| | | Reporting criterion |
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| 05000255/LER-1979-001, Forwards LER 79-001/03X-1 | Forwards LER 79-001/03X-1 | |
| 05000255/LER-1979-001-03, /03L-0 on 790102:reactor Protection Sys Power Range Channels NI05,06 & 07 Bypassed W/O First Tripping NI08.Caused by Failure to Use Administrative Controls | /03L-0 on 790102:reactor Protection Sys Power Range Channels NI05,06 & 07 Bypassed W/O First Tripping NI08.Caused by Failure to Use Administrative Controls | |
| 05000255/LER-1979-002-03, /03L-0 on 790103:steam Generator Specific Conductivity Increased to 7.65 micro-mho Per Cm.Steam Generator Rate Increased & Morpholine/Hydrazine Feed Rate Decreased.Caused by Air in Leakage to Main Condenser | /03L-0 on 790103:steam Generator Specific Conductivity Increased to 7.65 micro-mho Per Cm.Steam Generator Rate Increased & Morpholine/Hydrazine Feed Rate Decreased.Caused by Air in Leakage to Main Condenser | |
| 05000255/LER-1979-003-01, /01T-0 on 790117:fitting in Fire Protection Piping for a Cooling Tower Broke.Resulting Leakage Could Not Be Isolated;Fire Pumps Placed in Manual.Break Caused by Freezing Weather Conditions | /01T-0 on 790117:fitting in Fire Protection Piping for a Cooling Tower Broke.Resulting Leakage Could Not Be Isolated;Fire Pumps Placed in Manual.Break Caused by Freezing Weather Conditions | |
| 05000255/LER-1979-004-01, /01T-0 on 790117:svc Water Pump P-7B Taken out-of- Service W/O Prior Test of Diesel Generator 1-2.Caused by Combination of Poor Judgment & Lack of Awareness of Tech Spec Requirements by Shift Operating Personnel | /01T-0 on 790117:svc Water Pump P-7B Taken out-of- Service W/O Prior Test of Diesel Generator 1-2.Caused by Combination of Poor Judgment & Lack of Awareness of Tech Spec Requirements by Shift Operating Personnel | |
| 05000255/LER-1979-005, Forwards LER 79-005/03L-0 | Forwards LER 79-005/03L-0 | |
| 05000255/LER-1979-005-03, /03L-0 on 790103:1/4-inch Drain Line in Diesel Generator Fuel Sys Broke,Spraying 100-150 Gal of Fuel Oil Onto Engine.Caused by Vibration | /03L-0 on 790103:1/4-inch Drain Line in Diesel Generator Fuel Sys Broke,Spraying 100-150 Gal of Fuel Oil Onto Engine.Caused by Vibration | |
| 05000255/LER-1979-006-01, /01T-0 on 790125:during Preparation for Leak Testing Personnel Air Lock,Found Pressure Gauge Normally Mounted on Outer Door of Air Lock Was Missing.Caused by Procedures Not Specifying Gauge Replacement After Removal | /01T-0 on 790125:during Preparation for Leak Testing Personnel Air Lock,Found Pressure Gauge Normally Mounted on Outer Door of Air Lock Was Missing.Caused by Procedures Not Specifying Gauge Replacement After Removal | |
| 05000255/LER-1979-006, Forwards LER 79-006/01T-0 | Forwards LER 79-006/01T-0 | |
| 05000255/LER-1979-007-03, /03L-0 on 790115:primary Computer Stopped.Caused by Computer Program Failure.Computer Reprogrammed to Restore Operability | /03L-0 on 790115:primary Computer Stopped.Caused by Computer Program Failure.Computer Reprogrammed to Restore Operability | |
| 05000255/LER-1979-007, Forwards LER 79-007/03L-0 | Forwards LER 79-007/03L-0 | |
