Pages that link to "05000369/LER-2005-001, Re Reactor Coolant System Leakage Detection Instrumentation Inoperable"
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The following pages link to 05000369/LER-2005-001, Re Reactor Coolant System Leakage Detection Instrumentation Inoperable:
Displayed 14 items.
- 05000369/LER-2005-001 (redirect page) (← links)
- 05000287/LER-2005-002 (← links)
- 05000265/LER-2005-002 (← links)
- 05000369/LER-2001-001 (← links)
- 05000263/LER-2005-004 (← links)
- IR 05000369/2005003 (← links)
- 05000369/LER-1993-003, Forwards LER 93-003-00 Re Problem Investigation Process 0-M93-0198 Covering Past Inoperability of Train B of CR Ventilation Sys Due to Possible Fabrication/Installation Deficiency (← links)
- 05000369/LER-1982-052, Forwards LER 82-052/03L-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1982-049, Forwards LER 82-049/03L-0 (← links)
- 05000369/LER-1982-053, Forwards LER 82-053/03L-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1982-051, Forwards LER 82-051/03L-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1982-050, Forwards LER 82-050/03L-0 (← links)
- 05000369/LER-1982-047, Forwards LER 82-047/03L-0 (← links)
- 05000369/LER-1982-039, Forwards LER 82-039/01T-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1982-040, Forwards LER 82-040/03L-0 (← links)
- 05000369/LER-1982-038, Forwards LER 82-038/03L-0 (← links)
- 05000369/LER-1982-035, Forwards LER 82-035/03L-0 (← links)
- 05000369/LER-1982-036, Forwards LER 82-036/03L-0 (← links)
- 05000369/LER-1982-033, Forwards LER 82-033/03L-0 (← links)
- 05000369/LER-1982-021, Forwards LER 82-021/03L-0 (← links)
- 05000369/LER-1982-020, Forwards LER 82-020/03L-0 (← links)
- 05000369/LER-1982-034, Forwards LER 82-034/03L-0 (← links)
- 05000369/LER-1981-025, Forwards LER 81-025/01T-0 (← links)
- 05000369/LER-1982-070, Forwards LER 82-070/03L-0 (← links)
- 05000369/LER-1982-068, Forwards LER 82-068/03L-0 (← links)
- 05000369/LER-1982-069, Forwards LER 82-069/03L-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1982-063, Forwards LER 82-063/03L-0 (← links)
- 05000369/LER-1982-062, Forwards LER 82-062/03L-0 (← links)
- 05000369/LER-1982-061, Forwards LER 82-061/03L-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1981-019, Forwards LER 81-019/01T-0 (← links)
- 05000369/LER-1981-174, Forwards LER 81-174/03L-0 (← links)
- 05000369/LER-1982-060, Forwards LER 82-060/03L-0 (← links)
- 05000369/LER-1981-175, Forwards LER 81-175/03L-0 (← links)
- 05000369/LER-1981-176, Forwards LER 81-176/03L-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1982-058, Forwards LER 82-058/03L-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1982-054, Forwards LER 82-054/03L-0 (← links)
- 05000369/LER-1982-059, Forwards LER 82-059/03L-0 (← links)
- 05000369/LER-1982-055, Forwards LER 82-055/03L-0 (← links)
- 05000369/LER-1982-057, Forwards LER 82-057/03L-0 (← links)
- 05000369/LER-1983-004, Forwards LER 83-004/03L-0 (← links)
- 05000369/LER-1983-003, Forwards LER 83-003/03L-0 (← links)
- 05000369/LER-1982-082, Forwards LER 82-082/03L-0 (← links)
- 05000369/LER-1982-080, Forwards LER 82-080/03L-0 (← links)
- 05000369/LER-1982-078, Forwards LER 82-078/03L-0 (← links)
- 05000369/LER-1982-077, Forwards LER 82-077/03L-0 (← links)
- 05000369/LER-1982-074, Forwards LER 82-074/03L-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1982-076, Forwards LER 82-076/03L-0 (← links)
- 05000369/LER-1983-015, Forwards LER 83-015/03L-0 & 83-003/03L-0 (← links)
- 05000369/LER-1982-066, Forwards LER 82-066/03L-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1982-065, Forwards LER 82-065/03L-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1982-011, Forwards LER 82-011/03L-0 (← links)
- 05000369/LER-1982-009, Forwards LER 82-009/03L-0 (← links)
- 05000369/LER-1981-178, Forwards LER 81-178/03L-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1981-177, Forwards LER 81-177/03L-0 (← links)
- 05000369/LER-1981-179, Forwards LER 81-179/03L-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1982-075, Forwards LER 82-075/03L-0 (← links)
- 05000369/LER-1982-072, Forwards LER 82-072/03L-0 (← links)
- 05000369/LER-1991-014, Requests Delay for Submitting LER 91-014-00 Re Mispositioning of Valves,Causing Containment Spray & RHR Sys Inoperability from 911111 to 911211 (← links)
- 05000369/LER-1983-002, Forwards LER 83-002/03L-0 (← links)
- 05000369/LER-1982-079, Forwards LER 82-079/03L-0 (← links)
- 05000369/LER-1983-043, Forwards LER 83-043/01T-0 & 83-029/01T-0 (← links)
- 05000369/LER-1983-013, Forwards LER 83-013/03L-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1983-016, Forwards LER 83-016/03L-0 (← links)
- 05000369/LER-1983-014, Forwards LER 83-014/03L-0 (← links)
- 05000369/LER-1983-012, Forwards LER 83-012/03L-0 (← links)
- 05000369/LER-1984-025, Forwards LER 84-025-00 Re Open Vent Valve in Containment Spray Sys.Event Initially Determined to Be Not Reportable Due to Minimal Impact on Design Function.Event Determined Reportable Per Insp Rept 50-369/84-29 (← links)
- 05000369/LER-1984-022, Discusses LER 84-22 Describing Design Deficiency in Area of Seismic Qualification of Certain Fire Protection & Drain Piping Serving Control Room.Design Mod to Rectify Situation Will Be Completed by 851101 (← links)
- 05000369/LER-1983-009, Forwards LER 83-009/03L-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1983-010, Forwards LER 83-010/03L-0 (← links)
- 05000369/LER-1983-011, Forwards LER 83-011/01T-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1983-008, Forwards LER 83-008/03L-0 (← links)
- 05000369/LER-1982-048, Forwards LER 82-048/03L-0 (← links)
- 05000369/LER-1982-056, Forwards LER 82-056/01T-0 (← links)
- 05000369/LER-1982-007, Forwards LER 82-007/03L-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1982-010, Forwards LER 82-010/03L-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1982-008, Forwards LER 82-008/03L-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1983-006, Forwards LER 83-006/03L-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1983-007, Forwards LER 83-007/03L-0 (← links)
- 05000369/LER-1983-005, Forwards LER 83-005/03L-0.Detailed Event Analysis Encl (← links)
- 05000369/LER-1985-003, Advises of Delay of Commitment in LER 85-003 to Reroute Instrument Impulse Lines & to Heat Trace & Insulate by Dec 1985,due to Design & Matl Lead Times.Implementation of Mods Delayed Until 1986 Outage (← links)
- 05000369/LER-1998-006, Forwards LER 98-006-00 Re Noncompliance with TS SR 4.6.5.1b.3 Re Flow Passage Insp of Ice Condensers.Item 2 in Planned Corrective Action Subsection Is Only Regulatory Commitment Associated with Rept (← links)
- 05000369/LER-1996-005, Forwards Suppl Info Re LER 96-005,rev 1 Re TS Required Shutdown of Both Units Due to Failed Surveillance Test of Vital Battery Bank Evcc.Rev Changes Commitment Re Vital Battery Vank Evcc (← links)
- 05000369/LER-1983-117, Forwards Rev 1 to LER 83-117/03L-1.Rev Submitted in Same Format as Original,Per NUREG-1022,Suppl 1,Section 14.8. Incident Attributed to Design Oversight.Procedure Revised to Prevent Further Violation of Tech Spec 3.1.3.6 (← links)
- 05000369/LER-1981-181, Forwards Updated LER 81-181/03X-1.Detailed Event Analysis Encl (← links)
