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| 05000250/LER-1978-002-01, /01T-0:on 780324,util Notified by NSSS Vendor That Logic Inconsistency Identified in NRC Approved 10CFR50.46 App K,Eccs Evaluation Model.Cause Not Stated.Review Underway | /01T-0:on 780324,util Notified by NSSS Vendor That Logic Inconsistency Identified in NRC Approved 10CFR50.46 App K,Eccs Evaluation Model.Cause Not Stated.Review Underway | |
| 05000250/LER-1978-002, Forwards LER 78-002/01T-0 | Forwards LER 78-002/01T-0 | |
| 05000250/LER-1978-003-01, /01T-0:on 780324,util Notified by NSSS Vendor That Logic Inconsistency Identified in NRC Approved 10CFR50.46 App K,Eccs Evaluation Model.Cause Not Stated.Review Underway | /01T-0:on 780324,util Notified by NSSS Vendor That Logic Inconsistency Identified in NRC Approved 10CFR50.46 App K,Eccs Evaluation Model.Cause Not Stated.Review Underway | |
| 05000250/LER-1978-003, Forwards LER 78-003/01T-0 | Forwards LER 78-003/01T-0 | |
| 05000251/LER-1978-007, Forwards LER 78-007/03L-0 | Forwards LER 78-007/03L-0 | |
| 05000251/LER-1978-007-03, /03L-0 on 780710:for 11.5-h,condensate Storage Tank Level Was Below Tech Spec Limits.Caused by Condenser Leaks in Both Units.Water Treatment Was Shut Down & Storage Tanks Filled | /03L-0 on 780710:for 11.5-h,condensate Storage Tank Level Was Below Tech Spec Limits.Caused by Condenser Leaks in Both Units.Water Treatment Was Shut Down & Storage Tanks Filled | |
| 05000251/LER-1978-008-01, /01T-0 on 780911:Restricting Orifices Not Installed in Branch Connections from Containment Spray Headers to Emergency Containment Filter Spray Sys.Proper Orifices Will Be Installed.(Encl to 7809220126) | /01T-0 on 780911:Restricting Orifices Not Installed in Branch Connections from Containment Spray Headers to Emergency Containment Filter Spray Sys.Proper Orifices Will Be Installed.(Encl to 7809220126) | |
| 05000251/LER-1978-008, Update to LER 78-008/01X-1 on 780828:restricting Orifices Not Installed in Branch Connections from Containment Spray Headers to Emergency Containment Filter Spray Sys.Caused by Inadvertent Omission.Qc/Qa Program Initiated | Update to LER 78-008/01X-1 on 780828:restricting Orifices Not Installed in Branch Connections from Containment Spray Headers to Emergency Containment Filter Spray Sys.Caused by Inadvertent Omission.Qc/Qa Program Initiated | |
| 05000251/LER-1978-009-03, /03L-0 on 780831:20 Safety Related Hydraulic Snubbers Failed Functional Tests Due to Control Block Poppet Valve & Relief Valve Malfunctions & Excessive Main Cylinder Wear.Hydraulic Type Replaced W/Mechanical Type Snubbers | /03L-0 on 780831:20 Safety Related Hydraulic Snubbers Failed Functional Tests Due to Control Block Poppet Valve & Relief Valve Malfunctions & Excessive Main Cylinder Wear.Hydraulic Type Replaced W/Mechanical Type Snubbers | |
| 05000251/LER-1978-009, Forwards LER 78-009/03L-0 | Forwards LER 78-009/03L-0 | |
| 05000251/LER-1978-010-03, /03L-1 on 780911:Spent Fuel Pit Cooling Pumps Mech Seal Failed Causing 150 Gallons of Radioactively Contaminated Water to Leak to Paved Area Outside Pump Room Caused by Inadequately Lubricated Pump Bearing | /03L-1 on 780911:Spent Fuel Pit Cooling Pumps Mech Seal Failed Causing 150 Gallons of Radioactively Contaminated Water to Leak to Paved Area Outside Pump Room Caused by Inadequately Lubricated Pump Bearing | |
| 05000251/LER-1978-010, Forwards LER 78-010/03L-1 | Forwards LER 78-010/03L-1 | |
| 05000251/LER-1978-011, Forwards LER 78-011/03L-0 | Forwards LER 78-011/03L-0 | |
| 05000251/LER-1978-011-03, /03L-0:on 780920,Preventive Maint Checks of MSIV Solenoid Valves Revealed Defective Coils.Caused by High Temp & Moisture in Area.Addl Preventive Maint Planned | /03L-0:on 780920,Preventive Maint Checks of MSIV Solenoid Valves Revealed Defective Coils.Caused by High Temp & Moisture in Area.Addl Preventive Maint Planned | |
| 05000251/LER-1978-012, Forwards LER 78-012/01T-0 | Forwards LER 78-012/01T-0 | |
| 05000251/LER-1978-012-01, /01T-0:on 780927,no Adverse Affect Noted from Substitution of Fuel Assembly N-07 for N-04 in Core Position F-14.Reload 5 Safety Evaluation Remains Valid | /01T-0:on 780927,no Adverse Affect Noted from Substitution of Fuel Assembly N-07 for N-04 in Core Position F-14.Reload 5 Safety Evaluation Remains Valid | |
| 05000250/LER-1978-013, Forwards LER 78-013/03L-0 | Forwards LER 78-013/03L-0 | |
| 05000251/LER-1978-013, Forwards LER 78-013/03L-0 | Forwards LER 78-013/03L-0 | |
