum_Dur…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000316/LER-1992-007-01, :on 920702,reactor Tripped from Turbine Trip Coincident W/Turbine Power Greater than 10%.Caused by Sudden Loss of Main Condenser Vacuum During Diagnostic Testing. Procedure Enhancements Made

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 355A
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

LER-1990-002, :on 900108,two MSIVs Exhibited Closing Time in Excess of Tech Spec 3.7.1.5 Limit of 5 S.On 900109 & 10, Confirmed That Excessive Condensation Collected on Vent Side.Caused by Inadequate Insulation
type: Subject
label: 05000316/LER-1990-002, :on 900108,two MSIVs Exhibited Closing Time in Excess of Tech Spec 3.7.1.5 Limit of 5 S.On 900109 & 10, Confirmed That Excessive Condensation Collected on Vent Side.Caused by Inadequate Insulation
page: https://kanterella.com/05000316/LER-2D1990-2D002-2C_-3Aon_900108-2Ctwo_MSIVs_Exhibited_Closing_Time_in_Excess_of_Tech_Spec_3.7.1.5_Limit_of_5_S.On_900109_-26_10-2C_Confirmed_That_Excessive_Condensatio…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000316/LER-1990-002, :on 900108,two MSIVs Exhibited Closing Time in Excess of Tech Spec 3.7.1.5 Limit of 5 S.On 900109 & 10, Confirmed That Excessive Condensation Collected on Vent Side.Caused by Inadequate Insulation

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 355A
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-1991-002-01, :on 910220,discovered That Previous Procedure Rev Omitted Fire Damper from Insp List & Damper Not Included in Surveillance.Cause Not Conclusively Determined.Damper Visually & Functionally Inspected
type: Subject
label: 05000316/LER-1991-002-01, :on 910220,discovered That Previous Procedure Rev Omitted Fire Damper from Insp List & Damper Not Included in Surveillance.Cause Not Conclusively Determined.Damper Visually & Functionally Inspected
page: https://kanterella.com/05000316/LER-2D1991-2D002-2D01-2C_-3Aon_910220-2Cdiscovered_That_Previous_Procedure_Rev_Omitted_Fire_Damper_from_Insp_List_-26_Damper_Not_Included_in_Surveillance.Cause_Not_Conc…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000316/LER-1991-002-01, :on 910220,discovered That Previous Procedure Rev Omitted Fire Damper from Insp List & Damper Not Included in Surveillance.Cause Not Conclusively Determined.Damper Visually & Functionally Inspected

LER-1989-001-01, :on 890116,erroneous Operation of Control Switch for Condenser Air Off Takes to Startup Air Ejectors Occurred.Caused by Inadequate self-checking.Switches Labeled & Operator Training Emphasis Made
type: Subject
label: 05000315/LER-1989-001-01, :on 890116,erroneous Operation of Control Switch for Condenser Air Off Takes to Startup Air Ejectors Occurred.Caused by Inadequate self-checking.Switches Labeled & Operator Training Emphasis Made
page: https://kanterella.com/05000315/LER-2D1989-2D001-2D01-2C_-3Aon_890116-2Cerroneous_Operation_of_Control_Switch_for_Condenser_Air_Off_Takes_to_Startup_Air_Ejectors_Occurred.Caused_by_Inadequate_self-2Dc…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000315/LER-1989-001-01, :on 890116,erroneous Operation of Control Switch for Condenser Air Off Takes to Startup Air Ejectors Occurred.Caused by Inadequate self-checking.Switches Labeled & Operator Training Emphasis Made

05000528/LER-1996-002-02, :on 960514,Tech Spec Violation Occurred Due to Erroneous Surveillance Requirement.Caused by Incorporation of C-E Generic Ts.Investigation Being Conducted
type: Subject
page: https://kanterella.com/05000528/LER-2D1996-2D002-2D02-2C_-3Aon_960514-2CTech_Spec_Violation_Occurred_Due_to_Erroneous_Surveillance_Requirement.Caused_by_Incorporation_of_C-2DE_Generic_Ts.Investigation…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000528/LER-1996-002-02, :on 960514,Tech Spec Violation Occurred Due to Erroneous Surveillance Requirement.Caused by Incorporation of C-E Generic Ts.Investigation Being Conducted

LER-1998-001, :on 980130,reactor Protection & ESFAS Instrumentation Not Bypassed within one-hour Allowed by TS Occurred.Caused by Inadequate Procedures.Expectation to Detect Alarm Conditions Was Emphasized to CR Personnel
type: Subject
label: 05000528/LER-1998-001, :on 980130,reactor Protection & ESFAS Instrumentation Not Bypassed within one-hour Allowed by TS Occurred.Caused by Inadequate Procedures.Expectation to Detect Alarm Conditions Was Emphasized to CR Personnel
page: https://kanterella.com/05000528/LER-2D1998-2D001-2C_-3Aon_980130-2Creactor_Protection_-26_ESFAS_Instrumentation_Not_Bypassed_within_one-2Dhour_Allowed_by_TS_Occurred.Caused_by_Inadequate_Procedures.Ex…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000528/LER-1998-001, :on 980130,reactor Protection & ESFAS Instrumentation Not Bypassed within one-hour Allowed by TS Occurred.Caused by Inadequate Procedures.Expectation to Detect Alarm Conditions Was Emphasized to CR Personnel

