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| 05000346/LER-1983-001, Forwards LER 83-001/03L-0 | Forwards LER 83-001/03L-0 | |
| 05000346/LER-1983-001-03, /03L-0:on 830114,loss of Power to Loop 2 Main Feedwater Block Valve Initiated Feedwater Transient.Caused by Control Rod Insertion from Approx 95% to 75%.Rods Withdrawn | /03L-0:on 830114,loss of Power to Loop 2 Main Feedwater Block Valve Initiated Feedwater Transient.Caused by Control Rod Insertion from Approx 95% to 75%.Rods Withdrawn | |
| 05000346/LER-1983-002, Forwards LER 83-002/03L-0 | Forwards LER 83-002/03L-0 | |
| 05000346/LER-1983-002-03, /03L-0:on 830114 & 15,after Reactor Trips,Rcs Dose Equivalent I-131 Exceeded Tech Spec Limit.Caused by Slight Leakage of Fission Products Through Fuel Cladding.Caused by Temp & Pressure Changes.Situation Monitored | /03L-0:on 830114 & 15,after Reactor Trips,Rcs Dose Equivalent I-131 Exceeded Tech Spec Limit.Caused by Slight Leakage of Fission Products Through Fuel Cladding.Caused by Temp & Pressure Changes.Situation Monitored | |
| 05000346/LER-1983-003, Forwards LER 83-003/03L-0 | Forwards LER 83-003/03L-0 | |
| 05000346/LER-1983-003-03, /03L-0:on 830119,MSIV MS100 Failed to Shut Completely Following Reactor Trip on 830118.Cause Unknown. Valves Disassembled & Inspected W/No Problems Found.Valve Tested & Returned to Svc | /03L-0:on 830119,MSIV MS100 Failed to Shut Completely Following Reactor Trip on 830118.Cause Unknown. Valves Disassembled & Inspected W/No Problems Found.Valve Tested & Returned to Svc | |
| 05000346/LER-1983-004, Forwards LER 83-004/03L-0 | Forwards LER 83-004/03L-0 | |
| 05000346/LER-1983-004-03, /03L-0:on 830119,during Cooldown,Jumper on Pressure Switch PSH-RC2B4 Had Been Left in Place Since 820823.Caused by Lack of Administrative Control & Design Error.Procedure Rewritten to Provide Adequate Switch | /03L-0:on 830119,during Cooldown,Jumper on Pressure Switch PSH-RC2B4 Had Been Left in Place Since 820823.Caused by Lack of Administrative Control & Design Error.Procedure Rewritten to Provide Adequate Switch | |
| 05000346/LER-1983-005-03, /03L-0:on 830127,acceptance Criteria of Containment Airlock Seal Leakage Surveillance Test ST 5061.05 Did Not Agree W/Tech Spec Surveillance Requirements.Caused by Procedure Deficiency | /03L-0:on 830127,acceptance Criteria of Containment Airlock Seal Leakage Surveillance Test ST 5061.05 Did Not Agree W/Tech Spec Surveillance Requirements.Caused by Procedure Deficiency | |
| 05000346/LER-1983-005, Forwards LER 83-005/03L-0 | Forwards LER 83-005/03L-0 | |
| 05000346/LER-1983-006-03, /03L-0:on 830126,door 311,auxiliary Bldg Southeast Stairway at 585-ft Level,Found Open.Caused by Failure of Closure Mechanism Due to Normal Wear.Closure Mechanism Replaced | /03L-0:on 830126,door 311,auxiliary Bldg Southeast Stairway at 585-ft Level,Found Open.Caused by Failure of Closure Mechanism Due to Normal Wear.Closure Mechanism Replaced | |
| 05000346/LER-1983-006, Forwards LER 83-006/03L-0 | Forwards LER 83-006/03L-0 | |
| 05000346/LER-1983-007-03, /03L-0:on 830131,loss of 120-volt Ac Essential Bus Y1 Experienced.Pressurizer Level Indication from LT-RC-14-3 Lost.Loss of Y1 Caused by Failure of YV1 Inverter Input Fuse.Root Cause Unknown | /03L-0:on 830131,loss of 120-volt Ac Essential Bus Y1 Experienced.Pressurizer Level Indication from LT-RC-14-3 Lost.Loss of Y1 Caused by Failure of YV1 Inverter Input Fuse.Root Cause Unknown | |
| 05000346/LER-1983-007, Forwards LER 83-007/03L-0 | Forwards LER 83-007/03L-0 | |
| 05000346/LER-1983-008, Forwards LER 83-008/03L-0 | Forwards LER 83-008/03L-0 | |
