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| 05000335/LER-1983-001-03, /03L-0:on 830104,channel Mc Containment Radiation Isolation Bistable Found to Trip at 10.117 R/H Vice 10 R/H Tech Spec Limit.Cause of Consolidated Control Model 6N88-1 Bistable Drift Undetermined.Setpoint Adjusted | /03L-0:on 830104,channel Mc Containment Radiation Isolation Bistable Found to Trip at 10.117 R/H Vice 10 R/H Tech Spec Limit.Cause of Consolidated Control Model 6N88-1 Bistable Drift Undetermined.Setpoint Adjusted | |
| 05000335/LER-1983-001, Forwards LER 83-001/03L-0 | Forwards LER 83-001/03L-0 | |
| 05000389/LER-1983-001, Forwards LER 83-001/01T-0 | Forwards LER 83-001/01T-0 | |
| 05000389/LER-1983-001-01, /01T-0:on 830416,during Fuel Movement,Both Emergency Generators Discovered out-of-svc.Caused by Personnel Error in Establishing Out of Svc Log.Logs Reviewed & Periodic Surveillance Procedure Revised | /01T-0:on 830416,during Fuel Movement,Both Emergency Generators Discovered out-of-svc.Caused by Personnel Error in Establishing Out of Svc Log.Logs Reviewed & Periodic Surveillance Procedure Revised | |
| 05000335/LER-1983-002-03, /03L-0:on 830106,pressurizer Surge Line Sample Containment Isolation Valve Failed to Close Upon Signal from Remote Switch.Caused by Mechanical Freeze Due to Corrosion Buildup Between Bonnet & Stem.Valve Repaired | /03L-0:on 830106,pressurizer Surge Line Sample Containment Isolation Valve Failed to Close Upon Signal from Remote Switch.Caused by Mechanical Freeze Due to Corrosion Buildup Between Bonnet & Stem.Valve Repaired | |
| 05000335/LER-1983-002, Forwards LER 83-002/03L-0 | Forwards LER 83-002/03L-0 | |
| 05000389/LER-1983-002-03, /03L-0:on 830421,while in Mode 6,refueling Bus Tie Breaker 2A2 & 2A3 Opened,Deenergizing Bus 2A3 & Causing Loss of Low Pressure Safety Injection Pump A.Caused by Shorted Contact Due to Personnel Error.Bus 2A3 Restored | /03L-0:on 830421,while in Mode 6,refueling Bus Tie Breaker 2A2 & 2A3 Opened,Deenergizing Bus 2A3 & Causing Loss of Low Pressure Safety Injection Pump A.Caused by Shorted Contact Due to Personnel Error.Bus 2A3 Restored | |
| 05000389/LER-1983-003-03, /03L-0:on 830412,following Initial Core Load,Low Pressure Safety Injection Pump a Tripped Off.Condition Resulted in Loss of Operation of Shutdown Cooling Loop A. Caused by Personnel Error.Technician Reinstructed | /03L-0:on 830412,following Initial Core Load,Low Pressure Safety Injection Pump a Tripped Off.Condition Resulted in Loss of Operation of Shutdown Cooling Loop A. Caused by Personnel Error.Technician Reinstructed | |
| 05000389/LER-1983-003, Forwards LER 83-003/03L-0 | Forwards LER 83-003/03L-0 | |
| 05000335/LER-1983-003, Forwards LER 83-003/03L-0 | Forwards LER 83-003/03L-0 | |
| 05000335/LER-1983-003-03, /03L-0:on 830108,dose Equivalent Iodine Exceeded Tech Spec Limit of 1.0 Uci/G.Caused by Iodine Spiking Phenomenon in Primary Coolant Due to Transient Resulting from Power Reduction Below Point of Adding Heat | /03L-0:on 830108,dose Equivalent Iodine Exceeded Tech Spec Limit of 1.0 Uci/G.Caused by Iodine Spiking Phenomenon in Primary Coolant Due to Transient Resulting from Power Reduction Below Point of Adding Heat | |
| 05000335/LER-1983-004, Forwards LER 83-004/03L-0 | Forwards LER 83-004/03L-0 | |
| 05000335/LER-1983-004-03, /03L-0:on 830114,auxiliary Feedwater Pump C Trip & Throttle Valve Not Manually Reset.Caused by Operator Oversight.Operator Counseled on Correct Trip Operation | /03L-0:on 830114,auxiliary Feedwater Pump C Trip & Throttle Valve Not Manually Reset.Caused by Operator Oversight.Operator Counseled on Correct Trip Operation | |