- 05000369/LER-1950-369, Submits Addl Info Re LER 50-369/82-66 Re Failures of Ventilation Unit Condensate Drain Tank Flow Totalizer. Differential Pressure Transmitter Replaced W/Fischer & Porter Liquid Vortex Flowmeter.Totalizer Functions Properly (← links)
- 05000369/LER-1989-004, Informs That LER 89-004 Re Steam Generator Tube Rupture on 890307 Will Be Delayed & Submitted No Later than 890420.Addl Calculations Re Leak Rate & Total Steam Leakage Required to Complete Rept (← links)
- 05000369/LER-1987-033, Informs That LER 87-33 Due on 880108 Delayed Due to Unresolved Concerns & Will Be Submitted on 880129 (← links)
- 05000369/LER-1998-004, Forwards LER 98-004-00 Re Missed Auxiliary Hoist Surveillance Prior to Drive Rod Latching.Event Is Considered to Be of No Significance W/Respect to Health & Safety of Public.Planned C/As in LER Are Regulatory Commitments (← links)
- 05000369/LER-1998-003, Forwards LER 98-003-00,re Inoperability of 1CF-30 During Unit 1 Cycle 12.Hydraulic Actuators for All of the Unit 1 Feedwater Isolation Valves Are Being Replaced W/Pneumatic Actuators During Current Refueling Outage (← links)
- 05000369/LER-1987-016, Informs That Unit 1 Did Not Exceed Indicated Rated Thermal Power & That LER 87-016 Will Not Be Submitted or Used in Future (← links)
- 05000369/LER-1998-002, Forwards LER 98-002-00,concerning Reactor Trip at McGuire Unit 1,per 10CFR50.73(a)(2)(iv)(A) (← links)
- 05000369/LER-1984-030, Suppl to LER 84-030:review Revealed Installation Error That Would Result in Failure of Upper Head Injection Accumulator Discharge Valves to Isolate on Low Level.Analysis of Safety Significance & Encl (← links)
- 05000369/LER-2022-001, Both Control Room Area Chilled Water System Trains Inoperable Due to Human Error (← links)
- 05000369/LER-2021-001, Valid Actuations of the Unit 2 B Train Emergency AC Power System and B Train Auxiliary Feedwater System (← links)
- 05000369/LER-2020-001, Condition Prohibited by Technical Specification 3.4.15, Reactor Coolant System (RCS) Leakage Detection Instrumentation (← links)
- 05000369/LER-1989-023, :on 890831,ESF Actuation Occurred When Nuclear Svc Water to Auxiliary Feedwater Isolation Valve Repositioned to Open.Caused by Improperly Following Correct Procedure.Signal to Valve 1CA-86 Cleared (← links)
- 05000369/LER-1989-003-04, :on 890301,discovered That One Channel of Doghouse Water Level Instrumentation for Trains a & B Not Being Tested as Required by Tech Specs 3/4.3.2.Caused by Defective Procedure (← links)
- 05000369/LER-1989-022-01, :on 890826,reactor Trip Occurred Because of Reactor Coolant Low Flow Signal That Interlocked W/ Permissive Signal.Caused by Equipment Failure/Malfunction. Recovery Procedure Implemented (← links)
- 05000369/LER-1989-020, :on 890727,discovered That Abnormal Degradation of Steel Containment Vessel Occurred.Caused by Corrosion Due to Standing Water in Annulus Area.Steel Containment Vessel Will Be Repaired & Recoated (← links)
- 05000369/LER-1989-021-01, :on 890623,discovered That Design of Sys Did Not Take Into Account temp-induced Difference in Pressure Gradients Inside & Outside Annulus.Caused by Design Deficiency.Sys Setpoint Mods Implemented (← links)
- 05000369/LER-1989-019-01, :on 890821,inadvertent ESF Actuation Occurred Due to Inappropriate Action & Defective Procedure.Procedure Changes Completed for Train a & Train B Diesel Sequencer Timer Calibr Procedures (← links)
- 05000369/LER-1989-012-01, :on 890608,ice Condenser Intermediate Deck Doors Declared Inoperable Due to Accumulation of Ice. Probably Caused by Overflow from Air Handling Units & Poor Housekeeping.Doors Freed & Propped Open (← links)
- 05000369/LER-1989-015-02, :on 890721,determined That Control Room Ventilation Sys Did Not Meet Required Tech Spec Positive Pressure of at Least +0.125-inches Water Gauge Relative to Outside Atmosphere.Caused by Design Oversight (← links)
- 05000369/LER-1989-009-01, :on 890421,ESF Actuation Occurred During Realignment of turbine-driven Auxiliary Feedwater Pump, Causing Pump Suction Pressure to Drop & Opening Valves. Caused by Improper Tagout Removal Procedure (← links)
- 05000369/LER-1988-049, :on 881123,RHR Pump 1B Lost Suction Pressure & Operations Manually Stopped Pump to Prevent Damage.Caused by Design Deficiency Because Inadequate Sys Venting Allowed Air to Be Trapped.Personnel Vented Nd Train 1A (← links)
- 05000369/LER-1988-048, :on 880822,noted That Shrinkage of Boraflex Neutron Absorbing Matl Could Cause Increase in Reactivity, Per NRC Info Notice 87-043.Caused by Design Deficiency.Util & Westinghouse Performed Analyses (← links)
- 05000369/LER-1989-006-03, :on 890330,discovered nonsafety-related Valve Positioner Leakage.Caused by Const Installation Deficiency Due to Improperly Installed Valve Positioner. Nonsafety-related Positioner Retubed (← links)
- 05000369/LER-1989-007-03, :on 890310,nonsafety-related Components Found Installed Between safety-related Solenoids & Operators.Cause of Event Not Revealed.Procedure Changed to Require Valves Verification 30 Minutes After Seismic Event (← links)
- 05000369/LER-1988-036, :on 881118,third Test on Vg Header a Did Not Conclude Past Operability Because Blackout Header Loads During Blackout Conditions Are Unknown.Caused by Design Deficiency.Vg Sys Will Be Upgraded (← links)
- 05000369/LER-1989-014, :on 890713,discovered That Part of Tech Spec 3.12.2 Re Land Use Census Never Fulfilled.Caused by Mgt Deficiency Because of Poor Interface Between Groups.Meetings Held W/Radiation Protection Personnel (← links)
- 05000369/LER-1989-017-01, :on 890714,wiring for Annulus Ventilation Filter Unit Preheater Had Unqualified Teflon Jacket.Caused by Mfg Defect Due to Matl Deficiency.Procedures Changed & Training Upgraded.Part 21 Related (← links)
- 05000369/LER-1989-014-02, :on 890713,discovered That Land Use Census Tech Spec 3.12.2 Requirement Not Completely Fulfilled.Caused by Mgt Deficiency & Poor Interface Between Groups.Meetings Held W/Personnel to Clarify Responsibilities (← links)
- 05000369/LER-1989-016-01, :on 890714,loss of Flow Alarm for Unit Vent Radiation Monitor Received in Control Room & Radioactive Gas Sample Not Taken Every 12 H.Caused by Failure to Follow Procedures.Personnel Instructed (← links)
- 05000369/LER-1989-006, :on 890330,discovered That nonsafety-related Valve Positioner Placed Between safety-related Solenoid & Valve Actuator.Caused by Design Deficiency.Work Request Issued to Retube Air Supplies to Valve (← links)
- 05000369/LER-1989-011-02, :on 890530,radwaste Facility Ventilation Sys Declared Inoperable.Caused by Inappropriate Action Due to Operator Declaring Wrong Component Operable.Personnel Reinstructed (← links)
- 05000369/LER-1989-008-03, :on 890410,discrepancy in Amount of Diesel Generator Fuel Oil Between Tech Specs & FSAR Identified. Operations Personnel Administratively Raised Min Allowable Vol to 39,500 Gallons (← links)
- 05000369/LER-1989-004-03, :on 890307,steam Generator Tube Rupture Occurred,Resulting in Declared Alert.Caused by Rupture of Single Tube in Steam Generator B.Plan for Addressing Tube Failure Currently Being Implemented (← links)
- 05000369/LER-1988-040, :on 881025,observed Air Leaking Through Penetration Into Containment Bldg.Caused by Defective Procedure Due to Mgt/Qa Deficiency & Inappropriate Action. Procedure PT/0/A-4700/48 Changed (← links)
