NRC Form 3MA
type: Ontology
creation date: 2025-12-16T07:16:17-05:00
imports: http://semantic-mediawiki.org/swivt/1.0

NRC Form 3MA
type: Subject
page: https://kanterella.com/NRC_Form_3MA
wiki namespace: 0
wiki page content language: en
wiki page sort key: NRC Form 3MA

LER-1989-021-02, :on 890918,identified Possibility for Single Relay Failure Leaving Control Room HVAC Train in Normal Mode When Emergency Mode Would Be Desired.Switchover Circuitry Not Designed to Meet Single Failure Criteria
type: Subject
label: 05000255/LER-1989-021-02, :on 890918,identified Possibility for Single Relay Failure Leaving Control Room HVAC Train in Normal Mode When Emergency Mode Would Be Desired.Switchover Circuitry Not Designed to Meet Single Failure Criteria
page: https://kanterella.com/05000255/LER-2D1989-2D021-2D02-2C_-3Aon_890918-2Cidentified_Possibility_for_Single_Relay_Failure_Leaving_Control_Room_HVAC_Train_in_Normal_Mode_When_Emergency_Mode_Would_Be_Desi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000255/LER-1989-021-02, :on 890918,identified Possibility for Single Relay Failure Leaving Control Room HVAC Train in Normal Mode When Emergency Mode Would Be Desired.Switchover Circuitry Not Designed to Meet Single Failure Criteria

LER-1989-006, :on 890323 & 0516,concern Re Potential Complete Loss of Component Cooling Water (CCW) Following High Energy Line Break (HELB) Noted.Caused by CCW Sys Design Inadequacy. HELB Evaluation of CCW Sys to Be Performed
type: Subject
label: 05000255/LER-1989-006, :on 890323 & 0516,concern Re Potential Complete Loss of Component Cooling Water (CCW) Following High Energy Line Break (HELB) Noted.Caused by CCW Sys Design Inadequacy. HELB Evaluation of CCW Sys to Be Performed
page: https://kanterella.com/05000255/LER-2D1989-2D006-2C_-3Aon_890323_-26_0516-2Cconcern_Re_Potential_Complete_Loss_of_Component_Cooling_Water_-28CCW-29_Following_High_Energy_Line_Break_-28HELB-29_Noted.Ca…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000255/LER-1989-006, :on 890323 & 0516,concern Re Potential Complete Loss of Component Cooling Water (CCW) Following High Energy Line Break (HELB) Noted.Caused by CCW Sys Design Inadequacy. HELB Evaluation of CCW Sys to Be Performed

LER-1987-019-02, :on 870621,diesel Generator 1-1 & 1-2 Inadvertently Actuated While Personnel Attempted to Latch Turbine Generator.Caused by Failure of Autostop Oil Pressure Switch.Sop 8 Revised to Instruct Operations
type: Subject
label: 05000255/LER-1987-019-02, :on 870621,diesel Generator 1-1 & 1-2 Inadvertently Actuated While Personnel Attempted to Latch Turbine Generator.Caused by Failure of Autostop Oil Pressure Switch.Sop 8 Revised to Instruct Operations
page: https://kanterella.com/05000255/LER-2D1987-2D019-2D02-2C_-3Aon_870621-2Cdiesel_Generator_1-2D1_-26_1-2D2_Inadvertently_Actuated_While_Personnel_Attempted_to_Latch_Turbine_Generator.Caused_by_Failure_o…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000255/LER-1987-019-02, :on 870621,diesel Generator 1-1 & 1-2 Inadvertently Actuated While Personnel Attempted to Latch Turbine Generator.Caused by Failure of Autostop Oil Pressure Switch.Sop 8 Revised to Instruct Operations

ML20137L786
type: Subject
page: https://kanterella.com/ML20137L786
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: ML20137L786

ML20147H258
type: Subject
page: https://kanterella.com/ML20147H258
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: ML20147H258

ML20129G558
type: Subject
page: https://kanterella.com/ML20129G558
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: ML20129G558

ML20203G365
type: Subject
page: https://kanterella.com/ML20203G365
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: ML20203G365

NL-08-1906, LER 08-S01-00, for Edwin I. Hatch, Failure to Report Arrest Results in Inappropriate Access to Protected and Vital Areas
type: Subject
page: https://kanterella.com/NL-2D08-2D1906-2C_LER_08-2DS01-2D00-2C_for_Edwin_I._Hatch-2C_Failure_to_Report_Arrest_Results_in_Inappropriate_Access_to_Protected_and_Vital_Areas
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: NL-08-1906, LER 08-S01-00, for Edwin I. Hatch, Failure to Report Arrest Results in Inappropriate Access to Protected and Vital Areas

ML20138Q549
type: Subject
page: https://kanterella.com/ML20138Q549
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: ML20138Q549

LER-1989-019-01, :on 890830,discovered That Five Doors Requiring Monthly Functional Tests,Per Tech Specs,Not Included on Surveillance Test.Caused by Deficiency in Methodology & Refs Used During Surveillance
type: Subject
label: 05000277/LER-1989-019-01, :on 890830,discovered That Five Doors Requiring Monthly Functional Tests,Per Tech Specs,Not Included on Surveillance Test.Caused by Deficiency in Methodology & Refs Used During Surveillance
page: https://kanterella.com/05000277/LER-2D1989-2D019-2D01-2C_-3Aon_890830-2Cdiscovered_That_Five_Doors_Requiring_Monthly_Functional_Tests-2CPer_Tech_Specs-2CNot_Included_on_Surveillance_Test.Caused_by_Def…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000277/LER-1989-019-01, :on 890830,discovered That Five Doors Requiring Monthly Functional Tests,Per Tech Specs,Not Included on Surveillance Test.Caused by Deficiency in Methodology & Refs Used During Surveillance

LER-1989-006, :on 890224,isolation of RCIC & on 890302, Isolation of HPCI Occurred.Caused by Problems in Electrical Path from Thermocouples Monitoring Area Temp.Retermination of Broken Thermocouple Wire Before Break
type: Subject
label: 05000331/LER-1989-006, :on 890224,isolation of RCIC & on 890302, Isolation of HPCI Occurred.Caused by Problems in Electrical Path from Thermocouples Monitoring Area Temp.Retermination of Broken Thermocouple Wire Before Break
page: https://kanterella.com/05000331/LER-2D1989-2D006-2C_-3Aon_890224-2Cisolation_of_RCIC_-26_on_890302-2C_Isolation_of_HPCI_Occurred.Caused_by_Problems_in_Electrical_Path_from_Thermocouples_Monitoring_Are…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000331/LER-1989-006, :on 890224,isolation of RCIC & on 890302, Isolation of HPCI Occurred.Caused by Problems in Electrical Path from Thermocouples Monitoring Area Temp.Retermination of Broken Thermocouple Wire Before Break

05000334/LER-1998-018, :on 980409,inadequate Beaver Valley Power Station Procedures to Ensure Compliance W/Tech Specs Were Noted.Caused by Inadequate Training of Procedure Writers.Revised Procedures
type: Subject
page: https://kanterella.com/05000334/LER-2D1998-2D018-2C_-3Aon_980409-2Cinadequate_Beaver_Valley_Power_Station_Procedures_to_Ensure_Compliance_W/Tech_Specs_Were_Noted.Caused_by_Inadequate_Training_of_Proce…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000334/LER-1998-018, :on 980409,inadequate Beaver Valley Power Station Procedures to Ensure Compliance W/Tech Specs Were Noted.Caused by Inadequate Training of Procedure Writers.Revised Procedures

LER-1998-005-01, :on 980725,initiated Plant Cooldown Due to RCS Pressure Boundary Leakage.Caused by Crack in Inconel Alloy 600-type Weld Filler Matl of Nozzle.Leaking Penetration Was Repaired from Outside of Pressurizer
type: Subject
label: 05000318/LER-1998-005-01, :on 980725,initiated Plant Cooldown Due to RCS Pressure Boundary Leakage.Caused by Crack in Inconel Alloy 600-type Weld Filler Matl of Nozzle.Leaking Penetration Was Repaired from Outside of Pressurizer
page: https://kanterella.com/05000318/LER-2D1998-2D005-2D01-2C_-3Aon_980725-2Cinitiated_Plant_Cooldown_Due_to_RCS_Pressure_Boundary_Leakage.Caused_by_Crack_in_Inconel_Alloy_600-2Dtype_Weld_Filler_Matl_of_No…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000318/LER-1998-005-01, :on 980725,initiated Plant Cooldown Due to RCS Pressure Boundary Leakage.Caused by Crack in Inconel Alloy 600-type Weld Filler Matl of Nozzle.Leaking Penetration Was Repaired from Outside of Pressurizer

Design Basis Re Sf Storage Racks Was Noted.Caused by Deterioration as Result of Improper Matl Selection.Controlled SFP Boron Concentration & Silica Concentration
type: Subject
label: 05000454/LER-1996-014, :on 960903,failure to Comply W/Design Basis Re Sf Storage Racks Was Noted.Caused by Deterioration as Result of Improper Matl Selection.Controlled SFP Boron Concentration & Silica Concentration
page: https://kanterella.com/05000454/LER-2D1996-2D014-2C_-3Aon_960903-2Cfailure_to_Comply_W/Design_Basis_Re_Sf_Storage_Racks_Was_Noted.Caused_by_Deterioration_as_Result_of_Improper_Matl_Selection.Controlle…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000454/LER-1996-014, :on 960903,failure to Comply W/Design Basis Re Sf Storage Racks Was Noted.Caused by Deterioration as Result of Improper Matl Selection.Controlled SFP Boron Concentration & Silica Concentration

