| | | Reporting criterion |
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| 05000265/LER-1979-001-03, /03L-0 on 790104:during Monthly Operability Test, Inlet Air Heater on a Standby Gas Treatment Sys Was Found Inoperable.Caused by Setpoint Drift of Flow Switch 1/2-7541-8A | /03L-0 on 790104:during Monthly Operability Test, Inlet Air Heater on a Standby Gas Treatment Sys Was Found Inoperable.Caused by Setpoint Drift of Flow Switch 1/2-7541-8A | |
| 05000254/LER-1979-001, Forwards LER 79-001/03L-0 | Forwards LER 79-001/03L-0 | |
| 05000265/LER-1979-001, Forwards LER 79-001/03L-0 | Forwards LER 79-001/03L-0 | |
| 05000254/LER-1979-001-03, /03L-0 on 790107:high Steam Line Flow Alarm & Automatic Isolation of Reactor Core Isolation Cooling Steam Supply Line Occurred.Caused by Failure of Micro Switch Inside Steam Line High Flow Differential Pressure Switch | /03L-0 on 790107:high Steam Line Flow Alarm & Automatic Isolation of Reactor Core Isolation Cooling Steam Supply Line Occurred.Caused by Failure of Micro Switch Inside Steam Line High Flow Differential Pressure Switch | |
| 05000265/LER-1979-002, Forwards LER 79-002/03L-0 | Forwards LER 79-002/03L-0 | |
| 05000265/LER-1979-002-03, /03L-0 on 790110:during Routine Insp of Reactor Water Cleanup Pump Rooms,Small Leak Was Found on 2-1205B Cleanup Pump Suction Line.Cause Unknown.Leak Was Isolated & Linear Indication on Flange Ground Out | /03L-0 on 790110:during Routine Insp of Reactor Water Cleanup Pump Rooms,Small Leak Was Found on 2-1205B Cleanup Pump Suction Line.Cause Unknown.Leak Was Isolated & Linear Indication on Flange Ground Out | |
| 05000254/LER-1979-002-03, /03L-0 on 790110:during Freon Test,Noted That Freon Penetration Through Charcoal Absorbers Exceeded Tech Spec Max.Caused by One of Charcoal Clamping Levers Not Being Fully Latched | /03L-0 on 790110:during Freon Test,Noted That Freon Penetration Through Charcoal Absorbers Exceeded Tech Spec Max.Caused by One of Charcoal Clamping Levers Not Being Fully Latched | |
| 05000254/LER-1979-002, Forwards LER 79-002/03L-0 | Forwards LER 79-002/03L-0 | |
| 05000265/LER-1979-003-03, /03L-0 on 790214:during High Temp Isolation Calibr Procedure,Temp Switch TS 2-2373A Was Found to Trip in Excess of Tech Spec Limit.Caused by Setpoint Drift.Switch Recalibrated & Retested | /03L-0 on 790214:during High Temp Isolation Calibr Procedure,Temp Switch TS 2-2373A Was Found to Trip in Excess of Tech Spec Limit.Caused by Setpoint Drift.Switch Recalibrated & Retested | |
| 05000254/LER-1979-003, Forwards LER 79-003/03L-0 | Forwards LER 79-003/03L-0 | |
| 05000265/LER-1979-003, Forwards LER 79-003/03L-0 | Forwards LER 79-003/03L-0 | |
| 05000254/LER-1979-003-03, /03L-1 on 790119:MSIV Local Leak Rate Showed Seven Valves Leaking Excessively.Causes Unspecified.Valve Stroke Adjusted,Certain Valves Dismantled,Discs & Seats Were Lapped & Machined | /03L-1 on 790119:MSIV Local Leak Rate Showed Seven Valves Leaking Excessively.Causes Unspecified.Valve Stroke Adjusted,Certain Valves Dismantled,Discs & Seats Were Lapped & Machined | |
