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| Issue date | Title | Topic | |
|---|---|---|---|
| 05000458/LER-1986-009, Corrected LER 86-009-00:on 860114,radwaste Liquid Effluent Monitor Sample Pump Not Started During Radioactive Liquid Discharge.Caused by Miscommunication & Procedure Ambiguities.Procedures Revised | 13 February 1986 | Corrected LER 86-009-00:on 860114,radwaste Liquid Effluent Monitor Sample Pump Not Started During Radioactive Liquid Discharge.Caused by Miscommunication & Procedure Ambiguities.Procedures Revised | |
| 05000458/LER-1987-001, Corrected LER 87-001-00:on 870108,discovered That Main Plant & Fuel Bldg Exhaust Radiation Monitor Particulate & Iodine Samplers Isolated Since 870107.Caused by Operator Error. Operator Aid Issued | 9 February 1987 | Corrected LER 87-001-00:on 870108,discovered That Main Plant & Fuel Bldg Exhaust Radiation Monitor Particulate & Iodine Samplers Isolated Since 870107.Caused by Operator Error. Operator Aid Issued | |
| 05000458/LER-1990-022 | 18 June 1990 | LER 90-022-00:on 900518,HPCS Sys Declared Inoperable & 14-day Shutdown Limiting Condition for Operation Entered Due to Inoperative Suppression Pool Level Transmitter.Caused by Personnel Error.Reactor Operators trained.W/900618 Ltr | Time of Discovery Fuel cladding |
| 05000458/LER-1993-010 | 16 August 1993 | LER 93-010-01:on 930514,SDC Loss for Three Minutes When SDC Suction Valves Closed.Caused by Failure to Identify Need for Compensatory Measures.Revised Procedural Guidance Clarifying Valve isolation.W/930816 Ltr | |
| 05000458/LER-1993-012 | 26 August 1993 | LER 93-012-01:on 930603,deficiency in Plant Surveillance Test Procedures Identified.Caused by Inattention to Detail During Initial Procedure.Surveillance Test Procedures revised.W/930826 Ltr | Time of Discovery |
| 05000458/LER-1993-015 | 23 August 1993 | LER 93-015-00:on 930723,discovered Time Response Testing of Isolation Instrumentation for RWCU & RCIC Sys Not Performed at Intervals Required by Tss.Caused by Scheduling Error & Misinterpretation of Ts.Schedule revised.W/930824 Ltr | |
| 05000458/LER-1993-016 | 27 August 1993 | LER 93-016-00:on 930727,HPCS Sys Actuation Occurred Due to Improperly Prepared Rev to Surveillance Test Procedure. Changed Surveillance Procedure STP-051-4811.W/930827 Ltr | Reactor Vessel Water Level |
| ML17279A191 | 7 April 1987 | Comparision of Electrical Design of Wye Pattern Globe Valve Actuator W/Ball Valve,Hanford 2 & River Bend Design. Five Oversize Drawings Encl | |
| ML18010A952 | 30 November 1992 | NRC Licensing Submittal Review of Licensing Conditions Imposed by NUREG-1216. | Nondestructive Examination Liquid penetrant |
| ML18010B084 | 5 May 1993 | NRC Licensing Submittal Review of Licensing Conditions Imposed by NUREG-1216. | Safe Shutdown Boric Acid Shutdown Margin Loop seal Stroke time Temporary Modification Stress corrosion cracking Liquid penetrant Overspeed trip |
| ML19208B563 | 12 July 1979 | Statement of Safety Implication Re Discontinuities in K-bevel Area of T Weld Which May Lead to Unacceptable Stresses & Deformations During Plant Operation | |
| ML19210E606 | 30 November 1979 | Alternatives Studied to Minimize Impact on Port Hudson Battlefield Historic Natl Landmark. One Oversize Map Encl & Available in Central Files Only | |
| ML19225C263 | 27 June 1979 | Deficiency Re Cadsleeve Welds Mfg by Graver Energy Sys & Produced by Semiautomatic Welding Procedure.All Defective Cadsleeves Will Be Replaced Using Manual Welding Process W/Increased Inprocess Controls | |
| ML19282B364 | 28 February 1979 | Alligator Bayou Flood Study,Present Bayou Hydrology. | |
| ML19290D658 | 3 December 1979 | Deficiency Rept Re Acceptance Testing of Concrete Matls. on 790925-26,Southwestern Labs QA Audits Revealed That QA Requirements Re Calibr & Shop Practices Had Not Been Met. Caused by Noncompliance W/Manual.Rept by 791230 | |
