Pages that link to "05000295/LER-1979-001, Has Been Voided"
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The following pages link to 05000295/LER-1979-001, Has Been Voided:
Displayed 50 items.
- 05000304/LER-1979-006-01, Has Been Voided (← links)
- 05000304/LER-1979-001-01, Has Been Voided (← links)
- 05000304/LER-1979-005, Has Been Voided (← links)
- 05000304/LER-1979-003, Has Been Voided (← links)
- 05000295/LER-1979-010, Has Been Voided (← links)
- 05000295/LER-1979-001 (redirect page) (← links)
- 05000295/LER-2007-001 (← links)
- 05000295/LER-1997-007, Forwards LER 97-007-00 Re Automatic Actuation of Esf. Submitted Table Identifies Actions Committed to by Util (← links)
- 05000295/LER-1997-005, Forwards LER 97-005-00 IAW 10CFR50.73(a)(2)(i)(B).Actions Listed (← links)
- 05000295/LER-1997-004, Forwards LER 97-004-00 Re Failure to Start Pump in Required Time & Led to Declaring 1C Containment Spray Pump Inoperable (← links)
- 05000295/LER-1997-002, Forwards LER 97-002-00.Commitments Made by Util Listed (← links)
- 05000295/LER-1978-078, Forwards LER 78-078/01L-0 (← links)
- 05000295/LER-1978-084, Forwards LER 78-084/03L-0 (← links)
- 05000295/LER-1997-012, Forwards LER 97-012-00,which Documents 970423 Event That Occurred at Zion Generating Station.Commitments Made by Util,Listed (← links)
- 05000295/LER-1997-009, Forwards LER 97-009-00 IAW 10CFR50.73(A)(2)(i)(B) Which Requires Listed Corrective Actions (← links)
- 05000295/LER-1997-001, Forwards LER 97-001-00 Which Involved Discovery of Lack of Sump Cover Plate Holes Contrary to Plant Structural Drawing Details,Per 10CFR50.73(a)(2)(ii)(B) (← links)
- 05000295/LER-1978-082, Forwards LER 78-082/03L-0 (← links)
- 05000295/LER-1997-026, Forwards LER 97-026-00,per 10CFR50.73(a)(2)(i)(B) Which Requires 30-day Written Rept.Commitments Associated W/Correspondence,Encl (← links)
- 05000295/LER-1997-025, Forwards LER 97-025-00,re Event Which Occurred at Zion Nuclear Power Station.Commitments Made within Ltr Aslo Encl (← links)
- 05000295/LER-1978-087, Forwards LER 78-087/01T-0 (← links)
- 05000295/LER-1978-088, Forwards LER 78-088/03L-0 (← links)
- 05000295/LER-1978-085, Forwards LER 78-085/03L-0 (← links)
- 05000295/LER-1978-089, Forwards LER 78-089/01T-0 (← links)
- 05000295/LER-1978-086, Forwards LER 78-086/03L-0 (← links)
- 05000295/LER-1997-024, Forwards LER 97-024-00,per 10CFR50.73(a)(2)(i)(B). Commitments Made by Util,Encl (← links)
- 05000295/LER-1997-023, Forwards LER 97-023-00,per 10CFR50.73(a)(2)(ii)(B). Commitments Made by Util,Encl (← links)
- 05000295/LER-1989-008, Forwards LER 89-008-00 Re Room Cooler Svc Water Supply Discrepancy Discovered on 890609 (← links)
- 05000295/LER-1997-020, Forwards LER 97-020-00 Per 10CFR50.73(a)(2)(ii) & 10CFR50.72(b)(2)(i).Util Is Unclear Whether Plant Is within or Outside Design Basis,Therefore Event Assumed Reportable. Commitments Made by Util,Encl (← links)
- 05000295/LER-1997-019, Forwards LER 97-019-00 Re Failure to Test Safety Related Logic Circuits Required by Tech Specs.Attachment a Provides Commitments Associated W/Correspondence (← links)
- 05000295/LER-1985-035, Special Rept Re Failure to Notify NRC of Quarterly Release of Radioactive Matl in Excess of 2.5 Ci Per Unit on 840513. Failure to Submit Rept Documented in LER 85-035-00 & Insp Repts (← links)
- 05000295/LER-1982-023, Forwards LER 82-023/03L-0 (← links)
- 05000295/LER-1982-022, Forwards LER 82-022/03L-0 (← links)
- 05000295/LER-1982-021, Forwards LER 82-021/03L-0 (← links)
- 05000295/LER-1982-020, Forwards LER 82-020/03L-0 (← links)
- 05000295/LER-1989-004-05, :on 890308,all Rod Position Indicators Dropped to Reading of Approx 220 Steps Due to Line Voltage Regulator Failure.All Indicator Channels Declared Inoperable & Operators Prepared to Ramp Unit Down (← links)
- 05000295/LER-1989-013-02, :on 890823,testing of Main Steam Safety Valves Revealed Majority of Valves Had Setpoints Low Outside +/- 1% Tolerance.Caused by Elevated Temps at Work Site.Plant Shut Down on 890826 & Instrumentation Evaluated (← links)
- 05000295/LER-1989-009-04, :on 890620,equipment Attendant at Remote Shutdown Panel Inadvertently Started Auxiliary Feedwater Pump.Caused by Personnel Error.Pump Control Transferred to Main Control Board & Pump Secured (← links)
- 05000295/LER-1989-008-06, :on 890620,inadvertent Start of Auxiliary Feedwater Pump Occurred Due to Distraction in Room.Caused by Personnel Error & Reversal Start/Stop Labeling on Pump Switch.Labeling Corrected (← links)
- 05000295/LER-1989-008-03, :on 890609,identified That Potential Problem Exists Re Svc Water Sys Ability to Supply Both Room Coolers W/Current Piping Configuration.Caused by Design Deficiency. Safety Significance for Subj Room Cooler Being Evaluated (← links)
- 05000295/LER-1988-012-01, :on 880617,determined That 20 Valves Failed 1% Setpoint Pressure Tolerance as Required by Tech Spec Table 4.7-1.Caused by Setpoint Drifting Between Calibr Testing or by Testing Method.Valves Overhauled (← links)
- 05000295/LER-1989-012-02, :on 890723,auxiliary Feedwater Pump Declared Inoperable Due to Failing Trip Test.Caused by Administrative Error Re Plant Interpretation of Applicable Tech Spec.Proper Flow Settings Valved In.Procedure Revised (← links)
- 05000295/LER-1989-007-04, :on 890311,RHR Supply to Train a Containment Spray Header Stop Valve Did Not Fully Open While Performing PT-2B Step A.5.Caused by Boric Aid Buildup on Valve Stem. Valve Stem Cleaned & Lubricated (← links)
- 05000295/LER-1989-011-02, :on 890712,several Containment Isolation Valves Inadvertently Actuated When Test Switch Removed from Test Position.Caused by Personnel Error.Operator Training & Procedure Revised (← links)
- 05000295/LER-1989-006-04, :on 890328,reactor Protection Loop Inoperable & Untripped for More than 2 H.Caused by Personnel Error. Event Discussed W/Appropriate Personnel & 5-day Training Course Attended (← links)
- 05000295/LER-1989-010-03, :on 890711,unmarked Jumper Simulated Open Signal on Turbine Stop Valve,Causing Train a Reactor Trip. Caused by Not Properly Removing test-related Jumper After Testing.Testing Procedures Revised (← links)
- 05000295/LER-1988-006-02, :on 880325,during Review of Procedure 16-88, Noted That Measured Capacity for Two Svc Water Pumps Approx 32,000 Gpm.Caused by Incorrect Assumptions.Procedure Change Written to Prevent Reccurrence (← links)
- 05000295/LER-1989-005-04, :on 890317,fire Door Declared Inoperable & Continuous Fire Watch Not Established within 1 H.Caused by Failure of Shift Engineer to Obtain Personnel for Fire Watch.Station Directive Issued (← links)
- 05000295/LER-1987-016-08, :on 871130,determined That Reactor Containment Fan Cooler Outlet Isolation Valve 1MOV-SW0009 Failed Partially Open & Inoperable.Caused by Insufficient Torque on Valve Block Bolts.Valve Block Design Changed (← links)
- 05000295/LER-1987-014-05, :on 870804,both Redundant Channels of Heat Trace Deenergized on Boric Acid Sys.Caused by Personnel Error & Procedural Deficiency.Em Procedures Will Be Revised & EM Manipulation of Breakers Policy Reviewed (← links)
- 05000295/LER-1987-013-01, :on 870209,Tech Spec Inoperability Time of 72 H Violated.Caused by Discovery of Disconnected Hydraulic Snubber 1RHRS-1129 Due to Personnel Error.Snubber Reconnected & Inspected & Procedure Changed (← links)
- 05000295/LER-1989-003-03, :on 890213,vent Stack Iodine Sample Not Analyzed Due to Damaged Sample Cartridge.Caused by Inadequate Design.Auxiliary Bldg Vent Paths Evaluated for Possible Use in Tech Spec Sampling Requirement (← links)
- 05000295/LER-1987-013-05, :on 870621,outer Door on Containment Personnel Hatch Malfunctioned.Caused by Out of Adjustment Cam & Follower Mechanism.Hatch Outer Door Repaired by Mechanical Maint on 870621 (← links)
- 05000295/LER-1989-002-05, :on 890127,turbine & Reactor Trip Occurred While Troubleshooting Failure of Safeguard Test Light to Light.Caused by Technician Placing Test Leads Across Incorrect Terminal Points.Bulb Replaced (← links)
- 05000295/LER-1987-015-06, :on 870825,RHR Pump 1B Suction Isolation Valve Taken Out of Svc,Open,Making Unit RHR Train B Inoperable. Tech Spec Required Surveillance Not Initiated Until 25 H Later.Caused by Misinterpretation (← links)
- 05000295/LER-1987-003-01, :on 870209,hydraulic Snubber Found Disconnected & Not Declared Inoperable.Caused by Personnel Error.Snubber Reconnected & Maint Procedure Change Initiated (← links)
- 05000295/LER-1997-015-01, :on 970724,Unit 1 EDGs & Unit 2 RHR Sys Was Declared Inoperable Which Resulted in Inadvertent ESF While Performing TS Related Surveillance.Caused by Unclear Expectations.Declared EDG Operable on 970729 (← links)
- 05000295/LER-1997-020-02, :on 970908,identified That Main Steam Instrument Cabling Routed Through Main Steam Tunnels in Contradiction to Ufsar.Cause & Corrective Actions Will Be Submitted in Supplemental LER (← links)
- 05000295/LER-1997-004-01, :on 970221,reactor Was Shutdown,Per LCO 3.6.1 Due to One Inoperable Containment Spray pump.1C CS Pump Day Tank Was Drained,Flushed,Refilled w/biocide-added Fuel from Different Source (← links)
- 05000295/LER-1997-016-02, :on 970905,failed to Recognize That 125 Vdc Buses Were Inoperable During Inter Unit cross-tie.Cause Indeterminate.Corrective Actions Will Provided in Supplemental Response to LER (← links)
- 05000295/LER-1997-018, :on 970806,failure to Recognize 125 Vdc Buses Inoperable During Unit cross-tie Prior to Sept 1996 Calculation.Caused by Inadequate TS Review Process.Revised Procedures Associated W/Station Battery Testing (← links)
- 05000295/LER-1997-018-01, Forwards LER 97-018-01,which Clarifies Info on Event Description,Root Causes & Safety Analysis.Corrective Actions Have Also Been Updated.Commitments Made within Ltr,Encl (← links)
- 05000295/LER-1997-017-01, :on 970806,TS Surveillance on Containment Isolation Valve Operability After Maint Was Missed.Caused by Personnel Error.Procedure Writer Who Failed to Identify Remaining Procedures by 1993 UFSAR Rev Has Been Counseled (← links)
- 05000295/LER-1997-016-01, Forwards LER 97-016-01,which Clarifies Info on Event Description,Root Causes & Safety Analysis.Cas Have Been Updated.Attachment a Provides Commitments Associated W/ Correspondence (← links)
- 05000295/LER-1997-017-02, :on 970806,TS Surveillance on Containment Isolation Valve Operability Was Missed After Maint.Cause Undetermined.Revised & Performed PT-306 for Affected Valves Prior to Units 1 & 2 Reaching Mode 4 (← links)
- 05000295/LER-1997-017, Forwards LER 97-017-00,informing That TS Surveillance Containment Isolation Valve Operability Was Missed After Maint.Commitments Made within Ltr,Encl (← links)
- 05000295/LER-1997-018-02, :on 970806,failed to Recognize 125 Voc Buses Were Inoperable During Unit cross-ties Due to Inadequate TS Revs.Corrective Actions for Event Have Not Been Completed (← links)
- 05000295/LER-1986-037-01, :on 860929,worker Not Assigned to Fire Watch for Day Shift.Caused by Personnel Error.Worker Assigned to Fire Watch & Personnel Involved Spoken to Re Event (← links)
- 05000295/LER-1986-036, :on 860922,discovered That Snubber Had Not Been Declared Inoperable at Time of Removal & Not Reinstalled within 72 H Limit.Caused by Procedural Error.List of safety- Related Snubbers Required Operable Compiled (← links)
- 05000295/LER-1986-041, :on 861118,portable Particulate/Iodine Continuous Air Sampler Found Inoperable.Caused by Personnel Error.Sampler Relocated to Locked Caged Area in Turbine Bldg (← links)
- 05000295/LER-1986-033-01, :on 860910 & 11,pressurizer Steam Temp of More than 320 F Greater than Pressurizer Spray Temp Discovered. Caused by Inadequate Operating Procedure.Pressurizer Cooled. Procedures & Operator Training Changed (← links)
- 05000295/LER-1986-035-01, :on 860911,during Lowering of Level in Spent Resin Storage Tank,Minor Radioactive Release Into Control Room Occurred.Caused by Relief Damper Design & Installation Deficiencies.Dampers Blanked Off (← links)
- 05000295/LER-1986-034-01, :on 860906,reactor Containment Fan Coolers 1B & 1E Accidentally auto-started.Caused by Bumping Contact on Shutdown Timer During Live Troubleshooting.Electrical Maint & Technical Staff Cautioned (← links)
- 05000295/LER-1986-031-01, :on 860625,temporary Procedure Did Not Receive 14-day Onsite Review,Per Tech Specs.Caused by Loss of Procedure in Mail Due to Failure to State Route Change.Hand Delivery of Changes Required (← links)