| 05000389/LER-1983-004-03, /03L-0:on 830424,during Initial Fill & vent,wide- Range Pressure Indicator Discovered Reading Zero Psig.Caused by Erroneously Isolated Pressure Transmitter,Rendering PORV Inoperable.Valve Lineup Performed Successfully | /03L-0:on 830424,during Initial Fill & vent,wide- Range Pressure Indicator Discovered Reading Zero Psig.Caused by Erroneously Isolated Pressure Transmitter,Rendering PORV Inoperable.Valve Lineup Performed Successfully | |
| 05000335/LER-1983-005-03, /03L-0:on 830110,auxiliary Feedwater Pump Discharge (MV-09-11) Failed to Operate During Surveillance. Caused by Dirty Gould Contacts.Contacts Cleaned | /03L-0:on 830110,auxiliary Feedwater Pump Discharge (MV-09-11) Failed to Operate During Surveillance. Caused by Dirty Gould Contacts.Contacts Cleaned | |
| 05000335/LER-1983-005, Forwards LER 83-005/03L-0 | Forwards LER 83-005/03L-0 | |
| 05000389/LER-1983-005-01, /01T-0:on 830507,while Reviewing Plant Status Following Mode Change to Hot Shutdown,Discovered Safety Injection Tanks Had Remained Isolated.Caused by Personnel Error.Operators Counseled on Procedures | /01T-0:on 830507,while Reviewing Plant Status Following Mode Change to Hot Shutdown,Discovered Safety Injection Tanks Had Remained Isolated.Caused by Personnel Error.Operators Counseled on Procedures | |
| 05000389/LER-1983-006, Submits Supplemental Info to LER 83-06 Re Safety Injection Sys Vent/Drain Vibration Restraints.Field Insp Program,Field Vent/Drain Insp & Plant Change/Mod Procedure Initiated.Info to Be Included in Revised LER | Submits Supplemental Info to LER 83-06 Re Safety Injection Sys Vent/Drain Vibration Restraints.Field Insp Program,Field Vent/Drain Insp & Plant Change/Mod Procedure Initiated.Info to Be Included in Revised LER | |
| 05000389/LER-1983-006-01, /01T-0:on 830511,leak of Approx 1 Quart Per Minute Developed in Weld on 1-inch Drain Line for Safety Injection Header 2B1.Cause Unknown.Cracked Weld & Associated Piping Replaced.Weld Undergoing Exam | /01T-0:on 830511,leak of Approx 1 Quart Per Minute Developed in Weld on 1-inch Drain Line for Safety Injection Header 2B1.Cause Unknown.Cracked Weld & Associated Piping Replaced.Weld Undergoing Exam | |
| 05000335/LER-1983-006, Forwards LER 83-006/03L-0 | Forwards LER 83-006/03L-0 | |
| 05000335/LER-1983-006-03, /03L-0:on 830121,during Periodic Control Element Assembly (CEA) Exercise,Cea 43 Slipped.Cause Not Determined. CEA 45 Has Operated Normally Since Event | /03L-0:on 830121,during Periodic Control Element Assembly (CEA) Exercise,Cea 43 Slipped.Cause Not Determined. CEA 45 Has Operated Normally Since Event | |
| 05000389/LER-1983-007-03, /03L-0:on 830428,during Cold Shutdown,Porv 1474 Failed to Open at Required Pressure.Cause Not Determined.Sys Pressure Reduced & PORV Tested Satisfactorily | /03L-0:on 830428,during Cold Shutdown,Porv 1474 Failed to Open at Required Pressure.Cause Not Determined.Sys Pressure Reduced & PORV Tested Satisfactorily | |
| 05000335/LER-1983-007, Forwards LER 83-007/03L-0 | Forwards LER 83-007/03L-0 | |
| 05000335/LER-1983-007-03, /03L-0:on 830203,control Element Assembly 66 Dropped 56 Inches to Core.No Cause Found.Element Returned to Group Position & Normal Operation Resumed | /03L-0:on 830203,control Element Assembly 66 Dropped 56 Inches to Core.No Cause Found.Element Returned to Group Position & Normal Operation Resumed | |
| 05000335/LER-1983-008, Forwards LER 83-008/03L-0 | Forwards LER 83-008/03L-0 | |
| 05000335/LER-1983-008-03, /03L-0:on 830128,while Testing Operability of Containment Fan Coolers Using Staggered Test basis,HVS-1D Failed to Start.Caused by Dirty Breaker Contacts at Load Ctr Breaker.Breaker Overhauled & Thoroughly Cleaned | /03L-0:on 830128,while Testing Operability of Containment Fan Coolers Using Staggered Test basis,HVS-1D Failed to Start.Caused by Dirty Breaker Contacts at Load Ctr Breaker.Breaker Overhauled & Thoroughly Cleaned | |