| 05000346/LER-1983-008-03, Battery 2P Cell 18 & Battery 1P Cell 33 Specific Gravity Found Below 1.200 & Battery 1N Pilot Cell 33 Voltage Read Below 2.13.Caused by Tech Spec 4.8.2.3.2 Too Stringent for Batteries | Battery 2P Cell 18 & Battery 1P Cell 33 Specific Gravity Found Below 1.200 & Battery 1N Pilot Cell 33 Voltage Read Below 2.13.Caused by Tech Spec 4.8.2.3.2 Too Stringent for Batteries | |
| 05000346/LER-1983-009, Forwards LER 83-009/03L-0 | Forwards LER 83-009/03L-0 | |
| 05000346/LER-1983-010, Forwards LER 83-010/03L-0 | Forwards LER 83-010/03L-0 | |
| 05000346/LER-1983-010-03, /03L-0:on 830207,during Performance of Auxiliary Feedwater Sys Channel Functional Test,Isolation Valve MS106A Failed to Close Electrically.Caused by Dirty & Improperly Lubricated Valve Stem.Valve Stem & Drive Nut Cleaned | /03L-0:on 830207,during Performance of Auxiliary Feedwater Sys Channel Functional Test,Isolation Valve MS106A Failed to Close Electrically.Caused by Dirty & Improperly Lubricated Valve Stem.Valve Stem & Drive Nut Cleaned | |
| 05000346/LER-1983-011-03, /03L-0:on 830211,auxiliary Feedwater Pump Turbine 2 Overspeed Trip Alarm Sounded.Caused by Personnel Error. Personnel Bumped Turbine Overspeed Trip Linkage Causing Trip of Trip Throttle Valve When Removing Case Guards | /03L-0:on 830211,auxiliary Feedwater Pump Turbine 2 Overspeed Trip Alarm Sounded.Caused by Personnel Error. Personnel Bumped Turbine Overspeed Trip Linkage Causing Trip of Trip Throttle Valve When Removing Case Guards | |
| 05000346/LER-1983-011, Forwards LER 83-011/03L-0 | Forwards LER 83-011/03L-0 | |
| 05000346/LER-1983-012, Forwards Revised LER 83-012/01X-2 | Forwards Revised LER 83-012/01X-2 | |
| 05000346/LER-1983-012-01, Operating Practice of Requiring One ECCS Room Cooler to Be Valved Into Svc in Each ECCS Room Less Conservative than Updated FSAR Assumptions. Caused by Lack of Procedural Control.Fsar Reviewed | Operating Practice of Requiring One ECCS Room Cooler to Be Valved Into Svc in Each ECCS Room Less Conservative than Updated FSAR Assumptions. Caused by Lack of Procedural Control.Fsar Reviewed | |
| 05000346/LER-1983-013, Forwards LER 83-013/03L-0 | Forwards LER 83-013/03L-0 | |
| 05000346/LER-1983-013-03, /03L-0:on 830304,chlorine Detector AE5358B Tripped Causing Shutdown of Control Room Normal Ventilation Sys. Caused by Component Failure.Orifice Cleaned & Wick Replaced | /03L-0:on 830304,chlorine Detector AE5358B Tripped Causing Shutdown of Control Room Normal Ventilation Sys. Caused by Component Failure.Orifice Cleaned & Wick Replaced | |
| 05000346/LER-1983-014-03, /03L-0:on 830305,rod 12 of Group 7 Began to Ratchet Trip Into Core.Caused by Blown Fuse in Transfer Switch Module Assembly B Phase.Blown Fuse Replaced.Control Rod 7-12 Successfully Latched & Pulled | /03L-0:on 830305,rod 12 of Group 7 Began to Ratchet Trip Into Core.Caused by Blown Fuse in Transfer Switch Module Assembly B Phase.Blown Fuse Replaced.Control Rod 7-12 Successfully Latched & Pulled | |
| 05000346/LER-1983-014, Forwards LER 83-014/03L-0 | Forwards LER 83-014/03L-0 | |
| 05000346/LER-1983-015, Forwards LER 83-015/03L-0 | Forwards LER 83-015/03L-0 | |
| 05000346/LER-1983-015-03, /03L-0:on 830304,emergency Diesel Generator Output Oscillated Unsteadily.Cause Isolated to Electric Governor Control Sys.Breaker Will Be Repaired Upon Receipt of Assistance from Manufacturer | /03L-0:on 830304,emergency Diesel Generator Output Oscillated Unsteadily.Cause Isolated to Electric Governor Control Sys.Breaker Will Be Repaired Upon Receipt of Assistance from Manufacturer | |
| 05000346/LER-1983-016-03, Amplifier of Startup Level Transmitter LT-SP9A3 for Steam Generator 1-2 Failed. Caused by Component Failure within Amplifier.Amplifier Replaced | Amplifier of Startup Level Transmitter LT-SP9A3 for Steam Generator 1-2 Failed. Caused by Component Failure within Amplifier.Amplifier Replaced | |
