Pages that link to "05000306/LER-2003-001, Exceeded Tech Spec Completion Time"
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The following pages link to 05000306/LER-2003-001, Exceeded Tech Spec Completion Time:
Displayed 6 items.
- 05000306/LER-2003-001 (redirect page) (← links)
- 05000306/LER-2001-005 (← links)
- 05000306/LER-2001-004 (← links)
- 05000306/LER-2001-003 (← links)
- 05000306/LER-2001-002 (← links)
- 05000306/LER-2001-001 (← links)
- 05000306/LER-1982-009, Forwards LER 82-009/03L-0 (← links)
- 05000306/LER-1982-027, Forwards LER 82-027/03L-0 (← links)
- 05000306/LER-1982-014, Forwards LER 82-014/03L-0 (← links)
- 05000306/LER-1982-013, Forwards LER 82-013/03L-0 (← links)
- 05000306/LER-1982-010, Forwards LER 82-010/01T-0 (← links)
- 05000306/LER-1978-017, Forwards LER 78-017/03L-0 (← links)
- 05000306/LER-1978-019, Forwards LER 78-019/03L-0 (← links)
- 05000306/LER-1982-012, Forwards LER 82-012/03L-0 (← links)
- 05000306/LER-1982-017, Forwards LER 82-017/03L-0 (← links)
- 05000306/LER-1983-002, Forwards LER 83-002/03L-0 (← links)
- 05000306/LER-1995-003, Forwards LER 95-003 Re Unplanned auto-start of AFW Pump Due to Faulty Adjustment of Circuit Breaker Cell Switch.Maint Procedure Will Be Revised to Include Taking Off Switch Cover & Performing Visual Insp of Contact Wipe (← links)
- 05000306/LER-1995-002, Forwards LER 95-002 Re Rt While Subcritical Caused by Personnel Error (← links)
- 05000306/LER-1978-024, Forwards LER 78-024/03L-0 (← links)
- 05000306/LER-1983-004, Forwards LER 83-004/03L-0 (← links)
- 05000306/LER-1997-001, Forwards LER 97-001-00 Re Transport of Heavy Load Over Irradiated Fuel or Safe SD Equipment W/O Establishing Required Conditions.Event Reported Via Emergency Emergency Notification Sys IAW 10CFR50.72 on 970207 (← links)
- 05000306/LER-1998-006, Forwards LER 98-006-00 Re Unplanned Actuation of ESF Equipment During Performance of Sp Due to Personnel Error. Event Was Reported Via ENS IAW 10CFR50.72 on 981219.Two New Commitments Are Indicated as C/A Statements (← links)
- 05000306/LER-1997-005, Forwards LER 97-005-00 Re Sudden Pressure Lockout of Number 10 Transformer Which Resulted in Auto Load Rejection/ Restoration on SR Bus on 971117 (← links)
- 05000306/LER-1998-001, Forwards LER 98-001-00 Re Lockout of 10 Transformer Resulting in Auto Load Rejection/Restoration on Safety Related Bus.Event Reported Via Emergency Notification Sys in Accordance w/10CFR50.72 on 980121 (← links)
- 05000306/LER-1997-004, Forwards LER 97-004-00 Re Plant Shutdown Due to Greater than Allowable Leakage from Maint Airlock Per Ts.Commitment Made by Util Listed (← links)
- 05000306/LER-1998-003, Forwards LER 98-003-00 Re Inadequate App R Fire Barriers & Unsealed Fire Barrier Penetrations.Licensee Made Four New Commitments,Indicated as Corrective Action Statements in Italics (← links)
- 05000306/LER-2024-001-01, Reactor Trip and Auto-Start Actuation of Auxiliary Feedwater Due to Loss of Suction to the 22 Main Feedwater Pump (← links)
- 05000306/LER-2024-001, Reactor Trip and Auto-Start Actuation of Auxiliary Feedwater Due to Loss of Suction to the 22 Main Feedwater Pump (← links)
- 05000306/LER-2023-001, Gt/Xfmr Lockout Due to Failure of Lightning Arrester Caused Unit 2 Reactor Trip (← links)
- 05000306/LER-2021-001, Turbine Driven Auxiliary Feedwater Pump Actuation Signal Due to Procedure Error (← links)
- 05000306/LER-1998-003-02, :on 980526,discovered Inadequate App R Fire Barriers & Unsealed Fire Barrier Penetrations.Caused by Lack of Adequate Separation of Safe Shutdown Equipment.Firewatch Has Been Established as Compensatory Measure (← links)
- 05000306/LER-1998-002, :on 980201,defect in Primary Sys Pressure Boundary Was Observed on Motor Tube Base of Part Length CRDM Housing.Caused by Flaw on G9 Part Length Crdm.Unit 2 Part Length CRDMs Have Been Removed & Replaced (← links)
- 05000306/LER-1998-002-01, Forwards LER 98-002-01,re Defect in Primary Sys Pressure Boundary Observed on Motor Tube Base of Part Length CRDM Housing.Commitments Made within Ltr,Encl (← links)
- 05000306/LER-1989-002-01, :on 890526,unit Tripped on Steam Generator Low Level.Caused by Failure of Electrolytic Capacitor & Inductor.Speed Error Amplifier Card Replaced & Insp of All Other Circuit Cards Completed (← links)
- 05000306/LER-1986-005-02, :on 861103,turbine Bldg Sump Continuous Composite Sampler Showed Closed Isolation Valve.Caused When Valve Closed Mistakenly as Discharge Path Switched from River to Landlocked Drainage.Valves Tagged (← links)
- 05000306/LER-1986-004, :on 860801,electrician Opened Switch for Circuit 2 on Dc Panel 21 to Isolate Ground to Single Circuit,Causing Auxiliary Feedwater Pump to Start.Caused by Personnel Error.Personnel Counseled (← links)