Ts.Caused by Inadequate Evaluation of Adequacy of Test Methodology. Procedure Changes Will Be Implemented
type: Subject
label: 05000336/LER-1998-015-01, :on 980504,channel Functional Testing of Digital Radiation Monitors Did Not Comply W/Ts.Caused by Inadequate Evaluation of Adequacy of Test Methodology. Procedure Changes Will Be Implemented
page: https://kanterella.com/05000336/LER-2D1998-2D015-2D01-2C_-3Aon_980504-2Cchannel_Functional_Testing_of_Digital_Radiation_Monitors_Did_Not_Comply_W/Ts.Caused_by_Inadequate_Evaluation_of_Adequacy_of_Test…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000336/LER-1998-015-01, :on 980504,channel Functional Testing of Digital Radiation Monitors Did Not Comply W/Ts.Caused by Inadequate Evaluation of Adequacy of Test Methodology. Procedure Changes Will Be Implemented

05000374/LER-1999-002-06, :on 990821,automatic Scram Occurred Due to Failure of Reactor Water Level Control.Caused by Inadequate Maint on 2A Tdrep Servo Valve 2FW163AA.Repaired Servo Valve
type: Subject
page: https://kanterella.com/05000374/LER-2D1999-2D002-2D06-2C_-3Aon_990821-2Cautomatic_Scram_Occurred_Due_to_Failure_of_Reactor_Water_Level_Control.Caused_by_Inadequate_Maint_on_2A_Tdrep_Servo_Valve_2FW163…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000374/LER-1999-002-06, :on 990821,automatic Scram Occurred Due to Failure of Reactor Water Level Control.Caused by Inadequate Maint on 2A Tdrep Servo Valve 2FW163AA.Repaired Servo Valve

LER-1997-001, :on 970408,inconsistencies Between Once Through SG Tube Destructive Examination Were Noted.Caused by Morphology Differences Between Flaws Used to Develop Sizing Technique.Discretion Was Verbally Approved
type: Subject
label: 05000313/LER-1997-001, :on 970408,inconsistencies Between Once Through SG Tube Destructive Examination Were Noted.Caused by Morphology Differences Between Flaws Used to Develop Sizing Technique.Discretion Was Verbally Approved
page: https://kanterella.com/05000313/LER-2D1997-2D001-2C_-3Aon_970408-2Cinconsistencies_Between_Once_Through_SG_Tube_Destructive_Examination_Were_Noted.Caused_by_Morphology_Differences_Between_Flaws_Used_t…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000313/LER-1997-001, :on 970408,inconsistencies Between Once Through SG Tube Destructive Examination Were Noted.Caused by Morphology Differences Between Flaws Used to Develop Sizing Technique.Discretion Was Verbally Approved

LER-1997-017, :on 970930,spent Fuel Storage Facility Crane Surveillances Were Not Met.Caused by Inadequate Procedural Guidance.Spent Fuel Bridge Crane Declared Inoperable Until Procedure Revised
type: Subject
label: 05000482/LER-1997-017, :on 970930,spent Fuel Storage Facility Crane Surveillances Were Not Met.Caused by Inadequate Procedural Guidance.Spent Fuel Bridge Crane Declared Inoperable Until Procedure Revised
page: https://kanterella.com/05000482/LER-2D1997-2D017-2C_-3Aon_970930-2Cspent_Fuel_Storage_Facility_Crane_Surveillances_Were_Not_Met.Caused_by_Inadequate_Procedural_Guidance.Spent_Fuel_Bridge_Crane_Declare…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000482/LER-1997-017, :on 970930,spent Fuel Storage Facility Crane Surveillances Were Not Met.Caused by Inadequate Procedural Guidance.Spent Fuel Bridge Crane Declared Inoperable Until Procedure Revised

LER-1985-019-01, :on 850524,inadequate Seismic Piping Supports Discovered.Caused by Personnel Errors.Drawing Discrepancies Re Both Pipes Corrected & Sk Series of Prints Superseded by 47W Series of Prints
type: Subject
label: 05000327/LER-1985-019-01, :on 850524,inadequate Seismic Piping Supports Discovered.Caused by Personnel Errors.Drawing Discrepancies Re Both Pipes Corrected & Sk Series of Prints Superseded by 47W Series of Prints
page: https://kanterella.com/05000327/LER-2D1985-2D019-2D01-2C_-3Aon_850524-2Cinadequate_Seismic_Piping_Supports_Discovered.Caused_by_Personnel_Errors.Drawing_Discrepancies_Re_Both_Pipes_Corrected_-26_Sk_Se…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000327/LER-1985-019-01, :on 850524,inadequate Seismic Piping Supports Discovered.Caused by Personnel Errors.Drawing Discrepancies Re Both Pipes Corrected & Sk Series of Prints Superseded by 47W Series of Prints

LER-1998-016, :on 981028,single DG Start,Occurred.Caused by Loss of One Source of Offsite Power.Generator Relay Surveillance Revised to Eliminate Possibility of Inadvertent Procedural Breaker Trips.With
type: Subject
label: 05000219/LER-1998-016, :on 981028,single DG Start,Occurred.Caused by Loss of One Source of Offsite Power.Generator Relay Surveillance Revised to Eliminate Possibility of Inadvertent Procedural Breaker Trips.With
page: https://kanterella.com/05000219/LER-2D1998-2D016-2C_-3Aon_981028-2Csingle_DG_Start-2COccurred.Caused_by_Loss_of_One_Source_of_Offsite_Power.Generator_Relay_Surveillance_Revised_to_Eliminate_Possibilit…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000219/LER-1998-016, :on 981028,single DG Start,Occurred.Caused by Loss of One Source of Offsite Power.Generator Relay Surveillance Revised to Eliminate Possibility of Inadvertent Procedural Breaker Trips.With

LER-1999-004-01, On 990325,drywell Pressure Instrumentation Sensing Line Deficiency,Was Determined.Caused by Incorrect Design & Installation of Instrument Sensing Lines.Associated Sensing Lines Were Purged.With
type: Subject
label: 05000325/LER-1999-004-01, On 990325,drywell Pressure Instrumentation Sensing Line Deficiency,Was Determined.Caused by Incorrect Design & Installation of Instrument Sensing Lines.Associated Sensing Lines Were Purged.With
page: https://kanterella.com/05000325/LER-2D1999-2D004-2D01-2C_On_990325-2Cdrywell_Pressure_Instrumentation_Sensing_Line_Deficiency-2CWas_Determined.Caused_by_Incorrect_Design_-26_Installation_of_Instrument…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000325/LER-1999-004-01, On 990325,drywell Pressure Instrumentation Sensing Line Deficiency,Was Determined.Caused by Incorrect Design & Installation of Instrument Sensing Lines.Associated Sensing Lines Were Purged.With

LER-1999-001-01, :on 990227,failure to Comply with TSs Due to Not Meeting Acceptance Criteria for Source Range Monitor During Surveillance Testing,Was Discovered.Caused by Lack of Attention.Procedure 20ST-2.3 re-performed.With
type: Subject
label: 05000412/LER-1999-001-01, :on 990227,failure to Comply with TSs Due to Not Meeting Acceptance Criteria for Source Range Monitor During Surveillance Testing,Was Discovered.Caused by Lack of Attention.Procedure 20ST-2.3 re-performed.With
page: https://kanterella.com/05000412/LER-2D1999-2D001-2D01-2C_-3Aon_990227-2Cfailure_to_Comply_with_TSs_Due_to_Not_Meeting_Acceptance_Criteria_for_Source_Range_Monitor_During_Surveillance_Testing-2CWas_Dis…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000412/LER-1999-001-01, :on 990227,failure to Comply with TSs Due to Not Meeting Acceptance Criteria for Source Range Monitor During Surveillance Testing,Was Discovered.Caused by Lack of Attention.Procedure 20ST-2.3 re-performed.With

Ts Limit for Dose Equivalent Iodine Creates Potential for Operation Outside Design Basis.Caused by Density Correction.Sgs Replaced
type: Subject
label: 05000456/LER-1997-008-06, :on 971010,determined That Projected SG leak- Rate Combined W/Ts Limit for Dose Equivalent Iodine Creates Potential for Operation Outside Design Basis.Caused by Density Correction.Sgs Replaced
page: https://kanterella.com/05000456/LER-2D1997-2D008-2D06-2C_-3Aon_971010-2Cdetermined_That_Projected_SG_leak-2D_Rate_Combined_W/Ts_Limit_for_Dose_Equivalent_Iodine_Creates_Potential_for_Operation_Outside…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000456/LER-1997-008-06, :on 971010,determined That Projected SG leak- Rate Combined W/Ts Limit for Dose Equivalent Iodine Creates Potential for Operation Outside Design Basis.Caused by Density Correction.Sgs Replaced

LER-1998-022, :on 981002,unplanned Actuation of a EDG Occurred During Surveillance Test of Related Logic Sys Testing.Caused by Util non-licensed I&C Technician Error. Will Review Surveillance Procedures.With
type: Subject
label: 05000293/LER-1998-022, :on 981002,unplanned Actuation of a EDG Occurred During Surveillance Test of Related Logic Sys Testing.Caused by Util non-licensed I&C Technician Error. Will Review Surveillance Procedures.With
page: https://kanterella.com/05000293/LER-2D1998-2D022-2C_-3Aon_981002-2Cunplanned_Actuation_of_a_EDG_Occurred_During_Surveillance_Test_of_Related_Logic_Sys_Testing.Caused_by_Util_non-2Dlicensed_I-26C_Techn…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000293/LER-1998-022, :on 981002,unplanned Actuation of a EDG Occurred During Surveillance Test of Related Logic Sys Testing.Caused by Util non-licensed I&C Technician Error. Will Review Surveillance Procedures.With