- 05000295/LER-1986-032-01, :on 860905,while Performing Tech Spec Surveillance 15.6.35-1,several ESF Components Autostarted. Caused by Inadequate Procedure.All Equipment Will Be Identified Prior to Simulated Loss of Power (← links)
- 05000295/LER-1985-023, :on 850603,steam Generator Steam Flow Channel II Read High & Temporary Procedure Change Made to Troubleshoot Loop.Temporary Change Paperwork Misplaced. Caused by Inadequate Tracking sys.W/861209 (← links)
- 05000295/LER-1986-021-01, :on 860516,containment Sump Pump Autostarted Due to High Water Level.Caused by Leaking Loop B Pressurizer Spray Valve.Valve Packing Replaced (← links)
- 05000295/LER-1987-012-05, :on 870515,discovered Logic Surveillance High Steam Flow Safety Injection Block Permissive Not Done. Caused by Faulty Test Procedure Requiring Closure of MSIV & Subsequent Unit Trip.New Procedure Developed (← links)
- 05000295/LER-1987-010-06, :on 870504,discovered That No Filters Saved from Two Gas Decay Tank Releases in Violation of Tech Spec 4.12.Caused by Inadequate Communication Between Chemistry Supervisors & Technicians.Procedures Changed (← links)
- 05000295/LER-1986-030-01, :on 860825,fire Barriers Found to Be Nonfunctional Due to Use of Nonfire Retardant Matl.Caused by Inadequate Design Review.Fire Watch Posted.Some Nonretardant Matl Removed & Remainder Encapsulated (← links)
- 05000295/LER-1986-029-01, :on 860821,disparity Between PORV Stroke Time & Test Criteria in Low Temp Overpressurization Protection Sys Found.Caused by Personnel Error & Lack of Tech Spec Requirement.Test Criteria Revised (← links)
- 05000295/LER-1986-040, :on 861022,during Insp of Environmentally Qualified Splice Installations,Three Improperly Terminated Instrument Leads Found in Environmentally Harsh Area.Caused by Unclear Drawings.Walkdown Planned (← links)
- 05000295/LER-1987-009-06, :on 870430,safety Injection Occurred Due to Steam Line Delta Pressure.Caused by Deenergization of MSIVs Due to Electrical Equipment Operator Misinterpreting Shift Engineer.Changes Made Re Communications (← links)
- 05000295/LER-1987-011-04, :on 870430,while in Process of Shutting Down, High Flux Reactor Trip Occurred from Source Range Channel 1N31.Caused by Noise on Extension Source Range Signal Cable. Cable Repositioned (← links)
- 05000295/LER-1986-039-01, :on 861016,attendant Unable to Determine If Prefilter Inlet Damper PT-19 Was Open.Caused by Internal Access Door Open Due to Door Gasket Falling Off.Access Door Closed & Door Gasket Replaced (← links)
- 05000295/LER-1986-044-01, :on 850422,inadvertent ESF Actuation Occurred Resulting from Switching Instrument Bus 112 from Regulated to Unregulated Power Supply.Caused by Procedures Not Addressing Listed Info.Procedures Revised (← links)
- 05000295/LER-1986-027-01, :on 860708,two Open Holes Found in Svc Water Pump Room in Crib House During Insp of Fire Protection Penetration Seals.Caused by Inadvertent Omission During Periodic Surveillance.Holes Repaired (← links)
- 05000295/LER-1997-021-02, :on 970919,nuclear Instrumentation Sys Power Range Rate Trip Setpoint Was Left Greater than TS Limit. Cause Has Not Been Determined.Revised Unit 2 Related Procedures on 970814 (← links)
- 05000295/LER-1994-010-01, :on 940702,Unit 1 RT Occurred Due to Generator/ Bus Duct Fire.Caused by Inadequate Design.Developed Guidelines for Improved Installation W/Revised Design (← links)
- 05000295/LER-1997-019-02, :on 970819,discovered Failure to Test Safety Related Logic Circuits Required by Tss.Cause for Condition Has Not Been Determined.Procedures Will Be Revised (← links)
- 05000295/LER-1987-002-04, :on 870112,eddy Current Field Rept Revealed That Steam Generator 1D Classified as Category C-3 in Tech Spec Due to 38 Tubes Being Defective.Caused by Intergranular Attack & Antivibration Bar Wear.Tubes Sleeved (← links)
- 05000295/LER-1986-014-02, :on 860408,OB Auxiliary Bldg Supply Fan Outlet Damper Found Failed Open W/Fan Off.Caused by Turning Off 120-volt Ac Switch for Damper Control Loop.Notice Will Be Posted on Switches Requiring Closed Dampers (← links)
- 05000295/LER-1997-015-02, :on 970724,Unit 1 EDGs & Unit 2 RHR Sys Were Declared Inoperable & Inadvertent Esg Actuation Was Noted While Performing TS Related Surveillances.Cause Is Under Investigation.Restored ESF Equipment (← links)
- 05000295/LER-1986-011-01, :on 860228,diesel Generator O Failed to Start from Train B During Performance of Quarterly Test of ESF Safeguard Actuation.Caused by Faulty Emergency Starting Relay Sockets.Sockets Resoldered (← links)
- 05000295/LER-1987-001-04, :on 870112,explosive Gas Mixture Found in hold- Up Tank 1.Caused by Tank Isolation from Automatic Waste Gas Analyzer.Tank Purged & Returned to Svc.Procedures Will Be Revised Re Operation of hold-up Tank (← links)
- 05000295/LER-1986-044, :on 860227,discovered That Instrument Maint Procedure IMRS-16 Did Not Meet Calibr Methodology in Tech Specs.Procedure in Effect Since 1980.Caused by Personnel Error.Procedure Will Be Revised (← links)
- 05000295/LER-1987-008-05, :on 870401,pneumatic Bypass for 1B Diesel Generator Room Fan Damper Removed W/O Energizing Fan Breaker as Require to Maintain Damper Closed.Caused by Poor Communication.Personnel Counseled (← links)
- 05000295/LER-1986-040, :on 861022,during Insp of Environmentally Qualified Splice Installations,Three Instruments Found W/ Leads Landed on Terminal Blocks,Making Instruments Inoperable.Caused by Inadequate Info (← links)
- 05000295/LER-1986-026, :on 860519,during Mod Overview Insp,Raychem Heat Shrink Style Environmentally Qualified Splices Found Incorrectly Installed.Caused by Inadequate Instructions from Mfg.Training Initiated (← links)
- 05000295/LER-1987-004-03, ,on 870212,reactor Tripped When Instrument Power Fuses Removed W/Level Trip Switch in Normal Position. Caused by Personnel Failure to Verify Procedures & Miscommunication.Engineer Counseled (← links)
- 05000295/LER-1986-043-01, :on 861204,auto-start of Svc Water Pump 1B Occurred Due to Movement of Svc Water Pump Main Control Switch from pull-to-lock to After Trip Position.Caused by Mod Re Secondary Undervoltage Protection (← links)
- 05000295/LER-1988-013-06, :on 880713,reactor Trip Occurred on Steam Flow/ Feedwater Flow Mismatch W/Low Steam Generator Level.Caused by Square Root Extractor 1FM-530B Module Failure.Module Replaced (← links)
- 05000295/LER-1986-025, :on 860616,containment Spray Additive Tank Below Min Required Tech Spec Level.Caused by Inadequate Calibr Procedure.Calibr Procedure Revised & Tygon Tubing Attached (← links)
- 05000295/LER-1986-042, :on 861128,component Cooling Pump Oc Autostarted.Caused by Electrician Bumping Into Timer. Electrical Maint Will Improve Procedure E023-1 to List Proper Precautions & out-of-svc Requirements (← links)
- 05000295/LER-1988-014-05, :on 880707,incomplete Channel Calibr of PORVs Noted.Caused by Personnel Error.Pressurizer PORVs Tested & Tech Spec Surveillance Requirements Reviewed to Ensure Compliance (← links)
- 05000295/LER-1986-028-01, :on 860723,boron Injection Tank Recirculation Inadvertently Isolated.Caused by Cognitive Error by Licensed Operators.Valve Lineup Restored & Injection Tank Recirculation Reestablished (← links)
- 05000295/LER-1985-019, :on 850607,during Investigation of Noise Problem,Fuses Pulled & Replaced Causing Reactor Trip & Unexpected Closure of Msiv.Caused by Personnel Error. Summator 1PM505B Replaced (← links)
- 05000295/LER-1986-024, :on 860529,open Hole Discovered Penetrating Floor of Svc Water Pump Room Along West Wall Located in Crib House.Caused by Not Reclosing Penetration Originally Cut to Accommodate Cable Tray Riser (← links)
- 05000295/LER-1988-019-04, :on 881025,motor Driven Auxiliary Feedwater Pumps Inoperable During Blackout Event.Caused by anti-pump Design Deficiency.Mod Installed to Correct Design Deficiency for Auxiliary Feedwater & Svc Water Pumps.W/Undated Ltr (← links)
- 05000295/LER-1988-020-04, :on 881016,discovered Solenoid Operated Air Valve Continuously Venting,Caused by Piece of Foreign Matl Lodged in Valve.Valve Replaced & Surveillance 15.6.3 Being Rewritten.W/Undated Ltr (← links)
- 05000295/LER-1986-021-01, :on 860516,during Hot Shutdown,Excessive RCS Leakage Discovered.Caused by Blown Rupture Disk on Pressurizer Relief Tank.Leak Isolated.Rupture Disk Replaced (← links)
- 05000295/LER-1986-023-01, :on 860513,during Performance of Prestartup Functional Tests,High Flux Test Signal Caused Reactor Trip Breaker B to Trip Unexpectedly.Caused by Defective Relay. Relay Replaced & Tests Successfully Completed (← links)
- 05000295/LER-1986-019-01, :on 860514,QA Dept Discovered Rev 4 to Fuel Handling Instruction FHI-21,in Use Since 850314,not Reviewed by Technical Staff Supervisor.Procedure Reviewed & LER Circulated to personnel.W/860613 1tr (← links)
- 05000295/LER-1987-005-03, :on 870227,reactor Trip Signal on Steam Generator 1D lo-lo Level Generated.Caused by Inadvertent Opening of Loop D MSIV Bypass Valve in failed-closed Position.Valve Reclosed Manually (← links)
- 05000295/LER-1985-007-01, :on 850218,unmonitored Alternate Vent Path Created When Valve IFCV-RV85B Opened.Caused by Failure of current-to-pneumatic Pressure Converter.Procedures Now Require Valve Position Check Before Venting (← links)
- 05000295/LER-1986-015-01, :on 860415,four Bolt Holes W/O Fire Stop Matl Filling Found in Rod Control Room Wall.Caused by Failure to Follow Procedures & Failure to Notify Fire Station Mgt.Holes Filled.Periodic Surveillance Now Required (← links)
- 05000295/LER-1985-036-04, :on 851005,w/purge in Progress,Chart Recorder for Miscellaneous Vent Stack Gas Radiation Monitor Deenergized.Caused by Personnel Error.Purge Terminated (← links)
- 05000295/LER-1978-087-01, /01T-0:on 780902:while Diesel Generator 1A Was Out of Svc for Testing,Diesel Generator 1B Failed to Start. Caused by Improper Stroking of Starting Air Distributor Drive Bushing Causing Shift in Starting Air Timing (← links)
- 05000295/LER-1978-088-03, /03L-0:on 780908,during Normal Operation,Channel IL-537 Read Higher than Other Two Level Channels on Loop D by Over 5%.Caused by Steam Leak on Root Valve on Ref Line of Xmtr (← links)
- 05000295/LER-1978-085-03, /03L-0:on 780827,discovered Missing Belt on Containment Area post-sampler Blower.New Belt Installed (← links)
- 05000295/LER-1978-089-01, /01T-0:on 780911,during Normal Operation,Svc Water Pump 1C Removed for Breaker Insp.Two Other Pumps Not Immediately Verified as Operable & Standby AC & DC Power Supplies Not Checked.Caused by Personnel Error (← links)
- 05000295/LER-1978-086-03, /03L-0 on 780830:containment Isolation Valves IFCV-WD17A,IFCV-PR20A & IFCV-PR24B Failed During Testing. Caused by Oil in Instrument Air Line (← links)
- 05000295/LER-1978-082-03, /03L-0:on 780802,during Normal Operation,Daily Surveillance for Radiation Monitor in Control Room Intake from Turbine Bldg Omitted.Monitor Operable Prior to & After Missed Surveillance (← links)
- 05000295/LER-1986-019, :on 860514,QA Dept Discovered That Fuel Handling Instruction FHI-21,Rev 4,not Reviewed by Technical Staff Supervisor.Caused by Personnel Error.Ler Will Be Distributed to Personnel Involved in Review (← links)
- 05000295/LER-1997-005-03, :on 970221,supplement to Unapproved Mode Change W/Ts Required Equipment Inoperable Were Noted.Caused by Inadequate Planning & Briefing.Both Units Have Been Placed in Cold Shutdown W/Rcs at Atmospheric Pressure (← links)
- 05000295/LER-1986-010-01, :on 860303,discovered That Aircraft Fire Outlet Damper on OAS Ventilation Fan for Crib House Svc Water Pump Area Removed for Maint.Temporary Fire Seal Installed.Job Sheets Added to Damper Work Requests (← links)
- 05000295/LER-1997-024-01, :on 971113,TS Surveillance for Pressurizer Pressure Instrument Channel Was Missed.Caused by Procedural Inadequacy of Pressurizer Pressure Functional Test.Revised Appropriate Procedures & Tested Pressurizer Pressure (← links)
- 05000295/LER-1986-013-01, :on 860324,lower Limit of Detection for Gross Beta/Gamma Analysis Sump Discharge Failed to Meet Tech Spec Requirements.Caused by Inadequate Procedures.Procedures Revised (← links)
- 05000295/LER-1997-023-02, :on 971107,discovered That Auxiliary Bldg Ventilation Does Not Conform to UFSAR Due to Analysis Deficiency.Implemented Mod to Assure All Required Ventilation Is Filtered Through Charcoal When Done Manually (← links)
- 05000295/LER-1986-007-04, :on 860307,while in Normal Operation at 99% Power,Containment Isolation EIIS Sys Bd Valve LAOV-IA01A Closed,Isolating Instrument Air EIIS Sys Ld to Containment. Caused by Misadjusted Relay (← links)
