05000361/LER-1999-005-01, :on 990831,loss of Physical Separation in Control Room,Occurred.Caused by Personnel Error.Creacus Train a Was Returned to Standby on 9908311999-09-23023 September 1999
- on 990831,loss of Physical Separation in Control Room,Occurred.Caused by Personnel Error.Creacus Train a Was Returned to Standby on 990831
05000206/LER-1999-001-02, :on 990808,unattended Security Weapon Was Discovered Inside Pa.Caused by Posted Security Officer Falling Asleep.Officer Was Relieved of Duties,Pa Access Was Removed & Officer Was Placed on Investigatory Suspension1999-08-31031 August 1999
- on 990808,unattended Security Weapon Was Discovered Inside Pa.Caused by Posted Security Officer Falling Asleep.Officer Was Relieved of Duties,Pa Access Was Removed & Officer Was Placed on Investigatory Suspension
05000361/LER-1999-004-01, :on 990708,automatic Tgis Actuation Occurred. Caused by Small Leak in Suction Side of Tgis Train a Sample Pump.Small Leak Repaired1999-08-0606 August 1999
- on 990708,automatic Tgis Actuation Occurred. Caused by Small Leak in Suction Side of Tgis Train a Sample Pump.Small Leak Repaired
05000362/LER-1999-005, :on 990630,discovered LTOP Sys Relief Valve Setpoint Was Higher than Allowed by Ts.Cause Indeterminate. Subject Valve Will Be Disassembled & Inspected to Determine Caused of High Setpoint.With1999-07-28028 July 1999
- on 990630,discovered LTOP Sys Relief Valve Setpoint Was Higher than Allowed by Ts.Cause Indeterminate. Subject Valve Will Be Disassembled & Inspected to Determine Caused of High Setpoint.With
05000362/LER-1999-006, :on 990623,EDG 3G003 Was Inadvertently Made Inoperable.Caused by Operators Aligning EDG to Inoperable Automatic Voltage Regulator.Licensee Will Revise Process of Locating Tags.With1999-07-26026 July 1999
- on 990623,EDG 3G003 Was Inadvertently Made Inoperable.Caused by Operators Aligning EDG to Inoperable Automatic Voltage Regulator.Licensee Will Revise Process of Locating Tags.With
05000362/LER-1999-003-01, :on 990513,reactor Manually Tripped Due to Loss of Main Feedwater.Caused by Open Relay Contact in Output of Feedwater Regulation Control Sys.Faulty Relay Was Replaced1999-06-11011 June 1999
- on 990513,reactor Manually Tripped Due to Loss of Main Feedwater.Caused by Open Relay Contact in Output of Feedwater Regulation Control Sys.Faulty Relay Was Replaced
05000362/LER-1999-004, :on 990515,reactor Manually Tripped Due to Feedwater Control Valve Opening.Caused by Faulty Valve Positioner.Faulty Positioner Was Replaced1999-06-11011 June 1999
- on 990515,reactor Manually Tripped Due to Feedwater Control Valve Opening.Caused by Faulty Valve Positioner.Faulty Positioner Was Replaced
05000362/LER-1999-002-01, :on 990328,RWST Outlet Isolation Valve Failed to Open After Being Closed for Testing.Caused by Degradation of Valve.Rwst Oulet Valve Was Repaired.With1999-05-20020 May 1999
- on 990328,RWST Outlet Isolation Valve Failed to Open After Being Closed for Testing.Caused by Degradation of Valve.Rwst Oulet Valve Was Repaired.With
05000362/LER-1999-001-01, :on 990211,TS 3.0.3 Entered Due to Both Chilled Water Trains Being Inoperable.Warm Main Condenser Discharged Water Diverted in Salt Water Cooling (Swc)(Bs) Intake.With1999-03-12012 March 1999
- on 990211,TS 3.0.3 Entered Due to Both Chilled Water Trains Being Inoperable.Warm Main Condenser Discharged Water Diverted in Salt Water Cooling (Swc)(Bs) Intake.With
