| | | Reporting criterion |
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| 05000348/LER-1979-001-03, /03L-0 on 790109:electronic Switching Sys B1G Sequencer Failed to Meet Time Requirements for Picking Up Step 2.Caused by Agastat Timer Setpoint Drift | /03L-0 on 790109:electronic Switching Sys B1G Sequencer Failed to Meet Time Requirements for Picking Up Step 2.Caused by Agastat Timer Setpoint Drift | |
| 05000348/LER-1979-001, Forwards LER 79-001/03L-0 | Forwards LER 79-001/03L-0 | |
| 05000348/LER-1979-002-03, /03L-0 on 790116:120V Vital AC Bus 1B Was Deenergized When Inverter 1B Tripped Due to Components Failure.Capacitor,Air Core Choke,Resistor & Fuse Were Replaced & Inverter Returned to Svc | /03L-0 on 790116:120V Vital AC Bus 1B Was Deenergized When Inverter 1B Tripped Due to Components Failure.Capacitor,Air Core Choke,Resistor & Fuse Were Replaced & Inverter Returned to Svc | |
| 05000348/LER-1979-003-03, /03L-0 on 790116:following Reactor Trip,Turbine Driven Auxiliary Feedwater Pump Failed to Start.Caused by Trip/Throttle Valve Which Tripped Shut | /03L-0 on 790116:following Reactor Trip,Turbine Driven Auxiliary Feedwater Pump Failed to Start.Caused by Trip/Throttle Valve Which Tripped Shut | |
| 05000348/LER-1979-004-03, /03L-0 on 790123:containment Atmosphere Particulate Radioactivity Monitoring Sys Inoperable;Filter Paper Was Not Advancing.Caused by Replacement Paper Being Thicker That That Originally Supplied | /03L-0 on 790123:containment Atmosphere Particulate Radioactivity Monitoring Sys Inoperable;Filter Paper Was Not Advancing.Caused by Replacement Paper Being Thicker That That Originally Supplied | |
| 05000348/LER-1979-005, /03L-0 on 790123:during Maint on Boron Injection Tank Inlet Valve Q1E21VO16B,boron Concentration Fell Below Tech Spec Requirements.Caused by Leakage Through Opened Valve During Troubleshooting Per LER 79-005/03L-0 | /03L-0 on 790123:during Maint on Boron Injection Tank Inlet Valve Q1E21VO16B,boron Concentration Fell Below Tech Spec Requirements.Caused by Leakage Through Opened Valve During Troubleshooting Per LER 79-005/03L-0 | |
| 05000348/LER-1979-005-03, /03L-0 on 790123:during Surveillance Test on Boron Injection Tank Inlet Valve Q1E32V016B,valve Failed to Operate Electrically.Cause Undetermined,Since Subsequent Troubleshooting Failed to Duplicate Problem | /03L-0 on 790123:during Surveillance Test on Boron Injection Tank Inlet Valve Q1E32V016B,valve Failed to Operate Electrically.Cause Undetermined,Since Subsequent Troubleshooting Failed to Duplicate Problem | |
| 05000348/LER-1979-007-03, /03L-0 on 790212:during Review of Surveillance Test Data,Noted That RCS Leakage Test (FNP-1-STP-9.0) Had Not Been Done within Time Specified.Caused by Personnel Failure.Supervisors Instructed Re Matter | /03L-0 on 790212:during Review of Surveillance Test Data,Noted That RCS Leakage Test (FNP-1-STP-9.0) Had Not Been Done within Time Specified.Caused by Personnel Failure.Supervisors Instructed Re Matter | |
| 05000348/LER-1979-007, Forwards LER 79-007/03L-0,LER 79-008/03L-0,LER 79-009/03L-0, LER 79-010/03L-0, & 79-011/03L-0 | Forwards LER 79-007/03L-0,LER 79-008/03L-0,LER 79-009/03L-0, LER 79-010/03L-0, & 79-011/03L-0 | |
