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| 05000272/LER-1978-022, Forwards LER 78-022/01T-0 | Forwards LER 78-022/01T-0 | |
| 05000272/LER-1978-022-01, /01T-0 on 780404:Fischer & Porter 10B2496 Transmitters for Coolant Low Flow Monitoring Had High Output Deviation During Seismic Test.Caused by Vibration of Mounting Plate.Design Change Initiated | /01T-0 on 780404:Fischer & Porter 10B2496 Transmitters for Coolant Low Flow Monitoring Had High Output Deviation During Seismic Test.Caused by Vibration of Mounting Plate.Design Change Initiated | |
| 05000272/LER-1978-029, Forwards LER 78-029/01X-1 | Forwards LER 78-029/01X-1 | |
| 05000272/LER-1978-029-01, /01X-1 on 780610:during Training Startups,Two Power Range Channels Found Inoperable.Caused by Personnel Error in Which Wrong Leads Were Disconnected from Reactivity Computer.Procedures Revised | /01X-1 on 780610:during Training Startups,Two Power Range Channels Found Inoperable.Caused by Personnel Error in Which Wrong Leads Were Disconnected from Reactivity Computer.Procedures Revised | |
| 05000272/LER-1978-035-03, /03L-0:on 780630,gas Starting Turbine Relay Operation Caused Loss of Power to Station Power Transformer. Caused by Personnel Error in Preparing Unit for Svc.Operator Reinstructed on Proper Breaker Operation | /03L-0:on 780630,gas Starting Turbine Relay Operation Caused Loss of Power to Station Power Transformer. Caused by Personnel Error in Preparing Unit for Svc.Operator Reinstructed on Proper Breaker Operation | |
| 05000272/LER-1978-035, Forwards LER 78-035/03L-0 | Forwards LER 78-035/03L-0 | |
| 05000272/LER-1978-043-03, /03L-0 on 780808:during Normal Oper,After 45% Pwr Reduction to Less than 50% for Maint,Reactor Pwr Increased to 51%.Deviation Alarm Would Not Clear & QPTR Was 1.03%.QPTR Was Not Discovered Sooner Because of Alarm Indications | /03L-0 on 780808:during Normal Oper,After 45% Pwr Reduction to Less than 50% for Maint,Reactor Pwr Increased to 51%.Deviation Alarm Would Not Clear & QPTR Was 1.03%.QPTR Was Not Discovered Sooner Because of Alarm Indications | |
| 05000272/LER-1978-043, Forwards LER 78-043/03L-0 | Forwards LER 78-043/03L-0 | |
| 05000272/LER-1978-046, :Number Not Used |
- Number Not Used
| |
| 05000272/LER-1978-061, Forwards LER 78-061/01X-2 | Forwards LER 78-061/01X-2 | |
| 05000272/LER-1978-061-01, /01X-2 on 780907:noted Defect in Protection Sys Which Could Allow Airborne Activity to Be Released to Outside Atmosphere.Caused by Design Deficiency.Design Change Installed in Protection Sys | /01X-2 on 780907:noted Defect in Protection Sys Which Could Allow Airborne Activity to Be Released to Outside Atmosphere.Caused by Design Deficiency.Design Change Installed in Protection Sys | |
| 05000272/LER-1978-062, Forwards LER 78-062/03L | Forwards LER 78-062/03L | |
| 05000272/LER-1978-062-03, /03L-0 on 780913:during Normal Oper the 12 Reactor Coolant Flow Channel 2 Was Not Indicating Due to Failure of a Hagan Controls Signal Isolator | /03L-0 on 780913:during Normal Oper the 12 Reactor Coolant Flow Channel 2 Was Not Indicating Due to Failure of a Hagan Controls Signal Isolator | |