05000361/LER-1999-002, :on 990208,pressurizer Safety Valves Were Above TS Limit.Caused by Setpoint Drift.Sce Submitted License Amend Application on 980904 Requesting Tolerence Be Changed to +3/-2%.With1999-03-10010 March 1999
- on 990208,pressurizer Safety Valves Were Above TS Limit.Caused by Setpoint Drift.Sce Submitted License Amend Application on 980904 Requesting Tolerence Be Changed to +3/-2%.With
05000361/LER-1999-001, :on 990201,automatic Start of EDG Was Noted. Caused by Workers Closing Breaker 2A0418 by Discharging Closing Springs.Operators Restored SDC in Approx 26 Minutes. with1999-03-0303 March 1999
- on 990201,automatic Start of EDG Was Noted. Caused by Workers Closing Breaker 2A0418 by Discharging Closing Springs.Operators Restored SDC in Approx 26 Minutes. with
05000361/LER-1998-021, :on 980903,train B Ecw Chiller Failed to Start Using CR Start Push Button.Caused by Incorrect Wiring of Switch by Personnel.Wiring Was Corrected & Chiller Was Declared Operable on 9809261998-10-26026 October 1998
- on 980903,train B Ecw Chiller Failed to Start Using CR Start Push Button.Caused by Incorrect Wiring of Switch by Personnel.Wiring Was Corrected & Chiller Was Declared Operable on 980926
05000361/LER-1998-020, :on 980806,determined That Ecw Sys Was Inoperable.Caused by Faulty Temp Control Unit.Temp Control Unit Was Replaced & Chiller Performed Satisfactorily1998-10-26026 October 1998
- on 980806,determined That Ecw Sys Was Inoperable.Caused by Faulty Temp Control Unit.Temp Control Unit Was Replaced & Chiller Performed Satisfactorily
05000361/LER-1998-004-01, :on 980211,diesel Fuel Oil Particulates - ASTM Test Methods Yield Varying Results Were Received.Caused by Unexpected Variations Obtained from Different Test Methods. Fuel Oil Filtered & Confirmed by Reanalysis1998-09-0101 September 1998
- on 980211,diesel Fuel Oil Particulates - ASTM Test Methods Yield Varying Results Were Received.Caused by Unexpected Variations Obtained from Different Test Methods. Fuel Oil Filtered & Confirmed by Reanalysis
05000361/LER-1998-011, :on 980617,determined That Setpoints for High Log Power Bypass Automatic Removal Had Not Been Verified IAW Ts.Caused by Log Power Not Satisfying TS as Written.Utils Investigation If Ongoing & LER Will Be Revised by 9809301998-07-17017 July 1998
- on 980617,determined That Setpoints for High Log Power Bypass Automatic Removal Had Not Been Verified IAW Ts.Caused by Log Power Not Satisfying TS as Written.Utils Investigation If Ongoing & LER Will Be Revised by 980930
05000206/LER-1998-004, :on 980323,safeguards Drawing Was Inappropriately Decontrolled.Caused by Personnel Error. Revised Procedure for Decontrolling SI & Has Established New Detailed Process for SCE to More Effectively Control SI1998-07-10010 July 1998
- on 980323,safeguards Drawing Was Inappropriately Decontrolled.Caused by Personnel Error. Revised Procedure for Decontrolling SI & Has Established New Detailed Process for SCE to More Effectively Control SI
05000361/LER-1996-012, :on 960226,condensate Storage Tank Outside Design Basis Occurred.Caused by Several Mechanisms for Loss of Water Vol from T-120.Procedures Revised1998-06-29029 June 1998
- on 960226,condensate Storage Tank Outside Design Basis Occurred.Caused by Several Mechanisms for Loss of Water Vol from T-120.Procedures Revised
