NRC Form 304A
type: Ontology
creation date: 2025-12-07T15:47:35-05:00
imports: http://semantic-mediawiki.org/swivt/1.0

NRC Form 304A
type: Subject
page: https://kanterella.com/NRC_Form_304A
wiki namespace: 0
wiki page content language: en
wiki page sort key: NRC Form 304A

LER-1989-012-02, :on 890505,fault in Isolated Phase Bus Duct on Secondary Side of Main Transformer 1A Occurred.Caused by Lack of Administrative Control on Operation of Bus Duct Cooling Sys.Standoff Insulators Replaced
type: Subject
label: 05000259/LER-1989-012-02, :on 890505,fault in Isolated Phase Bus Duct on Secondary Side of Main Transformer 1A Occurred.Caused by Lack of Administrative Control on Operation of Bus Duct Cooling Sys.Standoff Insulators Replaced
page: https://kanterella.com/05000259/LER-2D1989-2D012-2D02-2C_-3Aon_890505-2Cfault_in_Isolated_Phase_Bus_Duct_on_Secondary_Side_of_Main_Transformer_1A_Occurred.Caused_by_Lack_of_Administrative_Control_on_O…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000259/LER-1989-012-02, :on 890505,fault in Isolated Phase Bus Duct on Secondary Side of Main Transformer 1A Occurred.Caused by Lack of Administrative Control on Operation of Bus Duct Cooling Sys.Standoff Insulators Replaced

LER-1988-030, :Since 881110,number of Discrepancies Have Been Identified in fire-rated Assemblies at Plant.Cause of Events Appears to Be Inadequate Fire Seal Installation & Insp Program During Initial Plant Const
type: Subject
label: 05000382/LER-1988-030, :Since 881110,number of Discrepancies Have Been Identified in fire-rated Assemblies at Plant.Cause of Events Appears to Be Inadequate Fire Seal Installation & Insp Program During Initial Plant Const
page: https://kanterella.com/05000382/LER-2D1988-2D030-2C_-3ASince_881110-2Cnumber_of_Discrepancies_Have_Been_Identified_in_fire-2Drated_Assemblies_at_Plant.Cause_of_Events_Appears_to_Be_Inadequate_Fire_Sea…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000382/LER-1988-030, :Since 881110,number of Discrepancies Have Been Identified in fire-rated Assemblies at Plant.Cause of Events Appears to Be Inadequate Fire Seal Installation & Insp Program During Initial Plant Const

LER-1989-019-01, :on 890821,inadvertent ESF Actuation Occurred Due to Inappropriate Action & Defective Procedure.Procedure Changes Completed for Train a & Train B Diesel Sequencer Timer Calibr Procedures
type: Subject
label: 05000369/LER-1989-019-01, :on 890821,inadvertent ESF Actuation Occurred Due to Inappropriate Action & Defective Procedure.Procedure Changes Completed for Train a & Train B Diesel Sequencer Timer Calibr Procedures
page: https://kanterella.com/05000369/LER-2D1989-2D019-2D01-2C_-3Aon_890821-2Cinadvertent_ESF_Actuation_Occurred_Due_to_Inappropriate_Action_-26_Defective_Procedure.Procedure_Changes_Completed_for_Train_a_-…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000369/LER-1989-019-01, :on 890821,inadvertent ESF Actuation Occurred Due to Inappropriate Action & Defective Procedure.Procedure Changes Completed for Train a & Train B Diesel Sequencer Timer Calibr Procedures

LER-1989-011, :on 890418,hourly Fire Watch Patrol at Door 1025-2 Not Performed & Penetration Seal Not Restored to Operable Status within 7 Days.Caused by Use of Uncontrolled Working List.Security Bulletin Issued
type: Subject
label: 05000285/LER-1989-011, :on 890418,hourly Fire Watch Patrol at Door 1025-2 Not Performed & Penetration Seal Not Restored to Operable Status within 7 Days.Caused by Use of Uncontrolled Working List.Security Bulletin Issued
page: https://kanterella.com/05000285/LER-2D1989-2D011-2C_-3Aon_890418-2Chourly_Fire_Watch_Patrol_at_Door_1025-2D2_Not_Performed_-26_Penetration_Seal_Not_Restored_to_Operable_Status_within_7_Days.Caused_by_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000285/LER-1989-011, :on 890418,hourly Fire Watch Patrol at Door 1025-2 Not Performed & Penetration Seal Not Restored to Operable Status within 7 Days.Caused by Use of Uncontrolled Working List.Security Bulletin Issued

LER-1989-025, :on 890815,all Four Emergency Diesel Generators Declared Inoperable Because Fuel Oil Not Sampled.Caused by Inadequate Procedure Due to Chemistry Personnel Omission. Samples Obtained & Analyzed
type: Subject
label: 05000327/LER-1989-025, :on 890815,all Four Emergency Diesel Generators Declared Inoperable Because Fuel Oil Not Sampled.Caused by Inadequate Procedure Due to Chemistry Personnel Omission. Samples Obtained & Analyzed
page: https://kanterella.com/05000327/LER-2D1989-2D025-2C_-3Aon_890815-2Call_Four_Emergency_Diesel_Generators_Declared_Inoperable_Because_Fuel_Oil_Not_Sampled.Caused_by_Inadequate_Procedure_Due_to_Chemistry…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000327/LER-1989-025, :on 890815,all Four Emergency Diesel Generators Declared Inoperable Because Fuel Oil Not Sampled.Caused by Inadequate Procedure Due to Chemistry Personnel Omission. Samples Obtained & Analyzed

Low Steam Generator Level.Caused by Closure of Regulating Valve
type: Subject
label: 05000338/LER-1989-005-01, :on 890225,unit Tripped from 76% Power When Initiating Signal for Reactor Trip Was Greater than Feedwater Flow Mismatch Coincident W/Low Steam Generator Level.Caused by Closure of Regulating Valve
page: https://kanterella.com/05000338/LER-2D1989-2D005-2D01-2C_-3Aon_890225-2Cunit_Tripped_from_76-_Power_When_Initiating_Signal_for_Reactor_Trip_Was_Greater_than_Feedwater_Flow_Mismatch_Coincident_W/Low_St…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000338/LER-1989-005-01, :on 890225,unit Tripped from 76% Power When Initiating Signal for Reactor Trip Was Greater than Feedwater Flow Mismatch Coincident W/Low Steam Generator Level.Caused by Closure of Regulating Valve

LER-1988-036, :on 881118,third Test on Vg Header a Did Not Conclude Past Operability Because Blackout Header Loads During Blackout Conditions Are Unknown.Caused by Design Deficiency.Vg Sys Will Be Upgraded
type: Subject
label: 05000369/LER-1988-036, :on 881118,third Test on Vg Header a Did Not Conclude Past Operability Because Blackout Header Loads During Blackout Conditions Are Unknown.Caused by Design Deficiency.Vg Sys Will Be Upgraded
page: https://kanterella.com/05000369/LER-2D1988-2D036-2C_-3Aon_881118-2Cthird_Test_on_Vg_Header_a_Did_Not_Conclude_Past_Operability_Because_Blackout_Header_Loads_During_Blackout_Conditions_Are_Unknown.Caus…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000369/LER-1988-036, :on 881118,third Test on Vg Header a Did Not Conclude Past Operability Because Blackout Header Loads During Blackout Conditions Are Unknown.Caused by Design Deficiency.Vg Sys Will Be Upgraded

Generator Output.Caused by Personnel Standing on Breaker Cabinet. Scaffold Const Procedure Revised
type: Subject
label: 05000260/LER-1989-006-01, :on 890331,unplanned ESF Actuations Occurred Due to Loss of Reactor Protection Sys Motor/Generator Output.Caused by Personnel Standing on Breaker Cabinet. Scaffold Const Procedure Revised
page: https://kanterella.com/05000260/LER-2D1989-2D006-2D01-2C_-3Aon_890331-2Cunplanned_ESF_Actuations_Occurred_Due_to_Loss_of_Reactor_Protection_Sys_Motor/Generator_Output.Caused_by_Personnel_Standing_on_B…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000260/LER-1989-006-01, :on 890331,unplanned ESF Actuations Occurred Due to Loss of Reactor Protection Sys Motor/Generator Output.Caused by Personnel Standing on Breaker Cabinet. Scaffold Const Procedure Revised

05000298/LER-1989-012, :on 890407,actuation of ESF Group Isolations Occurred Subsequent to Planned Manual Scram.Caused by design.State-of-the-art Digital Turbine Control Sys Being Installed
type: Subject
page: https://kanterella.com/05000298/LER-2D1989-2D012-2C_-3Aon_890407-2Cactuation_of_ESF_Group_Isolations_Occurred_Subsequent_to_Planned_Manual_Scram.Caused_by_design.State-2Dof-2Dthe-2Dart_Digital_Turbine…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000298/LER-1989-012, :on 890407,actuation of ESF Group Isolations Occurred Subsequent to Planned Manual Scram.Caused by design.State-of-the-art Digital Turbine Control Sys Being Installed

LER-1988-022, :on 881013,determined That Various Pipes in Safety Injection Sys & Chemical Vol & Control Sys Collected or Trapped Gas Which Might Affect Functions of Sys.Caused by Not Completely Venting Sys After Refill
type: Subject
label: 05000338/LER-1988-022, :on 881013,determined That Various Pipes in Safety Injection Sys & Chemical Vol & Control Sys Collected or Trapped Gas Which Might Affect Functions of Sys.Caused by Not Completely Venting Sys After Refill
page: https://kanterella.com/05000338/LER-2D1988-2D022-2C_-3Aon_881013-2Cdetermined_That_Various_Pipes_in_Safety_Injection_Sys_-26_Chemical_Vol_-26_Control_Sys_Collected_or_Trapped_Gas_Which_Might_Affect_Fu…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000338/LER-1988-022, :on 881013,determined That Various Pipes in Safety Injection Sys & Chemical Vol & Control Sys Collected or Trapped Gas Which Might Affect Functions of Sys.Caused by Not Completely Venting Sys After Refill

LER-1989-007-01, :on 890518,electrical Supply Breaker to ATWS Mitigating Sys Actuation Circuitry Panel Accidentally Opened.Caused by Design Deficiency.Deficiency Corrected by Modifying Process Instrumentation Circuitry
type: Subject
label: 05000334/LER-1989-007-01, :on 890518,electrical Supply Breaker to ATWS Mitigating Sys Actuation Circuitry Panel Accidentally Opened.Caused by Design Deficiency.Deficiency Corrected by Modifying Process Instrumentation Circuitry
page: https://kanterella.com/05000334/LER-2D1989-2D007-2D01-2C_-3Aon_890518-2Celectrical_Supply_Breaker_to_ATWS_Mitigating_Sys_Actuation_Circuitry_Panel_Accidentally_Opened.Caused_by_Design_Deficiency.Defic…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000334/LER-1989-007-01, :on 890518,electrical Supply Breaker to ATWS Mitigating Sys Actuation Circuitry Panel Accidentally Opened.Caused by Design Deficiency.Deficiency Corrected by Modifying Process Instrumentation Circuitry

LER-1988-041, :on 881209,discovered That as-installed Instrument Cabinets Supplied by Bailey Meter Co Did Not Meet Seismic Qualification Requirements.Caused by Lack of Two Restraint Bars on Vendor Drawings
type: Subject
label: 05000328/LER-1988-041, :on 881209,discovered That as-installed Instrument Cabinets Supplied by Bailey Meter Co Did Not Meet Seismic Qualification Requirements.Caused by Lack of Two Restraint Bars on Vendor Drawings
page: https://kanterella.com/05000328/LER-2D1988-2D041-2C_-3Aon_881209-2Cdiscovered_That_as-2Dinstalled_Instrument_Cabinets_Supplied_by_Bailey_Meter_Co_Did_Not_Meet_Seismic_Qualification_Requirements.Caused…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000328/LER-1988-041, :on 881209,discovered That as-installed Instrument Cabinets Supplied by Bailey Meter Co Did Not Meet Seismic Qualification Requirements.Caused by Lack of Two Restraint Bars on Vendor Drawings

LER-1989-003, :on 890319,operators Caused Inadvertent Actuation of ESF by Not Following Procedure step-by-step When Reinstating Block signal.INPO-assisted Formal Human Performance Evaluation Performed
type: Subject
label: 05000317/LER-1989-003, :on 890319,operators Caused Inadvertent Actuation of ESF by Not Following Procedure step-by-step When Reinstating Block signal.INPO-assisted Formal Human Performance Evaluation Performed
page: https://kanterella.com/05000317/LER-2D1989-2D003-2C_-3Aon_890319-2Coperators_Caused_Inadvertent_Actuation_of_ESF_by_Not_Following_Procedure_step-2Dby-2Dstep_When_Reinstating_Block_signal.INPO-2Dassist…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000317/LER-1989-003, :on 890319,operators Caused Inadvertent Actuation of ESF by Not Following Procedure step-by-step When Reinstating Block signal.INPO-assisted Formal Human Performance Evaluation Performed

LER-1987-031, :on 870720,high Vibration Signal Caused Turbine Control Valve Fast Closure & Reactor Scram Resulted.Caused by Erroneous High Vibration Signal from Faulty Shaft Rider Sensor Connection.Design Change Being Prepared
type: Subject
label: 05000341/LER-1987-031, :on 870720,high Vibration Signal Caused Turbine Control Valve Fast Closure & Reactor Scram Resulted.Caused by Erroneous High Vibration Signal from Faulty Shaft Rider Sensor Connection.Design Change Being Prepared
page: https://kanterella.com/05000341/LER-2D1987-2D031-2C_-3Aon_870720-2Chigh_Vibration_Signal_Caused_Turbine_Control_Valve_Fast_Closure_-26_Reactor_Scram_Resulted.Caused_by_Erroneous_High_Vibration_Signal_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000341/LER-1987-031, :on 870720,high Vibration Signal Caused Turbine Control Valve Fast Closure & Reactor Scram Resulted.Caused by Erroneous High Vibration Signal from Faulty Shaft Rider Sensor Connection.Design Change Being Prepared

Secondary Containment Integrity Due to Use of non-Q Air Supply Noted, Following Test Failure.Caused by Wind Conditions Impacting Test Results.Foam Seal Installed within 4 H
type: Subject
label: 05000341/LER-1989-005, :on 890208,potential Concerns W/Secondary Containment Integrity Due to Use of non-Q Air Supply Noted, Following Test Failure.Caused by Wind Conditions Impacting Test Results.Foam Seal Installed within 4 H
page: https://kanterella.com/05000341/LER-2D1989-2D005-2C_-3Aon_890208-2Cpotential_Concerns_W/Secondary_Containment_Integrity_Due_to_Use_of_non-2DQ_Air_Supply_Noted-2C_Following_Test_Failure.Caused_by_Wind_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000341/LER-1989-005, :on 890208,potential Concerns W/Secondary Containment Integrity Due to Use of non-Q Air Supply Noted, Following Test Failure.Caused by Wind Conditions Impacting Test Results.Foam Seal Installed within 4 H

Supply Breakers
type: Subject
label: 05000301/LER-1989-001, :on 890203,operator Dicovered Both Supply Breakers in Open Position Due to Simultaneous Automatic Turbine Runback.Cause Not Positively Identified.Efforts Will Be Made to Ease Difficulty W/Supply Breakers
page: https://kanterella.com/05000301/LER-2D1989-2D001-2C_-3Aon_890203-2Coperator_Dicovered_Both_Supply_Breakers_in_Open_Position_Due_to_Simultaneous_Automatic_Turbine_Runback.Cause_Not_Positively_Identifie…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000301/LER-1989-001, :on 890203,operator Dicovered Both Supply Breakers in Open Position Due to Simultaneous Automatic Turbine Runback.Cause Not Positively Identified.Efforts Will Be Made to Ease Difficulty W/Supply Breakers

LER-1987-001, :on 870105,inadvertent Radioactive Gas Release Occurred Causing Auxiliary Bldg Ventilation Sys to Swap from Bypass to Filter Mode.Caused by Failure of Waste Gas Sys Drain Trap T-04
type: Subject
label: 05000413/LER-1987-001, :on 870105,inadvertent Radioactive Gas Release Occurred Causing Auxiliary Bldg Ventilation Sys to Swap from Bypass to Filter Mode.Caused by Failure of Waste Gas Sys Drain Trap T-04
page: https://kanterella.com/05000413/LER-2D1987-2D001-2C_-3Aon_870105-2Cinadvertent_Radioactive_Gas_Release_Occurred_Causing_Auxiliary_Bldg_Ventilation_Sys_to_Swap_from_Bypass_to_Filter_Mode.Caused_by_Fail…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000413/LER-1987-001, :on 870105,inadvertent Radioactive Gas Release Occurred Causing Auxiliary Bldg Ventilation Sys to Swap from Bypass to Filter Mode.Caused by Failure of Waste Gas Sys Drain Trap T-04

LER-1987-006-01, :on 870612 & 22,main Control Room Environ Control (Mcrec EIIS Code VI) Sys Went Into Pressurization Mode of Operation on Receipt of High Radiation Field Trip Signal.Caused by Irradiated Outage Equipment
type: Subject
label: 05000321/LER-1987-006-01, :on 870612 & 22,main Control Room Environ Control (Mcrec EIIS Code VI) Sys Went Into Pressurization Mode of Operation on Receipt of High Radiation Field Trip Signal.Caused by Irradiated Outage Equipment
page: https://kanterella.com/05000321/LER-2D1987-2D006-2D01-2C_-3Aon_870612_-26_22-2Cmain_Control_Room_Environ_Control_-28Mcrec_EIIS_Code_VI-29_Sys_Went_Into_Pressurization_Mode_of_Operation_on_Receipt_of_H…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000321/LER-1987-006-01, :on 870612 & 22,main Control Room Environ Control (Mcrec EIIS Code VI) Sys Went Into Pressurization Mode of Operation on Receipt of High Radiation Field Trip Signal.Caused by Irradiated Outage Equipment

LER-1988-032-01, :on 880914,discrepancies Discovered in Electrical Cable Classifications & Cable Routings Indicates Violation of Requirements.Caused by Inadequate Design Control.Design Program Improved Significantly
type: Subject
label: 05000259/LER-1988-032-01, :on 880914,discrepancies Discovered in Electrical Cable Classifications & Cable Routings Indicates Violation of Requirements.Caused by Inadequate Design Control.Design Program Improved Significantly
page: https://kanterella.com/05000259/LER-2D1988-2D032-2D01-2C_-3Aon_880914-2Cdiscrepancies_Discovered_in_Electrical_Cable_Classifications_-26_Cable_Routings_Indicates_Violation_of_Requirements.Caused_by_In…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000259/LER-1988-032-01, :on 880914,discrepancies Discovered in Electrical Cable Classifications & Cable Routings Indicates Violation of Requirements.Caused by Inadequate Design Control.Design Program Improved Significantly

LER-1987-015-01, :on 870827 & 28,main Control Room Environ Control Sys Actuated on Signal from Refueling Floor Area Radiation Monitor,Resulting in 870827 Pressurization.Caused by Faulty Gm Tube.Tube Replaced
type: Subject
label: 05000321/LER-1987-015-01, :on 870827 & 28,main Control Room Environ Control Sys Actuated on Signal from Refueling Floor Area Radiation Monitor,Resulting in 870827 Pressurization.Caused by Faulty Gm Tube.Tube Replaced
page: https://kanterella.com/05000321/LER-2D1987-2D015-2D01-2C_-3Aon_870827_-26_28-2Cmain_Control_Room_Environ_Control_Sys_Actuated_on_Signal_from_Refueling_Floor_Area_Radiation_Monitor-2CResulting_in_87082…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000321/LER-1987-015-01, :on 870827 & 28,main Control Room Environ Control Sys Actuated on Signal from Refueling Floor Area Radiation Monitor,Resulting in 870827 Pressurization.Caused by Faulty Gm Tube.Tube Replaced

LER-1997-009, :on 970906,reactor Trip Occurred on Both Units Due to Loss of non-vital Power to Plant components.Re-closed Breaker MKA-1B,restored Kxa to Svc,Replaced Breaker MKA-1B & Repaiared Cable Connection
type: Subject
label: 05000369/LER-1997-009, :on 970906,reactor Trip Occurred on Both Units Due to Loss of non-vital Power to Plant components.Re-closed Breaker MKA-1B,restored Kxa to Svc,Replaced Breaker MKA-1B & Repaiared Cable Connection
page: https://kanterella.com/05000369/LER-2D1997-2D009-2C_-3Aon_970906-2Creactor_Trip_Occurred_on_Both_Units_Due_to_Loss_of_non-2Dvital_Power_to_Plant_components.Re-2Dclosed_Breaker_MKA-2D1B-2Crestored_Kxa_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000369/LER-1997-009, :on 970906,reactor Trip Occurred on Both Units Due to Loss of non-vital Power to Plant components.Re-closed Breaker MKA-1B,restored Kxa to Svc,Replaced Breaker MKA-1B & Repaiared Cable Connection

05000334/LER-1999-012, :on 990915,inoperability of Loop 1 Over Temperature Delta Temperature Function,Was Discovered.Caused by Personnel Error.Discussed with I&C Technicians.With
type: Subject
page: https://kanterella.com/05000334/LER-2D1999-2D012-2C_-3Aon_990915-2Cinoperability_of_Loop_1_Over_Temperature_Delta_Temperature_Function-2CWas_Discovered.Caused_by_Personnel_Error.Discussed_with_I-26C_T…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000334/LER-1999-012, :on 990915,inoperability of Loop 1 Over Temperature Delta Temperature Function,Was Discovered.Caused by Personnel Error.Discussed with I&C Technicians.With

05000395/LER-1997-003, :on 970817,plant Was Entered Into TS 3.0.3. Cause Due to Less than Minimum Two Channels of OTDT Operable.Procedures Requiring Rev Due to TS Amend 75 Were Verified & Completed
type: Subject
page: https://kanterella.com/05000395/LER-2D1997-2D003-2C_-3Aon_970817-2Cplant_Was_Entered_Into_TS_3.0.3._Cause_Due_to_Less_than_Minimum_Two_Channels_of_OTDT_Operable.Procedures_Requiring_Rev_Due_to_TS_Amen…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000395/LER-1997-003, :on 970817,plant Was Entered Into TS 3.0.3. Cause Due to Less than Minimum Two Channels of OTDT Operable.Procedures Requiring Rev Due to TS Amend 75 Were Verified & Completed

Rod K-2 Will Be Replaced & Rod Will Be Tested During Startup Testing
type: Subject
label: 05000364/LER-1998-001-05, :on 980328,manual Reactor Trip Due to Dropped Control Rod K-2,was Determined.Caused by Overcurrent Condition.Crdm Cable & Connectors Associated W/Rod K-2 Will Be Replaced & Rod Will Be Tested During Startup Testing
page: https://kanterella.com/05000364/LER-2D1998-2D001-2D05-2C_-3Aon_980328-2Cmanual_Reactor_Trip_Due_to_Dropped_Control_Rod_K-2D2-2Cwas_Determined.Caused_by_Overcurrent_Condition.Crdm_Cable_-26_Connectors_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000364/LER-1998-001-05, :on 980328,manual Reactor Trip Due to Dropped Control Rod K-2,was Determined.Caused by Overcurrent Condition.Crdm Cable & Connectors Associated W/Rod K-2 Will Be Replaced & Rod Will Be Tested During Startup Testing

05000366/LER-1986-030-01, :on 860925,full Reactor Protection Sys Actuations Occurred.Caused by Static Electrical Noise. Operations Personnel Reset Actuation Signal
type: Subject
page: https://kanterella.com/05000366/LER-2D1986-2D030-2D01-2C_-3Aon_860925-2Cfull_Reactor_Protection_Sys_Actuations_Occurred.Caused_by_Static_Electrical_Noise._Operations_Personnel_Reset_Actuation_Signal
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000366/LER-1986-030-01, :on 860925,full Reactor Protection Sys Actuations Occurred.Caused by Static Electrical Noise. Operations Personnel Reset Actuation Signal

LER-1986-018-02, :on 860924 & 25,high Pressure Reactor Trip Occurred.Caused by Turbine Control Sys Malfunction. Troubleshooting & Testing Performed on Digital Electrohydraulic Turbine Control Sys
type: Subject
label: 05000369/LER-1986-018-02, :on 860924 & 25,high Pressure Reactor Trip Occurred.Caused by Turbine Control Sys Malfunction. Troubleshooting & Testing Performed on Digital Electrohydraulic Turbine Control Sys
page: https://kanterella.com/05000369/LER-2D1986-2D018-2D02-2C_-3Aon_860924_-26_25-2Chigh_Pressure_Reactor_Trip_Occurred.Caused_by_Turbine_Control_Sys_Malfunction._Troubleshooting_-26_Testing_Performed_on_D…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000369/LER-1986-018-02, :on 860924 & 25,high Pressure Reactor Trip Occurred.Caused by Turbine Control Sys Malfunction. Troubleshooting & Testing Performed on Digital Electrohydraulic Turbine Control Sys