LER-1991-003, :on 910208,determined That Essential Spray Pond cross-connect Valves Not Verified in Correct Position. Caused by Failure to Meet TS Surveillance Requirements. Valve Positions Verified & Valves Locked Shut
type: Subject
label: 05000528/LER-1991-003, :on 910208,determined That Essential Spray Pond cross-connect Valves Not Verified in Correct Position. Caused by Failure to Meet TS Surveillance Requirements. Valve Positions Verified & Valves Locked Shut
page: https://kanterella.com/05000528/LER-2D1991-2D003-2C_-3Aon_910208-2Cdetermined_That_Essential_Spray_Pond_cross-2Dconnect_Valves_Not_Verified_in_Correct_Position._Caused_by_Failure_to_Meet_TS_Surveillan…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000528/LER-1991-003, :on 910208,determined That Essential Spray Pond cross-connect Valves Not Verified in Correct Position. Caused by Failure to Meet TS Surveillance Requirements. Valve Positions Verified & Valves Locked Shut

LER-1989-020, :on 890907,emergency Diesel Generator B, Essential Spray Pond Pump B & Essential Cooling Water Pump B Started During Removal of Jumpers.Caused by Personnel Error. Maint Procedure Revised
type: Subject
label: 05000528/LER-1989-020, :on 890907,emergency Diesel Generator B, Essential Spray Pond Pump B & Essential Cooling Water Pump B Started During Removal of Jumpers.Caused by Personnel Error. Maint Procedure Revised
page: https://kanterella.com/05000528/LER-2D1989-2D020-2C_-3Aon_890907-2Cemergency_Diesel_Generator_B-2C_Essential_Spray_Pond_Pump_B_-26_Essential_Cooling_Water_Pump_B_Started_During_Removal_of_Jumpers.Caus…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000528/LER-1989-020, :on 890907,emergency Diesel Generator B, Essential Spray Pond Pump B & Essential Cooling Water Pump B Started During Removal of Jumpers.Caused by Personnel Error. Maint Procedure Revised

LER-1989-004, :on 890104,exhaust Rocker Arm for Cylinder 8L Failed,Resulting in Emergency Diesel Generator Trip.Caused by Crack in Rocker Arm.On 890107,ESF Actuation Occurred.Also Reported Per Part 21.Rocker Arm Redesigned
type: Subject
label: 05000530/LER-1989-004, :on 890104,exhaust Rocker Arm for Cylinder 8L Failed,Resulting in Emergency Diesel Generator Trip.Caused by Crack in Rocker Arm.On 890107,ESF Actuation Occurred.Also Reported Per Part 21.Rocker Arm Redesigned
page: https://kanterella.com/05000530/LER-2D1989-2D004-2C_-3Aon_890104-2Cexhaust_Rocker_Arm_for_Cylinder_8L_Failed-2CResulting_in_Emergency_Diesel_Generator_Trip.Caused_by_Crack_in_Rocker_Arm.On_890107-2CES…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000530/LER-1989-004, :on 890104,exhaust Rocker Arm for Cylinder 8L Failed,Resulting in Emergency Diesel Generator Trip.Caused by Crack in Rocker Arm.On 890107,ESF Actuation Occurred.Also Reported Per Part 21.Rocker Arm Redesigned

LER-1989-001, :on 890303,electrical Grid Disturbance Resulted in Main Generator Output Breakers Opening,Resulting in Reactor Power Cutback & Steam Bypass Control Sys Actuation. Caused by Malfunction in Subj Control Sys
type: Subject
label: 05000530/LER-1989-001, :on 890303,electrical Grid Disturbance Resulted in Main Generator Output Breakers Opening,Resulting in Reactor Power Cutback & Steam Bypass Control Sys Actuation. Caused by Malfunction in Subj Control Sys
page: https://kanterella.com/05000530/LER-2D1989-2D001-2C_-3Aon_890303-2Celectrical_Grid_Disturbance_Resulted_in_Main_Generator_Output_Breakers_Opening-2CResulting_in_Reactor_Power_Cutback_-26_Steam_Bypass_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000530/LER-1989-001, :on 890303,electrical Grid Disturbance Resulted in Main Generator Output Breakers Opening,Resulting in Reactor Power Cutback & Steam Bypass Control Sys Actuation. Caused by Malfunction in Subj Control Sys

