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Issue date | Title | Topic | |
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05000000/LER-1950-237, Updated LER 50-237/01L:on 760406,unacceptable Ultrasonic Indication Found on Isolation Condenser safe-end.Caused by Cracks in safe-ends.Cracked safe-end Removed & Sent to Bmcl for Metallographic Analysis | 13 July 1976 | Updated LER 50-237/01L:on 760406,unacceptable Ultrasonic Indication Found on Isolation Condenser safe-end.Caused by Cracks in safe-ends.Cracked safe-end Removed & Sent to Bmcl for Metallographic Analysis | |
05000237/LER-1950-237, Updated LER 50-237/75-048:on 751007,through-wall Crack Found in Drywell/Torus Nitrogen Purge Line 1604-18.Addl Mods, Including Temp Controlled Isolation Valve Installation, Delayed Until Proposal Review | 10 June 1977 | Updated LER 50-237/75-048:on 751007,through-wall Crack Found in Drywell/Torus Nitrogen Purge Line 1604-18.Addl Mods, Including Temp Controlled Isolation Valve Installation, Delayed Until Proposal Review | |
05000237/LER-1976-053, Updated LER 76-053/01T-1:on 760803,util Advised by GE That MAPLHGR Limits in Effect No Longer Considered Sufficiently Conservative at Low Core Flow Rates.Problem Thought to Be ECCS Models Used to Determine Rates | 3 January 1977 | Updated LER 76-053/01T-1:on 760803,util Advised by GE That MAPLHGR Limits in Effect No Longer Considered Sufficiently Conservative at Low Core Flow Rates.Problem Thought to Be ECCS Models Used to Determine Rates | |
05000237/LER-1976-063, Updated LER 76-063/03L-l:on 761003,stack Gas Sample Pump Flow Appeared Abnormally Low.Caused by Collection of Carbon Impeller Vane Products in Pump Cavity & Filter.Pump & Filter Replaced | 3 March 1977 | Updated LER 76-063/03L-l:on 761003,stack Gas Sample Pump Flow Appeared Abnormally Low.Caused by Collection of Carbon Impeller Vane Products in Pump Cavity & Filter.Pump & Filter Replaced | |
05000237/LER-1976-066, Updated LER 76-066/01T-1:on 761113,during Maint Outage,Hpci Injection Valve M02-23018 Found in Closed Position W/Valve Stem Severed.Caused by Mechanical Overstress of Stem.Stem Replaced | 13 May 1977 | Updated LER 76-066/01T-1:on 761113,during Maint Outage,Hpci Injection Valve M02-23018 Found in Closed Position W/Valve Stem Severed.Caused by Mechanical Overstress of Stem.Stem Replaced | |
05000237/LER-1982-023, Revised Deviation Rept for LER 82-023/03L-0:on 820623, Wrong Assumption Made for Drywell to Torus Differential Pressure.Caused by High Torus Pressure Transmitter 2-1673 Measurement | 23 July 1982 | Revised Deviation Rept for LER 82-023/03L-0:on 820623, Wrong Assumption Made for Drywell to Torus Differential Pressure.Caused by High Torus Pressure Transmitter 2-1673 Measurement | |
05000237/LER-1983-080, Supplemental LER 83-080/03X-1:on 831124,offgas Log Rad Monitor 2-1705-A Delivered Offgas High Alarm & High Alarm Spiked & Drifted Downscale.Caused by Burned Out Resistor. Power Supply Installed & Monitor Calibr | 20 December 1983 | Supplemental LER 83-080/03X-1:on 831124,offgas Log Rad Monitor 2-1705-A Delivered Offgas High Alarm & High Alarm Spiked & Drifted Downscale.Caused by Burned Out Resistor. Power Supply Installed & Monitor Calibr | |
05000237/LER-1983-084, Updated LER 83-084/03X-1:on 831230,during Normal Operation, Primary Containment Oxygen Sample from Torus Alarmed on Low Level Sample Flow.Caused by Sample Line Moisture.Line Drained & Leads reconnected.W/840314 Ltr | 14 March 1984 | Updated LER 83-084/03X-1:on 831230,during Normal Operation, Primary Containment Oxygen Sample from Torus Alarmed on Low Level Sample Flow.Caused by Sample Line Moisture.Line Drained & Leads reconnected.W/840314 Ltr | |