- 05000369/LER-1989-013-02, :on 890630,flow Indication for Steam Generator C Failed High & on 890705,alarm for 3% Deviation Received During Power Escalation.Caused by Inappropriate Action & Procedure Deficiency.Training Implemented (← links)
- 05000369/LER-1989-005-02, :on 890309,charging Pump Recirculation Valves Not Being Tested,Per Inservice Test Requirement.Caused by Inappropriate Action.Performance Personnel Submitted Rev to Inservice Test Submittal (← links)
- 05000369/LER-1989-010-02, :on 890515,station Mgt Personnel Determined That Main Feedwater & Auxiliary Feedwater Isolation Valves Were Potentially Inoperable.Caused by Mfg Deficiency.Valves Closed & Power Removed (← links)
- 05000369/LER-1989-002-05, :on 890223 & 24,design Basis Nuclear Svc Water Flow to Control Area Chilled Water Sys Cannot Be Justified. Caused by Personnel Failure to Adhere to Station Directives. Personnel Procedure Completed (← links)
- 05000369/LER-1987-015-02, :on 870727,fire/flood Barrier Between Diesel Generator & Diesel Lube Oil Holding Tanks Room Breached. Caused by Personnel Error.Personnel Counseled (← links)
- 05000369/LER-1987-014-01, :on 870730,control Power Circuit Breaker for Diesel Generator 1A Found Inoperable.Caused by Personnel Error.Policies Revised on Use of Safety Tagging Programs (← links)
- 05000369/LER-1987-027, :on 871029,valve IRN-235B Found Leaking.Work Requests Initiated to Repair Seat Leak & Rebuild & Bench Test Operator.On 871119,discovered That Retest of Valve Not Performed.Caused by Personnel Error (← links)
- 05000369/LER-1987-013-02, :on 870729,unit Entered Tech Spec 3.0.3 When Reactor Coolant Loop a Flow Transmitter Signals Blocked to Facilitate Transmitter Replacement.Transmitter Replaced & & Signal Block Removed (← links)
- 05000369/LER-1987-012-02, :on 870709,diesel Generator Load Sequencer 1A Actuated in LOCA Mode During Routine Periodic Test of Slave Relays in Solid State Protection Sys.Caused by Defective Procedures.Slave Relay Test Procedures Revised (← links)
- 05000369/LER-1987-029-02, :on 871119,RCS Leakage Calculation Result Greater than 1 Gpm Noted,Due to Packing Leak on Charging Pumpdischarge Control Valve.Caused by Improper Packing Procedure.Improvement Program Underway (← links)
- 05000369/LER-1987-030-02, :on 870908,supply Valve to Diesel Generator 1B (DG) from Fuel Oil Storage Tank 1B Mistakenly Closed Due to Mislabelled Reach Rods,Leaving DG Inoperable.Caused by Error in Procedure Valve Checklist.List Corrected (← links)
- 05000369/LER-1987-014, :on 870730,control Power Circuit Breaker for Diesel Generator 1A Discovered Open,Rendering Generator Inoperable.Diesel Generator Inoperable for Approx 3 Days. Caused by Personnel Error (← links)
- 05000369/LER-1987-028, :on 871120,decreased Flow Through Steam Generator (SG) Feedwater Control Valve Bypass Led to Manual Activation of Auxiliary Feedwater Sys to Avoid Trip on Low SG 1D Level.Cause Unknown.Valve Checked (← links)
- 05000369/LER-1998-005-02, :on 980714,noted That Two Auxiliary Bldg Filtered Ventilation Exhaust Systems Were Inoperable Longer than Action Time Per TS 3.7.7.Caused by Personnel Error.Will Revise Procedures to Provide Guidance (← links)
- 05000369/LER-1987-026-02, :on 871105,control Area Ventilation & Chilled Water Sys Train a Declared Inoperable.Caused by Degradation of Control Room Door Seals & Mgt Deficiency.Seals Repaired & Preventive Maint Program to Be Established (← links)
- 05000369/LER-1987-025-02, :on 871025,pressurizer (Pzr) Dissolved Oxygen (Do) Not Verified to Be within Tech Spec Limits.Caused by Insufficient Communications to Ensure Pzr Do Verified to Be within Tech Spec Limits.Personnel Trained (← links)
- 05000369/LER-1998-004-02, :on 980619,discovered Missed Auxiliary Hoist Surveillance Prior to Rod Drive Latching.Caused by Inadequate Work Practices.Suspended Drive Rod Latching, Completed Load Test & Resumed Drive Rod Latching (← links)
- 05000369/LER-1987-024-02, :on 871002,gap Around Top Sealing Surface of Reactor Bldg Equipment Hatch Discovered.Caused by Inadequate Procedural Instructions & Insufficient Administrative Controls.Procedures to Be Revised (← links)
- 05000369/LER-1987-021-01, :on 870916,facility Blackout Occurred Due to Relays Energizing During Testing.Caused by Personnel Error. Busline 1B Stabilized.Evaluation of Compressor Alignments VI & Design Review of Power Supply Initiated (← links)
- 05000369/LER-1987-023-02, :on 871001,control Room Ventilation/Chilled Water Trains a & B Chillers Declared Inoperable.Train a Trip Caused by Blown Fuse.Train B Trip Caused by Failure of Actuator Microswitch.Fuse Replaced (← links)
- 05000369/LER-1998-003-02, :on 980529,inoperability of 1CF-30 During Unit 1 Cycle 12 from 970906-1117,occurred.Caused by Improper Valve Assembly.Valve Logged Inoperable Under Requirements of TS 3/4.6.3 & Operators Entered Action Statement (← links)
- 05000369/LER-1987-020-02, :on 870905,RHR Pump B Declared Inoperable Due to Isolation of Flow Instrument.Caused by Personnel Failing to Assure Instrument Properly Returned to Svc After 870828 Repair of Leak.Instrument Unisolated (← links)
- 05000369/LER-1987-022-02, :on 870921,during Annual Fire Protection Audit, Breached Fire Blanket Discovered.Caused by Personnel Not Recognizing Blanket as Fire Barrier.Breach in Barrier Repaired & Fire Blanket Restored (← links)
- 05000369/LER-1988-017, :on 880702,limit Switch Associated W/Upper Containment Ventilation Unit Isolation Valve Discovered W/Pinched Gasket.Caused by Defective Procedure.All Limit Switches Repaired & Procedure Changed (← links)
- 05000369/LER-1987-019, :on 870904,auxiliary Feedwater Autostart Occurred.Caused by Defective Procedure Due to Insufficient Instructions to Prevent Loss of Both Main Feedwater Pumps During Shutdown.Pump Control Valves Reset (← links)
- 05000369/LER-1987-011-02, :on 870610,leak Rate Testing of Containment Electrical Penetrations Not Performed.Caused by Inadequate Administrative Controls Surveillance Testing.Leak Rate Test Procedures Corrected (← links)
- 05000369/LER-1987-019-02, :on 870904,auxiliary Feedwater Autostart Occurred.Caused by Lack of Sufficient Procedural Instruction to Prevent Loss of Both Main Pumps During Shutdown. Procedures Will Be Revised & Pumps Repaired (← links)
- 05000369/LER-1989-030, :on 880915,discovered That Capped Spare Sleeves Through Fire Barrier Pentrations Were Unqualified as 3 H Fire Barriers.Caused by Design Deficiency Due to Incomplete Documentation.Fire Watches Established (← links)
- 05000369/LER-1989-001-03, :on 890117,failure to Take Compensatory Measures When Both Trains of Control Room Area Ventilation Were Inoperable.Caused by Lack of Attention to Detail by Planner a in Scheduling Pending Work Request (← links)
- 05000369/LER-1988-045, :on 881210 & 25,auxiliary Feedwater Sys Train B Inoperable.Caused by Mgt Deficiency & Personnel Error.Facility Mgt Personnel Met on 890127 to Review & Discuss Incident (← links)
- 05000369/LER-1988-005, :on 880323,spurious Train a Safety Injection & Main Steam Isolation Resulting in Reactor Trip Occurred. Cause Undetermined.Operations Personnel Implemented Procedure AP/1/A/5500/01 (← links)
- 05000369/LER-1988-044, :on 881211,two Safety Injection Check Valves Failed RCS Pressure Isolation Valve Leak Rate Test.Caused by Worn Hinge Pin Causing Valve Disc to Seat Improperly & Worn Areas on Valve Seat.Valves Replaced (← links)