- 05000306/LER-1986-004-02, :on 860801,during Investigation of Ground on Station Battery 21,motor-driven Auxiliary Feedwater Pump Started.Caused by Personnel Error.Event Discussed W/Involved Personnel (← links)
- 05000306/LER-1997-004-02, :on 970926,determined That Maint Airlock Volumetric Test Exceeded TS 4.4 Required Limit.Caused by Misalignment of Operating Mechanism Shafts W/Shaft Seal Housings.Reduced Shaft Seal Leakages & Revised Procedure (← links)
- 05000306/LER-1986-001-02, :on 860519,reactor Trip & Safety Injection Occurred.Caused by Inadvertent Release of Test Button During Safeguards Logic Testing.Event Discussed W/Involved Technician & Procedure Under Review (← links)
- 05000306/LER-1999-001-01, :on 990206,TS Required Reactor Protection Logic Test Was Missed.Caused by Personnel Error.Sd Banks Were Inserted at 0544,RT Breakers Were Opened & Test Was Performed.With (← links)
- 05000306/LER-1998-005-02, :on 981109,RT from 22% Power During Planned SD Operation Was Noted.Caused by Tt.Fw Heater Drain Level Control Was Thoroughly Inspected & Calibrated.With (← links)
- 05000306/LER-1986-002-02, :on 860520,unit Restarted from 860519 Trip on High Steam Generator Level.Caused by Failure of Feedwater Control Sys & Sluggish Response of Steam Generator Level Transmitters (← links)
- 05000306/LER-1986-003-02, :on 860728,unit Tripped & All Train a Safeguards Equipment Actuated During Check of Test Lights on Safeguards Test Panel.Caused by Mistakenly Resetting Train a Safety Injection (← links)
- 05000306/LER-1998-001-01, :on 980121,10 Transformers Were Locked Out. Caused by Cognitive Error by Sys Engineer Writing Work Order to Isolate Breaker 1H3.Revised Procedures (← links)
- 05000306/LER-1998-006-01, :on 981219,unplanned Actuation of ESF Equipment During Performance of Sp.Caused by Personnel Error.Control Room Took Prompt Action & Returned Plant to Proper Status & Second pre-job Briefing for SP-2126 Was Conducted (← links)
- 05000306/LER-1997-005-02, :on 971117,sudden Pressure Lockout of Number 10 Transformer Resulted in Auto Load Rejection/Restoration on SR Bus.Caused by Transformer Being Taken Oos.Replaced 10 Transformer Sudden Transformer Relay 63T10 (← links)
- 05000306/LER-1998-002-02, Forwards LER 98-002-02 Re Defect in Primary Sys Pressure Boundary.Encl LER Documents Closure of Event with Respect to Prairie Island,Unit 1 (← links)
- 05000306/LER-1988-001-02, :on 880921,airlock Seal Test Not Performed within Required Time.Caused by Personnel Error.Importance of Adequately Reviewing Containment Entry Logs During Airlock Test Procedure Emphasized (← links)
- 05000306/LER-1998-004-01, :on 980910,shield Building Integrity Was Breached.Caused by Inadequate TS Change.Revised Affected Procedures.With (← links)
- 05000306/LER-1997-001-01, :on 970207,heavy Load Transported Over Irradiated Fuel or Safe SD Equipment W/O Establishing Required Conditions.Caused by Failure to Follow D58.Movement of 22 RCP Placed on Hold Until Procedures Revised (← links)
- 05000306/LER-1997-003-01, :on 970517,Unit 2 Was Brought to Planned Hot Shutdown Condition to Perform Valve Maint in 22 RCP Containment Vault.Caused by Inattention to Detail.Will Evaluate Revising Plant Operating Procedures (← links)
- 05000306/LER-1997-002-02, :on 970318,discharge Valves to RCS Cold Legs Were Closed When RCS Was Above Shutdown Because of Administrative Error.Training Was Provided on Intent of Motherhood Clause to Operations Staff (← links)
- 05000306/LER-1985-003-02, :on 850808,turbine Overspeed Trip Test Overdue. Caused by Personnel Error in Scheduling Turbine Tests.Test Conducted Upon Discovery of Error on 850810 (← links)
- 05000306/LER-1996-003-02, :on 961205,auto-start of 21 Component Cooling Water Pump Occurred Due to Personnel error.MV-32122 Was Immediately Reopened & 21 CC Pump Subsequently Shutdown & MV-32160 Closed (← links)
- 05000306/LER-1996-004-02, :on 961206,failure to Perform SP-2244,cycling of Unit 2 Containment Air Sample Valves Occurred.Caused by Personnel Error.Surveillance Has Already Been Performed in Both 3rd & 4th Quarters (← links)
- 05000306/LER-1993-001, :on 930104,auto-start of CCW Pump Occurred Due to Inadequate Procedures.Operator Completed Transfer of RHR to Alternate Train Per Procedures.Procedures Revised.W/ (← links)
- 05000306/LER-1985-002-02, :on 850218,diesel Cooling Water Pump 12 Control Switch Mistakenly Put in Manual.Cause Not Stated.Switch Returned to Automatic (← links)
- 05000306/LER-1992-004-02, :on 921125,electrician & Foreman Missed Steps While Connecting New auto-start Circuitry to DG D5,resulting in Unplanned auto-start of Dg.Caused by Unclear Communication.Meeting Held to Discuss Incident (← links)
