| | | Reporting criterion |
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| 05000251/LER-1981-001-03, /03L-0:on 810112,during Startup,For 4-h,condensate Storage Tank Contained Less than 185,000 Gallons Required by Tech Spec 3.8.1.C.Caused by Increased Water Demand During Low Power Physics Testing Exceeding Treatment Plant Ou | /03L-0:on 810112,during Startup,For 4-h,condensate Storage Tank Contained Less than 185,000 Gallons Required by Tech Spec 3.8.1.C.Caused by Increased Water Demand During Low Power Physics Testing Exceeding Treatment Plant Output | |
| 05000251/LER-1981-001, Forwards LER 81-001/03L-0 | Forwards LER 81-001/03L-0 | |
| 05000250/LER-1981-001, Forwards LER 81-001/03L-0 | Forwards LER 81-001/03L-0 | |
| 05000250/LER-1981-001-03, /03L-0:on 810101,while Performing Surveillance on Emergency Diesel Generator B,Loss of Voltage Control Occurred.Caused by Fuse Failure.Fuses Were Replaced.Annual Surveillance Will Include Fuse Checks | /03L-0:on 810101,while Performing Surveillance on Emergency Diesel Generator B,Loss of Voltage Control Occurred.Caused by Fuse Failure.Fuses Were Replaced.Annual Surveillance Will Include Fuse Checks | |
| 05000250/LER-1981-002, Forwards LER 81-002/01T-0 | Forwards LER 81-002/01T-0 | |
| 05000250/LER-1981-002-01, /01T-0:on 810103,during Planned Shutdown,Boric Acid Flowpath from Boric Acid Tanks Found Obstructed.Caused by Reduced Temp Resulting from Failure of One Channel of Heat Tracing Circuit 21.Temp Setpoint Increased | /01T-0:on 810103,during Planned Shutdown,Boric Acid Flowpath from Boric Acid Tanks Found Obstructed.Caused by Reduced Temp Resulting from Failure of One Channel of Heat Tracing Circuit 21.Temp Setpoint Increased | |
| 05000251/LER-1981-002-03, /03L-0:on 810214,boric Acid Flow in Normal Flowpath from Boric Acid Tanks Could Not Be Established & Low Temp Reading Found in Flowpath on 810217.Caused by Three Splices Needing Repair on Heat Tracing Circuits | /03L-0:on 810214,boric Acid Flow in Normal Flowpath from Boric Acid Tanks Could Not Be Established & Low Temp Reading Found in Flowpath on 810217.Caused by Three Splices Needing Repair on Heat Tracing Circuits | |
| 05000251/LER-1981-002, Forwards LER 81-002/03L-0 | Forwards LER 81-002/03L-0 | |
| 05000250/LER-1981-003-01, /01T-0:on 810105,new Coil Assembly in Spare Parts Storage Found to Have Crack in Spool End Plate.Cause Not Stated.One Coil in Svc Found Cracked.Coil Replaced.All New Coils &/Or Relays Will Be Inspected Upon Receipt | /01T-0:on 810105,new Coil Assembly in Spare Parts Storage Found to Have Crack in Spool End Plate.Cause Not Stated.One Coil in Svc Found Cracked.Coil Replaced.All New Coils &/Or Relays Will Be Inspected Upon Receipt | |
| 05000251/LER-1981-003-03, /03L-0:on 810218,leak Discovered in Rcs.Caused by Cracked Weld Between Vent Valve Line & 4A Reactor Coolant Pump Seal Supply Line.Vent Line Cut & Rewelded to Seal Line. Mod Will Be Implemented | /03L-0:on 810218,leak Discovered in Rcs.Caused by Cracked Weld Between Vent Valve Line & 4A Reactor Coolant Pump Seal Supply Line.Vent Line Cut & Rewelded to Seal Line. Mod Will Be Implemented | |
| 05000250/LER-1981-003, Forwards LER 81-003/01T-0 | Forwards LER 81-003/01T-0 | |
| 05000251/LER-1981-003, Forwards LER 81-003/03L-0 | Forwards LER 81-003/03L-0 | |