LER-1986-051, :on 860106,emergency Hatch Between Upper & Lower Containment Inoperable.Caused by Personnel Error. Importance of Instructions & Directions in Work Requests & Procedures Will Be Reviewed
type: Subject
label: 05000413/LER-1986-051, :on 860106,emergency Hatch Between Upper & Lower Containment Inoperable.Caused by Personnel Error. Importance of Instructions & Directions in Work Requests & Procedures Will Be Reviewed
page: https://kanterella.com/05000413/LER-2D1986-2D051-2C_-3Aon_860106-2Cemergency_Hatch_Between_Upper_-26_Lower_Containment_Inoperable.Caused_by_Personnel_Error._Importance_of_Instructions_-26_Directions_i…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000413/LER-1986-051, :on 860106,emergency Hatch Between Upper & Lower Containment Inoperable.Caused by Personnel Error. Importance of Instructions & Directions in Work Requests & Procedures Will Be Reviewed

LER-1987-018, :on 870520,during Troubleshooting of Leakage Discovered in Drywell,Rwcu Inboard Isolation Valve Isolated Twice & Outboard Isolation Valve Once.Caused by Latent Heat Migration in Sys Piping.Valve Repacked
type: Subject
label: 05000341/LER-1987-018, :on 870520,during Troubleshooting of Leakage Discovered in Drywell,Rwcu Inboard Isolation Valve Isolated Twice & Outboard Isolation Valve Once.Caused by Latent Heat Migration in Sys Piping.Valve Repacked
page: https://kanterella.com/05000341/LER-2D1987-2D018-2C_-3Aon_870520-2Cduring_Troubleshooting_of_Leakage_Discovered_in_Drywell-2CRwcu_Inboard_Isolation_Valve_Isolated_Twice_-26_Outboard_Isolation_Valve_On…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000341/LER-1987-018, :on 870520,during Troubleshooting of Leakage Discovered in Drywell,Rwcu Inboard Isolation Valve Isolated Twice & Outboard Isolation Valve Once.Caused by Latent Heat Migration in Sys Piping.Valve Repacked

Inadequate Review.Review & Reanalysis Will Be Performed on Various Accidents Described in FSAR
type: Subject
label: 05000267/LER-1986-026, :on 860917,FSAR Analysis for Safe Shutdown Cooling W/Firewater Invalid.Caused by Incomplete Analysis/ Inadequate Review.Review & Reanalysis Will Be Performed on Various Accidents Described in FSAR
page: https://kanterella.com/05000267/LER-2D1986-2D026-2C_-3Aon_860917-2CFSAR_Analysis_for_Safe_Shutdown_Cooling_W/Firewater_Invalid.Caused_by_Incomplete_Analysis/_Inadequate_Review.Review_-26_Reanalysis_Wi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000267/LER-1986-026, :on 860917,FSAR Analysis for Safe Shutdown Cooling W/Firewater Invalid.Caused by Incomplete Analysis/ Inadequate Review.Review & Reanalysis Will Be Performed on Various Accidents Described in FSAR

05000366/LER-1986-017-01, :on 860915,RCIC Inboard Primary Containment Isolation Sys Valve Closed for No Apparent Reason.Caused by Spurious Electrical Noise.Valve Reopened
type: Subject
page: https://kanterella.com/05000366/LER-2D1986-2D017-2D01-2C_-3Aon_860915-2CRCIC_Inboard_Primary_Containment_Isolation_Sys_Valve_Closed_for_No_Apparent_Reason.Caused_by_Spurious_Electrical_Noise.Valve_Reo…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000366/LER-1986-017-01, :on 860915,RCIC Inboard Primary Containment Isolation Sys Valve Closed for No Apparent Reason.Caused by Spurious Electrical Noise.Valve Reopened

LER-1986-030, :on 860919,high Flux Scram Received on Nuclear Instrumentation Channel 6,causing Fast Spike from 19 to 36- of Scale.Caused by Malfunction of Instrument Channel. Replacement Nuclear Instrumentation Ordered
type: Subject
label: 05000409/LER-1986-030, :on 860919,high Flux Scram Received on Nuclear Instrumentation Channel 6,causing Fast Spike from 19 to 36% of Scale.Caused by Malfunction of Instrument Channel. Replacement Nuclear Instrumentation Ordered
page: https://kanterella.com/05000409/LER-2D1986-2D030-2C_-3Aon_860919-2Chigh_Flux_Scram_Received_on_Nuclear_Instrumentation_Channel_6-2Ccausing_Fast_Spike_from_19_to_36-_of_Scale.Caused_by_Malfunction_of_I…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000409/LER-1986-030, :on 860919,high Flux Scram Received on Nuclear Instrumentation Channel 6,causing Fast Spike from 19 to 36% of Scale.Caused by Malfunction of Instrument Channel. Replacement Nuclear Instrumentation Ordered

LER-1987-013, :on 870316,manual Reactor Trip Occurred After Main Feedwater Control Valve Failed Closed.Cause Unknown. Control Circuit Components Replaced & Tested & Reactor Trip Response Procedure Revised
type: Subject
label: 05000413/LER-1987-013, :on 870316,manual Reactor Trip Occurred After Main Feedwater Control Valve Failed Closed.Cause Unknown. Control Circuit Components Replaced & Tested & Reactor Trip Response Procedure Revised
page: https://kanterella.com/05000413/LER-2D1987-2D013-2C_-3Aon_870316-2Cmanual_Reactor_Trip_Occurred_After_Main_Feedwater_Control_Valve_Failed_Closed.Cause_Unknown._Control_Circuit_Components_Replaced_-26_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000413/LER-1987-013, :on 870316,manual Reactor Trip Occurred After Main Feedwater Control Valve Failed Closed.Cause Unknown. Control Circuit Components Replaced & Tested & Reactor Trip Response Procedure Revised

LER-1986-010-04, :on 860828,potential for Lack of Pump Runout Protection During Certain Design Basis Transients Found. Caused by Failure to Analyze Emergency Feedwater Sys for All Design Basis Transients
type: Subject
label: 05000269/LER-1986-010-04, :on 860828,potential for Lack of Pump Runout Protection During Certain Design Basis Transients Found. Caused by Failure to Analyze Emergency Feedwater Sys for All Design Basis Transients
page: https://kanterella.com/05000269/LER-2D1986-2D010-2D04-2C_-3Aon_860828-2Cpotential_for_Lack_of_Pump_Runout_Protection_During_Certain_Design_Basis_Transients_Found._Caused_by_Failure_to_Analyze_Emergenc…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000269/LER-1986-010-04, :on 860828,potential for Lack of Pump Runout Protection During Certain Design Basis Transients Found. Caused by Failure to Analyze Emergency Feedwater Sys for All Design Basis Transients

LER-1986-010, :on 860623,containment Spray Pump 2B Declared Inoperable Due to Refueling Water Storage Tank Temp Exceeding 100 F.Pump 2A Declared Inoperable on 860619.Caused by Inadequate Procedures for Temp Monitoring
type: Subject
label: 05000370/LER-1986-010, :on 860623,containment Spray Pump 2B Declared Inoperable Due to Refueling Water Storage Tank Temp Exceeding 100 F.Pump 2A Declared Inoperable on 860619.Caused by Inadequate Procedures for Temp Monitoring
page: https://kanterella.com/05000370/LER-2D1986-2D010-2C_-3Aon_860623-2Ccontainment_Spray_Pump_2B_Declared_Inoperable_Due_to_Refueling_Water_Storage_Tank_Temp_Exceeding_100_F.Pump_2A_Declared_Inoperable_on…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000370/LER-1986-010, :on 860623,containment Spray Pump 2B Declared Inoperable Due to Refueling Water Storage Tank Temp Exceeding 100 F.Pump 2A Declared Inoperable on 860619.Caused by Inadequate Procedures for Temp Monitoring

LER-1986-049, :on 860825,automatic Alignment of Nuclear Svc Water Sys to Standby Nuclear Svc Water Pond Inadvertently Occurred.Caused by Personnel Error.Sys Realigned & Transfer Switch Returned to Control Room Position
type: Subject
label: 05000413/LER-1986-049, :on 860825,automatic Alignment of Nuclear Svc Water Sys to Standby Nuclear Svc Water Pond Inadvertently Occurred.Caused by Personnel Error.Sys Realigned & Transfer Switch Returned to Control Room Position
page: https://kanterella.com/05000413/LER-2D1986-2D049-2C_-3Aon_860825-2Cautomatic_Alignment_of_Nuclear_Svc_Water_Sys_to_Standby_Nuclear_Svc_Water_Pond_Inadvertently_Occurred.Caused_by_Personnel_Error.Sys_R…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000413/LER-1986-049, :on 860825,automatic Alignment of Nuclear Svc Water Sys to Standby Nuclear Svc Water Pond Inadvertently Occurred.Caused by Personnel Error.Sys Realigned & Transfer Switch Returned to Control Room Position

LER-1986-038, :on 861107,containment Purge Isolation Signal & Control Room Ventilation Isolation Occurred Due to Increased Gaseous Radioactivity Levels in Containment.Caused by Unanticipated Leakage from Pressurizer PORV Block Valve
type: Subject
label: 05000483/LER-1986-038, :on 861107,containment Purge Isolation Signal & Control Room Ventilation Isolation Occurred Due to Increased Gaseous Radioactivity Levels in Containment.Caused by Unanticipated Leakage from Pressurizer PORV Block Valve
page: https://kanterella.com/05000483/LER-2D1986-2D038-2C_-3Aon_861107-2Ccontainment_Purge_Isolation_Signal_-26_Control_Room_Ventilation_Isolation_Occurred_Due_to_Increased_Gaseous_Radioactivity_Levels_in_C…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000483/LER-1986-038, :on 861107,containment Purge Isolation Signal & Control Room Ventilation Isolation Occurred Due to Increased Gaseous Radioactivity Levels in Containment.Caused by Unanticipated Leakage from Pressurizer PORV Block Valve

LER-1987-009, :on 870510,during Performance of Svc Water (SW) Flowpath Verification,Rhr Pump 1B Room Cooler SW Isolation Valves Found Closed.Caused by Personnel Not Ensuring That Valves Repositioned.Personnel Counseled
type: Subject
label: 05000348/LER-1987-009, :on 870510,during Performance of Svc Water (SW) Flowpath Verification,Rhr Pump 1B Room Cooler SW Isolation Valves Found Closed.Caused by Personnel Not Ensuring That Valves Repositioned.Personnel Counseled
page: https://kanterella.com/05000348/LER-2D1987-2D009-2C_-3Aon_870510-2Cduring_Performance_of_Svc_Water_-28SW-29_Flowpath_Verification-2CRhr_Pump_1B_Room_Cooler_SW_Isolation_Valves_Found_Closed.Caused_by_P…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000348/LER-1987-009, :on 870510,during Performance of Svc Water (SW) Flowpath Verification,Rhr Pump 1B Room Cooler SW Isolation Valves Found Closed.Caused by Personnel Not Ensuring That Valves Repositioned.Personnel Counseled

LER-1986-025, :on 860821,containment Bldg Ventilation Isolation Occurred on High Gaseous Activity Monitor Alarm. Caused by Welding.Correlation Between Welding & Increased Gaseous Activity Checked
type: Subject
label: 05000409/LER-1986-025, :on 860821,containment Bldg Ventilation Isolation Occurred on High Gaseous Activity Monitor Alarm. Caused by Welding.Correlation Between Welding & Increased Gaseous Activity Checked
page: https://kanterella.com/05000409/LER-2D1986-2D025-2C_-3Aon_860821-2Ccontainment_Bldg_Ventilation_Isolation_Occurred_on_High_Gaseous_Activity_Monitor_Alarm._Caused_by_Welding.Correlation_Between_Welding…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000409/LER-1986-025, :on 860821,containment Bldg Ventilation Isolation Occurred on High Gaseous Activity Monitor Alarm. Caused by Welding.Correlation Between Welding & Increased Gaseous Activity Checked

05000483/LER-1986-036, :on 860321,two Sealed Sources Discovered Placed Into Use W/O Performing Leak Testing.Caused by Cognitive Personnel Error.Sealed Sources Leak Tested by Vendor Prior to Shipment
type: Subject
page: https://kanterella.com/05000483/LER-2D1986-2D036-2C_-3Aon_860321-2Ctwo_Sealed_Sources_Discovered_Placed_Into_Use_W/O_Performing_Leak_Testing.Caused_by_Cognitive_Personnel_Error.Sealed_Sources_Leak_Tes…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000483/LER-1986-036, :on 860321,two Sealed Sources Discovered Placed Into Use W/O Performing Leak Testing.Caused by Cognitive Personnel Error.Sealed Sources Leak Tested by Vendor Prior to Shipment

05000301/LER-1986-007, :on 861009-22,eddy Current Insp of Steam Generator Tubes Conducted.Eight Tubes Degraded Equal to or Greater than 40% & Six W/Undefined Signal.All 58 Tubes Plugged
type: Subject
page: https://kanterella.com/05000301/LER-2D1986-2D007-2C_-3Aon_861009-2D22-2Ceddy_Current_Insp_of_Steam_Generator_Tubes_Conducted.Eight_Tubes_Degraded_Equal_to_or_Greater_than_40-_-26_Six_W/Undefined_Signa…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000301/LER-1986-007, :on 861009-22,eddy Current Insp of Steam Generator Tubes Conducted.Eight Tubes Degraded Equal to or Greater than 40% & Six W/Undefined Signal.All 58 Tubes Plugged

LER-1986-034-01, :on 860804,manual Reactor Trip Initiated Due to Unexpected Closure of Main Feedwater Containment Isolation Valves.Cause Unknown.Turbine Driven CA Pump Secured & Letdown Flow Reestablished
type: Subject
label: 05000414/LER-1986-034-01, :on 860804,manual Reactor Trip Initiated Due to Unexpected Closure of Main Feedwater Containment Isolation Valves.Cause Unknown.Turbine Driven CA Pump Secured & Letdown Flow Reestablished
page: https://kanterella.com/05000414/LER-2D1986-2D034-2D01-2C_-3Aon_860804-2Cmanual_Reactor_Trip_Initiated_Due_to_Unexpected_Closure_of_Main_Feedwater_Containment_Isolation_Valves.Cause_Unknown.Turbine_Dri…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000414/LER-1986-034-01, :on 860804,manual Reactor Trip Initiated Due to Unexpected Closure of Main Feedwater Containment Isolation Valves.Cause Unknown.Turbine Driven CA Pump Secured & Letdown Flow Reestablished

LER-1986-015-05, :on 860805,reactor Bldg Ventilation Particulate Sampler Filter Found Broken When Radiation Chemistry Technician (RCT) Attempted to Remove Filter for Counting. Caused by Improper Installation by RCT
type: Subject
label: 05000237/LER-1986-015-05, :on 860805,reactor Bldg Ventilation Particulate Sampler Filter Found Broken When Radiation Chemistry Technician (RCT) Attempted to Remove Filter for Counting. Caused by Improper Installation by RCT
page: https://kanterella.com/05000237/LER-2D1986-2D015-2D05-2C_-3Aon_860805-2Creactor_Bldg_Ventilation_Particulate_Sampler_Filter_Found_Broken_When_Radiation_Chemistry_Technician_-28RCT-29_Attempted_to_Remo…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000237/LER-1986-015-05, :on 860805,reactor Bldg Ventilation Particulate Sampler Filter Found Broken When Radiation Chemistry Technician (RCT) Attempted to Remove Filter for Counting. Caused by Improper Installation by RCT

LER-1986-027-01, :on 860731,control Room Emergency Ventilation Sys Fan a Observed Not Running Despite Completion of auto- Initiation Logic.Caused by Faulty Starter Coil.Suspected Starter Replaced
type: Subject
label: 05000259/LER-1986-027-01, :on 860731,control Room Emergency Ventilation Sys Fan a Observed Not Running Despite Completion of auto- Initiation Logic.Caused by Faulty Starter Coil.Suspected Starter Replaced
page: https://kanterella.com/05000259/LER-2D1986-2D027-2D01-2C_-3Aon_860731-2Ccontrol_Room_Emergency_Ventilation_Sys_Fan_a_Observed_Not_Running_Despite_Completion_of_auto-2D_Initiation_Logic.Caused_by_Fault…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000259/LER-1986-027-01, :on 860731,control Room Emergency Ventilation Sys Fan a Observed Not Running Despite Completion of auto- Initiation Logic.Caused by Faulty Starter Coil.Suspected Starter Replaced

Drywell Sump Flow Monitoring Sys Inoperable.Caused by Inadequate Procedure Which Resulted from Cognitive Personnel Error. Surveillance Procedure Revised
type: Subject
label: 05000341/LER-1986-041, :on 861021,plant Allowed to Operate W/Drywell Sump Flow Monitoring Sys Inoperable.Caused by Inadequate Procedure Which Resulted from Cognitive Personnel Error. Surveillance Procedure Revised
page: https://kanterella.com/05000341/LER-2D1986-2D041-2C_-3Aon_861021-2Cplant_Allowed_to_Operate_W/Drywell_Sump_Flow_Monitoring_Sys_Inoperable.Caused_by_Inadequate_Procedure_Which_Resulted_from_Cognitive_P…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000341/LER-1986-041, :on 861021,plant Allowed to Operate W/Drywell Sump Flow Monitoring Sys Inoperable.Caused by Inadequate Procedure Which Resulted from Cognitive Personnel Error. Surveillance Procedure Revised

Safety Injection Signal.Tech Spec Change Requested & Granted on 870504
type: Subject
label: 05000483/LER-1987-006, :on 870413,util Received Ltr from Westinghouse Re Inaccuracy in Tech Specs for Response Times Associated W/ Safety Injection Signal.Tech Spec Change Requested & Granted on 870504
page: https://kanterella.com/05000483/LER-2D1987-2D006-2C_-3Aon_870413-2Cutil_Received_Ltr_from_Westinghouse_Re_Inaccuracy_in_Tech_Specs_for_Response_Times_Associated_W/_Safety_Injection_Signal.Tech_Spec_Ch…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000483/LER-1987-006, :on 870413,util Received Ltr from Westinghouse Re Inaccuracy in Tech Specs for Response Times Associated W/ Safety Injection Signal.Tech Spec Change Requested & Granted on 870504

LER-1986-007-01, :on 861011,automatic Actuation of Reactor Protection Sys on High Axial Shape Index Initiated Reactor Trip.Caused by Lack of Detailed Procedural Guidance for Specific Plant Conditions
type: Subject
label: 05000317/LER-1986-007-01, :on 861011,automatic Actuation of Reactor Protection Sys on High Axial Shape Index Initiated Reactor Trip.Caused by Lack of Detailed Procedural Guidance for Specific Plant Conditions
page: https://kanterella.com/05000317/LER-2D1986-2D007-2D01-2C_-3Aon_861011-2Cautomatic_Actuation_of_Reactor_Protection_Sys_on_High_Axial_Shape_Index_Initiated_Reactor_Trip.Caused_by_Lack_of_Detailed_Proced…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000317/LER-1986-007-01, :on 861011,automatic Actuation of Reactor Protection Sys on High Axial Shape Index Initiated Reactor Trip.Caused by Lack of Detailed Procedural Guidance for Specific Plant Conditions

LER-1986-013-02, :on 861005,auxiliary Feedwater Pumps Started & Steam Generator Blowdown Trip Valves Closed.Caused by Cycling of Auxiliary Lube Oil Pump for Main Feed Pump (MFP) & Trip of MFP Breaker.Procedures Changed
type: Subject
label: 05000281/LER-1986-013-02, :on 861005,auxiliary Feedwater Pumps Started & Steam Generator Blowdown Trip Valves Closed.Caused by Cycling of Auxiliary Lube Oil Pump for Main Feed Pump (MFP) & Trip of MFP Breaker.Procedures Changed
page: https://kanterella.com/05000281/LER-2D1986-2D013-2D02-2C_-3Aon_861005-2Cauxiliary_Feedwater_Pumps_Started_-26_Steam_Generator_Blowdown_Trip_Valves_Closed.Caused_by_Cycling_of_Auxiliary_Lube_Oil_Pump_f…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000281/LER-1986-013-02, :on 861005,auxiliary Feedwater Pumps Started & Steam Generator Blowdown Trip Valves Closed.Caused by Cycling of Auxiliary Lube Oil Pump for Main Feed Pump (MFP) & Trip of MFP Breaker.Procedures Changed

LER-1986-014-02, :on 861010,results of Type C Containment Leakage Testing Indicated That Inside & Outside Containment Sump Trip Valves Had Leakage Greater than 300 Scfh.Caused by Erosion of Plug & Seat.Valves Will Be Replaced
type: Subject
label: 05000281/LER-1986-014-02, :on 861010,results of Type C Containment Leakage Testing Indicated That Inside & Outside Containment Sump Trip Valves Had Leakage Greater than 300 Scfh.Caused by Erosion of Plug & Seat.Valves Will Be Replaced
page: https://kanterella.com/05000281/LER-2D1986-2D014-2D02-2C_-3Aon_861010-2Cresults_of_Type_C_Containment_Leakage_Testing_Indicated_That_Inside_-26_Outside_Containment_Sump_Trip_Valves_Had_Leakage_Greater…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000281/LER-1986-014-02, :on 861010,results of Type C Containment Leakage Testing Indicated That Inside & Outside Containment Sump Trip Valves Had Leakage Greater than 300 Scfh.Caused by Erosion of Plug & Seat.Valves Will Be Replaced

LER-1986-039, :on 861227,reactor Tripped Following Loss of Turbine Electrical Load Due to Failed Turbine Governor Control Oil Pressure.Turbine Control Oil,Lube Oil & Seal Oil Piping Will Be Cleaned
type: Subject
label: 05000250/LER-1986-039, :on 861227,reactor Tripped Following Loss of Turbine Electrical Load Due to Failed Turbine Governor Control Oil Pressure.Turbine Control Oil,Lube Oil & Seal Oil Piping Will Be Cleaned
page: https://kanterella.com/05000250/LER-2D1986-2D039-2C_-3Aon_861227-2Creactor_Tripped_Following_Loss_of_Turbine_Electrical_Load_Due_to_Failed_Turbine_Governor_Control_Oil_Pressure.Turbine_Control_Oil-2CL…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000250/LER-1986-039, :on 861227,reactor Tripped Following Loss of Turbine Electrical Load Due to Failed Turbine Governor Control Oil Pressure.Turbine Control Oil,Lube Oil & Seal Oil Piping Will Be Cleaned

05000409/LER-1987-002, :on 870216,manual Reactor Scram Following Receipt of First Out Alarm on Annunciator Scram Panel Occurred.Caused by Shorted Input Capacitor in Alarm Card. Alarm Card Replaced
type: Subject
page: https://kanterella.com/05000409/LER-2D1987-2D002-2C_-3Aon_870216-2Cmanual_Reactor_Scram_Following_Receipt_of_First_Out_Alarm_on_Annunciator_Scram_Panel_Occurred.Caused_by_Shorted_Input_Capacitor_in_Al…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000409/LER-1987-002, :on 870216,manual Reactor Scram Following Receipt of First Out Alarm on Annunciator Scram Panel Occurred.Caused by Shorted Input Capacitor in Alarm Card. Alarm Card Replaced

05000370/LER-1986-011-03, :on 860625,auxiliary Feedwater Sys Automatically Started Due to Condensate Booster Pump Trip on False Low Flow Indication.Cause Undetermined. Pump 2B Manually Started
type: Subject
page: https://kanterella.com/05000370/LER-2D1986-2D011-2D03-2C_-3Aon_860625-2Cauxiliary_Feedwater_Sys_Automatically_Started_Due_to_Condensate_Booster_Pump_Trip_on_False_Low_Flow_Indication.Cause_Undetermine…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000370/LER-1986-011-03, :on 860625,auxiliary Feedwater Sys Automatically Started Due to Condensate Booster Pump Trip on False Low Flow Indication.Cause Undetermined. Pump 2B Manually Started