05000361/LER-1998-009, :on 980428,discovered That Steps in Aoi to Isolate Tank Following Operating Bases Earthquake Had Been Inadvertently Deleted in Aug 1996.Caused by Individual Error.Event Reviewed W/Individual Involved1998-06-29029 June 1998
- on 980428,discovered That Steps in Aoi to Isolate Tank Following Operating Bases Earthquake Had Been Inadvertently Deleted in Aug 1996.Caused by Individual Error.Event Reviewed W/Individual Involved
05000361/LER-1998-010, :on 980526,post-accident Cleanup Units Trains Were Declared Inoperable.Unit Concluded Condition May Be Reportable Under 10CFR50.73(a)(2)(i) for Operation During Past Refueling Outages.Ler Will Be Revised by 9808281998-06-29029 June 1998
- on 980526,post-accident Cleanup Units Trains Were Declared Inoperable.Unit Concluded Condition May Be Reportable Under 10CFR50.73(a)(2)(i) for Operation During Past Refueling Outages.Ler Will Be Revised by 980828
05000361/LER-1986-036, :on 860619,line Voltage Regulators Caused Vital Buses to Be Inoperable.Caused by Procedural Discrepancy. Revised Procedure SO23-II-11.1841998-06-0606 June 1998
- on 860619,line Voltage Regulators Caused Vital Buses to Be Inoperable.Caused by Procedural Discrepancy. Revised Procedure SO23-II-11.184
05000361/LER-1996-012, :on 960229,discovered That CST Was Outside Design Basis.Cause Under Investigation.Compensatory Measures Were Put in Place to Administratively Increase Tanks Water Volume & to Procedularize Operator Actions1998-05-29029 May 1998
- on 960229,discovered That CST Was Outside Design Basis.Cause Under Investigation.Compensatory Measures Were Put in Place to Administratively Increase Tanks Water Volume & to Procedularize Operator Actions
05000361/LER-1998-009, :on 980429,discovered That CST Was Outside Design Basis Due to Procedure Error.Caused by Individual Error.Replaced Steps That Had Been Inadvertently Deleted from Aoi1998-05-29029 May 1998
- on 980429,discovered That CST Was Outside Design Basis Due to Procedure Error.Caused by Individual Error.Replaced Steps That Had Been Inadvertently Deleted from Aoi
05000361/LER-1998-003, :on 980205,inoperable Valve Occurred Due to Grit in Linestarter Mechanism.Sce Has Been Programmatically Replacing Square D Linestarters1998-04-17017 April 1998
- on 980205,inoperable Valve Occurred Due to Grit in Linestarter Mechanism.Sce Has Been Programmatically Replacing Square D Linestarters
05000361/LER-1998-001, :on 980113,loose Collar Was Noted on Turbine Driven AFW Speed Circuit.Caused by Collar Not Properly Being Tightened at Last Documented Reassembly in 1993.Collar & Plug Were Reassembled1998-04-17017 April 1998
- on 980113,loose Collar Was Noted on Turbine Driven AFW Speed Circuit.Caused by Collar Not Properly Being Tightened at Last Documented Reassembly in 1993.Collar & Plug Were Reassembled
05000361/LER-1998-007, :on 980317,discovered Matl in Containment That Could Become Debris in Emergency Sumps.Caused by Ineffective Program Mgt.Removed Identified Matl & Will Issue Memo to Personnel Emphasizing Containment Cleanliness Maint1998-04-16016 April 1998
- on 980317,discovered Matl in Containment That Could Become Debris in Emergency Sumps.Caused by Ineffective Program Mgt.Removed Identified Matl & Will Issue Memo to Personnel Emphasizing Containment Cleanliness Maint