| ML19296A834 | 3 December 1979 | Advises That Rept on Protential Deficiency Reported 791105 Re NDT for Fabrication of Primary Shield Wall Will Be Provided by 800105 | Non-Destructive Examination |
| ML19296B998 | 31 December 1979 | Final Deficiency Rept:On 791203,informed NRC of Deficiency in QC of Concrete Testing Svcs by Southwestern Labs.Caused by Errors in Testing Program.Concrete Placed Prior to 791102 Retested by Pittsburgh Testing Labs | |
| ML19296C162 | 12 November 1979 | Interim Deficiency Rept Re T Weld Cracking.S&W Performing Metallurgical Analysis of Test Specimens & Graver Engineering Reviewing Voltage Variation & Bead Shape.Rework & Repair or Replacement Planned | |
| ML19316B061 | 22 May 1980 | Deficiency Rept Re Diesel Generator Bldg Concrete Matl Cold Joint.Equipment Failure Did Not Represent Breakdown in QA Program.Structural Analysis Indicated Unplanned Const Joint Did Not Impair Structural Integrity or Performance of Matl | |
| ML19323A404 | 14 April 1980 | Annual Financial Rept 1979 | |
| ML19323G733 | 22 April 1980 | Advises That Potential Deficiency Re Concrete Cold Joint Does Not Appear to Represent Significant Deficiency Reportable Under 10CFR50.55(e).Results of Final Analysis Will Be Forwarded within 30 Days | |
| ML19324B622 | 27 October 1989 | LER 89-034-00:on 890930,determined That 10 H Run of Standby Gas Treatment Sys Train B Not Performed within Allowable Surveillance Tolerance Which Had Ended on 890904.Caused by Human Error.Operations Personnel trained.W/891027 Ltr | |
| ML19325D132 | 30 September 1989 | Monthly Operating Rept for Sept 1989 for River Bend Station Unit 1.W/891013 Ltr | |
| ML19325D493 | 16 October 1989 | LER 89-033-00:on 890916,electrical Power Lost to Div II 120 Volt Ac Distribution Panel,Resulting in auto-start of Div II Standby Gas Treatment & Annulus Mixing Sys.Caused by Failure of Elgar Power Line Conditioning transformer.W/891016 Ltr | |
| ML19325E661 | 27 October 1989 | LER 89-035-00:on 890930,reactor Automatically Scrammed During Performance of Routine Reactor Protection Sys.Caused by Defective Test Switch in Reactor Protection Sys.Test Switch Replaced Via Prompt Maint Work order.W/891027 Ltr | Safe Shutdown Half scram |
| ML19325E727 | 20 October 1989 | Part 21 Rept Re Defect in Eight GE Type CR 2940 Control Switches at Plant.Initial Condition Found on 890930.Contacts 3 & 4 for All Switches in Plant Sys Verified to Be in Correct Position for Intended Application | |
| ML19327B100 | 16 October 1989 | Special Rept:On 890620 & 26,temp in Diesel Generator 1A & 1B Control Room Found Above Tech Spec Limit of 104 F Greater than 8 H.Caused by Heat Generated Inside Bldg,High Outside Ambient Temp & Insufficient Ventilation | |
| ML19330C488 | 7 July 1980 | Final Deficiency Rept Re Use of Improperly Qualified 67 & 8 Concrete Aggregate in Category 1 Structures.Investigation Complete.No Reportable Deficiency Exists | |
| ML19332B938 | 14 November 1989 | Special Rept:On 891017,invalid Failure of Div 1 Diesel Generator Occurred Due to Trip.Trip Caused by High Vibration Signal from Turbocharger Vibration Switch.Switch Reset Per Maint Work Order R056445 | |
| ML19332B991 | 14 November 1989 | Special Rept:On 890620,temp in Diesel Generator Control Room Identified as Above Tech Spec 3/4.7.8 Limit for Greater than 8 H.Similar Event Noted on 890626.Caused by Heat,High Outside Ambient Temps & Insufficient Ventilation | |
| ML19332C536 | 16 November 1989 | LER 89-036-00:on 891017,reported That Various motor-operated Valves Energized Contrary to Plant Fire Hazard Analyses. Caused by Failure to Implement Design Documents.Valves Reanalyzed & Procedures revised.W/891116 Ltr | Safe Shutdown Fire Barrier |
| ML19332C789 | 31 October 1989 | Monthly Operating Rept for Oct 1989 for River Bend Station, Unit 1.W/891114 Ltr | |
| ML19332E865 | 28 November 1989 | LER 88-018-03:on 880825,reactor Automatically Scrammed Due to Turbine Control Valve Fast Closure.Casued by Loss of Main Generator Field Excitation Resulting in Generator & Turbine Trips.Preventive Maint Procedure revised.W/891128 Ltr | Safe Shutdown Slow transfer |