| 05000254/LER-1979-004, Forwards LER 79-004/01T-0 | Forwards LER 79-004/01T-0 | |
| 05000254/LER-1979-004-01, /01T-0 on 790122:piece of Control Rod Drive Return Nozzle Thermal Sleeve Retaining Ring Was Missing.Cause Unknown | /01T-0 on 790122:piece of Control Rod Drive Return Nozzle Thermal Sleeve Retaining Ring Was Missing.Cause Unknown | |
| 05000265/LER-1979-004-03, /03L-0 on 790211:suction Isolation Valve Mo 2-1001-50 Failed to Close from Control Room.Caused by Failed Circuit Breaker in Valve Motor Control Center. Valve Taken Out of Svc for Repair During Outages | /03L-0 on 790211:suction Isolation Valve Mo 2-1001-50 Failed to Close from Control Room.Caused by Failed Circuit Breaker in Valve Motor Control Center. Valve Taken Out of Svc for Repair During Outages | |
| 05000265/LER-1979-004, Forwards LER 79-004/03L-0 | Forwards LER 79-004/03L-0 | |
| 05000254/LER-1979-005-03, /03L-0 on 790123:during Unit 1/2 Diesel Generator Monthly Load Test Qos 6600-1,pilot Solenoid Valve to Air Starting Motors Failed & Unit 1/2 Diesel Was Shutdown. Caused by Mechanical Failure of Valve.Valve Was Replaced | /03L-0 on 790123:during Unit 1/2 Diesel Generator Monthly Load Test Qos 6600-1,pilot Solenoid Valve to Air Starting Motors Failed & Unit 1/2 Diesel Was Shutdown. Caused by Mechanical Failure of Valve.Valve Was Replaced | |
| 05000254/LER-1979-005, Forwards LER 79-005/03L-0 | Forwards LER 79-005/03L-0 | |
| 05000265/LER-1979-005-03, /03L-0 on 790223:2A Recirculation Motor Generator Field Breaker Opened,Causing Flow Mismatch.Caused by Loosening of Coupling Between Main Shaft & Recirculation Motor Generator Set Tachometer.Tachometer Coupling Reset | /03L-0 on 790223:2A Recirculation Motor Generator Field Breaker Opened,Causing Flow Mismatch.Caused by Loosening of Coupling Between Main Shaft & Recirculation Motor Generator Set Tachometer.Tachometer Coupling Reset | |
| 05000265/LER-1979-005, Forwards LER 79-005/03L-0 | Forwards LER 79-005/03L-0 | |
| 05000254/LER-1979-006-03, /03L-0 on 790125:during Primary Containment Isolation Valve Closure Timing,Valve AO 1-1601-21 Failed to Close in 10 Seconds.Caused by Improper Adjustment of Valve Speed Control from Operational Wear.Control Was Readjusted | /03L-0 on 790125:during Primary Containment Isolation Valve Closure Timing,Valve AO 1-1601-21 Failed to Close in 10 Seconds.Caused by Improper Adjustment of Valve Speed Control from Operational Wear.Control Was Readjusted | |
| 05000254/LER-1979-006, Forwards LER 79-006/03L-0 | Forwards LER 79-006/03L-0 | |
| 05000254/LER-1979-007, Forwards LER 79-007/03L-0 | Forwards LER 79-007/03L-0 | |
| 05000254/LER-1979-007-03, /03L-0 on 790201:main Steam Line Leak Detection Temp Switches TS 1-261-16A,MTS 1-261-18A & TS 1-261-15C Tripped in Excess of Setpoint.Caused by Instrument Setpoint Drift.Temp Switches Recalibrated | /03L-0 on 790201:main Steam Line Leak Detection Temp Switches TS 1-261-16A,MTS 1-261-18A & TS 1-261-15C Tripped in Excess of Setpoint.Caused by Instrument Setpoint Drift.Temp Switches Recalibrated | |
| 05000254/LER-1979-008, Forwards LER 79-008/03L-0 | Forwards LER 79-008/03L-0 | |
