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| Issue date | Title | Topic | |
|---|---|---|---|
| ML20042D314 | 29 December 1989 | LER 89-032-00:on 891210,as-left Type B & C Local Leak Rate Test Data Exceeded Tech Spec Limit of 488.452 Std Cubic Ft/H.Caused by Degradation of Telephone & Electrical Conduit Penetration Seal.Conduit Cut & capped.W/891229 Ltr | |
| ML20024E927 | 30 August 1983 | LER 83-062/01T-0:on 830819,HPCI Motor Gear Unit Observed Moving Between High & Low Speed Stops W/O Operation Action. Caused by Failure of HPCI Controller Amplifier.Amplifier replaced.W/830830 Ltr | |
| ML20024D834 | 28 July 1983 | LER 83-055/01T-0:on 830719,one 1/8 by 1/16-inch Hole Found on Bellows Seal on Torus to Drywell Vacuum Breaker Line Containing Breakers 2-1601-32A & B.Cavity Filled to Original Thickness & Surface buffed.W/830728 Ltr | Fuel cladding Liquid penetrant |
| ML20024D699 | 27 July 1983 | Updated LER 83-057/03X-1:on 821224,while Performing Routine Insp,Pinhole Leak Found in 2D3 to 2C3 Feedwater Heater Normal Drain Line.Caused by Excessive Movement of 2D3 Drain Line.Mod Initiated to Add restraints.W/830727 Ltr | |
| ML20024B640 | 30 June 1983 | LER 83-044/03L-0:on 830603,review of Area X Temp Showed Increase of Approx 25 F Due to Crack in Test Tap on MSIV 2C. Caused by Fatigue Due to Improper Support of 3/4-inch Test Connection.Steam Line Cut & capped.W/830630 Ltr | |
| ML20024B764 | 29 June 1983 | LER 83-045/03L-0:on 830608,during Normal Operation,Circuit Breaker for Core Spray Injection Valve MO2-1402-25B Tripped. Caused by Incorrect Setting on Circuit Breaker,Due to Personnel Error.Breaker Set correctly.W/830629 Ltr | |
| ML20024B672 | 24 June 1983 | Updated LER 82-053/03X-1:on 821215,while Performing LPCI Valve Operability surveillance,2A LPCI HX Bypass Valve Position Identification Lost.Breaker Trip Setting Found to Be One Setting Too Low.Cause unknown.W/830624 Ltr | |
| ML20024A528 | 1 June 1983 | LER 83-019/03L-0:on 830521,MSIV 203-1B Found W/Closure Time of 2.7 Exceeding Tech Spec Limit of 3 to 5 S.Caused by Misadjustment to Timing Mechanism on MSIV-203-1B.MSIV Adjusted within Tech Spec limits.W/830608 Ltr | |
| ML20023D839 | 25 May 1983 | LER 83-035/03L-0:on 830427,low Pressure Coolant Injection HX Discharge Valve MO2-1501-3B Failed to Open.Cause Undetermined.Control Circuitry Inspected by Electrical & Instrument Maint & Found satisfactory.W/830525 Ltr | |
| ML20023D997 | 23 May 1983 | Updated LER 83-013/03X-1:on 830211,power Lead from Welding Machine Became Disconnected & Grounded to Torus Base Metal Causing Arc Strike Which Fused Copper/Brass Into Metal. Cause Considered accident.W/830523 Ltr | |
| ML20023C296 | 5 May 1983 | LER 83-027/03L-0:on 830408,during Valve Insp,Grease Discovered on Seats & Discs.Caused by Maint Procedures Not Prohibiting Personnel Placing Grease on Seat & Disc.Grease Removed,Valves Repaired & Procedures Will Be Revised | |
| ML20023C280 | 4 May 1983 | LER 83-025/03L-0:on 830409,reactor Bldg Fuel Pool Channel a High Radiation Alarm Activated,Causing Reactor Bldg Vent Sys to Trip.Caused by Burned Out Relay Coil.Relay Coil Replaced | |