- 05000306/LER-1983-017-03, /03L-0:on 830712,during Surveillance Test, Containment Air Sample Inlet Isolation Valve CV-31642 Failed to Fully Close on Demand.Caused by Inaccuracy in Maintaining Hard Valve Seats (← links)
- 05000306/LER-1983-024-03, /03L-0:on 831004 & 08,steam Flow Transmitter Failed Low.Cause Unknown.Transmitter Returned to Normal During Troubleshooting.Unit Replaced W/Rosemount Model 1153HD6 Transmitter (← links)
- 05000306/LER-1983-025-03, /03L-0:on 831011,containment Air Sample Inlet Isolation Valve CV-31642 Failed to Fully Close,Per Tech Spec 3.6.A.6.Caused by Loose Set Screw in Switch Actuator Arm & Poor Contact W/Valve Switch.Screw Tightened (← links)
- 05000306/LER-1983-006-03, /03L-0:on 830408,during Surveillance Test,Relay for motor-driven Auxiliary Feedwater Pump 21 on lo-lo Level in Steam Generator 21 Failed.Caused by Relay Coil Failure. Coil Replaced (← links)
- 05000306/LER-1992-002, :on 920220,interruption of One Train of Residual Heat Removal During Unit 2 RCS Draining Operation Occurred.Procedure D2 Did Not Provide Adequate Guidance. Procedure D2.3 Written for one-time Use (← links)
- 05000306/LER-1996-002-02, :on 960418,reactor Trip Occurred.Caused by Failure of 122 Air Dryer Purge Exhaust to Close.Valves Were Inspected (← links)
- 05000306/LER-1985-001-02, :on 850220,while Recirculating Caustic Standpipe,Valve Left Open,Causing Loss of Level to Below Tech Spec Limit.Valve Closed & Level Restored (← links)
- 05000306/LER-1984-003-02, :on 841122,caustic Standpipe Level Below Tech Spec Limit.Caused by Leakage Through Overflow Valve. Valve Tightened to Isolate Leak (← links)
- 05000306/LER-1984-002-02, :on 840928,two Pressurizer Transmitters Found Out of Spec.Cause Not Stated.Unit 1 Transmitters Being Checked.Supplemental Rept Will Be Submitted (← links)
- 05000306/LER-1996-001-01, :on 960319,RT Occurred Due to Failure of FW Regulating valve.CV-31136 Was Stroked to Confirm That Existing Condition Matched Original Calibr Data (← links)
- 05000306/LER-1992-003-03, :on 920326,auto Start of Motor Driven Auxiliary Feedwater Pump Occurred.Caused by Personnel Error.Procedures Changed to Specify Pump Numbers (← links)
- 05000306/LER-1992-002-01, :on 920220,interruption of One Train of RHR Occurred During RCS Draining Operation.Caused by Inadequate Supervisory Methods.Pressurizer Manway Removed to Vent RCS & Emergency Procedure 2E-4 Changed (← links)
- 05000306/LER-1992-001-02, :on 920218,leakage Noted Past Msivs,Causing Cooldown of Rcs.On 920219,motor-driven Auxiliary Feedwater Pump 21 Started Automatically.Caused by Personnel Error. Test Procedures Revised & Event Reviewed (← links)
- 05000306/LER-1995-004-02, :on 950907,lockout of 2RY Transformer Resulted in auto-start of Number 22 CCW Pump.Caused by Ground Fault on B Phase Substation Terminal of Feeder Cable from 2RSY Transformer.Replaced All Substation Potheads (← links)
- 05000306/LER-1984-001-01, :on 840618,during Safeguards Logic Test,Logic for Opening Safety Injection Suction Valves from Refueling Water Storage Tank Satisfied.Open Valves Immediately Closed. Procedures Revised to Prevent Recurrence (← links)
- 05000306/LER-1983-014-01, /01T-0:on 830613,containment Inservice Purge Supply Isolation Failed Local Leakage Rate Test.Caused by Dirty Valve Seats.Valve Seats Cleaned.Blind Flanges to Be Installed During Next Outage (← links)
- 05000306/LER-1977-011, :on 770406,cooling Tower Bus CT12 Lost.Caused by Personnel Error.Personnel Erroneously Reinstalled Relay on Bus Tie Breaker CT-BT112 (← links)
- 05000306/LER-1995-003-02, :on 950626,unplanned auto-start of AFW Pump Occurred Due to Faulty Adjustment of Curcuit Breaker Cell Switch.Mechanical Linkage to Cell Switch in Question Adjusted & Visual Checks Made of Contact Wipe (← links)
- 05000306/LER-1995-002-02, :on 950621,RT Occurred While Subcritical Due to Personnel Error.Reviewed Event W/Personnel Involved (← links)
- 05000306/LER-1995-001-02, :on 950512,two MSSVs Found to Lift Outside of TS Tolerance.Lar Submitted to Allow as-found Valve Setpoint Tolerances of +/- 3% (← links)
- 05000306/LER-1978-024-03, /03L-0 on 781226:Loop a Steam Flow Transmitter 2FT-464 Had Drifted Such That High Steam Flow Setpoint Would Have Occurred at 1.07x10 Lb/H.Caused by Instrument Drift in Barton Model 384 Differential Pressure Transmitter (← links)
- 05000306/LER-1983-026-03, /03L-0:on 831021,sodium Hydroxide Concentration of 11.5% in Spray Additive Tank Exceeded Tech Spec Limit of 11%.Caused by Inadequate Mixing for Design Change.Tank Refilled.Solution Diluted & Recirculated (← links)
- 05000306/LER-1983-020-03, /03L-0:on 830829,maint Air Lock Door Exhibited Leakage of 21,000 Sccm Exceeding Tech Spec Limit.Caused by Deterioration of Grafoil Packing at Inboard Shaft Seals. Packing Will Be Replaced Prior to Startup (← links)