| 05000272/LER-1978-063-03, /03X-1 on 780910:containment Fan Cooling Unit 13 Inoperable. Caused by Flow Control Transmitter Failure Due to Silt Buildup in Low Pressure Sensing Line.Transmitter Cleaned & Sensing Line Blown Out | /03X-1 on 780910:containment Fan Cooling Unit 13 Inoperable. Caused by Flow Control Transmitter Failure Due to Silt Buildup in Low Pressure Sensing Line.Transmitter Cleaned & Sensing Line Blown Out | |
| 05000272/LER-1978-063, Forwards LER 78-063/03X-1 | Forwards LER 78-063/03X-1 | |
| 05000272/LER-1978-064-03, /03L-0 on 780912:reactor Trip Setpoint Greater than T/S Limit During Check of Pressure Protec Channel 2. Caused by Unstable Output from Comparator Feeding Trip Bistable.Comparator Replaced | /03L-0 on 780912:reactor Trip Setpoint Greater than T/S Limit During Check of Pressure Protec Channel 2. Caused by Unstable Output from Comparator Feeding Trip Bistable.Comparator Replaced | |
| 05000272/LER-1978-064, Forwards LER 78-064/03L-0 | Forwards LER 78-064/03L-0 | |
| 05000272/LER-1978-067, Forwards LER 78-067/03X-1 | Forwards LER 78-067/03X-1 | |
| 05000272/LER-1978-067-03, /03X-1 on 780929:during Normal Operation,Resident NRC Inspector Noted Missing Fire Barrier in Cable Penetration.Caused by Failure of Administrative Controls. Penetration Immediately Sealed | /03X-1 on 780929:during Normal Operation,Resident NRC Inspector Noted Missing Fire Barrier in Cable Penetration.Caused by Failure of Administrative Controls. Penetration Immediately Sealed | |
| 05000272/LER-1978-069-03, /03L-0:on 781011,while Investigating Diesel 1B Alarm,Heater Leaking Chromated Water Into pre-lube Pump Motor Discovered.Caused by Corrosion of Element Sheath in Two of Three Heater Elements | /03L-0:on 781011,while Investigating Diesel 1B Alarm,Heater Leaking Chromated Water Into pre-lube Pump Motor Discovered.Caused by Corrosion of Element Sheath in Two of Three Heater Elements | |
| 05000272/LER-1978-069, Forwards LER 78-069/03L-0 | Forwards LER 78-069/03L-0 | |
| 05000272/LER-1978-070, Supplemental LER 78-070/01X-1:on 781021,during Mode 4 Operation,While Heating Up to Enter Mode 3,high Flow Through RCP Seals & Other Alarms Indicating RCS Leakage Were Observed.Cause Undetermined.Instructions Have Been Revised | Supplemental LER 78-070/01X-1:on 781021,during Mode 4 Operation,While Heating Up to Enter Mode 3,high Flow Through RCP Seals & Other Alarms Indicating RCS Leakage Were Observed.Cause Undetermined.Instructions Have Been Revised | |
| 05000272/LER-1978-070-01, /01T-0:on 781021,during Mode 4 Operation,While Heating Up to Enter Mode 3,high Flow Through RCP Seals Noted & Alarms Went Off Indicating RCS Leakage.Cause Unknown | /01T-0:on 781021,during Mode 4 Operation,While Heating Up to Enter Mode 3,high Flow Through RCP Seals Noted & Alarms Went Off Indicating RCS Leakage.Cause Unknown | |
| 05000272/LER-1978-071, Forwards LER 78-071/01T-0 | Forwards LER 78-071/01T-0 | |
| 05000272/LER-1978-071-01, /01T-0:on 781023:during Mode 5,fire Pumps 1 & 2 Put in Manual Due to Low Air Pressure Causing Actuation of air-operated Deluge Valves.Station Air Compressors Could Not Be Started Due to Low Cooling Water Flow | /01T-0:on 781023:during Mode 5,fire Pumps 1 & 2 Put in Manual Due to Low Air Pressure Causing Actuation of air-operated Deluge Valves.Station Air Compressors Could Not Be Started Due to Low Cooling Water Flow | |