| ML20023B827 | 26 April 1983 | LER 83-024/03L-0:on 830403,while Performing Core Spray Operability Test,Valve Mo 1402-4A Failed to Open.Caused by Burned Out Motor.Motor Replaced | |
| ML20028F360 | 19 January 1983 | LER 82-058/03L-0:on 821226,small Leak Found on Reactor Water Cleanup Line 2-1201B 8-inch-A Between 2-1201-135B & 98B Valves.Cause Unknown.Pipe Will Be Examined When Section Replaced During 1983 Refueling Outage | |
| ML20028F479 | 19 January 1983 | LER 83-003/03L-0:on 830108,during Surveillances Dis 1400-5 & DOS 6600-1,diesel Generator Low Water Pressure Alarm Received.Caused by Bad Low Cooling Water Pressure Switch. Switch Replaced W/Class 9012 Type GAW-5 | |
| ML20028E791 | 18 January 1983 | LER 82-057/03L-0:on 821224,pin Hole Leak Found in 2D3 to 2C3 Feedwater Heater Normal Drain Line.Caused by Excessive Movement of 2D3 Feedwater Heater Normal Drain Line.Mod to Add Sys Restraints Initiated | |
| ML20028E985 | 14 January 1983 | LER 83-002/01T-0:on 830105,during Mode 1,while Performing Leak Checks,Tap Isolation Valve 3-1299-13 & Pipe Cap Found Blowing Steam.Cause Unknown.Pipe Threads Chased & New Cap Installed.Valve Will Be Replaced During Next Refueling | |
| ML20028E242 | 12 January 1983 | LER 82-056/03L-0:on 821218,rod Block Setpoint of 12.2% Found on APRM 6.Caused by Setpoint Drift.Aprm 6 Bypassed While Rod Block Setpoint Readjusted | |
| ML20028E268 | 10 January 1983 | LER 82-049/03L-0:on 821217,D-3 Diesel Generator Failed to Start on Two Successive Attempts Following Semiannual Insp. Caused by Worn Out Cylinder & Accumulation of Dust Particles Inside Air Starter.Starter Replaced | |
| ML20028E964 | 10 January 1983 | Updated LER 82-043/03X-1:on 821028,during Mode 1,w/east Scram Discharge Vol Level Switches Under Test,Magnetrol Level Switches 82D & 82F Would Not Trip on Command.Caused by Misaligned Upper Switch Contact Mechanisms | Scram Discharge Volume |
| ML20028C227 | 20 December 1982 | LER 82-049/03L-0:on 821128,during Quarterly Valve Timing Surveillance DOS 1600-1,torus Inert & Purge Valve 2-1601-56 Would Not auto-close.Caused by Versa Valve Leaking from Weep Hole Due to Hardening of O-ring Seal.Valve Replaced | |
| ML20028E695 | 17 December 1982 | Updated LER 82-046/03X-1:on 821112,during Routine Insp,Water Discovered Spraying from 1-inch Drain Line Off Bottom of 3A Feedwater Isolation Valve MO3-3206A.Caused by Cracked Weld. Drain/Line Removed & Refitted | |
| ML20028C200 | 8 December 1982 | Updated LER 82-030/03X-1:on 820716,3A TIP Ball Valve Failed to Reclose After Opening During Valve Exercise.Cause Unknown.Limit Switches & Ball Valve Replaced & Successfully Tested | |
| ML20028B096 | 18 November 1982 | LER 82-045/01T-0:on 821109,during Normal Operation,Diesel Generator D-3 Tripped on Low Cooling Water Pressure.Caused by Bad Low Cooling Water Pressure Switch.Switch Replaced | |
| ML20028A116 | 9 November 1982 | LER 82-042/01T-0:on 821027,excessive Water Found Leaking from Recirculation Pump Seal 3B.Caused by Recirculation Pump Seal Failure.Unit Manually Brought Down.Seals Replaced. Supplementary LER to Be Issued When Cause of Failure Known | |