| 05000348/LER-1979-008-03, /03L-0 on 790216:during Review of Surveillance Test FNP-1-STP-15.0,containment Main Personnel & Emergency Air Leak Outer Doors Failed to Meet Acceptance Criteria. Leakage Probably Caused by Dirty Door Seals &/Or Seal Set | /03L-0 on 790216:during Review of Surveillance Test FNP-1-STP-15.0,containment Main Personnel & Emergency Air Leak Outer Doors Failed to Meet Acceptance Criteria. Leakage Probably Caused by Dirty Door Seals &/Or Seal Set | |
| 05000348/LER-1979-009-03, /03L-0 on 790216:during Plant Startup W/Reactor & Steam Generator Controls Manual & Steam Dumps in Automatic, Steam Dumps Occurred.Temp Average Reduced to 538 F.Personnel Reinstructed | /03L-0 on 790216:during Plant Startup W/Reactor & Steam Generator Controls Manual & Steam Dumps in Automatic, Steam Dumps Occurred.Temp Average Reduced to 538 F.Personnel Reinstructed | |
| 05000348/LER-1979-010-03, /03L-0 on 790218:while Doing FNP-1-STP-215.1B, Steam Flow/Feed Flow Bistable (FB478A)failed to Meet Table 2-1 Trip Setpoint Valve.Caused by Bistable Setpoint Drift Below That Specified in Surveillance Test.Bistable Adjusted | /03L-0 on 790218:while Doing FNP-1-STP-215.1B, Steam Flow/Feed Flow Bistable (FB478A)failed to Meet Table 2-1 Trip Setpoint Valve.Caused by Bistable Setpoint Drift Below That Specified in Surveillance Test.Bistable Adjusted | |
| 05000348/LER-1979-011-03, /03L-0 on 790221:while Doing FNP-1-STP-28.7,LOSP B1F Sequencer Failed to Meet Time Requirement for Picking Up Step 6.Caused by Agastat Timer Setpoint Drift.Agastat Timer Adjusted & Satisfactorily Retested | /03L-0 on 790221:while Doing FNP-1-STP-28.7,LOSP B1F Sequencer Failed to Meet Time Requirement for Picking Up Step 6.Caused by Agastat Timer Setpoint Drift.Agastat Timer Adjusted & Satisfactorily Retested | |
| 05000348/LER-1979-012-03, /03L-0 on 790214:review of Solid State Protective Sys Train A/B Operability Test Indicated That Portion of Program Did Not Verify Spray Test Actuation Logic.Caused by Sys Train Design Change.Procedure Modified | /03L-0 on 790214:review of Solid State Protective Sys Train A/B Operability Test Indicated That Portion of Program Did Not Verify Spray Test Actuation Logic.Caused by Sys Train Design Change.Procedure Modified | |
| 05000348/LER-1979-012, Forwards LER 79-012/03L-0 | Forwards LER 79-012/03L-0 | |
| 05000348/LER-1979-013, Forwards LER 79-013/03L-0 | Forwards LER 79-013/03L-0 | |
| 05000348/LER-1979-013-03, /03L-0 on 790227:B1F Sequencer Found in Test Mode, Rendering 1-2A Diesel Generator Inoperable.Caused by Faulty Switch Mechanism.Sequencer Repaired | /03L-0 on 790227:B1F Sequencer Found in Test Mode, Rendering 1-2A Diesel Generator Inoperable.Caused by Faulty Switch Mechanism.Sequencer Repaired | |
| 05000348/LER-1979-015-01, /01T-0 on 790327:during Inservice Insp,Linear Svc Indications Found on ECCS Line to Loops 1 & 2 Cold Legs & Loop 3 Hot Leg.Caused During Handling.Two Corrective Actions Proposed:Cut Out & Replace or Grind Out | /01T-0 on 790327:during Inservice Insp,Linear Svc Indications Found on ECCS Line to Loops 1 & 2 Cold Legs & Loop 3 Hot Leg.Caused During Handling.Two Corrective Actions Proposed:Cut Out & Replace or Grind Out | |