LER-1987-001-02, :on 870203,load Limit Setting on Emergency Diesel Generator 2H Determined to Be Incorrect.On 870206, Emergency Diesel Generator 2J Load Setting Also Incorrect. Caused by Failure to Follow Procedure
type: Subject
label: 05000339/LER-1987-001-02, :on 870203,load Limit Setting on Emergency Diesel Generator 2H Determined to Be Incorrect.On 870206, Emergency Diesel Generator 2J Load Setting Also Incorrect. Caused by Failure to Follow Procedure
page: https://kanterella.com/05000339/LER-2D1987-2D001-2D02-2C_-3Aon_870203-2Cload_Limit_Setting_on_Emergency_Diesel_Generator_2H_Determined_to_Be_Incorrect.On_870206-2C_Emergency_Diesel_Generator_2J_Load_S…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000339/LER-1987-001-02, :on 870203,load Limit Setting on Emergency Diesel Generator 2H Determined to Be Incorrect.On 870206, Emergency Diesel Generator 2J Load Setting Also Incorrect. Caused by Failure to Follow Procedure

LER-1986-031, :on 860724,surveillance Requirement Interval for Station Batteries Exceeded by 9 H & 20 Minutes.Caused by Inadequate Shift Turnover & Cumbersome Test Tracking Sys. Event Discussed & Procedures Revised
type: Subject
label: 05000346/LER-1986-031, :on 860724,surveillance Requirement Interval for Station Batteries Exceeded by 9 H & 20 Minutes.Caused by Inadequate Shift Turnover & Cumbersome Test Tracking Sys. Event Discussed & Procedures Revised
page: https://kanterella.com/05000346/LER-2D1986-2D031-2C_-3Aon_860724-2Csurveillance_Requirement_Interval_for_Station_Batteries_Exceeded_by_9_H_-26_20_Minutes.Caused_by_Inadequate_Shift_Turnover_-26_Cumber…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000346/LER-1986-031, :on 860724,surveillance Requirement Interval for Station Batteries Exceeded by 9 H & 20 Minutes.Caused by Inadequate Shift Turnover & Cumbersome Test Tracking Sys. Event Discussed & Procedures Revised

LER-1986-029, :on 861228,hi-hi Alarm Occurred on Radiation Monitor ARM-IRE-0200.1S.Caused by Monitors Sensitivity to Electrical Spikes,Vibration & Light.Efforts Continuing to Reduce Sensitivity of Monitors
type: Subject
label: 05000382/LER-1986-029, :on 861228,hi-hi Alarm Occurred on Radiation Monitor ARM-IRE-0200.1S.Caused by Monitors Sensitivity to Electrical Spikes,Vibration & Light.Efforts Continuing to Reduce Sensitivity of Monitors
page: https://kanterella.com/05000382/LER-2D1986-2D029-2C_-3Aon_861228-2Chi-2Dhi_Alarm_Occurred_on_Radiation_Monitor_ARM-2DIRE-2D0200.1S.Caused_by_Monitors_Sensitivity_to_Electrical_Spikes-2CVibration_-26_L…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000382/LER-1986-029, :on 861228,hi-hi Alarm Occurred on Radiation Monitor ARM-IRE-0200.1S.Caused by Monitors Sensitivity to Electrical Spikes,Vibration & Light.Efforts Continuing to Reduce Sensitivity of Monitors

05000483/LER-1986-040, :on 861223,auxiliary Feedwater Actuation of motor-driven Auxiliary Feedwater Pump B Occurred.Caused by Inappropriate Human Performance.Event Discussed W/Operations Personnel
type: Subject
page: https://kanterella.com/05000483/LER-2D1986-2D040-2C_-3Aon_861223-2Cauxiliary_Feedwater_Actuation_of_motor-2Ddriven_Auxiliary_Feedwater_Pump_B_Occurred.Caused_by_Inappropriate_Human_Performance.Event_D…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000483/LER-1986-040, :on 861223,auxiliary Feedwater Actuation of motor-driven Auxiliary Feedwater Pump B Occurred.Caused by Inappropriate Human Performance.Event Discussed W/Operations Personnel

LER-1986-036, :on 860708,while Metering Charging Pump Out of Svc,Charging Pump a Taken Out of Svc Due to Broken Shaft. Caused by Metal Fatigue.Plant Placed in Hot Shutdown. Procedures Re Pumps Revised
type: Subject
label: 05000213/LER-1986-036, :on 860708,while Metering Charging Pump Out of Svc,Charging Pump a Taken Out of Svc Due to Broken Shaft. Caused by Metal Fatigue.Plant Placed in Hot Shutdown. Procedures Re Pumps Revised
page: https://kanterella.com/05000213/LER-2D1986-2D036-2C_-3Aon_860708-2Cwhile_Metering_Charging_Pump_Out_of_Svc-2CCharging_Pump_a_Taken_Out_of_Svc_Due_to_Broken_Shaft._Caused_by_Metal_Fatigue.Plant_Placed_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000213/LER-1986-036, :on 860708,while Metering Charging Pump Out of Svc,Charging Pump a Taken Out of Svc Due to Broken Shaft. Caused by Metal Fatigue.Plant Placed in Hot Shutdown. Procedures Re Pumps Revised

New Components & Returned Defective Vasasps to Vendor for Analysis
type: Subject
label: 05000458/LER-1997-007-02, :on 970926,discovered Cracked EDG Valve Adjusting Screw Assembly Swivel Pads (Vasasps).Caused by Mfg Defect.Replaced Vasasps in EDGs W/New Components & Returned Defective Vasasps to Vendor for Analysis
page: https://kanterella.com/05000458/LER-2D1997-2D007-2D02-2C_-3Aon_970926-2Cdiscovered_Cracked_EDG_Valve_Adjusting_Screw_Assembly_Swivel_Pads_-28Vasasps-29.Caused_by_Mfg_Defect.Replaced_Vasasps_in_EDGs_W/…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000458/LER-1997-007-02, :on 970926,discovered Cracked EDG Valve Adjusting Screw Assembly Swivel Pads (Vasasps).Caused by Mfg Defect.Replaced Vasasps in EDGs W/New Components & Returned Defective Vasasps to Vendor for Analysis

LER-1986-008-04, :on 861130,containment Ventilation Isolation Occurred.Caused by Personnel Error.Disciplinary Action Taken to Ensure That Instrument Mechanic Follows Procedures in Future to Prevent Recurrence
type: Subject
label: 05000328/LER-1986-008-04, :on 861130,containment Ventilation Isolation Occurred.Caused by Personnel Error.Disciplinary Action Taken to Ensure That Instrument Mechanic Follows Procedures in Future to Prevent Recurrence
page: https://kanterella.com/05000328/LER-2D1986-2D008-2D04-2C_-3Aon_861130-2Ccontainment_Ventilation_Isolation_Occurred.Caused_by_Personnel_Error.Disciplinary_Action_Taken_to_Ensure_That_Instrument_Mechani…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000328/LER-1986-008-04, :on 861130,containment Ventilation Isolation Occurred.Caused by Personnel Error.Disciplinary Action Taken to Ensure That Instrument Mechanic Follows Procedures in Future to Prevent Recurrence

Water & Subsequent Transformer Trip.Caused by Shortened Microswitch in Relay Housing
type: Subject
label: 05000327/LER-1986-026, :on 860629,sudden Pressure Relay Failed on Common Station Svc Transformer D,Causing Fire Suppression Sys to Spray Transformer W/Water & Subsequent Transformer Trip.Caused by Shortened Microswitch in Relay Housing
page: https://kanterella.com/05000327/LER-2D1986-2D026-2C_-3Aon_860629-2Csudden_Pressure_Relay_Failed_on_Common_Station_Svc_Transformer_D-2CCausing_Fire_Suppression_Sys_to_Spray_Transformer_W/Water_-26_Subs…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000327/LER-1986-026, :on 860629,sudden Pressure Relay Failed on Common Station Svc Transformer D,Causing Fire Suppression Sys to Spray Transformer W/Water & Subsequent Transformer Trip.Caused by Shortened Microswitch in Relay Housing

05000312/LER-1986-013, :on 860630,0706,22 & 23,CR/TSC Essential HVAC Sys a & B Autostarted.Incidents Part of Recurring Problems W/Design,Control & Operation of Cr/Tsc Essential HVAC Sys.W/
type: Subject
page: https://kanterella.com/05000312/LER-2D1986-2D013-2C_-3Aon_860630-2C0706-2C22_-26_23-2CCR/TSC_Essential_HVAC_Sys_a_-26_B_Autostarted.Incidents_Part_of_Recurring_Problems_W/Design-2CControl_-26_Operatio…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000312/LER-1986-013, :on 860630,0706,22 & 23,CR/TSC Essential HVAC Sys a & B Autostarted.Incidents Part of Recurring Problems W/Design,Control & Operation of Cr/Tsc Essential HVAC Sys.W/

Excessively Fast Cooldown.Caused by Failure of Allied Control,Model MHYO-12A 115-volt Ac Relay
type: Subject
label: 05000409/LER-1986-035, :on 861118,failure of Low turbine-condenser Vacuum Relay SK25/1 Caused Reactor Scram W/Excessively Fast Cooldown.Caused by Failure of Allied Control,Model MHYO-12A 115-volt Ac Relay
page: https://kanterella.com/05000409/LER-2D1986-2D035-2C_-3Aon_861118-2Cfailure_of_Low_turbine-2Dcondenser_Vacuum_Relay_SK25/1_Caused_Reactor_Scram_W/Excessively_Fast_Cooldown.Caused_by_Failure_of_Allied_C…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000409/LER-1986-035, :on 861118,failure of Low turbine-condenser Vacuum Relay SK25/1 Caused Reactor Scram W/Excessively Fast Cooldown.Caused by Failure of Allied Control,Model MHYO-12A 115-volt Ac Relay

05000302/LER-1986-021, :on 861112,emergency Feedwater Sys Actuation Occurred.Caused by Auxiliary Steam Regulating Valve Malfunction.Valve Repaired & Tested & Procedures Revised.W/
type: Subject
page: https://kanterella.com/05000302/LER-2D1986-2D021-2C_-3Aon_861112-2Cemergency_Feedwater_Sys_Actuation_Occurred.Caused_by_Auxiliary_Steam_Regulating_Valve_Malfunction.Valve_Repaired_-26_Tested_-26_Proce…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000302/LER-1986-021, :on 861112,emergency Feedwater Sys Actuation Occurred.Caused by Auxiliary Steam Regulating Valve Malfunction.Valve Repaired & Tested & Procedures Revised.W/

LER-1987-008, :on 870127,violation of Limiting Condition for Operation Occurred During mark-up of Carbon Dioxide Fire Suppression Sys.Caused by Misinterpretation of Communication by Personnel.Signature for Actions Required
type: Subject
label: 05000410/LER-1987-008, :on 870127,violation of Limiting Condition for Operation Occurred During mark-up of Carbon Dioxide Fire Suppression Sys.Caused by Misinterpretation of Communication by Personnel.Signature for Actions Required
page: https://kanterella.com/05000410/LER-2D1987-2D008-2C_-3Aon_870127-2Cviolation_of_Limiting_Condition_for_Operation_Occurred_During_mark-2Dup_of_Carbon_Dioxide_Fire_Suppression_Sys.Caused_by_Misinterpret…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000410/LER-1987-008, :on 870127,violation of Limiting Condition for Operation Occurred During mark-up of Carbon Dioxide Fire Suppression Sys.Caused by Misinterpretation of Communication by Personnel.Signature for Actions Required

LER-1986-007-04, :on 861111,error Discovered in Surveillance Instruction (SI) 246 Which Could Lead to Tech Spec Violation.Caused by Procedural error.SI-246 Will Be Revised & Flow Transmitters Will Be Recalibr
type: Subject
label: 05000328/LER-1986-007-04, :on 861111,error Discovered in Surveillance Instruction (SI) 246 Which Could Lead to Tech Spec Violation.Caused by Procedural error.SI-246 Will Be Revised & Flow Transmitters Will Be Recalibr
page: https://kanterella.com/05000328/LER-2D1986-2D007-2D04-2C_-3Aon_861111-2Cerror_Discovered_in_Surveillance_Instruction_-28SI-29_246_Which_Could_Lead_to_Tech_Spec_Violation.Caused_by_Procedural_error.SI-…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000328/LER-1986-007-04, :on 861111,error Discovered in Surveillance Instruction (SI) 246 Which Could Lead to Tech Spec Violation.Caused by Procedural error.SI-246 Will Be Revised & Flow Transmitters Will Be Recalibr

LER-1987-003, :on 870122,radiation Monitor Alarmed Due to Contaminated Instrument & Controls (I&C) Technician.Caused by Health Physics Technician Improperly Downgrading Work Permit Requirements.I&C Technician Retrained
type: Subject
label: 05000382/LER-1987-003, :on 870122,radiation Monitor Alarmed Due to Contaminated Instrument & Controls (I&C) Technician.Caused by Health Physics Technician Improperly Downgrading Work Permit Requirements.I&C Technician Retrained
page: https://kanterella.com/05000382/LER-2D1987-2D003-2C_-3Aon_870122-2Cradiation_Monitor_Alarmed_Due_to_Contaminated_Instrument_-26_Controls_-28I-26C-29_Technician.Caused_by_Health_Physics_Technician_Impr…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000382/LER-1987-003, :on 870122,radiation Monitor Alarmed Due to Contaminated Instrument & Controls (I&C) Technician.Caused by Health Physics Technician Improperly Downgrading Work Permit Requirements.I&C Technician Retrained

LER-1987-004, :on 870113,discovered That Determination of Charcoal Adsorber Bank Efficiency by Technical Instruction TI-9 Performed Improperly.Caused by Personnel error.TI-9 Revised to Ensure Accurate Adsorber Efficiency
type: Subject
label: 05000327/LER-1987-004, :on 870113,discovered That Determination of Charcoal Adsorber Bank Efficiency by Technical Instruction TI-9 Performed Improperly.Caused by Personnel error.TI-9 Revised to Ensure Accurate Adsorber Efficiency
page: https://kanterella.com/05000327/LER-2D1987-2D004-2C_-3Aon_870113-2Cdiscovered_That_Determination_of_Charcoal_Adsorber_Bank_Efficiency_by_Technical_Instruction_TI-2D9_Performed_Improperly.Caused_by_Per…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000327/LER-1987-004, :on 870113,discovered That Determination of Charcoal Adsorber Bank Efficiency by Technical Instruction TI-9 Performed Improperly.Caused by Personnel error.TI-9 Revised to Ensure Accurate Adsorber Efficiency

LER-1986-025, :on 860918 & 19,control Rods P-6 & P-10 Dropped Into Core,Respectively & Reactor Manually Tripped.Caused by Failed Stationary Gripper Coil & Loose Female Connector Pin. Parts Replaced & Control Rods Tested
type: Subject
label: 05000280/LER-1986-025, :on 860918 & 19,control Rods P-6 & P-10 Dropped Into Core,Respectively & Reactor Manually Tripped.Caused by Failed Stationary Gripper Coil & Loose Female Connector Pin. Parts Replaced & Control Rods Tested
page: https://kanterella.com/05000280/LER-2D1986-2D025-2C_-3Aon_860918_-26_19-2Ccontrol_Rods_P-2D6_-26_P-2D10_Dropped_Into_Core-2CRespectively_-26_Reactor_Manually_Tripped.Caused_by_Failed_Stationary_Grippe…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000280/LER-1986-025, :on 860918 & 19,control Rods P-6 & P-10 Dropped Into Core,Respectively & Reactor Manually Tripped.Caused by Failed Stationary Gripper Coil & Loose Female Connector Pin. Parts Replaced & Control Rods Tested

O Control Room Approval.Personnel Counseled Re Fire Door Opening Procedures
type: Subject
label: 05000364/LER-1986-008-01, :on 860915,failure to Post Fire Watch Per Tech Spec 3.7.11.2 Discovered.Caused by Personnel Propping Open Fire Door W/O Control Room Approval.Personnel Counseled Re Fire Door Opening Procedures
page: https://kanterella.com/05000364/LER-2D1986-2D008-2D01-2C_-3Aon_860915-2Cfailure_to_Post_Fire_Watch_Per_Tech_Spec_3.7.11.2_Discovered.Caused_by_Personnel_Propping_Open_Fire_Door_W/O_Control_Room_Approv…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000364/LER-1986-008-01, :on 860915,failure to Post Fire Watch Per Tech Spec 3.7.11.2 Discovered.Caused by Personnel Propping Open Fire Door W/O Control Room Approval.Personnel Counseled Re Fire Door Opening Procedures

Sys Pressure Below Required Relief Setpoint.Caused by Incorrect Setup of Valve.Valve 1NC-1 Replaced & Valve 1NC-2 Adjusted
type: Subject
label: 05000369/LER-1986-016-03, :on 860902,RCS Pressurizer Code Safety Relief Valve 1NC-1 Lifted W/Sys Pressure Below Required Relief Setpoint.Caused by Incorrect Setup of Valve.Valve 1NC-1 Replaced & Valve 1NC-2 Adjusted
page: https://kanterella.com/05000369/LER-2D1986-2D016-2D03-2C_-3Aon_860902-2CRCS_Pressurizer_Code_Safety_Relief_Valve_1NC-2D1_Lifted_W/Sys_Pressure_Below_Required_Relief_Setpoint.Caused_by_Incorrect_Setup_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000369/LER-1986-016-03, :on 860902,RCS Pressurizer Code Safety Relief Valve 1NC-1 Lifted W/Sys Pressure Below Required Relief Setpoint.Caused by Incorrect Setup of Valve.Valve 1NC-1 Replaced & Valve 1NC-2 Adjusted

05000250/LER-1987-003, :on 870112,annunciator E 8/3 Generator Field Ground Alarmed.Caused by Turbine Plant Cooling Water Leak in Exciter Housing.Leaking Exciter Air Cooler Isolated & Drained
type: Subject
page: https://kanterella.com/05000250/LER-2D1987-2D003-2C_-3Aon_870112-2Cannunciator_E_8/3_Generator_Field_Ground_Alarmed.Caused_by_Turbine_Plant_Cooling_Water_Leak_in_Exciter_Housing.Leaking_Exciter_Air_Co…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000250/LER-1987-003, :on 870112,annunciator E 8/3 Generator Field Ground Alarmed.Caused by Turbine Plant Cooling Water Leak in Exciter Housing.Leaking Exciter Air Cooler Isolated & Drained

LER-1987-001-02, :on 870110,discovered That Fire Breach Permit Not Written When Damaged Kaowool Found.Caused by Personnel Error.Kaowool Moved Back Into Place & Clamp Used to Hold Fire Protection Matl in Place
type: Subject
label: 05000328/LER-1987-001-02, :on 870110,discovered That Fire Breach Permit Not Written When Damaged Kaowool Found.Caused by Personnel Error.Kaowool Moved Back Into Place & Clamp Used to Hold Fire Protection Matl in Place
page: https://kanterella.com/05000328/LER-2D1987-2D001-2D02-2C_-3Aon_870110-2Cdiscovered_That_Fire_Breach_Permit_Not_Written_When_Damaged_Kaowool_Found.Caused_by_Personnel_Error.Kaowool_Moved_Back_Into_Plac…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000328/LER-1987-001-02, :on 870110,discovered That Fire Breach Permit Not Written When Damaged Kaowool Found.Caused by Personnel Error.Kaowool Moved Back Into Place & Clamp Used to Hold Fire Protection Matl in Place

LER-1987-002, :on 870108,low Steamline Pressure Signal Occurred During Calibr Testing & ESF Actuation Initiated. Caused by Personnel Error.Improved Instrument Identification Tags & Procedural Enhancements Made
type: Subject
label: 05000482/LER-1987-002, :on 870108,low Steamline Pressure Signal Occurred During Calibr Testing & ESF Actuation Initiated. Caused by Personnel Error.Improved Instrument Identification Tags & Procedural Enhancements Made
page: https://kanterella.com/05000482/LER-2D1987-2D002-2C_-3Aon_870108-2Clow_Steamline_Pressure_Signal_Occurred_During_Calibr_Testing_-26_ESF_Actuation_Initiated._Caused_by_Personnel_Error.Improved_Instrume…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000482/LER-1987-002, :on 870108,low Steamline Pressure Signal Occurred During Calibr Testing & ESF Actuation Initiated. Caused by Personnel Error.Improved Instrument Identification Tags & Procedural Enhancements Made

LER-1986-006, :on 860409,discovered That One of four-inch Sample Lines to Header Completely Plugged.Caused by Pebbles Washed Off Reactor Bldg Into Roof Drains.Roof Drain Screens Will Be Installed
type: Subject
label: 05000220/LER-1986-006, :on 860409,discovered That One of four-inch Sample Lines to Header Completely Plugged.Caused by Pebbles Washed Off Reactor Bldg Into Roof Drains.Roof Drain Screens Will Be Installed
page: https://kanterella.com/05000220/LER-2D1986-2D006-2C_-3Aon_860409-2Cdiscovered_That_One_of_four-2Dinch_Sample_Lines_to_Header_Completely_Plugged.Caused_by_Pebbles_Washed_Off_Reactor_Bldg_Into_Roof_Drai…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000220/LER-1986-006, :on 860409,discovered That One of four-inch Sample Lines to Header Completely Plugged.Caused by Pebbles Washed Off Reactor Bldg Into Roof Drains.Roof Drain Screens Will Be Installed

LER-1986-005, :on 860227,HPCI Sys Declared Inoperable After Gasket Failure on Gland Steam Condenser.Caused by Condensate Leakage Through Condenser Top head-to-shell Joint Gasket. Condenser Repaired
type: Subject
label: 05000298/LER-1986-005, :on 860227,HPCI Sys Declared Inoperable After Gasket Failure on Gland Steam Condenser.Caused by Condensate Leakage Through Condenser Top head-to-shell Joint Gasket. Condenser Repaired
page: https://kanterella.com/05000298/LER-2D1986-2D005-2C_-3Aon_860227-2CHPCI_Sys_Declared_Inoperable_After_Gasket_Failure_on_Gland_Steam_Condenser.Caused_by_Condensate_Leakage_Through_Condenser_Top_head-2D…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000298/LER-1986-005, :on 860227,HPCI Sys Declared Inoperable After Gasket Failure on Gland Steam Condenser.Caused by Condensate Leakage Through Condenser Top head-to-shell Joint Gasket. Condenser Repaired

05000298/LER-1987-003, :on 870107,reactor Scram & Group Isolations Occurred Due to Low Reactor Vessel Level During Troubleshooting.Caused by Insufficient Acceptance Test. Terminal Connections Verified
type: Subject
page: https://kanterella.com/05000298/LER-2D1987-2D003-2C_-3Aon_870107-2Creactor_Scram_-26_Group_Isolations_Occurred_Due_to_Low_Reactor_Vessel_Level_During_Troubleshooting.Caused_by_Insufficient_Acceptance_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000298/LER-1987-003, :on 870107,reactor Scram & Group Isolations Occurred Due to Low Reactor Vessel Level During Troubleshooting.Caused by Insufficient Acceptance Test. Terminal Connections Verified

LER-1987-001, :on 870105,containment Atmosphere Particulate Radioactivity Monitor Discovered Inoperable Due to Improper Valve Alignment.Caused by Personnel Failure to Follow Procedures.Personnel Counseled
type: Subject
label: 05000348/LER-1987-001, :on 870105,containment Atmosphere Particulate Radioactivity Monitor Discovered Inoperable Due to Improper Valve Alignment.Caused by Personnel Failure to Follow Procedures.Personnel Counseled
page: https://kanterella.com/05000348/LER-2D1987-2D001-2C_-3Aon_870105-2Ccontainment_Atmosphere_Particulate_Radioactivity_Monitor_Discovered_Inoperable_Due_to_Improper_Valve_Alignment.Caused_by_Personnel_Fa…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000348/LER-1987-001, :on 870105,containment Atmosphere Particulate Radioactivity Monitor Discovered Inoperable Due to Improper Valve Alignment.Caused by Personnel Failure to Follow Procedures.Personnel Counseled

LER-1986-035, :on 860813,seismic Monitoring Sys Inoperable. Caused by Deficient Surveillance Test Procedures.Strong Motion Accelerometers Removed for Calibr & Test Procedures Revised to Meet Tech Specs
type: Subject
label: 05000346/LER-1986-035, :on 860813,seismic Monitoring Sys Inoperable. Caused by Deficient Surveillance Test Procedures.Strong Motion Accelerometers Removed for Calibr & Test Procedures Revised to Meet Tech Specs
page: https://kanterella.com/05000346/LER-2D1986-2D035-2C_-3Aon_860813-2Cseismic_Monitoring_Sys_Inoperable._Caused_by_Deficient_Surveillance_Test_Procedures.Strong_Motion_Accelerometers_Removed_for_Calibr_-…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000346/LER-1986-035, :on 860813,seismic Monitoring Sys Inoperable. Caused by Deficient Surveillance Test Procedures.Strong Motion Accelerometers Removed for Calibr & Test Procedures Revised to Meet Tech Specs