| 05000272/LER-1978-072-01, /01X-1:on 781107,svc Water Isolation Valves to All Five Containment Fan Coil Units Found Tripped Closed.Caused by Design Deficiency in Installation of RMS Detectors for Containment Fan Coil Unit Svc Water.Detectors Shielded | /01X-1:on 781107,svc Water Isolation Valves to All Five Containment Fan Coil Units Found Tripped Closed.Caused by Design Deficiency in Installation of RMS Detectors for Containment Fan Coil Unit Svc Water.Detectors Shielded | |
| 05000272/LER-1978-072, Forwards LER 78-072/01X-1.Detailed Event Analysis Encl | Forwards LER 78-072/01X-1.Detailed Event Analysis Encl | |
| 05000272/LER-1978-073, Forwards LER 78-073/01X-1.Detailed Event Analysis Encl | Forwards LER 78-073/01X-1.Detailed Event Analysis Encl | |
| 05000272/LER-1978-073-01, /01X-1:on 781127,loss of Vital Instrument Bus 1B de-energized RCP Breaker Open Relay in Solid State Protection Sys,Initiating Reactor Trip.Caused by Failure of Output Transformer in Supply Inverter | /01X-1:on 781127,loss of Vital Instrument Bus 1B de-energized RCP Breaker Open Relay in Solid State Protection Sys,Initiating Reactor Trip.Caused by Failure of Output Transformer in Supply Inverter | |
| 05000272/LER-1978-075, Supplemental LER 78-075/03X-1:on 781130,while Containment Entry in Progress,Inner Door of Air Lock Elevation 130 Ft Would Not Fully Open.Caused by Failed Cam Roller on Inner Door Operating Mechanism.Cam Roller Replaced | Supplemental LER 78-075/03X-1:on 781130,while Containment Entry in Progress,Inner Door of Air Lock Elevation 130 Ft Would Not Fully Open.Caused by Failed Cam Roller on Inner Door Operating Mechanism.Cam Roller Replaced | |
| 05000272/LER-1978-075-03, /03L on 781130:during Oper W/Containment Entry in Progress,Inner Door of Air Lock 130 Would Not Fully Open, Caused by Failed Cam Roller on Inner Door Operating Mechanism.Air Lock Repaired,Tested,Returned to Svc | /03L on 781130:during Oper W/Containment Entry in Progress,Inner Door of Air Lock 130 Would Not Fully Open, Caused by Failed Cam Roller on Inner Door Operating Mechanism.Air Lock Repaired,Tested,Returned to Svc | |
| 05000272/LER-1978-076, Forwards LER 78-076/03L-0 | Forwards LER 78-076/03L-0 | |
| 05000272/LER-1978-076-03, /03L-0 on 781208:during Surveillance of Meteorological Instruments,Noted That Normal Power Had Failed & Inverter Had Not Shifted to Batteries.No Cause for Failure Discerned;Inverter Tested Satisfactorily | /03L-0 on 781208:during Surveillance of Meteorological Instruments,Noted That Normal Power Had Failed & Inverter Had Not Shifted to Batteries.No Cause for Failure Discerned;Inverter Tested Satisfactorily | |
| 05000272/LER-1978-077-03, /03L-0 on 781128:pressurizer Level Read 10% Higher than Other Channels.Calibr of Sensor Showed Tech Spec Limit for Low Level Trip Was Exceeded by 2% Due to Failure of Strain Gauge in Pressurizer Level Sensor | /03L-0 on 781128:pressurizer Level Read 10% Higher than Other Channels.Calibr of Sensor Showed Tech Spec Limit for Low Level Trip Was Exceeded by 2% Due to Failure of Strain Gauge in Pressurizer Level Sensor | |
| 05000272/LER-1978-077, Forwards LER 78-077/03L-0 | Forwards LER 78-077/03L-0 | |