| 05000254/LER-1979-008-03, /03L-0 on 790202:temp Switch TS-1-1360-15D Had Trip Setpoint in Excess of Tech Spec Limit.Caused by Setpoint Drift.Switch Recalibrated & Satisfactorily Tested | /03L-0 on 790202:temp Switch TS-1-1360-15D Had Trip Setpoint in Excess of Tech Spec Limit.Caused by Setpoint Drift.Switch Recalibrated & Satisfactorily Tested | |
| 05000254/LER-1979-009-03, /03L-0 on 790203:bed Plate Drain Valves AO 1-4999-57,58 & 60 Did Not Fully Close.Caused by Corrosion & Failure of Internal Return Springs.Springs Replaced & Valves Satisfactorily Retested | /03L-0 on 790203:bed Plate Drain Valves AO 1-4999-57,58 & 60 Did Not Fully Close.Caused by Corrosion & Failure of Internal Return Springs.Springs Replaced & Valves Satisfactorily Retested | |
| 05000254/LER-1979-009, Forwards LER 79-009/03L-0 | Forwards LER 79-009/03L-0 | |
| 05000265/LER-1979-009, Forwards LER 79-009/03L-0.Corrects Docket Number of Original Forwarding Ltr | Forwards LER 79-009/03L-0.Corrects Docket Number of Original Forwarding Ltr | |
| 05000265/LER-1979-009-03, /03L-0:on 790429,switch Trip Positions Found at Greater than 10% of MSIV Closure.Caused by Failure to Set Field Calibr for Switch Trip Point Limit.Switches Were Adjusted to 10% Closure or Less | /03L-0:on 790429,switch Trip Positions Found at Greater than 10% of MSIV Closure.Caused by Failure to Set Field Calibr for Switch Trip Point Limit.Switches Were Adjusted to 10% Closure or Less | |
| 05000254/LER-1979-010-03, /03L-1 on 790205:diesel Fire Pump 1/2A Out of Svc Beyond Tech Spec Limit.Caused by Personnel Error.Pump Returned to Svc | /03L-1 on 790205:diesel Fire Pump 1/2A Out of Svc Beyond Tech Spec Limit.Caused by Personnel Error.Pump Returned to Svc | |
| 05000254/LER-1979-010, Forwards LER 79-010/03L-1 | Forwards LER 79-010/03L-1 | |
| 05000265/LER-1979-010, Forwards LER 79-010/03L-0 | Forwards LER 79-010/03L-0 | |
| 05000265/LER-1979-010-03, /03L-0 on 790514:2A Fuel Pool Radiation Monitor Failed Upscale & Failed Again on 790601 & 02.Caused by Failure of GM-tube in Sensor Conventor Unit.Tube Finally Replaced W/Amperex 18529 | /03L-0 on 790514:2A Fuel Pool Radiation Monitor Failed Upscale & Failed Again on 790601 & 02.Caused by Failure of GM-tube in Sensor Conventor Unit.Tube Finally Replaced W/Amperex 18529 | |
| 05000254/LER-1979-011, Forwards LER 79-011/03L-0 | Forwards LER 79-011/03L-0 | |
| 05000254/LER-1979-011-03, /03L-0 on 790202:drywell Vent Valve AO 1-1601-23 Closed in Excess of Tech Spec Max Time Limit.Caused by Worn & Leaking Seals on Air Operating pistons.U-cup Piston Seals Replaced | /03L-0 on 790202:drywell Vent Valve AO 1-1601-23 Closed in Excess of Tech Spec Max Time Limit.Caused by Worn & Leaking Seals on Air Operating pistons.U-cup Piston Seals Replaced | |
| 05000265/LER-1979-011, Forwards LER 79-011/03L-0 | Forwards LER 79-011/03L-0 | |
| 05000265/LER-1979-011-03, /03L-0 on 790521:three Cables Not Installed in Accordance W/Drawings.Caused by Error in Cable Routing During Initial Const.Reroute of Cables Will Take Place During Nov 1979 Refueling Outage | /03L-0 on 790521:three Cables Not Installed in Accordance W/Drawings.Caused by Error in Cable Routing During Initial Const.Reroute of Cables Will Take Place During Nov 1979 Refueling Outage | |
