| | | Reporting criterion |
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| 05000271/LER-1979-001-03, /03L-0 on 790110:during Normal Operation & Routine Maint,Leak Was Noted Adjacent to Flange on Reactor Water Cleanup Sys Suction Piping.Cause Unknown | /03L-0 on 790110:during Normal Operation & Routine Maint,Leak Was Noted Adjacent to Flange on Reactor Water Cleanup Sys Suction Piping.Cause Unknown | |
| 05000271/LER-1979-001, Forwards LER 79-001/03L-0 | Forwards LER 79-001/03L-0 | |
| 05000271/LER-1979-002, Forwards LER 79-002/01P-0 | Forwards LER 79-002/01P-0 | |
| 05000271/LER-1979-002-01, /01P-0 on 780111:flow Disturbance Occurred in Sampling Sys to the Extent That Radiation Monitors Were Inoperable.Caused by Possible Flow Blockage in Sample Sys Component.Corrective Action Rept Will Follow | /01P-0 on 780111:flow Disturbance Occurred in Sampling Sys to the Extent That Radiation Monitors Were Inoperable.Caused by Possible Flow Blockage in Sample Sys Component.Corrective Action Rept Will Follow | |
| 05000271/LER-1979-003, Forwards LER 79-003/03L-0 | Forwards LER 79-003/03L-0 | |
| 05000271/LER-1979-003-03, /03L-0 on 790123:main Steam Safety Valve Nitrogen Setpoint of 1220 Psi Found During Surveillance Testing,In Excess of Tech Spec Max.Caused by Setpoint Drift | /03L-0 on 790123:main Steam Safety Valve Nitrogen Setpoint of 1220 Psi Found During Surveillance Testing,In Excess of Tech Spec Max.Caused by Setpoint Drift | |
| 05000271/LER-1979-004, Forwards LER 79-004/03L-0 | Forwards LER 79-004/03L-0 | |
| 05000271/LER-1979-004-03, /03L-0 on 790214:during Routine Calibr of Torus Level Transmitter Lt 16-19-38A,instrument Could Not Be Calibr to Limits Specified.Caused by Buildup of Rust & Crud in Transmitter Capsule Cavity.Transmitter Was Replaced | /03L-0 on 790214:during Routine Calibr of Torus Level Transmitter Lt 16-19-38A,instrument Could Not Be Calibr to Limits Specified.Caused by Buildup of Rust & Crud in Transmitter Capsule Cavity.Transmitter Was Replaced | |
| 05000271/LER-1979-012-03, /03L-0 on 790622:during Weekly Review of Completed Surveillance Data,Discovered That Weekly Functional Test of Main Steam Line Radiation Monitors Was Not Done within Prescribed Intervals.Caused by Oversight | /03L-0 on 790622:during Weekly Review of Completed Surveillance Data,Discovered That Weekly Functional Test of Main Steam Line Radiation Monitors Was Not Done within Prescribed Intervals.Caused by Oversight | |
| 05000271/LER-1979-013, Forwards LER 79-013/03L-0 | Forwards LER 79-013/03L-0 | |
| 05000271/LER-1979-013-03, /03L-0 on 790710:during Testing of RHR Subsys Logic a Relay 10A-K46A Failed to Energize.Caused by Disconnected Lead of Contact to Relay Coils Control Circuit. Wire Was Reconnected & Sys Returned to Operation | /03L-0 on 790710:during Testing of RHR Subsys Logic a Relay 10A-K46A Failed to Energize.Caused by Disconnected Lead of Contact to Relay Coils Control Circuit. Wire Was Reconnected & Sys Returned to Operation | |
| 05000271/LER-1979-014, Forwards LER 79-014/03L-0 | Forwards LER 79-014/03L-0 | |