05000254/LER-1976-002, Updated LER 76-002/03L Re Excessive Leakage from Double Gasketed Seal X-4.Initially Reported on 760202.Caused by Equipment Failure & Insufficient Compression.Hatch Bolts Tightened | 3 March 1976 | Updated LER 76-002/03L Re Excessive Leakage from Double Gasketed Seal X-4.Initially Reported on 760202.Caused by Equipment Failure & Insufficient Compression.Hatch Bolts Tightened | |
05000254/LER-1982-022, Supplemental LER 82-022/03L-1:on 820816,maint Outage for 1/2B Diesel Fire Pump Exceeded 7-day Limit.Cause Not Stated. Diesel Pump Wear Rings Replaced | 7 October 1982 | Supplemental LER 82-022/03L-1:on 820816,maint Outage for 1/2B Diesel Fire Pump Exceeded 7-day Limit.Cause Not Stated. Diesel Pump Wear Rings Replaced | |
05000254/LER-1984-018, :on 840922 & 24,reactor Bldg Fuel Pool Channel B Area Radiation Monitor 1705-16B Spiked High, Tripping Ventilation.Cause Unknown.Corrective Actions for Both Events Will Be Documented in Suppl to LER 84-018 | 11 October 1984 |
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05000254/LER-1988-001, Sanitized Version of LER 88-001-00:on 880114,records Review Found Two Apparent Overexposures of Contractor Personnel During Fourth Quarter 1980.Caused by Inaccurate Secondary &/ or Primary Dosimetry.Dosimetry Sys Upgraded | 28 January 1988 | Sanitized Version of LER 88-001-00:on 880114,records Review Found Two Apparent Overexposures of Contractor Personnel During Fourth Quarter 1980.Caused by Inaccurate Secondary &/ or Primary Dosimetry.Dosimetry Sys Upgraded | |
05000254/LER-1990-013 | 24 July 1990 | LER 90-013-00:on 900626,annunciators on Both Units & Reactor Recirculation Loop Sample Valve Closed.Caused by Actuation of Primary Containment Isolation Valve When Lightning Struck 345 Kv Line.Valve reopened.W/900724 Ltr | |
05000254/LER-1993-008 | 11 August 1993 | LER 93-008-00:on 930709,reactor Bldg Ventilation Radiation Monitor Setpoints Set non-conservatively Four Times in Five Yrs.Caused by Instrument Maint Program Error. New Computer Program developed.W/930805 Ltr | Offsite Dose Calculation Manual |
05000254/LER-1993-009 | 13 August 1993 | LER 93-009-00:on 930714,SBGT Methyl Iodide Test Failed Due to Age of Charcoal Combined W/Stringent Test Criteria. Replaced Charcoal Absorber in Both Trains of Sbgt. W/930806 Ltr | |
05000254/LER-1993-010 | 19 August 1993 | LER 93-010-00:on 930720,HPCI Declared Inoperable & HPCI Outage Rept Qcos 2300-2 Initiated Because IST Flow Rate Fell in IST Required Action Range Due to New Procedure. Surveillance Procedure Will Be revised.W/930819 Ltr | |
05000254/LER-1993-011 | 18 August 1993 | LER 93-011-00:on 930721,discovered That 4kV Breaker 68 Feeding CS 1B Motor Pump Open & Discharged,Resulting in CS 1B Being Declared Inoperable.Wr Written to Investigate & repair.W/930813 Ltr | |
05000254/LER-1993-012 | 24 August 1993 | LER 93-012-00:on 930726,light Socket Shorted Out When Operator Reset HPCI Logic Power.Caused by Short Circuit in Light Socket.Light Socket & Blown Fuses replaced.W/930824 Ltr | Reactor Vessel Water Level |
05000254/LER-1993-013 | 27 August 1993 | LER 93-013-00:on 930729,identified Deviation from TS & Reg Guide 1.52 Requirements for Methyl Iodide Testing of Charcoal Sample Canisters.Caused by Failure to Implement Proper Canister Testing.Canisters Tested by Nucon | |
05000265/LER-1976-012, Updated LER 76-012/03L-1 Correcting Event Type,Category & Rept type.W/761001 Forwarding Ltr | 1 October 1976 | Updated LER 76-012/03L-1 Correcting Event Type,Category & Rept type.W/761001 Forwarding Ltr | |