- 05000295/LER-1986-010-02, :on 860303,observed That Outlet Damper for OAS Ventilation Fan for Crib House Svc Water Pump Area Removed. Caused by Fan Maint.Temporary Fire Seal Installed Over Open Penetration for Duration of Maint on Fan (← links)
- 05000295/LER-1997-022-02, :on 971022,non-safety Heating Sys Affected CR Habitability.Cause Is Not Yet Determined.Sys Engineering Will Revise & Perform Technical Staff Surveillance 15.6.161 (← links)
- 05000295/LER-1996-007-01, Forwards LER 96-007-01 Which Is Being Submitted to Update Safety Analysis & CA Taken Re Event That Occurred at Zion Nuclear Power Station,Unit 1.Commitments Made within Ltr, Encl (← links)
- 05000295/LER-1986-009-04, :on 860303,vent Fan Outlet Damper for 1B Diesel Generator Room Failed to Close Upon Receiving Actuation Signal from Fire Detection Sys.Caused by Coupling Pin Failure.Coupling Pin Fixed (← links)
- 05000295/LER-1997-001-14, :on 970110,recirculation Sump Cover Plate Holes Were Not Installed at Original Construction.Caused by Construction Error.Holes Installed IAW Emergency Exempt Change Prepared Prior to Ramp Down (← links)
- 05000295/LER-1986-022-01, :on 860512,auto-start of Auxiliary Feedwater Pumps Occurred During Draining of Steam Generator During Water Chemistry Mods.Caused by Lack of Procedure for Draining.Procedures Revised (← links)
- 05000295/LER-1986-018-01, :on 860504,reactor Tripped Due to electro-hydraulic Control (EHC) Hydraulic Fluid Pressure Problems.Caused by Drift of Autostart Pressure to Backup EHC Pump.Pressure Switches Replaced & Recalibr (← links)
- 05000295/LER-1994-005-01, Forwards LER 94-005-01 Per 10CFR50.73(a)(2)(iv),which Requires 30 Day Written Rept When Any Event or Condition Resulted in Manual or Automatic Actuation of Any ESF, Including Rps.Commitments,Encl (← links)
- 05000295/LER-1997-026-02, :on 971209,Unit 1 1B DG & 1C Svc Water Pump Became Inoperable Due to Missed ESF Load Shed Verification Surveillance as Result of Scheduling Error.Caused by Improper Spec.Surveillance Testing (PT-431) Was Completed (← links)
- 05000295/LER-1986-017-01, :on 860424,discovered That Control Room make-up Ventilation Train HEPA Filters Not Leak Tested Immediately After Replacement.Caused by Inadequate Work Request.Filters Passed Leak Test on 860424 (← links)
- 05000295/LER-1986-008, :on 860221,negative Flux Rate Trip Discovered to Be Calibr to Nonconservative Value.Caused by Input Changes to Accident Analysis for Dropped Rods.Safety Analysis Procedures Reviewed (← links)
- 05000295/LER-1984-004-03, :on 840120,inadvertent Safety Injection Occurred During Repairs on Reactor in-core Detector Seal Leak.Caused by Operator Error.Operator Reprimanded & Reinstructed Re Operational Procedures (← links)
- 05000295/LER-1997-025-02, :on 971124,visual Insp of Reactor Cavity Area Was Not Performed Per Ts.Caused by Inadequate Review of TSS 15.6.21 Procedure Performed in 1991.Revised TSS 15.6.21 Procedure (← links)
- 05000295/LER-1997-021-01, Forwards LER 97-021-01,per 10CFR50.73(a)(2)(i)(B). Commitments Associated W/Correspondence,Encl (← links)
- 05000295/LER-1988-011-02, :on 880507,reactor Trip Occurred Due to lo-lo Level in Steam Generator 1B Due to Generator Excitation. Caused by Corrosion on Phase B in Primary Potential Transformer Resistors.Resistors Replaced (← links)
- 05000295/LER-1978-100-03, /03L-0 on 781018:Containment Air Particulate monitor,1RE0011 Blower Continually Tripped Due to Low Flow. Caused by Improper Valve Lineup of Monitor (← links)
- 05000295/LER-1978-100, Forwards LER 78-100/03L-0 (← links)
- 05000295/LER-1986-005-08, :on 860410,discovered That Outlet Dampers for Cribhouse Svc Water Area Ventilation Fans Obs & Ocs Failed Open & Inoperable.Caused by Fans Taken Out of Svc for Damper Repairs.Fans Placed Back in Svc (← links)
- 05000295/LER-1986-038-01, :on 861005,missed Surveillances of Technical Support Ctr Area Monitor RM-16 Occured.Caused by Personnel Oversight.Daily Channel & Monthly Source Checks Implemented (← links)
- 05000295/LER-1988-021-03, :on 881102,inadvertent Autostart of Outside Dosimeter Component Cooling Pump Occurred.Caused by Metal Filing Shorting Out.Metal Particle Removed from Timer Contact (← links)
- 05000295/LER-1985-021, :on 850603,momentary Loss of Power Due to Instrument Bus 112 Switching from Alternate to Normal Power Supply Opened Reactor Trip Breakers.Caused by Personnel Error.Warning Sign Placed by Transfer Switch (← links)
- 05000295/LER-1986-016-01, :on 860419,auxiliary Bldg Ventilation Standby Instrument Air Compressors Isolated.Cause Undetermined. Requirement for Shift Mgt Verification of Compressor Unisolation Steps in PT-210A Added (← links)
- 05000295/LER-1986-012-01, :on 860311,reactor Tripped from 100% Power. Caused by Open Reactor Trip Breaker During Performance of Test While Interlock Cell Switch Closed & Training Inadequate.Reactor Trip Breaker Removed (← links)
- 05000295/LER-1986-006-04, :on 860224,during Functional Test of Halon Fire Protection Sys,Fire Damper Between North & South Cable Penetration Vaults Inoperable Due to Obstruction by Cable. Caused by Personnel Error.Personnel Counseled (← links)
- 05000295/LER-1988-005-07, :on 880224,reactor Trip Occurred.Caused by Slow Response Time of Feed Regulating Valve 1C.Repairs to Feedwater Regulating Valve & Revs to Feedwater Pump Poppet Testing Procedures Underway.Blown Fuses Replaced (← links)
- 05000295/LER-1988-010-02, :on 880427,valves 1MOV-CS0006 & 1MOV-CS0010 Received Inadvertent Actuation Signal.Caused by Poor Procedure Format & Typo.Actuating Relays Reset & Valves Involved Closed (← links)
- 05000295/LER-1988-009-01, :on 880422,discovered That Logic Circuit Not Rigorously Tested Since Initial Preoperational Testing,Per Tech Specs.Caused by Failure to Add Relays to Calibr List When Relay Mod Complete.Logic Tested (← links)
- 05000295/LER-1988-018-03, :on 880823,Performance Test PT-10 Being Performed When Containment Spray 1C Diesel Driven Pump Failed to auto-start.Caused by Poor Contact Between Relay & Mounting Socket.Loose Relay Tightened (← links)
- 05000295/LER-1988-008-02, :on 880418,determined That Review of Certain Procedure Changes Not Properly Reviewed.Caused by Deficient Procedures.Administrative Procedure Revised (← links)
- 05000295/LER-1988-003, :on 880302,station Received Confirmation That Samples of Sr-89 Being Shipped to Offsite Lab for Isotopic Analysis Did Not Meet Lower Limit of Detection Required by Tech Spec.Caused by Delays in Shipment (← links)
- 05000295/LER-1985-037, :on 851012,high Alarm Received from Lake Discharge Tank Oa Radiation Monitor During Tank Ob Release Into Canal 2.Auto-closure of Valve to Secure Flow to Canal Failed.Alarm Caused by Failed Detector Tube (← links)
- 05000295/LER-1986-001-05, :on 860112,discovered That Violations of Tech Spec 3.7.2 Occurred When Cooling to Auxiliary Feedwater Pump 1B Isolated from 851221 to 860112.Caused by Personnel Error.Valve Opened.Procedure Revised (← links)
- 05000295/LER-1988-007-03, :on 880325 & 26 & 0401,hydraulic Steam Generator Snubbers Failed.Caused by Hydraulic Fuel Contamination Due to Inadequate Flushing.Snubber Overhaul Procedures Will Be Revised (← links)
- 05000295/LER-1988-017-02, :on 880723,reactor Trip Occurred When Power Increased to power-range Permissive P-10 Setpoint.Caused by Personnel Error & Procedural Deficiency.General Operating Procedure GOP 4 Will Be Changed to Add Step (← links)
- 05000295/LER-1988-006-03, :on 880325,svc Water Pump Flowrate Below Required Dilution Flow During Liquid Radwaste Release.Caused by Incorrect Assumption Re Actual Flow Output of Two Svc Water Pumps.Tech Spec Change to Be Implemented (← links)
- 05000295/LER-1988-015-05, :on 880715,Edison Sys Grid Voltage Experienced Degradation Due to Unusually High Load Demand.Caused by Sys Grid Voltage Degradation.Diesel Generator Secured & Bus 147 Restored (← links)
- 05000295/LER-1988-012-07, :on 880617,determined That as Found Valve Setpoints for All 20 Main Steam Safety Valves Failed Required 1% Setpoint Pressure Tolerance.Caused by Personnel Error.Personnel Training Conducted (← links)
- 05000295/LER-1997-022-01, Forwards LER 97-022-01,IAW 10CFR50.73(a)(2)(v).Commitments Made within Ltr,Encl (← links)
- 05000295/LER-1985-043-03, :on 851122,penetration Pressurization Air Compressor 1 Started Due to Low Supply Pressure from Instrument Air Sys.Caused by Instrument Drift of Oil Temp Trip Switch.Switch Recalibr (← links)
- 05000295/LER-1988-012-04, :on 880617,main Steam Safety Valves,When Tested W/Steam,Failed 1% Setpoint Pressure Tolerance as Required by Tech Specs Table 4.7-1.Caused by Setpoint Drifting or Testing Method Used.Safety Valves Overhauled (← links)
- 05000295/LER-1987-001-03, :on 870106,discovered Explosive Gas Mixture in Holdup Tank Due to Missed Tech Spec Surveillance.Caused by Inadequate Procedure Which Did Not Include Steps Necessary to Ensure Sampling.Procedure Revised (← links)
- 05000295/LER-1978-115-99, /99L-0 on 780314:subj Facil Did Not Possess Cert of Compliance for Packages for 12 Shipments of Radioactive matl.10CFR71.12 Had Been Misinterpreted to Apply to Hittman Nuclear Packages.Registered W/Nrc to Use Hittman Package (← links)
- 05000295/LER-1978-115, Forwards LER 78-115/99L-0 (← links)
- 05000295/LER-1978-120-03, /03L-0 on 781027:5 Snubbers Which Had Empty Reserviors Were Proven Inoperable When Bench Tested.Caused by Hydraulic Fluid Leakage.Leakeage Sources:Reservoir Seals, Leaking Body Joints & Adjustment Screw Thread Seals (← links)
- 05000295/LER-1978-109-03, /03L-0 on 781020:during Refueling Surveillance Noted That Steam Generator 1D Level Channel IL-538 Was 5% High,Exceeding 2% Loop Tolerance.Caused by Blocked Instru Line Leading to Transmitter.Line Subsequently Cleared (← links)
- 05000295/LER-1978-109, Forwards LER 78-109/03L-0 (← links)
- 05000295/LER-1978-120, Forwards LER 78-120/03L-0 (← links)
- 05000295/LER-1978-107-03, /03L-0 on 781020:during Refueling Surveillance, Noted That Steam Generator 1B Level Channel 1L-548 Had Drifted Above Tech Spec Accuracy Limit.Caused by Instru Drift of Transmitter Instru Subsequently Recalibr (← links)
- 05000295/LER-1978-107, Forwards LER 78-107/03L-0 (← links)
- 05000295/LER-1978-110-03, /03L-0 on 781021:surveillance Level Xmtrs 950,951 for Accumulator a & 956,957 for Accum B Were Found Out of Tolerance Low.Caused by Instru Drift (← links)
- 05000295/LER-1978-110, Forwards LER 78-110/03L-0 (← links)
- 05000295/LER-1978-106-03, /03L-0 on 781020:during Refueling Outage Surveillance,Noted That Feed Water Flow Xmtr 1LT-531 Had Shifted in Excess of Tech Spec Limits.Caused by Transmitter Drift.Xmtr Recalibr & Channel Returned to Normal (← links)
- 05000295/LER-1978-106, Forwards LER 78-106/03L-0 (← links)
- 05000295/LER-1978-096-03, /03L-0 on 780904:channel 1L-537 Higher than 2 Redundant Channels Due to Steam Leak on Root Valve (3/4, Manual,Globe)On Sensing Line Xmtr.Channel Failed Again on 780908.Root Valve Replaced (← links)
- 05000295/LER-1978-096, Forwards LER 78-096/03L-0 (← links)
- 05000295/LER-1978-102-03, /03L-0 on 781006:Westinghouse Reported 0.5% Error in Apdms Limit Calculations Due to Roundoff & Addl Apparent Error Totaled 1.5%,creating Potential for Exceeding Apdms Limits.Caused by X.Xxx Format of Apdms Calculations (← links)
- 05000295/LER-1978-102, Forwards LER 78-102/03L-0 (← links)
- 05000295/LER-1978-097-03, /03L-0 on 781004:Unit 1 Component Cooling Radiat Monitor Would Not Respond to Check Source.Caused by Water Damaged Detector in Detector Well & Defective Rate Board (← links)
- 05000295/LER-1978-097, Forwards LER 78-097/03L-0 (← links)
- 05000295/LER-1978-091-03, /03L-0 on 780914: Damper Switching Sequence from Normal to Accident Mode Caused Pressure Differential in 1B Rcfc.Pressure Differential Caused Accident Inlet Damper Blades to Flex & Bend.Switching Sequence to Be Changed (← links)
- 05000295/LER-1978-091, Forwards LER 78-091/03L-0 (← links)
- 05000295/LER-1978-094-03, /03L-0 on 780914:on a Phase a isolation,1FCV-PR24B & 1FCV-WD17A Failed to Close Placing Containment Isolation Sys in Degraded Mode.Caused by Asco 8320 Solenoid Valve Failing to Close Due to Oil in Instru Air (← links)
- 05000295/LER-1978-094, Forwards LER 78-094/03L-0 (← links)
- 05000295/LER-1978-092-03, /03L-0 on 780914:an Inadvertent SI Occurred When 1A Diesel Generator Was Started Due to Bent Plunger Spring Causing Failure of Engine Trip Lockout Solenoid Valve (Asco 8320).Valves Replaced & Springs Checked (← links)