- 05000306/LER-1994-003-02, :on 941025,auto-start of Train of Absvs on High Radiation Occurred During Restoration of Seal Water Return Filter Due to Inadequate Procedure.Procedures Will Be Revised (← links)
- 05000306/LER-1983-022-03, /03L-0:on 830909,steam Flow Transmitter Found Out of Calibr Low by 1%.Cause Unknown.Transmitter Returned to Vendor for Analysis.Rosemount Model 1153HA6 Differential Pressure Transmitter Replaced (← links)
- 05000306/LER-1994-004-02, :on 941220,discovered That CWS Snubber Was Not Tested as Required.Caused by Oversight by Project Engineer. Removed Snubber for Further Testing & Installed Replacement Snubber (← links)
- 05000306/LER-1983-016-03, /03L-0:on 830627,during Power Operation, Containment Vacuum Breaker Isolation Valve CV-31628 Failed to Close on Demand.Caused by Diaphragm Failure in Quick Exhaust Valve.Valve Replaced (← links)
- 05000306/LER-1991-001-02, :on 910327,discovery That Particular Piping Insp Not Being Made in Accordance W/Asme Section Xi.Caused by Personnel Error.Procedure for ASME Section XI Revised & Work Request Written (← links)
- 05000306/LER-1983-004-03, /03L-0:on 830303,during Surveillance Testing, Excessive Leakage from Maint Airlock Measured.Caused by Deterioration of Grafoil Packing at Outboard Upper Shaft Seal.Packing Tightened (← links)
- 05000306/LER-1994-002-02, :on 940721,turbine-generator Trip/Reactor Trip Occurred Due to Failure of Wet Pipe Sprinkler Head.Unit Stabilized Using Normal Operating Procedures & Failed Sprinkler Head & Riser Removed for Evaluation (← links)
- 05000306/LER-1983-009-03, /03L-0:on 830416,spike Occurred in RCS Activity Up to 3.26 Uci/Gm Dose Equivalent I-131.Caused by Washout of Fission Products from Fuel Pin Defects Following Reactor Shutdown & RCS Cooldown & Depressurization (← links)
- 05000306/LER-1982-017-03, /03L-0:on 820908,two Undervoltage Relays Found to Trip Outside Tolerance Band of 90 Plus or Minus 2% of Nominal Voltage.Cause Not Stated.Relays Recalibr (← links)
- 05000306/LER-1983-002-03, /03L-0:on 830216,control Switches for Heat Trace Circuits ET2R & ET47R Found in Off Position.Caused by Personnel Error.Switches Returned to Automatic Position (← links)
- 05000306/LER-1990-010-02, :on 901023,inadvertent Operation of Safeguards Logic Train Pushbutton Occurred (← links)
- 05000306/LER-1990-011-02, :on 901009,entrance Into Tech Spec 3.0.C During AMSAC post-installation Testing Occurred (← links)
- 05000306/LER-1990-009-02, :on 901007,technician Inadvertently Removed Fuses from Intermediate Range Channel Instead of Power Range Channel (← links)
- 05000306/LER-1990-005-02, :on 900910,turbine-driven Auxiliary Feedwater Pump Started Automatically Due to Personnel Oversight.W/ (← links)
- 05000306/LER-1990-003, :on 900316,reactor Trip Occurred Following Resetting of Rod Control Sys Urgent Failure Alarm.Caused by Personnel Error.Temporary Operating Instructions Issued to Not Reset Alarms Until Consulting W/I&C Dept (← links)
- 05000306/LER-1982-027-03, /03L-0:on 821208,containment Vacuum Breaker Isolation Valve Inoperable for Approx 8 H When Air Supply Line Disconnected from Tubing Fitting.No Defects in Mfg or Installation of Fitting Detected.Fitting Repaired (← links)
- 05000306/LER-1990-004-02, :on 900905,automatic Start of Both Auxiliary Feedwater Pumps Occurred.Caused by Inadequately Reviewed Procedures.Work Control Process Reviewed & Personnel Counseled (← links)
- 05000306/LER-1982-014-03, /03L-0:on 820725,during Startup Operations, Flux Difference of Two ex-core Channels Deviated from Target Band for Greater than 15 Minutes.Caused by Personnel Error. Personnel Will Review Rept (← links)
- 05000306/LER-1982-013-03, /03L-0:on 820719,pressurizer Steam Space Sample Isolation valve,CV-31303,would Not Close on Demand.Cause Unknown.Valve Inaccessible During Operation.Repairs Will Be Made During Shutdown.Manual Valve in Penetration Closed (← links)
- 05000306/LER-1982-010-01, /01T-0:on 820618,during Local Leakage Rate Testing at Refueling,One Containment Purge Supply Valve Leaked in Excess at Tech Specs.Cause Not Stated.Blind Flanges Will Be Installed on Containment Purge Penetrations (← links)
- 05000306/LER-1993-004-02, :on 931124,breach Found in Unit 2 Containment Boundary During Fuel Handling Due to Personnel Errors & Procedural Inadequacies.Containment Boundary Control Procedure Will Be Revised (← links)
- 05000306/LER-1978-022-03, /03L-0 on 781128:during Surveillance Test,Valve Packing Leakage from CV-31239, 22 RHR Heat Exchanger Outlet Valve Was About 7 Gal/Hr,Due to Deteriorated Valve Packing (← links)
- 05000306/LER-1978-022, Forwards LER 78-022/03L-0 (← links)