| 05000271/LER-1979-014-03, /03L-0 on 790712:during Surveillance Testing of Drywell to Torus Vacuum Breakers,Loss of Containment Air Monitor Occurred.Caused by Corrosion Seizure of Vanes.Spare Pump Was Installed & Failed Pump Repaired | /03L-0 on 790712:during Surveillance Testing of Drywell to Torus Vacuum Breakers,Loss of Containment Air Monitor Occurred.Caused by Corrosion Seizure of Vanes.Spare Pump Was Installed & Failed Pump Repaired | |
| 05000271/LER-1979-015, Forwards LER 79-015/03L-0 | Forwards LER 79-015/03L-0 | |
| 05000271/LER-1979-015-03, /03L-0:on 790802,during Investigation of Seismic Class 1 Hangers,Anchor Bolts of MS-H-A10 Found Dislodged from Wall.Cause Unknown at Present.Present Review of Seismic Class 1 Sys Will Identify Necessary Mods | /03L-0:on 790802,during Investigation of Seismic Class 1 Hangers,Anchor Bolts of MS-H-A10 Found Dislodged from Wall.Cause Unknown at Present.Present Review of Seismic Class 1 Sys Will Identify Necessary Mods | |
| 05000271/LER-1979-016, Forwards LER 79-016/03L-0 | Forwards LER 79-016/03L-0 | |
| 05000271/LER-1979-016-03, /03L-0 on 790717:redundant Containment Isolation Capability Not Available.Caused by Requirement to Disassemble Valve for Maint.Valve Cleaned,Reassembled,Tested & Returned to Svc | /03L-0 on 790717:redundant Containment Isolation Capability Not Available.Caused by Requirement to Disassemble Valve for Maint.Valve Cleaned,Reassembled,Tested & Returned to Svc | |
| 05000271/LER-1979-017, Forwards LER 79-017/03L-0 | Forwards LER 79-017/03L-0 | |
| 05000271/LER-1979-017-03, /03L-0 on 790731:during Normal Operations, Containment Air Monitor Pump Found Inoperable. Caused by Corrosion Seizure of Vanes.Spare Pump Installed & Failed Pump Overhauled.Engineering Review in Progress | /03L-0 on 790731:during Normal Operations, Containment Air Monitor Pump Found Inoperable. Caused by Corrosion Seizure of Vanes.Spare Pump Installed & Failed Pump Overhauled.Engineering Review in Progress | |
| 05000271/LER-1979-018, Forwards LER 79-018/03L-0 | Forwards LER 79-018/03L-0 | |
| 05000271/LER-1979-018-03, /03L-0:on 790802,during Power Increase After Maint Power Reduction,Max Critical Power Rating Was Below Tech Spec Min.Caused by power-increasing Xenon Transient.Control Rods Inserted & Core Flow Increased for Continued Operat | /03L-0:on 790802,during Power Increase After Maint Power Reduction,Max Critical Power Rating Was Below Tech Spec Min.Caused by power-increasing Xenon Transient.Control Rods Inserted & Core Flow Increased for Continued Operation | |
| 05000271/LER-1979-019-03, /03L-0:on 790806 Noted That No Air Particulate & Radioiodine Samples Were Collected for Week of 790806 at Station at 1.2 Due to Sampling Pumps Being Turned Off.Caused by Personnel Error | /03L-0:on 790806 Noted That No Air Particulate & Radioiodine Samples Were Collected for Week of 790806 at Station at 1.2 Due to Sampling Pumps Being Turned Off.Caused by Personnel Error | |
| 05000271/LER-1979-019, Forwards LER 79-019/03L-0 | Forwards LER 79-019/03L-0 | |
| 05000271/LER-1979-020, Forwards LER 79-020/03L-0 | Forwards LER 79-020/03L-0 | |
| 05000271/LER-1979-020-03, /03L-0:on 790815,during Surveillance Testing of Msiv,Inboard Valve V2-80A in Main Steam Line Closed Properly But Did Not Fully Reopen.Caused by Spring Plate Binding on Guide Shaft | /03L-0:on 790815,during Surveillance Testing of Msiv,Inboard Valve V2-80A in Main Steam Line Closed Properly But Did Not Fully Reopen.Caused by Spring Plate Binding on Guide Shaft | |