LER-1989-019, :on 890929,Train B of Fuel Bldg Essential Ventilation Actuation Sys Spuriously Actuated.Caused by Loose Connection Between Radiation Monitor Remote Indication & Control Unit Instrument Drawer & Cabinet
type: Subject
label: 05000528/LER-1989-019, :on 890929,Train B of Fuel Bldg Essential Ventilation Actuation Sys Spuriously Actuated.Caused by Loose Connection Between Radiation Monitor Remote Indication & Control Unit Instrument Drawer & Cabinet
page: https://kanterella.com/05000528/LER-2D1989-2D019-2C_-3Aon_890929-2CTrain_B_of_Fuel_Bldg_Essential_Ventilation_Actuation_Sys_Spuriously_Actuated.Caused_by_Loose_Connection_Between_Radiation_Monitor_Rem…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000528/LER-1989-019, :on 890929,Train B of Fuel Bldg Essential Ventilation Actuation Sys Spuriously Actuated.Caused by Loose Connection Between Radiation Monitor Remote Indication & Control Unit Instrument Drawer & Cabinet

LER-1989-013-01, :on 890926,control Room Operator Inadvertently Turned Wrong Handswitch During post-maint Testing Which Resulted in ESFAS Actuation.Caused by Personnel Error. Disciplinary Measures Taken
type: Subject
label: 05000530/LER-1989-013-01, :on 890926,control Room Operator Inadvertently Turned Wrong Handswitch During post-maint Testing Which Resulted in ESFAS Actuation.Caused by Personnel Error. Disciplinary Measures Taken
page: https://kanterella.com/05000530/LER-2D1989-2D013-2D01-2C_-3Aon_890926-2Ccontrol_Room_Operator_Inadvertently_Turned_Wrong_Handswitch_During_post-2Dmaint_Testing_Which_Resulted_in_ESFAS_Actuation.Caused…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000530/LER-1989-013-01, :on 890926,control Room Operator Inadvertently Turned Wrong Handswitch During post-maint Testing Which Resulted in ESFAS Actuation.Caused by Personnel Error. Disciplinary Measures Taken

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 355A
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-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 355A
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

LER-1990-001, :on 900220,radiation Monitor Indication Spike Resulted in ESF Actuation.Caused by Noise in Radiation Monitor Common Ground Circuit & Cognitive Personnel Error. Mod Performed to Circuit & Personnel Counseled
type: Subject
label: 05000528/LER-1990-001, :on 900220,radiation Monitor Indication Spike Resulted in ESF Actuation.Caused by Noise in Radiation Monitor Common Ground Circuit & Cognitive Personnel Error. Mod Performed to Circuit & Personnel Counseled
page: https://kanterella.com/05000528/LER-2D1990-2D001-2C_-3Aon_900220-2Cradiation_Monitor_Indication_Spike_Resulted_in_ESF_Actuation.Caused_by_Noise_in_Radiation_Monitor_Common_Ground_Circuit_-26_Cognitive…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000528/LER-1990-001, :on 900220,radiation Monitor Indication Spike Resulted in ESF Actuation.Caused by Noise in Radiation Monitor Common Ground Circuit & Cognitive Personnel Error. Mod Performed to Circuit & Personnel Counseled

LER-1991-001, :on 910110.determined That Postulated Break in Reactor Coolant Pump High Pressure Seal Cooler Could Result in RCS Leak Outside Containment.Caused by Tube Rupture in Seal Cooler.Rcs Activity Monitored
type: Subject
label: 05000528/LER-1991-001, :on 910110.determined That Postulated Break in Reactor Coolant Pump High Pressure Seal Cooler Could Result in RCS Leak Outside Containment.Caused by Tube Rupture in Seal Cooler.Rcs Activity Monitored
page: https://kanterella.com/05000528/LER-2D1991-2D001-2C_-3Aon_910110.determined_That_Postulated_Break_in_Reactor_Coolant_Pump_High_Pressure_Seal_Cooler_Could_Result_in_RCS_Leak_Outside_Containment.Caused_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000528/LER-1991-001, :on 910110.determined That Postulated Break in Reactor Coolant Pump High Pressure Seal Cooler Could Result in RCS Leak Outside Containment.Caused by Tube Rupture in Seal Cooler.Rcs Activity Monitored

LER-1990-002, :on 900222,locked High Radiation Area Gate Found Open & Unguarded.Caused by Personnel Error.Radiation Protection Personnel Verified Room Unoccupied & Secured Gate Per Approved Procedure
type: Subject
label: 05000530/LER-1990-002, :on 900222,locked High Radiation Area Gate Found Open & Unguarded.Caused by Personnel Error.Radiation Protection Personnel Verified Room Unoccupied & Secured Gate Per Approved Procedure
page: https://kanterella.com/05000530/LER-2D1990-2D002-2C_-3Aon_900222-2Clocked_High_Radiation_Area_Gate_Found_Open_-26_Unguarded.Caused_by_Personnel_Error.Radiation_Protection_Personnel_Verified_Room_Unocc…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000530/LER-1990-002, :on 900222,locked High Radiation Area Gate Found Open & Unguarded.Caused by Personnel Error.Radiation Protection Personnel Verified Room Unoccupied & Secured Gate Per Approved Procedure