| 05000348/LER-1979-016-03, /03L-0 on 790325:loss of Sys Pressure B1F Sequencer Failed to Meet Time Requirements in Test.Agastat Timer Setpoint Drifted Below Setpoint Required for Test. Timer Adjusted;Test Redone | /03L-0 on 790325:loss of Sys Pressure B1F Sequencer Failed to Meet Time Requirements in Test.Agastat Timer Setpoint Drifted Below Setpoint Required for Test. Timer Adjusted;Test Redone | |
| 05000348/LER-1979-017-01, /01T-2 on 790330:util Notified by Westinghouse of Single Dropped Rod W/Potential for Calculated DNB Ratios Lower than Reported to NRC for Floating Nuclear Plants. Caused by Incorrect Measurement During Rod Drop Events | /01T-2 on 790330:util Notified by Westinghouse of Single Dropped Rod W/Potential for Calculated DNB Ratios Lower than Reported to NRC for Floating Nuclear Plants. Caused by Incorrect Measurement During Rod Drop Events | |
| 05000348/LER-1979-017, Forwards LER 79-017/01T-2 | Forwards LER 79-017/01T-2 | |
| 05000348/LER-1979-019, Forwards LER 79-019/03L-1 | Forwards LER 79-019/03L-1 | |
| 05000348/LER-1979-019-03, /03L-1 on 790420:fluoride & Chloride Concentrations in RCS in Violation of Tech Spec Limits.Cause Not Determined.Rcs Integrity Not Impaired & Acceptable for Continued Operation | /03L-1 on 790420:fluoride & Chloride Concentrations in RCS in Violation of Tech Spec Limits.Cause Not Determined.Rcs Integrity Not Impaired & Acceptable for Continued Operation | |
| 05000348/LER-1979-021-01, /01T-3 on 790412:statistical Sampling of Seismic Category I Anchor Bolts Would Not Provide Probability Greater than 95% Reliability.Caused Under Investigation. Testing Extended to 100% Verification of Anchors on Pipe | /01T-3 on 790412:statistical Sampling of Seismic Category I Anchor Bolts Would Not Provide Probability Greater than 95% Reliability.Caused Under Investigation. Testing Extended to 100% Verification of Anchors on Pipe | |
| 05000348/LER-1979-021, Forwards LER 79-021/01T-3 | Forwards LER 79-021/01T-3 | |
| 05000348/LER-1979-022-03, /03L-0 on 790620:surveillance Test Procedure FNP-1-STP-29.2 Not Performed on 790620.Caused by Inadequate Surveillance Test Schedule Review by Shift Foreman on 790620.Importance of Accurate Daily Review Stressed | /03L-0 on 790620:surveillance Test Procedure FNP-1-STP-29.2 Not Performed on 790620.Caused by Inadequate Surveillance Test Schedule Review by Shift Foreman on 790620.Importance of Accurate Daily Review Stressed | |
| 05000348/LER-1979-023-01, /01T-0 on 790622:notified by Westinghouse That High Energy Line Break Inside Containment Could Cause Heatup of Steam Generator Level Transmitter Ref Legs. LER Will Be Issued Upon Completion of Investigation | /01T-0 on 790622:notified by Westinghouse That High Energy Line Break Inside Containment Could Cause Heatup of Steam Generator Level Transmitter Ref Legs. LER Will Be Issued Upon Completion of Investigation | |
| 05000348/LER-1979-023, Forwards LER 79-023/01T-0 | Forwards LER 79-023/01T-0 | |
| 05000348/LER-1979-024-03, /03L-0 on 790622:during Review of Surveillance Tests FNP-1-STP-40.1 & 40.2,noted That Certain Components Were Not Included in Test Procedures.Caused by Procedural Deficiencies.Procedure Change Has Been Made | /03L-0 on 790622:during Review of Surveillance Tests FNP-1-STP-40.1 & 40.2,noted That Certain Components Were Not Included in Test Procedures.Caused by Procedural Deficiencies.Procedure Change Has Been Made | |