- 05000369/LER-1987-018-02, :on 870824,determined Flow Instrument Calibrs for Nuclear Svc Water Pumps 2A & 2B Incorrect.Caused by Inadequate Mgt Review of Procedures That Require Changes. Discharge Flow Loop Calibr Changed (← links)
- 05000369/LER-1987-031-01, :on 871125,Tech Spec 3.0.3 Entered When Both Component Cooling HXs Declared Inoperable.Caused by Equipment Failure.Valve IRN-89 Administratively Blocked Open (← links)
- 05000369/LER-1987-032-01, :on 871108,damaged Fire Barrier Discovered on Auxiliary Feedwater Sys Valve Actuator.Cause Unknown.Fire Barrier Repaired on 871113.Addl Corrections from Previous LERs Underway (← links)
- 05000369/LER-1997-008-01, Has Been Cancelled Per 10CFR50.73 (← links)
- 05000369/LER-1997-009, :on 970906,reactor Trip Occurred on Both Units Due to Loss of non-vital Power to Plant components.Re-closed Breaker MKA-1B,restored Kxa to Svc,Replaced Breaker MKA-1B & Repaiared Cable Connection (← links)
- 05000369/LER-1990-026-01, :on 901012,determined That Both Trains of Annulus Ventilation Sys Rendered Inoperable & Judged to Be Unable to Create Required Negative Pressure in Annulus within Required Time (← links)
- 05000369/LER-1998-002-01, :on 980209,manual RT Following Fuse Failure in Rod Control Sys Was Noted.Caused by Intermittent Loss of Power to Rod Control Gripper Mechanism.Fuse Holder Was Replaced (← links)
- 05000369/LER-1986-018-02, :on 860924 & 25,high Pressure Reactor Trip Occurred.Caused by Turbine Control Sys Malfunction. Troubleshooting & Testing Performed on Digital Electrohydraulic Turbine Control Sys (← links)
- 05000369/LER-1987-010-02, :on 870509,pressure Switch on Auxiliary Feedwater motor-driven Pump 1A Suction Discovered Out of Calibr.Caused by Personnel Error.Personnel Will Be Retrained on Recognizing & Compensating for Water Legs (← links)
- 05000369/LER-1986-014-03, :on 860818,ESF Train B Safety Injection Signal Actuated from Pressurizer Safety Injection Low Pressurizer Pressure Signal.Caused by Defective Procedure.Procedure Change Implemented (← links)
- 05000369/LER-1986-015-03, :on 860819,discovered That Required Surveillance on source-range Neutron Flux Monitors Missed & Operational Test for source-range Neutron Flux Monitor Not Performed on 860803 (← links)
- 05000369/LER-1986-009-01, :on 860507,determined That Electric Motor Operators for Unit 1 Valve 1NI-10 & Unit 2 Valves 2NI-9 & 2NI-10 Insufficiently Sized to Guarantee Opening.Temporary Mod Made (← links)
- 05000369/LER-1987-009-02, :on 870415,reactor Tripped Due to Turbine Tripped Signal Generated While Station Personnel Testing Turbine auto-stop Oil Pressure Switch.Caused by Design Deficiency.Preventive Maint Code Changed (← links)
- 05000369/LER-1987-008-02, :on 870409,monthly Channel Checks on Reactor Vessel Level Instrumentation Sys Not Performed.Caused by Defective Procedure.Operations Revised Monthly Surveillance Items Procedures (← links)
- 05000369/LER-1986-019-02, :on 861014,failure to Perform Nuclear Svc Water Valve Stroke Timing Quarterly Periodic Test within Required Interval Discovered.Caused by Mgt Deficiency Due to Inadequate Administrative Controls (← links)
- 05000369/LER-1986-018, :on 860924,high Pressure Reactor Trip Occurred Due to Turbine Control Sys Malfunction.Cause Unknown. Troubleshooting & Monitoring of Turbine Control Sys Will Continue (← links)
- 05000369/LER-1987-003-03, :on 870130,containment Air Return Fans Declared Inoperable.Caused by Inadequate Administrative Controls Resulting in Removal of Water Curbs W/O Reinstallation.Curbs Replaced.Procedures Will Be Revised (← links)
- 05000369/LER-1986-013-02, :on 860626,discovered Loose Fuel Pellets from Fuel Assembly D-03 on Reactor Core Baffle Plate Near Core Location P-3.Caused by Baffle Jetting.Assembly Removed from Core & Core Redesigned (← links)
- 05000369/LER-1986-020-03, :on 861028,charging Line Outside Containment Isolation Valves Declared Inoperable Due to Incorrect Torque Settings on Rotork Motor Operators.Caused by Mfg Deficiency. Procedures Revised & Operators Evaluated (← links)
- 05000369/LER-1986-011-02, :on 860605,diesel Generator 1A Automatically Started Due to Train a Blackout Actuation.Caused by Design Deficiency.Ite 27H-type Relays on 4,160-volt Switchgear Group 1ETA Replaced (← links)
- 05000369/LER-1987-002-01, :on 861230,Trains 1A & B of Containment Spray Sys Declared Inoperable.Caused by Senior Reactor Operator Misunderstanding Impact of Containment Spray Sys in Test Mode.Appropriate Training Will Be Reiterated (← links)
- 05000369/LER-1986-016-03, :on 860902,RCS Pressurizer Code Safety Relief Valve 1NC-1 Lifted W/Sys Pressure Below Required Relief Setpoint.Caused by Incorrect Setup of Valve.Valve 1NC-1 Replaced & Valve 1NC-2 Adjusted (← links)
- 05000369/LER-1987-001, :on 870107,Train B Chiller for (Shared) Control Area Ventilation/Chilled Water Sys Tripped on Refrigerant Low Temp.Caused by Chiller Thermostat Setting Positioned Too Cold.Train B Switch Manually Reset (← links)
- 05000369/LER-1986-007-01, :on 860325,reactor Tripped on Steam Generator Lb lo-lo Level Signal.Caused by Failure of Bussman Fuses. Indicating Fuses Will Be Replaced W/Nonindicating Fuses (← links)
- 05000369/LER-1985-019-01, :on 850530,cable Transits Penetrating Units 1 & 2 Reactor Bldg Walls Discovered to Be Fire Barriers.Caused by Oversight During Development of Fire Barrier Insp Procedure.Procedures Revised (← links)
- 05000369/LER-1987-006-01, :on 870310,control Area Ventilation & Chilled Water Sys Train B Declared Inoperable Due to Chiller Trip. Caused by Personnel Error.Work Request Initiated to Investigate & Repair Position Indication (← links)
- 05000369/LER-1987-007-02, :on 870317,incorrect Actuation Tubing Connections on Halon Fire Suppression Sys Discovered.Caused by Failure of Procedure to Ensure That Tubing Was Properly Reconnected.Tubing Connections Corrected (← links)
- 05000369/LER-1986-009-03, :on 860507 & 0608,motor-operated Valves Found W/Undersized Operators & Torque Switch Settings Incorrectly Set.Caused by Design Deficiency & Personnel Error.Operators Replaced.Torque Setting Data Base Changed (← links)
- 05000369/LER-1988-015-02, :on 880626,incoming Feeder Breaker to Shared Motor Control Center (MCC) Smxl Tripped.Caused by Design Deficiency at Shared MCC Smxl.Power Supplies for Main Feedwater Pump Suction Flow Transmitters Moved (← links)
- 05000369/LER-1987-006-02, :on 870310,control Area Ventilation & Chilled Water Sys Train B Chiller Tripped While Train a Inoperable. Caused by Failure to Verify Valve 2RN-43A Open.Train B Chiller Restarted & Declared Operable (← links)
- 05000369/LER-1988-030, :on 880915,operations Declared 96 Spare Sleeves Through Fire Barrier Penetrations W/Pipe Caps Installed on One End Inoperable.Caused by Design Deficiency Because of Incomplete Test Documentation (← links)
- 05000369/LER-1999-001, (S)-00:on 990317,discovered Unescorted Access Authorization of Contract Employee Falsely Obtained.Caused by Employee Willful Falsification of Info.Employee Unescorted Access Was Terminated on 990317 (← links)
- 05000369/LER-1987-005-02, :on 870224,battery Charger Room Fire Walls Declared Inoperable Due to Walls Not Meeting NRC Commitment Re Boundary Specs.Caused by Improper Const of Walls.Const & QA Requirements Established (← links)