| 05000255/LER-1979-008-03, /03L-0 on 790126: Tank Vent Valve (CV-3051) Opened Simultaneously w/N2 Fill Valve;Tank Pressure Dropped Below Tech Specs Limit. Caused by Electrical Short Between Wires for Fill & Vent Valves | /03L-0 on 790126: Tank Vent Valve (CV-3051) Opened Simultaneously w/N2 Fill Valve;Tank Pressure Dropped Below Tech Specs Limit. Caused by Electrical Short Between Wires for Fill & Vent Valves | |
| 05000255/LER-1979-008, Forwards LER 79-008/03L-0 | Forwards LER 79-008/03L-0 | |
| 05000255/LER-1979-009-01, /01X-1 on 790220:design Review Indicated Butterfly Valves May Not Close Under Accident Conditions.Caused by Vague Purchase Specs Which Did Not Include Requirements for Closing Against Pressure | /01X-1 on 790220:design Review Indicated Butterfly Valves May Not Close Under Accident Conditions.Caused by Vague Purchase Specs Which Did Not Include Requirements for Closing Against Pressure | |
| 05000255/LER-1979-009, Forwards LER 79-009/01X-1 | Forwards LER 79-009/01X-1 | |
| 05000255/LER-1979-010-03, /03L-0 on 790207:during Resin Sluicing Operations, Manual Isolation Valve (MV-CVC502) Was Left Open,Resulting in 17 Gpm Leak to Radwaste Sys.Caused by Broken Valve Stop. Valve Stop Will Be Replaced | /03L-0 on 790207:during Resin Sluicing Operations, Manual Isolation Valve (MV-CVC502) Was Left Open,Resulting in 17 Gpm Leak to Radwaste Sys.Caused by Broken Valve Stop. Valve Stop Will Be Replaced | |
| 05000255/LER-1979-011-03, /03L-0 on 790227:primary Data Logger Was Inoperable.Caused by Multiplexer Failure at Computer Input/ Output.Faulty Relays Replaced | /03L-0 on 790227:primary Data Logger Was Inoperable.Caused by Multiplexer Failure at Computer Input/ Output.Faulty Relays Replaced | |
| 05000255/LER-1979-011, Forwards LER 79-011/03L-0 | Forwards LER 79-011/03L-0 | |
| 05000255/LER-1979-012-03, /03L-0 on 790201:during Normal Plant Operation, Primary Coolant Pump Inadvertantly Stopped.Reactor Immediately Tripped.Shutdown Margin Was Less than Specified in Tech Specs.Power Conversion Sys Was Emergency Borated | /03L-0 on 790201:during Normal Plant Operation, Primary Coolant Pump Inadvertantly Stopped.Reactor Immediately Tripped.Shutdown Margin Was Less than Specified in Tech Specs.Power Conversion Sys Was Emergency Borated | |
| 05000255/LER-1979-012, Forwards LER 79-012/03L-0 | Forwards LER 79-012/03L-0 | |
| 05000255/LER-1979-013-01, /01X-1 on 790327:level in T-82C Safety Injection Tank Decreased While Draining D Tank to Permit Increase in Boron Concentration.Caused by Seal Leakage.Cv 3004 Drain Valve Will Be Repaired During Next Refueling Outage | /01X-1 on 790327:level in T-82C Safety Injection Tank Decreased While Draining D Tank to Permit Increase in Boron Concentration.Caused by Seal Leakage.Cv 3004 Drain Valve Will Be Repaired During Next Refueling Outage | |
| 05000255/LER-1979-013, Forwards LER 79-013/01X-1 | Forwards LER 79-013/01X-1 | |
| 05000255/LER-1979-014, Forwards LER 79-014/03L-0 | Forwards LER 79-014/03L-0 | |
| 05000255/LER-1979-014-03, /03L-0 on 790315:during Normal Plant Operation, Primary Computer Stopped,Due to Computer Program Failure. Computer Reprogrammed & Restored to Operability | /03L-0 on 790315:during Normal Plant Operation, Primary Computer Stopped,Due to Computer Program Failure. Computer Reprogrammed & Restored to Operability | |