| 05000346/LER-1983-016, Forwards LER 83-016/03L-0 | Forwards LER 83-016/03L-0 | |
| 05000346/LER-1983-017-03, /03L-0:on 830411,spent Fuel Pool (SFP) Level Verification Surveillance Test Ordered Later than Tech Spec Requirement.Caused by Personnel Error.Sfp Level Verified. Memo on Schedules Planned | /03L-0:on 830411,spent Fuel Pool (SFP) Level Verification Surveillance Test Ordered Later than Tech Spec Requirement.Caused by Personnel Error.Sfp Level Verified. Memo on Schedules Planned | |
| 05000346/LER-1983-020, Forwards Resubmittal of LER 83-020,Rev 1,correcting Inadvertent Listing of Page 1 Sequential Number as 83-027 | Forwards Resubmittal of LER 83-020,Rev 1,correcting Inadvertent Listing of Page 1 Sequential Number as 83-027 | |
| 05000346/LER-1983-020-03, /03X-1:on 830428,pressurizer Sample Isolation Valve Failed to Close.Caused by Personnel Error & Inadequate Maint Procedures.Torque Switch Reset,Valve Stem Cleaned & Lubricated & Maint Order 1-83-3114-00 Rewritten | /03X-1:on 830428,pressurizer Sample Isolation Valve Failed to Close.Caused by Personnel Error & Inadequate Maint Procedures.Torque Switch Reset,Valve Stem Cleaned & Lubricated & Maint Order 1-83-3114-00 Rewritten | |
| 05000346/LER-1983-021-03, /03L-0:on 830502,operator Found Fuel Handling Access Corridor Door 406 Ajar.Caused by Failure of Closure Mechanism.Closure Mechanism Adjusted to Force Door Closed | /03L-0:on 830502,operator Found Fuel Handling Access Corridor Door 406 Ajar.Caused by Failure of Closure Mechanism.Closure Mechanism Adjusted to Force Door Closed | |
| 05000346/LER-1983-022-03, /03L-0:on 830513,determined Erratic Generator Output in Response to Speed Change Input on 830413 Reportable.Caused by Loose Connection on Electronic Governor Control Box.Terminal Screw Cross Threaded | /03L-0:on 830513,determined Erratic Generator Output in Response to Speed Change Input on 830413 Reportable.Caused by Loose Connection on Electronic Governor Control Box.Terminal Screw Cross Threaded | |
| 05000346/LER-1983-023-03, /03L-0:on 830510,120-volt Ac Essential Bus Y4 Lost,Resulting in Deenergizing Reactor Protection & Safety Features Actuation Sys Channel 4.Caused by Blown Fuse in Inverter YV4.Power Restored to Bus | /03L-0:on 830510,120-volt Ac Essential Bus Y4 Lost,Resulting in Deenergizing Reactor Protection & Safety Features Actuation Sys Channel 4.Caused by Blown Fuse in Inverter YV4.Power Restored to Bus | |
| 05000346/LER-1983-024-03, /03L-0:on 830511,while Starting Up from 830510 Reactor Trip,Quadrant Power Tilt in Quadrant Yz Exceeded Tech Spec steady-state Limit.Caused by Inherent Design of B&W NSSS & Negative Moderator Temp Coefficient | /03L-0:on 830511,while Starting Up from 830510 Reactor Trip,Quadrant Power Tilt in Quadrant Yz Exceeded Tech Spec steady-state Limit.Caused by Inherent Design of B&W NSSS & Negative Moderator Temp Coefficient | |
| 05000346/LER-1983-026-03, /03L-0:on 830524,one Half Channel Trip in Steam & Feedwater Rupture Control Sys (Sfrcs) Channel 2 Received. Caused by Component Failure.Input Buffer Replaced | /03L-0:on 830524,one Half Channel Trip in Steam & Feedwater Rupture Control Sys (Sfrcs) Channel 2 Received. Caused by Component Failure.Input Buffer Replaced | |
| 05000346/LER-1983-027-03, /03X-1:on 830428,valve RC240B Declared Inoperable. Caused by Inadequate Maint Procedures & Lack of Proper Training.Torque Switch Set to E-15 Settings & Valve Stem Cleaned & RC240B Returned to Svc | /03X-1:on 830428,valve RC240B Declared Inoperable. Caused by Inadequate Maint Procedures & Lack of Proper Training.Torque Switch Set to E-15 Settings & Valve Stem Cleaned & RC240B Returned to Svc | |