- 05000369/LER-1999-001-04, :on 990306,TS SR for Ice Condenser Lower Inlet Doors Was Not Met.Caused by Failure to Recognize That Recorded Valve Was Outside Acceptance Criteria.Mgt Reinforced Expectations for Procedure Performance & Review (← links)
- 05000369/LER-1988-024, :on 880912,unit Entered Tech Spec 3.0.3 When Train a of ECCS & Train B of Component Cooling Sys Were Inoperable.Component Cooling 1B HX Failed Performance Test Because of Seasonal Environ Factors (← links)
- 05000369/LER-1987-004-03, :on 870218,reactor Tripped Due to Low RCS Flow. Caused by Failed Surge Capacitor Resulting in Reactor Coolant Pump Motor 1C Tripping on Ground Fault.Surge Capacitor Replaced (← links)
- 05000369/LER-1988-028, :on 880912,main Steam Isolation by-pass Valve Safety Solenoid Installed in Wrong Location.Caused by Design Deficiency.Operations Personnel Closed Main Steam Sys Isolation Bypass & Isolated Air Supply Valves (← links)
- 05000369/LER-1985-027-01, :on 850911,pressurizer Heater Group 1B Inoperable While Diesel Generator 1A Inoperable.Caused by Personnel Error.Generator Returned to Operable.Rept Will Be Reviewed W/Personnel (← links)
- 05000369/LER-1986-012-02, :on 860703,Trains a & B of Chilled Water & Control Ventilation Sys Declared Inoperable.Caused by Design & Mgt Deficiencies.Control Room High Temp Procedure Implemented & Oil Added to Train B Chiller (← links)
- 05000369/LER-1988-026-03, :on 880902,ECCS Sys Permissive Interlock Rendered Nonfunctional Due to Improperly Wired Limit Switch. Caused by Breakdown of Functional Verification Program. Resident NRC Personnel Notified (← links)
- 05000369/LER-1988-023-01, :on 880912,discovered That Snubber on Nuclear Sampling Sys Piping & Chemical & Vol Control Sys Inadvertently Omitted from Snubber Visual Insp List.Caused by Lack of Administrative Controls on List (← links)
- 05000369/LER-1988-025-01, :on 880829,electrical Link I-1 Found in Open Position & Functional Verification for Mod Failed to Ensure Link I-1 Closed.Caused by Mgt Deficiency.Link I-1 Closed & Maint Mgt Procedure 1.3 Replaced w/1.6 (← links)
- 05000369/LER-1986-017-03, :on 860911,both Trains of Hydrogen Mitigation Sys Determined Inoperable During Surveillance Testing.Caused by Failure of Several Hydrogen Ignitors.Accessible Ignitors Replaced.Test Box Built (← links)
- 05000369/LER-1986-009, :on 860507,electric Motor Operators for Unit 1 Valve 1NI-10 & Unit 2 Valves 2NI-9 & 2NI-10 Determined Insufficiently Sized to Guarantee Opening Under Worst Case Design Conditions (← links)
- 05000369/LER-1998-001-01, :on 980128,inadvertent Removal of Fwst Channel from Tripped Condition & Cpcs Channel from Start Permissive Condition.Caused by Inadequate Procedures.Procedures Were Placed on Hold Pending Evaluation for Improved Guidance (← links)
- 05000369/LER-1997-011, :on 971111,SSPS Surveillance Testing Was Noted to Be Inadequate.Caused by Inadequate Test Design Supplied by Vendor.Sps for Ssps Trains Were Revised (← links)
- 05000369/LER-1986-010-02, :on 860604,during Testing of Gaseous Activity Monitor,Trip 2 Logic Would Not Isolate Containment Purge (VP) Sys,Violating Tech Spec 3.3.3.9.Caused by Defective Procedure.Changes Incorporated in Procedure (← links)
- 05000369/LER-1997-010, :on 971023,determined That Potential Existed for Inadequate Margin to Be Maintained W/Regard to RCS Flow Rate Due to Analysis Deficiency.Ts Change Will Be Submitted to Eliminate Potential non-conservatism (← links)
- 05000369/LER-1990-027, :on 901013,solid State Protection Sys General Warning of Reactor Trip Occurred Due to Equipment Failure (← links)
- 05000369/LER-1996-005-01, :on 961101,TS Required Shutdown of Both Units Due to Failed Surveillance Test of Vital Battery Evcc.Caused Is Unknown.Replaced & Retested Vital Battery Bank Evcc (← links)
- 05000369/LER-1997-002, :on 970313,FWIVs Were Declared Inoperable Due to Hydraulic Oil Degradation.Solenoid Coils & Plungers Were Replaced or Cleaned (← links)
- 05000369/LER-1988-032, :on 881012,annulus Ventilation Sys Inoperable Due to Door Seal Failure Resulting in Unit 1 Remaining in Hot Standby for Over Required 7 H.Caused by Personnel Error & Mgt Deficiency.Seals on Doors Repaired (← links)
- 05000369/LER-1987-035-01, :on 870611,computer Logs Indicated That Unit May Have Operated Above Rated Thermal Power as Defined in Tech Spec.Caused by Number of Decimal Places Used to Adjust Plant Output Were Rounded Off (← links)
- 05000369/LER-1987-034-01, :on 871109,discovered Two Fire Doors Blocked Open & Fire Watch Missed.Caused by Personnel Error.Fire Door Closed & Mechanical Maint (Mnt) Will Establish Log Book for Tech Spec Items Under Mnt Responsibility (← links)
- 05000369/LER-1988-009, :on 880518,inadverent ESF Actuation from Train B Diesel Generator Load Sequencer Occurred.Caused by Personnel Error.Operations Personnel Stopped Pumps 1B CA & 1B Rn & Chiller B VC (← links)
- 05000369/LER-1988-027, :on 880904,failure to Stroke Time Test Valves 1NV-458A & 1NV459A Prior to Entering Mode 4.Caused by Mgt Deficiency Due to Inadequate Policy.Actions to Enhance Scheduling to Prevent Missed Tests Planned (← links)
- 05000369/LER-1986-008-01, :on 860415,high Makeup Rate to Vol Control Tank Indicated Unidentified RCS Leakage at Rate of 9 Gpm.Caused by Failure of Two 1/2-inch Tubing Compression Fittings on Pzr Level Impulse Lines.Fittings Replaced (← links)
- 05000369/LER-1988-024-01, :on 880912,unit Entered Tech Spec 3.0.3 When Train a of ECCS & Train B of Component Cooling HX Declared Inoperable.Caused by HX Failing Performance Test Due to Seasonal Environ Factors.Hx Water Flushed (← links)
- 05000369/LER-1988-022-01, :on 880922,during Fire Protection Audit, Discovered That Hourly Fire Watch Not Performed on 870528- 0603 for Inoperable Halon Fire Suppression Sys.Caused by Personnel Error.New Damper Plate Installed (← links)
- 05000369/LER-1986-006-01, :on 860311,failure to Fully Test Nuclear Svc Water Sys Until 860130 Noted.Caused by Mgt Deficiency. Periodic Flow Balance Test Procedures Written (← links)
- 05000369/LER-1988-008-02, :on 880502,turbine Driven Auxiliary Feedwater Pump CA Automatically Started & Declared Inoperable.Caused by Personnel Improperly Executing Test Step by Inadvertently Causing Lead to Make Contact W/Pump Circuitry (← links)
- 05000369/LER-1988-021-02, :on 880817,turbine Driven Auxiliary Feedwater Pump Automatically Started.Caused by Blown Fuse.Pump Discharge Regulating Valves That Redirect Pump Discharge Flow Closed,Pump Secured & Fuse Replaced (← links)
- 05000369/LER-1988-007-02, :on 880416,turbine Generator & Reactor Manually Tripped Due to Steam Generator 1C Feedwater Regulating Valve Closing.Caused by Failure of Control Card for Valve.Card Replaced & Will Be Analyzed by Westinghouse (← links)
- 05000369/LER-1988-020-02, :on 880912,actuator Disconnected from Valve Stem at Actuator to Valve Stem Coupling.Caused by Mgt Deficiency Due to Poor Planning/Scheduling by Operations. Operations Personnel Manually Opened Valve (← links)
- 05000369/LER-1986-004-01, :on 860129,cumulative Offsite Dose from Liquid & Gaseous Effluents Periodic Test Not Performed.Caused by Personnel Error.Program Implemented to Ensure That Staff Members Receive Weekly Periodic Test Schedule (← links)
- 05000369/LER-1988-019-02, :on 880719,discovered That Some Hydrogen Skimmer Vx Sys Damper Compartment Flows Did Not Meet Flow Requirements.Caused by Defective Procedure Due to Testing Not Requiring Flow Rates to Be Drawn (← links)