- 05000306/LER-1978-021-01, /01T-0 on 781128:during Refueling Local Leak Rate Testing Revealed Leakage in Excess of Tech Specs Limits Thru Valves in Penetrations 25A & 25B.Cause & Corrective Action Will Be Given in Update Rept (← links)
- 05000306/LER-1978-021, Forwards LER 78-021/01T-0 (← links)
- 05000306/LER-1990-008-02, :on 900923,auto-start of Component Cooling Water Pump 2 Occurred While Switching RHR Pumps (← links)
- 05000306/LER-1978-017-03, /03L-0:on 780815,during Surveillance Test,Channel 1 of Low Pressurizer Tripped Below 1,815 Psig & Channel 1 of 10/10 Steam Line Pressure Tripped Below 500 Psig.Caused by Instrument Drift (← links)
- 05000306/LER-1978-019-03, /03L-0:on 780915,during Investigation of Maint on Nis power-range Channel 2N41,channel Failed.Channel Taken Out of Svc within 3 Minutes.Caused by Failure of 25-volt Power Supply.Power Supply Replaced (← links)
- 05000306/LER-1990-006-02, :on 900912,excessive Leakage Through Containment Isolation Valve Due to Valve Malfunction Occurred.Caused by Inadequate Work Instructions.Valve Travel Stop Adjusted (← links)
- 05000306/LER-1993-003-02, :on 930719,both Trains of Ventilation Safeguards Electrical Equipment Secured for Hours Due to Inadequate Administrative Control.Review of DGs D5/D6 Design Repts Will Be Performed (← links)
- 05000306/LER-1982-012-03, /03L-0:on 820702,radiation Monitor Sample Return Isolation Valve Gave Dual (Open/Closed) Indication.Cause Not Determined.Valves Will Be Cycled Periodically (← links)
- 05000306/LER-1982-009-03, /03L-0:on 820505,during Surveillance Testing of SI Pump 22,test Isolation Valve Found Closed.Caused by Improper Restoration of Sys After Maint.Design Change Initiated (← links)
- 05000306/LER-1982-004-03, /03L-0:on 820226,maint Workman Accidentally Bumped Overspeed Trip Mechanism on Auxiliary Feedwater Pump, Tripping Valve & Making Pump Inoperable.Caused by Personnel Error.Valve Operator Reset (← links)
- 05000306/LER-1982-004, Forwards LER 82-004/03L-0 (← links)
- 05000306/LER-1982-002-03, /03L-0:on 820125,one Overpower Delta T Summing Unit Found Out of Spec High.Caused by Instrument Drift. Device Recalibr (← links)
- 05000306/LER-1982-002, Forwards LER 82-002/03L-0 (← links)
- 05000306/LER-1993-002-02, :on 930403,containment Isolation Valve Which Controls Reactor Makeup Water to Containment Exceeded Max Time for Closure.On 930413,lockwire & Safety Tag Removed. Caused by Communication Errors.Safety Tag Process Reviewed (← links)
- 05000306/LER-1993-002, Forwards LER 93-002-00 Re Loss of Administrative Control of Inoperable Containment Isolation Valve Due to Personnel Error.Process for Use of Safety Tags Being Reviewed & Revs Will Be Made,Where Needed (← links)
- 05000306/LER-1981-030-03, During Testing,Degraded Voltage Relay 27A1/B25 Found W/Voltage Setpoint Outside Allowable Band.Exact Cause Unknown.Relays Recalibr & Found to Operate Correctly (← links)
- 05000306/LER-1981-030, Forwards LER 81-030/03L-0 (← links)
- 05000306/LER-1981-028-03, /03L-0:on 811118 & 1218,bistables 2-PC-431 G & I Found Out of Tolerance.Caused by Defective Potentiometer on 811118.On 811218,leads Were Tightened,Correcting Problem (← links)
- 05000306/LER-1981-028, Forwards LER 81-028/03L-0 (← links)
- 05000306/LER-1990-002-01, :on 900309,reactor Trip Occurred During Startup.Caused by Failed Reactor Protection Logic Relay. Failed Relays Replaced & Blown Fuse Replaced (← links)
- 05000306/LER-1990-001-01, :on 900308,relay Failed to Operate Properly During Bus Duct Cooler Local Panel Test.Caused by Failure of Test relay.On-line Testing of Bus Duct Cooler Local Panel Discontinued.Value of on-line Testing Studied (← links)
- 05000306/LER-1981-025-01, /01T-0:on 811029,during Test,Containment Purge Supply Penetration Leaked in Excess of Test Equipment Capacity.Probably Caused by Deformed Seating Matl,Small Dirt Accumulations on Valve Seats or Bolt Movement (← links)
- 05000306/LER-1981-025, Forwards LER 81-025/01T-0 (← links)
- 05000306/LER-1981-016-03, /03L-0:on 810925,diesel Cooling Water Pump Indicator Light Revealed Loss of Power to Pump.Probably Caused by Personnel Error in Not Adequately Reattaching Lifted Wire.Wire Reattached (← links)
- 05000306/LER-1981-016, Forwards LER 81-016/03L-0 (← links)
- 05000306/LER-1994-001-02, :on 940412,discovered That Total Pressure Offset Constant in Error.Caused by Technician Error. Procedure Will Be Revised to Prevent Recurrence (← links)
- 05000306/LER-1990-012-02, :on 901229,control Room Operators Received Annunciation of Reactor Trip.Caused by Rod Control Sys Failures.Failed Cards in Rod Control Sys Replaced (← links)
- 05000306/LER-1982-025, Signed LER 82-025/03L-0:on 821130,during Power Reduction,One Steam Flow Channel Differed from Redundant Channels. Transmitter Showed Out of Calibr.Cause Unknown.Transmitter Recalibr.Bistables Placed in Trip During Recalibr (← links)