| 05000346/LER-1983-028-03, /03L-0:on 830603 & 17,fuel Handling Area Radiation Monitors RE8446 & 7 Found Deenergized.Caused by Blown Radiation Monitoring Cabinet Fuse.Fuse Replaced | /03L-0:on 830603 & 17,fuel Handling Area Radiation Monitors RE8446 & 7 Found Deenergized.Caused by Blown Radiation Monitoring Cabinet Fuse.Fuse Replaced | |
| 05000346/LER-1983-029-03, /03L-0:on 830612,main Steam Safety Valve on Steam Generator 1-1 Header Actuated.Cause Unknown.All Main Steam Safety Valves Will Be Tested | /03L-0:on 830612,main Steam Safety Valve on Steam Generator 1-1 Header Actuated.Cause Unknown.All Main Steam Safety Valves Will Be Tested | |
| 05000346/LER-1983-030-03, /03L-0:on 830614,during Change in ECCS Coil Assembly 1,floor Plugs Forming Part of Negative Pressure Boundary & Fire Barriers Removed.Caused by Personnel Error. Floor Plugs Reinstalled & New Procedure Written | /03L-0:on 830614,during Change in ECCS Coil Assembly 1,floor Plugs Forming Part of Negative Pressure Boundary & Fire Barriers Removed.Caused by Personnel Error. Floor Plugs Reinstalled & New Procedure Written | |
| 05000346/LER-1983-031-01, /01T-0:on 830708,chlorine Detectors AE4863A & B Determined Inadequately Protected Against All Types of Missiles.Caused by Bechtel Design Error.Tornado Procedure AD 1827.06 Modified | /01T-0:on 830708,chlorine Detectors AE4863A & B Determined Inadequately Protected Against All Types of Missiles.Caused by Bechtel Design Error.Tornado Procedure AD 1827.06 Modified | |
| 05000346/LER-1983-033-03, Fire Detection Zone Reactor Coolant Pump 1-2,containment Level 603 Went Into Alarm & Could Not Be Reset.Caused by Failed Smoke Detector.Detector Replaced | Fire Detection Zone Reactor Coolant Pump 1-2,containment Level 603 Went Into Alarm & Could Not Be Reset.Caused by Failed Smoke Detector.Detector Replaced | |
| 05000346/LER-1983-036-03, /03L-0:on 830715,safety Features Actuation Signal Channel 4 Containment Radiation Monitor RE2007 Failed Low. Monitor Also Inoperable on 830721 Due to Spiking.Exact Cause Unknown | /03L-0:on 830715,safety Features Actuation Signal Channel 4 Containment Radiation Monitor RE2007 Failed Low. Monitor Also Inoperable on 830721 Due to Spiking.Exact Cause Unknown | |
| 05000346/LER-1983-036, Revised LER 83-036/03X-1:on 830715 & 21,safety Features Actuation Sys Channel 4 Containment Radiation Monitor RE2007 Failed Low.Caused by Detector failure.RE2007 Replaced | Revised LER 83-036/03X-1:on 830715 & 21,safety Features Actuation Sys Channel 4 Containment Radiation Monitor RE2007 Failed Low.Caused by Detector failure.RE2007 Replaced | |
| 05000346/LER-1983-038-03, /03L-1:on 830725,half Trip of Steam & Feedwater Line Rupture Control Sys Actuation Channel 1 & Spurious Trip of Logic Channel 1 Occurred.Caused by Failed Power Supply & Relay Driver Board,Respectively.Parts Replaced | /03L-1:on 830725,half Trip of Steam & Feedwater Line Rupture Control Sys Actuation Channel 1 & Spurious Trip of Logic Channel 1 Occurred.Caused by Failed Power Supply & Relay Driver Board,Respectively.Parts Replaced | |
| 05000346/LER-1983-039-03, /03X-1:on 830726,discovered That W/Hand Wheel for Containment Personnel Hatch Inner Door in Shut Position, Door Partially Open.Caused by Design Error.Personnel Lock Repaired & Returned to Operable Status | /03X-1:on 830726,discovered That W/Hand Wheel for Containment Personnel Hatch Inner Door in Shut Position, Door Partially Open.Caused by Design Error.Personnel Lock Repaired & Returned to Operable Status | |
| 05000346/LER-1983-040-03, Auxiliary Feed Pump 1-1 Failed to Respond to Speed Change Signals from Automatic & Manual Control.Caused by Design Deficiency in Clutch Mechanism.New Design Slip Clutch Installed | Auxiliary Feed Pump 1-1 Failed to Respond to Speed Change Signals from Automatic & Manual Control.Caused by Design Deficiency in Clutch Mechanism.New Design Slip Clutch Installed | |