LER-1987-002, :on 870103,control Valve CV-3-739 Declared Out of Svc Due to Failed Solenoid Coil,Exceeding Tech Spec 3.3.3.Caused by Valve Being Left Out of Table 3.6-1.Failed Solenoid Replaced & Table 3.6-1 Revised
type: Subject
label: 05000250/LER-1987-002, :on 870103,control Valve CV-3-739 Declared Out of Svc Due to Failed Solenoid Coil,Exceeding Tech Spec 3.3.3.Caused by Valve Being Left Out of Table 3.6-1.Failed Solenoid Replaced & Table 3.6-1 Revised
page: https://kanterella.com/05000250/LER-2D1987-2D002-2C_-3Aon_870103-2Ccontrol_Valve_CV-2D3-2D739_Declared_Out_of_Svc_Due_to_Failed_Solenoid_Coil-2CExceeding_Tech_Spec_3.3.3.Caused_by_Valve_Being_Left_Out…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000250/LER-1987-002, :on 870103,control Valve CV-3-739 Declared Out of Svc Due to Failed Solenoid Coil,Exceeding Tech Spec 3.3.3.Caused by Valve Being Left Out of Table 3.6-1.Failed Solenoid Replaced & Table 3.6-1 Revised

LER-1987-001, :on 870104,auxiliary Feedwater Pump Actuation Occurred Following Attempt to Start Steam Generator Feedwater Pump 3B.Auto-start Logic of Feedwater Pump Checked for Malfunction.Starts to Be Monitored
type: Subject
label: 05000250/LER-1987-001, :on 870104,auxiliary Feedwater Pump Actuation Occurred Following Attempt to Start Steam Generator Feedwater Pump 3B.Auto-start Logic of Feedwater Pump Checked for Malfunction.Starts to Be Monitored
page: https://kanterella.com/05000250/LER-2D1987-2D001-2C_-3Aon_870104-2Cauxiliary_Feedwater_Pump_Actuation_Occurred_Following_Attempt_to_Start_Steam_Generator_Feedwater_Pump_3B.Auto-2Dstart_Logic_of_Feedwa…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000250/LER-1987-001, :on 870104,auxiliary Feedwater Pump Actuation Occurred Following Attempt to Start Steam Generator Feedwater Pump 3B.Auto-start Logic of Feedwater Pump Checked for Malfunction.Starts to Be Monitored

05000281/LER-1986-015-01, :on 861031,pressurizer Safety Valve Setpoints Found Outside Allowable Limits.Caused by Failure to Compensate for Operating Temp & Valve Wear.Valves Replaced & Setpoints Reset
type: Subject
page: https://kanterella.com/05000281/LER-2D1986-2D015-2D01-2C_-3Aon_861031-2Cpressurizer_Safety_Valve_Setpoints_Found_Outside_Allowable_Limits.Caused_by_Failure_to_Compensate_for_Operating_Temp_-26_Valve_W…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000281/LER-1986-015-01, :on 861031,pressurizer Safety Valve Setpoints Found Outside Allowable Limits.Caused by Failure to Compensate for Operating Temp & Valve Wear.Valves Replaced & Setpoints Reset

LER-1987-005, :on 870211,safety Injection Tank 1B Drained to Level Below Tech Spec Limits.Caused by Procedural Inadequacies Re Narrow Range Level Instrument Ref Leg. Procedures Will Be Revised
type: Subject
label: 05000382/LER-1987-005, :on 870211,safety Injection Tank 1B Drained to Level Below Tech Spec Limits.Caused by Procedural Inadequacies Re Narrow Range Level Instrument Ref Leg. Procedures Will Be Revised
page: https://kanterella.com/05000382/LER-2D1987-2D005-2C_-3Aon_870211-2Csafety_Injection_Tank_1B_Drained_to_Level_Below_Tech_Spec_Limits.Caused_by_Procedural_Inadequacies_Re_Narrow_Range_Level_Instrument_R…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000382/LER-1987-005, :on 870211,safety Injection Tank 1B Drained to Level Below Tech Spec Limits.Caused by Procedural Inadequacies Re Narrow Range Level Instrument Ref Leg. Procedures Will Be Revised

LER-1986-019-01, :on 861215,reactor Scram Signal on Scram Discharge Vol Received Following Preplanned Scram.Caused by Operator Failure to Adhere to Scram Recovery Procedure. Procedure Revised.Training Mod Recommended
type: Subject
label: 05000410/LER-1986-019-01, :on 861215,reactor Scram Signal on Scram Discharge Vol Received Following Preplanned Scram.Caused by Operator Failure to Adhere to Scram Recovery Procedure. Procedure Revised.Training Mod Recommended
page: https://kanterella.com/05000410/LER-2D1986-2D019-2D01-2C_-3Aon_861215-2Creactor_Scram_Signal_on_Scram_Discharge_Vol_Received_Following_Preplanned_Scram.Caused_by_Operator_Failure_to_Adhere_to_Scram_Re…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000410/LER-1986-019-01, :on 861215,reactor Scram Signal on Scram Discharge Vol Received Following Preplanned Scram.Caused by Operator Failure to Adhere to Scram Recovery Procedure. Procedure Revised.Training Mod Recommended

LER-1986-044, :on 861118,permanent Electrical Wire Erroneously Removed from Isolation Logic Circuit During Performance of Surveillance.Caused by Procedural Error. Procedure Revised to Delete Incorrect Step
type: Subject
label: 05000416/LER-1986-044, :on 861118,permanent Electrical Wire Erroneously Removed from Isolation Logic Circuit During Performance of Surveillance.Caused by Procedural Error. Procedure Revised to Delete Incorrect Step
page: https://kanterella.com/05000416/LER-2D1986-2D044-2C_-3Aon_861118-2Cpermanent_Electrical_Wire_Erroneously_Removed_from_Isolation_Logic_Circuit_During_Performance_of_Surveillance.Caused_by_Procedural_Er…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000416/LER-1986-044, :on 861118,permanent Electrical Wire Erroneously Removed from Isolation Logic Circuit During Performance of Surveillance.Caused by Procedural Error. Procedure Revised to Delete Incorrect Step

LER-1986-010-04, :on 861203,containment Phase B Isolation Occurred During Performance of Surveillance Procedure.Caused by Deficient Procedure.Procedures Re ESF Actuations During Testing Will Be Revised
type: Subject
label: 05000328/LER-1986-010-04, :on 861203,containment Phase B Isolation Occurred During Performance of Surveillance Procedure.Caused by Deficient Procedure.Procedures Re ESF Actuations During Testing Will Be Revised
page: https://kanterella.com/05000328/LER-2D1986-2D010-2D04-2C_-3Aon_861203-2Ccontainment_Phase_B_Isolation_Occurred_During_Performance_of_Surveillance_Procedure.Caused_by_Deficient_Procedure.Procedures_Re_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000328/LER-1986-010-04, :on 861203,containment Phase B Isolation Occurred During Performance of Surveillance Procedure.Caused by Deficient Procedure.Procedures Re ESF Actuations During Testing Will Be Revised

LER-1986-051-01, :on 861120,reactor Tripped on Turbine Trip Above 69- Reactor Power.Caused by Feedwater Pump Suction Flow Pressure Switch Being Out of Calibr.Work Request Initiated & Completed on Pressure Switch
type: Subject
label: 05000414/LER-1986-051-01, :on 861120,reactor Tripped on Turbine Trip Above 69% Reactor Power.Caused by Feedwater Pump Suction Flow Pressure Switch Being Out of Calibr.Work Request Initiated & Completed on Pressure Switch
page: https://kanterella.com/05000414/LER-2D1986-2D051-2D01-2C_-3Aon_861120-2Creactor_Tripped_on_Turbine_Trip_Above_69-_Reactor_Power.Caused_by_Feedwater_Pump_Suction_Flow_Pressure_Switch_Being_Out_of_Calib…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000414/LER-1986-051-01, :on 861120,reactor Tripped on Turbine Trip Above 69% Reactor Power.Caused by Feedwater Pump Suction Flow Pressure Switch Being Out of Calibr.Work Request Initiated & Completed on Pressure Switch

Installation Deficiency.Styrofoam Cell Spacers Installed
type: Subject
label: 05000269/LER-1986-009-02, :on 860610,discovered That Keowee Battery Racks Did Not Comply W/Seismic Design Requirements.Caused by Poor Communication & Design/Installation Deficiency.Styrofoam Cell Spacers Installed
page: https://kanterella.com/05000269/LER-2D1986-2D009-2D02-2C_-3Aon_860610-2Cdiscovered_That_Keowee_Battery_Racks_Did_Not_Comply_W/Seismic_Design_Requirements.Caused_by_Poor_Communication_-26_Design/Instal…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000269/LER-1986-009-02, :on 860610,discovered That Keowee Battery Racks Did Not Comply W/Seismic Design Requirements.Caused by Poor Communication & Design/Installation Deficiency.Styrofoam Cell Spacers Installed

05000281/LER-1986-019-01, :on 861201,individual Rod Position Indicators (Irpi) for Control Rods Out of Calibr.Caused by Instrument Drift.All Inoperable Irpis Recalibr & Returned to Svc
type: Subject
page: https://kanterella.com/05000281/LER-2D1986-2D019-2D01-2C_-3Aon_861201-2Cindividual_Rod_Position_Indicators_-28Irpi-29_for_Control_Rods_Out_of_Calibr.Caused_by_Instrument_Drift.All_Inoperable_Irpis_Rec…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000281/LER-1986-019-01, :on 861201,individual Rod Position Indicators (Irpi) for Control Rods Out of Calibr.Caused by Instrument Drift.All Inoperable Irpis Recalibr & Returned to Svc

LER-1986-003, :on 860603,turbine Runback Occurred Due to Loss of Power on Instrument Bus.Caused by Trip of White Inverter Output Breaker.Procedures for Placing Inverter on Line Will Be Revised by 860901
type: Subject
label: 05000301/LER-1986-003, :on 860603,turbine Runback Occurred Due to Loss of Power on Instrument Bus.Caused by Trip of White Inverter Output Breaker.Procedures for Placing Inverter on Line Will Be Revised by 860901
page: https://kanterella.com/05000301/LER-2D1986-2D003-2C_-3Aon_860603-2Cturbine_Runback_Occurred_Due_to_Loss_of_Power_on_Instrument_Bus.Caused_by_Trip_of_White_Inverter_Output_Breaker.Procedures_for_Placin…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000301/LER-1986-003, :on 860603,turbine Runback Occurred Due to Loss of Power on Instrument Bus.Caused by Trip of White Inverter Output Breaker.Procedures for Placing Inverter on Line Will Be Revised by 860901

05000382/LER-1987-009, :on 870317,discovered That Instrument Used to Determine Containment Internal Pressure Not Sufficiently Accurate.Caused by Design Deficiency.Calculational Methodology Substituted
type: Subject
page: https://kanterella.com/05000382/LER-2D1987-2D009-2C_-3Aon_870317-2Cdiscovered_That_Instrument_Used_to_Determine_Containment_Internal_Pressure_Not_Sufficiently_Accurate.Caused_by_Design_Deficiency.Calc…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000382/LER-1987-009, :on 870317,discovered That Instrument Used to Determine Containment Internal Pressure Not Sufficiently Accurate.Caused by Design Deficiency.Calculational Methodology Substituted

Mgt Controls & Procedures
type: Subject
label: 05000382/LER-1987-010, :on 870318,discovered That Retest of Pressurizer Surge Line PSL-203 Sample Header Inside Containment Isolation Valve Not Performed.Caused by Failure to Comply W/Mgt Controls & Procedures
page: https://kanterella.com/05000382/LER-2D1987-2D010-2C_-3Aon_870318-2Cdiscovered_That_Retest_of_Pressurizer_Surge_Line_PSL-2D203_Sample_Header_Inside_Containment_Isolation_Valve_Not_Performed.Caused_by_F…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000382/LER-1987-010, :on 870318,discovered That Retest of Pressurizer Surge Line PSL-203 Sample Header Inside Containment Isolation Valve Not Performed.Caused by Failure to Comply W/Mgt Controls & Procedures

LER-1987-017, :on 870306,surveillance Instruction Review Identified Potential Failure to Meet Min Boron Concentrations.Caused by Inadequate Administrative Controls & Analytical Technique.Instructions Revised
type: Subject
label: 05000327/LER-1987-017, :on 870306,surveillance Instruction Review Identified Potential Failure to Meet Min Boron Concentrations.Caused by Inadequate Administrative Controls & Analytical Technique.Instructions Revised
page: https://kanterella.com/05000327/LER-2D1987-2D017-2C_-3Aon_870306-2Csurveillance_Instruction_Review_Identified_Potential_Failure_to_Meet_Min_Boron_Concentrations.Caused_by_Inadequate_Administrative_Con…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000327/LER-1987-017, :on 870306,surveillance Instruction Review Identified Potential Failure to Meet Min Boron Concentrations.Caused by Inadequate Administrative Controls & Analytical Technique.Instructions Revised

LER-1986-005-01, :on 860523,turbine Trip Occurred During Monthly Surveillance Test 3PT-M12.Caused by Failed Relay in Turbine Independent Electrical Overspeed Protection Sys (Ieops). Relay Replaced & Similar Ieops Relays Tested
type: Subject
label: 05000286/LER-1986-005-01, :on 860523,turbine Trip Occurred During Monthly Surveillance Test 3PT-M12.Caused by Failed Relay in Turbine Independent Electrical Overspeed Protection Sys (Ieops). Relay Replaced & Similar Ieops Relays Tested
page: https://kanterella.com/05000286/LER-2D1986-2D005-2D01-2C_-3Aon_860523-2Cturbine_Trip_Occurred_During_Monthly_Surveillance_Test_3PT-2DM12.Caused_by_Failed_Relay_in_Turbine_Independent_Electrical_Oversp…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000286/LER-1986-005-01, :on 860523,turbine Trip Occurred During Monthly Surveillance Test 3PT-M12.Caused by Failed Relay in Turbine Independent Electrical Overspeed Protection Sys (Ieops). Relay Replaced & Similar Ieops Relays Tested

LER-1987-007, :on 870304,Train a Reactor Trip Breaker Inadvertently Tripped.Caused by Personnel Error.All Shifts Informed of Event to Ensure Added Caution During Future Performance of Surveillance
type: Subject
label: 05000443/LER-1987-007, :on 870304,Train a Reactor Trip Breaker Inadvertently Tripped.Caused by Personnel Error.All Shifts Informed of Event to Ensure Added Caution During Future Performance of Surveillance
page: https://kanterella.com/05000443/LER-2D1987-2D007-2C_-3Aon_870304-2CTrain_a_Reactor_Trip_Breaker_Inadvertently_Tripped.Caused_by_Personnel_Error.All_Shifts_Informed_of_Event_to_Ensure_Added_Caution_Dur…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000443/LER-1987-007, :on 870304,Train a Reactor Trip Breaker Inadvertently Tripped.Caused by Personnel Error.All Shifts Informed of Event to Ensure Added Caution During Future Performance of Surveillance

LER-1987-003, :on 870310,weekly Surveillance Not Performed on Diesel Fire Pump Starting Battery as Required by Tech Spec 4.7.9.1.3.Caused by Personnel Error.Event Discussed & Emphasis Placed on Timely Completion of Tests
type: Subject
label: 05000395/LER-1987-003, :on 870310,weekly Surveillance Not Performed on Diesel Fire Pump Starting Battery as Required by Tech Spec 4.7.9.1.3.Caused by Personnel Error.Event Discussed & Emphasis Placed on Timely Completion of Tests
page: https://kanterella.com/05000395/LER-2D1987-2D003-2C_-3Aon_870310-2Cweekly_Surveillance_Not_Performed_on_Diesel_Fire_Pump_Starting_Battery_as_Required_by_Tech_Spec_4.7.9.1.3.Caused_by_Personnel_Error.E…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000395/LER-1987-003, :on 870310,weekly Surveillance Not Performed on Diesel Fire Pump Starting Battery as Required by Tech Spec 4.7.9.1.3.Caused by Personnel Error.Event Discussed & Emphasis Placed on Timely Completion of Tests

05000364/LER-1987-001-01, :on 870228,reactor Tripped.Caused by Spike on Channel 1 of Over temp-delta-t While Channel 3 in Test. Investigation Into Cause of 7300 Series lead-lag Cards Continuing
type: Subject
page: https://kanterella.com/05000364/LER-2D1987-2D001-2D01-2C_-3Aon_870228-2Creactor_Tripped.Caused_by_Spike_on_Channel_1_of_Over_temp-2Ddelta-2Dt_While_Channel_3_in_Test._Investigation_Into_Cause_of_7300_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000364/LER-1987-001-01, :on 870228,reactor Tripped.Caused by Spike on Channel 1 of Over temp-delta-t While Channel 3 in Test. Investigation Into Cause of 7300 Series lead-lag Cards Continuing

LER-1986-012, :on 861128 & 29,series of Related Automatic Initiations of Standby Gas Treatment Sys Occurred.Caused by Clogged Filters & Personnel Error.Approx 50- of First Stage Filters Replaced & Training Mod Initiated
type: Subject
label: 05000410/LER-1986-012, :on 861128 & 29,series of Related Automatic Initiations of Standby Gas Treatment Sys Occurred.Caused by Clogged Filters & Personnel Error.Approx 50% of First Stage Filters Replaced & Training Mod Initiated
page: https://kanterella.com/05000410/LER-2D1986-2D012-2C_-3Aon_861128_-26_29-2Cseries_of_Related_Automatic_Initiations_of_Standby_Gas_Treatment_Sys_Occurred.Caused_by_Clogged_Filters_-26_Personnel_Error.Ap…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000410/LER-1986-012, :on 861128 & 29,series of Related Automatic Initiations of Standby Gas Treatment Sys Occurred.Caused by Clogged Filters & Personnel Error.Approx 50% of First Stage Filters Replaced & Training Mod Initiated

LER-1986-032-01, :on 860708,main Feedwater Isolation Occurred Due to hi-hi Level in Steam Generator C.Caused by Leaking Control Valves.Cf Isolation Signal Reset.Main Feedwater Pump Turbine Started
type: Subject
label: 05000414/LER-1986-032-01, :on 860708,main Feedwater Isolation Occurred Due to hi-hi Level in Steam Generator C.Caused by Leaking Control Valves.Cf Isolation Signal Reset.Main Feedwater Pump Turbine Started
page: https://kanterella.com/05000414/LER-2D1986-2D032-2D01-2C_-3Aon_860708-2Cmain_Feedwater_Isolation_Occurred_Due_to_hi-2Dhi_Level_in_Steam_Generator_C.Caused_by_Leaking_Control_Valves.Cf_Isolation_Signal…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000414/LER-1986-032-01, :on 860708,main Feedwater Isolation Occurred Due to hi-hi Level in Steam Generator C.Caused by Leaking Control Valves.Cf Isolation Signal Reset.Main Feedwater Pump Turbine Started

LER-1986-029, :on 850118,ERCW Pump K-A Failed to Meet Acceptance Criteria as Determined by Measured Total Flow Rate & Appropriate Baseline Curve.Caused by Personnel Error. Operating Procedures Will Be Revised
type: Subject
label: 05000327/LER-1986-029, :on 850118,ERCW Pump K-A Failed to Meet Acceptance Criteria as Determined by Measured Total Flow Rate & Appropriate Baseline Curve.Caused by Personnel Error. Operating Procedures Will Be Revised
page: https://kanterella.com/05000327/LER-2D1986-2D029-2C_-3Aon_850118-2CERCW_Pump_K-2DA_Failed_to_Meet_Acceptance_Criteria_as_Determined_by_Measured_Total_Flow_Rate_-26_Appropriate_Baseline_Curve.Caused_by…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000327/LER-1986-029, :on 850118,ERCW Pump K-A Failed to Meet Acceptance Criteria as Determined by Measured Total Flow Rate & Appropriate Baseline Curve.Caused by Personnel Error. Operating Procedures Will Be Revised

05000413/LER-1985-020, :on 850314,reactor Trip Occurred Due to Power Range High Flux Rate Signal.Caused by Loose Detector Cable Inside Power Range Cabinets.Work Request Initiated to Repair Loose Cable
type: Subject
page: https://kanterella.com/05000413/LER-2D1985-2D020-2C_-3Aon_850314-2Creactor_Trip_Occurred_Due_to_Power_Range_High_Flux_Rate_Signal.Caused_by_Loose_Detector_Cable_Inside_Power_Range_Cabinets.Work_Reques…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000413/LER-1985-020, :on 850314,reactor Trip Occurred Due to Power Range High Flux Rate Signal.Caused by Loose Detector Cable Inside Power Range Cabinets.Work Request Initiated to Repair Loose Cable

Asme Section XI Accuracy & Range Requirements for Instruments Used for Pump Testing.Caused by Personnel Error.Instruments Calibr to Required Accuracy
type: Subject
label: 05000327/LER-1986-028, :on 860702,discovered Failure to Comply W/Asme Section XI Accuracy & Range Requirements for Instruments Used for Pump Testing.Caused by Personnel Error.Instruments Calibr to Required Accuracy
page: https://kanterella.com/05000327/LER-2D1986-2D028-2C_-3Aon_860702-2Cdiscovered_Failure_to_Comply_W/Asme_Section_XI_Accuracy_-26_Range_Requirements_for_Instruments_Used_for_Pump_Testing.Caused_by_Person…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000327/LER-1986-028, :on 860702,discovered Failure to Comply W/Asme Section XI Accuracy & Range Requirements for Instruments Used for Pump Testing.Caused by Personnel Error.Instruments Calibr to Required Accuracy

LER-1987-002, :on 870225,roving Fire Watch Patrol Inadvertently Established in Room IB-412-04 in Lieu of Room IB-412-14.Caused by Personnel Error.Face to Face Communications Between Personnel Required
type: Subject
label: 05000395/LER-1987-002, :on 870225,roving Fire Watch Patrol Inadvertently Established in Room IB-412-04 in Lieu of Room IB-412-14.Caused by Personnel Error.Face to Face Communications Between Personnel Required
page: https://kanterella.com/05000395/LER-2D1987-2D002-2C_-3Aon_870225-2Croving_Fire_Watch_Patrol_Inadvertently_Established_in_Room_IB-2D412-2D04_in_Lieu_of_Room_IB-2D412-2D14.Caused_by_Personnel_Error.Face…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000395/LER-1987-002, :on 870225,roving Fire Watch Patrol Inadvertently Established in Room IB-412-04 in Lieu of Room IB-412-14.Caused by Personnel Error.Face to Face Communications Between Personnel Required

Disconnect Switch. Switch Reclosed
type: Subject
label: 05000327/LER-1986-009-01, :on 860404,auxiliary Bldg Ventilation Isolation Occurred Due to Loss of Power to Radiation Monitor (RM)-90-101.Caused by Craftsman Contact W/Disconnect Switch. Switch Reclosed
page: https://kanterella.com/05000327/LER-2D1986-2D009-2D01-2C_-3Aon_860404-2Cauxiliary_Bldg_Ventilation_Isolation_Occurred_Due_to_Loss_of_Power_to_Radiation_Monitor_-28RM-29-2D90-2D101.Caused_by_Craftsman_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000327/LER-1986-009-01, :on 860404,auxiliary Bldg Ventilation Isolation Occurred Due to Loss of Power to Radiation Monitor (RM)-90-101.Caused by Craftsman Contact W/Disconnect Switch. Switch Reclosed

Responsible Individual
type: Subject
label: 05000249/LER-1986-003-08, :on 860403,power Lost to 4 Kv Emergency Bus 34-1 Resulting in Reactor Bldg Ventilation Sys Isolation. Caused by Personnel Leaving Relay Trip Check Open.Event Reviewed W/Responsible Individual
page: https://kanterella.com/05000249/LER-2D1986-2D003-2D08-2C_-3Aon_860403-2Cpower_Lost_to_4_Kv_Emergency_Bus_34-2D1_Resulting_in_Reactor_Bldg_Ventilation_Sys_Isolation._Caused_by_Personnel_Leaving_Relay_T…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000249/LER-1986-003-08, :on 860403,power Lost to 4 Kv Emergency Bus 34-1 Resulting in Reactor Bldg Ventilation Sys Isolation. Caused by Personnel Leaving Relay Trip Check Open.Event Reviewed W/Responsible Individual