| 05000348/LER-1979-025-03, /03L-0 on 790623:during Surveillance Test FNP-1-STP-256.11 Both Source Range Channels Inadvertently Were Deenergized. Caused by Procedure Deficiency. Power Restored & Procedure Changed | /03L-0 on 790623:during Surveillance Test FNP-1-STP-256.11 Both Source Range Channels Inadvertently Were Deenergized. Caused by Procedure Deficiency. Power Restored & Procedure Changed | |
| 05000348/LER-1979-026-03, /03L-0 on 790716:total of 135 Hydraulic Snubbers Did Not Meet Surveillance Test Requirements.Caused by Loss of Oil Due to Seal Leakage & Failure to Meet Lockup & Bleed Acceptance Criteria.Snubbers Repaired & Tested | /03L-0 on 790716:total of 135 Hydraulic Snubbers Did Not Meet Surveillance Test Requirements.Caused by Loss of Oil Due to Seal Leakage & Failure to Meet Lockup & Bleed Acceptance Criteria.Snubbers Repaired & Tested | |
| 05000348/LER-1979-027-03, /03L-0 on 790607:radiation Monitor Declared Inoperable.Caused by Pump Malfunction.Pump Repaired & Declared Operable 790615 | /03L-0 on 790607:radiation Monitor Declared Inoperable.Caused by Pump Malfunction.Pump Repaired & Declared Operable 790615 | |
| 05000348/LER-1979-028-03, /03L-0 on 790627:radiation Monitor R-5 Declared Inoperable Due to Loss of Power.Feedbreaker Found Open. Cause Unknown.Breaker Closed & R-5 Declared Operable | /03L-0 on 790627:radiation Monitor R-5 Declared Inoperable Due to Loss of Power.Feedbreaker Found Open. Cause Unknown.Breaker Closed & R-5 Declared Operable | |
| 05000348/LER-1979-029-03, /03L-0 on 790713:penetration Room Filtration Sys Trains a & B Inoperable.Caused by Train B Exhaust Fan Not Starting & Train a Suction Damper Not Opening.Overload Reset & Fuse Replaced | /03L-0 on 790713:penetration Room Filtration Sys Trains a & B Inoperable.Caused by Train B Exhaust Fan Not Starting & Train a Suction Damper Not Opening.Overload Reset & Fuse Replaced | |
| 05000348/LER-1979-029, Forwards LER 79-029/03L-0 | Forwards LER 79-029/03L-0 | |
| 05000348/LER-1979-030, Forwards LER 79-030/03L-0 | Forwards LER 79-030/03L-0 | |
| 05000348/LER-1979-030-03, /03L-0 on 790717:during Surveillance test,600 Volt Ctr 1C Supply Breaker EE07 Failed to Load Shed.Caused by Open Links in Local Control Panel.Links Closed & Breaker Verified | /03L-0 on 790717:during Surveillance test,600 Volt Ctr 1C Supply Breaker EE07 Failed to Load Shed.Caused by Open Links in Local Control Panel.Links Closed & Breaker Verified | |
| 05000348/LER-1979-031, Forwards LER 79-031/03L-0 | Forwards LER 79-031/03L-0 | |
| 05000348/LER-1979-031-03, /03L-0 on 790717:two Control Power Fuses Blew in N31 Source Range Drawer & Were Causing Loss of Power in Both Source Range Channels.Caused by Personnel Error | /03L-0 on 790717:two Control Power Fuses Blew in N31 Source Range Drawer & Were Causing Loss of Power in Both Source Range Channels.Caused by Personnel Error | |
| 05000348/LER-1979-032-03, /03L-0:on 790730,determined That Diesel Generators 1C & 2C Output Breakers Were Racked Out.Caused by Personnel Error.Breakers Racked in & Control Power Restored | /03L-0:on 790730,determined That Diesel Generators 1C & 2C Output Breakers Were Racked Out.Caused by Personnel Error.Breakers Racked in & Control Power Restored | |