05000206/LER-1998-003-01, :on 980316,unauthorized Protected Entry Area Entry,Was Determined.Caused by Data Entry Error.Appropriate Collection Site Personnel Were Coached.Computer Data Base Modified1998-04-0808 April 1998
- on 980316,unauthorized Protected Entry Area Entry,Was Determined.Caused by Data Entry Error.Appropriate Collection Site Personnel Were Coached.Computer Data Base Modified
05000361/LER-1998-005, :on 980305,inadequate Voltage to 120 Vac Circuits Due to Calculation Error Occurred.Caused by Personnel Error.Sys Mods Made to Affected Sys to Correct Deficiencies1998-04-0606 April 1998
- on 980305,inadequate Voltage to 120 Vac Circuits Due to Calculation Error Occurred.Caused by Personnel Error.Sys Mods Made to Affected Sys to Correct Deficiencies
05000361/LER-1998-008, :on 980306,4160 Vac Supply Cable Exceeded Ampacity Rating.Caused by Error in Feeder Cable Sizing Calculation Completed by Plant Architect/Engineer. Administrative Restrictions Imposed1998-04-0606 April 1998
- on 980306,4160 Vac Supply Cable Exceeded Ampacity Rating.Caused by Error in Feeder Cable Sizing Calculation Completed by Plant Architect/Engineer. Administrative Restrictions Imposed
05000206/LER-1998-002-01, :on 980219,diesel Fuel Filtration Unit Access Was Not Controlled as Vital Area.Caused by Inadequate Training.Security Personnel Will Be Trained on Concept of Vital Matls1998-03-20020 March 1998
- on 980219,diesel Fuel Filtration Unit Access Was Not Controlled as Vital Area.Caused by Inadequate Training.Security Personnel Will Be Trained on Concept of Vital Matls
05000362/LER-1984-045-01, :on 840719,recognized That Four Iodine Transients Met Reporting Criteria of TS 3.4.7,but Had Not Been Reported.Cause Indeterminate.Nrc Approved TS Amend Which Deleted Reporting Requirement of TS 3.4.7.A1998-03-0303 March 1998
- on 840719,recognized That Four Iodine Transients Met Reporting Criteria of TS 3.4.7,but Had Not Been Reported.Cause Indeterminate.Nrc Approved TS Amend Which Deleted Reporting Requirement of TS 3.4.7.A
05000361/LER-1998-002, :on 980126,reactor Coolant Sys Boundary Leakage Occurred.Caused by Cracking of Inconel 600 Nozzle.Four Nozzles (2TW0139B,2TE0122-4,2PDT0978-1 & 2PDT0978-2) Were Repaired1998-02-25025 February 1998
- on 980126,reactor Coolant Sys Boundary Leakage Occurred.Caused by Cracking of Inconel 600 Nozzle.Four Nozzles (2TW0139B,2TE0122-4,2PDT0978-1 & 2PDT0978-2) Were Repaired
05000361/LER-1998-001-01, :on 980113,turbine Driven Auxiliary Feedwater Pump Speed Circuit Collar Loose Were Noted.Caused by vibration-induced Loosening During Periodic Pump Test Runs. Collar & Plug Were Reassembled1998-02-12012 February 1998
- on 980113,turbine Driven Auxiliary Feedwater Pump Speed Circuit Collar Loose Were Noted.Caused by vibration-induced Loosening During Periodic Pump Test Runs. Collar & Plug Were Reassembled
05000362/LER-1997-003-02, :on 971218,determined That Pressurizer Safety Valve Setpoints Were Out of Tolerance.Caused by Setpoint Drift.Valves Will Be Disassembled,Inspected,Reassembled & Reset by Proper Personnel1998-01-19019 January 1998
- on 971218,determined That Pressurizer Safety Valve Setpoints Were Out of Tolerance.Caused by Setpoint Drift.Valves Will Be Disassembled,Inspected,Reassembled & Reset by Proper Personnel
05000362/LER-1997-004-01, :on 971205,typo in TS Was Found.Caused by Personnel Error.Tendon Surveillance Procedure Correctly Referenced Tendon 88-154 & Not 38-1541998-01-0505 January 1998