LER-1990-001, :on 900127,spurious Train B Containment Purge Isolation Actuation Signal Initiated on Balance of Plant Esfas.Caused by Spiking of Radiation Monitor RU-38 Due to Malfunctioning Central Processing Unit
type: Subject
label: 05000530/LER-1990-001, :on 900127,spurious Train B Containment Purge Isolation Actuation Signal Initiated on Balance of Plant Esfas.Caused by Spiking of Radiation Monitor RU-38 Due to Malfunctioning Central Processing Unit
page: https://kanterella.com/05000530/LER-2D1990-2D001-2C_-3Aon_900127-2Cspurious_Train_B_Containment_Purge_Isolation_Actuation_Signal_Initiated_on_Balance_of_Plant_Esfas.Caused_by_Spiking_of_Radiation_Moni…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000530/LER-1990-001, :on 900127,spurious Train B Containment Purge Isolation Actuation Signal Initiated on Balance of Plant Esfas.Caused by Spiking of Radiation Monitor RU-38 Due to Malfunctioning Central Processing Unit

LER-1990-001-02, :on 900223,manual Reactor Trip Occurred During Planned Shutdown.Caused by Axial Shape Index Approaching Limit at End of Core Life Shutdown.Reactor Manually Tripped So That Channel Trip Setpoint Not Exceeded
type: Subject
label: 05000529/LER-1990-001-02, :on 900223,manual Reactor Trip Occurred During Planned Shutdown.Caused by Axial Shape Index Approaching Limit at End of Core Life Shutdown.Reactor Manually Tripped So That Channel Trip Setpoint Not Exceeded
page: https://kanterella.com/05000529/LER-2D1990-2D001-2D02-2C_-3Aon_900223-2Cmanual_Reactor_Trip_Occurred_During_Planned_Shutdown.Caused_by_Axial_Shape_Index_Approaching_Limit_at_End_of_Core_Life_Shutdown.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000529/LER-1990-001-02, :on 900223,manual Reactor Trip Occurred During Planned Shutdown.Caused by Axial Shape Index Approaching Limit at End of Core Life Shutdown.Reactor Manually Tripped So That Channel Trip Setpoint Not Exceeded

LER-1987-009-01, :on 870604,inadvertent Control Room Essential Filtration Actuation Occurred Due to Radiation Monitor Pump Cycling.Caused by Motor Drawing Too Much Current.Ground to Motor & Radiation Monitor Separated
type: Subject
label: 05000528/LER-1987-009-01, :on 870604,inadvertent Control Room Essential Filtration Actuation Occurred Due to Radiation Monitor Pump Cycling.Caused by Motor Drawing Too Much Current.Ground to Motor & Radiation Monitor Separated
page: https://kanterella.com/05000528/LER-2D1987-2D009-2D01-2C_-3Aon_870604-2Cinadvertent_Control_Room_Essential_Filtration_Actuation_Occurred_Due_to_Radiation_Monitor_Pump_Cycling.Caused_by_Motor_Drawing_T…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000528/LER-1987-009-01, :on 870604,inadvertent Control Room Essential Filtration Actuation Occurred Due to Radiation Monitor Pump Cycling.Caused by Motor Drawing Too Much Current.Ground to Motor & Radiation Monitor Separated

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 355A
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-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 355A
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

LER-1989-017, :on 891023,four Unsealed Penetrations in Unit 3 Seismic Gap Area Discovered During Visual Insp of 94 Ft Elevation Diesel Bldg Pipe Trenches.Fire Watches Established in All Units.Sealing of Penetrations Underway
type: Subject
label: 05000528/LER-1989-017, :on 891023,four Unsealed Penetrations in Unit 3 Seismic Gap Area Discovered During Visual Insp of 94 Ft Elevation Diesel Bldg Pipe Trenches.Fire Watches Established in All Units.Sealing of Penetrations Underway
page: https://kanterella.com/05000528/LER-2D1989-2D017-2C_-3Aon_891023-2Cfour_Unsealed_Penetrations_in_Unit_3_Seismic_Gap_Area_Discovered_During_Visual_Insp_of_94_Ft_Elevation_Diesel_Bldg_Pipe_Trenches.Fire…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000528/LER-1989-017, :on 891023,four Unsealed Penetrations in Unit 3 Seismic Gap Area Discovered During Visual Insp of 94 Ft Elevation Diesel Bldg Pipe Trenches.Fire Watches Established in All Units.Sealing of Penetrations Underway

LER-1994-004, :on 940307,two in-series Containment Isolation Valves MS-V-16 & MS-V-19 Inoperable Since 931217.Caused by Ambiguous Wording in Dec 1993 Operability Assessment. Procedures Modified & Training Provided
type: Subject
label: 05000397/LER-1994-004, :on 940307,two in-series Containment Isolation Valves MS-V-16 & MS-V-19 Inoperable Since 931217.Caused by Ambiguous Wording in Dec 1993 Operability Assessment. Procedures Modified & Training Provided
page: https://kanterella.com/05000397/LER-2D1994-2D004-2C_-3Aon_940307-2Ctwo_in-2Dseries_Containment_Isolation_Valves_MS-2DV-2D16_-26_MS-2DV-2D19_Inoperable_Since_931217.Caused_by_Ambiguous_Wording_in_Dec_1…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000397/LER-1994-004, :on 940307,two in-series Containment Isolation Valves MS-V-16 & MS-V-19 Inoperable Since 931217.Caused by Ambiguous Wording in Dec 1993 Operability Assessment. Procedures Modified & Training Provided