| 05000250/LER-1981-004, Forwards Updated LER 81-004/03X-1 | Forwards Updated LER 81-004/03X-1 | |
| 05000251/LER-1981-004, Forwards LER 81-004/03L-0 | Forwards LER 81-004/03L-0 | |
| 05000250/LER-1981-004-03, During Power Operation Auxiliary Feedwater Pump a Failed to Meet Acceptance Criteria Per Tech Spec 4.10.1.Caused by Damaged Valve Plug. Cause of Damage Not Determined.Stem & Plug Replaced | During Power Operation Auxiliary Feedwater Pump a Failed to Meet Acceptance Criteria Per Tech Spec 4.10.1.Caused by Damaged Valve Plug. Cause of Damage Not Determined.Stem & Plug Replaced | |
| 05000251/LER-1981-004-03, /03L-0:on 810322,reactor Trip Resulted from Steam Flow/Feedwater Flow Mismatch Coincident W/Steam Generator a Low Level.Caused by Failed Solenoid Coil on Feedwater Regulator Valve.Evaluation Continuing | /03L-0:on 810322,reactor Trip Resulted from Steam Flow/Feedwater Flow Mismatch Coincident W/Steam Generator a Low Level.Caused by Failed Solenoid Coil on Feedwater Regulator Valve.Evaluation Continuing | |
| 05000250/LER-1981-005, Forwards LER 81-005/01T-0 | Forwards LER 81-005/01T-0 | |
| 05000251/LER-1981-005-03, /03L-0:on 810407,need for Governor Adjustment Found During Auxiliary Feedwater Pump a Test & Pump C Taken Out of Svc for IE Bulletin 79-14 Mods.Cause Not Stated. Governors Repaired | /03L-0:on 810407,need for Governor Adjustment Found During Auxiliary Feedwater Pump a Test & Pump C Taken Out of Svc for IE Bulletin 79-14 Mods.Cause Not Stated. Governors Repaired | |
| 05000251/LER-1981-005, Forwards LER 81-005/03L-0 | Forwards LER 81-005/03L-0 | |
| 05000250/LER-1981-005-01, /01T-0:on 810310,drain Header to Floor of Component Cooling Water Pump & Heat Exchanger Room Backed Up.Caused by Overflow of Laundry Water from Monitor Tank. Laundry Water Transfer Terminated | /01T-0:on 810310,drain Header to Floor of Component Cooling Water Pump & Heat Exchanger Room Backed Up.Caused by Overflow of Laundry Water from Monitor Tank. Laundry Water Transfer Terminated | |
| 05000251/LER-1981-006-03, /03L-0:on 810423,snubber on Supply Steam Line to Auxiliary Feedwater Sys Observed to Have Broken Loose. Caused by Failure of Threaded Joint for Connection of Snubber Rod from Turnbuckle to Adaptor Plate.Joint Welded | /03L-0:on 810423,snubber on Supply Steam Line to Auxiliary Feedwater Sys Observed to Have Broken Loose. Caused by Failure of Threaded Joint for Connection of Snubber Rod from Turnbuckle to Adaptor Plate.Joint Welded | |
| 05000251/LER-1981-006, Forwards LER 81-006/03L-0 | Forwards LER 81-006/03L-0 | |
| 05000250/LER-1981-006, Forwards LER 81-006/03L-0 | Forwards LER 81-006/03L-0 | |
| 05000250/LER-1981-006-03, /03L-0:on 810324,rept Not Submitted Per Tech Spec 6.9.2.b.2 When Action Mode of Tech Spec 3.1.5.d Was Entered. Caused by Misinterpretation of Reporting Requirements.Plant in Process of Obtaining Interpretations of Requiremen | /03L-0:on 810324,rept Not Submitted Per Tech Spec 6.9.2.b.2 When Action Mode of Tech Spec 3.1.5.d Was Entered. Caused by Misinterpretation of Reporting Requirements.Plant in Process of Obtaining Interpretations of Requirements | |
| 05000250/LER-1981-007-03, /03L-0:on 810401,during Planned Maint,Disc Stud Nut Discovered Missing from 3A Main Feedwater Check Valve & Pivot Pins Missing from 3A Feedwater Bypass Check Valve. Improved Locking Device Will Be Installed During Outage | /03L-0:on 810401,during Planned Maint,Disc Stud Nut Discovered Missing from 3A Main Feedwater Check Valve & Pivot Pins Missing from 3A Feedwater Bypass Check Valve. Improved Locking Device Will Be Installed During Outage | |