| 05000265/LER-1979-012-03, /03L-0 on 790622:nut Inadvertantly Droppoed Into Diesel Generator Winding During Preventive Maint.Outage Time of Generator Extended 20 Minutes Beyond 1.5-h Time Limit. Caused by Personnel Error | /03L-0 on 790622:nut Inadvertantly Droppoed Into Diesel Generator Winding During Preventive Maint.Outage Time of Generator Extended 20 Minutes Beyond 1.5-h Time Limit. Caused by Personnel Error | |
| 05000265/LER-1979-012, Forwards LER 79-012/03L-0 | Forwards LER 79-012/03L-0 | |
| 05000254/LER-1979-012, Forwards LER 79-012/03L-0 | Forwards LER 79-012/03L-0 | |
| 05000254/LER-1979-012-03, /03L-0 on 790214:air Found Blowing Through Weld on 3/4 Inch Vent Line.Caused by Component Failure.Vent Line Inserted Into Sockolet & re-welded | /03L-0 on 790214:air Found Blowing Through Weld on 3/4 Inch Vent Line.Caused by Component Failure.Vent Line Inserted Into Sockolet & re-welded | |
| 05000254/LER-1979-013-03, /03L-0 on 790217:check Valves 1-263-2-31B & 1-263-42A Failed to Check Flow Through Instrument Lines. Caused by Dirt in Valve Internals.Internals Removed,Cleaned & Reassembled | /03L-0 on 790217:check Valves 1-263-2-31B & 1-263-42A Failed to Check Flow Through Instrument Lines. Caused by Dirt in Valve Internals.Internals Removed,Cleaned & Reassembled | |
| 05000254/LER-1979-013, Forwards LER 79-013/03L-0 | Forwards LER 79-013/03L-0 | |
| 05000265/LER-1979-013, Forwards LER 79-013/03L-0 | Forwards LER 79-013/03L-0 | |
| 05000265/LER-1979-013-03, /031-0 on 790712:while Performing Motor Operated Valve Operability Test,Thermal Overload Relay for Pump Suction Valve 1C RHR Tripped & Could Not Be Reopened.Caused by Loose Electrical Connections at Breaker | /031-0 on 790712:while Performing Motor Operated Valve Operability Test,Thermal Overload Relay for Pump Suction Valve 1C RHR Tripped & Could Not Be Reopened.Caused by Loose Electrical Connections at Breaker | |
| 05000254/LER-1979-014, Forwards LER 79-014/03L-0 | Forwards LER 79-014/03L-0 | |
| 05000265/LER-1979-014, Forwards LER 79-014/03L-0 | Forwards LER 79-014/03L-0 | |
| 05000265/LER-1979-014-03, /031-0 on 790723:steam Inlet Valve Mo 2-1301-16 Failed to Close During Reactor Core Isolation Cooling Monthly Valve Operability Test.Caused by Component Failure of Torque Switch on Valve Mo 2-1301-16.Switch Replaced | /031-0 on 790723:steam Inlet Valve Mo 2-1301-16 Failed to Close During Reactor Core Isolation Cooling Monthly Valve Operability Test.Caused by Component Failure of Torque Switch on Valve Mo 2-1301-16.Switch Replaced | |
| 05000254/LER-1979-014-03, /03L-0 on 790214:automatic Blowdown Timers Exceeded Tech Spec Limits During Tests.Caused by Instrument Setpoint Drift.One Timer Readjusted,Another Replaced | /03L-0 on 790214:automatic Blowdown Timers Exceeded Tech Spec Limits During Tests.Caused by Instrument Setpoint Drift.One Timer Readjusted,Another Replaced | |