Tech Specs Identified as Part of Program of Surveillance Procedure Verification.Further Evaluation Performed.Quality Action Team to Be Chartered to Evaluate Program
type: Subject
label: 05000397/LER-1991-013, :on 910507,non-compliances W/Tech Specs Identified as Part of Program of Surveillance Procedure Verification.Further Evaluation Performed.Quality Action Team to Be Chartered to Evaluate Program
page: https://kanterella.com/05000397/LER-2D1991-2D013-2C_-3Aon_910507-2Cnon-2Dcompliances_W/Tech_Specs_Identified_as_Part_of_Program_of_Surveillance_Procedure_Verification.Further_Evaluation_Performed.Qual…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000397/LER-1991-013, :on 910507,non-compliances W/Tech Specs Identified as Part of Program of Surveillance Procedure Verification.Further Evaluation Performed.Quality Action Team to Be Chartered to Evaluate Program

LER-1990-022, :on 900930,pressure Decrease Occurred in Containment Instrument Air Sys When Nitrogen Cryogenic Tank Was Inadvertently Depleted.Containment Nitrogen Inerting Procedures PPM 2.3.1 & 2.3.7 Revised
type: Subject
label: 05000397/LER-1990-022, :on 900930,pressure Decrease Occurred in Containment Instrument Air Sys When Nitrogen Cryogenic Tank Was Inadvertently Depleted.Containment Nitrogen Inerting Procedures PPM 2.3.1 & 2.3.7 Revised
page: https://kanterella.com/05000397/LER-2D1990-2D022-2C_-3Aon_900930-2Cpressure_Decrease_Occurred_in_Containment_Instrument_Air_Sys_When_Nitrogen_Cryogenic_Tank_Was_Inadvertently_Depleted.Containment_Nitr…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000397/LER-1990-022, :on 900930,pressure Decrease Occurred in Containment Instrument Air Sys When Nitrogen Cryogenic Tank Was Inadvertently Depleted.Containment Nitrogen Inerting Procedures PPM 2.3.1 & 2.3.7 Revised

LER-1989-033, :on 890811,RWCU Isolation Occurred When Fuse in Power Supply to Leak Detection Monitor Blew,Giving False High Alarm Signal to Isolation Logic.Cause Unknown.Fuse Replaced & RWCU Sys Restored to Operation
type: Subject
label: 05000397/LER-1989-033, :on 890811,RWCU Isolation Occurred When Fuse in Power Supply to Leak Detection Monitor Blew,Giving False High Alarm Signal to Isolation Logic.Cause Unknown.Fuse Replaced & RWCU Sys Restored to Operation
page: https://kanterella.com/05000397/LER-2D1989-2D033-2C_-3Aon_890811-2CRWCU_Isolation_Occurred_When_Fuse_in_Power_Supply_to_Leak_Detection_Monitor_Blew-2CGiving_False_High_Alarm_Signal_to_Isolation_Logic.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000397/LER-1989-033, :on 890811,RWCU Isolation Occurred When Fuse in Power Supply to Leak Detection Monitor Blew,Giving False High Alarm Signal to Isolation Logic.Cause Unknown.Fuse Replaced & RWCU Sys Restored to Operation

LER-1989-036, :on 890905,discovered That Present Surveillance Procedures Do Not Provide for Independent Measurement of Two Values.Caused by Less than Adequate Surveillance Procedures on Response Time Testing of APRM Sys
type: Subject
label: 05000397/LER-1989-036, :on 890905,discovered That Present Surveillance Procedures Do Not Provide for Independent Measurement of Two Values.Caused by Less than Adequate Surveillance Procedures on Response Time Testing of APRM Sys
page: https://kanterella.com/05000397/LER-2D1989-2D036-2C_-3Aon_890905-2Cdiscovered_That_Present_Surveillance_Procedures_Do_Not_Provide_for_Independent_Measurement_of_Two_Values.Caused_by_Less_than_Adequate…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000397/LER-1989-036, :on 890905,discovered That Present Surveillance Procedures Do Not Provide for Independent Measurement of Two Values.Caused by Less than Adequate Surveillance Procedures on Response Time Testing of APRM Sys

05000397/LER-1990-026, :on 901024,inadequate Electrical Power Supply Separation Discovered in Two Control Room Panels Due to Design Error
type: Subject
page: https://kanterella.com/05000397/LER-2D1990-2D026-2C_-3Aon_901024-2Cinadequate_Electrical_Power_Supply_Separation_Discovered_in_Two_Control_Room_Panels_Due_to_Design_Error
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000397/LER-1990-026, :on 901024,inadequate Electrical Power Supply Separation Discovered in Two Control Room Panels Due to Design Error