- on 971205,typo in TS Was Found.Caused by Personnel Error.Tendon Surveillance Procedure Correctly Referenced Tendon 88-154 & Not 38-154
05000361/LER-1997-016, :on 971202,SONGS Personnel Recognized That Fire Damper SARW504165001FD Was Not in Licensee Controlled Specification Surveillance Procedure.Caused by Cognitive Personnel Error.Occurrence Reviewed W/Appropriate Personnel1998-01-0202 January 1998
- on 971202,SONGS Personnel Recognized That Fire Damper SARW504165001FD Was Not in Licensee Controlled Specification Surveillance Procedure.Caused by Cognitive Personnel Error.Occurrence Reviewed W/Appropriate Personnel
05000206/LER-1997-003-01, :on 970520,SCE Discovered Security Computer Sys Was Out of Svc.Caused by Unit 1 Permanently Shutdown,Unit 2 at 100% Full Power & Unit 3 Shutdown.Computer Sys Was Restored1997-12-22022 December 1997
- on 970520,SCE Discovered Security Computer Sys Was Out of Svc.Caused by Unit 1 Permanently Shutdown,Unit 2 at 100% Full Power & Unit 3 Shutdown.Computer Sys Was Restored
05000206/LER-1997-002-02, :on 971027,discovered That Single Copy of Security Contingency Plan Was Missing.Cause Indeterminate. Revised LER Will Be Submitted by 971219 to Provide Results of Investigation1997-11-25025 November 1997
- on 971027,discovered That Single Copy of Security Contingency Plan Was Missing.Cause Indeterminate. Revised LER Will Be Submitted by 971219 to Provide Results of Investigation
05000361/LER-1997-011, :on 970704,instrumentation Channel 1 Declared Inoperable.Caused by Cognitive Personnel Error.Operator Was Coached in Need for Attention to Detail & Util Revised Procedures1997-08-0505 August 1997
- on 970704,instrumentation Channel 1 Declared Inoperable.Caused by Cognitive Personnel Error.Operator Was Coached in Need for Attention to Detail & Util Revised Procedures
05000361/LER-1997-011, :on 970704,wrong B Sample Was Used for Shutdown Margin Surveillance.Caused by Personnel Error.Revised Procedures for Performing SDM Calculations1997-07-30030 July 1997
- on 970704,wrong B Sample Was Used for Shutdown Margin Surveillance.Caused by Personnel Error.Revised Procedures for Performing SDM Calculations
05000362/LER-1997-002-01, :on 970703,RCS Leakage Occurred in Instrument Thermowell Nozzles.Caused by Primary Water Stress Corrosion Cracking of Alloy 600 Type Matls.Replaced Outer Half of Nozzles W/Inconel 690 Matl1997-07-30030 July 1997
- on 970703,RCS Leakage Occurred in Instrument Thermowell Nozzles.Caused by Primary Water Stress Corrosion Cracking of Alloy 600 Type Matls.Replaced Outer Half of Nozzles W/Inconel 690 Matl
05000361/LER-1997-010, :on 970626,check Valve in Charging Subsystem Failed to Open Completely.Caused by Design Defect.Replaced Faulty Design Valves.Rept Includes 10CFR21 Info1997-07-28028 July 1997
- on 970626,check Valve in Charging Subsystem Failed to Open Completely.Caused by Design Defect.Replaced Faulty Design Valves.Rept Includes 10CFR21 Info
05000361/LER-1997-009, :on 970509,class IE 125 Vdc Battery Surveillance Testing Was Completed on 3 Replaced Batteries, Indicating Apparent Drop in Capacity of Two.Caused by No Requirement to Test.Revised TS Bases1997-06-0505 June 1997
- on 970509,class IE 125 Vdc Battery Surveillance Testing Was Completed on 3 Replaced Batteries, Indicating Apparent Drop in Capacity of Two.Caused by No Requirement to Test.Revised TS Bases