| 05000250/LER-1978-013-03, /03L-0:on 780929,condensate Storage Tank Contained Less than 185,000 Gallons for Appox 4 H.Caused by Steam Generator Blowdown W/No Demineralized Makeup Water | /03L-0:on 780929,condensate Storage Tank Contained Less than 185,000 Gallons for Appox 4 H.Caused by Steam Generator Blowdown W/No Demineralized Makeup Water | |
| 05000251/LER-1978-013-03, /03L-0:on 780929,condensate Storage Tank Held Less than 185,000 Gallons for About 8 H.Caused by Leaks in Condenser Tubes,Necessitating Increased Steam Generator Blowdown.Flow Demand Exceeded Output of Treatment Plant | /03L-0:on 780929,condensate Storage Tank Held Less than 185,000 Gallons for About 8 H.Caused by Leaks in Condenser Tubes,Necessitating Increased Steam Generator Blowdown.Flow Demand Exceeded Output of Treatment Plant | |
| 05000250/LER-1978-014, Forwards LER 78-014/03L-0 | Forwards LER 78-014/03L-0 | |
| 05000250/LER-1978-014-03, /03L-0:on 780929,comparator Power Supply FC-3-484 Malfunctioned.Caused by Faulty Regulating Amplifier in Comparator Power Supply Board.Amplifier Replaced & Comparator Tested Satisfactorily | /03L-0:on 780929,comparator Power Supply FC-3-484 Malfunctioned.Caused by Faulty Regulating Amplifier in Comparator Power Supply Board.Amplifier Replaced & Comparator Tested Satisfactorily | |
| 05000251/LER-1978-014-03, /03L-0 on 781002:condensate Storage Tank(Cst)Fell to 182,000 Gallons Because of Water Demand Increase for Steam Generator Blowdown Resulting from Cation Resin Bed Regeneration.Cst Filled After Resin Bed Regeneration | /03L-0 on 781002:condensate Storage Tank(Cst)Fell to 182,000 Gallons Because of Water Demand Increase for Steam Generator Blowdown Resulting from Cation Resin Bed Regeneration.Cst Filled After Resin Bed Regeneration | |
| 05000251/LER-1978-014, Forwards LER 78-014/03L-0 | Forwards LER 78-014/03L-0 | |
| 05000251/LER-1978-015, Forwards LER 78-015/01T-0 | Forwards LER 78-015/01T-0 | |
| 05000250/LER-1978-015-03, /03L-0 on 781010:19 Accessible Safety Related Snubbers Were Replaced One at a Time W/Mechanical Snubbers | /03L-0 on 781010:19 Accessible Safety Related Snubbers Were Replaced One at a Time W/Mechanical Snubbers | |
| 05000250/LER-1978-015, Forwards LER 78-015/03L-0 | Forwards LER 78-015/03L-0 | |
| 05000251/LER-1978-015-01, /01T-0 on 781106:Boron Injection Tank(Bit)Sample Showed Low Boron Level.Exact Cause Is Unknown,But It Is Suspected the Actual Bit Concentration Was Proper & the Sample Was Diluted & Invalid | /01T-0 on 781106:Boron Injection Tank(Bit)Sample Showed Low Boron Level.Exact Cause Is Unknown,But It Is Suspected the Actual Bit Concentration Was Proper & the Sample Was Diluted & Invalid | |
| 05000250/LER-1978-016-03, /03L-0 on 781025:during Pwr Oper,Intake Cooling Water Pumps Were Running When 3B Pump Motor Failed.The 3B Pump Motor Failed Because of Short Circuit in the Motor Windings | /03L-0 on 781025:during Pwr Oper,Intake Cooling Water Pumps Were Running When 3B Pump Motor Failed.The 3B Pump Motor Failed Because of Short Circuit in the Motor Windings | |
| 05000251/LER-1978-016-03, /03L-0 on 781219:process Radiation Monitors R-11 & R-12 Were Out of Svc for About 18-h.Air Sampling Blower Which Monitors R-11 & R-12 Failed Due to Normal Wear | /03L-0 on 781219:process Radiation Monitors R-11 & R-12 Were Out of Svc for About 18-h.Air Sampling Blower Which Monitors R-11 & R-12 Failed Due to Normal Wear | |
| 05000250/LER-1978-016, Forwards LER 78-016/03L-0 | Forwards LER 78-016/03L-0 | |
| 05000251/LER-1978-016, Forwards LER 78-016/03L-0 | Forwards LER 78-016/03L-0 | |
| 05000250/LER-1978-017-03, /03L-0:on 780514,improper Switching at Pratt & Whitney Substation & Incorrect Wiring of Protective Relays at Midway Substation Led to de-energization.Offsite Power Lost.Incorrect Wiring Corrected | /03L-0:on 780514,improper Switching at Pratt & Whitney Substation & Incorrect Wiring of Protective Relays at Midway Substation Led to de-energization.Offsite Power Lost.Incorrect Wiring Corrected | |
| 05000250/LER-1978-017, Forwards LER 78-017/03L-0 | Forwards LER 78-017/03L-0 | |
| 05000250/LER-1978-018, Forwards LER 78-018/03L-0 | Forwards LER 78-018/03L-0 | |
| 05000250/LER-1978-018-03, /03L-0 on 781231:A Auxiliary Feedwater Pump Had Seized Shaft.Possibly Due to Overheating,Caused by Steam Leakage on Feedwater Past Sys Valves | /03L-0 on 781231:A Auxiliary Feedwater Pump Had Seized Shaft.Possibly Due to Overheating,Caused by Steam Leakage on Feedwater Past Sys Valves | |