LER-1998-005-02, :on 980924,suspended Safeguards During Severe Weather Due to Personnel Safety.Caused by Severe Weather Associated with Effects of Hurricane Georges.Fully Instituted Compensatory Measure.With
type: Subject
label: 05000250/LER-1998-005-02, :on 980924,suspended Safeguards During Severe Weather Due to Personnel Safety.Caused by Severe Weather Associated with Effects of Hurricane Georges.Fully Instituted Compensatory Measure.With
page: https://kanterella.com/05000250/LER-2D1998-2D005-2D02-2C_-3Aon_980924-2Csuspended_Safeguards_During_Severe_Weather_Due_to_Personnel_Safety.Caused_by_Severe_Weather_Associated_with_Effects_of_Hurricane…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000250/LER-1998-005-02, :on 980924,suspended Safeguards During Severe Weather Due to Personnel Safety.Caused by Severe Weather Associated with Effects of Hurricane Georges.Fully Instituted Compensatory Measure.With

LER-1998-015-02, :on 980819,manual Reactor Scram Occurred Following Level Control Transient.Caused by Failure of Control Card Associated with Bailey Rwl Cs.Replaced Failed Card with Refurbished Unit.With
type: Subject
label: 05000373/LER-1998-015-02, :on 980819,manual Reactor Scram Occurred Following Level Control Transient.Caused by Failure of Control Card Associated with Bailey Rwl Cs.Replaced Failed Card with Refurbished Unit.With
page: https://kanterella.com/05000373/LER-2D1998-2D015-2D02-2C_-3Aon_980819-2Cmanual_Reactor_Scram_Occurred_Following_Level_Control_Transient.Caused_by_Failure_of_Control_Card_Associated_with_Bailey_Rwl_Cs.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000373/LER-1998-015-02, :on 980819,manual Reactor Scram Occurred Following Level Control Transient.Caused by Failure of Control Card Associated with Bailey Rwl Cs.Replaced Failed Card with Refurbished Unit.With

LER-1997-004-02, :on 970331,inaccurate List of Primary Containment Isolation Valves Resulted in Missed Surveillance.Caused by Listing of PCIS Valve Position Indications.Performed Missed Surveillance
type: Subject
label: 05000366/LER-1997-004-02, :on 970331,inaccurate List of Primary Containment Isolation Valves Resulted in Missed Surveillance.Caused by Listing of PCIS Valve Position Indications.Performed Missed Surveillance
page: https://kanterella.com/05000366/LER-2D1997-2D004-2D02-2C_-3Aon_970331-2Cinaccurate_List_of_Primary_Containment_Isolation_Valves_Resulted_in_Missed_Surveillance.Caused_by_Listing_of_PCIS_Valve_Position…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000366/LER-1997-004-02, :on 970331,inaccurate List of Primary Containment Isolation Valves Resulted in Missed Surveillance.Caused by Listing of PCIS Valve Position Indications.Performed Missed Surveillance

LER-1985-019, :on 851026,partial Reactor Scram Occurred Due to Momentary Short in CRD Gas Pressure Circuit.Caused by Worn Mechanical Seal Allowing More Seal Water to Flow Through than Normal.Seal Leakage Reduced
type: Subject
label: 05000409/LER-1985-019, :on 851026,partial Reactor Scram Occurred Due to Momentary Short in CRD Gas Pressure Circuit.Caused by Worn Mechanical Seal Allowing More Seal Water to Flow Through than Normal.Seal Leakage Reduced
page: https://kanterella.com/05000409/LER-2D1985-2D019-2C_-3Aon_851026-2Cpartial_Reactor_Scram_Occurred_Due_to_Momentary_Short_in_CRD_Gas_Pressure_Circuit.Caused_by_Worn_Mechanical_Seal_Allowing_More_Seal_W…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000409/LER-1985-019, :on 851026,partial Reactor Scram Occurred Due to Momentary Short in CRD Gas Pressure Circuit.Caused by Worn Mechanical Seal Allowing More Seal Water to Flow Through than Normal.Seal Leakage Reduced

LER-1985-016, :on 850802,determined That Strainers Still Installed in Suction Piping of HPI Pumps Not Considered in Operating Design.Caused by Failure to Remove Strainers Following Const.Strainers Removed
type: Subject
label: 05000346/LER-1985-016, :on 850802,determined That Strainers Still Installed in Suction Piping of HPI Pumps Not Considered in Operating Design.Caused by Failure to Remove Strainers Following Const.Strainers Removed
page: https://kanterella.com/05000346/LER-2D1985-2D016-2C_-3Aon_850802-2Cdetermined_That_Strainers_Still_Installed_in_Suction_Piping_of_HPI_Pumps_Not_Considered_in_Operating_Design.Caused_by_Failure_to_Remo…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000346/LER-1985-016, :on 850802,determined That Strainers Still Installed in Suction Piping of HPI Pumps Not Considered in Operating Design.Caused by Failure to Remove Strainers Following Const.Strainers Removed

LER-1995-033-01, :on 951114,TS Surveillance Requirement Implementation Deficiencies Occurred.Caused by Lack of Documentation of Annunciation for Previous Surveillances. SDV Bypass Logic Were Satisfactorily Tested
type: Subject
label: 05000354/LER-1995-033-01, :on 951114,TS Surveillance Requirement Implementation Deficiencies Occurred.Caused by Lack of Documentation of Annunciation for Previous Surveillances. SDV Bypass Logic Were Satisfactorily Tested
page: https://kanterella.com/05000354/LER-2D1995-2D033-2D01-2C_-3Aon_951114-2CTS_Surveillance_Requirement_Implementation_Deficiencies_Occurred.Caused_by_Lack_of_Documentation_of_Annunciation_for_Previous_Su…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000354/LER-1995-033-01, :on 951114,TS Surveillance Requirement Implementation Deficiencies Occurred.Caused by Lack of Documentation of Annunciation for Previous Surveillances. SDV Bypass Logic Were Satisfactorily Tested

LER-1992-018-01, :on 920930,loss of 3A3-S Safety Bus Experienced When Bus Feeder Breaker Tripped Open on Degraded Voltage Condition.Caused by Personnel Error.Design Change Package Implementation Process Will Be Revised
type: Subject
label: 05000382/LER-1992-018-01, :on 920930,loss of 3A3-S Safety Bus Experienced When Bus Feeder Breaker Tripped Open on Degraded Voltage Condition.Caused by Personnel Error.Design Change Package Implementation Process Will Be Revised
page: https://kanterella.com/05000382/LER-2D1992-2D018-2D01-2C_-3Aon_920930-2Closs_of_3A3-2DS_Safety_Bus_Experienced_When_Bus_Feeder_Breaker_Tripped_Open_on_Degraded_Voltage_Condition.Caused_by_Personnel_Er…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000382/LER-1992-018-01, :on 920930,loss of 3A3-S Safety Bus Experienced When Bus Feeder Breaker Tripped Open on Degraded Voltage Condition.Caused by Personnel Error.Design Change Package Implementation Process Will Be Revised

LER-1985-016, :on 850703,ex-core Channel Failed to Meet Acceptance Criteria for Dropped Rod Load Runback Setpoint During Nuclear Instrumentation Sys Surveillance.Caused by Setpoint Drift.Setpoint Recalibr
type: Subject
label: 05000213/LER-1985-016, :on 850703,ex-core Channel Failed to Meet Acceptance Criteria for Dropped Rod Load Runback Setpoint During Nuclear Instrumentation Sys Surveillance.Caused by Setpoint Drift.Setpoint Recalibr
page: https://kanterella.com/05000213/LER-2D1985-2D016-2C_-3Aon_850703-2Cex-2Dcore_Channel_Failed_to_Meet_Acceptance_Criteria_for_Dropped_Rod_Load_Runback_Setpoint_During_Nuclear_Instrumentation_Sys_Surveil…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000213/LER-1985-016, :on 850703,ex-core Channel Failed to Meet Acceptance Criteria for Dropped Rod Load Runback Setpoint During Nuclear Instrumentation Sys Surveillance.Caused by Setpoint Drift.Setpoint Recalibr

LER-1985-054, :on 850906,08,11 & 17,containment Noble Gas & Iodine Radiation Monitors EMF39 & EMF40 Tripped.Caused by Increased Containment Activity Due to Fuel Rod Cladding Leaks.Monitor Setpoints Revised
type: Subject
label: 05000413/LER-1985-054, :on 850906,08,11 & 17,containment Noble Gas & Iodine Radiation Monitors EMF39 & EMF40 Tripped.Caused by Increased Containment Activity Due to Fuel Rod Cladding Leaks.Monitor Setpoints Revised
page: https://kanterella.com/05000413/LER-2D1985-2D054-2C_-3Aon_850906-2C08-2C11_-26_17-2Ccontainment_Noble_Gas_-26_Iodine_Radiation_Monitors_EMF39_-26_EMF40_Tripped.Caused_by_Increased_Containment_Activity…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000413/LER-1985-054, :on 850906,08,11 & 17,containment Noble Gas & Iodine Radiation Monitors EMF39 & EMF40 Tripped.Caused by Increased Containment Activity Due to Fuel Rod Cladding Leaks.Monitor Setpoints Revised

05000285/LER-1996-014, :on 961117,reactor Cooldown in Excess of Limits Occurred Due to Starting Reactor Coolant pumps.OP-2A & OI-RC-9 Will Be Revised
type: Subject
page: https://kanterella.com/05000285/LER-2D1996-2D014-2C_-3Aon_961117-2Creactor_Cooldown_in_Excess_of_Limits_Occurred_Due_to_Starting_Reactor_Coolant_pumps.OP-2D2A_-26_OI-2DRC-2D9_Will_Be_Revised
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000285/LER-1996-014, :on 961117,reactor Cooldown in Excess of Limits Occurred Due to Starting Reactor Coolant pumps.OP-2A & OI-RC-9 Will Be Revised