| ML20028A718 | 4 November 1982 | LER 82-040/03L-0:on 821019,upscale Trip Point of Channel B Refuel Floor Area Radiation monitor,3-1705-8B,found at 130 Mrem/H.Caused by Instrument Set Point Drift.Monitor Reset to Trip at 90 Mrem/H | |
| ML20052G591 | 3 May 1982 | LER 82-018/03L-0:on 820414,closure Time of Nitrogen Inerting Stop Valve 3-1601-55 Exceeded Tech Spec Limit of 15-s.Caused by Failure of Asco Solenoid to Permit Normal bleed-off of Air Supply & Close Valve.Solenoid Replaced | |
| ML20052E419 | 3 May 1982 | LER 82-011/03L-0:on 820403,LPCI Differential Pressure Switch 2-261-34B Declared Inoperable During Monthly Surveillance Test Dis 1500-9.Caused by Wear of Contact Point in Mechanical Linkage.Switch Adjusted | |
| ML20052E636 | 28 April 1982 | LER 82-012/03L-0:on 820407,during Semiannual QA Audit,No Info Found to Verify Instrument Check Surveillance of Temp Detectors for Safety/Relief Valves.Caused by Failure to Include Requirement Change in Tech Spec Procedures | |
| ML20052E437 | 28 April 1982 | LER 82-017/03L-0:on 820407,cracked Weld Discovered on Test Tap of Condensate Booster Recirculation Line.All Leakage Contained in Turbine Bldg Floor Sumps.Cause Not Stated.Tap Cut & Capped | |
| ML20052E882 | 27 April 1982 | LER 82-019/01T-0:on 820417,while Conducting ASME Class I Hydrostatic Test During Shutdown,Water Discovered Leaking from LPCI Check Valve 3/4-inch Test Equalizing Line.Caused by Inadequate Piping Support | Hydrostatic |
| ML20052E476 | 27 April 1982 | LER 82-013/03L-0:on 820402,LPCI Differential Pressure Switch 2-261-35B Failed to Operate on Increasing Differential Pressure.Caused by Contact Point Wear in Mechanical Linkage. Pressure Switch Adjusted | |
| ML20052C424 | 23 April 1982 | LER 82-016/03L-0:on 820329,during Refueling Outage Mechanical Snubber 23 on Reactor Water Cleanup Sys Found Inoperable.Caused by Overloading Snubber During One Time Event.Snubber Replaced W/Hydraulic Snubber HSSA-10 | |
| ML20052G690 | 22 April 1982 | Corrected LER 82-010/03L-0:on 820325,pilot Cell Voltage Readings Not Taken for 24/48,125 or 250-volt Dc Batteries Per Tech Specs.Caused by Broken Fluke Voltmeter.Event to Be Reviewed W/Shift Supervisors | |
| ML20052E473 | 22 April 1982 | Updated LER 80-048/03X-2:on 801223,while Testing Group 2 & 3 Isolation Circuitry,Shutdown Cooling Sys Inboard Isolation Valve Did Not Close.Caused by Dirt Buildup on Valve Stem. Thermal Overloads Adjusted & Reset | Time of Discovery |
| ML20052B412 | 20 April 1982 | LER 82-010/03L-0:on 820325,while Unit 2 Was in Normal Operation & Unit 3 in Refuel,Pilot Cell Voltage Readings Were Not Taken for Units 2 & 3 Dc Batteries.Caused by Operator Error | |
| ML20052E719 | 17 April 1982 | Updated LER 82-002/03X-1:on 820107,during Refueling Outage, Outboard MSIVs 3-203-2B & 3-203-2D Showed Leakages at Rates in Excess of Tech Specs.Caused by Packing Leakage.Valve Stem leak-off Lines Isolated & Packing Tightened | |