| 05000272/LER-1978-078-03, /03L-0 on 781130:channel Checks Showed Deviation Between Steam Flow Channels I & II of Steam Generator 13. Caused by Transmitter Zero Shift | /03L-0 on 781130:channel Checks Showed Deviation Between Steam Flow Channels I & II of Steam Generator 13. Caused by Transmitter Zero Shift | |
| 05000272/LER-1978-078, Forwards LER 78-078/03L-0 | Forwards LER 78-078/03L-0 | |
| 05000272/LER-1978-079, Forwards LER 78-079/03L-0 | Forwards LER 78-079/03L-0 | |
| 05000272/LER-1978-079-03, /03L-0 on 781201:steam Generator 12,level Channel III Found to Be Inoperable;Channel Bistables Tripped Per Tech Specs.Caused by Partially Clogged Sensing Lines | /03L-0 on 781201:steam Generator 12,level Channel III Found to Be Inoperable;Channel Bistables Tripped Per Tech Specs.Caused by Partially Clogged Sensing Lines | |
| 05000272/LER-1978-080, Forwards LER 78-080/03L-0 | Forwards LER 78-080/03L-0 | |
| 05000272/LER-1978-080-03, /03L-0 on 781228:leak Rate Test Showed Excessive Seal Leakage & Air Lock Was Declared Inoperable.Caused by Failure of Outer Door Seal from Normal Wear of the Seal During Air Lock Operation | /03L-0 on 781228:leak Rate Test Showed Excessive Seal Leakage & Air Lock Was Declared Inoperable.Caused by Failure of Outer Door Seal from Normal Wear of the Seal During Air Lock Operation | |
| 05000272/LER-1978-081-03, /03L-0 on 781206:noted That Sump Pump Magnetrol Was Overdue for Calibr.Caused by Incorrect Assignment of Responsibility for 18 Month Calibr Surveillance | /03L-0 on 781206:noted That Sump Pump Magnetrol Was Overdue for Calibr.Caused by Incorrect Assignment of Responsibility for 18 Month Calibr Surveillance | |
| 05000272/LER-1978-081, Forwards LER 78-081/03L-0 | Forwards LER 78-081/03L-0 | |
| 05000272/LER-1978-082-03, /03L-0 on 781228:zero Flow Was Indicated on Plant Vent Recorder Because of Frozen Condensation in Transmitter Sensing Lines.Caused by de-energized Temporary Heat Tracing | /03L-0 on 781228:zero Flow Was Indicated on Plant Vent Recorder Because of Frozen Condensation in Transmitter Sensing Lines.Caused by de-energized Temporary Heat Tracing | |
| 05000272/LER-1978-082, Forwards LER 78-082/03L-0 | Forwards LER 78-082/03L-0 | |
| 05000272/LER-1978-083, Forwards LER 78-083/03L-0 | Forwards LER 78-083/03L-0 | |
| 05000272/LER-1978-083-03, /03L-0 on 781213:Number 13 Auxiliary Feed Pump Tripped on Overspeed Because Governor Operating Speed Was Set at 4200 Rpm.Governor Speed Reset & 3 Tests Confirmed Operability | /03L-0 on 781213:Number 13 Auxiliary Feed Pump Tripped on Overspeed Because Governor Operating Speed Was Set at 4200 Rpm.Governor Speed Reset & 3 Tests Confirmed Operability | |
| 05000272/LER-1978-084-03, /03L-0 on 781127:boron Injection Tank Rendered Inoperable Due to Reduced Boron Concentration Resulting from Safety Injection | /03L-0 on 781127:boron Injection Tank Rendered Inoperable Due to Reduced Boron Concentration Resulting from Safety Injection | |
| 05000272/LER-1978-084, Forwards LER 78-084/03L-0 | Forwards LER 78-084/03L-0 | |
| 05000272/LER-1978-085-03, /03L-0 on 781211:svc Water Flow Through Fan Coil Unit Was Less than Required 2500 Gal Per Minute.Caused When Solenoid Control Coil Developed an Open Circuit | /03L-0 on 781211:svc Water Flow Through Fan Coil Unit Was Less than Required 2500 Gal Per Minute.Caused When Solenoid Control Coil Developed an Open Circuit | |