LER-1985-023, :on 850823,determined That Fire Protection Valves FP-V-231 & 234 Not Properly Tested.Caused by Misinterpretation of Tech Spec Requirements.Surveillance Procedure Sur 5.5-24 Revised
type: Subject
label: 05000213/LER-1985-023, :on 850823,determined That Fire Protection Valves FP-V-231 & 234 Not Properly Tested.Caused by Misinterpretation of Tech Spec Requirements.Surveillance Procedure Sur 5.5-24 Revised
page: https://kanterella.com/05000213/LER-2D1985-2D023-2C_-3Aon_850823-2Cdetermined_That_Fire_Protection_Valves_FP-2DV-2D231_-26_234_Not_Properly_Tested.Caused_by_Misinterpretation_of_Tech_Spec_Requirements…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000213/LER-1985-023, :on 850823,determined That Fire Protection Valves FP-V-231 & 234 Not Properly Tested.Caused by Misinterpretation of Tech Spec Requirements.Surveillance Procedure Sur 5.5-24 Revised

05000317/LER-1992-007, :on 921112,discovered Concern Re Shutting of ECCS min-flow Isolation Valves SI-659 & 660.Caused by Procedural Deficiency.Procedures & Testing Revised
type: Subject
page: https://kanterella.com/05000317/LER-2D1992-2D007-2C_-3Aon_921112-2Cdiscovered_Concern_Re_Shutting_of_ECCS_min-2Dflow_Isolation_Valves_SI-2D659_-26_660.Caused_by_Procedural_Deficiency.Procedures_-26_Te…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000317/LER-1992-007, :on 921112,discovered Concern Re Shutting of ECCS min-flow Isolation Valves SI-659 & 660.Caused by Procedural Deficiency.Procedures & Testing Revised

05000302/LER-1992-026, :on 921208,replacement of Failed RCS Flow Transmitter Caused Voluntary Entry Into TS 3.0.3.No Corrective Actions Planned
type: Subject
page: https://kanterella.com/05000302/LER-2D1992-2D026-2C_-3Aon_921208-2Creplacement_of_Failed_RCS_Flow_Transmitter_Caused_Voluntary_Entry_Into_TS_3.0.3.No_Corrective_Actions_Planned
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000302/LER-1992-026, :on 921208,replacement of Failed RCS Flow Transmitter Caused Voluntary Entry Into TS 3.0.3.No Corrective Actions Planned

LER-1992-023, :on 921110,oversight Discovered in Original App R Analysis Results in Operation Outside Design Basis. Analysis Failed to Realize That MUV-31 Could Fail While closed.MUV-31 Scenerio Reanalyzed
type: Subject
label: 05000302/LER-1992-023, :on 921110,oversight Discovered in Original App R Analysis Results in Operation Outside Design Basis. Analysis Failed to Realize That MUV-31 Could Fail While closed.MUV-31 Scenerio Reanalyzed
page: https://kanterella.com/05000302/LER-2D1992-2D023-2C_-3Aon_921110-2Coversight_Discovered_in_Original_App_R_Analysis_Results_in_Operation_Outside_Design_Basis._Analysis_Failed_to_Realize_That_MUV-2D31_C…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000302/LER-1992-023, :on 921110,oversight Discovered in Original App R Analysis Results in Operation Outside Design Basis. Analysis Failed to Realize That MUV-31 Could Fail While closed.MUV-31 Scenerio Reanalyzed

05000423/LER-1996-013-02, :on 960515,determined Design Deficiency in Residual Heat Removal System (Rhs).Caused by Original Plant Design.Corrective Actions Will Be Described in Supplement
type: Subject
page: https://kanterella.com/05000423/LER-2D1996-2D013-2D02-2C_-3Aon_960515-2Cdetermined_Design_Deficiency_in_Residual_Heat_Removal_System_-28Rhs-29.Caused_by_Original_Plant_Design.Corrective_Actions_Will_B…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000423/LER-1996-013-02, :on 960515,determined Design Deficiency in Residual Heat Removal System (Rhs).Caused by Original Plant Design.Corrective Actions Will Be Described in Supplement

05000423/LER-1996-007-01, :on 960403,CRS & Qs Sys Found Outside Design Basis Due to Design Errors.Restored Sys to Appropriate Design Basis Requirements Prior to Declaring Sys Inoperable
type: Subject
page: https://kanterella.com/05000423/LER-2D1996-2D007-2D01-2C_-3Aon_960403-2CCRS_-26_Qs_Sys_Found_Outside_Design_Basis_Due_to_Design_Errors.Restored_Sys_to_Appropriate_Design_Basis_Requirements_Prior_to_De…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000423/LER-1996-007-01, :on 960403,CRS & Qs Sys Found Outside Design Basis Due to Design Errors.Restored Sys to Appropriate Design Basis Requirements Prior to Declaring Sys Inoperable

Ups Power Distribution Panel.Caused by Inadvertent Actuation of Underfrequency Relay.Created Necessary Addl Physical Barriers Arounds Units 1 & 2
type: Subject
label: 05000353/LER-1996-002-02, :on 960315,ESFA Occurred Due to Loss of Power to Rps/Ups Power Distribution Panel.Caused by Inadvertent Actuation of Underfrequency Relay.Created Necessary Addl Physical Barriers Arounds Units 1 & 2
page: https://kanterella.com/05000353/LER-2D1996-2D002-2D02-2C_-3Aon_960315-2CESFA_Occurred_Due_to_Loss_of_Power_to_Rps/Ups_Power_Distribution_Panel.Caused_by_Inadvertent_Actuation_of_Underfrequency_Relay.C…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000353/LER-1996-002-02, :on 960315,ESFA Occurred Due to Loss of Power to Rps/Ups Power Distribution Panel.Caused by Inadvertent Actuation of Underfrequency Relay.Created Necessary Addl Physical Barriers Arounds Units 1 & 2

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

05000373/LER-1995-015-02, :on 950824,TS Fire Protection Valve Surveillance Was Missed Due to Insufficient Review of TS Fire Surveillance During Mod Process.Implemented Fire Watch in Unit 1 Csr
type: Subject
page: https://kanterella.com/05000373/LER-2D1995-2D015-2D02-2C_-3Aon_950824-2CTS_Fire_Protection_Valve_Surveillance_Was_Missed_Due_to_Insufficient_Review_of_TS_Fire_Surveillance_During_Mod_Process.Implement…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000373/LER-1995-015-02, :on 950824,TS Fire Protection Valve Surveillance Was Missed Due to Insufficient Review of TS Fire Surveillance During Mod Process.Implemented Fire Watch in Unit 1 Csr

LER-1995-014-02, :on 950816,reactor Scram Occurred Due to 1D RPS Trip Causing Group 1 Isolation.Upgrade Model of EPM Assembly Logic Cards Installed on Both Unit 1 RPS Motor Generator Sets & Upper Main Steam Tunnel Switches Calib
type: Subject
label: 05000373/LER-1995-014-02, :on 950816,reactor Scram Occurred Due to 1D RPS Trip Causing Group 1 Isolation.Upgrade Model of EPM Assembly Logic Cards Installed on Both Unit 1 RPS Motor Generator Sets & Upper Main Steam Tunnel Switches Calib
page: https://kanterella.com/05000373/LER-2D1995-2D014-2D02-2C_-3Aon_950816-2Creactor_Scram_Occurred_Due_to_1D_RPS_Trip_Causing_Group_1_Isolation.Upgrade_Model_of_EPM_Assembly_Logic_Cards_Installed_on_Both_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000373/LER-1995-014-02, :on 950816,reactor Scram Occurred Due to 1D RPS Trip Causing Group 1 Isolation.Upgrade Model of EPM Assembly Logic Cards Installed on Both Unit 1 RPS Motor Generator Sets & Upper Main Steam Tunnel Switches Calib

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

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

LER-1992-003, :on 920117,reactor Scrammed Due to Primary Uninterruptible Power Supply (UPS) Internal Failure.Standby UPS Placed in Svc Prior to Reactor Startup & Addl Troubleshooting to Be Conducted on Primary UPS
type: Subject
label: 05000325/LER-1992-003, :on 920117,reactor Scrammed Due to Primary Uninterruptible Power Supply (UPS) Internal Failure.Standby UPS Placed in Svc Prior to Reactor Startup & Addl Troubleshooting to Be Conducted on Primary UPS
page: https://kanterella.com/05000325/LER-2D1992-2D003-2C_-3Aon_920117-2Creactor_Scrammed_Due_to_Primary_Uninterruptible_Power_Supply_-28UPS-29_Internal_Failure.Standby_UPS_Placed_in_Svc_Prior_to_Reactor_St…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000325/LER-1992-003, :on 920117,reactor Scrammed Due to Primary Uninterruptible Power Supply (UPS) Internal Failure.Standby UPS Placed in Svc Prior to Reactor Startup & Addl Troubleshooting to Be Conducted on Primary UPS

Reactor Anticipatory Trip Occurred.Unit Stabilized at Hot Shutdown Conditions.Cause Unknown.Unit Restarted & Reached 100- Power on 840609
type: Subject
label: 05000287/LER-1984-004-02, :on 840607,w/unit at 20% Power,Turbine Generator/Reactor Anticipatory Trip Occurred.Unit Stabilized at Hot Shutdown Conditions.Cause Unknown.Unit Restarted & Reached 100% Power on 840609
page: https://kanterella.com/05000287/LER-2D1984-2D004-2D02-2C_-3Aon_840607-2Cw/unit_at_20-_Power-2CTurbine_Generator/Reactor_Anticipatory_Trip_Occurred.Unit_Stabilized_at_Hot_Shutdown_Conditions.Cause_Unkn…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000287/LER-1984-004-02, :on 840607,w/unit at 20% Power,Turbine Generator/Reactor Anticipatory Trip Occurred.Unit Stabilized at Hot Shutdown Conditions.Cause Unknown.Unit Restarted & Reached 100% Power on 840609