LER-1989-020, :on 890527 & 0605,during Local Leak Rate Testing,Valve RHR-V-9 Automatically Isolated.Caused by Procedural Inadequacy & Inadequate Corrective Action Following Second Event.Procedure Modified
type: Subject
label: 05000397/LER-1989-020, :on 890527 & 0605,during Local Leak Rate Testing,Valve RHR-V-9 Automatically Isolated.Caused by Procedural Inadequacy & Inadequate Corrective Action Following Second Event.Procedure Modified
page: https://kanterella.com/05000397/LER-2D1989-2D020-2C_-3Aon_890527_-26_0605-2Cduring_Local_Leak_Rate_Testing-2CValve_RHR-2DV-2D9_Automatically_Isolated.Caused_by_Procedural_Inadequacy_-26_Inadequate_Cor…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000397/LER-1989-020, :on 890527 & 0605,during Local Leak Rate Testing,Valve RHR-V-9 Automatically Isolated.Caused by Procedural Inadequacy & Inadequate Corrective Action Following Second Event.Procedure Modified

05000397/LER-1989-005, :on 890311,34 of 185 Control Rods Drifted Inward from One to Seven Notches.Caused by Main Steam Line Radiation Monitor Design Deficiency.Desired Rod Pattern Reestablished
type: Subject
page: https://kanterella.com/05000397/LER-2D1989-2D005-2C_-3Aon_890311-2C34_of_185_Control_Rods_Drifted_Inward_from_One_to_Seven_Notches.Caused_by_Main_Steam_Line_Radiation_Monitor_Design_Deficiency.Desired…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000397/LER-1989-005, :on 890311,34 of 185 Control Rods Drifted Inward from One to Seven Notches.Caused by Main Steam Line Radiation Monitor Design Deficiency.Desired Rod Pattern Reestablished

05000397/LER-1988-023, :on 880629,Tech Spec Violation of Secondary Containment to Outside Differential Pressure Occurred.Caused by Sys Configuration Error.Instrument Setpoint Change Request Initiated
type: Subject
page: https://kanterella.com/05000397/LER-2D1988-2D023-2C_-3Aon_880629-2CTech_Spec_Violation_of_Secondary_Containment_to_Outside_Differential_Pressure_Occurred.Caused_by_Sys_Configuration_Error.Instrument_S…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000397/LER-1988-023, :on 880629,Tech Spec Violation of Secondary Containment to Outside Differential Pressure Occurred.Caused by Sys Configuration Error.Instrument Setpoint Change Request Initiated

Potential Defective Switches.Caused by Design Problem.Investigation & Evaluation of Switch Problems Immediately Initiated.Part 21 Related
type: Subject
label: 05000397/LER-1988-017, :on 880615,problems W/Limitorque Models SMB-000 & SMB-00 Discovered W/Potential Defective Switches.Caused by Design Problem.Investigation & Evaluation of Switch Problems Immediately Initiated.Part 21 Related
page: https://kanterella.com/05000397/LER-2D1988-2D017-2C_-3Aon_880615-2Cproblems_W/Limitorque_Models_SMB-2D000_-26_SMB-2D00_Discovered_W/Potential_Defective_Switches.Caused_by_Design_Problem.Investigation_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000397/LER-1988-017, :on 880615,problems W/Limitorque Models SMB-000 & SMB-00 Discovered W/Potential Defective Switches.Caused by Design Problem.Investigation & Evaluation of Switch Problems Immediately Initiated.Part 21 Related

LER-1989-015, :on 890512,three-quarter-inch High Point Vent Line Failed During Performance of HPCS Sys Operability Procedure.Caused by Reverse Bending Fatigue Caused by Vibration.Design Change Implemented
type: Subject
label: 05000397/LER-1989-015, :on 890512,three-quarter-inch High Point Vent Line Failed During Performance of HPCS Sys Operability Procedure.Caused by Reverse Bending Fatigue Caused by Vibration.Design Change Implemented
page: https://kanterella.com/05000397/LER-2D1989-2D015-2C_-3Aon_890512-2Cthree-2Dquarter-2Dinch_High_Point_Vent_Line_Failed_During_Performance_of_HPCS_Sys_Operability_Procedure.Caused_by_Reverse_Bending_Fat…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000397/LER-1989-015, :on 890512,three-quarter-inch High Point Vent Line Failed During Performance of HPCS Sys Operability Procedure.Caused by Reverse Bending Fatigue Caused by Vibration.Design Change Implemented

LER-1987-018, :on 870626,reactor Automatically Scrammed by Reactor Protection Sys Actuation Due to Normal Auxiliary Power Transformer Sudden Pressure Relay Actuation.Caused by Opening of Test Valve.Transformers Inspected
type: Subject
label: 05000397/LER-1987-018, :on 870626,reactor Automatically Scrammed by Reactor Protection Sys Actuation Due to Normal Auxiliary Power Transformer Sudden Pressure Relay Actuation.Caused by Opening of Test Valve.Transformers Inspected
page: https://kanterella.com/05000397/LER-2D1987-2D018-2C_-3Aon_870626-2Creactor_Automatically_Scrammed_by_Reactor_Protection_Sys_Actuation_Due_to_Normal_Auxiliary_Power_Transformer_Sudden_Pressure_Relay_Ac…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000397/LER-1987-018, :on 870626,reactor Automatically Scrammed by Reactor Protection Sys Actuation Due to Normal Auxiliary Power Transformer Sudden Pressure Relay Actuation.Caused by Opening of Test Valve.Transformers Inspected