05000362/LER-1997-001-02, :on 970412,four Out of Five RCS Nozzles Leaked During Plant Operation & Fifth Suspected of Leaking.Caused by Crack Through Nozzle in Heat Affected Zone of Partial Penetration Weld.Completed Required Welding1997-05-0909 May 1997
- on 970412,four Out of Five RCS Nozzles Leaked During Plant Operation & Fifth Suspected of Leaking.Caused by Crack Through Nozzle in Heat Affected Zone of Partial Penetration Weld.Completed Required Welding
05000361/LER-1997-006, :on 970319,NRC Noted Some Utils Had Not Been Fully Complying W/Requirements of TS Re Surveillance Testing of Electronic Circuits,Per GL 96-01.Specific Cause of Omission Not Known.Procedures Revised1997-04-18018 April 1997
- on 970319,NRC Noted Some Utils Had Not Been Fully Complying W/Requirements of TS Re Surveillance Testing of Electronic Circuits,Per GL 96-01.Specific Cause of Omission Not Known.Procedures Revised
05000361/LER-1997-008, :on 970304,TS Surveillance of Pressurizer Cooldown Rate Was Missed Because Operator Did Not Recognize That real-time Evaluation Plant Data Was Required.Cooldown Transient Terminated1997-04-18018 April 1997
- on 970304,TS Surveillance of Pressurizer Cooldown Rate Was Missed Because Operator Did Not Recognize That real-time Evaluation Plant Data Was Required.Cooldown Transient Terminated
05000361/LER-1997-005, :on 970319,determined That RCS Leakage Was Through Body of Valve Packing Leakoff Plug Caused by Defect. Defective Plug Confirmed to Be Free of Similar Defects, Removed Head & Ground Smooth1997-04-15015 April 1997
- on 970319,determined That RCS Leakage Was Through Body of Valve Packing Leakoff Plug Caused by Defect. Defective Plug Confirmed to Be Free of Similar Defects, Removed Head & Ground Smooth
05000361/LER-1997-004, :on 970303,discovered Steam Leakage from Reactor Coolant Sys Pressurizer Thermowell.Caused by Primary Water Stress Corrosion Cracking of Alloy 600 Type Materials. Removed & Replaced Nozzle W/Inconel 6901997-04-0202 April 1997
- on 970303,discovered Steam Leakage from Reactor Coolant Sys Pressurizer Thermowell.Caused by Primary Water Stress Corrosion Cracking of Alloy 600 Type Materials. Removed & Replaced Nozzle W/Inconel 690
05000361/LER-1997-003, :on 970225,out of Tolerance Condition Identified During Testing of Pressurizer Safety Valve Setpoints.Caused by Setpoints Drift.Setpoints Bounded by Analysis1997-03-18018 March 1997
- on 970225,out of Tolerance Condition Identified During Testing of Pressurizer Safety Valve Setpoints.Caused by Setpoints Drift.Setpoints Bounded by Analysis
05000361/LER-1997-002, :on 970128,increase in Pressurizer Level Occurred Due to Valve Alignment Error.Npeo Was Temporarily Removed from Duties & Counseled by Mgt1997-03-0707 March 1997
- on 970128,increase in Pressurizer Level Occurred Due to Valve Alignment Error.Npeo Was Temporarily Removed from Duties & Counseled by Mgt
05000206/LER-1997-001-01, :on 970107,security Test/Insp Was Missed.Caused by Individual Responsible for Security Sys Tests/Insp Failing to Ensure Tests Completed.Implemented Required Compensatory Actions1997-03-0606 March 1997
- on 970107,security Test/Insp Was Missed.Caused by Individual Responsible for Security Sys Tests/Insp Failing to Ensure Tests Completed.Implemented Required Compensatory Actions