Sys Equipment
type: Subject
label: 05000352/LER-1995-002-01, :on 950221,dual Unit Scram Occurred Due to Offsite Electrical Transmission Disturbance.Changed Ground Fault Detection Relay Setttings for LGS Units 1 & 2 Main Transformers to Provide Better Coordination W/Sys Equipment
page: https://kanterella.com/05000352/LER-2D1995-2D002-2D01-2C_-3Aon_950221-2Cdual_Unit_Scram_Occurred_Due_to_Offsite_Electrical_Transmission_Disturbance.Changed_Ground_Fault_Detection_Relay_Setttings_for_L…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000352/LER-1995-002-01, :on 950221,dual Unit Scram Occurred Due to Offsite Electrical Transmission Disturbance.Changed Ground Fault Detection Relay Setttings for LGS Units 1 & 2 Main Transformers to Provide Better Coordination W/Sys Equipment

LER-1995-003, :on 950307,turbine Runback & RT Resulted from Oil Leak & Subsequent Pressure Loss in Unit 2 Turbine Generator Eg Control Sys.Attempted to Tighten Union Joint & Maintained Level in Eg Oil Reservoir
type: Subject
label: 05000301/LER-1995-003, :on 950307,turbine Runback & RT Resulted from Oil Leak & Subsequent Pressure Loss in Unit 2 Turbine Generator Eg Control Sys.Attempted to Tighten Union Joint & Maintained Level in Eg Oil Reservoir
page: https://kanterella.com/05000301/LER-2D1995-2D003-2C_-3Aon_950307-2Cturbine_Runback_-26_RT_Resulted_from_Oil_Leak_-26_Subsequent_Pressure_Loss_in_Unit_2_Turbine_Generator_Eg_Control_Sys.Attempted_to_Ti…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000301/LER-1995-003, :on 950307,turbine Runback & RT Resulted from Oil Leak & Subsequent Pressure Loss in Unit 2 Turbine Generator Eg Control Sys.Attempted to Tighten Union Joint & Maintained Level in Eg Oil Reservoir

Surveillance Activities Restricted
type: Subject
label: 05000348/LER-1995-003, :on 950206,determined That Train a of Ssps Potentially Susceptible to Failure in Event of Postulated High Energy Steamline Break.Caused by Spss Design. Maintenance/Surveillance Activities Restricted
page: https://kanterella.com/05000348/LER-2D1995-2D003-2C_-3Aon_950206-2Cdetermined_That_Train_a_of_Ssps_Potentially_Susceptible_to_Failure_in_Event_of_Postulated_High_Energy_Steamline_Break.Caused_by_Spss_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000348/LER-1995-003, :on 950206,determined That Train a of Ssps Potentially Susceptible to Failure in Event of Postulated High Energy Steamline Break.Caused by Spss Design. Maintenance/Surveillance Activities Restricted

LER-1995-002-05, :on 950208,Unit 1 Reactor Shutdown Commenced Due to Inability to Isolate Inboard Steam Supply to Rcic. PCIS Valve 1E51-F063 Declared Inoperable & Outboard Isolation Valve 1E51-F007 Closed & Deactivated
type: Subject
label: 05000373/LER-1995-002-05, :on 950208,Unit 1 Reactor Shutdown Commenced Due to Inability to Isolate Inboard Steam Supply to Rcic. PCIS Valve 1E51-F063 Declared Inoperable & Outboard Isolation Valve 1E51-F007 Closed & Deactivated
page: https://kanterella.com/05000373/LER-2D1995-2D002-2D05-2C_-3Aon_950208-2CUnit_1_Reactor_Shutdown_Commenced_Due_to_Inability_to_Isolate_Inboard_Steam_Supply_to_Rcic._PCIS_Valve_1E51-2DF063_Declared_Inop…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000373/LER-1995-002-05, :on 950208,Unit 1 Reactor Shutdown Commenced Due to Inability to Isolate Inboard Steam Supply to Rcic. PCIS Valve 1E51-F063 Declared Inoperable & Outboard Isolation Valve 1E51-F007 Closed & Deactivated

05000321/LER-1994-013, :on 941103,false Low Turbine Speed Signal Resulted in Inoperable HPCI Sys.Caused by Failure or Misadjustment of Turbine Magnetic Speed Pickup.Magnetic Speed Pickup Replaced
type: Subject
page: https://kanterella.com/05000321/LER-2D1994-2D013-2C_-3Aon_941103-2Cfalse_Low_Turbine_Speed_Signal_Resulted_in_Inoperable_HPCI_Sys.Caused_by_Failure_or_Misadjustment_of_Turbine_Magnetic_Speed_Pickup.Ma…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000321/LER-1994-013, :on 941103,false Low Turbine Speed Signal Resulted in Inoperable HPCI Sys.Caused by Failure or Misadjustment of Turbine Magnetic Speed Pickup.Magnetic Speed Pickup Replaced

LER-1994-012-03, :on 940811,experienced Inadvertent Main Steam Line Isolation at Power Due to Equipment Failure.Failed A516 Ssps Safeguards Output Driver Circuit Board & A315 Universal Logic Circuit Board Replaced
type: Subject
label: 05000456/LER-1994-012-03, :on 940811,experienced Inadvertent Main Steam Line Isolation at Power Due to Equipment Failure.Failed A516 Ssps Safeguards Output Driver Circuit Board & A315 Universal Logic Circuit Board Replaced
page: https://kanterella.com/05000456/LER-2D1994-2D012-2D03-2C_-3Aon_940811-2Cexperienced_Inadvertent_Main_Steam_Line_Isolation_at_Power_Due_to_Equipment_Failure.Failed_A516_Ssps_Safeguards_Output_Driver_Ci…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000456/LER-1994-012-03, :on 940811,experienced Inadvertent Main Steam Line Isolation at Power Due to Equipment Failure.Failed A516 Ssps Safeguards Output Driver Circuit Board & A315 Universal Logic Circuit Board Replaced

LER-1991-001-02, :on 910125,reactor Scram Occurred from 100- Power Due to Turbine Trip on High Reactor Water Level While Calibrating Feedwater Computer Point.Caused by Failure of Work Control Process.Calibrs Stopped
type: Subject
label: 05000324/LER-1991-001-02, :on 910125,reactor Scram Occurred from 100% Power Due to Turbine Trip on High Reactor Water Level While Calibrating Feedwater Computer Point.Caused by Failure of Work Control Process.Calibrs Stopped
page: https://kanterella.com/05000324/LER-2D1991-2D001-2D02-2C_-3Aon_910125-2Creactor_Scram_Occurred_from_100-_Power_Due_to_Turbine_Trip_on_High_Reactor_Water_Level_While_Calibrating_Feedwater_Computer_Poin…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000324/LER-1991-001-02, :on 910125,reactor Scram Occurred from 100% Power Due to Turbine Trip on High Reactor Water Level While Calibrating Feedwater Computer Point.Caused by Failure of Work Control Process.Calibrs Stopped

LER-1991-009, :on 910311,containment Ventilation Sys Effluent Pathway Not Being Monitored for Particulate & Iodine Activity Due to Personnel Error.Disciplinary Action Taken Against Responsible Individual
type: Subject
label: 05000368/LER-1991-009, :on 910311,containment Ventilation Sys Effluent Pathway Not Being Monitored for Particulate & Iodine Activity Due to Personnel Error.Disciplinary Action Taken Against Responsible Individual
page: https://kanterella.com/05000368/LER-2D1991-2D009-2C_-3Aon_910311-2Ccontainment_Ventilation_Sys_Effluent_Pathway_Not_Being_Monitored_for_Particulate_-26_Iodine_Activity_Due_to_Personnel_Error.Disciplin…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000368/LER-1991-009, :on 910311,containment Ventilation Sys Effluent Pathway Not Being Monitored for Particulate & Iodine Activity Due to Personnel Error.Disciplinary Action Taken Against Responsible Individual

05000266/LER-1994-003, :on 940217,reactor Coolant Sys Sample Line Declared Inoperable & Isolated.Caused by Failure of SC-955 as Result of Loss of Coolant Accident.Penetration P-28a on Units Isolated
type: Subject
page: https://kanterella.com/05000266/LER-2D1994-2D003-2C_-3Aon_940217-2Creactor_Coolant_Sys_Sample_Line_Declared_Inoperable_-26_Isolated.Caused_by_Failure_of_SC-2D955_as_Result_of_Loss_of_Coolant_Accident.…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000266/LER-1994-003, :on 940217,reactor Coolant Sys Sample Line Declared Inoperable & Isolated.Caused by Failure of SC-955 as Result of Loss of Coolant Accident.Penetration P-28a on Units Isolated

Iodine Filter Assemblies.Missing O-rings Replaced & Leak Test Conducted
type: Subject
label: 05000298/LER-1994-003, :on 940215,TS Violations Occurred Due to Inoperable Radiation Monitors.Caused by Improperly Assembled Particulate/Iodine Filter Assemblies.Missing O-rings Replaced & Leak Test Conducted
page: https://kanterella.com/05000298/LER-2D1994-2D003-2C_-3Aon_940215-2CTS_Violations_Occurred_Due_to_Inoperable_Radiation_Monitors.Caused_by_Improperly_Assembled_Particulate/Iodine_Filter_Assemblies.Missi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000298/LER-1994-003, :on 940215,TS Violations Occurred Due to Inoperable Radiation Monitors.Caused by Improperly Assembled Particulate/Iodine Filter Assemblies.Missing O-rings Replaced & Leak Test Conducted