O Emergency Power Supply,Resulting in No Operable Boration Flow Path.Caused by Personnel Error. Incident Will Be Reviewed During Staff Meeting
type: Subject
label: 05000370/LER-1986-006-02, :on 860329,chemical & Vol Control Charging Pump 2A Racked in Svc W/O Emergency Power Supply,Resulting in No Operable Boration Flow Path.Caused by Personnel Error. Incident Will Be Reviewed During Staff Meeting
page: https://kanterella.com/05000370/LER-2D1986-2D006-2D02-2C_-3Aon_860329-2Cchemical_-26_Vol_Control_Charging_Pump_2A_Racked_in_Svc_W/O_Emergency_Power_Supply-2CResulting_in_No_Operable_Boration_Flow_Path…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000370/LER-1986-006-02, :on 860329,chemical & Vol Control Charging Pump 2A Racked in Svc W/O Emergency Power Supply,Resulting in No Operable Boration Flow Path.Caused by Personnel Error. Incident Will Be Reviewed During Staff Meeting

LER-1986-054, :on 860902,07,11,13,15 & 19,RCIC Isolations Occurred.Caused by Instrument Isolation Valve Failure & Impulse Line Slope Problems,Leak Detection Response Time & Personnel Error.Valves Repaired or Replaced
type: Subject
label: 05000440/LER-1986-054, :on 860902,07,11,13,15 & 19,RCIC Isolations Occurred.Caused by Instrument Isolation Valve Failure & Impulse Line Slope Problems,Leak Detection Response Time & Personnel Error.Valves Repaired or Replaced
page: https://kanterella.com/05000440/LER-2D1986-2D054-2C_-3Aon_860902-2C07-2C11-2C13-2C15_-26_19-2CRCIC_Isolations_Occurred.Caused_by_Instrument_Isolation_Valve_Failure_-26_Impulse_Line_Slope_Problems-2CLe…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000440/LER-1986-054, :on 860902,07,11,13,15 & 19,RCIC Isolations Occurred.Caused by Instrument Isolation Valve Failure & Impulse Line Slope Problems,Leak Detection Response Time & Personnel Error.Valves Repaired or Replaced

LER-1986-033, :on 860729,determined That Some Blowout Panels in Shield Bldg Wall Would No Longer Withstand Differential Pressure During Loca.Caused by Inadequate Technical Review of Panel Design Functions.Panel Revised
type: Subject
label: 05000346/LER-1986-033, :on 860729,determined That Some Blowout Panels in Shield Bldg Wall Would No Longer Withstand Differential Pressure During Loca.Caused by Inadequate Technical Review of Panel Design Functions.Panel Revised
page: https://kanterella.com/05000346/LER-2D1986-2D033-2C_-3Aon_860729-2Cdetermined_That_Some_Blowout_Panels_in_Shield_Bldg_Wall_Would_No_Longer_Withstand_Differential_Pressure_During_Loca.Caused_by_Inadequ…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000346/LER-1986-033, :on 860729,determined That Some Blowout Panels in Shield Bldg Wall Would No Longer Withstand Differential Pressure During Loca.Caused by Inadequate Technical Review of Panel Design Functions.Panel Revised

LER-1986-010-01, :on 860326,isolation Condenser Condensate Return Valve 1-IC-3 Failed to Open During Surveillance Testing.Caused by Motor Operator Torque Switch Trip. Operating Procedure Revised
type: Subject
label: 05000245/LER-1986-010-01, :on 860326,isolation Condenser Condensate Return Valve 1-IC-3 Failed to Open During Surveillance Testing.Caused by Motor Operator Torque Switch Trip. Operating Procedure Revised
page: https://kanterella.com/05000245/LER-2D1986-2D010-2D01-2C_-3Aon_860326-2Cisolation_Condenser_Condensate_Return_Valve_1-2DIC-2D3_Failed_to_Open_During_Surveillance_Testing.Caused_by_Motor_Operator_Torqu…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000245/LER-1986-010-01, :on 860326,isolation Condenser Condensate Return Valve 1-IC-3 Failed to Open During Surveillance Testing.Caused by Motor Operator Torque Switch Trip. Operating Procedure Revised

05000270/LER-1986-003-05, :on 860602,core Flood Tank 2B Boron Concentration Fell Below Tech Spec Min of 1,828 Ppm.Cause Undetermined.Tank 2B Continuously Fed & Bled to Raise Boron Concentration
type: Subject
page: https://kanterella.com/05000270/LER-2D1986-2D003-2D05-2C_-3Aon_860602-2Ccore_Flood_Tank_2B_Boron_Concentration_Fell_Below_Tech_Spec_Min_of_1-2C828_Ppm.Cause_Undetermined.Tank_2B_Continuously_Fed_-26_B…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000270/LER-1986-003-05, :on 860602,core Flood Tank 2B Boron Concentration Fell Below Tech Spec Min of 1,828 Ppm.Cause Undetermined.Tank 2B Continuously Fed & Bled to Raise Boron Concentration

LER-1986-025, :on 860701,review of Tech Spec 3.3.3.8 Revealed Four Differences Between Installed Fire Detection Zones & Operability Requirements.Caused by Personnel Error.Fire Watch Established
type: Subject
label: 05000346/LER-1986-025, :on 860701,review of Tech Spec 3.3.3.8 Revealed Four Differences Between Installed Fire Detection Zones & Operability Requirements.Caused by Personnel Error.Fire Watch Established
page: https://kanterella.com/05000346/LER-2D1986-2D025-2C_-3Aon_860701-2Creview_of_Tech_Spec_3.3.3.8_Revealed_Four_Differences_Between_Installed_Fire_Detection_Zones_-26_Operability_Requirements.Caused_by_P…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000346/LER-1986-025, :on 860701,review of Tech Spec 3.3.3.8 Revealed Four Differences Between Installed Fire Detection Zones & Operability Requirements.Caused by Personnel Error.Fire Watch Established

LER-1998-003, :on 980113,damage Was Found on Stanchion & Restraining Steel of Unit 1 LPSI Sys Pipe Support Location on Common Discharge Line.Caused by LPSI Pump Discharge Check Valve Slam(S).Pipe Support Was Removed
type: Subject
label: 05000317/LER-1998-003, :on 980113,damage Was Found on Stanchion & Restraining Steel of Unit 1 LPSI Sys Pipe Support Location on Common Discharge Line.Caused by LPSI Pump Discharge Check Valve Slam(S).Pipe Support Was Removed
page: https://kanterella.com/05000317/LER-2D1998-2D003-2C_-3Aon_980113-2Cdamage_Was_Found_on_Stanchion_-26_Restraining_Steel_of_Unit_1_LPSI_Sys_Pipe_Support_Location_on_Common_Discharge_Line.Caused_by_LPSI_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000317/LER-1998-003, :on 980113,damage Was Found on Stanchion & Restraining Steel of Unit 1 LPSI Sys Pipe Support Location on Common Discharge Line.Caused by LPSI Pump Discharge Check Valve Slam(S).Pipe Support Was Removed

05000414/LER-1986-021-01, :on 860530,main Feedwater Isolation Occurred During Testing of Auxiliary Safeguards Relays.Cause Undetermined.Isolation Signal Reset & Control Valves Realigned
type: Subject
page: https://kanterella.com/05000414/LER-2D1986-2D021-2D01-2C_-3Aon_860530-2Cmain_Feedwater_Isolation_Occurred_During_Testing_of_Auxiliary_Safeguards_Relays.Cause_Undetermined.Isolation_Signal_Reset_-26_Co…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000414/LER-1986-021-01, :on 860530,main Feedwater Isolation Occurred During Testing of Auxiliary Safeguards Relays.Cause Undetermined.Isolation Signal Reset & Control Valves Realigned

09A Begun
type: Subject
label: 05000413/LER-1986-027, :on 860519,automatic Nuclear Svc Water Sys Alignment to Standby Nuclear Svc Water Pond Actuated. Caused by Defective Procedures.Procedure Change 15 to Encls 13.12 & 13.14 of PT/2/A/4200/09A Begun
page: https://kanterella.com/05000413/LER-2D1986-2D027-2C_-3Aon_860519-2Cautomatic_Nuclear_Svc_Water_Sys_Alignment_to_Standby_Nuclear_Svc_Water_Pond_Actuated._Caused_by_Defective_Procedures.Procedure_Change…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000413/LER-1986-027, :on 860519,automatic Nuclear Svc Water Sys Alignment to Standby Nuclear Svc Water Pond Actuated. Caused by Defective Procedures.Procedure Change 15 to Encls 13.12 & 13.14 of PT/2/A/4200/09A Begun

LER-1986-007-07, :on 860501,two Containment Atmosphere Monitoring Lines Did Not Meet NUREG-0661 Criteria.Caused by Lack of Design Document Control During Mod.Monthly Status Rept Will Be Mailed to Each Ae
type: Subject
label: 05000237/LER-1986-007-07, :on 860501,two Containment Atmosphere Monitoring Lines Did Not Meet NUREG-0661 Criteria.Caused by Lack of Design Document Control During Mod.Monthly Status Rept Will Be Mailed to Each Ae
page: https://kanterella.com/05000237/LER-2D1986-2D007-2D07-2C_-3Aon_860501-2Ctwo_Containment_Atmosphere_Monitoring_Lines_Did_Not_Meet_NUREG-2D0661_Criteria.Caused_by_Lack_of_Design_Document_Control_During_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000237/LER-1986-007-07, :on 860501,two Containment Atmosphere Monitoring Lines Did Not Meet NUREG-0661 Criteria.Caused by Lack of Design Document Control During Mod.Monthly Status Rept Will Be Mailed to Each Ae

LER-1986-053, :on 860927,nuclear Svc Water Sys (Nsws) Automatically Aligned to Standby Nuclear Svc Water Pond Due to auto-start Signal for Nsws Pumps.Caused by Personnel Error.Nsws Sys Realigned & Personnel Counseled
type: Subject
label: 05000413/LER-1986-053, :on 860927,nuclear Svc Water Sys (Nsws) Automatically Aligned to Standby Nuclear Svc Water Pond Due to auto-start Signal for Nsws Pumps.Caused by Personnel Error.Nsws Sys Realigned & Personnel Counseled
page: https://kanterella.com/05000413/LER-2D1986-2D053-2C_-3Aon_860927-2Cnuclear_Svc_Water_Sys_-28Nsws-29_Automatically_Aligned_to_Standby_Nuclear_Svc_Water_Pond_Due_to_auto-2Dstart_Signal_for_Nsws_Pumps.Ca…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000413/LER-1986-053, :on 860927,nuclear Svc Water Sys (Nsws) Automatically Aligned to Standby Nuclear Svc Water Pond Due to auto-start Signal for Nsws Pumps.Caused by Personnel Error.Nsws Sys Realigned & Personnel Counseled

Larger Mesh Strainer
type: Subject
label: 05000382/LER-1988-002, :on 880126,reactor Manually Tripped When Reactor Coolant Pump Upper Thrust Bearing Overheated.Caused by Clogged Lube Oil Strainer.Small Mesh Strainer Replaced W/Larger Mesh Strainer
page: https://kanterella.com/05000382/LER-2D1988-2D002-2C_-3Aon_880126-2Creactor_Manually_Tripped_When_Reactor_Coolant_Pump_Upper_Thrust_Bearing_Overheated.Caused_by_Clogged_Lube_Oil_Strainer.Small_Mesh_Str…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000382/LER-1988-002, :on 880126,reactor Manually Tripped When Reactor Coolant Pump Upper Thrust Bearing Overheated.Caused by Clogged Lube Oil Strainer.Small Mesh Strainer Replaced W/Larger Mesh Strainer

LER-1986-008, :on 860422,reactor Bldg Emergency Ventilation Sys Initiated Due to Undervoltage Condition on Instrument & Control Bus 30.Caused by Loss of Backfeed from Plant Switchyard.Investigation Continuing
type: Subject
label: 05000220/LER-1986-008, :on 860422,reactor Bldg Emergency Ventilation Sys Initiated Due to Undervoltage Condition on Instrument & Control Bus 30.Caused by Loss of Backfeed from Plant Switchyard.Investigation Continuing
page: https://kanterella.com/05000220/LER-2D1986-2D008-2C_-3Aon_860422-2Creactor_Bldg_Emergency_Ventilation_Sys_Initiated_Due_to_Undervoltage_Condition_on_Instrument_-26_Control_Bus_30.Caused_by_Loss_of_Bac…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000220/LER-1986-008, :on 860422,reactor Bldg Emergency Ventilation Sys Initiated Due to Undervoltage Condition on Instrument & Control Bus 30.Caused by Loss of Backfeed from Plant Switchyard.Investigation Continuing

LER-1988-001-02, :on 880316,CRD Breaker Failed Undervoltage Trip Test.Caused by Undervoltage Trip Paddle Lodged Over Armature Disk.Breaker Replaced.Maint Procedures Will Be Revised to Provide Direction for Verifying Dimensions
type: Subject
label: 05000289/LER-1988-001-02, :on 880316,CRD Breaker Failed Undervoltage Trip Test.Caused by Undervoltage Trip Paddle Lodged Over Armature Disk.Breaker Replaced.Maint Procedures Will Be Revised to Provide Direction for Verifying Dimensions
page: https://kanterella.com/05000289/LER-2D1988-2D001-2D02-2C_-3Aon_880316-2CCRD_Breaker_Failed_Undervoltage_Trip_Test.Caused_by_Undervoltage_Trip_Paddle_Lodged_Over_Armature_Disk.Breaker_Replaced.Maint_Pr…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000289/LER-1988-001-02, :on 880316,CRD Breaker Failed Undervoltage Trip Test.Caused by Undervoltage Trip Paddle Lodged Over Armature Disk.Breaker Replaced.Maint Procedures Will Be Revised to Provide Direction for Verifying Dimensions

LER-1988-011, :on 880418,Group 6 Isolation Occurred While Performing Maint on 24 Volt Dc Battery.Caused by Miscommunication of Clearance Order Requirements & Actual Work to Be Performed on Batteries.Bus Restored
type: Subject
label: 05000298/LER-1988-011, :on 880418,Group 6 Isolation Occurred While Performing Maint on 24 Volt Dc Battery.Caused by Miscommunication of Clearance Order Requirements & Actual Work to Be Performed on Batteries.Bus Restored
page: https://kanterella.com/05000298/LER-2D1988-2D011-2C_-3Aon_880418-2CGroup_6_Isolation_Occurred_While_Performing_Maint_on_24_Volt_Dc_Battery.Caused_by_Miscommunication_of_Clearance_Order_Requirements_-2…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000298/LER-1988-011, :on 880418,Group 6 Isolation Occurred While Performing Maint on 24 Volt Dc Battery.Caused by Miscommunication of Clearance Order Requirements & Actual Work to Be Performed on Batteries.Bus Restored

LER-1986-004-01, :on 860129,cumulative Offsite Dose from Liquid & Gaseous Effluents Periodic Test Not Performed.Caused by Personnel Error.Program Implemented to Ensure That Staff Members Receive Weekly Periodic Test Schedule
type: Subject
label: 05000369/LER-1986-004-01, :on 860129,cumulative Offsite Dose from Liquid & Gaseous Effluents Periodic Test Not Performed.Caused by Personnel Error.Program Implemented to Ensure That Staff Members Receive Weekly Periodic Test Schedule
page: https://kanterella.com/05000369/LER-2D1986-2D004-2D01-2C_-3Aon_860129-2Ccumulative_Offsite_Dose_from_Liquid_-26_Gaseous_Effluents_Periodic_Test_Not_Performed.Caused_by_Personnel_Error.Program_Implemen…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000369/LER-1986-004-01, :on 860129,cumulative Offsite Dose from Liquid & Gaseous Effluents Periodic Test Not Performed.Caused by Personnel Error.Program Implemented to Ensure That Staff Members Receive Weekly Periodic Test Schedule

LER-1988-010, :on 880411,determined That Individually Neither of Control Room Pressurization Units Able to Maintain Required Pressure of at Least 0.125 Inches Water Gauge. Caused by Open Penetrations
type: Subject
label: 05000348/LER-1988-010, :on 880411,determined That Individually Neither of Control Room Pressurization Units Able to Maintain Required Pressure of at Least 0.125 Inches Water Gauge. Caused by Open Penetrations
page: https://kanterella.com/05000348/LER-2D1988-2D010-2C_-3Aon_880411-2Cdetermined_That_Individually_Neither_of_Control_Room_Pressurization_Units_Able_to_Maintain_Required_Pressure_of_at_Least_0.125_Inches…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000348/LER-1988-010, :on 880411,determined That Individually Neither of Control Room Pressurization Units Able to Maintain Required Pressure of at Least 0.125 Inches Water Gauge. Caused by Open Penetrations

LER-1987-001-03, :on 880408,actuation of Primary Containment Isolation Sys Occurred During Switching of 4 Kv Emergency Bus Feed.Caused by Lack of Procedural Guidance & Training for Operators.Training Bulletin Issued
type: Subject
label: 05000278/LER-1987-001-03, :on 880408,actuation of Primary Containment Isolation Sys Occurred During Switching of 4 Kv Emergency Bus Feed.Caused by Lack of Procedural Guidance & Training for Operators.Training Bulletin Issued
page: https://kanterella.com/05000278/LER-2D1987-2D001-2D03-2C_-3Aon_880408-2Cactuation_of_Primary_Containment_Isolation_Sys_Occurred_During_Switching_of_4_Kv_Emergency_Bus_Feed.Caused_by_Lack_of_Procedural…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000278/LER-1987-001-03, :on 880408,actuation of Primary Containment Isolation Sys Occurred During Switching of 4 Kv Emergency Bus Feed.Caused by Lack of Procedural Guidance & Training for Operators.Training Bulletin Issued

LER-1985-005-01, :on 851230,12 Boot Seal Seams Determined to Have Inadequate Overlap.Caused by Inadequate Procedure. Procedure MP 1700.29, Fabrication Installation of Flexible Pressure & Fire Seals Generated
type: Subject
label: 05000346/LER-1985-005-01, :on 851230,12 Boot Seal Seams Determined to Have Inadequate Overlap.Caused by Inadequate Procedure. Procedure MP 1700.29, Fabrication Installation of Flexible Pressure & Fire Seals Generated
page: https://kanterella.com/05000346/LER-2D1985-2D005-2D01-2C_-3Aon_851230-2C12_Boot_Seal_Seams_Determined_to_Have_Inadequate_Overlap.Caused_by_Inadequate_Procedure._Procedure_MP_1700.29-2C_Fabrication_Ins…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000346/LER-1985-005-01, :on 851230,12 Boot Seal Seams Determined to Have Inadequate Overlap.Caused by Inadequate Procedure. Procedure MP 1700.29, Fabrication Installation of Flexible Pressure & Fire Seals Generated

05000366/LER-1988-009, :on 880321,local Leak Rate Test Missed Resulting in Condition Prohibited by Tech Specs.Caused by Personnel Error.Test Performed & Penetrations Declared Operable
type: Subject
page: https://kanterella.com/05000366/LER-2D1988-2D009-2C_-3Aon_880321-2Clocal_Leak_Rate_Test_Missed_Resulting_in_Condition_Prohibited_by_Tech_Specs.Caused_by_Personnel_Error.Test_Performed_-26_Penetrations…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000366/LER-1988-009, :on 880321,local Leak Rate Test Missed Resulting in Condition Prohibited by Tech Specs.Caused by Personnel Error.Test Performed & Penetrations Declared Operable

Reactor Trip Occurred. Caused by Electrohydraulic Fluid Control Sys Malfunction. Servo Control Valves for Four Governor Valves Replaced & Tested Satisfactorily
type: Subject
label: 05000338/LER-1988-013, :on 880319,turbine Trip/Reactor Trip Occurred. Caused by Electrohydraulic Fluid Control Sys Malfunction. Servo Control Valves for Four Governor Valves Replaced & Tested Satisfactorily
page: https://kanterella.com/05000338/LER-2D1988-2D013-2C_-3Aon_880319-2Cturbine_Trip/Reactor_Trip_Occurred._Caused_by_Electrohydraulic_Fluid_Control_Sys_Malfunction._Servo_Control_Valves_for_Four_Governor_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000338/LER-1988-013, :on 880319,turbine Trip/Reactor Trip Occurred. Caused by Electrohydraulic Fluid Control Sys Malfunction. Servo Control Valves for Four Governor Valves Replaced & Tested Satisfactorily

LER-1988-005-01, :on 880612,reactor Trip Occurred on Generated lo-lo Steam Generator Level Received from Steam Generator 32.Caused by Failure of Smoothing Orifice Relief Device in Westinghouse Main Turbine.Orifice Repaired
type: Subject
label: 05000285/LER-1988-005-01, :on 880612,reactor Trip Occurred on Generated lo-lo Steam Generator Level Received from Steam Generator 32.Caused by Failure of Smoothing Orifice Relief Device in Westinghouse Main Turbine.Orifice Repaired
page: https://kanterella.com/05000285/LER-2D1988-2D005-2D01-2C_-3Aon_880612-2Creactor_Trip_Occurred_on_Generated_lo-2Dlo_Steam_Generator_Level_Received_from_Steam_Generator_32.Caused_by_Failure_of_Smoothing…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000285/LER-1988-005-01, :on 880612,reactor Trip Occurred on Generated lo-lo Steam Generator Level Received from Steam Generator 32.Caused by Failure of Smoothing Orifice Relief Device in Westinghouse Main Turbine.Orifice Repaired

LER-1988-007, :on 880214,deenergized Radiation Monitor Caused Control Ctr HVAC to Shift to Recirculation Mode.Caused by Improper Review of Sys Functions Prior to Performing Work. Personnel Involved Counseled on Event
type: Subject
label: 05000341/LER-1988-007, :on 880214,deenergized Radiation Monitor Caused Control Ctr HVAC to Shift to Recirculation Mode.Caused by Improper Review of Sys Functions Prior to Performing Work. Personnel Involved Counseled on Event
page: https://kanterella.com/05000341/LER-2D1988-2D007-2C_-3Aon_880214-2Cdeenergized_Radiation_Monitor_Caused_Control_Ctr_HVAC_to_Shift_to_Recirculation_Mode.Caused_by_Improper_Review_of_Sys_Functions_Prior…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000341/LER-1988-007, :on 880214,deenergized Radiation Monitor Caused Control Ctr HVAC to Shift to Recirculation Mode.Caused by Improper Review of Sys Functions Prior to Performing Work. Personnel Involved Counseled on Event

LER-1988-022, :on 880607,0226 & 0530,Tech Specs Violated When Operation Change Completed Prior to Meeting All Applicable Tech Specs Surveillance Requirements.Caused by Personnel Error.Licensed Operators Will Be Trained in Event
type: Subject
label: 05000440/LER-1988-022, :on 880607,0226 & 0530,Tech Specs Violated When Operation Change Completed Prior to Meeting All Applicable Tech Specs Surveillance Requirements.Caused by Personnel Error.Licensed Operators Will Be Trained in Event
page: https://kanterella.com/05000440/LER-2D1988-2D022-2C_-3Aon_880607-2C0226_-26_0530-2CTech_Specs_Violated_When_Operation_Change_Completed_Prior_to_Meeting_All_Applicable_Tech_Specs_Surveillance_Requireme…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000440/LER-1988-022, :on 880607,0226 & 0530,Tech Specs Violated When Operation Change Completed Prior to Meeting All Applicable Tech Specs Surveillance Requirements.Caused by Personnel Error.Licensed Operators Will Be Trained in Event

LER-1997-005, :on 970529,reactor Coolant Sys Leak Occurred. Caused by Failed Compression Fitting.Conducted Review of Compression Fitting Maint Performed on High Pressure Systems & Completed Insps of Compression Fittings
type: Subject
label: 05000317/LER-1997-005, :on 970529,reactor Coolant Sys Leak Occurred. Caused by Failed Compression Fitting.Conducted Review of Compression Fitting Maint Performed on High Pressure Systems & Completed Insps of Compression Fittings
page: https://kanterella.com/05000317/LER-2D1997-2D005-2C_-3Aon_970529-2Creactor_Coolant_Sys_Leak_Occurred._Caused_by_Failed_Compression_Fitting.Conducted_Review_of_Compression_Fitting_Maint_Performed_on_Hi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000317/LER-1997-005, :on 970529,reactor Coolant Sys Leak Occurred. Caused by Failed Compression Fitting.Conducted Review of Compression Fitting Maint Performed on High Pressure Systems & Completed Insps of Compression Fittings