- 05000295/LER-1978-092, Forwards LER 78-092/03L-0 (← links)
- 05000295/LER-1987-017-07, :on 871210,during Periodic Test PT-207 on Penetration Fire Barriers,Unacceptable Gap Discovered.Caused by Thermal Contraction of Wall Degrading Fire Retardant Matl in Gap.Fire Watch Set Up Until Barrier Fixed (← links)
- 05000295/LER-1978-095-99, /99X-0 on 780914:shortly After Reactor Trip an Inadvertent Safety Injection Occurred from a False Delta P Steam Pressure Signal,Generated from Shock of Feedwater Hammer.No Damage Resulted from Safety Injection (← links)
- 05000295/LER-1978-095, Forwards LER 78-095/99x-0 (← links)
- 05000295/LER-1978-122-03, /03L-0 on 781107:fuel Bldg Area Radiat Monitor ORE0005 Alarmed High Due to Erroneous Readings in Control Room & Local Readouts.Caused by Failed Gm Tube;Detector Replaced (← links)
- 05000295/LER-1978-122, Forwards LER 78-122/03L-0 (← links)
- 05000295/LER-1978-129-03, /03L-0 on 781206:Unit 1 Purge Exhaust Rad Monitor Was Incorrectly Valved.Identification of Personnel & Cause 1RTPR09 of Event Could Not Be Determined.Control Room Is Being Investigated (← links)
- 05000295/LER-1978-129, Forwards LER 78-129/03L-0 (← links)
- 05000295/LER-1978-121-03, /03L-0 on 781101:MSIV 1D from Train a Did Not Close When Signal Was Removed,Caused by Relay Plunger Sticking (← links)
- 05000295/LER-1978-121, Forwards LER 78-121/03L-0 (← links)
- 05000295/LER-1978-078-01, /01L-0:on 780818:possible Use of Atypical Weld Metal Discovered in Loop 4 of Reactor Pressure Vessel. Interim Heatup & Cooldown Curves Calculated & Used to Provide Adequate Conservatisms Until Issue Resolved (← links)
- 05000295/LER-1978-084-03, /03L-0:on 780822,transmitter 1FT-446 Failed at 103%.Caused by Failure of Oscillator in Fisher-Porter Model 10B2496 Transmitter (← links)
- 05000295/LER-1986-003-04, :on 860214,block Valve 1MOV-RC800A Not Stroked Quarterly Since June 1985.Caused by Error in Tech Specs & Inservice Insp Testing Valve Program.Program Being Upgraded (← links)
- 05000295/LER-1997-011-02, :on 970423,declared Main Steam Line Pressure Transmitters Inoperable.Caused by Calculation Error.Will Revise Instrument Loop Insulation Resistance Calculation & Replace Pressure Transmitters (← links)
- 05000295/LER-1997-012-02, :on 970423,determined That Test Criteria for H Recombiner Was Inappropriate.Caused by Low Std for for Documentation of Changes to Vendor Recommendations. Will Review Results of 1995 TS Compliance Self Assessment (← links)
- 05000295/LER-1997-009-01, :on 970114,1FCV-CS0002 Was Inoperable Between 970115 & 0208.Caused by Failure to Verify That Acceptance Criteria for Return to Service Was Met.Disciplined Unit Supervisor & Will Cover Event in Licensed Operator Training (← links)
- 05000295/LER-1986-008-01, :on 860221,negative Flux Rate Trip Discovered Calibr to Nonconservative Value.Caused by Discrepant Westinghouse Owners Group Procedure Restrictions.Tech Spec Approved by NRC (← links)
- 05000295/LER-1986-002-08, :on 860218,fire Pump Out of Svc for More than 7 Days.Caused by Performance of Routine Maint Repairs. Redundancy Provided Via Svc Water Booster pumps.Motor-driven Fire Pump Tested Once Per Wk (← links)
- 05000295/LER-1997-013-02, :on 970412,VT-3 Insp Requirements of Relief Request CR-13 for Reactor Head Bolting Were Not Performed. Caused by Failure to Revise ISI Database After SER Received from Nrc.Procedure Revised (← links)
- 05000295/LER-1997-014-02, :on 970502,TS Surveillances on Radiation Monitors Were Missed Because Technical Interpretation That Kept 1(2)RT-PR15 Operable Was Inoperable.Revised Station Procedures (← links)
- 05000295/LER-1985-040-04, :on 851219,penetration Pressurization Air Compressors Auto Started.Caused by Low Supply Pressure from Instrument Air Sys Due to Air Dryer Malfunction.Consequences of Loss of Pressure Stressed to Personnel (← links)
- 05000295/LER-1985-037-04, :on 851012,during Release of Ob Lake Discharge Tank Into Discharge Canal 2,isolation Valve Failed to Close on High Radiation Alarm Resulting from Detector Tube Failure.Cause Undetermined (← links)
- 05000295/LER-1985-045-04, :on 851122,auto-start of Penetration Pressurization Air Compressors 0 & 1 Occurred Due to Low Supply Pressure from Instrument Air (IA) Sys.Caused by IA Compressor 2A Trip (← links)
- 05000295/LER-1985-032, :on 850909,six Containment Isolation Phase a Valves Stroked Closed During Periodic Test PT-10, Safeguards Actuation Unit 1. Caused by Personnel Error. Test Operators Cautioned (← links)
- 05000295/LER-1985-035-04, :on 840513,caustic Contaminant Accidently Entered Radwaste Sys Releasing Radioactive Contaminant in Liquid Waste.Caused by Maint Personnel Performing Environ Insp on Sys Valves.Waste Processed (← links)
- 05000295/LER-1985-042, :on 851115,penetration Pressurization Air Compressors 0 & 1 Auto Started Due to Low Supply Pressure from Instrument Air Sys.Caused by Worn Oil Pump Seals.Air Compressor Oil Pump Overhauled (← links)
- 05000295/LER-1997-010-01, :on 970404,radiation Area Surveys Were Missed. Caused by Inadequate TS Review.Nso,Unit Supervisor & Shift Engineer,Counseled (← links)
- 05000295/LER-1985-038, :on 851015,discovered That Portion of Component Cooling ASME Class III Piping Not Tested by 10-yr Inservice Insp Hydrostatic Tests.Caused by Personnel Error.Personnel Counseled (← links)
- 05000295/LER-1997-007-02, :on 970311,operator Opened Local Sys Auxiliary Transformer Panel.Cause of Sys Auxiliary Transformer Trip Could Not Be Conclusively Determined.Unit 2 Sys Auxiliary Transformer Tested for Damage (← links)
- 05000295/LER-1997-004-04, :on 970221,identified Failure to Start Pump in Required Time & Led to Declaring 1C Containment Spray Inoperable.Caused by Clogged Fuel Filter & Defective components.1C Containment Spray Pump Fuel Drained & Flushed (← links)
- 05000295/LER-1985-047-03, :on 851208,during Startup from Outage for Turbine Repairs,Reactor Power Changed by Greater than 15% in 1 H.Caused by Misunderstanding Between Radiation Protection & Operating Personnel.No Procedure Revs Made (← links)
- 05000295/LER-1985-041-03, :on 851022, 1 H Outside Delta I Band in Last 24 H Annunciators Found Inoperable.Caused by Error in Computer Program.Error Corrected & Program Tested. Administrative Procedure Implemented (← links)
- 05000295/LER-1985-044-03, :on 851206,inadvertent Steam Flow/Feedwater Flow Mismatch W/Low Steam Generator Level Reactor Trip Occurred.Caused by Steam Flow Transmitter 1FT-512 Drifting Out of Tolerance.Transmitter Replaced (← links)
- 05000295/LER-1985-046-03, :on 851206,both Source Range Channels Failed Following Reactor Trip.Caused by Faulty Preamplifier & Bad Detector Tube.Preamplifiers & Detector Well Connectors Replaced (← links)
- 05000295/LER-1985-039-03, :on 851015,low Svc Water Header Pressure Caused Auto Start of Svc Water Pump Ib.Caused by Procedural Deficiency in Periodic Test PT-9.Cautionary Note Added to PT-9 (← links)
- 05000295/LER-1985-038-04, :on 851015,discovered That Portion of Component Cooling ASME Class III Piping Not Tested by 10-yr Hydrostatic Test.Caused by Personnel Error.Review of Test Packages & Piping Diagrams Performed (← links)
- 05000295/LER-1985-031-04, :on 850814,penetration Pressurization Low Pressure Alarm Received & Zone 4 Pressure Observed Below Required 47 Psig.Caused by Leaking Weld Channels & Relief Valve.Channels Isolated & Valve Repaired (← links)
- 05000295/LER-1996-026, :on 961107,identified Fuel Handling Bldg Ventilation Does Not Conform to UFSAR & TSs Due to Design Deficiency.Controls Revised to Ensure Pipe Tunnel Exhaust Passes Through Charcoal Filters (← links)
- 05000295/LER-1996-025, :on 961106,identified That Refueling Mode Operating Procedure Violated Tech Spec.Caused by Management Deficiency.Removed Deficient Procedures from Use & Created Procedure to Control Associated Evolution (← links)
- 05000295/LER-1985-019-01, :on 850607,reactor Tripped & MSIVs Closed.Trip Caused by Removal of Source Range Fuses During Troubleshooting & Closure Caused by Failure of Summator. Module Replaced (← links)
- 05000295/LER-1985-030-04, :on 850802,all Three Penetration Pressurization Air Compressors Auto Started Due to Low Supply Pressure from Instrument Air Sys.Caused by Spurious High Vibration Trip of 2A Instrument Air Compressor (← links)
- 05000295/LER-1985-029-03, :on 850808,during Aircraft Fire Detection Sys Test (PT-210),diesel Generator 1A & 1B Room Ventilation Fan Outlet Butterfly Dampers Failed to Close at Proper Time. Caused by Stuck Pilot Valves.Valves Replaced (← links)
- 05000295/LER-1985-028-04, :on 850806,failure to Periodically Test Svc Bus Undervoltage Start of Steam Driven Auxiliary Feedwater Pump Discovered.Test Procedure PT-5C Written & Performed to Test Automatic Pump Start (← links)
- 05000295/LER-1997-003, :on 970117,determined That EDG Tests Completed in Previous Refueling Outages Failed to Meet TS Requirement. Caused by Programmatic Deficiencies.Corrected Deficient Procedures & Completed Tests on Operating Unit (← links)
- 05000295/LER-1997-002-01, :on 970117,containment Isolation Valves Were Not Tested Prior to Leaving Cold Shutdown.Caused by Mgt Deficiencies in TS Implementation Process.Containment Isolation Valves Will Be Verified Tested Prior to Mode 4 (← links)
- 05000295/LER-1985-016-05, :on 850731,operator Accidentally Tripped Over & Broke Off Control Air Line to Fire Protection Containment Isolation Valve 1FCV-FP08.Broken Air Line Repaired & Valve Returned to Position (← links)
- 05000295/LER-1985-027-04, :on 850726,Procedure CRN-85-357 Re Backfill Feedwater Instrument Sensing Lines Incorrectly Approved. Caused by Employee Error.Procedure Subsequently Approved W/Proper Signatures (← links)
- 05000295/LER-1997-001-03, :on 970110,recirculation Sump Covers Were Not Installed at Original Construction.Cause Is Unknown & Impact on Plant Operation Is Unknown.Sump Cover Was Removed,Holes Were Drilled & Cover Replaced Prior to Expiration of LCO (← links)
- 05000295/LER-1985-026-04, :on 850710,10 Valves W/O Penetration Pressurization Supply Not Tested During Cold Shutdown.Caused by Inadequate Procedural Review of Mod M22-1-81-19.Change to Tech Spec 15.6.10.e Submitted (← links)
- 05000295/LER-1985-034-04, :on 850920,temporary Procedure Change Written for Hydrotest of Svc Water Piping to & from Containment Fan Coolers Not Reviewed Onsite within 14 Days of Initiation. Appropriate Signatures Obtained (← links)
- 05000295/LER-1985-033-04, :on 850913,manual Quadrant Power Tilt Ratio (QPTR) Calculations Not Performed W/Qptr Alarm Inoperable. Caused by Personnel Error.Channel Returned to Normal.Shift Meetings Held (← links)
- 05000295/LER-1985-032-04, :on 850909,while Performing Periodic Test PT-10, Safeguards Actuation Unit 1, Six Containment Isolation Phase a Valves Inadvertently Stroked Closed.Caused by Improper Test Component Reset (← links)
- 05000295/LER-1985-025-04, :on 850627,after Taking Unit off-line for Repairs to Feedwater Regulating Valve,Control Rod Failure Received.Operator Manually Tripped Reactor.Caused by Phase Error in Group B.Alarm Reset (← links)
- 05000295/LER-1985-024-04, :on 850629,level in Steam Generator D Reached 25% Giving Automatic Reactor Trip in Anticipation of Loss of Heat Sink.Caused by Operator Error,Aggravated by Equipment Failure.Individual Counseled (← links)
- 05000295/LER-1985-022-04, :on 850611,refueling Water Storage Tank Isolation to Safety Injection Pump Failed to Close During Testing.Caused by Single Phase Surge Due to Pinched Leads in Valve Operator Motor Compartment (← links)
- 05000295/LER-1982-024, :on 820730,safety Injection Accumulator Tanks 1B & 1D Transmitters Found Exceeding + or - 4.5% Allowable Tolerance.Caused by Transmitter Drift Due to Hysteresis During Pressurization.Transmitters Recalibr (← links)
- 05000295/LER-1985-028, :on 850806,during Review of Tech Spec Surveillance Requirements,Discovered That Svc Bus Undervoltage Start of Steam Driven Auxiliary Feedwater Pump Not Periodically Tested (← links)
- 05000295/LER-1996-011-01, :on 960327,missed Inservice Testing Requirements for 1AOV-BD0008 & 1A0V-S18870A Resulting from Deficient Procedure.Procedures Revised to Address post-maint Testing (← links)
- 05000295/LER-1996-022, :on 960825,single Failure of Blackout Detection Control Circuit Prevented Automatic Sequencing of Safe Shutdown Loads.Caused by Original Design.Modification Has Been Completed (← links)