- 05000306/LER-1982-025-03, /03L-0:on 821130,one Steam Flow Channel Differed from Redundant Channels During Power Reduction Due to out- of-calibr Transmitter.Cause Not Known.Transmitter Recalibr & Returned to Svc.Transmitter to Be Replaced If Drift Rec (← links)
- 05000306/LER-1982-024-03, /03L-0:on 821123,diesel Generator D1 Inoperable for Approx 4 Minutes After Lockout of Engine Shutdown Circuit Occurred.Probably Caused by Sticky Action of Speed Switch.Further Exam of Circuitry Will Be Performed (← links)
- 05000306/LER-1982-024, Forwards LER 82-024/03L-0 (← links)
- 05000306/LER-1989-004, :on 891221,reactor Trips & Loss of Power to Reactor Coolant Pumps Occurred.Caused by Malfunctions in MG Sets,Rod Control Sys & Substation Breaker Control Sys. Voltage Regulator for MG Set Replaced (← links)
- 05000306/LER-1981-017-03, /03L-0:on 810925,one Steam Pressure Safeguards Actuation Logic Trip Setpoint Was Found to Trip Out of Specs.Caused by Zero Shift in Foxboro Duplex Alarm Unit. Bistable Replaced (← links)
- 05000306/LER-1981-010-03, /03L-0:on 810807,rod Position Indication Channel K7 Found Drifted Low & Declared Inoperable.Cause Undetermined But Probably in Reactor Vessel Head.Repairs Will Be Made at Shutdown (← links)
- 05000306/LER-1981-010, Forwards LER 81-010/03L-0 (← links)
- 05000306/LER-1981-008-01, /01T-0:on 810611,shaft Vibration on Reactor Coolant Pump 21 & Seal 1 Leakoff Flow Increased Beyond Normal Range.Pump Disassembled.On 810706,circumferential Crack Discovered.Cause Not Determined (← links)
- 05000306/LER-1981-008, Forwards LER 81-008/01T-0 (← links)
- 05000306/LER-1989-004-02, :on 891221,unit Tripped & Reactor Coolant Pumps Lost Power.Caused by Faulty Voltage Regulation of One CRD Mechanism motor-generator Set.Regulator for Set Replaced & Tested.On 891226,identical Trip Occurred (← links)
- 05000306/LER-1981-006-03, /03L-0:on 810507,charging Pump 121 Drive Unit Failed.Caused by Bearing Failure in Varidrive Unit.Damaged Parts Replaced (← links)
- 05000306/LER-1981-006, Forwards LER 81-006/03L-0 (← links)
- 05000306/LER-1981-004-03, /03L-0:on 810406,during testing,turbine-driven Auxiliary Feedwater Pump 22 Failed to Come Up to Rated Speed.Caused by Low Governor Setting.Governor Adjusted to Proper Speed (← links)
- 05000306/LER-1981-004, Forwards LER 81-004/03L-0 (← links)
- 05000306/LER-1980-035-03, /03L-0:on 801103,remote/local Control Switch on Containment Spray Pump 21 Found Not in Remote Position. Caused by Contractor Workman Bumping Switch.Switch Returned to Remote Position (← links)
- 05000306/LER-1980-035, Forwards LER 80-035/03L-0 (← links)
- 05000306/LER-2019-001, Cancellation: LER 2019-001-00 for Prairie Island Nuclear Generating Plant, Unit 2, Reactor Coolant Isolation Valve Leakage Results in Condition Prohibited by Technical Specifications (← links)
- 05000306/LER-1981-005-03, /03L-0:on 810423,containment Vacuum Breakers Test Sp 2130 Was Discovered to Not Have Been Performed.Caused by Personnel Oversight.Preheatup Surveillance Test Scheduling Will Be Changed (← links)
- 05000306/LER-1981-005, Forwards LER 81-005/03L-0 (← links)
- 05000306/LER-1981-002-01, /01T-0:on 810301,during Eddy Current Exam of Steam Generator Tubes,Tubes Found Degraded & Defective.Caused by Corrosion &/Or Fretting.Defective Tubes Plugged (← links)
- 05000306/LER-1981-002, Forwards LER 81-002/01T-0 (← links)
- 05000306/LER-1980-034-03, /03L-0:on 801031,auxiliary Bldg Special Vent Exhaust Fan 122 Tripped.Caused by Actuation of Thermal Overload Protective Device.Device Replaced (← links)
- 05000306/LER-1980-034, Forwards LER 80-034/03L-0 (← links)
- 05000306/LER-1980-030-03, /03L-0:on 801008,diesel Generator D2 Tripped on High Crankcase Pressure When Eductor Hose Failed.Caused by Burst Eductor Hose.Hose Replaced on Both Diesel Engines (← links)
- 05000306/LER-1980-030, Forwards LER 80-030/03L-0 (← links)
- 05000306/LER-1980-027-03, /03L-0:on 800919,steam Flow Transmitter 2FT-474 Found Reading Low.Caused by Zero Adjustment Shift in Barton Model 384 Differential Pressure Transmitter. Transmitter Recalibr.Transmitters Scheduled to Be Replaced (← links)
- 05000306/LER-1980-027, Forwards LER 80-027/03L-0 (← links)
- 05000306/LER-1980-032-03, /03L-0:on 801013,during Refueling,Circulating Water Intake Bay Was Drained.Caused by Inoperable Priming Exhauster & Cooling Water Pump 21.Piping Mods Are Being Considered to Allow Maint W/O Effecting Operation (← links)
- 05000306/LER-1980-032, Forwards LER 80-032/03L-0 (← links)
- 05000306/LER-1980-029-03, /03L-0:on 801004,inverter 23 Failed,Leaving Panel 213 de-energized.Caused by Failure of Sola Constant Voltage Transformer.Panel Transferred & Transformer Replaced (← links)