05000366/LER-1988-002, :on 880219,surveillance Requirements of Tech Specs Not Met.Caused by Personnel Error.Special Purpose Procedures Developed & Surveillances Performed or Scheduled
type: Subject
page: https://kanterella.com/05000366/LER-2D1988-2D002-2C_-3Aon_880219-2Csurveillance_Requirements_of_Tech_Specs_Not_Met.Caused_by_Personnel_Error.Special_Purpose_Procedures_Developed_-26_Surveillances_Perf…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000366/LER-1988-002, :on 880219,surveillance Requirements of Tech Specs Not Met.Caused by Personnel Error.Special Purpose Procedures Developed & Surveillances Performed or Scheduled

05000366/LER-1987-016-02, :on 871231,surveillance Not Performed within Time Limit.Caused by Personnel Error.Surveillance Performed, Verified & Schedule Modified.Personnel Counseled. W/88018 Ltr
type: Subject
page: https://kanterella.com/05000366/LER-2D1987-2D016-2D02-2C_-3Aon_871231-2Csurveillance_Not_Performed_within_Time_Limit.Caused_by_Personnel_Error.Surveillance_Performed-2C_Verified_-26_Schedule_Modified.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000366/LER-1987-016-02, :on 871231,surveillance Not Performed within Time Limit.Caused by Personnel Error.Surveillance Performed, Verified & Schedule Modified.Personnel Counseled. W/88018 Ltr

LER-1986-003-02, :on 860208,discovered That Effluent Grab Sample from Chemical Treatment Pond 3 Missed.Caused by Personnel Oversight & Misentry Into Log Book.Personnel Counseled. Procedures Will Be Clarified
type: Subject
label: 05000269/LER-1986-003-02, :on 860208,discovered That Effluent Grab Sample from Chemical Treatment Pond 3 Missed.Caused by Personnel Oversight & Misentry Into Log Book.Personnel Counseled. Procedures Will Be Clarified
page: https://kanterella.com/05000269/LER-2D1986-2D003-2D02-2C_-3Aon_860208-2Cdiscovered_That_Effluent_Grab_Sample_from_Chemical_Treatment_Pond_3_Missed.Caused_by_Personnel_Oversight_-26_Misentry_Into_Log_B…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000269/LER-1986-003-02, :on 860208,discovered That Effluent Grab Sample from Chemical Treatment Pond 3 Missed.Caused by Personnel Oversight & Misentry Into Log Book.Personnel Counseled. Procedures Will Be Clarified

05000341/LER-1986-006, :on 860321,Div II Emergency Equipment Cooling Water & Emergency Equipment Svc Water Sys Automatically Started.Caused by Uncleared Undervoltage Signal on 4,160-volt Emergency Bus
type: Subject
page: https://kanterella.com/05000341/LER-2D1986-2D006-2C_-3Aon_860321-2CDiv_II_Emergency_Equipment_Cooling_Water_-26_Emergency_Equipment_Svc_Water_Sys_Automatically_Started.Caused_by_Uncleared_Undervoltage…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000341/LER-1986-006, :on 860321,Div II Emergency Equipment Cooling Water & Emergency Equipment Svc Water Sys Automatically Started.Caused by Uncleared Undervoltage Signal on 4,160-volt Emergency Bus

Actuators Qualified Per NUREG-0588
type: Subject
label: 05000333/LER-1986-007, :on 860323,Limitorque Valve Actuator Torque & Limit Switch Insulation Discovered Unqualified.Basis for Qualification Not Established in Applicable Rept.Actuators Replaced W/Actuators Qualified Per NUREG-0588
page: https://kanterella.com/05000333/LER-2D1986-2D007-2C_-3Aon_860323-2CLimitorque_Valve_Actuator_Torque_-26_Limit_Switch_Insulation_Discovered_Unqualified.Basis_for_Qualification_Not_Established_in_Applic…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000333/LER-1986-007, :on 860323,Limitorque Valve Actuator Torque & Limit Switch Insulation Discovered Unqualified.Basis for Qualification Not Established in Applicable Rept.Actuators Replaced W/Actuators Qualified Per NUREG-0588

LER-1985-012-01, :on 851130,after Trip,Source Range Nuclear Instrumentation Channel 31 Failed to Reenergize When Reactor Neutron Flux Dropped Below Permissive Setpoint.Caused by Loose Wire Connection.Connection Repaired
type: Subject
label: 05000286/LER-1985-012-01, :on 851130,after Trip,Source Range Nuclear Instrumentation Channel 31 Failed to Reenergize When Reactor Neutron Flux Dropped Below Permissive Setpoint.Caused by Loose Wire Connection.Connection Repaired
page: https://kanterella.com/05000286/LER-2D1985-2D012-2D01-2C_-3Aon_851130-2Cafter_Trip-2CSource_Range_Nuclear_Instrumentation_Channel_31_Failed_to_Reenergize_When_Reactor_Neutron_Flux_Dropped_Below_Permis…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000286/LER-1985-012-01, :on 851130,after Trip,Source Range Nuclear Instrumentation Channel 31 Failed to Reenergize When Reactor Neutron Flux Dropped Below Permissive Setpoint.Caused by Loose Wire Connection.Connection Repaired

LER-1985-001-01, :on 851209,during Cold Shutdown,Small Perforation Discovered in Fuel Oil Header Pressure Return Line Tubing of Emergency Diesel Generator A.Caused by Cyclic Vibration & Chafing Against Skid Frame
type: Subject
label: 05000423/LER-1985-001-01, :on 851209,during Cold Shutdown,Small Perforation Discovered in Fuel Oil Header Pressure Return Line Tubing of Emergency Diesel Generator A.Caused by Cyclic Vibration & Chafing Against Skid Frame
page: https://kanterella.com/05000423/LER-2D1985-2D001-2D01-2C_-3Aon_851209-2Cduring_Cold_Shutdown-2CSmall_Perforation_Discovered_in_Fuel_Oil_Header_Pressure_Return_Line_Tubing_of_Emergency_Diesel_Generator…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000423/LER-1985-001-01, :on 851209,during Cold Shutdown,Small Perforation Discovered in Fuel Oil Header Pressure Return Line Tubing of Emergency Diesel Generator A.Caused by Cyclic Vibration & Chafing Against Skid Frame

LER-1985-093, :on 851218,improper Valve Lineup on Radiation Monitor RU-141 Discovered.Caused by Radiation Protection Technician Error & Missing O-ring from Sample Holder Which Prevented Low Flow Alarm.Procedures Revised
type: Subject
label: 05000528/LER-1985-093, :on 851218,improper Valve Lineup on Radiation Monitor RU-141 Discovered.Caused by Radiation Protection Technician Error & Missing O-ring from Sample Holder Which Prevented Low Flow Alarm.Procedures Revised
page: https://kanterella.com/05000528/LER-2D1985-2D093-2C_-3Aon_851218-2Cimproper_Valve_Lineup_on_Radiation_Monitor_RU-2D141_Discovered.Caused_by_Radiation_Protection_Technician_Error_-26_Missing_O-2Dring_f…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000528/LER-1985-093, :on 851218,improper Valve Lineup on Radiation Monitor RU-141 Discovered.Caused by Radiation Protection Technician Error & Missing O-ring from Sample Holder Which Prevented Low Flow Alarm.Procedures Revised

LER-1985-027, :on 851121,loss of Normal Power Occurred While Trip Testing Breakers.Caused When Technician Used Incorrect Tripping Sequence,Causing Main Transformer to Divorce from Grid.Gas Turbine Failed to Respond
type: Subject
label: 05000245/LER-1985-027, :on 851121,loss of Normal Power Occurred While Trip Testing Breakers.Caused When Technician Used Incorrect Tripping Sequence,Causing Main Transformer to Divorce from Grid.Gas Turbine Failed to Respond
page: https://kanterella.com/05000245/LER-2D1985-2D027-2C_-3Aon_851121-2Closs_of_Normal_Power_Occurred_While_Trip_Testing_Breakers.Caused_When_Technician_Used_Incorrect_Tripping_Sequence-2CCausing_Main_Tran…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000245/LER-1985-027, :on 851121,loss of Normal Power Occurred While Trip Testing Breakers.Caused When Technician Used Incorrect Tripping Sequence,Causing Main Transformer to Divorce from Grid.Gas Turbine Failed to Respond

LER-1984-017, :on 841004,degradation of 15-conductor Interconnection Cable Discovered.Caused by Aging.Insp for Similar Problems in Other Equipment Concluded Problem Isolated Incident.Degraded Equipment Replaced
type: Subject
label: 05000213/LER-1984-017, :on 841004,degradation of 15-conductor Interconnection Cable Discovered.Caused by Aging.Insp for Similar Problems in Other Equipment Concluded Problem Isolated Incident.Degraded Equipment Replaced
page: https://kanterella.com/05000213/LER-2D1984-2D017-2C_-3Aon_841004-2Cdegradation_of_15-2Dconductor_Interconnection_Cable_Discovered.Caused_by_Aging.Insp_for_Similar_Problems_in_Other_Equipment_Concluded…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000213/LER-1984-017, :on 841004,degradation of 15-conductor Interconnection Cable Discovered.Caused by Aging.Insp for Similar Problems in Other Equipment Concluded Problem Isolated Incident.Degraded Equipment Replaced

Inoperable Fire Detection Equipment & Fire Barriers Not Performed within Specified Time Limit.Caused by Personnel Error & Mgt Deficiency
type: Subject
label: 05000413/LER-1985-064, :on 851107,required Fire Watches for Two Fire Zones W/Inoperable Fire Detection Equipment & Fire Barriers Not Performed within Specified Time Limit.Caused by Personnel Error & Mgt Deficiency
page: https://kanterella.com/05000413/LER-2D1985-2D064-2C_-3Aon_851107-2Crequired_Fire_Watches_for_Two_Fire_Zones_W/Inoperable_Fire_Detection_Equipment_-26_Fire_Barriers_Not_Performed_within_Specified_Time_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000413/LER-1985-064, :on 851107,required Fire Watches for Two Fire Zones W/Inoperable Fire Detection Equipment & Fire Barriers Not Performed within Specified Time Limit.Caused by Personnel Error & Mgt Deficiency

LER-1985-062, :on 851104-05,continuous Fire Watch Not Conducted on Diesel Generator 1B While Low Pressure Cardox Fire Protection Sys Disabled.Caused by Miscommunication Between Security & Maint Personnel
type: Subject
label: 05000413/LER-1985-062, :on 851104-05,continuous Fire Watch Not Conducted on Diesel Generator 1B While Low Pressure Cardox Fire Protection Sys Disabled.Caused by Miscommunication Between Security & Maint Personnel
page: https://kanterella.com/05000413/LER-2D1985-2D062-2C_-3Aon_851104-2D05-2Ccontinuous_Fire_Watch_Not_Conducted_on_Diesel_Generator_1B_While_Low_Pressure_Cardox_Fire_Protection_Sys_Disabled.Caused_by_Misc…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000413/LER-1985-062, :on 851104-05,continuous Fire Watch Not Conducted on Diesel Generator 1B While Low Pressure Cardox Fire Protection Sys Disabled.Caused by Miscommunication Between Security & Maint Personnel

LER-1997-003-02, :on 970328,excessive Leakage Identified on Secondary Bypass Valves Was Caused by Undersized Valve Operators & Inappropriate Valve & Operator Orientation. Re-routed Piping Containing Valves
type: Subject
label: 05000366/LER-1997-003-02, :on 970328,excessive Leakage Identified on Secondary Bypass Valves Was Caused by Undersized Valve Operators & Inappropriate Valve & Operator Orientation. Re-routed Piping Containing Valves
page: https://kanterella.com/05000366/LER-2D1997-2D003-2D02-2C_-3Aon_970328-2Cexcessive_Leakage_Identified_on_Secondary_Bypass_Valves_Was_Caused_by_Undersized_Valve_Operators_-26_Inappropriate_Valve_-26_Ope…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000366/LER-1997-003-02, :on 970328,excessive Leakage Identified on Secondary Bypass Valves Was Caused by Undersized Valve Operators & Inappropriate Valve & Operator Orientation. Re-routed Piping Containing Valves

LER-1986-001-03, :on 860131,reactor Tripped from 100- Power. Caused by Procedural Deficiency Resulting in Failure to Block Breaker Failure Initiate Relay to Power Circuit Breaker During Carrier Test.Contacts Replaced
type: Subject
label: 05000270/LER-1986-001-03, :on 860131,reactor Tripped from 100% Power. Caused by Procedural Deficiency Resulting in Failure to Block Breaker Failure Initiate Relay to Power Circuit Breaker During Carrier Test.Contacts Replaced
page: https://kanterella.com/05000270/LER-2D1986-2D001-2D03-2C_-3Aon_860131-2Creactor_Tripped_from_100-_Power._Caused_by_Procedural_Deficiency_Resulting_in_Failure_to_Block_Breaker_Failure_Initiate_Relay_to…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000270/LER-1986-001-03, :on 860131,reactor Tripped from 100% Power. Caused by Procedural Deficiency Resulting in Failure to Block Breaker Failure Initiate Relay to Power Circuit Breaker During Carrier Test.Contacts Replaced

LER-1985-040-03, :on 851021,during Review of Mar 1978 SER Re Plant Fire Protection Program,Discrepancies Concerning Mods Described in SER Discovered.Caused by Inadequate Documentation of Commitments in SER
type: Subject
label: 05000237/LER-1985-040-03, :on 851021,during Review of Mar 1978 SER Re Plant Fire Protection Program,Discrepancies Concerning Mods Described in SER Discovered.Caused by Inadequate Documentation of Commitments in SER
page: https://kanterella.com/05000237/LER-2D1985-2D040-2D03-2C_-3Aon_851021-2Cduring_Review_of_Mar_1978_SER_Re_Plant_Fire_Protection_Program-2CDiscrepancies_Concerning_Mods_Described_in_SER_Discovered.Cause…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000237/LER-1985-040-03, :on 851021,during Review of Mar 1978 SER Re Plant Fire Protection Program,Discrepancies Concerning Mods Described in SER Discovered.Caused by Inadequate Documentation of Commitments in SER

LER-1985-016-01, :on 851126 & 1201,automatic Reactor Trips Occurred During 50- Load Rejection Startup Testing.Caused by Steam Dump Control Sys & Feedwater Control Sys Settings Inadequately Adjusted,Respectively
type: Subject
label: 05000323/LER-1985-016-01, :on 851126 & 1201,automatic Reactor Trips Occurred During 50% Load Rejection Startup Testing.Caused by Steam Dump Control Sys & Feedwater Control Sys Settings Inadequately Adjusted,Respectively
page: https://kanterella.com/05000323/LER-2D1985-2D016-2D01-2C_-3Aon_851126_-26_1201-2Cautomatic_Reactor_Trips_Occurred_During_50-_Load_Rejection_Startup_Testing.Caused_by_Steam_Dump_Control_Sys_-26_Feedwat…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000323/LER-1985-016-01, :on 851126 & 1201,automatic Reactor Trips Occurred During 50% Load Rejection Startup Testing.Caused by Steam Dump Control Sys & Feedwater Control Sys Settings Inadequately Adjusted,Respectively

05000461/LER-1997-004, :on 970204,failed to Properly Implement TS SR 3.6.5.3.3 Due to Inadequate Procedure.Revised Surveillance Procedure to Verify Valves Closed
type: Subject
page: https://kanterella.com/05000461/LER-2D1997-2D004-2C_-3Aon_970204-2Cfailed_to_Properly_Implement_TS_SR_3.6.5.3.3_Due_to_Inadequate_Procedure.Revised_Surveillance_Procedure_to_Verify_Valves_Closed
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000461/LER-1997-004, :on 970204,failed to Properly Implement TS SR 3.6.5.3.3 Due to Inadequate Procedure.Revised Surveillance Procedure to Verify Valves Closed

LER-1996-014, :on 961106,incorrect Circuit Breaker Setting Resulted in Inoperable Edg.Caused by Failure to Incorporate Design Info Into Appropriate Plant Single Line Electrical Drawing.Temporary Plant Mod Will Be Installed
type: Subject
label: 05000321/LER-1996-014, :on 961106,incorrect Circuit Breaker Setting Resulted in Inoperable Edg.Caused by Failure to Incorporate Design Info Into Appropriate Plant Single Line Electrical Drawing.Temporary Plant Mod Will Be Installed
page: https://kanterella.com/05000321/LER-2D1996-2D014-2C_-3Aon_961106-2Cincorrect_Circuit_Breaker_Setting_Resulted_in_Inoperable_Edg.Caused_by_Failure_to_Incorporate_Design_Info_Into_Appropriate_Plant_Sing…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000321/LER-1996-014, :on 961106,incorrect Circuit Breaker Setting Resulted in Inoperable Edg.Caused by Failure to Incorporate Design Info Into Appropriate Plant Single Line Electrical Drawing.Temporary Plant Mod Will Be Installed

LER-1996-006, :on 961008,Kaowool Fire Barrier Sys on Six Unit 1 Raceways Did Not Comply with Program Requirements. Caused by Personnel Error.Hourly Fire Watches Established & Will Remain Until Sys in Compliance
type: Subject
label: 05000348/LER-1996-006, :on 961008,Kaowool Fire Barrier Sys on Six Unit 1 Raceways Did Not Comply with Program Requirements. Caused by Personnel Error.Hourly Fire Watches Established & Will Remain Until Sys in Compliance
page: https://kanterella.com/05000348/LER-2D1996-2D006-2C_-3Aon_961008-2CKaowool_Fire_Barrier_Sys_on_Six_Unit_1_Raceways_Did_Not_Comply_with_Program_Requirements._Caused_by_Personnel_Error.Hourly_Fire_Watch…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000348/LER-1996-006, :on 961008,Kaowool Fire Barrier Sys on Six Unit 1 Raceways Did Not Comply with Program Requirements. Caused by Personnel Error.Hourly Fire Watches Established & Will Remain Until Sys in Compliance

LER-1985-029, :on 850423,determined That End Stringer Clearance in Vital Instrumentation & Control Power Sys Exceeded Limits.Caused by Incorrect Mfg Installation Drawings.Styrofoam Spacers Installed
type: Subject
label: 05000413/LER-1985-029, :on 850423,determined That End Stringer Clearance in Vital Instrumentation & Control Power Sys Exceeded Limits.Caused by Incorrect Mfg Installation Drawings.Styrofoam Spacers Installed
page: https://kanterella.com/05000413/LER-2D1985-2D029-2C_-3Aon_850423-2Cdetermined_That_End_Stringer_Clearance_in_Vital_Instrumentation_-26_Control_Power_Sys_Exceeded_Limits.Caused_by_Incorrect_Mfg_Install…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000413/LER-1985-029, :on 850423,determined That End Stringer Clearance in Vital Instrumentation & Control Power Sys Exceeded Limits.Caused by Incorrect Mfg Installation Drawings.Styrofoam Spacers Installed

LER-1985-023-01, :on 850613,partial Containment Isolation Occurred When Temporary Jumper Slipped Off Relay Neutral During Replacement of Defective Relay.Dislodged Jumper Reconnected & Isolation Reset
type: Subject
label: 05000259/LER-1985-023-01, :on 850613,partial Containment Isolation Occurred When Temporary Jumper Slipped Off Relay Neutral During Replacement of Defective Relay.Dislodged Jumper Reconnected & Isolation Reset
page: https://kanterella.com/05000259/LER-2D1985-2D023-2D01-2C_-3Aon_850613-2Cpartial_Containment_Isolation_Occurred_When_Temporary_Jumper_Slipped_Off_Relay_Neutral_During_Replacement_of_Defective_Relay.Dis…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000259/LER-1985-023-01, :on 850613,partial Containment Isolation Occurred When Temporary Jumper Slipped Off Relay Neutral During Replacement of Defective Relay.Dislodged Jumper Reconnected & Isolation Reset

LER-1985-010-02, :on 850502,vent Line Sight Glass Cracked & Valve Diaphragm Ruptured Due to Opening of Mislabeled Valve While Venting Upper Head Injection Piping.Caused by Administrative Error.Sight Glass & Valve Fixed
type: Subject
label: 05000370/LER-1985-010-02, :on 850502,vent Line Sight Glass Cracked & Valve Diaphragm Ruptured Due to Opening of Mislabeled Valve While Venting Upper Head Injection Piping.Caused by Administrative Error.Sight Glass & Valve Fixed
page: https://kanterella.com/05000370/LER-2D1985-2D010-2D02-2C_-3Aon_850502-2Cvent_Line_Sight_Glass_Cracked_-26_Valve_Diaphragm_Ruptured_Due_to_Opening_of_Mislabeled_Valve_While_Venting_Upper_Head_Injection…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000370/LER-1985-010-02, :on 850502,vent Line Sight Glass Cracked & Valve Diaphragm Ruptured Due to Opening of Mislabeled Valve While Venting Upper Head Injection Piping.Caused by Administrative Error.Sight Glass & Valve Fixed

LER-1985-011-01, :on 850517,reactor Trip Occurred When off-site Power Lost Due to Multiple Faults on High Voltage Power Sys. Caused by Multiple Intense Brush Fires.Natural Circulation Cooling Established
type: Subject
label: 05000251/LER-1985-011-01, :on 850517,reactor Trip Occurred When off-site Power Lost Due to Multiple Faults on High Voltage Power Sys. Caused by Multiple Intense Brush Fires.Natural Circulation Cooling Established
page: https://kanterella.com/05000251/LER-2D1985-2D011-2D01-2C_-3Aon_850517-2Creactor_Trip_Occurred_When_off-2Dsite_Power_Lost_Due_to_Multiple_Faults_on_High_Voltage_Power_Sys._Caused_by_Multiple_Intense_Br…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000251/LER-1985-011-01, :on 850517,reactor Trip Occurred When off-site Power Lost Due to Multiple Faults on High Voltage Power Sys. Caused by Multiple Intense Brush Fires.Natural Circulation Cooling Established

Personnel
type: Subject
label: 05000370/LER-1985-015-01, :on 850517,upper Head Injection Accumulator Declared Inoperable Due to Missed Boron Concentration Verification.Caused by Personnel Oversight.Verification Performed.Event Will Be Reviewed W/Personnel
page: https://kanterella.com/05000370/LER-2D1985-2D015-2D01-2C_-3Aon_850517-2Cupper_Head_Injection_Accumulator_Declared_Inoperable_Due_to_Missed_Boron_Concentration_Verification.Caused_by_Personnel_Oversigh…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000370/LER-1985-015-01, :on 850517,upper Head Injection Accumulator Declared Inoperable Due to Missed Boron Concentration Verification.Caused by Personnel Oversight.Verification Performed.Event Will Be Reviewed W/Personnel

LER-1985-030, :on 850509,nuclear Svc Water Sys Automatically Aligned to Standby Nuclear Svc Water Pond & All Idle Sys Pumps Started Due to False lo-lo Level Signal in Sys Pumphouse Pit B.Caused by Loss of Voltage
type: Subject
label: 05000413/LER-1985-030, :on 850509,nuclear Svc Water Sys Automatically Aligned to Standby Nuclear Svc Water Pond & All Idle Sys Pumps Started Due to False lo-lo Level Signal in Sys Pumphouse Pit B.Caused by Loss of Voltage
page: https://kanterella.com/05000413/LER-2D1985-2D030-2C_-3Aon_850509-2Cnuclear_Svc_Water_Sys_Automatically_Aligned_to_Standby_Nuclear_Svc_Water_Pond_-26_All_Idle_Sys_Pumps_Started_Due_to_False_lo-2Dlo_Lev…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000413/LER-1985-030, :on 850509,nuclear Svc Water Sys Automatically Aligned to Standby Nuclear Svc Water Pond & All Idle Sys Pumps Started Due to False lo-lo Level Signal in Sys Pumphouse Pit B.Caused by Loss of Voltage

Containment Atmosphere Dilution Subsystem Design Did Not Meet FSAR Re Redundancy of Power Supply for Vaporizer Trains.Caused by Changing Regulatory Commitments.Sys Reviewed
type: Subject
label: 05000325/LER-1990-013, :on 900725,determined That Cad/Containment Atmosphere Dilution Subsystem Design Did Not Meet FSAR Re Redundancy of Power Supply for Vaporizer Trains.Caused by Changing Regulatory Commitments.Sys Reviewed
page: https://kanterella.com/05000325/LER-2D1990-2D013-2C_-3Aon_900725-2Cdetermined_That_Cad/Containment_Atmosphere_Dilution_Subsystem_Design_Did_Not_Meet_FSAR_Re_Redundancy_of_Power_Supply_for_Vaporizer_Tr…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000325/LER-1990-013, :on 900725,determined That Cad/Containment Atmosphere Dilution Subsystem Design Did Not Meet FSAR Re Redundancy of Power Supply for Vaporizer Trains.Caused by Changing Regulatory Commitments.Sys Reviewed