| 05000389/LER-1983-008-03, /03L-0:on 830514,while in Mode 3,operator Observed All Position Indication Lights on PORV 1475 Were Out.Caused by Loss of Magnetic Property to Magnet on Valve Shaft Due to High Temps in Environs.Magnet Replaced | /03L-0:on 830514,while in Mode 3,operator Observed All Position Indication Lights on PORV 1475 Were Out.Caused by Loss of Magnetic Property to Magnet on Valve Shaft Due to High Temps in Environs.Magnet Replaced | |
| 05000335/LER-1983-009, Forwards LER 83-009/03L-0 | Forwards LER 83-009/03L-0 | |
| 05000335/LER-1983-009-03, /03L-0:on 830207,train Heaters for Shield Bldg Ventilation Sys Tripped Off Due to High Temp.Caused by Defective Fenwal Model 543 Temp Controller.Controller Replaced | /03L-0:on 830207,train Heaters for Shield Bldg Ventilation Sys Tripped Off Due to High Temp.Caused by Defective Fenwal Model 543 Temp Controller.Controller Replaced | |
| 05000389/LER-1983-009-03, /03L-0:on 830514,while in Mode 3,hot Standby, Personnel Airlock Was in Use & Outer Equalizing Valve Did Not Shut.Airlock Declared Inoperable.Caused by Broken Equalizing Valve.Broken Piece Repaired | /03L-0:on 830514,while in Mode 3,hot Standby, Personnel Airlock Was in Use & Outer Equalizing Valve Did Not Shut.Airlock Declared Inoperable.Caused by Broken Equalizing Valve.Broken Piece Repaired | |
| 05000335/LER-1983-010, Forwards LER 83-010/03L-0 | Forwards LER 83-010/03L-0 | |
| 05000335/LER-1983-010-03, /03L-0:on 830217,reactor Protection Sys Logic Matrix Relay AB-1 Found Failed During Periodic Testing. Caused by Open CP Clair Model HGZX-1011 Mercury Wetted Relay.Relay Replaced in Kind | /03L-0:on 830217,reactor Protection Sys Logic Matrix Relay AB-1 Found Failed During Periodic Testing. Caused by Open CP Clair Model HGZX-1011 Mercury Wetted Relay.Relay Replaced in Kind | |
| 05000389/LER-1983-010-03, /03L-0:on 830511,power Lost to Side B Vital & Nonvital Buses.Caused by Opening Incorrect Breaker at Distribution Switchyard.Personnel Instructed on Importance of Proper Switching | /03L-0:on 830511,power Lost to Side B Vital & Nonvital Buses.Caused by Opening Incorrect Breaker at Distribution Switchyard.Personnel Instructed on Importance of Proper Switching | |
| 05000335/LER-1983-011, Forwards LER 83-011/03L-0 | Forwards LER 83-011/03L-0 | |
| 05000335/LER-1983-011-03, /03L-0:on 830228,periodic Integrated ESF Test Revealed Eight Diesel Generator Loading Timers Out of Tolerance.Caused by Setpoint Drift.Troubleshooting in Progress to Identify Problems & Correct Deficiencies | /03L-0:on 830228,periodic Integrated ESF Test Revealed Eight Diesel Generator Loading Timers Out of Tolerance.Caused by Setpoint Drift.Troubleshooting in Progress to Identify Problems & Correct Deficiencies | |
| 05000389/LER-1983-011-03, /03L-0:on 830510,during Precritical Testing, Initial Performance of Tech Spec Surveillance Found Three Valve Motor Operators Missing Thermal Overload Bypass Switches.Caused by Design Error.Design Changed | /03L-0:on 830510,during Precritical Testing, Initial Performance of Tech Spec Surveillance Found Three Valve Motor Operators Missing Thermal Overload Bypass Switches.Caused by Design Error.Design Changed | |
| 05000389/LER-1983-012-03, /03L-0:on 830523,during Preoperational Testing, PORV Position Indicator Lights Discovered to Be Out.Caused by Failed Magnetic Slug on Valve Stem.New Magnet W/Annealed Metal Used as Replacement | /03L-0:on 830523,during Preoperational Testing, PORV Position Indicator Lights Discovered to Be Out.Caused by Failed Magnetic Slug on Valve Stem.New Magnet W/Annealed Metal Used as Replacement | |
