| | | Reporting criterion |
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| 05000309/LER-1979-002, Forwards LER 79-002/03L-0 | Forwards LER 79-002/03L-0 | |
| 05000309/LER-1979-002-03, /03L-0 on 790226:during Test of Reactor Protection Sys,Set of Relay Contacts on Reactor Trip Matrix Relays Did Not Open Reliably Upon Deenergization of Relay.Cause Undetermined.Faulty Contacts Replaced | /03L-0 on 790226:during Test of Reactor Protection Sys,Set of Relay Contacts on Reactor Trip Matrix Relays Did Not Open Reliably Upon Deenergization of Relay.Cause Undetermined.Faulty Contacts Replaced | |
| 05000309/LER-1979-003, Forwards LER 79-003/03L-0 | Forwards LER 79-003/03L-0 | |
| 05000309/LER-1979-003-03, /03L-0 on 790227:Channel a Sigma Meter Relay Setpoint Drifted Approx 1 Psig Below Required Actuation Setpoint.Caused by Instrument Drift.Setpoint Has Been Changed | /03L-0 on 790227:Channel a Sigma Meter Relay Setpoint Drifted Approx 1 Psig Below Required Actuation Setpoint.Caused by Instrument Drift.Setpoint Has Been Changed | |
| 05000309/LER-1979-004, Forwards LER 79-004/03L-0 | Forwards LER 79-004/03L-0 | |
| 05000309/LER-1979-004-03, /03L-0 on 790223:Channel C Mcb Indication for Incore Tilt & Positive & Negative Sotc Limits Were Reading More Negative than Other Channels.Caused by Failed +18 Volts DC Power Supply.Unit Replaced | /03L-0 on 790223:Channel C Mcb Indication for Incore Tilt & Positive & Negative Sotc Limits Were Reading More Negative than Other Channels.Caused by Failed +18 Volts DC Power Supply.Unit Replaced | |
| 05000309/LER-1979-005, Forwards LER 79-005/01X-0 | Forwards LER 79-005/01X-0 | |
| 05000309/LER-1979-005-01, /01X-0 on 790313:order to Show Cause Issued Due to Potential Piping Deficiencies in safety-related Sys. Since Plant Is Now in Cold Shutdown,Deficiencies No Longer Present Safety Concern | /01X-0 on 790313:order to Show Cause Issued Due to Potential Piping Deficiencies in safety-related Sys. Since Plant Is Now in Cold Shutdown,Deficiencies No Longer Present Safety Concern | |
| 05000309/LER-1979-008, Forwards LER 79-008/03L-0 | Forwards LER 79-008/03L-0 | |
| 05000309/LER-1979-008-03, /03L-0 on 790315:body-to-bonnet Gasket Failed During Establishment of Shutdown Cooling Resulting in Gaseous Release Via Primary Vent Stack.Caused by Large Vol of Primary Coolant Released to Spray Bldg | /03L-0 on 790315:body-to-bonnet Gasket Failed During Establishment of Shutdown Cooling Resulting in Gaseous Release Via Primary Vent Stack.Caused by Large Vol of Primary Coolant Released to Spray Bldg | |
| 05000309/LER-1979-010, /03X-1 on 790315:corrects Statement Contained in LER 79-010/03L-0.Contrary to Statement,Release Did Occur & Was Reported in LERs 79-008/03L-0 & 79-009/03T-0 | /03X-1 on 790315:corrects Statement Contained in LER 79-010/03L-0.Contrary to Statement,Release Did Occur & Was Reported in LERs 79-008/03L-0 & 79-009/03T-0 | |
| 05000309/LER-1979-012-01, /01T-0 on 790524:reactor Protection Sys Low Pressure Trip Bistables in Error Set at 415 Psig.Caused by Incorrectly Transposing Data Transmitter Calibr Sheets to Procedure.Calibr Sheets & Procedures Being Revised | /01T-0 on 790524:reactor Protection Sys Low Pressure Trip Bistables in Error Set at 415 Psig.Caused by Incorrectly Transposing Data Transmitter Calibr Sheets to Procedure.Calibr Sheets & Procedures Being Revised | |