- 05000306/LER-1980-029, Forwards LER 80-029/03L-0 (← links)
- 05000306/LER-1980-028-03, /03L-0:on 801003,previously Acknowledged Annunciator Indicating Fan Coil Unit 24 Was Noticed in Local Control.Caused by Personnel Error.Switch Returned to Remote & Personnel Cautioned to Exercise Care (← links)
- 05000306/LER-1980-028, Forwards LER 80-028/03L-0 (← links)
- 05000306/LER-1980-026-03, /03L-0:on 800916,while Performing Fire Protection Mod Work in Auxiliary Feedwater Pump 22,workman Accidentally Bumped Overspeed Trip Mechanism,Tripping Valve & Making Pump Inoperable for 15 Minutes.Caused by Personnel Error (← links)
- 05000306/LER-1980-026, Forwards LER 80-026/03L-0 (← links)
- 05000306/LER-1980-022-03, /03L-0:on 800805,during Surveillance test,fan-coil Unit Dome Damper 23 Could Not Be Positioned Properly.Caused by Leaking Air Supply Line to Damper Actuator.Air Supply Line Replaced (← links)
- 05000306/LER-1980-022, Forwards LER 80-022/03L-0 (← links)
- 05000306/LER-1989-003-02, :on 891023,measured Leakage Rate Exceeded Tech Specs Limit While Performing Surveillance Test Sp 2136. Caused by Wear of Grafoil Packing Due to High Frequency of Door Usage.Test Procedures Modified (← links)
- 05000306/LER-1980-020-01, /01T-0:on 800715,during Severe Electrical Storm Several Breakers Operated.Main Generator Was Separated from Grid & Reactor & Reactor Coolant Pumps Tripped.Caused by Electrical Storm.Next Day Conditions Returned to Normal (← links)
- 05000306/LER-1980-020, Forwards LER 80-020/01T-0 (← links)
- 05000306/LER-1980-017-03, /03L-0:on 800615,during Normal Operation,Found One Charging Pump Out of Svc.Charge Pump 23 Started & Shut Down.Caused by Air Leaks on Speed Control Unit Due to Broken Packing Ring.Packing Ring Replaced (← links)
- 05000306/LER-1980-017, Forwards LER 80-017/03L-0 (← links)
- 05000306/LER-1980-016-03, /03L-0:on 800529,during Instrument Calibr, Instrument Was Dropped on Trip Throttle Valve Linkage, Tripping Valve & Making Pump Inoperable for 3 Minutes. Caused by Personnel Error (← links)
- 05000306/LER-1980-016, Forwards LER 80-016/03L-0 (← links)
- 05000306/LER-1980-008-03, /03L-0:on 800219,during Startup After Refueling, One Steam Flow Meter on Each Steam Line Did Not Come on Scale.Both Transmitters Drifted Low.Caused by Zero Adjustment Shift in Barton Model 384 Transmitters (← links)
- 05000306/LER-1980-008, Forwards LER 80-008/03L-0 (← links)
- 05000306/LER-1980-013-03, /03L-0:on 800411,while Performing Maint,Workman Accidentally Tripped Overspeed Valve for turbine-driven Auxiliary Feedwater Pump 22.Valve Immediately Reset (← links)
- 05000306/LER-1980-013, Forwards LER 80-013/03L-0 (← links)
- 05000306/LER-1980-011-03, /03L-0:on 800312,motor Breaker of Charging Pump 22 Would Not Stay Closed.Pump Stopped.Caused by Failed Tfk Breaker.Breaker Replaced (← links)
- 05000306/LER-1980-011, Forwards LER 80-011/03L-0 (← links)
- 05000306/LER-1979-001-03, /03L-0 on 790112:during Surveillance Test Found That Instrument 2TM-404V,overpower delta-T Summing Circuit, Had Drifted Due to Drift in Foxbore Model 66RC-OL Summing Unit (← links)
- 05000306/LER-1979-001, Forwards LER 79-001/03L-0 (← links)
- 05000306/LER-1979-002, Has Been Voided (← links)
- 05000306/LER-2024-002, Reactor Trip and Auto-Start Actuation of Auxiliary Feedwater Due to High Negative Neutron Flux Rate Trip (← links)
- 05000306/LER-1979-015-03, /03L-0 on 790504:during Power Operation,Nuclear Power Range Channel 2N43 Failed Low,Due to Loss of High Voltage.Caused by Failure of High Voltage Regulated Source Model UPMD-X54W.Power Supply Replaced (← links)
- 05000306/LER-1979-015, Forwards LER 79-015/03L-0 (← links)
- 05000306/LER-1979-003-03, /03L-0 on 790216:overtemperature Summing Unit 2TM-401B Drifted & Allowed High Trip Pressure.Device Recalibrated.Device Performance Being Evaluated Frequently (← links)
- 05000306/LER-1979-003, Forwards LER 79-003/03L-0 (← links)
- 05000306/LER-1979-029-03, /03L-0:on 791102,during Surveillance Test,Turbine Driven Auxiliary Feedwater Pump Did Not Start.Cause Unknown. Valves Being Checked for Proper Position Every 4-h & Design Change Initiated (← links)
- 05000306/LER-1979-029, Forwards LER 79-029/03L-0 (← links)
- 05000306/LER-1979-016-03, /03L-0 on 790509:during Audit of Surveillance Program,Found That Reactor Vessel Injection Isolation Valve Test Sp 2159 Had Not Been Done.Caused by Failure to Enter Test on Computer Surveillance Schedule (← links)
- 05000306/LER-1979-016, Forwards LER 79-016/03L-0 (← links)
- 05000306/LER-1980-003-01, /01T-0:on 800109,while Conducting Eddy Current Examination of Steam Generator,Row 1 Column Hot Leg Tube Found Defective.Caused by Wearing of Tube Lane Blocking Device Against Tube.Device Modified to Prevent Movement (← links)