05000328/LER-1985-006-03, :on 850406,air Control Valve for ERCW Valve 2-FCV-67-186 Found in Closed Position.Caused by Improper Back Plate Indications.Back Plates Will Be Modified
type: Subject
page: https://kanterella.com/05000328/LER-2D1985-2D006-2D03-2C_-3Aon_850406-2Cair_Control_Valve_for_ERCW_Valve_2-2DFCV-2D67-2D186_Found_in_Closed_Position.Caused_by_Improper_Back_Plate_Indications.Back_Plat…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000328/LER-1985-006-03, :on 850406,air Control Valve for ERCW Valve 2-FCV-67-186 Found in Closed Position.Caused by Improper Back Plate Indications.Back Plates Will Be Modified

05000336/LER-1996-021-01, :on 960227,snubber Failure in Pressurizer Spray Line Occurred.Caused by Corrosion.Replaced Snubber Serial 12883 W/Identical Model PSA-1 Snubber
type: Subject
page: https://kanterella.com/05000336/LER-2D1996-2D021-2D01-2C_-3Aon_960227-2Csnubber_Failure_in_Pressurizer_Spray_Line_Occurred.Caused_by_Corrosion.Replaced_Snubber_Serial_12883_W/Identical_Model_PSA-2D1_S…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000336/LER-1996-021-01, :on 960227,snubber Failure in Pressurizer Spray Line Occurred.Caused by Corrosion.Replaced Snubber Serial 12883 W/Identical Model PSA-1 Snubber

LER-1985-010, :on 850330,subcooling Margin Monitors Considered Inoperable Per Tech Specs & Plant Shutdown.Caused by Failure of RCS Temp Elements to Meet Environ Acceptance Criteria.Elements Will Be Replaced
type: Subject
label: 05000250/LER-1985-010, :on 850330,subcooling Margin Monitors Considered Inoperable Per Tech Specs & Plant Shutdown.Caused by Failure of RCS Temp Elements to Meet Environ Acceptance Criteria.Elements Will Be Replaced
page: https://kanterella.com/05000250/LER-2D1985-2D010-2C_-3Aon_850330-2Csubcooling_Margin_Monitors_Considered_Inoperable_Per_Tech_Specs_-26_Plant_Shutdown.Caused_by_Failure_of_RCS_Temp_Elements_to_Meet_Env…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000250/LER-1985-010, :on 850330,subcooling Margin Monitors Considered Inoperable Per Tech Specs & Plant Shutdown.Caused by Failure of RCS Temp Elements to Meet Environ Acceptance Criteria.Elements Will Be Replaced

LER-1984-056, :on 841219,RCIC Sys Containment Isolation Valve Closed on High Steam Low Signal.Caused by Spurious High Flow Signal Produced by Pressure Oscillations in Sensing Line. Pressure Equalized in Sensing Lines
type: Subject
label: 05000416/LER-1984-056, :on 841219,RCIC Sys Containment Isolation Valve Closed on High Steam Low Signal.Caused by Spurious High Flow Signal Produced by Pressure Oscillations in Sensing Line. Pressure Equalized in Sensing Lines
page: https://kanterella.com/05000416/LER-2D1984-2D056-2C_-3Aon_841219-2CRCIC_Sys_Containment_Isolation_Valve_Closed_on_High_Steam_Low_Signal.Caused_by_Spurious_High_Flow_Signal_Produced_by_Pressure_Oscilla…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000416/LER-1984-056, :on 841219,RCIC Sys Containment Isolation Valve Closed on High Steam Low Signal.Caused by Spurious High Flow Signal Produced by Pressure Oscillations in Sensing Line. Pressure Equalized in Sensing Lines

05000293/LER-1985-004, :on 850215,reactor Shut Down Due to Small Leak in Socket Weld.Spool Piece & Weld Replaced
type: Subject
page: https://kanterella.com/05000293/LER-2D1985-2D004-2C_-3Aon_850215-2Creactor_Shut_Down_Due_to_Small_Leak_in_Socket_Weld.Spool_Piece_-26_Weld_Replaced
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000293/LER-1985-004, :on 850215,reactor Shut Down Due to Small Leak in Socket Weld.Spool Piece & Weld Replaced

05000413/LER-1984-030-02, :on 841129,containment Penetration Leak Rate Test Performed Improperly.Caused by Penetration Piping Being Completely Drained.Procedures Revised
type: Subject
page: https://kanterella.com/05000413/LER-2D1984-2D030-2D02-2C_-3Aon_841129-2Ccontainment_Penetration_Leak_Rate_Test_Performed_Improperly.Caused_by_Penetration_Piping_Being_Completely_Drained.Procedures_Rev…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000413/LER-1984-030-02, :on 841129,containment Penetration Leak Rate Test Performed Improperly.Caused by Penetration Piping Being Completely Drained.Procedures Revised

05000416/LER-1984-055, :on 841130,discrepancies Identified Between Design & Commitments to Reg Guide 1.63 Involving Overcurrent Protection of Containment Penetrations
type: Subject
page: https://kanterella.com/05000416/LER-2D1984-2D055-2C_-3Aon_841130-2Cdiscrepancies_Identified_Between_Design_-26_Commitments_to_Reg_Guide_1.63_Involving_Overcurrent_Protection_of_Containment_Penetration…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000416/LER-1984-055, :on 841130,discrepancies Identified Between Design & Commitments to Reg Guide 1.63 Involving Overcurrent Protection of Containment Penetrations

Lag Cards Found Not Installed.Caused by Deficient Vendor Drawings & Documents.Adequacy of Current Testing Procedures Checked
type: Subject
label: 05000370/LER-1984-030-01, :on 841126,following 841124 Reactor Trip, Jumpers on Two Lead/Lag Cards Found Not Installed.Caused by Deficient Vendor Drawings & Documents.Adequacy of Current Testing Procedures Checked
page: https://kanterella.com/05000370/LER-2D1984-2D030-2D01-2C_-3Aon_841126-2Cfollowing_841124_Reactor_Trip-2C_Jumpers_on_Two_Lead/Lag_Cards_Found_Not_Installed.Caused_by_Deficient_Vendor_Drawings_-26_Docum…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000370/LER-1984-030-01, :on 841126,following 841124 Reactor Trip, Jumpers on Two Lead/Lag Cards Found Not Installed.Caused by Deficient Vendor Drawings & Documents.Adequacy of Current Testing Procedures Checked

05000269/LER-1984-004-04, :on 841006,RCS Cooldown Rate Exceeded as Temp Decreased 57 F in 1/2 H.Caused by Personnel Error.Personnel Counseled Re Correct Interpretation of Appropriate Tech Spec
type: Subject
page: https://kanterella.com/05000269/LER-2D1984-2D004-2D04-2C_-3Aon_841006-2CRCS_Cooldown_Rate_Exceeded_as_Temp_Decreased_57_F_in_1/2_H.Caused_by_Personnel_Error.Personnel_Counseled_Re_Correct_Interpretati…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000269/LER-1984-004-04, :on 841006,RCS Cooldown Rate Exceeded as Temp Decreased 57 F in 1/2 H.Caused by Personnel Error.Personnel Counseled Re Correct Interpretation of Appropriate Tech Spec

LER-1985-012, :on 850117,Tech Spec Surveillance for Steam Generator Blowdown Containment Isolation Valves Found Past Critical Date Re Valve 1SD005C.Caused by Testing of Improper Valve on 850108.Surveillance Program Modified
type: Subject
label: 05000454/LER-1985-012, :on 850117,Tech Spec Surveillance for Steam Generator Blowdown Containment Isolation Valves Found Past Critical Date Re Valve 1SD005C.Caused by Testing of Improper Valve on 850108.Surveillance Program Modified
page: https://kanterella.com/05000454/LER-2D1985-2D012-2C_-3Aon_850117-2CTech_Spec_Surveillance_for_Steam_Generator_Blowdown_Containment_Isolation_Valves_Found_Past_Critical_Date_Re_Valve_1SD005C.Caused_by_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000454/LER-1985-012, :on 850117,Tech Spec Surveillance for Steam Generator Blowdown Containment Isolation Valves Found Past Critical Date Re Valve 1SD005C.Caused by Testing of Improper Valve on 850108.Surveillance Program Modified

05000327/LER-1984-061, :on 840927,RCS Pressurizer Relief Tank Pressure Indicators Had Wrong Pressure Range.Cause Not Stated.Instrument Ranges Will Be Reviewed to Ensure Agreement W/Tech Specs
type: Subject
page: https://kanterella.com/05000327/LER-2D1984-2D061-2C_-3Aon_840927-2CRCS_Pressurizer_Relief_Tank_Pressure_Indicators_Had_Wrong_Pressure_Range.Cause_Not_Stated.Instrument_Ranges_Will_Be_Reviewed_to_Ensur…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000327/LER-1984-061, :on 840927,RCS Pressurizer Relief Tank Pressure Indicators Had Wrong Pressure Range.Cause Not Stated.Instrument Ranges Will Be Reviewed to Ensure Agreement W/Tech Specs

05000388/LER-1985-001, :on 850112,HPCI Turbine Failed to Trip During Hot Functional Test HF-252-011.Caused by Broken Stop Valve Actuator Shaft.Actuator Shaft Replaced
type: Subject
page: https://kanterella.com/05000388/LER-2D1985-2D001-2C_-3Aon_850112-2CHPCI_Turbine_Failed_to_Trip_During_Hot_Functional_Test_HF-2D252-2D011.Caused_by_Broken_Stop_Valve_Actuator_Shaft.Actuator_Shaft_Repla…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000388/LER-1985-001, :on 850112,HPCI Turbine Failed to Trip During Hot Functional Test HF-252-011.Caused by Broken Stop Valve Actuator Shaft.Actuator Shaft Replaced

Ice Condenser Lower Inlet Doors Blocked Closed.Incident Discovered on 850109.Caused by Personnel Error.Blocking Devices Removed & Training Sessions Held
type: Subject
label: 05000413/LER-1985-002, :on 841231,unit Entered Hot Shutdown W/Ice Condenser Lower Inlet Doors Blocked Closed.Incident Discovered on 850109.Caused by Personnel Error.Blocking Devices Removed & Training Sessions Held
page: https://kanterella.com/05000413/LER-2D1985-2D002-2C_-3Aon_841231-2Cunit_Entered_Hot_Shutdown_W/Ice_Condenser_Lower_Inlet_Doors_Blocked_Closed.Incident_Discovered_on_850109.Caused_by_Personnel_Error.Bl…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000413/LER-1985-002, :on 841231,unit Entered Hot Shutdown W/Ice Condenser Lower Inlet Doors Blocked Closed.Incident Discovered on 850109.Caused by Personnel Error.Blocking Devices Removed & Training Sessions Held

05000334/LER-1984-011, :on 841012,eight Main Steam Safety Valve Lift Settings Found Outside Tech Spec Limits.Caused by Setpoint Drift.Valves Adjusted & Tested
type: Subject
page: https://kanterella.com/05000334/LER-2D1984-2D011-2C_-3Aon_841012-2Ceight_Main_Steam_Safety_Valve_Lift_Settings_Found_Outside_Tech_Spec_Limits.Caused_by_Setpoint_Drift.Valves_Adjusted_-26_Tested
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000334/LER-1984-011, :on 841012,eight Main Steam Safety Valve Lift Settings Found Outside Tech Spec Limits.Caused by Setpoint Drift.Valves Adjusted & Tested

05000260/LER-1984-008-04, :on 841129,IGSCC Indications Found in Recirculation Piping Reactor Water Cleanup Piping & Jet Pump Instrument Nozzles.Affected Welds Will Be Repaired Before Startup
type: Subject
page: https://kanterella.com/05000260/LER-2D1984-2D008-2D04-2C_-3Aon_841129-2CIGSCC_Indications_Found_in_Recirculation_Piping_Reactor_Water_Cleanup_Piping_-26_Jet_Pump_Instrument_Nozzles.Affected_Welds_Will…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000260/LER-1984-008-04, :on 841129,IGSCC Indications Found in Recirculation Piping Reactor Water Cleanup Piping & Jet Pump Instrument Nozzles.Affected Welds Will Be Repaired Before Startup

LER-1985-006-02, :on 850304,during Performance of HPCI Sys Motor Operated Valve Operability Surveillance Instruction 4.5.E.1.c,HPCI Inverter Fuse Cleared.Caused by Blown Inverter Fuse.Fuse Replaced
type: Subject
label: 05000259/LER-1985-006-02, :on 850304,during Performance of HPCI Sys Motor Operated Valve Operability Surveillance Instruction 4.5.E.1.c,HPCI Inverter Fuse Cleared.Caused by Blown Inverter Fuse.Fuse Replaced
page: https://kanterella.com/05000259/LER-2D1985-2D006-2D02-2C_-3Aon_850304-2Cduring_Performance_of_HPCI_Sys_Motor_Operated_Valve_Operability_Surveillance_Instruction_4.5.E.1.c-2CHPCI_Inverter_Fuse_Cleared.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000259/LER-1985-006-02, :on 850304,during Performance of HPCI Sys Motor Operated Valve Operability Surveillance Instruction 4.5.E.1.c,HPCI Inverter Fuse Cleared.Caused by Blown Inverter Fuse.Fuse Replaced

05000316/LER-1985-004-01, :on 850125,RCS Loop 2 Cold Leg Temp Found Not Environmentally Qualified.On 850126,unit Trip Occurred. Caused by Unrelated Component Failure.Loop Replaced W/Qualified Spare
type: Subject
page: https://kanterella.com/05000316/LER-2D1985-2D004-2D01-2C_-3Aon_850125-2CRCS_Loop_2_Cold_Leg_Temp_Found_Not_Environmentally_Qualified.On_850126-2Cunit_Trip_Occurred._Caused_by_Unrelated_Component_Failu…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000316/LER-1985-004-01, :on 850125,RCS Loop 2 Cold Leg Temp Found Not Environmentally Qualified.On 850126,unit Trip Occurred. Caused by Unrelated Component Failure.Loop Replaced W/Qualified Spare

LER-1984-018, :on 840823,operator Discovered Air Hose Blocking Open Fire Door Between Equipment Space 1 & Cable Spreading Room.Caused by Misinterpretation of End of Walkdown Procedures.Hose Removed
type: Subject
label: 05000280/LER-1984-018, :on 840823,operator Discovered Air Hose Blocking Open Fire Door Between Equipment Space 1 & Cable Spreading Room.Caused by Misinterpretation of End of Walkdown Procedures.Hose Removed
page: https://kanterella.com/05000280/LER-2D1984-2D018-2C_-3Aon_840823-2Coperator_Discovered_Air_Hose_Blocking_Open_Fire_Door_Between_Equipment_Space_1_-26_Cable_Spreading_Room.Caused_by_Misinterpretation_o…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000280/LER-1984-018, :on 840823,operator Discovered Air Hose Blocking Open Fire Door Between Equipment Space 1 & Cable Spreading Room.Caused by Misinterpretation of End of Walkdown Procedures.Hose Removed

05000414/LER-1995-006-02, :on 951215,missed TS Surveillance for Ac Offsite Power Sources.Caused by Personnel Error.Discussed Mgt Expectations for Attention to Detail W/Operator at Controls
type: Subject
page: https://kanterella.com/05000414/LER-2D1995-2D006-2D02-2C_-3Aon_951215-2Cmissed_TS_Surveillance_for_Ac_Offsite_Power_Sources.Caused_by_Personnel_Error.Discussed_Mgt_Expectations_for_Attention_to_Detail…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000414/LER-1995-006-02, :on 951215,missed TS Surveillance for Ac Offsite Power Sources.Caused by Personnel Error.Discussed Mgt Expectations for Attention to Detail W/Operator at Controls

LER-1995-006, :on 950824,improper Start of Number 1 DG Caused Rt.Caused by Inadequate Administrative Controls on Critical Parameter.Provided Addl Administrative Controls to Ensure That Governor Was Operated Correctly
type: Subject
label: 05000285/LER-1995-006, :on 950824,improper Start of Number 1 DG Caused Rt.Caused by Inadequate Administrative Controls on Critical Parameter.Provided Addl Administrative Controls to Ensure That Governor Was Operated Correctly
page: https://kanterella.com/05000285/LER-2D1995-2D006-2C_-3Aon_950824-2Cimproper_Start_of_Number_1_DG_Caused_Rt.Caused_by_Inadequate_Administrative_Controls_on_Critical_Parameter.Provided_Addl_Administrati…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000285/LER-1995-006, :on 950824,improper Start of Number 1 DG Caused Rt.Caused by Inadequate Administrative Controls on Critical Parameter.Provided Addl Administrative Controls to Ensure That Governor Was Operated Correctly

LER-1995-015, :on 951101,ESF Actuation Occurred Due to Misinterpretation of Procedural Note of Determining Differential Proessure Across MSIV Prior to Opening Valve. Counseled Involved Personnel
type: Subject
label: 05000327/LER-1995-015, :on 951101,ESF Actuation Occurred Due to Misinterpretation of Procedural Note of Determining Differential Proessure Across MSIV Prior to Opening Valve. Counseled Involved Personnel
page: https://kanterella.com/05000327/LER-2D1995-2D015-2C_-3Aon_951101-2CESF_Actuation_Occurred_Due_to_Misinterpretation_of_Procedural_Note_of_Determining_Differential_Proessure_Across_MSIV_Prior_to_Opening…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000327/LER-1995-015, :on 951101,ESF Actuation Occurred Due to Misinterpretation of Procedural Note of Determining Differential Proessure Across MSIV Prior to Opening Valve. Counseled Involved Personnel

05000315/LER-1984-007-01, :on 840522,detector Code Programming Error Discovered in Calculational Logic While Modifying Code. Procedure Change Made to Require Independent Line by Line Review of Coding
type: Subject
page: https://kanterella.com/05000315/LER-2D1984-2D007-2D01-2C_-3Aon_840522-2Cdetector_Code_Programming_Error_Discovered_in_Calculational_Logic_While_Modifying_Code._Procedure_Change_Made_to_Require_Indepen…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000315/LER-1984-007-01, :on 840522,detector Code Programming Error Discovered in Calculational Logic While Modifying Code. Procedure Change Made to Require Independent Line by Line Review of Coding

LER-1984-006-03, :on 840501,performance of Maint on Turbine Isolation Valves & MSIVs Resulted in Communication Via Main Steam Piping Between Reactor Bldg & Turbine Bldg.Caused by Procedural Inadequacy
type: Subject
label: 05000254/LER-1984-006-03, :on 840501,performance of Maint on Turbine Isolation Valves & MSIVs Resulted in Communication Via Main Steam Piping Between Reactor Bldg & Turbine Bldg.Caused by Procedural Inadequacy
page: https://kanterella.com/05000254/LER-2D1984-2D006-2D03-2C_-3Aon_840501-2Cperformance_of_Maint_on_Turbine_Isolation_Valves_-26_MSIVs_Resulted_in_Communication_Via_Main_Steam_Piping_Between_Reactor_Bldg_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000254/LER-1984-006-03, :on 840501,performance of Maint on Turbine Isolation Valves & MSIVs Resulted in Communication Via Main Steam Piping Between Reactor Bldg & Turbine Bldg.Caused by Procedural Inadequacy

LER-1984-010-01, :on 840423,during Startup Operations,Turbine Trip & Reactor Trip Occurred.Caused by high-high Level in Steam Generator 23.Feedwater Flow Nozzle Replaced & All Sys Performed as Designed
type: Subject
label: 05000311/LER-1984-010-01, :on 840423,during Startup Operations,Turbine Trip & Reactor Trip Occurred.Caused by high-high Level in Steam Generator 23.Feedwater Flow Nozzle Replaced & All Sys Performed as Designed
page: https://kanterella.com/05000311/LER-2D1984-2D010-2D01-2C_-3Aon_840423-2Cduring_Startup_Operations-2CTurbine_Trip_-26_Reactor_Trip_Occurred.Caused_by_high-2Dhigh_Level_in_Steam_Generator_23.Feedwater_F…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000311/LER-1984-010-01, :on 840423,during Startup Operations,Turbine Trip & Reactor Trip Occurred.Caused by high-high Level in Steam Generator 23.Feedwater Flow Nozzle Replaced & All Sys Performed as Designed

LER-1984-006, :on 840413,during Refueling Outage,Ak Breaker Feeding Power Tripped Open Due to Dirty Contacts,Causing Loss of Power to Powerboard & Other Sys.Full Scram Signal Resulted.Breaker Contacts Cleaned
type: Subject
label: 05000220/LER-1984-006, :on 840413,during Refueling Outage,Ak Breaker Feeding Power Tripped Open Due to Dirty Contacts,Causing Loss of Power to Powerboard & Other Sys.Full Scram Signal Resulted.Breaker Contacts Cleaned
page: https://kanterella.com/05000220/LER-2D1984-2D006-2C_-3Aon_840413-2Cduring_Refueling_Outage-2CAk_Breaker_Feeding_Power_Tripped_Open_Due_to_Dirty_Contacts-2CCausing_Loss_of_Power_to_Powerboard_-26_Other…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000220/LER-1984-006, :on 840413,during Refueling Outage,Ak Breaker Feeding Power Tripped Open Due to Dirty Contacts,Causing Loss of Power to Powerboard & Other Sys.Full Scram Signal Resulted.Breaker Contacts Cleaned

05000220/LER-1984-010, :on 840608,reactor Protection Sys Channel 4 Power Supply Bus Experienced Momentary Power Loss Causing Condenser vacuum-MSIV Closure Scram Bypass Relays to Deenergize
type: Subject
page: https://kanterella.com/05000220/LER-2D1984-2D010-2C_-3Aon_840608-2Creactor_Protection_Sys_Channel_4_Power_Supply_Bus_Experienced_Momentary_Power_Loss_Causing_Condenser_vacuum-2DMSIV_Closure_Scram_Bypa…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000220/LER-1984-010, :on 840608,reactor Protection Sys Channel 4 Power Supply Bus Experienced Momentary Power Loss Causing Condenser vacuum-MSIV Closure Scram Bypass Relays to Deenergize

LER-1984-020, :on 840606,reactor Tripped When Spurious Undervoltage Relay Actuation Deenergized One Reactor Coolant Pump.Caused by Component Malfunction.Further Testing Will Be Conducted to Determine Failure Mechanism
type: Subject
label: 05000369/LER-1984-020, :on 840606,reactor Tripped When Spurious Undervoltage Relay Actuation Deenergized One Reactor Coolant Pump.Caused by Component Malfunction.Further Testing Will Be Conducted to Determine Failure Mechanism
page: https://kanterella.com/05000369/LER-2D1984-2D020-2C_-3Aon_840606-2Creactor_Tripped_When_Spurious_Undervoltage_Relay_Actuation_Deenergized_One_Reactor_Coolant_Pump.Caused_by_Component_Malfunction.Furth…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000369/LER-1984-020, :on 840606,reactor Tripped When Spurious Undervoltage Relay Actuation Deenergized One Reactor Coolant Pump.Caused by Component Malfunction.Further Testing Will Be Conducted to Determine Failure Mechanism

O Full Containment Isolation.Caused by Staff Error & Procedural Inadequacy.All Licensed Operators to Receive Addl Training & Procedures Revised
type: Subject
label: 05000289/LER-1991-004, :on 911008,irradiated Fuel to Test Hoist Interlocks W/O Full Containment Isolation.Caused by Staff Error & Procedural Inadequacy.All Licensed Operators to Receive Addl Training & Procedures Revised
page: https://kanterella.com/05000289/LER-2D1991-2D004-2C_-3Aon_911008-2Cirradiated_Fuel_to_Test_Hoist_Interlocks_W/O_Full_Containment_Isolation.Caused_by_Staff_Error_-26_Procedural_Inadequacy.All_Licensed_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000289/LER-1991-004, :on 911008,irradiated Fuel to Test Hoist Interlocks W/O Full Containment Isolation.Caused by Staff Error & Procedural Inadequacy.All Licensed Operators to Receive Addl Training & Procedures Revised