| 05000309/LER-1979-012, Forwards LER 79-012/01T-0 | Forwards LER 79-012/01T-0 | |
| 05000309/LER-1979-013-03, /03L-0 on 790526:reactor Protecction Sys Channel D Low Flow Trip Bistabale Actuated at 24% Out of Spec in Nonconservative Direction.Caused by Defective Bistable.Spare Unit Installed & Calibr | /03L-0 on 790526:reactor Protecction Sys Channel D Low Flow Trip Bistabale Actuated at 24% Out of Spec in Nonconservative Direction.Caused by Defective Bistable.Spare Unit Installed & Calibr | |
| 05000309/LER-1979-013, Forwards LER 79-013/03L-0 | Forwards LER 79-013/03L-0 | |
| 05000309/LER-1979-014, Forwards LER 79-014/03L-0 | Forwards LER 79-014/03L-0 | |
| 05000309/LER-1979-014-03, /03L-0 on 790607:remote Operating Linkage for B Train Spray Header Manual Isolation Valve Found Disconnected,W/Valve Not Fully Open.Caused by Loose Linkage Set Screws.Valve Lineup Check Sheet Modified | /03L-0 on 790607:remote Operating Linkage for B Train Spray Header Manual Isolation Valve Found Disconnected,W/Valve Not Fully Open.Caused by Loose Linkage Set Screws.Valve Lineup Check Sheet Modified | |
| 05000309/LER-1979-015-03, /03L-0 on 790712:during Operation,Rps Channel a Hi Power Matrix Trip Lights Illuminated But pre-trip & Trip Lights Did Not.Caused by Failed 15 Volt Dc Power Supply.Unit Replaced in Kind & Returned for Analysis | /03L-0 on 790712:during Operation,Rps Channel a Hi Power Matrix Trip Lights Illuminated But pre-trip & Trip Lights Did Not.Caused by Failed 15 Volt Dc Power Supply.Unit Replaced in Kind & Returned for Analysis | |
| 05000309/LER-1979-015, Forwards LER 79-015/03L-0 | Forwards LER 79-015/03L-0 | |
| 05000309/LER-1979-016-03, /03L-0 on 790722:during Routine Steady State Operations,Spurious Trip Occurred on Reactor Protection Sys Channel D Tm/Lp Circuit.Cause Not Determined on Site. Returned to Mfg | /03L-0 on 790722:during Routine Steady State Operations,Spurious Trip Occurred on Reactor Protection Sys Channel D Tm/Lp Circuit.Cause Not Determined on Site. Returned to Mfg | |
| 05000309/LER-1979-016, Forwards LER 79-016/03L-0 | Forwards LER 79-016/03L-0 | |
| 05000309/LER-1979-017, Forwards LER 79-017/99X-0 | Forwards LER 79-017/99X-0 | |
| 05000309/LER-1979-017-99, /99X-0:on 790901,during Routine Shutdown for Maint Outage,Reactor Coolant Dose Equivalent Iodine Exceeded Tech Spec Limit.Caused by Minor Fuel Cladding Degradation. Monitoring Program Established | /99X-0:on 790901,during Routine Shutdown for Maint Outage,Reactor Coolant Dose Equivalent Iodine Exceeded Tech Spec Limit.Caused by Minor Fuel Cladding Degradation. Monitoring Program Established | |
| 05000309/LER-1979-018, Forwards LER 79-018/01T-0 | Forwards LER 79-018/01T-0 | |
| 05000309/LER-1979-018-01, /01T-0:on 790925,following Scheduled Maint Outage,Rhr Sys Was Secured W/O Steam Generator Being Operable Per Tech Specs.Caused by Failure of Operator to Notice Incorrect Water Level.Proper Procedures Reviewed | /01T-0:on 790925,following Scheduled Maint Outage,Rhr Sys Was Secured W/O Steam Generator Being Operable Per Tech Specs.Caused by Failure of Operator to Notice Incorrect Water Level.Proper Procedures Reviewed | |