| 05000251/LER-1981-007, Forwards LER 81-007/03L-0 | Forwards LER 81-007/03L-0 | |
| 05000251/LER-1981-007-03, /03L-0:on 810426,component Cooling Water Surge Tank Low Level Alarm Sounded & Containment Sump Level Found Increasing.Caused by Failed Flexitallic Gasket on Inlet Flange of Excess Letdown Heat Exchanger | /03L-0:on 810426,component Cooling Water Surge Tank Low Level Alarm Sounded & Containment Sump Level Found Increasing.Caused by Failed Flexitallic Gasket on Inlet Flange of Excess Letdown Heat Exchanger | |
| 05000250/LER-1981-007, Forwards LER 81-007/03L-0 | Forwards LER 81-007/03L-0 | |
| 05000251/LER-1981-008-03, /03L-0:on 810717,while Performing Instrumentation Repairs on Pressurizer Spray Valve PCV-4-455B,RCS Leakage Discovered in Unused & Capped Packing Leakoff Line.Caused by Failure of Stem Seal Bellows & Crack in Nipple | /03L-0:on 810717,while Performing Instrumentation Repairs on Pressurizer Spray Valve PCV-4-455B,RCS Leakage Discovered in Unused & Capped Packing Leakoff Line.Caused by Failure of Stem Seal Bellows & Crack in Nipple | |
| 05000251/LER-1981-008, Forwards LER 81-008/03L-0 | Forwards LER 81-008/03L-0 | |
| 05000250/LER-1981-008-03, /03L-0:on 810416,crack Found in Weld on Drain Line from Charging Sys Downstream of Regenerative Heat Exchanger. Probably Caused by Stress Due to Line Vibration.Defective Area Cut Out,Nipple Shortened & Weld Replaced | /03L-0:on 810416,crack Found in Weld on Drain Line from Charging Sys Downstream of Regenerative Heat Exchanger. Probably Caused by Stress Due to Line Vibration.Defective Area Cut Out,Nipple Shortened & Weld Replaced | |
| 05000250/LER-1981-008, Forwards LER 81-008/03L-0 | Forwards LER 81-008/03L-0 | |
| 05000251/LER-1981-009, Forwards LER 81-009/03L-0 | Forwards LER 81-009/03L-0 | |
| 05000251/LER-1981-009-03, /03L-0:on 810728,bus 4A Failed to Transfer Properly (Startup Acb 4AA05 Did Not Close After Auxiliary Acb 4AA02 Tripped).Probably Caused by Transfer Inhibit Relay 162/4A2 W/Loose Crimp on Coil Wire.Relay Replaced | /03L-0:on 810728,bus 4A Failed to Transfer Properly (Startup Acb 4AA05 Did Not Close After Auxiliary Acb 4AA02 Tripped).Probably Caused by Transfer Inhibit Relay 162/4A2 W/Loose Crimp on Coil Wire.Relay Replaced | |
| 05000250/LER-1981-009, Forwards LER 81-009/03L-0 | Forwards LER 81-009/03L-0 | |
| 05000250/LER-1981-009-03, /03L-0:on 810420,while Performing Low Power Physics Testing,Reactor Protection Bistables Associated W/ N-43 Found Not in Trip Mode While Instrument Used as Input. Caused by Procedural Inadequacy | /03L-0:on 810420,while Performing Low Power Physics Testing,Reactor Protection Bistables Associated W/ N-43 Found Not in Trip Mode While Instrument Used as Input. Caused by Procedural Inadequacy | |
| 05000250/LER-1981-010, Forwards LER 81-010/03L-0 | Forwards LER 81-010/03L-0 | |
| 05000251/LER-1981-010-03, /03L-0:on 810903,while Surveillance Testing, Auxiliary Feedwater Pump a Could Not Be Properly Tripped & Was Removed for Repair.Caused by Loose Set Screw & Misaligned Yoke.Yoke & Set Screw Repaired | /03L-0:on 810903,while Surveillance Testing, Auxiliary Feedwater Pump a Could Not Be Properly Tripped & Was Removed for Repair.Caused by Loose Set Screw & Misaligned Yoke.Yoke & Set Screw Repaired | |