05000265/LER-1982-018, Supplemental LER 82-018/03L-1:on 821006,emergency Diesel Generator Tripped on High Temp After Loading.Caused by Fouling of Diesel Generator Cooling Water Sys.Both HX Replaced | 1 December 1982 | Supplemental LER 82-018/03L-1:on 821006,emergency Diesel Generator Tripped on High Temp After Loading.Caused by Fouling of Diesel Generator Cooling Water Sys.Both HX Replaced | |
05000265/LER-1983-018, Revised LER 83-018/01T-1:on 831011,discovered 1-1/4 Inch long,20% through-wall Linear Indication in Weld 12S-S27. Caused by Intergranular Stress Corrosion Cracking.New Welds & Elbow Installed | 2 February 1984 | Revised LER 83-018/01T-1:on 831011,discovered 1-1/4 Inch long,20% through-wall Linear Indication in Weld 12S-S27. Caused by Intergranular Stress Corrosion Cracking.New Welds & Elbow Installed | Hydrostatic Liquid penetrant |
05000265/LER-1983-020, Revised LER 83-020/01T-1:on 831028,weld 02B-S9,22-inch Pipe to Cap,Weld 02BS-S12,28-inch Elbow to Pipe & Weld 02BS-F14, 28-inch Pipe to Elbow Weld Had Circumferential Linear Indications | 9 December 1983 | Revised LER 83-020/01T-1:on 831028,weld 02B-S9,22-inch Pipe to Cap,Weld 02BS-S12,28-inch Elbow to Pipe & Weld 02BS-F14, 28-inch Pipe to Elbow Weld Had Circumferential Linear Indications | Weld Overlay |
05000265/LER-1983-021, Revised LER 83-021/01T-5:on 831028,ultrasonic Exams of Large Bore Stainless Steel Pipe Welds Identified 11 Welds W/Crack Indications.Caused by Intergranular Stress Corrosion Cracking.Weld Overlay Performed | 28 February 1984 | Revised LER 83-021/01T-5:on 831028,ultrasonic Exams of Large Bore Stainless Steel Pipe Welds Identified 11 Welds W/Crack Indications.Caused by Intergranular Stress Corrosion Cracking.Weld Overlay Performed | Weld Overlay |
05000265/LER-1988-006, Errata to LER 88-006-02:on 880404,station Notified That Eleven Flued Head Anchors Did Not Meet Design Requirements. Caused by Misinterpretation of Scope & Design Structures.Mod Initiated to Revise Structure | 4 June 1992 | Errata to LER 88-006-02:on 880404,station Notified That Eleven Flued Head Anchors Did Not Meet Design Requirements. Caused by Misinterpretation of Scope & Design Structures.Mod Initiated to Revise Structure | |
B130172, Safety Evaluation for Quad Cities Unit 1 Core Spray Line Repair | 31 January 1996 | Safety Evaluation for Quad Cities Unit 1 Core Spray Line Repair | Safe Shutdown Abnormal operational transient Flow Induced Vibration |
ML17174A100 | 30 October 1979 | LER 79-055/03L-0:on 791004,following Pipe Hanger Repairs, Valve 2-1601-60 Failed to Close by Moving Control Switch, But Did Close When Versa Air Switching Valve Was Tapped. Caused by Malfunction of Versa Air Switching Valve | |
ML17174A109 | 29 October 1979 | LER 79-054/03L-0:on 791004,portion of Drywell Ventilating Line 2-1605-10 Declared Inoperable Due to Degraded Pipe Supports.Caused by Insufficient Thread Engagement & Missing Nuts,Causing Hanger Supports to Become Loose.Nuts Replaced | |
ML17174A111 | 1 November 1979 | LER 79-053/03L-0:on 791003,trip of Fuel Pool Area Radiation Monitor Resulted in Autostart of Standby Gas Treatment Sys & Isolation of Rx Bldg Vent Sys.Caused by Diaphram Drift to Setpoint Shift | |
ML17174A114 | 31 October 1979 | LER 79-057/01T-0:on 791019,while in Shutdown,Three of 16 MSIV Scram Limit Switches Found W/Setpoints Greater than 10%.Caused by Not Performing Field Calibr on Switch Setpoints Set by Manufacturer.Limit Switches Readjusted | |
ML17174A117 | 30 October 1979 | LER 79-027/03L-0:on 791003,half of Trip Sys Inoperable Due to Lifting of Flooding Magnetrol Switch Leads to Condenser Pit.Switch Leads Reattached.No Precise Cause Found | |