| 05000255/LER-1979-015-01, /01T-0 on 790409:refer to from Dp Hoffman to Dl Ziemann Re Pipe Supports | /01T-0 on 790409:refer to from Dp Hoffman to Dl Ziemann Re Pipe Supports | |
| 05000255/LER-1979-015, Forwards LER 79-015/01T-0 | Forwards LER 79-015/01T-0 | |
| 05000255/LER-1979-016, Forwards LER 79-016/03L-0 | Forwards LER 79-016/03L-0 | |
| 05000255/LER-1979-016-03, /03L-0 on 790406:diesel Generator Output Breaker Has Potential to Lockout Open.Caused by Failure of Contact on Shutdown Sequencer to Operate.Sequencer Repaired | /03L-0 on 790406:diesel Generator Output Breaker Has Potential to Lockout Open.Caused by Failure of Contact on Shutdown Sequencer to Operate.Sequencer Repaired | |
| 05000255/LER-1979-017, Forwards LER 79-017/03L-0 | Forwards LER 79-017/03L-0 | |
| 05000255/LER-1979-017-03, /03L-0 on 790404:while Taking Battery Voltage Readings,Two Cells in Station Battery 2 Burst Due to Explosion of Hydrogen Inside Cells.Battery Taken Out of Svc. Two Replacement Cells Ordered | /03L-0 on 790404:while Taking Battery Voltage Readings,Two Cells in Station Battery 2 Burst Due to Explosion of Hydrogen Inside Cells.Battery Taken Out of Svc. Two Replacement Cells Ordered | |
| 05000255/LER-1979-018, Forwards LER 79-018/03L-0 | Forwards LER 79-018/03L-0 | |
| 05000255/LER-1979-018-03, /03L-0 on 790409:reactor Made Critical W/O Conducting Flow Test of Lines.Caused by Misinterpretation of Tech Specs.Personnel Instructed to Exercise Care When Reviewing Operability Requirements | /03L-0 on 790409:reactor Made Critical W/O Conducting Flow Test of Lines.Caused by Misinterpretation of Tech Specs.Personnel Instructed to Exercise Care When Reviewing Operability Requirements | |
| 05000255/LER-1979-019-03, /03L-0 on 790331:sump Drained to Auxiliary Bldg Floor Drains Through Test Connection Located Between Containment Bldg Isolation Valves.Caused by Communication Failure.Corrective Action Still Being Evaluated | /03L-0 on 790331:sump Drained to Auxiliary Bldg Floor Drains Through Test Connection Located Between Containment Bldg Isolation Valves.Caused by Communication Failure.Corrective Action Still Being Evaluated | |
| 05000255/LER-1979-019, Forwards LER 79-019/03L-0 | Forwards LER 79-019/03L-0 | |
| 05000255/LER-1979-020-01, /01T-0 on 790501:restraints for Piping Between Power Conversion Sys Safety Injection Tanks B & D Not Adequate.Caused by Program Error Used by Consultant to Determine Hanger Placement | /01T-0 on 790501:restraints for Piping Between Power Conversion Sys Safety Injection Tanks B & D Not Adequate.Caused by Program Error Used by Consultant to Determine Hanger Placement | |
| 05000255/LER-1979-020, Forwards LER 79-020/01T-0 | Forwards LER 79-020/01T-0 | |
| 05000255/LER-1979-021-03, /03L-0 on 790427:during Routine Surveillance of safety-related snubbers,S-44 (LPIS Pump Discharge) Had No Visible Oil Level.Oil Leakage from Snubber Caused by Failed O-ring,attributed to Ald Age.Ring Replaced | /03L-0 on 790427:during Routine Surveillance of safety-related snubbers,S-44 (LPIS Pump Discharge) Had No Visible Oil Level.Oil Leakage from Snubber Caused by Failed O-ring,attributed to Ald Age.Ring Replaced | |