LER-1987-005, :on 870421,reactor Containment Inboard RHR Shutdown Cooling Supply Valve Automatically Isolated.Caused by Personnel Error.Lifted Neutral Lead Replaced.Relay RHR-V-9 Reopened & Plant Engineer Counseled
type: Subject
label: 05000397/LER-1987-005, :on 870421,reactor Containment Inboard RHR Shutdown Cooling Supply Valve Automatically Isolated.Caused by Personnel Error.Lifted Neutral Lead Replaced.Relay RHR-V-9 Reopened & Plant Engineer Counseled
page: https://kanterella.com/05000397/LER-2D1987-2D005-2C_-3Aon_870421-2Creactor_Containment_Inboard_RHR_Shutdown_Cooling_Supply_Valve_Automatically_Isolated.Caused_by_Personnel_Error.Lifted_Neutral_Lead_Re…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000397/LER-1987-005, :on 870421,reactor Containment Inboard RHR Shutdown Cooling Supply Valve Automatically Isolated.Caused by Personnel Error.Lifted Neutral Lead Replaced.Relay RHR-V-9 Reopened & Plant Engineer Counseled

LER-1999-009, :on 990503,instrumentation Declared Inoperable in Multiple Channels Resulted in Condition Prohibited by Ts. Caused by Unanticipated High Frequency AC Voltage Ripple. Entered TS LCO 3.0.3.With
type: Subject
label: 05000244/LER-1999-009, :on 990503,instrumentation Declared Inoperable in Multiple Channels Resulted in Condition Prohibited by Ts. Caused by Unanticipated High Frequency AC Voltage Ripple. Entered TS LCO 3.0.3.With
page: https://kanterella.com/05000244/LER-2D1999-2D009-2C_-3Aon_990503-2Cinstrumentation_Declared_Inoperable_in_Multiple_Channels_Resulted_in_Condition_Prohibited_by_Ts._Caused_by_Unanticipated_High_Frequen…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000244/LER-1999-009, :on 990503,instrumentation Declared Inoperable in Multiple Channels Resulted in Condition Prohibited by Ts. Caused by Unanticipated High Frequency AC Voltage Ripple. Entered TS LCO 3.0.3.With

05000244/LER-1992-005, :on 920420,determined That 242 Tubes in a SG & 216 Tubes in B SG Required Corrective Action Due to Tube Degradation.Affected Tubes Either Sleeved or Plugged.W/
type: Subject
page: https://kanterella.com/05000244/LER-2D1992-2D005-2C_-3Aon_920420-2Cdetermined_That_242_Tubes_in_a_SG_-26_216_Tubes_in_B_SG_Required_Corrective_Action_Due_to_Tube_Degradation.Affected_Tubes_Either_Slee…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000244/LER-1992-005, :on 920420,determined That 242 Tubes in a SG & 216 Tubes in B SG Required Corrective Action Due to Tube Degradation.Affected Tubes Either Sleeved or Plugged.W/

LER-1991-009, :on 910624,RWCU Steam Leak Detection Instrumentation Discovered to Be Inadvertently Actuated During Routine Functional Testing.Caused by Adequate Verbal Communication.Technicians Briefed
type: Subject
label: 05000388/LER-1991-009, :on 910624,RWCU Steam Leak Detection Instrumentation Discovered to Be Inadvertently Actuated During Routine Functional Testing.Caused by Adequate Verbal Communication.Technicians Briefed
page: https://kanterella.com/05000388/LER-2D1991-2D009-2C_-3Aon_910624-2CRWCU_Steam_Leak_Detection_Instrumentation_Discovered_to_Be_Inadvertently_Actuated_During_Routine_Functional_Testing.Caused_by_Adequat…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000388/LER-1991-009, :on 910624,RWCU Steam Leak Detection Instrumentation Discovered to Be Inadvertently Actuated During Routine Functional Testing.Caused by Adequate Verbal Communication.Technicians Briefed

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 355A
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

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 355A
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

Energized ESFAS
type: Subject
label: 05000335/LER-1987-006-02, :on 870322,spurious Main Steam Isolation Occurred When Energized Wires Inadvertently Allowed to Make Contact W/Metal Cabinet.Caused by Personnel Error.Personnel Instructed on Working W/Energized ESFAS
page: https://kanterella.com/05000335/LER-2D1987-2D006-2D02-2C_-3Aon_870322-2Cspurious_Main_Steam_Isolation_Occurred_When_Energized_Wires_Inadvertently_Allowed_to_Make_Contact_W/Metal_Cabinet.Caused_by_Pers…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000335/LER-1987-006-02, :on 870322,spurious Main Steam Isolation Occurred When Energized Wires Inadvertently Allowed to Make Contact W/Metal Cabinet.Caused by Personnel Error.Personnel Instructed on Working W/Energized ESFAS