LER-1994-001, :on 940208,automatic Actuation Feature of Halon Fire Suppression Sys for Afp Room & Vital Switch Room Disabled.Caused by Personnel Error.Hourly Fire Rounds Performed Until Halon Restored to Svc,
type: Subject
label: 05000266/LER-1994-001, :on 940208,automatic Actuation Feature of Halon Fire Suppression Sys for Afp Room & Vital Switch Room Disabled.Caused by Personnel Error.Hourly Fire Rounds Performed Until Halon Restored to Svc,
page: https://kanterella.com/05000266/LER-2D1994-2D001-2C_-3Aon_940208-2Cautomatic_Actuation_Feature_of_Halon_Fire_Suppression_Sys_for_Afp_Room_-26_Vital_Switch_Room_Disabled.Caused_by_Personnel_Error.Hourl…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000266/LER-1994-001, :on 940208,automatic Actuation Feature of Halon Fire Suppression Sys for Afp Room & Vital Switch Room Disabled.Caused by Personnel Error.Hourly Fire Rounds Performed Until Halon Restored to Svc,

05000282/LER-1993-014, :on 931116,determined Control Cables for Redundant Pressurizer Porvs,Found Touching,Violated Criteria for Physical Separation of Cables.Cables Repositioned & Secured
type: Subject
page: https://kanterella.com/05000282/LER-2D1993-2D014-2C_-3Aon_931116-2Cdetermined_Control_Cables_for_Redundant_Pressurizer_Porvs-2CFound_Touching-2CViolated_Criteria_for_Physical_Separation_of_Cables.Cabl…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000282/LER-1993-014, :on 931116,determined Control Cables for Redundant Pressurizer Porvs,Found Touching,Violated Criteria for Physical Separation of Cables.Cables Repositioned & Secured

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

LER-1993-007-01, :on 930705,TS Required Surveillance Was Not Performed Because of Inappropriate Action Because of Lack of Attention to Detail.Generated WO 93047633 to Perform Required Surveillance on Unit 1 IPE CA 9010
type: Subject
label: 05000369/LER-1993-007-01, :on 930705,TS Required Surveillance Was Not Performed Because of Inappropriate Action Because of Lack of Attention to Detail.Generated WO 93047633 to Perform Required Surveillance on Unit 1 IPE CA 9010
page: https://kanterella.com/05000369/LER-2D1993-2D007-2D01-2C_-3Aon_930705-2CTS_Required_Surveillance_Was_Not_Performed_Because_of_Inappropriate_Action_Because_of_Lack_of_Attention_to_Detail.Generated_WO_9…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000369/LER-1993-007-01, :on 930705,TS Required Surveillance Was Not Performed Because of Inappropriate Action Because of Lack of Attention to Detail.Generated WO 93047633 to Perform Required Surveillance on Unit 1 IPE CA 9010

LER-1993-014, :on 930316,small through-wall Leak Developed on High Pressure Side of SW Throttle Valve.Caused by Inadequate Valve Design.Frequency of Visual Insp of Valve Internals Will Be Increased to Once Per Cycle
type: Subject
label: 05000298/LER-1993-014, :on 930316,small through-wall Leak Developed on High Pressure Side of SW Throttle Valve.Caused by Inadequate Valve Design.Frequency of Visual Insp of Valve Internals Will Be Increased to Once Per Cycle
page: https://kanterella.com/05000298/LER-2D1993-2D014-2C_-3Aon_930316-2Csmall_through-2Dwall_Leak_Developed_on_High_Pressure_Side_of_SW_Throttle_Valve.Caused_by_Inadequate_Valve_Design.Frequency_of_Visual_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000298/LER-1993-014, :on 930316,small through-wall Leak Developed on High Pressure Side of SW Throttle Valve.Caused by Inadequate Valve Design.Frequency of Visual Insp of Valve Internals Will Be Increased to Once Per Cycle

202D Exceeded Max Allowed TS Leakage.Caused by Slightly Worn Seat Ring & Plug in Valve Not Fully Seating.Seat Ring Replaced
type: Subject
label: 05000245/LER-1993-003-02, :on 930426,discovered That Primary Containment Penetration X-25/202D Exceeded Max Allowed TS Leakage.Caused by Slightly Worn Seat Ring & Plug in Valve Not Fully Seating.Seat Ring Replaced
page: https://kanterella.com/05000245/LER-2D1993-2D003-2D02-2C_-3Aon_930426-2Cdiscovered_That_Primary_Containment_Penetration_X-2D25/202D_Exceeded_Max_Allowed_TS_Leakage.Caused_by_Slightly_Worn_Seat_Ring_-2…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000245/LER-1993-003-02, :on 930426,discovered That Primary Containment Penetration X-25/202D Exceeded Max Allowed TS Leakage.Caused by Slightly Worn Seat Ring & Plug in Valve Not Fully Seating.Seat Ring Replaced

05000280/LER-1988-038, :on 880928,three Recirculation Spray HXs Filled W/Svc Water Discovered.Caused by Leakage Past Normally Closed Recirculation Spray HX Inlet Isolation Valves.Samples Taken
type: Subject
page: https://kanterella.com/05000280/LER-2D1988-2D038-2C_-3Aon_880928-2Cthree_Recirculation_Spray_HXs_Filled_W/Svc_Water_Discovered.Caused_by_Leakage_Past_Normally_Closed_Recirculation_Spray_HX_Inlet_Isola…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000280/LER-1988-038, :on 880928,three Recirculation Spray HXs Filled W/Svc Water Discovered.Caused by Leakage Past Normally Closed Recirculation Spray HX Inlet Isolation Valves.Samples Taken

LER-1987-029, :on 871108,main Control Room Ventilation Isolated Due to High Voltage Output on Chlorine Detector. Caused by Increased Voltage Output Inducing Spurious Signal.Ventilation Sys Realigned
type: Subject
label: 05000280/LER-1987-029, :on 871108,main Control Room Ventilation Isolated Due to High Voltage Output on Chlorine Detector. Caused by Increased Voltage Output Inducing Spurious Signal.Ventilation Sys Realigned
page: https://kanterella.com/05000280/LER-2D1987-2D029-2C_-3Aon_871108-2Cmain_Control_Room_Ventilation_Isolated_Due_to_High_Voltage_Output_on_Chlorine_Detector._Caused_by_Increased_Voltage_Output_Inducing_S…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000280/LER-1987-029, :on 871108,main Control Room Ventilation Isolated Due to High Voltage Output on Chlorine Detector. Caused by Increased Voltage Output Inducing Spurious Signal.Ventilation Sys Realigned

LER-1988-003-01, :on 880221,23 & 24,secondary Side Contents of Steam Generators E-50A & E-50B Discharged to Lake Michigan as Continuous Release.Samples Disposed of Prior to Required Analyses.Caused by Procedure Deficiency
type: Subject
label: 05000255/LER-1988-003-01, :on 880221,23 & 24,secondary Side Contents of Steam Generators E-50A & E-50B Discharged to Lake Michigan as Continuous Release.Samples Disposed of Prior to Required Analyses.Caused by Procedure Deficiency
page: https://kanterella.com/05000255/LER-2D1988-2D003-2D01-2C_-3Aon_880221-2C23_-26_24-2Csecondary_Side_Contents_of_Steam_Generators_E-2D50A_-26_E-2D50B_Discharged_to_Lake_Michigan_as_Continuous_Release.Sa…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000255/LER-1988-003-01, :on 880221,23 & 24,secondary Side Contents of Steam Generators E-50A & E-50B Discharged to Lake Michigan as Continuous Release.Samples Disposed of Prior to Required Analyses.Caused by Procedure Deficiency

LER-1988-007, :on 880429,auxiliary Feedwater Actuation Sys Actuated.Caused by Surveillance Procedure RO-21 Inadequacy That Permitted Input of Test Signal to Result in Quick Open Signal Generation.Procedure Corrected & Tested
type: Subject
label: 05000255/LER-1988-007, :on 880429,auxiliary Feedwater Actuation Sys Actuated.Caused by Surveillance Procedure RO-21 Inadequacy That Permitted Input of Test Signal to Result in Quick Open Signal Generation.Procedure Corrected & Tested
page: https://kanterella.com/05000255/LER-2D1988-2D007-2C_-3Aon_880429-2Cauxiliary_Feedwater_Actuation_Sys_Actuated.Caused_by_Surveillance_Procedure_RO-2D21_Inadequacy_That_Permitted_Input_of_Test_Signal_to…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000255/LER-1988-007, :on 880429,auxiliary Feedwater Actuation Sys Actuated.Caused by Surveillance Procedure RO-21 Inadequacy That Permitted Input of Test Signal to Result in Quick Open Signal Generation.Procedure Corrected & Tested

LER-1987-037, :on 871106,licensee Failed to Take Compensatory Measures During Temporary Loss of Fire Suppression Sys. Caused by Misleading Plant Diagram.Change Request Initiated to Correct Misleading Diagram
type: Subject
label: 05000255/LER-1987-037, :on 871106,licensee Failed to Take Compensatory Measures During Temporary Loss of Fire Suppression Sys. Caused by Misleading Plant Diagram.Change Request Initiated to Correct Misleading Diagram
page: https://kanterella.com/05000255/LER-2D1987-2D037-2C_-3Aon_871106-2Clicensee_Failed_to_Take_Compensatory_Measures_During_Temporary_Loss_of_Fire_Suppression_Sys._Caused_by_Misleading_Plant_Diagram.Chang…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000255/LER-1987-037, :on 871106,licensee Failed to Take Compensatory Measures During Temporary Loss of Fire Suppression Sys. Caused by Misleading Plant Diagram.Change Request Initiated to Correct Misleading Diagram