- 05000369/LER-1988-018-02, :on 880715,performance Determined During Testing Revealed Inability to Demonstrate Each Diesel Generator Operable.Caused by Inadequate Tech Specs. Procedures Revised (← links)
- 05000369/LER-1988-006-02, :on 880328,nuclear Svc Water Sys Isolation Valve Not Tested Following Maint Per Tech Spec 4.0.5.Caused by Personnel Error.Signs Affixed to ESF Valves to Inform Personnel of Required Testing Following Maint (← links)
- 05000369/LER-1986-003, :on 851103,unit Entered Mode 2 W/Motor Operators for Two Valves for Refueling Water Storage Tank & Vol Control Tank Inoperable.Caused by Personnel Error.Valves Repaired (← links)
- 05000369/LER-1988-017-02, :on 880610,several Limit Switches Identified W/ Deficiencies Such That Switches Did Not Meet Equipment Qualification Requirements.Caused by Defective Procedures. All Switches Repaired (← links)
- 05000369/LER-1998-006-02, :on 980812,noncompliance with Ice Condenser TS SR 4.6.5.1b.3 Noted.Caused by Lack of Clear Documentation Re Interpretation of TS SR 4.6.5.1b.3.Submitted TS Amend to Clearly Establish SR & Will Review Ice Condenser TSs (← links)
- 05000369/LER-1988-005-02, :on 880323,during Monthly Functional Test,Train a Safety Injection & Main Steam Sys Isolation Resulted in Reactor Trip.Cause Undetermined.New Procedures Implemented (← links)
- 05000369/LER-1988-016-01, :on 880622,containment Isolation Valve Inoperable Due to Incorrect Finger Plate Installation.Caused by Defective Procedure & Personnel Error.Maint Will Revise Appropriate Procedures to Address Problem (← links)
- 05000369/LER-1988-001-01, :on 880107,generator Started to Experience Abnormal Voltage & Reactive Load Transient,Causing Turbine & Generator Trip.Caused by Malfunctioning Firing Circuit. Circuit Repaired (← links)
- 05000369/LER-1988-014-02, :on 880624,ESF Actuation & Blackout Occurred Due to Personnel Taking Wrong Action.Caused by Slow Response of Diesel Generator 2A Lube Oil Pressure Switches.Switches Recalibr & Procedure Will Be Revised (← links)
- 05000369/LER-1988-013-02, :on 880620,rod Control Urgent Failure Alarm Received in Control Room Causing Control Rods to Drop Into Core.Caused by Failure of Primary Power Supply for Rod Control Sys.Recovery Procedure Implemented (← links)
- 05000369/LER-1988-004-02, :on 880309,Tech Spec 3.0.3 Entered When Evcb Vital Battery Charger de-energized.Caused by Problem of Unknown Origin W/Power Supply Breakers for Vital Battery Charger.Investigation Completed (← links)
- 05000369/LER-1988-012-02, :on 880203 & 05,valve Insps Revealed Motor Fallen Off Actuator on Valve 2ND-2A,RHR Pump 2A Suction Valve.Caused by Improperly Installed Motor Mounting Screws. Washers Added Under Cap Screws (← links)
- 05000369/LER-1988-003-03, :on 880309,discovered That Component Cooling HX 1B Control Inoperable Due to Nuclear Svc Water Sys Valve Being in Nonconservative Position & W/Travel Stops Loose.Hex Nuts for Travel Stops Set in Correct Position (← links)
- 05000369/LER-1987-022, :on 870921,breached Fire Blanket Discovered. Breach Occurred on 870912 When Personnel Cut Blanket to Perform Preventive Maint.Caused by Personnel Failure. Placards Attached Noting Blankets Are Barriers (← links)
- 05000369/LER-1988-010-02, :on 880601,diesel Generator 2A Did Not Start as Required When Normal Power Purposefully Failed to Train 2A During ESF Test.Contacts 4 & 4A Displayed Intermittent Failure to Stay Completely Closed (← links)
- 05000369/LER-1988-007, :on 880416,steam Generator 1C Feedwater Regulating Valve,Closed Due to Unknown Fault on Associated Card in Control Cabinet.Instrumentation & Electrical Replaced Faulty Controller Card (← links)
- 05000369/LER-1988-011-03, :on 880601,diesel Generator 2A Tripped on Engine Overspeed Prior to Termination of Blackout Test & Tech Spec Action Statement Entered.Cause Undetermined. Actuator Replaced & Shorter Bolts Attached (← links)
- 05000369/LER-1988-002, :on 880111,hanger Clamp Installed on Contaiment Isolation Valve in Unacceptable Location.Caused by Personnel Error in Changing Location W/O Approval or Documentation. Procedure Revised to Require Use of Drawings (← links)
- 05000369/LER-1987-020, :on 870905,RHR Pump 1B Declared Inoperable Due to Isolated Pump Recirculation Valve Controlling Flow Instruments.Work Requests for Flow Instruments Revised W/ Precautions & Event Will Be Covered During Training (← links)
- 05000369/LER-1987-020-01, Forwards Revised LER 87-020-01 Re 8-day Inoperability of RHR Pump 1B Due to Addl Analysis of Event & to Correct Wording in Abstract,Provide Expanded Safety Analysis & Discuss Addl Corrective Action (← links)
- 05000369/LER-1987-036-01, :on 871228 & 29,reactor Trips Occurred.Caused by Error in Schematic Diagram & Personnel Error.Diagrams Marked as Incorrect & Changes to Correct Unit 1 & 2 Diagrams Implemented (← links)
- 05000369/LER-1987-034-02, On 871109,Fire Doors 819A & 621A Blocked Open & Hourly Fire Watch Not Performed.Caused by Personnel Error. Fire Doors Closed & Mechanical Maint (Mnt) Will Establish Logbook for Tech Spec Items Under Mnt Control (← links)
- 05000369/LER-1985-039, :on 851210,spent Fuel Ventilation Performance Test Not Performed by Required Date.Caused by Personnel Error.Personnel Responsibility Will Be Assigned for Each Performance Test (← links)
- 05000369/LER-1992-008-03, :on 920726,reactor Trip/Turbine Trip Experience as Result of Defective Procedure Due to Technical Deficiency.Changes to Valve 1RC-43 Will Be Evaluated.W/ Undated Ltr (← links)
- 05000369/LER-1997-001-01, :on 970318,failure to Comply W/Ts 3.6.3 Following Valve 1CF-26AB Inoperability,Occurred.Caused by Misinterpretation of Reference Documents Re Applicability. Correct Application of TS Clarified (← links)
- 05000369/LER-1985-034-01, :on 851102,reactor/turbine Trip on Steam Generator 1A lo-lo Level Occurred.Caused by Loss of Instrument Air Due to Rupture of Welded Seam on Flexible Pipe on Discharge Air Compressor B (← links)
- 05000369/LER-1997-007, :on 970514,Unit 1 RT Occurred During Power Range Nuclear Instrumentation Testing.Caused by Personnel Utilizing Inappropriate Procedure for Existing Plant Conditions.Reviewed Subject & Associated Procedures (← links)
- 05000369/LER-1997-006, :on 970512,Unit 1 Esfa Occurred Due to Tripping of MFW Pumps.Enhanced Procedural Guidance Re Functional Verification of Equipment After Maint (← links)
- 05000369/LER-1985-038-01, :on 851222,reactor Tripped Due to Turbine Trip from 93% Power.Caused by Ground Fault within Motor Operated Disconnect (MOD) on Main Power Busline 1B.Unit Stabilized & MOD Repaired (← links)
- 05000369/LER-1997-004, :on 970320,main Steam Safety Valve TS Inaccuracies Were Discovered.Caused by Incorrect vendor-supplied Algorithm.Engineering Guidelines for Plant Operation Are in Place & TS Has Been Revised (← links)
- 05000369/LER-1986-005, :on 860207,during Insp Exit Interview, Determined That Containment Sump Isolation Valves 1NI-184B & 1NI-185A Not Visually Inspected at Least Once to Verify Remote Position Indication (← links)
- 05000369/LER-1985-030-01, :on 851009,valve 1RN-33 Found in Locked Closed Position Instead of Locked Open Due to Reversed Local Valve Position Indicator.Cause Unknown.Valve Opened & Properly Labeled (← links)
