| | Site | Start date | Title |
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| 05000328/LER-2020-001, Ice Bed Inoperable Due to Exceeding Maximum Allowed Ice Bed Temperature | Sequoyah | 16 September 2020 | Ice Bed Inoperable Due to Exceeding Maximum Allowed Ice Bed Temperature |
| 05000282/LER-2012-005-01, Regarding Diesel Generators Inoperable Due to Exhaust Fire | Prairie Island | 25 July 2013 | Regarding Diesel Generators Inoperable Due to Exhaust Fire |
| 05000271/LER-2011-001, Inoperability of the High Pressure Coolant Injection System Due to Failure to Follow Procedures | Vermont Yankee | 14 April 2011 | Inoperability of the High Pressure Coolant Injection System Due to Failure to Follow Procedures |
| 05000461/LER-1998-025, :on 860929,repeated Failures of Switchgear Heat Removal Condenser Gasket Occurred.Caused by Inadequate Design Consideration of Pressure Transient Effects of Shutdown SWS Components.Installed blow-out Resistant Gasket | Clinton | 1 September 1998 |
- on 860929,repeated Failures of Switchgear Heat Removal Condenser Gasket Occurred.Caused by Inadequate Design Consideration of Pressure Transient Effects of Shutdown SWS Components.Installed blow-out Resistant Gasket
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| 05000482/LER-1997-008, :on 970520,manual Reactor Trip Occurred,Due to Steam Leak in non-safety Related Third Stage Extraction Steam Isolation Valve.Caused by Lack of Guidance.Engineering Disposition to EER Will Be Revised by 970620 | Wolf Creek | 19 June 1997 |
- on 970520,manual Reactor Trip Occurred,Due to Steam Leak in non-safety Related Third Stage Extraction Steam Isolation Valve.Caused by Lack of Guidance.Engineering Disposition to EER Will Be Revised by 970620
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| 05000281/LER-1993-006-03, :on 931115,Unit 2 Experienced Automatic Reactor Trip.Caused by Electrical Circuit Failure.Electrical Failure Traced to Defective Circuit Breaker & Replaced | Surry | 13 December 1993 |
- on 931115,Unit 2 Experienced Automatic Reactor Trip.Caused by Electrical Circuit Failure.Electrical Failure Traced to Defective Circuit Breaker & Replaced
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| 05000155/LER-1989-009-01, :on 891027 & 31,turbine Bypass Valve Would Not Open When Given Open Signal.Caused by Characteristics of Garlock Style 938 Which Hardens When Subj to Heat & Pressure.Valves Repacked Using Carbon Spacers | Big Rock Point | 9 January 1990 |
- on 891027 & 31,turbine Bypass Valve Would Not Open When Given Open Signal.Caused by Characteristics of Garlock Style 938 Which Hardens When Subj to Heat & Pressure.Valves Repacked Using Carbon Spacers
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| 05000370/LER-1989-010-01, :on 890905,leak Occurred on Containment Spray HX 2A After Valve Stroke Timing.Caused by Valve Stroking Procedure Being Deficient & Lack of Attention to Detail. Procedures to Be Revised & Work Load Spread | Mcguire | 7 December 1989 |
- on 890905,leak Occurred on Containment Spray HX 2A After Valve Stroke Timing.Caused by Valve Stroking Procedure Being Deficient & Lack of Attention to Detail. Procedures to Be Revised & Work Load Spread
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| 05000370/LER-1989-010, :on 890905,leak Occurred on Containment Spray HX 2A After Valve Stroke Timing Because of Deficient Procedure & Inappropriate Action.C/A 6 Being Replaced W/C/A 7 Due to Reorganization at Facility | Mcguire | 23 October 1989 |
- on 890905,leak Occurred on Containment Spray HX 2A After Valve Stroke Timing Because of Deficient Procedure & Inappropriate Action.C/A 6 Being Replaced W/C/A 7 Due to Reorganization at Facility