LER-1984-006, :on 840213,reactor Water Indicating Switch Found Out of Tech Spec Limits.Caused by Excessive Internal Mechanical Friction.Surveillance of Equipment Will Be Performed & Manufacturer Contacted
type: Subject
label: 05000333/LER-1984-006, :on 840213,reactor Water Indicating Switch Found Out of Tech Spec Limits.Caused by Excessive Internal Mechanical Friction.Surveillance of Equipment Will Be Performed & Manufacturer Contacted
page: https://kanterella.com/05000333/LER-2D1984-2D006-2C_-3Aon_840213-2Creactor_Water_Indicating_Switch_Found_Out_of_Tech_Spec_Limits.Caused_by_Excessive_Internal_Mechanical_Friction.Surveillance_of_Equipm…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000333/LER-1984-006, :on 840213,reactor Water Indicating Switch Found Out of Tech Spec Limits.Caused by Excessive Internal Mechanical Friction.Surveillance of Equipment Will Be Performed & Manufacturer Contacted

LER-1984-001-01, :on 831005,1220 & 840203,ECCS Pump Room Ventilation Sys Exhaust Fan Discharge Damper 21 Would Not Open.Caused by Air Supply to Exhaust Fan Discharge Damper Isolated.Air Restored & Sys Returned to Svc
type: Subject
label: 05000318/LER-1984-001-01, :on 831005,1220 & 840203,ECCS Pump Room Ventilation Sys Exhaust Fan Discharge Damper 21 Would Not Open.Caused by Air Supply to Exhaust Fan Discharge Damper Isolated.Air Restored & Sys Returned to Svc
page: https://kanterella.com/05000318/LER-2D1984-2D001-2D01-2C_-3Aon_831005-2C1220_-26_840203-2CECCS_Pump_Room_Ventilation_Sys_Exhaust_Fan_Discharge_Damper_21_Would_Not_Open.Caused_by_Air_Supply_to_Exhaust_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000318/LER-1984-001-01, :on 831005,1220 & 840203,ECCS Pump Room Ventilation Sys Exhaust Fan Discharge Damper 21 Would Not Open.Caused by Air Supply to Exhaust Fan Discharge Damper Isolated.Air Restored & Sys Returned to Svc

05000364/LER-1995-005, :on 950601,loss of electro-hydraulic Fluid Resulted in Manual Rts.Repaired & Selected Welds on Eh Sys of 2A & 2B SGFP
type: Subject
page: https://kanterella.com/05000364/LER-2D1995-2D005-2C_-3Aon_950601-2Closs_of_electro-2Dhydraulic_Fluid_Resulted_in_Manual_Rts.Repaired_-26_Selected_Welds_on_Eh_Sys_of_2A_-26_2B_SGFP
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000364/LER-1995-005, :on 950601,loss of electro-hydraulic Fluid Resulted in Manual Rts.Repaired & Selected Welds on Eh Sys of 2A & 2B SGFP

Zero Output.Caused by Defective Ramp Generator & Signal Converter Box.Generator Replaced.Sys Tested Satisfactorily
type: Subject
label: 05000298/LER-1984-004, :on 840405,operator Observed Increase in Turbine Speed & Pump Discharge Pressure W/Zero Output.Caused by Defective Ramp Generator & Signal Converter Box.Generator Replaced.Sys Tested Satisfactorily
page: https://kanterella.com/05000298/LER-2D1984-2D004-2C_-3Aon_840405-2Coperator_Observed_Increase_in_Turbine_Speed_-26_Pump_Discharge_Pressure_W/Zero_Output.Caused_by_Defective_Ramp_Generator_-26_Signal_C…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000298/LER-1984-004, :on 840405,operator Observed Increase in Turbine Speed & Pump Discharge Pressure W/Zero Output.Caused by Defective Ramp Generator & Signal Converter Box.Generator Replaced.Sys Tested Satisfactorily

LER-1984-004, :on 840315,67 of 267 Snubbers Failed to Meet Acceptance Criteria Stipulated in Snubber Administrative Procedures.Snubber Program Being Revised to Provide Better Controls on Maint & Tracking of Snubbers
type: Subject
label: 05000281/LER-1984-004, :on 840315,67 of 267 Snubbers Failed to Meet Acceptance Criteria Stipulated in Snubber Administrative Procedures.Snubber Program Being Revised to Provide Better Controls on Maint & Tracking of Snubbers
page: https://kanterella.com/05000281/LER-2D1984-2D004-2C_-3Aon_840315-2C67_of_267_Snubbers_Failed_to_Meet_Acceptance_Criteria_Stipulated_in_Snubber_Administrative_Procedures.Snubber_Program_Being_Revised_t…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000281/LER-1984-004, :on 840315,67 of 267 Snubbers Failed to Meet Acceptance Criteria Stipulated in Snubber Administrative Procedures.Snubber Program Being Revised to Provide Better Controls on Maint & Tracking of Snubbers

LER-1984-008-01, :on 840112,during FSAR Review,Nrc Noted Several Model Changes to Westinghouse Marvel Code Used to Calculate Mass & Energy Release for Main Steam Line Breaks. Cause Not Stated.Analysis Performed
type: Subject
label: 05000369/LER-1984-008-01, :on 840112,during FSAR Review,Nrc Noted Several Model Changes to Westinghouse Marvel Code Used to Calculate Mass & Energy Release for Main Steam Line Breaks. Cause Not Stated.Analysis Performed
page: https://kanterella.com/05000369/LER-2D1984-2D008-2D01-2C_-3Aon_840112-2Cduring_FSAR_Review-2CNrc_Noted_Several_Model_Changes_to_Westinghouse_Marvel_Code_Used_to_Calculate_Mass_-26_Energy_Release_for_M…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000369/LER-1984-008-01, :on 840112,during FSAR Review,Nrc Noted Several Model Changes to Westinghouse Marvel Code Used to Calculate Mass & Energy Release for Main Steam Line Breaks. Cause Not Stated.Analysis Performed

05000458/LER-1995-005-02, :on 950627,HPCS Pump Breaker Tripped During Surveillance Testing.Cause of Failure Not Identified.Breaker Internals,Prop Springs & Closing Latch Spring Inspected.W/
type: Subject
page: https://kanterella.com/05000458/LER-2D1995-2D005-2D02-2C_-3Aon_950627-2CHPCS_Pump_Breaker_Tripped_During_Surveillance_Testing.Cause_of_Failure_Not_Identified.Breaker_Internals-2CProp_Springs_-26_Closi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000458/LER-1995-005-02, :on 950627,HPCS Pump Breaker Tripped During Surveillance Testing.Cause of Failure Not Identified.Breaker Internals,Prop Springs & Closing Latch Spring Inspected.W/

LER-1984-002, :on 840103,HPCI Inboard Steam Supply Isolation Valve Declared Inoperable.Caused by Technician Mistakenly Installing Jumper Across Relay Contact.Jumper Removed Allowing Valve to Open & Return to Svc
type: Subject
label: 05000331/LER-1984-002, :on 840103,HPCI Inboard Steam Supply Isolation Valve Declared Inoperable.Caused by Technician Mistakenly Installing Jumper Across Relay Contact.Jumper Removed Allowing Valve to Open & Return to Svc
page: https://kanterella.com/05000331/LER-2D1984-2D002-2C_-3Aon_840103-2CHPCI_Inboard_Steam_Supply_Isolation_Valve_Declared_Inoperable.Caused_by_Technician_Mistakenly_Installing_Jumper_Across_Relay_Contact.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000331/LER-1984-002, :on 840103,HPCI Inboard Steam Supply Isolation Valve Declared Inoperable.Caused by Technician Mistakenly Installing Jumper Across Relay Contact.Jumper Removed Allowing Valve to Open & Return to Svc

Block Previously Bypassed for Power Operation.Order Issued Suspending Cleaning of Control Boards
type: Subject
label: 05000445/LER-1990-009, :on 900421,reactor Trip Occurred Due to Accidental Bumping of Source Range Reactor Trip Reset/Block Previously Bypassed for Power Operation.Order Issued Suspending Cleaning of Control Boards
page: https://kanterella.com/05000445/LER-2D1990-2D009-2C_-3Aon_900421-2Creactor_Trip_Occurred_Due_to_Accidental_Bumping_of_Source_Range_Reactor_Trip_Reset/Block_Previously_Bypassed_for_Power_Operation.Orde…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000445/LER-1990-009, :on 900421,reactor Trip Occurred Due to Accidental Bumping of Source Range Reactor Trip Reset/Block Previously Bypassed for Power Operation.Order Issued Suspending Cleaning of Control Boards

LER-1994-015, :on 940410,during Surveillance Test,Inadvertent Decrease of RPV Water Level Occurred.Caused by Failure to Recognize Interactions.Corrective Action:Restored RPV Water Level & Isolated Leakage
type: Subject
label: 05000245/LER-1994-015, :on 940410,during Surveillance Test,Inadvertent Decrease of RPV Water Level Occurred.Caused by Failure to Recognize Interactions.Corrective Action:Restored RPV Water Level & Isolated Leakage
page: https://kanterella.com/05000245/LER-2D1994-2D015-2C_-3Aon_940410-2Cduring_Surveillance_Test-2CInadvertent_Decrease_of_RPV_Water_Level_Occurred.Caused_by_Failure_to_Recognize_Interactions.Corrective_Ac…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000245/LER-1994-015, :on 940410,during Surveillance Test,Inadvertent Decrease of RPV Water Level Occurred.Caused by Failure to Recognize Interactions.Corrective Action:Restored RPV Water Level & Isolated Leakage

LER-1991-002, :on 901209,ventilation Isolation Actuation Signal Generated by High Alarm on Process Radiation Monitor RM-062.Caused by Accumulation of Noncondensible Gases in Sample Piping.Valve Packing Leak Repaired
type: Subject
label: 05000285/LER-1991-002, :on 901209,ventilation Isolation Actuation Signal Generated by High Alarm on Process Radiation Monitor RM-062.Caused by Accumulation of Noncondensible Gases in Sample Piping.Valve Packing Leak Repaired
page: https://kanterella.com/05000285/LER-2D1991-2D002-2C_-3Aon_901209-2Cventilation_Isolation_Actuation_Signal_Generated_by_High_Alarm_on_Process_Radiation_Monitor_RM-2D062.Caused_by_Accumulation_of_Noncon…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000285/LER-1991-002, :on 901209,ventilation Isolation Actuation Signal Generated by High Alarm on Process Radiation Monitor RM-062.Caused by Accumulation of Noncondensible Gases in Sample Piping.Valve Packing Leak Repaired

LER-1989-014-03, :on 891110 & 11,containment Ventilation Isolations Occurred.Caused by Personnel Error.Procedure to Be Issued for Use While Venting Sys Known or Suspected to Contain Radioactive Noble Gases
type: Subject
label: 05000328/LER-1989-014-03, :on 891110 & 11,containment Ventilation Isolations Occurred.Caused by Personnel Error.Procedure to Be Issued for Use While Venting Sys Known or Suspected to Contain Radioactive Noble Gases
page: https://kanterella.com/05000328/LER-2D1989-2D014-2D03-2C_-3Aon_891110_-26_11-2Ccontainment_Ventilation_Isolations_Occurred.Caused_by_Personnel_Error.Procedure_to_Be_Issued_for_Use_While_Venting_Sys_Kn…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000328/LER-1989-014-03, :on 891110 & 11,containment Ventilation Isolations Occurred.Caused by Personnel Error.Procedure to Be Issued for Use While Venting Sys Known or Suspected to Contain Radioactive Noble Gases

LER-1988-002-01, :on 880119,vent Stack wide-range Gas Monitor RM 1WV-3547-1 Declared Inoperable Under Tech Spec 3.3.3.11, Due to Missed Maint Surveillance Test on 871227.Caused by Procedural Deficiency.Procedure Revised
type: Subject
label: 05000400/LER-1988-002-01, :on 880119,vent Stack wide-range Gas Monitor RM 1WV-3547-1 Declared Inoperable Under Tech Spec 3.3.3.11, Due to Missed Maint Surveillance Test on 871227.Caused by Procedural Deficiency.Procedure Revised
page: https://kanterella.com/05000400/LER-2D1988-2D002-2D01-2C_-3Aon_880119-2Cvent_Stack_wide-2Drange_Gas_Monitor_RM_1WV-2D3547-2D1_Declared_Inoperable_Under_Tech_Spec_3.3.3.11-2C_Due_to_Missed_Maint_Survei…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000400/LER-1988-002-01, :on 880119,vent Stack wide-range Gas Monitor RM 1WV-3547-1 Declared Inoperable Under Tech Spec 3.3.3.11, Due to Missed Maint Surveillance Test on 871227.Caused by Procedural Deficiency.Procedure Revised

LER-1987-052, :on 870831,mechanic & Health Physics Technician Exiting Containment Through Personnel Access Hatch When One of Door o-ring Seals Fell Out of Groove.Caused by Personnel Error.Work Request Issued to Repair Door
type: Subject
label: 05000400/LER-1987-052, :on 870831,mechanic & Health Physics Technician Exiting Containment Through Personnel Access Hatch When One of Door o-ring Seals Fell Out of Groove.Caused by Personnel Error.Work Request Issued to Repair Door
page: https://kanterella.com/05000400/LER-2D1987-2D052-2C_-3Aon_870831-2Cmechanic_-26_Health_Physics_Technician_Exiting_Containment_Through_Personnel_Access_Hatch_When_One_of_Door_o-2Dring_Seals_Fell_Out_of…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000400/LER-1987-052, :on 870831,mechanic & Health Physics Technician Exiting Containment Through Personnel Access Hatch When One of Door o-ring Seals Fell Out of Groove.Caused by Personnel Error.Work Request Issued to Repair Door

LER-1998-004-02, :on 980419,defeat of Turbine Trip Function Led to Improper Mode Entry.Caused by Inadequate Administrative Controls of Work Process.Controls to Prevent Recurrence Are Being Instituted
type: Subject
label: 05000425/LER-1998-004-02, :on 980419,defeat of Turbine Trip Function Led to Improper Mode Entry.Caused by Inadequate Administrative Controls of Work Process.Controls to Prevent Recurrence Are Being Instituted
page: https://kanterella.com/05000425/LER-2D1998-2D004-2D02-2C_-3Aon_980419-2Cdefeat_of_Turbine_Trip_Function_Led_to_Improper_Mode_Entry.Caused_by_Inadequate_Administrative_Controls_of_Work_Process.Controls…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000425/LER-1998-004-02, :on 980419,defeat of Turbine Trip Function Led to Improper Mode Entry.Caused by Inadequate Administrative Controls of Work Process.Controls to Prevent Recurrence Are Being Instituted

LER-1989-003, :on 890307,plant Shutdown Due to Air Leak on Feedwater Regulating Valve (Frv).Caused by Failure to Identify Need to Perform Adequate Preventive Maint on Positioner.Frv Controller Placed in Manual
type: Subject
label: 05000318/LER-1989-003, :on 890307,plant Shutdown Due to Air Leak on Feedwater Regulating Valve (Frv).Caused by Failure to Identify Need to Perform Adequate Preventive Maint on Positioner.Frv Controller Placed in Manual
page: https://kanterella.com/05000318/LER-2D1989-2D003-2C_-3Aon_890307-2Cplant_Shutdown_Due_to_Air_Leak_on_Feedwater_Regulating_Valve_-28Frv-29.Caused_by_Failure_to_Identify_Need_to_Perform_Adequate_Prevent…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000318/LER-1989-003, :on 890307,plant Shutdown Due to Air Leak on Feedwater Regulating Valve (Frv).Caused by Failure to Identify Need to Perform Adequate Preventive Maint on Positioner.Frv Controller Placed in Manual

LER-1987-003-03, :on 870503,analysis of Water Sample from Reactor Vessel Found Ph Outside of Tech Spec (TS) Limits.On 870505,conductivity Increased Beyond TS Limits.Rwcu Demineralizers Placed in Svc
type: Subject
label: 05000260/LER-1987-003-03, :on 870503,analysis of Water Sample from Reactor Vessel Found Ph Outside of Tech Spec (TS) Limits.On 870505,conductivity Increased Beyond TS Limits.Rwcu Demineralizers Placed in Svc
page: https://kanterella.com/05000260/LER-2D1987-2D003-2D03-2C_-3Aon_870503-2Canalysis_of_Water_Sample_from_Reactor_Vessel_Found_Ph_Outside_of_Tech_Spec_-28TS-29_Limits.On_870505-2Cconductivity_Increased_Be…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000260/LER-1987-003-03, :on 870503,analysis of Water Sample from Reactor Vessel Found Ph Outside of Tech Spec (TS) Limits.On 870505,conductivity Increased Beyond TS Limits.Rwcu Demineralizers Placed in Svc

LER-1986-006, :on 860416,discovered Specific Gravities of Battery Cells on 3 of 4 Dc Busses Below Min.Caused by Failure to Correct Specific Gravities to Full Electrolyte Level.Administrative Procedure Revised
type: Subject
label: 05000339/LER-1986-006, :on 860416,discovered Specific Gravities of Battery Cells on 3 of 4 Dc Busses Below Min.Caused by Failure to Correct Specific Gravities to Full Electrolyte Level.Administrative Procedure Revised
page: https://kanterella.com/05000339/LER-2D1986-2D006-2C_-3Aon_860416-2Cdiscovered_Specific_Gravities_of_Battery_Cells_on_3_of_4_Dc_Busses_Below_Min.Caused_by_Failure_to_Correct_Specific_Gravities_to_Full_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000339/LER-1986-006, :on 860416,discovered Specific Gravities of Battery Cells on 3 of 4 Dc Busses Below Min.Caused by Failure to Correct Specific Gravities to Full Electrolyte Level.Administrative Procedure Revised

LER-1986-037, :on 861212,min Redundancy Requirements Not Met When Power Range Neutron Flux Detector N-41 Taken Out of Svc.Caused by Failure to Place Overpower Reactor Trip Signal in Tripped Condition.Procedure Revised
type: Subject
label: 05000250/LER-1986-037, :on 861212,min Redundancy Requirements Not Met When Power Range Neutron Flux Detector N-41 Taken Out of Svc.Caused by Failure to Place Overpower Reactor Trip Signal in Tripped Condition.Procedure Revised
page: https://kanterella.com/05000250/LER-2D1986-2D037-2C_-3Aon_861212-2Cmin_Redundancy_Requirements_Not_Met_When_Power_Range_Neutron_Flux_Detector_N-2D41_Taken_Out_of_Svc.Caused_by_Failure_to_Place_Overpow…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000250/LER-1986-037, :on 861212,min Redundancy Requirements Not Met When Power Range Neutron Flux Detector N-41 Taken Out of Svc.Caused by Failure to Place Overpower Reactor Trip Signal in Tripped Condition.Procedure Revised

LER-1986-004, :on 860228,reversing Starters Improperly Arranged in Motor Control Ctr & Fault in Control Transformer Could Result in Loss of Ctr.Design Change Implemented & Problem Will Be Resolved During Outage
type: Subject
label: 05000315/LER-1986-004, :on 860228,reversing Starters Improperly Arranged in Motor Control Ctr & Fault in Control Transformer Could Result in Loss of Ctr.Design Change Implemented & Problem Will Be Resolved During Outage
page: https://kanterella.com/05000315/LER-2D1986-2D004-2C_-3Aon_860228-2Creversing_Starters_Improperly_Arranged_in_Motor_Control_Ctr_-26_Fault_in_Control_Transformer_Could_Result_in_Loss_of_Ctr.Design_Chang…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000315/LER-1986-004, :on 860228,reversing Starters Improperly Arranged in Motor Control Ctr & Fault in Control Transformer Could Result in Loss of Ctr.Design Change Implemented & Problem Will Be Resolved During Outage

05000237/LER-1986-018-04, :on 860713,reactor Coolant Sample Not Taken During Reactor Startup.Caused by Miscommunication within Radiation Chemistry Dept.Event Discussed W/Involved Personnel
type: Subject
page: https://kanterella.com/05000237/LER-2D1986-2D018-2D04-2C_-3Aon_860713-2Creactor_Coolant_Sample_Not_Taken_During_Reactor_Startup.Caused_by_Miscommunication_within_Radiation_Chemistry_Dept.Event_Discuss…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000237/LER-1986-018-04, :on 860713,reactor Coolant Sample Not Taken During Reactor Startup.Caused by Miscommunication within Radiation Chemistry Dept.Event Discussed W/Involved Personnel

Last Design Document.Work Completed as Described in Design Document
type: Subject
label: 05000423/LER-1988-013, :on 880328,incomplete Installation to Circuits in Hydrogen Recombiner Sys Determined.Caused by Circuits Not Being Installed in Accordance W/Last Design Document.Work Completed as Described in Design Document
page: https://kanterella.com/05000423/LER-2D1988-2D013-2C_-3Aon_880328-2Cincomplete_Installation_to_Circuits_in_Hydrogen_Recombiner_Sys_Determined.Caused_by_Circuits_Not_Being_Installed_in_Accordance_W/Last…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000423/LER-1988-013, :on 880328,incomplete Installation to Circuits in Hydrogen Recombiner Sys Determined.Caused by Circuits Not Being Installed in Accordance W/Last Design Document.Work Completed as Described in Design Document

LER-1986-007, :on 860213,HPCI Steam Supply Outboard Isolation Valve 2E41-F002 Isolated Due to Unplanned Isolation Signal from Differential Pressure Transmitter.Caused by Defective Procedure.New Procedure Written
type: Subject
label: 05000366/LER-1986-007, :on 860213,HPCI Steam Supply Outboard Isolation Valve 2E41-F002 Isolated Due to Unplanned Isolation Signal from Differential Pressure Transmitter.Caused by Defective Procedure.New Procedure Written
page: https://kanterella.com/05000366/LER-2D1986-2D007-2C_-3Aon_860213-2CHPCI_Steam_Supply_Outboard_Isolation_Valve_2E41-2DF002_Isolated_Due_to_Unplanned_Isolation_Signal_from_Differential_Pressure_Transmit…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000366/LER-1986-007, :on 860213,HPCI Steam Supply Outboard Isolation Valve 2E41-F002 Isolated Due to Unplanned Isolation Signal from Differential Pressure Transmitter.Caused by Defective Procedure.New Procedure Written

LER-1985-007, :on 850122,diesel Generators 1A & 1B Started on Blackout Signal.During Troubleshooting on Circuit Breaker 1B,Zone B Lockout Initiated,Causing Trip of 6,900-volt Switchgear.Caused by Design Deficiency
type: Subject
label: 05000413/LER-1985-007, :on 850122,diesel Generators 1A & 1B Started on Blackout Signal.During Troubleshooting on Circuit Breaker 1B,Zone B Lockout Initiated,Causing Trip of 6,900-volt Switchgear.Caused by Design Deficiency
page: https://kanterella.com/05000413/LER-2D1985-2D007-2C_-3Aon_850122-2Cdiesel_Generators_1A_-26_1B_Started_on_Blackout_Signal.During_Troubleshooting_on_Circuit_Breaker_1B-2CZone_B_Lockout_Initiated-2CCaus…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000413/LER-1985-007, :on 850122,diesel Generators 1A & 1B Started on Blackout Signal.During Troubleshooting on Circuit Breaker 1B,Zone B Lockout Initiated,Causing Trip of 6,900-volt Switchgear.Caused by Design Deficiency

05000364/LER-1990-005-01, :on 901216,total of 574 Tubes Previously in Svc Found to Be Defective Which Requires Insp Results to Be Classified as Category C-3
type: Subject
page: https://kanterella.com/05000364/LER-2D1990-2D005-2D01-2C_-3Aon_901216-2Ctotal_of_574_Tubes_Previously_in_Svc_Found_to_Be_Defective_Which_Requires_Insp_Results_to_Be_Classified_as_Category_C-2D3
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000364/LER-1990-005-01, :on 901216,total of 574 Tubes Previously in Svc Found to Be Defective Which Requires Insp Results to Be Classified as Category C-3

LER-1987-011-01, :on 870730,inadvertent Safety Injection Occurred Due to Low Steam Line Pressure.Caused by Personnel Error.Test Engineer Reassigned & Incident Will Be Reviewed at Safety Meetings
type: Subject
label: 05000412/LER-1987-011-01, :on 870730,inadvertent Safety Injection Occurred Due to Low Steam Line Pressure.Caused by Personnel Error.Test Engineer Reassigned & Incident Will Be Reviewed at Safety Meetings
page: https://kanterella.com/05000412/LER-2D1987-2D011-2D01-2C_-3Aon_870730-2Cinadvertent_Safety_Injection_Occurred_Due_to_Low_Steam_Line_Pressure.Caused_by_Personnel_Error.Test_Engineer_Reassigned_-26_Inci…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 304A
wiki page sort key: 05000412/LER-1987-011-01, :on 870730,inadvertent Safety Injection Occurred Due to Low Steam Line Pressure.Caused by Personnel Error.Test Engineer Reassigned & Incident Will Be Reviewed at Safety Meetings

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