| 05000348/LER-1979-033-03, /03L-0:on 790803,radiation Monitor R25B Declared Inoperable.Caused by Drive Belt Failure.New Drive Belt Installed | /03L-0:on 790803,radiation Monitor R25B Declared Inoperable.Caused by Drive Belt Failure.New Drive Belt Installed | |
| 05000348/LER-1979-034, Forwards LER 79-034/03L-0 | Forwards LER 79-034/03L-0 | |
| 05000348/LER-1979-034-03, /03L-0:on 790824,determined That Functional Surveillance Test Had Not Been Performed on Certain Seismic Monitoring Instrumentation within Specified Time.Caused by Personnel Error.Proper Procedure re-emphasized | /03L-0:on 790824,determined That Functional Surveillance Test Had Not Been Performed on Certain Seismic Monitoring Instrumentation within Specified Time.Caused by Personnel Error.Proper Procedure re-emphasized | |
| 05000348/LER-1979-035, Forwards LER 79-035/01T-0 | Forwards LER 79-035/01T-0 | |
| 05000348/LER-1979-035-01, /01T-0:on 790824,Westinghouse Notified Util of Potential Heat Sink Shorting to 7300 Rack Card Guides within 7300 Process Instrumentation & Control Printed Card Circuits.Caused by Mfg Defect.Cards Replaced | /01T-0:on 790824,Westinghouse Notified Util of Potential Heat Sink Shorting to 7300 Rack Card Guides within 7300 Process Instrumentation & Control Printed Card Circuits.Caused by Mfg Defect.Cards Replaced | |
| 05000348/LER-1979-036-03, /03L-0:on 790903,train B RHR Relief Isolation Valves Closed When Power Was Applied to Actuators to Enable Valve Position Indication.Caused by Pulled Fuses That Forced Output Circuit to Send Signal to Close Valves | /03L-0:on 790903,train B RHR Relief Isolation Valves Closed When Power Was Applied to Actuators to Enable Valve Position Indication.Caused by Pulled Fuses That Forced Output Circuit to Send Signal to Close Valves | |
| 05000348/LER-1979-037-03, /03L-0:on 790906,auxiliary Bldg Battery Verification Was Two Days Late.Caused by Personnel Error. Performance of Surveillance Tests on Scheduled Dates Will Be Discussed W/Affected Personnel | /03L-0:on 790906,auxiliary Bldg Battery Verification Was Two Days Late.Caused by Personnel Error. Performance of Surveillance Tests on Scheduled Dates Will Be Discussed W/Affected Personnel | |
| 05000348/LER-1979-038-03, /03L-0:on 790912,while Performing Surveillance Test FNP-1-STP-1.0,containment Gaseous Activity Purge & Exhaust Isolation Monitor Declared Inoperable.Caused by Monitor Bypass Valve Being in Open Position | /03L-0:on 790912,while Performing Surveillance Test FNP-1-STP-1.0,containment Gaseous Activity Purge & Exhaust Isolation Monitor Declared Inoperable.Caused by Monitor Bypass Valve Being in Open Position | |
| 05000348/LER-1979-039-03, /03L-0:on 790924,fuel Storage Pool Area Radiation Monitor Declared Inoperable Due to Reading Discrepancy. Caused by Instrument Drift.Monitor Recalibr & Returned to Svc on 790930 | /03L-0:on 790924,fuel Storage Pool Area Radiation Monitor Declared Inoperable Due to Reading Discrepancy. Caused by Instrument Drift.Monitor Recalibr & Returned to Svc on 790930 | |
| 05000348/LER-1979-040-01, /01T-0:on 791011,wrong Valves Installed in Piping Sys.Caused by Deficiency in Original Plant Design Equipment Specs.Valves Being Replaced | /01T-0:on 791011,wrong Valves Installed in Piping Sys.Caused by Deficiency in Original Plant Design Equipment Specs.Valves Being Replaced | |