- 05000295/LER-1996-023, :on 960826,PORV Block Valve Failure Occurred Resulting in Shutdown.Caused by Personnel error.1MOV-RC8000B Valve Actuator Replaced & Successfully Tested (← links)
- 05000295/LER-1985-019-04, :on 850607,reactor Trip Resulted in High Steam Flow Safeguards Actuation,Closing All Msivs.Caused by Failure of Summator,Which Spiked Low.Module Replaced (← links)
- 05000295/LER-1985-021-04, :on 850603,when Instrument Bus Switched from Alternate to Normal Power,Momentary Power Loss Caused Reactor Trip.Caused by Switching Procedure Not Being Referenced.Warning Sign Placed at Switch (← links)
- 05000295/LER-1985-014-05, :on 850208,offgas Air Ejector Noble Gas Radiation Monitor Discovered Failed Low.Caused by Faulty Transistor in Test/Calibr Printed Circuit Board & Defective Rate Board.Boards Replaced (← links)
- 05000295/LER-1985-023-04, :on 850617,14-day Review Requirement Exceeded by 1 Wk for Change to Surveillance Procedure IMWR-523 Re Loop F-523 Steam Generator Loop C Steam Flow Channel.Caused by Inadequate Review Procedures (← links)
- 05000295/LER-1985-004, :on 850124,during Sump Valve Stroke Test PT-2B, Valves 1MOV-SI8812 a & B Failed to Reopen After Being Stroked Closed.Caused by Too Short Bypass Circuit Time.Time Reset & Tested (← links)
- 05000295/LER-1993-002-01, :on 931114,discovered That Various Readings for SG & Pressurizer Pressure Channel Checks Not Completed on Previous Day.Caused by Personnel Error.Rounds Completed on 930114 (← links)
- 05000295/LER-1989-008-02, :on 890609,discovered Possibility That Svc Water Sys May Not Supply Both Room Coolers W/Current Piping Configuration & cross-tie Valves in Closed Position.Caused by Design Deficiency.Valves Opened (← links)
- 05000295/LER-1985-015-04, :on 850417,excess Letdown HX Relief Valve Lifted & Remained Open.Caused by Mispositioned Nozzle Rings. Valve Reset (← links)
- 05000295/LER-1993-001-01, :on 930104,high Vibration Readings Resulted in Centrifugal Charging Pump 1A & SI Injection Pump 1B Being Declared Inoperable.Caused by Component failure.Form-fitted Magnet Will Be Used on Pump Gear Boxed (← links)
- 05000295/LER-1992-021-04, :on 921030,during Testing Nso Released Pushbottons 1,2,3 & 4 But Failed to Return Them to Normal Position.Caused by Personnel Error.Procedures Will Be Revised to Comply W/Writers Guide (← links)
- 05000295/LER-1991-014-01, :on 910731,missed TS Action Statement on TSC Spring Radiation Monitor ORIA-PR30,due to Personnel Error. Technician Involved Counseled & Training Given to Personnel on New TSC Spring (← links)
- 05000295/LER-1992-024-05, :on 921230 & 31, RHR Pump 1B Unexpectedly Started.Caused by Improper Setup & Adjustment of Sequence Timers During Installation & Manipulation of Timer Contacts. Test Revised.Possibly Reportable Per Part 21 (← links)
- 05000295/LER-1984-040-03, :on 850523,discovered That 840802 Initial Quarterly Channel Functional Test of Containment Sping Radiation Monitor 1RIA-PR40 Not Performed.Caused by Miscommunication Re Scope of Commitment (← links)
- 05000295/LER-1989-025-01, :on 891218,auxilary Feedwater Discharge Monitor Operated Valve Failed Due to Inadequate Design.Original Design Reviewed & Revised by Onsite Engineering (← links)
- 05000295/LER-1985-013, :on 850402,reactor Cavity Inadvertently Diluted During ECCS Full Flow Test.Caused by Failure to Fully Close Two Primary Water Sys Valves After Hydro Performed on Vol Control Sys Suction Line (← links)
- 05000295/LER-1985-012, :on 850329,during QA Audit Exit,Fire Hose Hydrostatic Pressure Tests Performed Improperly.Caused by Procedural Error.Procedure PT-203 Revised & Retesting of All Fire Hoses in Progress (← links)
- 05000295/LER-1992-023-04, :on 921214 & 15,operator Discovered That Defeat Switches Were Not Returned to Normal.Caused by Mgt Deficiency.Returning Switches Reviewed & Procedure Revised (← links)
- 05000295/LER-1985-018-04, :on 850516,during Type C Leak Testing of Containment Isolation Valves,Two Valves Found W/Excessive Leakage.Cause Not Stated.Valves Repaired & Retested (← links)
- 05000295/LER-1985-017-04, :on 850514,during Insp of safety-related Snubbers,Two of Eight Pulled Due to Low Fuel Levels & Declared Inoperable.Caused by Poor Seal Conditions Allowing Leakage of Hydraulic Fluid (← links)
- 05000295/LER-1983-031-03, /03L-0:on 830819,while Reviewing MSIV Schematic Drawings,Continuity of Keane Solenoid Valve Coil & Hfa Operate Relay Coil Could Not Be Verified Using Existing Test Procedure.Procedure Change Initiated (← links)
- 05000295/LER-1992-009-01, :on 920522, as Found Requirements for ILRT Not Met Due to Component failure.Rubber-like Substance Removed from Valve Seat Area & Penetration Inspected & Retested Successfully (← links)
- 05000295/LER-1992-022-02, :on 921204,multiple Svc Water Leaks Developed in Pressurizer Penetration.On 921207,air Compressor Aftercooler Drain Valve Found Throttled Open Two Turns.Cause Not Determined.Cr Drawings Enhanced (← links)
- 05000295/LER-1991-007-01, :on 910507,control Room HVAC Envelope Unfiltered Inleakage Found to Be Higher than Value Assumed in Docketed Analysis.Caused by Incorrect Assumed Values in Habitility Analysis.Inleakage Areas Repaired (← links)
- 05000295/LER-1990-011, :on 900410,uncontrolled Reactor Head Vent Release Occurred.Stricter Procedural Controls Imposed (← links)
- 05000295/LER-1990-022-01, :on 900915,reactor Trip Breaker Max Outage Time Exceeded Tech Spec (← links)
- 05000295/LER-1982-023-03, /03L-0:on 820713,during Normal Operation,Conponent Cooling Supply Valve to Pump Oil Cooler & Seal Plate Isolated.Cause Unknown.Component Cooling Alignment Procedure Changed to Require Complete Lineup Check (← links)
- 05000295/LER-1982-022-03, /03L-0:on 820709,low Pressure & High Flow Alarms Received on Zone 1 of Penetration Pressure Sys,Due to Leak in Rupture Disc on Zone 1.Caused of Failure Unknown.Rupture Disc Replaced (← links)
- 05000295/LER-1990-019, :on 900826,discovered That Quarterly Tech Spec Surveillance on Pressurizer Level Channel Not Performed. Caused by Programmatic Deficiency.Scheduling Program Changed & Mgt & Worker Awareness Heightened (← links)
- 05000295/LER-1990-018, :on 900824,vent Stack Sys Particulate Iodine Noble Gas Monitor 1RIA-PR49 Found in Flush Mode Rendering Monitor Inoperable.Caused by Personnel Error.Shifts Will Check to Ensure Proper Monitor Operation (← links)
- 05000295/LER-1990-017-01, :on 900813,turbine Bearing Lift Oil Pumps Tripped.Caused by Personnel Error.Event Tailgated W/All Operations & Maint Personnel,W/Emphasis on Importance of Employing Self Check Process (← links)
- 05000295/LER-1990-016-01, :on 900727,OA Lake Discharge Tank Failed to Isolate on High Radiation Signal Resulting in Spurious Alarm.Cause of Valve Failing to Isolate Not Determined. Liquid Canister Cleaned & Valve Inspected (← links)
- 05000295/LER-1990-015, :on 900726,incorrect Containment Flood Level Specified in Updated Fsar.Caused by Closure of Incore Shaft Area from Rest of Containment & Inconsistencies in Eop. Terminal Blocks Replaced W/Submerging Splices (← links)
- 05000295/LER-1993-008-05, :on 930823,residual Heat Removal Sys Taken Out of Svc for Control Ctr Breaker Insp.Work Mistakenly Logged Completed Though Sys Still Out of Svc.Caused by Mgt Deficiency.Periodic Test (PT-14) Changed (← links)
- 05000295/LER-1993-010-05, :on 931110,RHR Pump 1A Autostarted While Technical Staff Surveillance 15.6.148 Being Performed.Cause of Event Unknown But Investigation Still Ongoing.Work Request to Inspect SI Timer Written (← links)
- 05000295/LER-1993-009-05, :on 931018,determined 10CFR50.59 Safety Evaluation Performed on 920824 to Keep Auxiliary Bldg North Door Open During Continued Operation Not Transmitted for Offsite Review.Caused by Mgt Deficiency (← links)
- 05000295/LER-1990-021, :on 900922,gas Sample Not Analyzed Due to Personnel Error (← links)
- 05000295/LER-1990-015-01, :on 900726,identified High Flood Level Caused by Closed Off Incore Shaft Area.Replaced Terminal Blocks & Removed Sections of Leak Tight Enclosure Around Incore Shaft Area (← links)
- 05000295/LER-1992-019-01, :on 921008,autostart of ESF Components Occurred During Safeguards Testing.Caused by Procedural Deficiency. Incorrect Switches Replaced & Technical Staff Electrical Group Performed Visual Insp of Other Switches (← links)
- 05000295/LER-1990-014, :on 900628,determined N-2 Sys Inoperable W/Two Penetration Pressurization Compressors Out of Svc.Caused by Procedural Deficiency.Special Surveillance Checklist & Technical Staff Test Procedure Changed (← links)
- 05000295/LER-1982-021-03, /03L-0:on 820620,penetration Pressurization Sys Zone 2 Could Not Be Repressurized to Over 32 Psig.Caused by Sheared Internal Float on Zone in-line Flowmeter,Resulting in Float Falling & Restricting Makeup Flow (← links)
- 05000295/LER-1982-020-03, /03L-0:on 820510,during Refueling Outage,Fuel Bldg Area Radiation Monitor ORE-0005 Alarmed High.Caused by Failed Detector Tube.Tube Replaced & Monitor Calibr (← links)
- 05000295/LER-1982-018-03, /03L-0:on 820422,during Routine Calibr Surveillance,Radiation Monitor ORT-ARO8 for 592-ft Level of Auxiliary Bldg Found Lower than Tech Spec Limit.Cause Unknown.Procedures Being Revised (← links)
- 05000295/LER-1982-018, Forwards LER 82-018/03L-0 (← links)
- 05000295/LER-1982-019-03, /03L-0:on 820424,during Calibr Surveillance, Condenser Air Ejector Gas Monitor 1RE0015 Found to Be Reading Low in High Range of Monitor.Cause Unknown.Monitor Recalibr & Radiation Monitor Calibr Procedures Revised (← links)
- 05000295/LER-1982-019, Forwards LER 82-019/03L-0 (← links)
- 05000295/LER-1982-016-03, /03L-0:on 820405,during Refueling Calibr,Tavg Summator 1TM-412A Found Out of Tolerance.Caused by Insufficient Gain on Summator Hagan 111.Spare Summator Installed & Calibr.Channel Returned to Svc (← links)
- 05000295/LER-1982-016, Forwards LER 82-016/03L-0 (← links)
- 05000295/LER-1982-015-03, /03L-0:on 820331,containment Vent Isolation Valve 1AOV-RV0006 Failed to Fully Close Upon Receipt of High Radiation Signal.Caused by Loose Restraint Line.Restraint Line Secured & Valve Successfully Tested (← links)
- 05000295/LER-1982-015, Forwards LER 82-015/03L-0 (← links)
- 05000295/LER-1982-017-03, /03L-0:on 820405,loop 1A Reactor Coolant Cold Leg Temp Low Level Amplifier 1TM-411B Failed Low.Caused by Input Ground on Amplifier Hagan 118.Spare Low Level Amplifier Installed & Calibr & Channel Returned to Svc (← links)
- 05000295/LER-1982-017, Forwards LER 82-017/03L-0 (← links)
- 05000295/LER-1982-014-13, /13L-0:on 820325,during First Quarter 1982,shift Engineer Received 4.901 Rem Whole Body Dose Equivalent. Caused by Engineer Entering Unsurveyed Area of Reactor Cavity Incore Thimbles in Retracted Position (← links)
- 05000295/LER-1982-014, Forwards LER 82-014/13L-0 (← links)
- 05000295/LER-1982-012-03, /03L-0:on 820305,during Refueling calibr,1D Steam Generator Level Transmitter 1LT-538 Found Out of Tolerance High by Max of 2.8%.Caused by Zero Shift on Transmitter 1LT-538(F/P 13D 2495) (← links)
- 05000295/LER-1982-012, Forwards LER 82-012/03L-0 (← links)
- 05000295/LER-1982-013-03, /03L-0:on 820305,loop C & Loop D Reactor Coolant Flow Transmitters 1FT-426 & 1FT-434 Found out-of-tolerance During Refueling Calibr.Caused by Zero Shift.Both Transmitters Recalibr (← links)
- 05000295/LER-1982-013, Forwards LER 82-013/03L-0 (← links)
- 05000295/LER-1982-011-01, /01T-0:on 820317,RHR Suction Pressure Transmitter 1PT-403 Failed High & Suction Valve 1MOV-RH8702 Started to Close.Caused by Piece of Sheet Metal Accidentally Dropped on Inverter 111 Output Breaker.Breaker Reclosed (← links)
- 05000295/LER-1982-011, Forwards LER 82-011/01T-0 (← links)
- 05000295/LER-1993-007-04, :on 930707,reactor Tripped Due to Shorted Terminal on Loop Stop Isolation Valve Limit Switch.Shorted Lug on 1MOV-RC8001D Limit Switch Repaired & 1MOV-RC8002B Limit Switch Housing Dried Out (← links)
- 05000295/LER-1993-006-05, :on 930607,found Train B Emergency Makeup Air Treatment Sys Fan Local Disconnect Switch in Off Position Possibly Due to Switch Inadvertently Repositioned.Train a Emats Fan Turned on & Damper Position Verified (← links)
- 05000295/LER-1993-005-04, :on 930528,TS 3.14-1 Violation Occurred Due to Radiation Monitor Out of Svc W/O Ventilation Sys Being in Proper Position.Ventilation Sys Returned to Accident Position & Procedure Changed (← links)