LER-1987-009-01, :on 870412,ECCS Emergency Exhaust Fan Radiation Monitor Failed Resulting in Inoperability of Fuel Handling Bldg Exhaust Stack Radiation Monitor.Caused by Equipment & Personnel Error.Monitors Restored to Svc
type: Subject
label: 05000335/LER-1987-009-01, :on 870412,ECCS Emergency Exhaust Fan Radiation Monitor Failed Resulting in Inoperability of Fuel Handling Bldg Exhaust Stack Radiation Monitor.Caused by Equipment & Personnel Error.Monitors Restored to Svc
page: https://kanterella.com/05000335/LER-2D1987-2D009-2D01-2C_-3Aon_870412-2CECCS_Emergency_Exhaust_Fan_Radiation_Monitor_Failed_Resulting_in_Inoperability_of_Fuel_Handling_Bldg_Exhaust_Stack_Radiation_Mon…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000335/LER-1987-009-01, :on 870412,ECCS Emergency Exhaust Fan Radiation Monitor Failed Resulting in Inoperability of Fuel Handling Bldg Exhaust Stack Radiation Monitor.Caused by Equipment & Personnel Error.Monitors Restored to Svc

LER-1987-005-03, :on 870527,while Operating in Mode 1,control Element Assemblies 5 & 7 Simultaneously Dropped to Bottom of of Core.Possibly Caused by Random Intermittent Failure of Control Element Drive Mechanism Component
type: Subject
label: 05000389/LER-1987-005-03, :on 870527,while Operating in Mode 1,control Element Assemblies 5 & 7 Simultaneously Dropped to Bottom of of Core.Possibly Caused by Random Intermittent Failure of Control Element Drive Mechanism Component
page: https://kanterella.com/05000389/LER-2D1987-2D005-2D03-2C_-3Aon_870527-2Cwhile_Operating_in_Mode_1-2Ccontrol_Element_Assemblies_5_-26_7_Simultaneously_Dropped_to_Bottom_of_of_Core.Possibly_Caused_by_Ra…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000389/LER-1987-005-03, :on 870527,while Operating in Mode 1,control Element Assemblies 5 & 7 Simultaneously Dropped to Bottom of of Core.Possibly Caused by Random Intermittent Failure of Control Element Drive Mechanism Component

05000458/LER-2014-003-01, Regarding Operations Prohibited by Technical Specifications Due to Concurrent Inoperability of Reactor Protection System Channels
type: Subject
page: https://kanterella.com/05000458/LER-2D2014-2D003-2D01-2C_Regarding_Operations_Prohibited_by_Technical_Specifications_Due_to_Concurrent_Inoperability_of_Reactor_Protection_System_Channels
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000458/LER-2014-003-01, Regarding Operations Prohibited by Technical Specifications Due to Concurrent Inoperability of Reactor Protection System Channels

05000321/LER-2009-006, Regarding Main Control Room Air Conditioner Inoperable Due to Inoperable Solenid Valve
type: Subject
page: https://kanterella.com/05000321/LER-2D2009-2D006-2C_Regarding_Main_Control_Room_Air_Conditioner_Inoperable_Due_to_Inoperable_Solenid_Valve
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000321/LER-2009-006, Regarding Main Control Room Air Conditioner Inoperable Due to Inoperable Solenid Valve

05000454/LER-2007-002, Technical Specification Required Shutdown of Unit 1 and Unit 2 Due to an Ultimate Heat Sink Pipe Leak Common to Both Units
type: Subject
page: https://kanterella.com/05000454/LER-2D2007-2D002-2C_Technical_Specification_Required_Shutdown_of_Unit_1_and_Unit_2_Due_to_an_Ultimate_Heat_Sink_Pipe_Leak_Common_to_Both_Units
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000454/LER-2007-002, Technical Specification Required Shutdown of Unit 1 and Unit 2 Due to an Ultimate Heat Sink Pipe Leak Common to Both Units

LER-1992-012-02, :on 920802,one of Three Secondary Relays Failed to Actuate,Causing TS 3.0.3 to Be Entered.Caused by Failure of under-voltage Relay to Actuate.Procedure Will Be Revised to Provide Guidance for Tripped Condition
type: Subject
label: 05000400/LER-1992-012-02, :on 920802,one of Three Secondary Relays Failed to Actuate,Causing TS 3.0.3 to Be Entered.Caused by Failure of under-voltage Relay to Actuate.Procedure Will Be Revised to Provide Guidance for Tripped Condition
page: https://kanterella.com/05000400/LER-2D1992-2D012-2D02-2C_-3Aon_920802-2Cone_of_Three_Secondary_Relays_Failed_to_Actuate-2CCausing_TS_3.0.3_to_Be_Entered.Caused_by_Failure_of_under-2Dvoltage_Relay_to_A…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 355A
wiki page sort key: 05000400/LER-1992-012-02, :on 920802,one of Three Secondary Relays Failed to Actuate,Causing TS 3.0.3 to Be Entered.Caused by Failure of under-voltage Relay to Actuate.Procedure Will Be Revised to Provide Guidance for Tripped Condition

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