| ML20052E485 | 1 April 1982 | Updated LER 81-026/03X-1:on 810915,during Shutdown Process, Rod P-10 Showed Wrong Position on Rod Worth Minimizer.Caused by Diode Failure Resulting in Multiple Output Distributor Error Forcing Rod Block to Occur.Five Diodes Replaced | |
| ML20050D477 | 30 March 1982 | LER 82-014/03L-0:on 820317,crack Discovered in Head Seal Leak Detection Piping.Cause Undetermined.Leakage Located in Section of Pipe That Cannot Be Isolated.Analysis & Repairs to Be Done Following Cavity Drain Down | |
| ML20042A594 | 9 March 1982 | LER 82-007/03L-0:on 820213,during Routine Surveillance of Reactor Level Switch LIS 2-263-58B,setpoint Found to Be Above Tech Spec Limit.Caused by Instrument Setpoint Drift. Switch Adjusted | |
| ML20042A754 | 8 March 1982 | LER 82-006/03L-0:on 820210,ATWS Div II High Pressure Transmitter 2-263-20D,read Offscale High & Tripped Light on Panel 2202-70B.Caused by Faulty Capacitor in Amplifier Circuit Board.Amplifier Circuit Board Replaced | |
| ML20041E681 | 3 March 1982 | LER 82-012/03L-0:on 820204,drywell & Torus Purge Sys Valve 3-1601-21 Found to Leak.Caused by Failure of Resilient Seating Matl to Maintain Proper Seal to Valve Butterfly Disc.Valve Will Be Replaced | |
| ML20041E748 | 2 March 1982 | LER 82-011/03L-0:on 820203,during Performance of Leak Tests Per Dts 1600-1,leakage Rate of 284.84 Scfh Observed on HPCI Turbine Exhaust Check Valve 3-2301-45.Cause Not Determined. Valve Repaired & Vol Retested | |
| ML20041E621 | 2 March 1982 | LER 82-013/03L-0:on 820204,during Refueling Outage,Nitrogen Inerting Makeup Sys Supplying Nitrogen to Drywell Found to Leak at Rate of 80.39 Scfh.Caused by External Damage to Pressure Valve RV-3-8526.Valve Will Be Replaced | |
| ML20042A650 | 25 February 1982 | Updated LER 81-033/01X-1:on 810602,while Blowing Down HPCI Steam Supply Line W/Hpci Turbine on Turning Gear,Auxiliary Oil Pump Tripped & Motor Was Burned.Caused by Loose Stator Winding.Motor Rewound | |
| ML20042C518 | 25 February 1982 | Updated LER 81-025/01X-1:on 810914,during Automatic Depressurization Sys Valve Operability Surveillance,B Electromatic Relief Valve Failed to Open at Rated Pressure. Caused by Excessive Leakage on Threads | |
| ML20049H780 | 23 February 1982 | LER 82-008/03L-0:on 820126,HPCI Temp Switches 2371A,2372A, 2373B,2370C & 2370D Were Above Tech Spec Limits.Caused by Misaligned Microswitch Due to Loose Screws Which Enlarged Gap Between Actuator & Switch Plunger | |
| ML20049H693 | 23 February 1982 | LER 82-003/03L-0:on 820127,leak of Over 1% Detected Through Charcoal Filters in B Standby Gas Treatment Sys.Caused by Improper Packing of Charcoal Canisters.Charcoal Beds Replaced | |
| ML20049H657 | 23 February 1982 | LER 82-005/03L-0:on 820130,during Single Control Rod Scram Testing,Crd H-10 Failed to Scram.When Solenoid Fuses Pulled,Crd Failed to Scram.Caused by Sticking Scram Pilot Solenoid Valve.Both Valves Replaced & Tested | |
| ML20049H609 | 23 February 1982 | LER 82-004/03L-0:on 820127,after Filling Floor Drain Sample Tank A,Ci Content Found Above Tech Spec.Caused by Failure of Conductivity Recorder in Radwaste Control Room to Indicate That Carryover Was Occurring |