LER-1987-035, :on 871015,LPSI Pump P-67A Manually Secured from Operation Due to Erratic Discharge Pressure & Flow. Caused by Improperly Placed Jumper.Review of Requirements & Controls on Work Planning Process in Progress
type: Subject
label: 05000255/LER-1987-035, :on 871015,LPSI Pump P-67A Manually Secured from Operation Due to Erratic Discharge Pressure & Flow. Caused by Improperly Placed Jumper.Review of Requirements & Controls on Work Planning Process in Progress
page: https://kanterella.com/05000255/LER-2D1987-2D035-2C_-3Aon_871015-2CLPSI_Pump_P-2D67A_Manually_Secured_from_Operation_Due_to_Erratic_Discharge_Pressure_-26_Flow._Caused_by_Improperly_Placed_Jumper.Revi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000255/LER-1987-035, :on 871015,LPSI Pump P-67A Manually Secured from Operation Due to Erratic Discharge Pressure & Flow. Caused by Improperly Placed Jumper.Review of Requirements & Controls on Work Planning Process in Progress

LER-1987-030, :on 870903,QA Personnel Identified That Safety Injection tank,T-82B (Bp;Tk),Not Being Sampled for Boron Concentration at Frequency Specified in Facility Tech Specs. Tech Spec Change Request Submitted on 870911
type: Subject
label: 05000255/LER-1987-030, :on 870903,QA Personnel Identified That Safety Injection tank,T-82B (Bp;Tk),Not Being Sampled for Boron Concentration at Frequency Specified in Facility Tech Specs. Tech Spec Change Request Submitted on 870911
page: https://kanterella.com/05000255/LER-2D1987-2D030-2C_-3Aon_870903-2CQA_Personnel_Identified_That_Safety_Injection_tank-2CT-2D82B_-28Bp-3BTk-29-2CNot_Being_Sampled_for_Boron_Concentration_at_Frequency_S…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000255/LER-1987-030, :on 870903,QA Personnel Identified That Safety Injection tank,T-82B (Bp;Tk),Not Being Sampled for Boron Concentration at Frequency Specified in Facility Tech Specs. Tech Spec Change Request Submitted on 870911

Overtime Limitation Criteria.Memo Issued as Part of Required Reading Program
type: Subject
label: 05000255/LER-1987-038, :on 871022,auxiliary Operator Had Worked 28 H in 48 H Period,Exceeding Work Hour Limitations.Caused by Operator Unfamiliarity W/Overtime Limitation Criteria.Memo Issued as Part of Required Reading Program
page: https://kanterella.com/05000255/LER-2D1987-2D038-2C_-3Aon_871022-2Cauxiliary_Operator_Had_Worked_28_H_in_48_H_Period-2CExceeding_Work_Hour_Limitations.Caused_by_Operator_Unfamiliarity_W/Overtime_Limit…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000255/LER-1987-038, :on 871022,auxiliary Operator Had Worked 28 H in 48 H Period,Exceeding Work Hour Limitations.Caused by Operator Unfamiliarity W/Overtime Limitation Criteria.Memo Issued as Part of Required Reading Program

LER-1987-009, :on 870325,auxiliary Feedwater Sys Actuation Signal Received Due to Low Water Level in Steam Generator. Caused by Shrinkage of Steam Generator Level During Testing. Personnel Informed of Circumstances of Event
type: Subject
label: 05000255/LER-1987-009, :on 870325,auxiliary Feedwater Sys Actuation Signal Received Due to Low Water Level in Steam Generator. Caused by Shrinkage of Steam Generator Level During Testing. Personnel Informed of Circumstances of Event
page: https://kanterella.com/05000255/LER-2D1987-2D009-2C_-3Aon_870325-2Cauxiliary_Feedwater_Sys_Actuation_Signal_Received_Due_to_Low_Water_Level_in_Steam_Generator._Caused_by_Shrinkage_of_Steam_Generator_L…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000255/LER-1987-009, :on 870325,auxiliary Feedwater Sys Actuation Signal Received Due to Low Water Level in Steam Generator. Caused by Shrinkage of Steam Generator Level During Testing. Personnel Informed of Circumstances of Event

05000296/LER-1997-001-04, :on 970305,loss of Offsite Power on Unit 3 During Refueling Outage Resulted from Shorted Component. Replaced Relays Involved in Event W/Less Sensitive Relays
type: Subject
page: https://kanterella.com/05000296/LER-2D1997-2D001-2D04-2C_-3Aon_970305-2Closs_of_Offsite_Power_on_Unit_3_During_Refueling_Outage_Resulted_from_Shorted_Component._Replaced_Relays_Involved_in_Event_W/Les…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000296/LER-1997-001-04, :on 970305,loss of Offsite Power on Unit 3 During Refueling Outage Resulted from Shorted Component. Replaced Relays Involved in Event W/Less Sensitive Relays

05000400/LER-1987-056, :on 870924,reactor Tripped Due to Deenergization of P-13 Permissive Bistable.Caused by Personnel Error Due to Insufficient Instructions.Procedure for Mod Implementation Revised
type: Subject
page: https://kanterella.com/05000400/LER-2D1987-2D056-2C_-3Aon_870924-2Creactor_Tripped_Due_to_Deenergization_of_P-2D13_Permissive_Bistable.Caused_by_Personnel_Error_Due_to_Insufficient_Instructions.Proced…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000400/LER-1987-056, :on 870924,reactor Tripped Due to Deenergization of P-13 Permissive Bistable.Caused by Personnel Error Due to Insufficient Instructions.Procedure for Mod Implementation Revised

LER-1987-037, :on 870621,manual Reactor Trip Initiated from 30- Power After Operating Main Feedwater Train Tripped. Caused by Failed Open Feedwater Pump Recirculation Valve. Circuit Repaired & Plant Returned to Svc
type: Subject
label: 05000400/LER-1987-037, :on 870621,manual Reactor Trip Initiated from 30% Power After Operating Main Feedwater Train Tripped. Caused by Failed Open Feedwater Pump Recirculation Valve. Circuit Repaired & Plant Returned to Svc
page: https://kanterella.com/05000400/LER-2D1987-2D037-2C_-3Aon_870621-2Cmanual_Reactor_Trip_Initiated_from_30-_Power_After_Operating_Main_Feedwater_Train_Tripped._Caused_by_Failed_Open_Feedwater_Pump_Recir…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000400/LER-1987-037, :on 870621,manual Reactor Trip Initiated from 30% Power After Operating Main Feedwater Train Tripped. Caused by Failed Open Feedwater Pump Recirculation Valve. Circuit Repaired & Plant Returned to Svc

LER-1987-036, :on 870621,air Roll of 1A-SA Diesel Engine Not Performed within 4 to 8 H After Engine Shutdown.Caused by Marking in Test Procedure Step as Not Applicable.Engine Air Rolled.No Accumulation of Water Detected
type: Subject
label: 05000400/LER-1987-036, :on 870621,air Roll of 1A-SA Diesel Engine Not Performed within 4 to 8 H After Engine Shutdown.Caused by Marking in Test Procedure Step as Not Applicable.Engine Air Rolled.No Accumulation of Water Detected
page: https://kanterella.com/05000400/LER-2D1987-2D036-2C_-3Aon_870621-2Cair_Roll_of_1A-2DSA_Diesel_Engine_Not_Performed_within_4_to_8_H_After_Engine_Shutdown.Caused_by_Marking_in_Test_Procedure_Step_as_Not…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000400/LER-1987-036, :on 870621,air Roll of 1A-SA Diesel Engine Not Performed within 4 to 8 H After Engine Shutdown.Caused by Marking in Test Procedure Step as Not Applicable.Engine Air Rolled.No Accumulation of Water Detected

LER-1987-015-01, :on 870715,technicians Failed to Deactivate Inoperable Containment Isolation Valve within 4 H as Required by Tech Specs.Caused by Personnel Error.Procedure Completion Responsibility Centralized
type: Subject
label: 05000251/LER-1987-015-01, :on 870715,technicians Failed to Deactivate Inoperable Containment Isolation Valve within 4 H as Required by Tech Specs.Caused by Personnel Error.Procedure Completion Responsibility Centralized
page: https://kanterella.com/05000251/LER-2D1987-2D015-2D01-2C_-3Aon_870715-2Ctechnicians_Failed_to_Deactivate_Inoperable_Containment_Isolation_Valve_within_4_H_as_Required_by_Tech_Specs.Caused_by_Personnel…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000251/LER-1987-015-01, :on 870715,technicians Failed to Deactivate Inoperable Containment Isolation Valve within 4 H as Required by Tech Specs.Caused by Personnel Error.Procedure Completion Responsibility Centralized

LER-1987-023, :on 870913,safety Injection Sys Actuation & Subsequent Reactor Trip Occurred.Caused by Component Failure & Personnel Error.Event Response Team Formed to Investigate Causes & Initiate Corrective Action
type: Subject
label: 05000250/LER-1987-023, :on 870913,safety Injection Sys Actuation & Subsequent Reactor Trip Occurred.Caused by Component Failure & Personnel Error.Event Response Team Formed to Investigate Causes & Initiate Corrective Action
page: https://kanterella.com/05000250/LER-2D1987-2D023-2C_-3Aon_870913-2Csafety_Injection_Sys_Actuation_-26_Subsequent_Reactor_Trip_Occurred.Caused_by_Component_Failure_-26_Personnel_Error.Event_Response_Te…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000250/LER-1987-023, :on 870913,safety Injection Sys Actuation & Subsequent Reactor Trip Occurred.Caused by Component Failure & Personnel Error.Event Response Team Formed to Investigate Causes & Initiate Corrective Action

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

05000315/LER-1994-012, :on 941205,noted That Vent Stack Particulate Filter Gamma Spectrum Results for 941130 Not Available for Review Due to Personnel Error.Backup Sample Analyzed & Evaluated
type: Subject
page: https://kanterella.com/05000315/LER-2D1994-2D012-2C_-3Aon_941205-2Cnoted_That_Vent_Stack_Particulate_Filter_Gamma_Spectrum_Results_for_941130_Not_Available_for_Review_Due_to_Personnel_Error.Backup_Sam…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000315/LER-1994-012, :on 941205,noted That Vent Stack Particulate Filter Gamma Spectrum Results for 941130 Not Available for Review Due to Personnel Error.Backup Sample Analyzed & Evaluated