| 05000255/LER-1979-022-03, /03L-0 on 790426:during Routine Surveillance of safety-related snubber,S-9 (Main Steam Line) Had No Visible Oil Level.Oil Leakage from Snubber Caused by Failed O-ring,attributed to Old Age.Ring Replaced | /03L-0 on 790426:during Routine Surveillance of safety-related snubber,S-9 (Main Steam Line) Had No Visible Oil Level.Oil Leakage from Snubber Caused by Failed O-ring,attributed to Old Age.Ring Replaced | |
| 05000255/LER-1979-023, Forwards LER 79-023/03L-0 | Forwards LER 79-023/03L-0 | |
| 05000255/LER-1979-023-03, /03L-0 on 790518:leak in Regenerative Heat Exchanger (E-56) Shell Side Vent Line Resulted in Degradation of Chemical & Vol Control Sys.Caused by High Porosity in Weld.Weld Ground Out & Repaired | /03L-0 on 790518:leak in Regenerative Heat Exchanger (E-56) Shell Side Vent Line Resulted in Degradation of Chemical & Vol Control Sys.Caused by High Porosity in Weld.Weld Ground Out & Repaired | |
| 05000255/LER-1979-024-03, /03L-0 on 790608:level in Safety Injection Tank Fell Below Tech Spec Limit.Caused by Annunciation of Independent Level Switch.Switch Adjusted | /03L-0 on 790608:level in Safety Injection Tank Fell Below Tech Spec Limit.Caused by Annunciation of Independent Level Switch.Switch Adjusted | |
| 05000255/LER-1979-024, Forwards LER 79-024/03L-0 | Forwards LER 79-024/03L-0 | |
| 05000255/LER-1979-025-01, /01X-1 on 790619:heat Transfer Coefficients of Component Cooling Water Heat Exchanger Were Less than Required.Caused by Fouled Tube Sides.Tubes Will Be Cleaned More Frequently | /01X-1 on 790619:heat Transfer Coefficients of Component Cooling Water Heat Exchanger Were Less than Required.Caused by Fouled Tube Sides.Tubes Will Be Cleaned More Frequently | |
| 05000255/LER-1979-025, Forwards LER 79-025/01T-0 | Forwards LER 79-025/01T-0 | |
| 05000255/LER-1979-026-03, /03L-0 on 790604:steam Generator Chemistry Ph Dropped Below Tech Spec Min When Condensate Polishers Placed in Svc.Caused by Resin Leakage from Polishers Due to Defective Septums.Resin Mixture Changed;Chemical Feed Ended | /03L-0 on 790604:steam Generator Chemistry Ph Dropped Below Tech Spec Min When Condensate Polishers Placed in Svc.Caused by Resin Leakage from Polishers Due to Defective Septums.Resin Mixture Changed;Chemical Feed Ended | |
| 05000255/LER-1979-026, Forwards LER 79-026/03L-0 | Forwards LER 79-026/03L-0 | |
| 05000255/LER-1979-027-03, /03L-0 on 790614:during Normal Power Operation, Conductivity of B Steam Generator Increased to 7.65 Micro/Mhos Per Cm Beyond Tech Spec Limit.Caused by Condenser in Leakage | /03L-0 on 790614:during Normal Power Operation, Conductivity of B Steam Generator Increased to 7.65 Micro/Mhos Per Cm Beyond Tech Spec Limit.Caused by Condenser in Leakage | |
| 05000255/LER-1979-027, Forwards LER 79-027/03L-0 | Forwards LER 79-027/03L-0 | |
| 05000255/LER-1979-028-03, /03L-0 on 790623:conductivity & Sodium Concentration in Steam Generator a Exceeded Tech Spec Limits.Caused by Combination of Condenser Tube in Leakage & Chemical Hideout Return as Result of Power Reduction | /03L-0 on 790623:conductivity & Sodium Concentration in Steam Generator a Exceeded Tech Spec Limits.Caused by Combination of Condenser Tube in Leakage & Chemical Hideout Return as Result of Power Reduction | |
| 05000255/LER-1979-028, Forwards LER 79-028/03L-0 | Forwards LER 79-028/03L-0 | |