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| 05000265/LER-1986-014, :on 861012,while Performing Refuel Outage Local Leak Rate Testing,Measured Combined Leakage for Penetrations & Valves,Except Msivs,Found to Be in Excess of Tech Spec Limit.Caused by Wear or Design Deficiency | Quad Cities | 10 June 1987 |
- on 861012,while Performing Refuel Outage Local Leak Rate Testing,Measured Combined Leakage for Penetrations & Valves,Except Msivs,Found to Be in Excess of Tech Spec Limit.Caused by Wear or Design Deficiency
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| 05000265/LER-1986-015-08, :on 861013,leakage from Containment Exceeded 75% of La Required by Tech Spec 3.7.A.2.b.Caused by Reduced Resiliency of Silicon Rubber Mfg by J-Bar Silicon Corp. Silicon Rubber Replaced | Quad Cities | 6 November 1986 |
- on 861013,leakage from Containment Exceeded 75% of La Required by Tech Spec 3.7.A.2.b.Caused by Reduced Resiliency of Silicon Rubber Mfg by J-Bar Silicon Corp. Silicon Rubber Replaced
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| 05000331/LER-1986-011, :on 860401,during Scheduled Maint Outage,Main Steam Line Isolation Valve Hung Up in Partially Open Position.Caused by Metallurgical Flaw in Stellite on Junk Ring.Galling Removed from Ring & Valve | Duane Arnold | 1 May 1986 |
- on 860401,during Scheduled Maint Outage,Main Steam Line Isolation Valve Hung Up in Partially Open Position.Caused by Metallurgical Flaw in Stellite on Junk Ring.Galling Removed from Ring & Valve
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| 05000335/LER-1984-012-03, :on 841219,reactor Tripped on Low Steam Generator Water Level & Loss of Electrical Sys.Caused by 1B Diesel Generator Output Breaker Closure.Breaker Replaced. Related Info Encl | Saint Lucie | 18 January 1985 |
- on 841219,reactor Tripped on Low Steam Generator Water Level & Loss of Electrical Sys.Caused by 1B Diesel Generator Output Breaker Closure.Breaker Replaced. Related Info Encl
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| 05000277/LER-1982-001-03, /03L-0:on 820123,during Startup,Local Leak Rate Test of Drywell Airlock Revealed Excess Leakage.Caused by Damaged Garlock Door Gaskets.Gaskets Replaced & Leak Rate Tested | Peach Bottom | 23 February 1982 | /03L-0:on 820123,during Startup,Local Leak Rate Test of Drywell Airlock Revealed Excess Leakage.Caused by Damaged Garlock Door Gaskets.Gaskets Replaced & Leak Rate Tested |
| 05000255/LER-2077-001, License Event Report 1977-001-00 Control Rod Drive. Due to Seal Leakage Problems, CRDM No 4 Is Being Considered Inoperable | Palisades | 17 January 1977 | License Event Report 1977-001-00 Control Rod Drive. Due to Seal Leakage Problems, CRDM No 4 Is Being Considered Inoperable |
| 05000255/LER-2076-029, License Event Reports 1976-029-00, 1976-030-00, & 1976-031-00 Re Control Rod Drives | Palisades | 21 September 1976 | License Event Reports 1976-029-00, 1976-030-00, & 1976-031-00 Re Control Rod Drives |
| 05000278/LER-1976-040-03, /03L,drywell Air Lock Inner Door Had Unacceptable Leakage.Caused by Oversize Gasket.Gasket Replaced & Tested Satisfactorily | Peach Bottom | 27 May 1976 | /03L,drywell Air Lock Inner Door Had Unacceptable Leakage.Caused by Oversize Gasket.Gasket Replaced & Tested Satisfactorily |
| 05000278/LER-1976-027-03, /03L:on 760224,drywell Air Lock Inner Door Found to Have Unacceptable Leak.Caused by Permanent Set in Gasket Due to Normal use-related Aging.Gasket Replaced & Packing Glands on Manual Door Operator Shaft Tightened | Peach Bottom | 25 March 1976 | /03L:on 760224,drywell Air Lock Inner Door Found to Have Unacceptable Leak.Caused by Permanent Set in Gasket Due to Normal use-related Aging.Gasket Replaced & Packing Glands on Manual Door Operator Shaft Tightened |