- 05000369/LER-1985-036-01, :on 851119,reactor Tripped Due to Feedwater Pump Turbine Trip on High Discharge Pressure.Caused by Rod Control Sys Not Lowering Power Enough During Turbine Runback.Failed Fuse Will Be Replaced (← links)
- 05000369/LER-1983-001-03, /03L-0:on 830105,during Review of 791220 Safety Injection (SI) Pumps & Flow Adjustment Functional Test II, Discrepancy Discovered Between Test Data & Omitted Acceptance Criteria.Caused by Procedure Error (← links)
- 05000369/LER-1985-029-01, :on 851001,Westinghouse Notified Util That Reanalysis of Peak Containment Pressure Calculation Resulted in Greater Value than Internal Pressure of 15 Psig.Emergency Procedure for Nd Spray Initiation Revised (← links)
- 05000369/LER-1985-028-01, :on 850919,environmentally Sealed Valcor Model 526 Inside Containment Valve Failed.Caused by Ruptured Seal as Result of Improper Installation.Four Valves Resealed & Returned to Svc.New Design Being Studied (← links)
- 05000369/LER-1985-032-01, :on 851018,QA Surveillance Revealed That Chemical & Vol Control Sys Valves 1NV-223 & 2NV-223 Not Partially Stroked.Caused by Lack of Relevant Procedures. Partial Stroke Requirement Will Be Deleted (← links)
- 05000369/LER-1997-003-02, :on 970326,both Trains of Control Room Ventilation Sys Inoperable Due to Isolated Air Intake Valves.Radiation Monitor Will Be Evaluated to Determine If Changes Are Needed in Design or Maint (← links)
- 05000369/LER-1997-001-03, :on 970318,failure to Comply W/Ts 3.6.3 Requirements Following Valve 1CF-26AB Inoperability Was Identified,Due to Misinterpretation of Reference Documents. Application of TS to Valve Was Clarified (← links)
- 05000369/LER-1985-035-01, :on 851030,B&W Fuel Assemblies Determined Incorrectly Stored Side by Side in Spent Fuel Pool.Caused by Inadequate Personnel Review of Tech Spec.Assemblies Placed in Checkerboard Pattern (← links)
- 05000369/LER-1986-002-01, :on 860105,reactor Trip Occurred as Result of Steam Generator lo-lo Level Signal.Caused by Loss of Feedwater to Steam Generator After Main Feedwater Control Valve 1CF-17 Failed Closed.Card Replaced (← links)
- 05000369/LER-1985-033-01, :on 851030,momentary Blackout on Train B Occurred.Caused by Nuclear Control Operator Inadvertently Opening Diesel Generator Breaker.Procedures for Blackout Implemented.Collars Installed on Generator (← links)
- 05000369/LER-1997-002-03, :on 970313,inoperability of FW Isolation Valves Discovered Due to Hydraulic Oil Degradation.Replaced Unit FWIV Solenoid Coils (← links)
- 05000369/LER-1986-001, :on 860105,during Mode 1,chemical & Vol Control Sys Pump 1B Inoperable More than 72 H.Caused by Delay in Pump Repair.Repairs Completed.Memo to Maint Personnel Re Matl Handling Will Be Written (← links)
- 05000369/LER-1985-039-01, :on 860101,discovered That Spent Fuel Pool Ventilation Performance Test Not Performed by Required Date of 851210.Caused by Personnel Error.Test Performed for Exhaust Fan 1A (← links)
- 05000369/LER-1985-037-01, :on 851210,Train a ESF Actuation Occurred Due to Actuation of Slave Relay in Reactor Protection Sys.Caused by Personnel Error.Safeguards Safety Injection Signal & Sequencer 1A Reset & Pumps Secured (← links)
- 05000369/LER-1985-031-01, :on 851017,Train B Chiller for Control Area Ventilation/Chilled Water Sys Tripped on Low Yc Flow While Train B Sys Inoperable.Cause Could Not Be Determined. Pressure Switch Repaired & Tubes Cleaned (← links)
- 05000369/LER-1985-024-01, :on 850723,determined That Operability Test Not Performed on Station Standby Battery Charger.On 850813, Found That Standby Charger Placed in Svc Twice Supplying Vital Loads on Channels 2 & 4 (← links)
- 05000369/LER-1996-004, :on 961010,incorrectly Calibrated Rcl Loss of Flow Reactor Trip Bistables Identified.Caused by Procedural/ Technical Inaccuracy.All Affected Procedures Were Changed & Instruments Calibrated within TS Limits (← links)
- 05000369/LER-1984-022-01, :on 840720,discovered That Fire Protection & Drain Piping Serving Control Room Pressurization Filter Trains Did Not Incorporate Seismic Design Criteria.Mods to Be Implemented to Correct Deficiency (← links)
- 05000369/LER-1996-005-04, :on 961101,TS Required Shutdown of Both Units Occurred Due to Failed Surveillance Test of Vital Battery Evcc.All Vital Battery Banks Will Be Replaced with Conventional Batteries by End of 2EOC11 Outage (← links)
- 05000369/LER-1996-003, :on 960618,during Scheduled Operability Test of EDG 1A,EDG Declared Inoperable.Caused by Equipment Failure/ Malfuction of EDG 1A & Equipment Failure & Mfg Process Deficiency of EDG 1B.EDGs SD & Failed Components Replaced (← links)
- 05000369/LER-1996-003-01, Forwards LER 96-003-01 Re Concurrent Inoperability of Edgs. Rev Submitted to Provide Addl Info Re Troubleshooting of Components Removed from EDG 1A (← links)
- 05000369/LER-1996-004-05, :on 961010,incorrectly Calibrated Reactor Coolant Loop Loss of Flow Reactor Trip Bistables Identified. Caused by Procedure Technical Inaccuracy.All Affected Procedures Were Changed (← links)
- 05000369/LER-1985-026-01, :on 850911,vendor-employed Minor Exposed in Excess of Quarterly Dose Limit of 125 Mrem.Caused by Individual Misrepresenting Age to Work in Radiation Control Area.Birth Dates Will Be Verified (← links)
- 05000369/LER-1985-021, :on 850605,personnel Overexposure Occurred. Calculations Indicate Dose of 10.6 Rems to Skin & 0.03 Rem to Whole Body.Control & Disposal of Protective Clothing Revised to Prevent Recurrence of Incident (← links)
- 05000369/LER-1985-021-01, Forwards LER 85-021-01 Re Personnel Exposure,Initially Determined to Be Overexposure.Revised Calculation Indicates No Overexposure Occurred (← links)
- 05000369/LER-1985-023-01, :on 850703,violation of Electrical Channel Separation Requirements by Temporary Cable Routing Discovered.Caused by Administrative/Procedural Deficiency. Cable Removed from Blue Channel Cable Tray (← links)
- 05000369/LER-1985-007-03, :on 850205,two ESF Actuations Occurred During Work on Reactor Protection & Nuclear Instrumentation Sys Channels.Caused by Procedures Allowing Simultaneous Sys Work.Procedures Revised (← links)
- 05000369/LER-1985-018-01, :on 850525,valve 1RV-429 in Containment Ventilation Cooling Water Sys Outside Containment Found Open,Allowing Flow Path Between Auxiliary Bldg & Upper Containment Through Inside Containment Valve (← links)
- 05000369/LER-1985-025-01, :on 850909,train Chillers & Air Handling Unit for Control Ventilation Area Sys Tripped.Caused by Design Deficiency Allowing Both Chillers to Become Inoperable Due to Blown Fuse.Fuse Replaced.Wiring Reviewed (← links)
- 05000369/LER-1996-006, :on 961109,actuation of Both Unit 1 Motor Driven Feedwater Pumps Were Manually Initiated Due to Loss of Auxiliary Steam Supply to Main Feedwater Pump Turbine. Pump Has Been Repaired (← links)
- 05000369/LER-1985-022-01, :on 850623,unplanned ESF Actuation Occurred on Loss of Both Main Feed Pumps Signal.Caused by Voltage Transient When Trend Chart Recorder Reinserted.Recorder Will Be Replaced (← links)
- 05000369/LER-1996-007-02, :on 961107,mode Related Missed TS Surveillance on Containment Integrity Discovered Due to Technical Inaccuracy.Pm/Pt Database Corrected & TS Surveillance Quality Improvement Team Formed (← links)
- 05000369/LER-1996-006-03, :on 961109,manually Initiated Actuation of Unit 1 Driven AFW Pumps Occurred Due to Loss of as Supply to MFW Pump Turbine.Caused by Insufficient Lubrication.No Corrective Actions Right Now (← links)