| 05000271/LER-1979-021, Forwards LER 79-021/03L-0 | Forwards LER 79-021/03L-0 | |
| 05000271/LER-1979-021-03, /03L-0:on 790816,transmitters LT-16-19-38A/B Underwent zero-shift & Common Ref Leg Was Not Completely Filled.Caused by Loss of Water in Common Ref Leg of Transmitters Compounded by Apparent zero-shift | /03L-0:on 790816,transmitters LT-16-19-38A/B Underwent zero-shift & Common Ref Leg Was Not Completely Filled.Caused by Loss of Water in Common Ref Leg of Transmitters Compounded by Apparent zero-shift | |
| 05000271/LER-1979-022, Forwards LER 79-022/03L-0 | Forwards LER 79-022/03L-0 | |
| 05000271/LER-1979-022-03, /03L-0:on 790911,halogenated Hydrocarbon Removal Efficiency Found to Be Less than Tech Specs.Caused by Excessive Carbon Filter Leakage.Charcoal Was Removed & Replaced | /03L-0:on 790911,halogenated Hydrocarbon Removal Efficiency Found to Be Less than Tech Specs.Caused by Excessive Carbon Filter Leakage.Charcoal Was Removed & Replaced | |
| 05000271/LER-1979-023-03, /03L-0:on 790919,LPCI Loop cross-tie Line Hanger Found Inadequate to Support Design Load.Caused by Improper Installation.Review of All Seismic Class I Sys Underway. Hanger Repaired W/New Anchor Bolts | /03L-0:on 790919,LPCI Loop cross-tie Line Hanger Found Inadequate to Support Design Load.Caused by Improper Installation.Review of All Seismic Class I Sys Underway. Hanger Repaired W/New Anchor Bolts | |
| 05000271/LER-1979-023, Forwards LER 79-023/03L-0 | Forwards LER 79-023/03L-0 | |
| 05000271/LER-1979-024, Forwards LER 79-024/03L-0 | Forwards LER 79-024/03L-0 | |
| 05000271/LER-1979-024-03, /03L-0:on 790920,abrupt Change Noted in Indicated Torus Water Level on Control Room Indicators.Hpci Suction Valves Shifted Lineup from Condensate Tank to Torus.Caused by Dislodged Fitting on Torus Level Transmitters | /03L-0:on 790920,abrupt Change Noted in Indicated Torus Water Level on Control Room Indicators.Hpci Suction Valves Shifted Lineup from Condensate Tank to Torus.Caused by Dislodged Fitting on Torus Level Transmitters | |
| 05000271/LER-1979-025-01, /01T-0:on 791003,water Rod Lower End Plug Wear Was Discovered on Two Assemblies.Caused by Flow Excitation of Water Rod Lower End Plugs by Cross Flows within Lower Tie Plate Flow Vol.Insp Program Will Be Developed | /01T-0:on 791003,water Rod Lower End Plug Wear Was Discovered on Two Assemblies.Caused by Flow Excitation of Water Rod Lower End Plugs by Cross Flows within Lower Tie Plate Flow Vol.Insp Program Will Be Developed | |
| 05000271/LER-1979-025, Forwards LER 79-025/01T-0 | Forwards LER 79-025/01T-0 | |
| 05000271/LER-1979-026, Forwards LER 79-026/03L-0 | Forwards LER 79-026/03L-0 | |
| 05000271/LER-1979-026-03, /03L:on 790926,during Safety Class Shock Suppressor Insp,Snubbber RR-13 on Loop a Recirculation Pump Had No Visible Fluid Level in Sight Glass.Caused by Leakage of Lenz Fitting.Snubber Completely Rebuilt & Tested | /03L:on 790926,during Safety Class Shock Suppressor Insp,Snubbber RR-13 on Loop a Recirculation Pump Had No Visible Fluid Level in Sight Glass.Caused by Leakage of Lenz Fitting.Snubber Completely Rebuilt & Tested | |
| 05000271/LER-1979-027, Forwards LER 79-027/03L-0 | Forwards LER 79-027/03L-0 | |