- 05000295/LER-1992-008-02, :on 920508,discovered That 15 SW Butterfly Valves Did Not Meet Requirements of GL 89-10.Safety Analysis Completed & Five Listed Valves Torque Switch Settings Adjusted (← links)
- 05000295/LER-1992-008-01, Forwards Suppl LER 92-008-01 Re SW Butterfly Valves Not Meeting Design Basis Requirements,Per GL 89-10,updating Safety Analysis of Event & Corrective Actions Taken (← links)
- 05000295/LER-1993-003-03, :on 930121,informed of Potential Violation of Design Basis,W/Respect to Unconservative LTOP Setpoint. Caused by Design Deficiency.Setpoints Adjusted,Per Temporary Waiver of Compliance Granted on 930129 (← links)
- 05000295/LER-1990-013, :on 900612,discovered That Both Primary Water Makeup Isolation Valve & Emergency Makeup Isolation Valve to Isolation Valve Seal Water Tank Closed.Caused by Procedural Deficiency.Scope of Instruction SOI-7 Expanded (← links)
- 05000295/LER-1989-012-01, :on 890723,auxiliary Feedwater Pump Ba Declared Inoperable Due to Pump Failing Trip Test.Caused by Administrative Errors & Procedural Inadequacies.Proper Flows Established & Procedure PT-7 Revised (← links)
- 05000295/LER-1990-012-01, :on 900513,discovered That Continuous Sample of Particulate & Iodine Releases Not Taken Between 900508-13. Caused by Technicians Turning Off Continuous Air Sampler. Cage to House Sample Pump & Plug Assembled (← links)
- 05000295/LER-1990-010, :on 900423,radiation Monitor 1RIA-PR49 Taken Out for Svc for More than 30 Days to Repair Problem W/ Blower.Caused by Ineffective Tracking of Time Clocks & Work Load Due to Forced Outage.Tracking Improved (← links)
- 05000295/LER-1990-009, :on 900418-21,incorrect Samples of Vent Stack & Gas & Particulate Activity Taken When Radiation Monitor ORT-PR18 Out of Svc on 900418.Caused by Personnel Error. Stricter Mgt Controls Imposed Re Monitors (← links)
- 05000295/LER-1989-022-03, :on 891122,OBN Svc Water Area Vent Fan Aircraft Crash Damper Found Open W/Fan Off.Caused by Weakening of Solenoid Valve Coil,Allowing Plunger to Close.Solenoid Valve Replaced & Damper Closed (← links)
- 05000295/LER-1982-009-01, /01T-0:on 820308,during Refueling Outage,Five Defective Tubes in Steam Generator 1C Not Plugged.Caused by Inadequate Tube Marking Method Allowing Identification Templates to Be Misplaced.Procedures Revised (← links)
- 05000295/LER-1982-009, Forwards LER 82-009/01T-0 (← links)
- 05000295/LER-1982-010-03, /03L-0:on 820302,containment Purge Exhaust (CPE) Isolation Valve 1RV-0003 Failed to Fully Close on Receipt of Automatic Closing Signal Generated from de-energization of CPE Radiation Monitors.Caused by Tygon Tubing Being Stu (← links)
- 05000295/LER-1982-010, Forwards LER 82-010/03L-0 (← links)
- 05000295/LER-1982-007-03, /03L-0:on 820216 & 17,1D Steam Generator Pressure Channel 1P-535 Failed Sporadically While in Hot Shutdown. Cause Not Stated.Several Transmitter Components Replaced. Transmitters in Critical Applications to Be Evaluated (← links)
- 05000295/LER-1982-007, Forwards LER 82-007/03L-0 (← links)
- 05000295/LER-1982-008-03, /03L-0:on 820219,auxiliary Bldg 592-ft Monitor Found Reading Full Scale Low & Not Responding to External Radiation Source.Caused by Dirty Printed Circuit Board for Sensor Element.Board Cleaned (← links)
- 05000295/LER-1982-008, Forwards LER 82-008/03L-0 (← links)
- 05000295/LER-1982-006-03, /03L-0:on 820218,while Purging U-1,recorder for Stack Gas Monitor Ort Pr 18A Found Not Responding to Rad Monitor Readings.Caused by Inoperable Recorder.Recorder Repaired & Procedures Revised to Verify Operability (← links)
- 05000295/LER-1982-006, Forwards LER 82-006/03L-0 (← links)
- 05000295/LER-1982-005-01, /01T-0:on 820226,pieces of Nozzle Cover Hinges Found in 1B & 1D Steam Generator Primary Hot Legs Which Came from Cover Left in RCS During Spring 1981 Refueling Outage & Resulted in 4% Flow Reduction in Loop D,During 810413-0 (← links)
- 05000295/LER-1982-005, Forwards LER 82-005/01T-0.Detailed Analysis Encl (← links)
- 05000295/LER-1982-004-03, /03L-0:on 820203,during Visual Insp,Snubber BDRS-1761 on Steam Generator Blowdown Piping Found in Airbound Condition Which Substantiated Inoperability.Caused by Poor Seal Condition.Snubber Tested & Reinstalled (← links)
- 05000295/LER-1982-004, Forwards LER 82-004/03L-0 (← links)
- 05000295/LER-1982-003-03, /03L-0:on 820119,during Periodic Testing,Rhr Pump 1B Suction Valve 1MOV-8700B Failed to Open Electrically. Caused by Tripped Thermal Overloads on Valve Breaker.Valve Manually Opened.Overloads Reset (← links)
- 05000295/LER-1982-003, Forwards LER 82-003/03L-0 (← links)
- 05000295/LER-1982-002-99, /99X-0:on 820125,potential Problem Identified W/Horizontal Travelers,Size 3 Mfg by Corner & Lada Co. Travelers Could Become Deformed Under Certain Loading Conditions.Travelers Not Used at Facility (← links)
- 05000295/LER-1982-002, Forwards LER 82-002/99X-0 (← links)
- 05000295/LER-1982-001-03, /03L-0:on 820112,discharge Damper on Oc Fan Found Failed Open W/Fan Off,Leaving Aircraft Fire Protection Sys for Auxiliary Bldg Air Supply Intake Inoperable.Caused by Frozen Bore in Air Operated Relay Valve (← links)
- 05000295/LER-1982-001, Forwards LER 82-001/03L-0 (← links)
- 05000295/LER-1981-051-03, /03L-0:on 811215,battery 112 Was Not Given Equalizing Charge within Required Tech Spec Quarterly Interval.Caused by Unclear Battery Surveillance Procedure. Battery Given Equalizing Charge.Procedure Rewritten (← links)
- 05000295/LER-1981-051, Forwards LER 81-051/03L-0 (← links)
- 05000295/LER-1981-049-03, /03L-0:on 811128,power Range Channel N42 Indication Dropped from 100 to 0% Power.Caused by Defective High Voltage Power Supply (Power Designs Inc Component Nq 303).Power Supply Replaced (← links)
- 05000295/LER-1981-049, Forwards LER 81-049/03L-0 (← links)
- 05000295/LER-1981-050-01, /01T-0:on 811212,112 Battery & Battery Charger Taken Out of Svc for 6-h to Accomplish Fire Protection Cable Reroute Mod.Caused by Personnel Error.Personnel Reinstructed (← links)
- 05000295/LER-1981-050, Forwards LER 81-050/01T-0 (← links)
- 05000295/LER-1981-048-03, /03L-0:on 811111,containment Particulate & Gas Rad Monitors (1RE-0011 & 12) Failed Due to Tripped Blower. Caused by Mechanical Failure of Conde P/N 6SFCWSB Blower.New Blower Will Be Installed (← links)
- 05000295/LER-1981-048, Forwards LER 81-048/03L-0 (← links)
- 05000295/LER-1981-011-03, /03L-0:on 810317,pump for Turbine Bldg Air Sampler Found Off.Cause Unknown.Sample Filters Replaced & Pump Turned Back On.Addl Surveillance Being Instituted (← links)
- 05000295/LER-1981-011, Forwards LER 81-011/03L-0 (← links)
- 05000295/LER-1993-004-04, :on 930319,safeguards Actuation Stroke Timing on a Train Isolation Valves Opened Unexpectedly.Caused by Component Failure.Relay Insps & Repairs Will Be Performed.W/ (← links)
- 05000295/LER-1990-005, :on 900129 & 30,two Separate Lake Discharge Tank Released W/O Two Chemistry Personnel Independently Verifying Max Permissible Concentration Fraction.Caused by Procedural Deficiency.Release Form Modified (← links)
- 05000295/LER-1981-046-03, /03L-0:on 811023,U1 Offgas Particle & Gas Radiation Monitors Not Pulling Representative Sample & Release Path Not Being Continuously Monitored.Caused by Air in-leakage Due to Worn O-rings on Detector Housing Assembly (← links)
- 05000295/LER-1981-046, Forwards LER 81-046/03L-0 (← links)
- 05000295/LER-1981-045-01, /01T-0:on 811026,FSAR LOCA Analysis Assumed Time of 45-s for Containment Spray Flow Delivery to Containment, Less than Actual Time Required.Caused by FSAR Erroneous Assumption of Flow Start Time After Accident (← links)
- 05000295/LER-1981-045, Forwards LER 81-045/01T-0 (← links)
- 05000295/LER-1981-044-03, /03L-0:on 811006,instrument Failure Alarm on Failed Fuel Liquid Rad Monitor 1RT-PR27 Would Not Reset. Caused by Stuck Flow Switch Due to Boric Acid Buildup.Boric Acid Cleared & Mechanism Adjusted (← links)
- 05000295/LER-1981-044, Forwards LER 81-044/03L-0 (← links)
- 05000295/LER-1981-043-03, /03L-0:on 810909,operator Attempted to Close RCDT to Waste Gas Containment Isolation Valve 1DT-9160A & Valve Failed to Close.Caused by Asco Model LB83146 Solenoid Valve on Airline to Valve Operator Apparent Failure to Vent (← links)
- 05000295/LER-1981-043, Forwards LER 81-043/03L-0 (← links)
- 05000295/LER-1981-041-03, /03L-0:on 810905,while Performing Routine Heat Trace Surveillance,Discovered Heater Failure Alarm on Boric Acid Tank Line.Caused by Nicks to Heat Trace by Maint Removing Pipe Insulation.Circuit Repaired (← links)
- 05000295/LER-1981-041, Forwards LER 81-041/03L-0 (← links)
- 05000295/LER-1981-042-03, /03L-0:on 810908,during Normal Operation,Quarterly Surveillance on post-accident Sampling Sys Missed on Units 1 & 2.Caused by Radiation Protection Foreman Neglecting to Mark Scheduled Surveillance Date (← links)
- 05000295/LER-1981-042, Forwards LER 81-042/03L-0 (← links)
- 05000295/LER-1981-040-03, /03L-0:on 810830 & 0905,loop B Overtemp Delta T Indicator Found Reading Higher than Other Indicators.Caused by Deviation from Normal Gain Characteristics of Function Generator,Hagen Model 127-113.Generator Replaced (← links)
- 05000295/LER-1981-040, Forwards LER 81-040/03L-0 (← links)
- 05000295/LER-1981-039-01, /01T-0:on 810904,during QA Audit,No Calibr Data Found on File to Verify Calibr of Reactor Coolant Pump Trip Undervoltage & Underfrequency Relays.Caused by Lack of Procedures.Procedure Changed to Assure Calibr (← links)
- 05000295/LER-1981-039, Forwards LER 81-039/01T-0 (← links)
- 05000295/LER-1981-037-03, /03L-0:on 810817,during Normal Operation,Condenser Ejector Offgas Rod Monitor 1RE-0015 Alarmed High.Caused by Cap Fallen Off Detector Probe & Dirty Connections.Detector Replaced (← links)
- 05000295/LER-1981-037, Forwards LER 81-037/03L-0 (← links)
- 05000295/LER-1981-036-03, /03L-0:on 810106,during Surveillance Testing on Diesel 1A,abnormal Amount of Lube Oil Was Seen Leaking from Right Cylinder Head Cover 6.Caused by Broken Rocker Arm Due to Binding Between Arm & Rocker Stand.Diesel Repaired (← links)
- 05000295/LER-1981-036, Forwards LER 81-036/03L-0 (← links)
- 05000295/LER-1981-038-01, /01T-0:on 810817,containment Isolation Valve for Prompt Relief Trip Gas Space Sampling Failed to Close. Probably Caused by Incorrect Installation of Gas Analyzer Panel Due to Use of Uncontrolled Drawings (← links)
- 05000295/LER-1981-038, Forwards LER 81-038/01T-0 (← links)
- 05000295/LER-1981-030-03, /03L-0:on 810524,breaker Failed & Would Not Reclose After Circuit Supplying Diesel Generator Control Panel 1B Was Turned Off During Dc Ground Procedure on Dc Bus 112.Caused by Mechanical Breaker Failure (← links)
- 05000295/LER-1981-030, Forwards LER 81-030/03L-0 (← links)
- 05000295/LER-1994-005-03, :on 940403,subsequent Generator Trip & Reactor Trip Occurred.Caused by Fire Emanating from Main Generator Lead Box.Corrective Action:Replacing Unit 1 & 2,west Main Transformer,Inspecting & Repairing Generator (← links)
- 05000295/LER-1994-004-06, :on 930326,defeated Safeguards Actuation Signal Occurred Due to Lifted Leads on Two Motor Operated Valves. Caused by Personnel Error.Individuals Involved Counselled (← links)
- 05000295/LER-1994-003-07, :on 940323,discovered That Sensing Lines on All of Safety Related Pressure Transmitters Were Capped Off. Cause Was Management/Qa Deficiency.Corrective Action: Removing Pipe Caps & Labeling Units (← links)
- 05000295/LER-1991-001-08, :on 910129,TS Limiting Condition of Operation 3.0.3 Entered Due to Untested Containment Penetrations P-76 & P-80.Caused by Misinterpretation of Tss. Piping,Flanges & Relief Valves Visually Inspected (← links)
- 05000295/LER-1982-050-03, /03L-0:on 821224,overtemp delta-T Setpoint Loop 1B Indicator Observed Out of Tolerance High W/Respect to Three Redundant Loops.Caused by Drifting Function Generator 1NM-441B.Generator Recalibr (← links)
- 05000295/LER-1982-050, Forwards LER 82-050/03L-0 (← links)
- 05000295/LER-1982-040-99, QA Fire Pump Taken out-of-svc on 821018 Still Inoperable.Redundancy Provided Via Sys Water Booster Pumps,Diesel Driven Fire Pump & Svc Water Pumps.Diesel Driven Fire Pump Tested Once Per Wk (← links)
- 05000295/LER-1982-040, Forwards Updated LER 82-040/99X-1 (← links)
- 05000295/LER-1982-048-03, /03L-0:on 821213,blower Belt for Miscellaneous Vent Stack Monitor ORT-PR18 A&B Found Broken.Caused by Normal End of Life.Belt & Defective Relay in Instrument Fail Alarm Circuitry Replaced (← links)
- 05000295/LER-1982-048, Forwards LER 82-048/03L-0 (← links)