| ML19341D704 | 3 April 1981 | Annual Financial Rept 1980 | |
| ML19343B501 | 8 December 1980 | Part 21 Rept Re Reactor Protection Sys Flexible Conduit Defect Causing Hot Shorts If Improperly Grounded.Caused by Paint on Panel Surfaces or High Resistance Connection to Panel Survaces Where Termination Modules Are Mounted | Hot Short |
| ML19347B508 | 12 September 1980 | Interim Deficiency Rept Re Incorrect Input in Calculations Used to Generate Amplified Response Spectra of Reactor Bldg Structures.Detailed Review Initiated & Rept to Be Submitted Pending Review Findings | |
| ML19347F820 | 31 December 1980 | Interim Deficiency Rept Re Incorrect Input to Calculations to Generate Amplified Response Spectra for Reactor Bldg Structures.Error Has Been Corrected.Final Analysis Will Be Sent by 810401 | |
| ML19351A464 | 8 December 1989 | LER 89-037-00:on 891108,Div II Control Bldg Ventilation Sys Isolated & Filtration Unit Automatically Initiated.Caused by Spurious Signal from Control Bldg Intake Radiation Monitor. Voltage Suppressors Installed on monitors.W/891208 Ltr | |
| ML19351A658 | 14 December 1989 | Special Rept:On 891114,trip Occurred on Div I Diesel Generator 1EGS*EG1A.Caused by Defective High Bearing Temp Detector & Water in Plastic Tubing Used to Connect Test Gauge.Shutdown Logic Board & Defective Connector Replaced | |
| ML19351A671 | 30 November 1989 | Monthly Operating Rept for Nov 1989 for River Bend Station Unit 1.W/891213 Ltr | |
| ML19351A676 | 13 December 1989 | LER 89-038-00:on 891113,unplanned Loss of Div I 125 Volt Dc Bus Occurred.Caused by Failure to Adequately Verify Clearance Boundaries.Power Restored to Bus & Isolations reset.W/891213 Ltr | |
| ML19354D400 | 27 October 1989 | Informational Rept:On 890928,field Engineer Made Emergency Exit from High Radiation Area Through High Radiation Door AB78-01.Total Exposure Received by Engineer Was 10 Mr.Door Not Required to Be Locked & Therefore Lock on Door Defeated | High Radiation Area |
| ML20003C845 | 24 February 1981 | Interim Deficiency Rept Re Overturning of Primary Containment Shield Wall,Initially Reported on 810126. Nonconformance Rept Has Been Initiated to Address Damage to Shield Wall.Next Rept Will Be Forwarded within 60 Days | |
| ML20003H732 | 5 May 1981 | Annual Financial Rept 1979 | |
| ML20005A434 | 23 June 1981 | Final Deficiency Rept Re Overturning of Primary Shield Wall During Const Movement.Base Plate Is Being Reworked to Restore to Original Design Conditions.Attachments to Base Plate Will Be Replaced | |
| ML20005E138 | 26 December 1989 | LER 89-041-00:on 891125,unplanned ESF Actuation Occurred as Result of Two Leads Shorted Together During Testing of Control Circuitry,Causing Valve Isolation from Suppression Pool.Sys Lineup Restored to Normal position.W/891226 Ltr | |
| ML20005E851 | 2 January 1990 | LER 89-042-01:on 891201,main Turbine Generator Tripped, Resulting in Reactor Scram.Caused by Sensing Fault on Offsite 230 Kv Line.Sys Maint Procedure Being Revised to Include Test of Failed Portion of relay.W/900102 Ltr | Safe Shutdown Slow transfer |
| ML20005E852 | 2 January 1990 | LER 89-043-00:on 891201.two Outboard MSIVs Inoperable Due to Failure of Corresponding Fast Closure solenoid-operated Valve.Caused by Incomplete Removal of Silicone Lubricant. Lubricant Removed by Application of Acetone.W/900102 Ltr | |
| ML20005F856 | 8 January 1990 | Special Rept:On 891211,invalid Failure of Div II Diesel Generator Occurred During Monthly Surveillance Test Procedure STP-309-0202.Caused by Failed GE Breaker in Exhaust Fan.Breaker Replaced & Generator Returned to Svc | |
| ML20005G164 | 10 January 1990 | LER 89-044-00:on 891211,unplanned ESF Actuation Occurred, Resulting in Isolation of Rcic.Caused by Technician Failing to Perform Steps of Surveillance Test Procedure in Sequence.Div II Isolation Signal reset.W/900110 Ltr |