- 05000306/LER-1980-003, Forwards LER 80-003/01T-0 (← links)
- 05000306/LER-1979-026-01, /01T-0:on 790919,during Power Reduction Below 90% Power,Axial Flux Difference Left Target Band While Power Was Still Above 90% Power.Caused by Operator Error.Power Reduced to Below 90% & Event Discussed W/Personnel (← links)
- 05000306/LER-1979-026, Forwards LER 79-026/01T-0 (← links)
- 05000306/LER-2018-001-01, Automatic Actuation of Emergency Diesel Generator D5 (← links)
- 05000306/LER-2018-002, RHR Flood Barriers Compensatory Measures (← links)
- 05000306/LER-2018-001, For Prairie Island Nuclear Generating Plant, Unit 2, Automatic Actuation of Emergency Diesel Generator D5 (← links)
- 05000306/LER-1917-003, Regarding Both Containment Spray Pump Control Switches in Pull-Out in Mode 4 (← links)
- 05000306/LER-1917-002, Regarding Reactor Coolant System Shutdown Communication Live Vent Through Wall Defect (← links)
- 05000306/LER-1917-001, Regarding 23 Containment Fan Coil Unit Operability (← links)
- 05000306/LER-2016-001, Regarding Reactor Trip Due to a Ground Fault Resulting in a Generator Trip (← links)
- 05000306/LER-2015-003, Regarding Turbine/Reactor Trip - Low Bearing Oil Pressure (← links)
- 05000306/LER-2015-002, Regarding 21 Feedwater Pump Lockout, Unit 2 Reactor Trip Due to Pressure Switch Failure (← links)
- 05000306/LER-2014-002, Regarding 23 Fan Coil Unit Lower Northeast Face Corner Gasket Leaking (← links)
- 05000306/LER-2014-001, Re Unanalyzed Condition Due to Removal of Multiple Steam Generator Lateral Support Shims and Bumpers (← links)
- 05000306/LER-2012-002, Diesel Generators Inoperable Due to Missing Flood Control Barrier Seal (← links)
- 05000306/LER-2012-001, For Prairie Island Nuclear Generating Plant, Regarding Unit 2 Manual Reactor Trip Due to Feedwater Heater Hi Hi Alarm (← links)
- 05000306/LER-2011-003, Regarding Offsite Power Sources Declared Inoperable as a Consequence of the Loss of the 2RY Transformer Bus Duct (← links)
- 05000306/LER-2011-002, For Prairie Island Nuclear Generating Plant Unit 2, Regarding Unit 2 Trip as a Result of a Weather Related Turbine Trip (← links)
- 05000306/LER-2011-001, Regarding Shield Building Inoperable Due to Maintenance Activity (← links)
- 05000306/LER-2010-003, Regarding Unit 2 Fuel Oil Transfer Pumps Are Vulnerable to a Potential Common Mode Failure (← links)
- 05000306/LER-2010-002, For Prairie Island, Unit 2, Regarding Turbine Shutdown Due to Loss of a Main Feed Water Pump That Resulted in a Reactor Scram (← links)
- 05000306/LER-2010-001, Regarding Unit 2 Turbine Trip During Reactor Shutdown Resulting in a Reactor Scram (← links)
- 05000306/LER-2009-001, LER 2-09-01, Prairie Island Nuclear Generating Plant Unit 2, Clearance Order Renders Opposite Train Emergency Diesel Generator Inoperable (← links)
- 05000306/LER-2008-002, Manual Reactor Trip During Low Power Physics Testing (← links)
- 05000306/LER-2008-001, Unanalyzed Condition Due to Both Trains of Component Cooling Being Susceptible to a Postulated High Energy Line Break (← links)
- 05000306/LER-2007-002, For Prairie Island Nuclear Generating Plant, Unit 2, Emergency Diesel Generator Inoperable Longer than Allowed by Technical Specifications Due to Loose Switch (← links)
- 05000306/LER-2007-001, Re Unit 2 Reactor Trip (← links)
- 05000306/LER-2006-002, Re Event Monitoring Instrument Inoperable Longer than Allowed by Technical Specifications (← links)
- 05000306/LER-2006-001, Regarding Unit 2 Shutdown Required by Technical Specifications Due to Inoperable Emergency Diesel Generator (← links)
- 05000306/LER-2005-003, Regarding Declaring Train of Containment Cooling Operable with One Fan Cooler Isolated Prohibited by Technical Specifications (← links)
- 05000306/LER-2005-002, Praised Island, Unit 2 Regarding Unit 2 Shutdown Required by Technical Specifications Due to Inoperable Emergency Diesel Generator (← links)
- 05000306/LER-2005-001, Re Shutdown Required by Technical Specifications Due to Two Trains of Containment Cooling Inoperable (← links)
- 05000306/LER-2004-001, Re Shutdown Required by Technical Specifications Due to Two Trains of Containment Cooling Inoperable (← links)
- 05000306/LER-2003-002, Automatic Actuation of Unit 2 Emergency AC 4KV Bus 26 Load Sequencer (← links)
- 05000306/LER-2003-001, Exceeded Tech Spec Completion Time (← links)
- ML031410027 (redirect page) (← links)
- 05000282/LER-2003-003, Unauthorized Entry Into a Protected Area (← links)
- 05000306/LER-2003-002, Automatic Actuation of Unit 2 Emergency AC 4KV Bus 26 Load Sequencer (← links)
- 05000282/LER-2003-001, Residual Heat Removal Valve CV-31236 Positioner Linkage Found Broken (← links)
- 05000282/LER-2003-002, Appendix R Safe Shutdown Analysis Issues (← links)