ML17174A124 | 22 October 1979 | LER 79-033/03X-1:on 790428,while Performing Primary Containment Isolation Valve surveillance,2CTIP Machine Did Not Retract During Group 2 Isolation Test.Caused by Ball Valve Limit Switches Not Making Up When Ball Valve Opened | |
ML17187A804 | 28 February 1994 | Containment Analysis of DBA-LOCA to Update Design Basis for Lpci/Ccs, for GENE-637-042-1193 | |
ML17187A805 | 31 January 1993 | Suppl 1 to GENE-770-26-1092, Long Term Containment Response to DBA-LOCA w/65 Fdegrees F Svc Water Temperature,80 Degrees F Initial Pool Temperature & Initiation of Containment Cooling at 1800 Seconds. | Reactor Vessel Water Level Fuel cladding |
ML17192A519 | 14 February 1980 | LER 80-002/03L-0:on 800122,while Performing LPCI Monthly surveillance,MO-3-1501-11B Valve Would Not Close. Reoccurrence on 800213.Investigation Revealed No Cause | |
ML17193A708 | 30 November 1980 | SEP Review of NRC Safety Topic VI-7.A.3 Associated W/ Electrical,Instrumentation & Control Portions of ECCS Actuation Sys. | Scram Discharge Volume Fuel cladding Coast down |
ML17194A063 | 31 May 1981 | Errata & Addenda Sheet 5,replacing Pages V/VI,3-1/3-2,4-10, 4-12,4-13 & 4-14 to LOCA Analysis Rept for Dresden Units 2 & 3 & Quad Cities 1 & 2 Nuclear Power Stations. | |
ML17194A065 | 31 July 1981 | Errata & Addenda Sheet 6,replacing Pages V/VI,3-1,3-2,4-3 & 4-14,to LOCA Analysis Rept for Dresden Units 2 & 3 & Quad Cities 1 & 2 Nuclear Power Stations. | |
ML17194A372 | 31 December 1981 | Control Room Habitability Study for Quad Cities 1 & 2, Final Rept | |
ML17195A952 | 18 September 1985 | Safety Evaluation Approving Util plant-unique Analysis Rept on Pool Dynamic Loads | |
ML17195A953 | 18 September 1985 | Safety Evaluation Approving Util Mods to Containments & Torus Attached Piping as Documented in COM-02-041-1 Through 7 Entitled, Technical Evaluation of Dresden Nuclear Power Station Units 2 & 3,Plant-Unique Analysis Rept. | |
ML17202G776 | 31 December 1989 | Core Operating Limits Rept,Dresden Station Unit 2,Cycle 12,Rev 0. | |
ML17202L259 | 31 May 1990 | Rev 1 to Core Operating Limits Rept,Dresden Station Unit 2, Cycle 12. | Fuel cladding |
ML17202L288 | 29 June 1990 | II Upper Vessel Contract Variation Review. | |
ML17252A753 | 30 November 1992 | Lpci/Containment Cooling Sys Evaluation. | Reactor Vessel Water Level Coatings Turbine Missile Flow Induced Vibration |
ML17338B327 | 20 September 1979 | LER 79-021/03L-0:on 790821,during Normal Operation,Offgas Monitor 3A Took Step Increase W/No Power Change & hi-hi Trip Light Was On.Caused by Faulty V1 Electrometer Tube,Which Was Replaced.Monitors Will Be Tested Monthly | Power change |
ML17338B328 | 17 September 1979 | LER 79-023/03L-0:on 790823,source Range Monitor Calibr Supplied Rod Block Trip at 1.03E5,exceeding Tech Specs Limit.Caused by Drift & Temp Dependency in Source Range Monitor.Defective Component Not Yet Identified | |
ML17340B416 | 26 March 1980 | Updated LER 80-030/03X-1:on 791110,during Scram Testing in Refuel Mode,Substantial Loss of Position Indication Noted for Control Rod Driveline H-9.Caused by Improperly Seated Socket,Suggesting Faulty Electrical pin-socket Alignment | |
ML17340B419 | 28 March 1980 | LER 80-011/03L-0:on 800305,while Conducting Steam Line Area Temp Switch Calibr Surveillance,Temp Switch TS 3-261-17B Tripped Above Tech Specs.Caused by Dirt Deposits on Switch Actuation Plunger.Switch Cleaned,Adjusted & Tested | |
ML17352B250 | 1 October 1993 | LER 93-014-00:on 930902,discovered That IRM 11 & APRM Both in Bypassed Condition W/O Half Scram Being Inserted Due to Work Practices.Irm 11 Taken Out of Bypassed Condition & Individual Involved counselled.W/931001 Ltr | Half scram |