| 05000271/LER-1979-027-03, /03L-0:on 790925,mainsteam Safety/Relief Valves Sin 67HH13 Had Setpoint of 1,088 Psig,Greater than Tech Spec Max.Caused by Setpoint Drift.Valve Adjusted to Proper Setpoint | /03L-0:on 790925,mainsteam Safety/Relief Valves Sin 67HH13 Had Setpoint of 1,088 Psig,Greater than Tech Spec Max.Caused by Setpoint Drift.Valve Adjusted to Proper Setpoint | |
| 05000271/LER-1979-028-03, /03L-0:on 791028,two Primary Containment Isolation Valves Had Seat Leakages in Excess of Tech Spec Requirement. Cause Undetermined.Valves Repaired & Retested.Detailed Rept Will Be Prepared | /03L-0:on 791028,two Primary Containment Isolation Valves Had Seat Leakages in Excess of Tech Spec Requirement. Cause Undetermined.Valves Repaired & Retested.Detailed Rept Will Be Prepared | |
| 05000271/LER-1979-028, Forwards LER 79-028/03L-0 | Forwards LER 79-028/03L-0 | |
| 05000271/LER-1979-029, Forwards LER 79-029/03L-0 | Forwards LER 79-029/03L-0 | |
| 05000271/LER-1979-029-03, /03L-0:on 791104,during Surveillance Testing, MSIV-80 B & 86 C Closed in 2.5-s.Min Closure Time Is 3-s. Caused by Operator Failure to Recognize Potentially Degraded Condition of Msivs.Retimed within 3- to 5-s | /03L-0:on 791104,during Surveillance Testing, MSIV-80 B & 86 C Closed in 2.5-s.Min Closure Time Is 3-s. Caused by Operator Failure to Recognize Potentially Degraded Condition of Msivs.Retimed within 3- to 5-s | |
| 05000271/LER-1979-030-03, /03L-0:on 791110,during Steady State Operation, Increasing Trend in Torus Water Level Observed.Caused by Leaking Bypass Valve for Torus Level Transmitters.Water Indication Restored Per Tech Specs | /03L-0:on 791110,during Steady State Operation, Increasing Trend in Torus Water Level Observed.Caused by Leaking Bypass Valve for Torus Level Transmitters.Water Indication Restored Per Tech Specs | |
| 05000271/LER-1979-030, Forwards LER 79-030/03L-0 | Forwards LER 79-030/03L-0 | |
| 05000271/LER-1979-031-03, /03L-0:on 791110,during Refueling/Maint Outage, Hangers RCIC-H-82 & HPCI-HD-67B Removed from Svc.Removal Unnoticed During Review.Caused by Personnel Error.Hangers Returned to Svc | /03L-0:on 791110,during Refueling/Maint Outage, Hangers RCIC-H-82 & HPCI-HD-67B Removed from Svc.Removal Unnoticed During Review.Caused by Personnel Error.Hangers Returned to Svc | |
| 05000271/LER-1979-031, Forwards LER 79-031/03L-0 | Forwards LER 79-031/03L-0 | |
| 05000271/LER-1979-032-03, /03L-0:on 791204,Seismic Class I Hanger CST-HD19B Found to Be Damaged & Inoperable During Review Per IE Bulletin 79-02.Cause Under Investigation.Hanger Replaced & Design Changes Are Being Tested | /03L-0:on 791204,Seismic Class I Hanger CST-HD19B Found to Be Damaged & Inoperable During Review Per IE Bulletin 79-02.Cause Under Investigation.Hanger Replaced & Design Changes Are Being Tested | |
| 05000271/LER-1979-032, Forwards LER 79-032/03L-0 | Forwards LER 79-032/03L-0 | |
| 05000271/LER-1979-033-01, /01P-0:on 791205,seismic Analyses Revealed That Pipe Supports in Five Sys May Be Inadequate to Support Seismic Loads.Caused by Incorrect Design or Application of Pipe Supports.Appropriate Mods to Sys Will Be Performed | /01P-0:on 791205,seismic Analyses Revealed That Pipe Supports in Five Sys May Be Inadequate to Support Seismic Loads.Caused by Incorrect Design or Application of Pipe Supports.Appropriate Mods to Sys Will Be Performed | |