- 05000295/LER-1982-046-03, /03L-0:on 821203,while Disassembling Discharge Valve,Crosstie Valve Between Boric Acid Transfer Pumps 1A & 1B Found Leaking.Caused by Valve Normal End of Life.Repairs Completed & Pump 1A Returned to Svc (← links)
- 05000295/LER-1982-046, Forwards LER 82-046/03L-0 (← links)
- 05000295/LER-1982-047-03, /03L-0:on 821205,RCS Loop C Indication Changed Suddenly,Delta Temp Pegged Low & Temp Average Pegged High. Caused by RTD Mechanism Failure.Spare RTD Placed in Svc.Part Will Be Replaced During Shutdown (← links)
- 05000295/LER-1982-047, Forwards LER 82-047/03L-0 (← links)
- 05000295/LER-1982-031-03, /03L-0:on 820707,power Range Detectors Indicated Low by 46% of Span Nonconservatively,Changing Power Range High Flux Setpoints (25% & 109%).Caused by Miscalibr of Power Detectors.Detectors Readjusted (← links)
- 05000295/LER-1982-031, Forwards LER 82-031/03L-0 (← links)
- 05000295/LER-1994-014-03, :on 940907,determined That off-site Review of 10CFR50.59 Se,Approved on 940121 to Place CS Storage Tank OOS Not Performed.Caused by Mgt Deficiency.Se Transmitted to Corporate off-site Safety Review Group (← links)
- 05000295/LER-1991-006-03, :on 910423,blackout Signal Inadvertently Induced Due to Logic Sequence Error in Backfeed Procedure. Procedure Reviewed & Tested on Simulator to Verify Adequacy (← links)
- 05000295/LER-1991-005-04, :on 910421,instrument Inverter 111 Experienced Interruption in Output Power & Declared Inoperable.Caused by Unknown Factor.Extensive Troubleshooting & Testing Performed on Inverter 111 & Maint Performed (← links)
- 05000295/LER-1983-020-03, /03L-0:on 830713,unidentified RCS Leak Rate of Approx 1.6 Gpm Found.Caused by Packing Leakage of 0.8 Gpm of Two Boron Injection Tank Inlet Valves.Work Requests Issued & Leakage Reduced to Less than 1 Gpm (← links)
- 05000295/LER-1983-017-03, While at 78% Power & MSIV Partial Close Test (PT-3D) in Progress,High Steam Flow Safety Injection Occurred & MSIV 1D Found Open.Caused by MSIV Test Switch in Reset Position (← links)
- 05000295/LER-1983-004, Updated LER 83-004/99X-1,canceling Original Rept (← links)
- 05000295/LER-1990-007, :on 900227,no Sample Flow Obtained from Radiation Monitor.Caused by Sediment Accumulation in Monitor Which Plugged Sample Line.Compressed Air Used to Blow Sediment Accumulation Out of Sample Line (← links)
- 05000295/LER-1990-006, :on 900213,equipment Attendant Inadvertently Started Auxiliary Feedwater Pump 1B Instead of Auxiliary Feedwater Pump Lube Oil Pump.Protective Plastic Cover Added to Auxiliary Feedwater Pump Switch (← links)
- 05000295/LER-1990-004, :on 900127,unit Experienced Turbine Trip/ Feedwater Isolation Resulting from High Water Level.Caused by Personnel Error.Standing Order 90-04 Issued Requiring Operator Be Present at Panel (← links)
- 05000295/LER-1990-001-02, :on 900103,RCS Leak of Approx 20 Gpm Developed. on 900104,leak Source Determined to Be Packing Failure on RHR Pump RCS Suction Isolation Valve 1MOV-RH8702.Caused by Failure to Center Valve Stem.Valve Repacked (← links)
- 05000295/LER-1989-024-02, :on 891117,question Raised Re Operability of Aircraft Craft Crash Dampers in Closed Position.Caused by Reliance on Undocumented Belief.Inconsistency Between Tech Spec & FSAR Re Ventilation Will Be Resolved (← links)
- 05000295/LER-1981-031-03, /03X-1:on 810624,during Normal Operation,Fire Sump Radiation Monitor ORT-PR25 Spiked High for Several Minutes. Caused by Natural End of Life of Detector Tube.Tube Replaced (← links)
- 05000295/LER-1981-031, Forwards LER 81-031/03X-1 (← links)
- 05000295/LER-1981-035-03, /03L-0:on 810806,containment Gas & Particulate Radiation Monitor 1RE-0011 & 12 Failed.Caused by Monitor Blower Tripping Due to Mechanical Seizure.New Blower Installed & Monitor Reset (← links)
- 05000295/LER-1981-035, Forwards LER 81-035/03L-0 (← links)
- 05000295/LER-1981-034-03, /03L-0:on 810803,gas Decay Tank Cubicle Radiation Monitor ORT-PR02B Indicated High.Caused by Monitor Drifting Out of Calibr.Monitor Recalibr,Tested & Returned to Svc on 810817 (← links)
- 05000295/LER-1981-034, Forwards LER 81-034/03L-0 (← links)
- 05000295/LER-1981-033-03, /03L-0:on 810708,while Radiation Monitor 1RE0019 Was Inoperable,Manual Grab Sample Not Taken.Caused by Personnel Misunderstanding of Terms Out of Svc & Inoperative.Personnel Reinstructed (← links)
- 05000295/LER-1981-033, Forwards LER 81-033/03L-0 (← links)
- 05000295/LER-1981-029-99, /99X-0:on 810528,inverter 114 Failed,Yielding Safety Injection.Caused by Primary Winding of Master Sola Transformer Which Shorted to Ground,Tripping Inverter & Causing Slave Transformer to Burn Up (← links)
- 05000295/LER-1981-029, Forwards LER 81-029/99X-0 (← links)
- 05000295/LER-1981-032-03, /03L-0:on 810629,RCS Charging Pump 1A Balancing Drum Line Was Found Leaking from Circumferential Indication Upstream of Weld Connecting Line to Suction of Pump Casing. Caused by Vibration of Drum Piping.Piping Repaired (← links)
- 05000295/LER-1981-032, Forwards LER 81-032/03L-0 (← links)
- 05000295/LER-1981-004-03, Microswitch 2FIC-611A, Controlling Only Valve on RHR Recirculation Line B,Found to Be Defective.Caused by Faulty Procedure Used to Check Switch Calibr.Procedure Revised & Switches Tested (← links)
- 05000295/LER-1981-004, Forwards Updated LER 81-004/03X-1 (← links)
- 05000295/LER-1981-023-03, /03L-0:on 810422,discrepancies in PT-210 Were Not Reported.Fan Dampers Failed to Open on Fan Start,Fan Failed to Start & Relief Dampers Failed to Close on Fan Trip.Caused by Lack of Tech Spec Directions.Mods Under Investigat (← links)
- 05000295/LER-1981-023, Forwards LER 81-023/03L-0 (← links)
- 05000295/LER-1981-028-03, /03L-0:on 810615,during Normal Operation,Stack Gas Radiation Monitor ORE-0014 Began Spiking Erratically.Cause Unknown.Gm Tubes,Model 12NB3,replaced (← links)
- 05000295/LER-1981-028, Forwards LER 81-028/03L-0 (← links)
- 05000295/LER-1981-005-03, /03L-0:on 810204,shift Engineer Discovered That Two Hydrogen Recombiners Not Interchangeable as Implied in Fsar.Caused by 3-inch to 4-inch Reducer That Was Welded on Discharge Piping Making Recombiners Not Identical (← links)
- 05000295/LER-1981-005, Forwards LER 81-005/03L-0 (← links)
- 05000295/LER-1990-003, :on 900122,fire Door Between Turbine Bldg & Vestibule at South Control Room Entrance Found Open W/No Hourly Fire Watch Established.Caused by Door Being Jammed in Open Position.Door Stop to Be Installed (← links)
- 05000295/LER-1990-002-01, :on 900116,turbine Driven Auxiliary Feedwater Pump 1A Run Deadheaded,Damaging Pump.Caused by Mgt Error & Procedural Deficiency.Pump Disassembled & Impellar Replaced. Training Conducted (← links)
- 05000295/LER-1981-022-03, /03L-0:on 810528,instrument Inverter 114 Failed Concurrent W/Performance of Instrument Functionals,Resulting in Reactor Trip.Caused by Shorted Primary Windings of Master Sola Output Transformer.Unit Returned to Manufacturer (← links)
- 05000295/LER-1981-022, Forwards LER 81-022/03L-0 (← links)
- 05000295/LER-1981-026-03, /03L-0:on 810529,particulate & Iodine Filters Were Not Installed on Radiation Monitor ORT-RP12AB Before Returning to Svc.Caused by Technical Error.Filters Installed (← links)
- 05000295/LER-1981-026, Forwards LER 81-026/03L-0 (← links)
- 05000295/LER-1981-027-03, /03L-0:on 810529,particulate & Iodine Filters Were Not Installed on Radiation Monitor ORT-PR18AB Before Returning to Svc.Caused by Technician Error.Filters Installed (← links)
- 05000295/LER-1981-027, Forwards LER 81-027/03L-0 (← links)
- 05000295/LER-1981-025-03, /03L-0:on 810522,engineered Safety Feature Cubicle Ventilation Radiation Monitor ORT-PR12A&B Alarmed Indicating Failure.Cause Unknown.Monitor re-energized & Returned to Svc (← links)
- 05000295/LER-1981-025, Forwards LER 81-025/03L-0 (← links)
- 05000295/LER-1981-024-03, /03L-0:on 810522,control Room Intake to Turbine Bldg Air Radiation Monitor Indicated Failure.Cause Unknown. Monitor re-energized & Returned to Svc (← links)
- 05000295/LER-1981-024, Forwards LER 81-024/03L-0 (← links)
- 05000295/LER-1981-021-01, /01T-0:on 810527,heater Failure Alarm Discovered on Circuit 61008 During Penetrant Test.Caused by Chemelex Circuits Connected to Nelson Heat Trace Cable During Bit Changeout Due to Procedural Deficiency.Circuit Repaired (← links)
- 05000295/LER-1981-021, Forwards LER 81-021/01T-0 (← links)
- 05000295/LER-1981-003-03, /03L-0:on 810116,while in Hsd for Safe Shutdown & Engineered Safety Feature testing,1A Charging Pump Tripped But Would Not Restart.Caused by Dirty Mechanical Trip Linkage on Breaker.Breaker Replaced (← links)
- 05000295/LER-1981-003, Forwards LER 81-003/03L-0 (← links)
- 05000295/LER-1980-052-03, /03L-0:on 801120,Class I Pipe Tunnel Particulate & Iodine Radiation Monitor 1RT-PRO7A&B Failed & Could Not Be Reset.Caused by High Flow Through Magnahelic Due to Employee Error.Magnahelic Reset & Monitor Tested (← links)
- 05000295/LER-1980-052, Forwards LER 80-052/03L-0 (← links)
- 05000295/LER-1981-002-03, /03L-0:on 810115,during testing,1B MSIV Failed to Close.Caused by Failure of Two Dc Solenoid Valves to Actuate.Investigation Continuing (← links)
- 05000295/LER-1981-002, Forwards LER 81-002/03L-0 (← links)
- 05000295/LER-1981-016-03, /03L-0:on 810415,RHR Miniflow Control Valve Switch 1FIC-610A Would Not Trip During Hsd Surveillance,Resulting in Reduced RHR Flow.Caused by Micro Switch Out of Tolerance. Switch Recalibr.Replacement of Switches to Be Investi (← links)
- 05000295/LER-1981-016, Forwards LER 81-016/03L-0 (← links)
- 05000295/LER-1981-017-03, /03L-0:on 810417,heater Failure Alarm Annunciated on Circuit 61012 at OLP43 During Surveillance of Heat Trace Sys,Placing Boron Injection Tank in Degraded Mode.Caused by Circuit Breaker Failing to Remain in Closed Position (← links)
- 05000295/LER-1981-017, Forwards LER 81-017/03L-0 (← links)
- 05000295/LER-1981-012-03, /03L-0:on 810325,during Periodic testing,11 Inoperable Snubbers Were Found.Caused by Improper Lockup Settings &/Or Excessive Seal Bypass.Snubbers Were Overhauled,Tested & Reinstalled Operable (← links)
- 05000295/LER-1981-012, Forwards LER 81-012/03L-0 (← links)
- 05000295/LER-1981-009-03, /03L-0:on 810312,shift Surveillance of Fire Sump Radiation Monitor ORT-PR25 Overlooked.Caused by Personnel Error.Procedural Change to Be Made,Requiring Out of Svc Surveillance Verification at Beginning of Each Shift (← links)
- 05000295/LER-1981-009, Forwards LER 81-009/03L-0 (← links)
- 05000295/LER-1981-008-01, /01T-0:on 810325,during Leak Test,Borated Water Leakage Discovered from Test Holes on Bit Manway & Nozzles. Caused by Breaches in Type 304L Stainless Liner.Bit Replaced & Final Rept to Be Submitted (← links)
- 05000295/LER-1981-008, Forwards LER 81-008/01T-0 (← links)
- 05000295/LER-1981-006-03, /03L-0:on 810228,fire Sump Radiation Monitor ORT-PR25 High Alarmed.Caused by Break in Solder Joint in High Voltage Circuit of Monitor.Joint Repaired,Motor Functionally Tested & Returned to Svc (← links)
- 05000295/LER-1981-006, Forwards LER 81-006/03L-0 (← links)
- 05000295/LER-1981-001-03, /03L-0:on 810106,blower of Svc Bldg Radiation Monitor OPR036 Was Found Turned Off.Cause Unknown.Blower Turned on (← links)
- 05000295/LER-1981-001, Forwards LER 81-001/03L-0 (← links)
- 05000295/LER-1980-049-03, /03L-0:on 801029,component Cooling Liquid Monitor 1RE-017 Had No Response to Installed Check Sources.Caused by Bad Electrical Contacts Between Detector & Socket Assembly. Socket Replaced,Monitor Calibr & Tested (← links)
- 05000295/LER-1980-049, Forwards LER 80-049/03L-0 (← links)
- 05000295/LER-1989-025-03, :on 891218,auxiliary Feedwater motor-operated Valves Failed to Fully Close W/Pump 1B Running.Caused by Personnel Failure to Thoroughly Review Mod.Work Request Written for Maint Personnel to Investigate (← links)
- 05000295/LER-1989-026-02, :on 891214,security Officer Failed to Perform 2,400 Firewatch Surveillance on Svc Water Pump.Caused by Misunderstanding Between Offgoing & Oncoming Officers. Personnel Counseled & Action Taken (← links)
- 05000295/LER-1981-018-03, /03L-0:on 810423,during Surveillance on Heat Trace,Heater Failure on Circuit 51013 & OLP42 Discovered. Caused by Corrosion of Copper Nelson Sheathed Heat Trace. Faulty Section Replaced.Circuit Placed in Operating Mode (← links)
- 05000295/LER-1981-018, Forwards LER 81-018/03L-0 (← links)
- 05000295/LER-1981-019-03, /03L-0:on 810425,during PT-10,radiation Monitor ORTPR25 Failed to Recover Following de-energization of High Voltage Power Supply.Caused by Failed Resistor R218 & Transistors Q203 & Q204.Defective Components Replaced (← links)