Postulated Main Steam Line Failure Outside Containment Discovered by Ge.Caused by Failure to Consider Iodine Source Term.Procedure Re Cold Startup Changed
type: Subject
label: 05000397/LER-1991-024, :on 910909,unanalyzed Condition Associated W/ Postulated Main Steam Line Failure Outside Containment Discovered by Ge.Caused by Failure to Consider Iodine Source Term.Procedure Re Cold Startup Changed
page: https://kanterella.com/05000397/LER-2D1991-2D024-2C_-3Aon_910909-2Cunanalyzed_Condition_Associated_W/_Postulated_Main_Steam_Line_Failure_Outside_Containment_Discovered_by_Ge.Caused_by_Failure_to_Consi…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000397/LER-1991-024, :on 910909,unanalyzed Condition Associated W/ Postulated Main Steam Line Failure Outside Containment Discovered by Ge.Caused by Failure to Consider Iodine Source Term.Procedure Re Cold Startup Changed

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

LER-1998-009, :on 981223,noted That Facility Operated Outside of Design Basis.Caused by non-conservative MSLB Analysis Inputs.Will Review SR Component Differences Between Units & Will re-baseline LTOP Analysis.With
type: Subject
label: 05000335/LER-1998-009, :on 981223,noted That Facility Operated Outside of Design Basis.Caused by non-conservative MSLB Analysis Inputs.Will Review SR Component Differences Between Units & Will re-baseline LTOP Analysis.With
page: https://kanterella.com/05000335/LER-2D1998-2D009-2C_-3Aon_981223-2Cnoted_That_Facility_Operated_Outside_of_Design_Basis.Caused_by_non-2Dconservative_MSLB_Analysis_Inputs.Will_Review_SR_Component_Diffe…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000335/LER-1998-009, :on 981223,noted That Facility Operated Outside of Design Basis.Caused by non-conservative MSLB Analysis Inputs.Will Review SR Component Differences Between Units & Will re-baseline LTOP Analysis.With

ML17229A690
type: Subject
page: https://kanterella.com/ML17229A690
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: ML17229A690

05000454/LER-2012-003, Regarding Containment Area Radiation Monitors Inoperable for Longer than Allowed by Technical Specifications Due to Inadequate Procedure Controls
type: Subject
page: https://kanterella.com/05000454/LER-2D2012-2D003-2C_Regarding_Containment_Area_Radiation_Monitors_Inoperable_for_Longer_than_Allowed_by_Technical_Specifications_Due_to_Inadequate_Procedure_Controls
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000454/LER-2012-003, Regarding Containment Area Radiation Monitors Inoperable for Longer than Allowed by Technical Specifications Due to Inadequate Procedure Controls

LER-1998-002-01, :on 980227,480 V Switchgear Room Fire Barrier Deficiency Was Noted.Caused by Inadequate Fire Barrier Spec. Two of Seven Fire Zones Where Conduit Fire Barriers Are Installed Were Reviewed,No Deficiencies Found
type: Subject
label: 05000219/LER-1998-002-01, :on 980227,480 V Switchgear Room Fire Barrier Deficiency Was Noted.Caused by Inadequate Fire Barrier Spec. Two of Seven Fire Zones Where Conduit Fire Barriers Are Installed Were Reviewed,No Deficiencies Found
page: https://kanterella.com/05000219/LER-2D1998-2D002-2D01-2C_-3Aon_980227-2C480_V_Switchgear_Room_Fire_Barrier_Deficiency_Was_Noted.Caused_by_Inadequate_Fire_Barrier_Spec._Two_of_Seven_Fire_Zones_Where_Co…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000219/LER-1998-002-01, :on 980227,480 V Switchgear Room Fire Barrier Deficiency Was Noted.Caused by Inadequate Fire Barrier Spec. Two of Seven Fire Zones Where Conduit Fire Barriers Are Installed Were Reviewed,No Deficiencies Found

LER-1998-003-01, :on 980303,failure to Perform High Drywell Pressure Check Surveillance Was Noted.Caused by Inadequate Procedure.Reviewed & Revised Appropriate Plant Documents & Provided Operator Training
type: Subject
label: 05000219/LER-1998-003-01, :on 980303,failure to Perform High Drywell Pressure Check Surveillance Was Noted.Caused by Inadequate Procedure.Reviewed & Revised Appropriate Plant Documents & Provided Operator Training
page: https://kanterella.com/05000219/LER-2D1998-2D003-2D01-2C_-3Aon_980303-2Cfailure_to_Perform_High_Drywell_Pressure_Check_Surveillance_Was_Noted.Caused_by_Inadequate_Procedure.Reviewed_-26_Revised_Approp…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000219/LER-1998-003-01, :on 980303,failure to Perform High Drywell Pressure Check Surveillance Was Noted.Caused by Inadequate Procedure.Reviewed & Revised Appropriate Plant Documents & Provided Operator Training

Missing Conduit Hold Down Restraints on VC Chiller Skids.Caused by Personnel Walking on Equipment.Generated Work Requests
type: Subject
label: 05000461/LER-1998-011, :on 980312,CR Ventilation Sys Was Declared Inoperable Due to Broken/Missing Conduit Hold Down Restraints on VC Chiller Skids.Caused by Personnel Walking on Equipment.Generated Work Requests
page: https://kanterella.com/05000461/LER-2D1998-2D011-2C_-3Aon_980312-2CCR_Ventilation_Sys_Was_Declared_Inoperable_Due_to_Broken/Missing_Conduit_Hold_Down_Restraints_on_VC_Chiller_Skids.Caused_by_Personnel…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000461/LER-1998-011, :on 980312,CR Ventilation Sys Was Declared Inoperable Due to Broken/Missing Conduit Hold Down Restraints on VC Chiller Skids.Caused by Personnel Walking on Equipment.Generated Work Requests

05000334/LER-1998-028, :on 980811,reactor Trip Occurred.Caused by Cognitive Error by Involved Licensed & non-licensed Shift Operating personnel.F-MS-475 Repaired & Returned to Svc. with
type: Subject
page: https://kanterella.com/05000334/LER-2D1998-2D028-2C_-3Aon_980811-2Creactor_Trip_Occurred.Caused_by_Cognitive_Error_by_Involved_Licensed_-26_non-2Dlicensed_Shift_Operating_personnel.F-2DMS-2D475_Repair…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000334/LER-1998-028, :on 980811,reactor Trip Occurred.Caused by Cognitive Error by Involved Licensed & non-licensed Shift Operating personnel.F-MS-475 Repaired & Returned to Svc. with

LER-1997-012, :on 970404,programmatic Breakdown of Overtime Program Occurred.Caused by Lack of Mgt Oversight in Administering & Implementing Plants Working Hour Policy. Ltr Issued Reemphasizing Working Hour Policy
type: Subject
label: 05000382/LER-1997-012, :on 970404,programmatic Breakdown of Overtime Program Occurred.Caused by Lack of Mgt Oversight in Administering & Implementing Plants Working Hour Policy. Ltr Issued Reemphasizing Working Hour Policy
page: https://kanterella.com/05000382/LER-2D1997-2D012-2C_-3Aon_970404-2Cprogrammatic_Breakdown_of_Overtime_Program_Occurred.Caused_by_Lack_of_Mgt_Oversight_in_Administering_-26_Implementing_Plants_Working_…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000382/LER-1997-012, :on 970404,programmatic Breakdown of Overtime Program Occurred.Caused by Lack of Mgt Oversight in Administering & Implementing Plants Working Hour Policy. Ltr Issued Reemphasizing Working Hour Policy

LER-1994-013, :on 941111,reactor Water Cleanup Sys Isolation Due to Failed Head Gasket on Filter Demineralizer 1T203A. Insp of Flange & Closure Bolts on 1T203A Filter Demineralizer Revealed No Damage
type: Subject
label: 05000331/LER-1994-013, :on 941111,reactor Water Cleanup Sys Isolation Due to Failed Head Gasket on Filter Demineralizer 1T203A. Insp of Flange & Closure Bolts on 1T203A Filter Demineralizer Revealed No Damage
page: https://kanterella.com/05000331/LER-2D1994-2D013-2C_-3Aon_941111-2Creactor_Water_Cleanup_Sys_Isolation_Due_to_Failed_Head_Gasket_on_Filter_Demineralizer_1T203A._Insp_of_Flange_-26_Closure_Bolts_on_1T2…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000331/LER-1994-013, :on 941111,reactor Water Cleanup Sys Isolation Due to Failed Head Gasket on Filter Demineralizer 1T203A. Insp of Flange & Closure Bolts on 1T203A Filter Demineralizer Revealed No Damage

Associated CR in Full Out Position.Caused by Human Error.Hcu Returned to Svc & CR Fully Inserted
type: Subject
label: 05000219/LER-1994-013, :on 940726,TS Shutdown Margin Limit Exceeded Due to HCU 06-19 Being Tagged Out of Svc W/Associated CR in Full Out Position.Caused by Human Error.Hcu Returned to Svc & CR Fully Inserted
page: https://kanterella.com/05000219/LER-2D1994-2D013-2C_-3Aon_940726-2CTS_Shutdown_Margin_Limit_Exceeded_Due_to_HCU_06-2D19_Being_Tagged_Out_of_Svc_W/Associated_CR_in_Full_Out_Position.Caused_by_Human_Err…
wiki namespace: 0
wiki page content language: en
NRC form: NRC Form 3MA
wiki page sort key: 05000219/LER-1994-013, :on 940726,TS Shutdown Margin Limit Exceeded Due to HCU 06-19 Being Tagged Out of Svc W/Associated CR in Full Out Position.Caused by Human Error.Hcu Returned to Svc & CR Fully Inserted

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