| 05000250/LER-1981-010-03, /03L-0:on 810501,component Cooling Water Pump 3A Did Not Start During Routine Equipment Rotation.Caused by Closing Latch Spring in Pump Circuit Breaker Detaching, Preventing Charging of Closing Springs.Breaker Repaired | /03L-0:on 810501,component Cooling Water Pump 3A Did Not Start During Routine Equipment Rotation.Caused by Closing Latch Spring in Pump Circuit Breaker Detaching, Preventing Charging of Closing Springs.Breaker Repaired | |
| 05000251/LER-1981-010, Forwards LER 81-010/03L-0 | Forwards LER 81-010/03L-0 | |
| 05000250/LER-1981-011-03, /03L-0:on 810506,two Electrical Penetration Fire Barriers Found Nonfunctional During Implementation of Surveillance Per Tech Specs.Caused by Incomplete Installation.Personnel Readvised of Fireproofing Procedure | /03L-0:on 810506,two Electrical Penetration Fire Barriers Found Nonfunctional During Implementation of Surveillance Per Tech Specs.Caused by Incomplete Installation.Personnel Readvised of Fireproofing Procedure | |
| 05000250/LER-1981-011, Forwards LER 81-011/03L-0 | Forwards LER 81-011/03L-0 | |
| 05000251/LER-1981-011-01, /01T-0:on 811021,high Head Safety Injection Line to Cold Legs Found to Be Obstructed During Full Flow Test on Discharge Check Valve of Pumps.Caused by Reduced Temp Due to Missing Insulation Near 4-inch Tee at Bit Inlet | /01T-0:on 811021,high Head Safety Injection Line to Cold Legs Found to Be Obstructed During Full Flow Test on Discharge Check Valve of Pumps.Caused by Reduced Temp Due to Missing Insulation Near 4-inch Tee at Bit Inlet | |
| 05000251/LER-1981-011, Forwards LER 81-011/01T-0 | Forwards LER 81-011/01T-0 | |
| 05000250/LER-1981-012, Forwards LER 81-012/09T-0 | Forwards LER 81-012/09T-0 | |
| 05000250/LER-1981-012-09, /09T-0:on 811020,voltage Spike Discovered to Have Potential to Cause arc-over & Subsequent Open Circuit at Junction Between Coil Winding & Lead Wire.Caused by Design Deficiency.Affected Coils Replaced During Current Outage | /09T-0:on 811020,voltage Spike Discovered to Have Potential to Cause arc-over & Subsequent Open Circuit at Junction Between Coil Winding & Lead Wire.Caused by Design Deficiency.Affected Coils Replaced During Current Outage | |
| 05000251/LER-1981-012-03, /03L-0:on 811124,during Safeguard Sys Testing,Bus Clearing Relays Did Not Pick Up 4A Bus.Emergency Diesel Generator Did Not Close in on 4A Bus.Caused by Malfunction of 4kv Breaker Auxiliary Switches Associated W/Bus Logic | /03L-0:on 811124,during Safeguard Sys Testing,Bus Clearing Relays Did Not Pick Up 4A Bus.Emergency Diesel Generator Did Not Close in on 4A Bus.Caused by Malfunction of 4kv Breaker Auxiliary Switches Associated W/Bus Logic | |
| 05000251/LER-1981-012, Forwards LER 81-012/03L-0 | Forwards LER 81-012/03L-0 | |
| 05000250/LER-1981-013, Forwards Updated LER 81-013/02X-2 | Forwards Updated LER 81-013/02X-2 | |
| 05000250/LER-1981-013-02, Small Void in Concrete Found Immediately Below Equipment Hatch Barrel.Cause Not Stated.Similar Void Confirmed on Unit 4.Voids Repaired | Small Void in Concrete Found Immediately Below Equipment Hatch Barrel.Cause Not Stated.Similar Void Confirmed on Unit 4.Voids Repaired | |