- 05000295/LER-1981-019, Forwards LER 81-019/03L-0 (← links)
- 05000295/LER-1981-020-03, /03L-0:on 810424,during Normal Operation,Oa Boric Acid Tank Found to Be at 13.2% Concentration.Caused by Addition of High Concentration of Batched Boric Acid to Oa Boric Acid Tank.Concentration Reduced to within Spec (← links)
- 05000295/LER-1981-020, Forwards LER 81-020/03L-0 (← links)
- 05000295/LER-1979-097-03, /03L-0:on 790924,rod Urgent Alarm Received While Attempting to Move Shutdown Bank C.Caused by Failure of Pulser/Oscillator Card in Rod Control Logic Cabinet.New Card Obtained & Installed (← links)
- 05000295/LER-1979-097, Forwards LER 79-097/03L-0 (← links)
- 05000295/LER-1980-054-03, /03L-0:on 801215,RHR Miniflow Control Valve 1FIC-610A Switch Failed,Making RHR Pump Sys a Unable to Perform.Caused by Faulty Micro Switch.Switch Replaced & Recalibr (← links)
- 05000295/LER-1980-053-03, /03L-0:on 800825,component Cooling Liquid Rad Monitor 1RE 0017 Did Not Respond to Check Source & Indicator Was at Bottom of Scale.Caused by Drift in Monitor Plateau. Plateau Reset (← links)
- 05000295/LER-1980-053, Forwards LER 80-053/03L-0 (← links)
- 05000295/LER-1980-054, Forwards LER 80-054/03L-0 (← links)
- 05000295/LER-1979-096-03, /03L-0:on 791120,low-low Tave Comparator 1TC432GD Outputs Found Low,Exceeding Tech Specs Limit.Caused by Instrument Drift of Unknown Origin.Comparator Tested, Recalibr & Returned to Svc (← links)
- 05000295/LER-1979-096, Forwards LER 79-096/03L-0 (← links)
- 05000295/LER-1981-015-03, /03L-0:on 810412,radiation Monitor ORE-0005 High Alarmed.Caused by Setpoint Drift of High Voltage Power Supply Model PN1011.Monitor Recalibr.Power Supplies Adjusted & Will Be Replaced (← links)
- 05000295/LER-1981-015, Forwards LER 81-015/03L-0 (← links)
- 05000295/LER-1981-010-03, /03L-0:on 810318,fire Sump Radiation Monitor ORT-PR25 Spiked High.Caused by Intermittent Cold Solder Joint on Radiation Analyzer Readout Module.Module Replaced (← links)
- 05000295/LER-1981-010, Forwards LER 81-010/03L-0 (← links)
- 05000295/LER-1980-026-03, During Normal Operation, Pipe Tunnel Iodine Monitor 1RT-PR07B Failed Low.Caused by Natural End of Life of Photomultiplier Tube.Part Replaced. Monitor Functionally Tested & Returned to Svc (← links)
- 05000295/LER-1980-026, Forwards Updated LER 80-026/03X-1 (← links)
- 05000295/LER-1980-041-03, /03L-0:on 800829,during Normal Operation,Calibr of Rad Monitor 1RE-0015 Could Not Be Completed within 6-month Interval.Caused by Delay in Calibr Gas Delivery.Storeroom Low Limit Reviewed.Maint Was Reinstructed (← links)
- 05000295/LER-1980-041, Forwards LER 80-041/03L-0 (← links)
- 05000295/LER-1981-014-03, Standby Instrument Air Compressor OAV071(OB) Failed to Start.Caused by Breaker of Insufficient Amp Size.Proper Breaker Installed (← links)
- 05000295/LER-1981-014, Forwards Updated LER 81-014/03L-1 (← links)
- 05000295/LER-1981-013-03, Standby Instrument Air Compressor OAV071(OB) Failed to Start.Caused by Tripped Circuit Breaker.Breaker Found to Be Improper Amp Size. Proper Breaker Installed (← links)
- 05000295/LER-1981-013, Forwards Updated LER 81-013/03X-1 (← links)
- 05000295/LER-1980-050-03, /03L-0:on 801117 During Normal Operation,Fire Sump Process Radiation Monitor ORT-PR25 Increased to High Alarm. Cause Undetermined.Monitor Tested & Returned to Svc (← links)
- 05000295/LER-1980-050, Forwards LER 80-050/03L-0 (← links)
- 05000295/LER-1980-006-01, During Normal Operation, Surveillance of Auxiliary Bldg Ventilation Sys Revealed Inoperable Charcoal Filters.Caused by Improper Installation of Dampers Controlling Fuel Bldg Ventilation Paths (← links)
- 05000295/LER-1980-048-03, /03L-0:on 801016,during Normal Operation,Calibr of Rad Monitors 1 & 2 Was Not Completed within 6-month Calibr Interval.Caused by Delay in Delivery of Calibr Gas (Kr-85) by Vendor.Personnel Reinstructed on Procedures (← links)
- 05000295/LER-1980-048, Forwards LER 80-048/03L-0 (← links)
- 05000295/LER-1980-003-03, /03L-0:on 800802,after Ob Lake Discharge Tank Release Was Started,Personnel Noted That Liquid Release Form Did Not Include Sample Taken After 2,000 Gallons of Wastewater Were Added.Caused by Poor Communications (← links)
- 05000295/LER-1980-004-03, /03L-0:on 800802,6000 Gallons of Oa Lake Discharge Tank Discharged Into Lake.Caused by Valve Being Left Open.To Prevent Recurrence Discharge Valves Have Been Caution Carded (← links)
- 05000295/LER-1980-003, Forwards LER 80-003/03L-0 (← links)
- 05000295/LER-1980-031-03, /03L-0:on 800718,during Normal Operation, Auxiliary Bldg Area Monitor ORT-AR09 Failed Low.Caused by Slight Drift in Monitor Electrical Zero Point.Zero Point Adjusted & Monitor Functionally Tested & Returned to Svc (← links)
- 05000295/LER-1980-031, Forwards LER 80-031/03L-0 (← links)
- 05000295/LER-1980-036-03, /03L-0:on 800711,during Normal Operation,Pzr Level Channel 1L-460 Found Below Tech Specs.Caused by Zero Shift on Transmitter 1LT-460 (Barton Model 386).Zero Adjusted on Transmitter.Channel Returned to Svc (← links)
- 05000295/LER-1980-036, Forwards LER 80-036/03L-0 (← links)
- 05000295/LER-1981-007-03, /03L-0:on 800724,50.59 Evaluation Was Not Performed Prior to tie-in Into safety-related Pipe.Caused by Personnel Error.Personnel Reinstructed (← links)
- 05000295/LER-1981-007, Forwards LER 81-007/03L-0 (← links)
- 05000295/LER-1980-051-03, /03L-0:on 801115,high Pp Air Flow on Zone 2 Caused Zone Pressure to Fall Below 47 Psig,Putting Pp Sys in Degraded Mode.Caused by Hole in Purge Duct Allowing Cold Air to Enter Purge Exhaust Valve,Causing Matl to Contract (← links)
- 05000304/LER-1979-004, Forwards LER 79-004/03L-0 (← links)
- 05000304/LER-1979-008-03, /03L-0 on 790209:when Closing MSIV 2D for Steam Generator Cleanup,Valve Began to Close,Then Reopened.Caused by Failure of Both DC Solenoid Valves to Shift When Energized.After Exercise,One Valve Replaced (← links)
- 05000304/LER-1979-008, Forwards LER 79-008/03L-0 (← links)
- 05000295/LER-1979-007-03, /03L-0 on 790204:OA Lake Discharge Tank Failed to Close Automatically When Activity Reached Setpoint.Caused by Faulty Electrical Relay.Contacts Cleaned & Relay Card Securely Reconnected.Monitor Functionally Tested & Verified (← links)
- 05000304/LER-1979-009-03, /03L-0 on 790210:MSIV Partially Opened.Hydraulic Pump Was Reenergized,Causing MSIV to Reclose.Cause Was Combination of Drain Valve Not Opening After MSIV Closure & Open Accumulator Leaking Gas (← links)
- 05000304/LER-1979-009, Forwards LER 79-009/03L-0 (← links)
- 05000304/LER-1979-010-03, /03L-0 on 790214:Channel 2LT-460 Greater than 6% from Channel 2LT-461.Caused by Transmitter Had Zero & Span Shifted.Zero Adjustment Made,Transmitter Conservative for High & Low Level Trips (← links)
- 05000304/LER-1979-010, Forwards LER 79-010/03L-0 (← links)
- 05000295/LER-1979-004-03, /03X-1 on 790112:inverter 114 Tripped & Could Not Be Reset;Hot Shutdown Not Reached within 4-h.Caused by Loose Contact in DC Breaker & Personnel Error in Late Start of Shutdown.Breaker Will Be Fixed,Personnel Reinstructed (← links)
- 05000295/LER-1979-004, Forwards LER 79-004/03X-l (← links)
- 05000295/LER-1979-066-03, /03L-0:on 790909,steam Flow Channel Found Indicating Lower than Redundant.Caused by Failed Oscillator Casket.Failed Oscillator Replaced,Transmitter Recalibr & Returned to Svc (← links)
- 05000295/LER-1979-066, Forwards LER 79-066/03L-0 (← links)
- 05000304/LER-1979-032-03, /03L-0 on 790508:after Reactor Trip,Train a Reactor Trip Breaker Failed to Open.Caused by Plunger Out of Adjustment in Undervoltage Coil (← links)
- 05000304/LER-1979-032, Forwards LER 79-032/03L-0 (← links)
- 05000295/LER-1979-032-03, /03L-0 on 790420:blower Tripped on Containment Vent Particulate Monitor,Resulting in Low Flow.Caused by Thermal Overload Due to Dust Blocking Pump Vent.Vent Cleaned & Monitor Tested & Returned to Svc (← links)
- 05000295/LER-1979-032, Forwards LER 79-032/03L-0 (← links)
- 05000304/LER-1979-031, Forwards LER 79-031/03L-0 (← links)
- 05000304/LER-1979-029-03, /03L-0 on 790423:during Change of Startup Batteries on 2C CS Pump,Spray Sys Was Inadvertently Rendered Inoperable W/O Performing Required Surveillance.Caused by Personnel Error in Operating multi-position Switch (← links)
- 05000304/LER-1979-029, Forwards LER 79-029/03L-0 (← links)
- 05000295/LER-1979-040-03, /03L-0 on 790523:during Periodic Testing,Steamline Isolation Signal Developed on Train A.Msiv 1B Failed to Close.Caused by Dc Solenoid Directional Control Valve Sticking in de-energized Position.Valve Replaced (← links)
- 05000295/LER-1979-041-03, /03L-0 on 790522:during Normal Operation Pressurizer Spray Valves Opened to 50% Demand & RCS Pressure Decreased Below Tech Spec Limit.Caused by Operator Bumping Potentiometer on Pressurizer Master Controller (← links)
- 05000295/LER-1979-041, Forwards LER 79-041/03L-0 (← links)
- 05000295/LER-1979-017-04, /04T-0 on 790314:boron Usage Exceeded Tech Spec Limits Between 790310 & 14.Caused by Drummed Radioactive Waste Consisting of Borated Water.Usage Has No Bearing on Water Quality Program (← links)
- 05000304/LER-1979-002-03, /03L-0 on 790107:during Surveillance,Bus 238 Transformer Feed Failed to Auto Reclose When re-energized. Caused by Dirty Relay Contacts (← links)
- 05000304/LER-1979-002, Forwards LER 79-002/03L-0 (← links)
- 05000295/LER-1979-002-03, /03L-0 on 790108:blower of 1RE-0011,containment Vent Particulate Monitor,Tripped.Caused by Fuse Failure in Control Room Monitor (← links)
- 05000295/LER-1979-005, Forwards LER 79-005/03L-0 (← links)
- 05000295/LER-1979-006, Forwards LER 79-006/01T-0 (← links)
- 05000295/LER-1979-009-03, /03L-0 on 780930:quarterly Average Gaseous Release Rate Was Twice Annual Objective But Less than Tech Spec Max. Caused by Reactor Headvent During Refueling & Conservative Quantification Methods (← links)
- 05000295/LER-1979-009, Forwards LER 79-009/03L-0 (← links)
- 05000295/LER-1979-003-01, /01T-0 on 790109:Westinghouse Results of Feb 1978 ECCS Model Analysis Determined That Fq Limit Should Be 1.86 Rather than the Current Limit of 2.02.Plant Operations Modified to Adhere to New Limit (← links)
- 05000295/LER-1979-003, Forwards LER 79-003/01T-0 (← links)
- 05000295/LER-1979-079-03, /03L-0:on 791023,during Refueling,Auxiliary Bldg Area Radiation Monitor Repeatedly Failed Low.Caused by Broken Restraining Clamp on Photomultiplier Tube.Clamp Replaced.Monitor Functionally Tested & Restored to Svc (← links)
- 05000295/LER-1979-076-03, /03L-0:on 791010,while Performing Refueling Surveillances,Reactor Coolant Flow Transmitter 1FT-444 Shifted High.Caused by Zero Shift.Transmitter Recalibr Using New Technique to Correct Drift & Zero Shift Problem (← links)
- 05000295/LER-1979-076, Forwards LER 79-076/03L-0 (← links)
- 05000295/LER-1979-051-03, /03L-0 on 790718:fuel Monitor 1RT-PR27 Failed Sporadically.Caused by Corroded Contact Pins in Control Room Module Connector.Pins Replaced W/No Further Repairs Required (← links)
- 05000295/LER-1979-051, Forward LER 79-051/03L-0 (← links)
- 05000295/LER-1979-012, Forwards LER 79-012/99X-0 (← links)
- 05000304/LER-1979-034-03, /03L-0 on 790511:following Testing of O Diesel Generator,Starting Air Sys Leak Bleed Down & Starting Air Receivers.Caused by Loose Cap Screws Holding Valve Seat to Seat Retainer.Valve Seat Replaced & Fastened Correctly (← links)
- 05000295/LER-1979-093-03, /03L-0:on 791225,radioactivity Analysis of Fire Sump Discharge Sample Was Overlooked While Units Were in Cold Shutdown.Caused by Personnel Error.Computerized Sys to Provide Daily Monitoring Will Be Implemented (← links)
- 05000295/LER-1979-093, Forwards LER 79-093/03L-0 (← links)
- 05000295/LER-1979-092-03, /03L-0:on 791206,during Refueling,Gas Decay Tank Rad Monitor ORT-PRO2B Alarmed When Indicator Needle Read Below Alarm Setpoint.Caused by Accidental Jarring of Module, Dislodging Needle from Jewel Bearing.Meter Replaced (← links)
- 05000295/LER-1979-091-03, /03L-0:on 791207,during out-of-svc Surveillance for Gas Decay Tank Cubicle Radiation Monitor ORT-PR02B,shift Grab Sample Not Taken.Caused by Negligence of Radioactive Protection Group.Shifts Reinstructed (← links)
- 05000295/LER-1979-094-01, /01T-0:on 791228,pH of Effluent from Waste Water Treatment Facility Measured in 4.1-4.77 Range.Caused by Acidic Solution Leak in Waste Neutralization Tank Via Bad Packing Glands.Tank Neutralized (← links)