| 05000309/LER-1979-019-03, /03L-0:on 790925,one Outstanding Procedure Change Rept Not Reviewed within 14 Days Per Tech Specs.Caused by Misplacing of Rept.Plant Personnel Notified of Proper Review Process | /03L-0:on 790925,one Outstanding Procedure Change Rept Not Reviewed within 14 Days Per Tech Specs.Caused by Misplacing of Rept.Plant Personnel Notified of Proper Review Process | |
| 05000309/LER-1979-019, Forwards LER 79-019/03L-0 | Forwards LER 79-019/03L-0 | |
| 05000309/LER-1979-020, Forwards LER 79-020/03L-0 | Forwards LER 79-020/03L-0 | |
| 05000309/LER-1979-020-03, /03L-0:on 790910,routine Review for Discharges Made 790910-16 Indicated Waste Liquid Radiation Monitor Did Not Respond as Expected for Releases.Caused by Waste Liquid Radiation Monitor Being Out of Calibr | /03L-0:on 790910,routine Review for Discharges Made 790910-16 Indicated Waste Liquid Radiation Monitor Did Not Respond as Expected for Releases.Caused by Waste Liquid Radiation Monitor Being Out of Calibr | |
| 05000309/LER-1979-021-03, /03L-0:on 790918,during Cold Shutdown Test of Containment Spray Pump,Operator Observed Decrease in Pump Amps & Discharge Pressure.Caused by Personnel Error.Spare Pump Placed in Svc & Appropriate Personnel Reprimanded | /03L-0:on 790918,during Cold Shutdown Test of Containment Spray Pump,Operator Observed Decrease in Pump Amps & Discharge Pressure.Caused by Personnel Error.Spare Pump Placed in Svc & Appropriate Personnel Reprimanded | |
| 05000309/LER-1979-021, Forwards LER 79-021/03L-0 | Forwards LER 79-021/03L-0 | |
| 05000309/LER-1979-022-03, /03L-0:on 790928,relay Contacts on Reactor Trip Matrix Relays Not Opening Upon de-energization.Cause Unknown.Wetted Relay Module HG2X-1011 Replaced.Replacement of All mercury-wetted Relays Under Consideration | /03L-0:on 790928,relay Contacts on Reactor Trip Matrix Relays Not Opening Upon de-energization.Cause Unknown.Wetted Relay Module HG2X-1011 Replaced.Replacement of All mercury-wetted Relays Under Consideration | |
| 05000309/LER-1979-022, Forwards LER 79-022/03L-0 | Forwards LER 79-022/03L-0 | |
| 05000309/LER-1979-023-03, /03L-0:on 791003,while Testing Train Containment Spray Pump A,During Safeguards Pump Testing,Pump Failed to Start & Breaker Auto Trip Annunciated.Caused by Failure of Contact Block on Circuit Breaker to Make Up Properly | /03L-0:on 791003,while Testing Train Containment Spray Pump A,During Safeguards Pump Testing,Pump Failed to Start & Breaker Auto Trip Annunciated.Caused by Failure of Contact Block on Circuit Breaker to Make Up Properly | |
| 05000309/LER-1979-023, Forwards LER 79-023/03L-0 | Forwards LER 79-023/03L-0 | |
| 05000309/LER-1979-024-99, /99X-0:on 791017,reactor Coolant Dose Equivalent Iodine Exceeded Tech Spec Limits of 1.0 Uci/G.Caused by Unscheduled Plant Trip.Monitoring Program Established Following Trip to Adhere to Iodine Trends | /99X-0:on 791017,reactor Coolant Dose Equivalent Iodine Exceeded Tech Spec Limits of 1.0 Uci/G.Caused by Unscheduled Plant Trip.Monitoring Program Established Following Trip to Adhere to Iodine Trends | |
| 05000309/LER-1979-024, Forwards LER 79-024/99X-0 | Forwards LER 79-024/99X-0 | |
| 05000309/LER-1979-025, Forwards LER 79-025/03L-0 | Forwards LER 79-025/03L-0 | |