| 05000335/LER-1983-012-03, /03L-0:on 830301,during Cold Shutdown & Prior to Refueling,Steam Generator a Drained for Work & LPSI Pump B Placed Out of Svc.Caused by Operator Unfamiliarity W/Tech Spec Requirements for Minimal Required Equipment | /03L-0:on 830301,during Cold Shutdown & Prior to Refueling,Steam Generator a Drained for Work & LPSI Pump B Placed Out of Svc.Caused by Operator Unfamiliarity W/Tech Spec Requirements for Minimal Required Equipment | |
| 05000335/LER-1983-012, Forwards LER 83-012/03L-0 | Forwards LER 83-012/03L-0 | |
| 05000389/LER-1983-013-03, /03L-0:on 830520,while Leak Testing Escape Airlock,Excessive Leak Rate Detected.Caused by Linkages for Inner & Outer Door Equalizing Valves Being Slightly Out of Adjustment.Linkages Readjusted | /03L-0:on 830520,while Leak Testing Escape Airlock,Excessive Leak Rate Detected.Caused by Linkages for Inner & Outer Door Equalizing Valves Being Slightly Out of Adjustment.Linkages Readjusted | |
| 05000335/LER-1983-013-03, /03L-0:on 830302,during Refueling Outage,Charging Sys Common Header Isolation Valve V2429 Tagged Closed to Facilitate Work on Seal Water Injection Sys to Reactor Coolant Pumps Resulting in Loss of Boration Flow Path | /03L-0:on 830302,during Refueling Outage,Charging Sys Common Header Isolation Valve V2429 Tagged Closed to Facilitate Work on Seal Water Injection Sys to Reactor Coolant Pumps Resulting in Loss of Boration Flow Path | |
| 05000335/LER-1983-013, Forwards LER 83-013/03L-0 | Forwards LER 83-013/03L-0 | |
| 05000335/LER-1983-014, Forwards LER 83-014/03L-0 | Forwards LER 83-014/03L-0 | |
| 05000389/LER-1983-014-03, /03L-0:on 830522,main Feed Water Isolation Valve B Drifted Open Twice.Caused by Thermal Relief Orifice Installed in Hydraulic Line to Top of Actuator.Thermal Relief Orifice in Hydraulic Sys Plugged | /03L-0:on 830522,main Feed Water Isolation Valve B Drifted Open Twice.Caused by Thermal Relief Orifice Installed in Hydraulic Line to Top of Actuator.Thermal Relief Orifice in Hydraulic Sys Plugged | |
| 05000335/LER-1983-014-03, /03L-0:on 830224,25,26 & 27,during Preparation for 1983 Refueling Outage,Dose Equivalent I-131 Exceeded Tech Spec Limit.Iodine Spiking Expected on Power Reductions Based on Past Operating History | /03L-0:on 830224,25,26 & 27,during Preparation for 1983 Refueling Outage,Dose Equivalent I-131 Exceeded Tech Spec Limit.Iodine Spiking Expected on Power Reductions Based on Past Operating History | |
| 05000389/LER-1983-015-03, /03L-0:on 830527,during Preoperational Testing, Both 4,160-volt safety-related Buses 2A3 & 2B3 Deenergized. Caused by Tie Breakers Being Tripped as Operator Opened Cubicle Door & Switch Gears Cleaned | /03L-0:on 830527,during Preoperational Testing, Both 4,160-volt safety-related Buses 2A3 & 2B3 Deenergized. Caused by Tie Breakers Being Tripped as Operator Opened Cubicle Door & Switch Gears Cleaned | |
| 05000335/LER-1983-015, Forwards LER 83-015/03L-0 | Forwards LER 83-015/03L-0 | |
| 05000335/LER-1983-015-03, /03L-0:on 830312,reactor Protection Sys Matrix Relay AB-3 Failed.Util Coordinating Corrective Action for Relays w/C-E & CP Clair Co | /03L-0:on 830312,reactor Protection Sys Matrix Relay AB-3 Failed.Util Coordinating Corrective Action for Relays w/C-E & CP Clair Co | |
| 05000389/LER-1983-016-03, /03L-0:on 830527,during Preoperational Testing,Two of Three Charging Pumps Inoperable for Approx 15 H.Caused by Sealwater Sys Gasket Leak & Charging Pump Relief Valve Failure.Pumps Repaired & Retested | /03L-0:on 830527,during Preoperational Testing,Two of Three Charging Pumps Inoperable for Approx 15 H.Caused by Sealwater Sys Gasket Leak & Charging Pump Relief Valve Failure.Pumps Repaired & Retested | |
| 05000335/LER-1983-016, Forwards LER 83-016/03L-0 | Forwards LER 83-016/03L-0 | |