| 05000309/LER-1979-025-03, /03L-0:on 791005,svc Water Pump B Failed to Start & Pump Breaker Tripped.Breaker Reset & Second Attempt to Start Pump Succeeded.Event Could Not Be Duplicated.Cause Could Not Be Determined.Personnel Alerted for Repetition | /03L-0:on 791005,svc Water Pump B Failed to Start & Pump Breaker Tripped.Breaker Reset & Second Attempt to Start Pump Succeeded.Event Could Not Be Duplicated.Cause Could Not Be Determined.Personnel Alerted for Repetition | |
| 05000309/LER-1979-026, Forwards Updated LER 79-026/03X-1 | Forwards Updated LER 79-026/03X-1 | |
| 05000309/LER-1979-026-03, During Emergency Diesel Generator Test,Diesel Generator Turbocharger Failed.Fire Started within Engine Exhaust Sys & Engine Shut Down.Caused by Thrust Bearing Failure.Bearing Replaced | During Emergency Diesel Generator Test,Diesel Generator Turbocharger Failed.Fire Started within Engine Exhaust Sys & Engine Shut Down.Caused by Thrust Bearing Failure.Bearing Replaced | |
| 05000309/LER-1979-027, Forwards LER 79-027/03L-0 | Forwards LER 79-027/03L-0 | |
| 05000309/LER-1979-027-03, /03L-0:on 791029,leakage Near Safety Injection Tank Discharge Check Valve 1 Exceeded Tech Spec Limits. Caused by O-ring Failure on Bearing Cap of Swing Check valve.O-ring Replaced & Bearing Cap Seal Welded | /03L-0:on 791029,leakage Near Safety Injection Tank Discharge Check Valve 1 Exceeded Tech Spec Limits. Caused by O-ring Failure on Bearing Cap of Swing Check valve.O-ring Replaced & Bearing Cap Seal Welded | |
| 05000309/LER-1979-028, Forwards LER 79-028/03L-0 | Forwards LER 79-028/03L-0 | |
| 05000309/LER-1979-028-03, /03L-0:on 791031,one Set of Relay Contacts on Each of Three Separate Reactor Trip Matrix Relays Were Not Opening Reliably.Cause Not Stated.Three CP Clare,Mercury Wetted Relay Modules,Type HG2X-1011,replaced | /03L-0:on 791031,one Set of Relay Contacts on Each of Three Separate Reactor Trip Matrix Relays Were Not Opening Reliably.Cause Not Stated.Three CP Clare,Mercury Wetted Relay Modules,Type HG2X-1011,replaced | |
| 05000309/LER-1979-029-99, /99X-0:on 791025,during Routine Shutdown Operations for Repair of Leaking Valve,Reactor Coolant Dose Equivalent Iodine Exceeded Tech Specs.Caused by Minor Fuel Cladding Degradation | /99X-0:on 791025,during Routine Shutdown Operations for Repair of Leaking Valve,Reactor Coolant Dose Equivalent Iodine Exceeded Tech Specs.Caused by Minor Fuel Cladding Degradation | |
| 05000309/LER-1979-029, Forwards LER 79-029/99X-0 | Forwards LER 79-029/99X-0 | |
| 05000309/LER-1979-030, Forwards LER 79-030/99X-0 | Forwards LER 79-030/99X-0 | |
| 05000309/LER-1979-030-99, /99X-0:on 791105,reactor Coolant Dose Equivalent Iodine Exceeded Tech Spec Limit.Caused by Unscheduled Plant Trip.Monitoring Program Established to Follow Iodine Trends | /99X-0:on 791105,reactor Coolant Dose Equivalent Iodine Exceeded Tech Spec Limit.Caused by Unscheduled Plant Trip.Monitoring Program Established to Follow Iodine Trends | |
| 05000309/LER-1979-031-03, /03L-0:on 791227,during Special Test of Reactor Protection Sys,One Set of Relay Contacts on Each of Two Trip Matrix Relays Found Not Operating Reliably Upon de-energization of Relay.Caused Not Stated | /03L-0:on 791227,during Special Test of Reactor Protection Sys,One Set of Relay Contacts on Each of Two Trip Matrix Relays Found Not Operating Reliably Upon de-energization of Relay.Caused Not Stated | |