- 05000369/LER-1985-020-01, :on 850607,diesel Generator 1B Experienced Two Invalid Automatic Starts.Caused by Power Distribution Sys Disturbances Due to Severe Weather.Start Sys Will Be Modified (← links)
- 05000369/LER-1985-014-01, :on 850507,core Alterations Started W/O Completion of Required Surveillance on Source Range Neutron Flux Monitors While in Mode 6.Caused by Administrative/ Procedural Deficiency.New Procedure Planned (← links)
- 05000369/LER-1985-008-01, :on 850206,discovered That Reactor Trip Switchgear Wiring Did Not Satisfy Separation Criteria for safety-related Circuits.Caused by Administrative/Procedural Deficiency.Procedures Revised (← links)
- 05000369/LER-1992-011, :on 921210,pressure Switches 2CAPS-5380 & 5381 Found Outside Specified Setpoint Limit Due to Inoperable ESFAS Instrumentation.Subj Switches Recalibr to Correct Values (← links)
- 05000369/LER-1992-012, :on 921116,determined That RWST Level Transmitter Technically Inoperable Due to Possible Inappropriate Action.Iae Personnel Replaced Tube Plug 1FWLT5000 (← links)
- 05000369/LER-1985-012-01, :from 850214-0425,fire Doors Normally Locked Closed Were Unlocked & Not Verified Closed Daily Nor Was Fire Watch Posted.Caused by Administrative/Procedural Deficiency.Required Surveillance Implemented (← links)
- 05000369/LER-1985-015-02, :on 850508,auxiliary & Reactor Bldg Side Door Lower Airlock Seals Deflated,Causing Loss of Containment Integrity.Caused by Maladjustment of Airlock Door Pin Limit Switches Combined W/Design Deficiency (← links)
- 05000369/LER-1992-010-02, :on 920916,discovered That Containment Structure Mechanical Penetration M-309 Developed Steam Leak on 840720.Caused by Design Deficiency & Equipment Failure. Station Problem Rept Initiated (← links)
- 05000369/LER-1985-016-01, :on 850508,discovered That Temp Compensation Chart Not Incorporated in Hydrogen Analyzer Operation Emergency Procedure.Caused by Procedural Deficiency.Temp Compensation Charts Incorporated in Procedure (← links)
- 05000369/LER-1992-012-02, :on 921116,RWST Transmitter Determined to Be Past Inoperable.Caused by Possible Inappropriate Action & Defective Procedure.Suppl Rept Will Be Submitted When Investigation Completed (← links)
- 05000369/LER-1985-017-01, :on 850515,diesel Generator 1A Experienced Invalid Automatic Start Due to Unit Blackout Signal.Caused by Electrical Disturbance to Power Transmission Sys During Severe Storm & Listed Design Deficiency (← links)
- 05000369/LER-1985-013-01, :on 850502,during Refueling,Gearcase Lubricating Grease Found in Electrical Compartments of Limitorque Motor Operated Valve Actuators 1VX-1A & 1VX-2B. Caused by Error During Previous Maint Work (← links)
- 05000369/LER-1992-006, :on 920430,discovered Air in Nuclear Svc Water Assured Makeup Piping Associated W/Afw Pump Suction Header Rn Supply Isolations.Caused by Design Deficiency.Continuous Venting Initiated at High Point Locations (← links)
- 05000369/LER-1992-011-02, :on 921210,four AFW Pressure Switches Found Outside Specified Setpoint Limit.Caused by Setpoint Drift Due to Unknown Factors.Switches Replaced & Mods Implemented to Increase Setpoint for All 20 Switches by Addl 2 Psig (← links)
- 05000369/LER-1985-011-01, :on 850409,samples Taken from Cold Leg Accumulator a Prior to Unit Shutdown Revealed Low Boron Concentration.Caused by Component Failure.Boron Concentration Returned to within Specs (← links)
- 05000369/LER-1985-010-01, :on 850320,keyswitch for Door on Reactor Side of Containment Personnel Airlock in Bypass Position.Caused by Procedural Deficiency.Procedures Will Be Changed to Ensure Switches Returned to Active Position (← links)
- 05000369/LER-1996-003-03, :on 960618,concurrent Inoperability of Both Unit 1 Emergency Diesel Generators.Caused by Possible Equipment Failure/Malfunction.Shutdown of EDGs & Replaced Failed Components (← links)
- 05000369/LER-1992-009, :on 920625,reactor Trip Occurred,Due to Removal of Solid State Protection Sys Fuse.Caused by Inappropriate Action & Mgt Deficiency.Frequency of Preventive Maint Increased (← links)
- 05000369/LER-1984-018, :on 840604,Train B Chiller of Control Area Ventilation Sys Tripped Due to Low Oil Level & Declared Inoperable.Caused by Unusual Svc Conditions.Five Gallons of Oil Added & Chiller Restarted (← links)
- 05000369/LER-1985-004-01, :on 850128,reactor Tripped on lo-lo Steam Generator Level When Main Feedwater Pump Tripped on Low Suction Pressure Signal.Caused by Failure of Pneumatic Pressure Transmitter.Components Replaced (← links)
- 05000369/LER-1996-001, :on 960203,manual Reactor Tripped When 1A RCP Upper Thrust Bearing Reached Administrative Limit of 195 Degrees.Caused by Unknown Equipment Failure.Associated Sys & Components Evaluated/Tested.Unit Returned to Svc on 960205 (← links)
- 05000369/LER-1996-001-01, Forwards LER 96-001-01 Re Manual Reactor Trip.Rev Due to Determination That Event Not NPRDS Reportable & Not Considered Significant Re Public Health & Safety (← links)
- 05000369/LER-1985-003-01, :on 850120,erroneous Signals to Reactor Protection Sys Created Likelihood of Spurious Trip.Caused by Freezing Temps in Area.On 850121,jumper Installed on Bistable Circuit to Thaw Instruments (← links)
- 05000369/LER-1985-002-01, :on 850113,required Quarterly Surveillance Not Performed within Allowable Interval.Caused by Personnel Error.Fuel Oil Transfer Pump Performance Test for Each Diesel Will Be Added to Computer Listing (← links)
- 05000369/LER-1990-022, :on 900716,discovered That Both Trains of Rhrs Inoperable During Testing of Quarterly Valve Stroke Timing. Caused by Improper Scheduling.Changes Made to Remove Valves & Review Program Implemented (← links)
- 05000369/LER-1985-001, :on 841229,daily Health Physics Surveillance of Waste Gas Decay Tank Not Completed within 24 H Interval. Caused by Personnel Error.Use of Duties Checklist Required & Documentation of Duties Will Be Reviewed (← links)
- 05000369/LER-1991-070, :on 910520,discoverd That Train B of RHR Sys Had Been Inoperable for More than 72 H W/O Knowledge of Operations CR Personnel Due to Inappropriate Actions.Station Directive 3.1.5 to Be Revised (← links)
- 05000369/LER-1992-007, :on 920506,ESF Actuation Occurred While Control Room Personnel Performing Wet Layup Evolution on SG 1D. Caused by Defective Procedure & Inappropriate Personnel Action.Procedure Revised (← links)
- 05000369/LER-1992-003, :on 920219,discovered That Valve 1WL-130B (Upper Head Injection Check Valve Test Line Isolation) Inoperable.On 920212,work Request Lacked Proper Rev Number. Caused by Mgt Deficiency.Valve Retested (← links)
- 05000369/LER-1984-029, :on 841029,concentration of Nitrogen in Upper Head Injection Accumulator Exceeded Tech Spec Limits.Caused by Repetitive Continuous Makeup to Accumulator from Upper Head Injection Surge Tank (← links)
- 05000369/LER-1996-002-01, :on 960204,inadvertent Manual Initiation of Unit 1 FW Isolation Occurred Due to Inappropriate Action. OPS Mgt Evaluated Depressing & Holding Train a & B CF Isolation (← links)
- 05000369/LER-1984-028, :on 840712,design Deficiency Reported in Relief Capacity of Component Cooling Water Sys Surge Tank.Cause Not Stated.Increased Relief Capacity for Surge Tanks Will Be Added (← links)
- 05000369/LER-1985-009-01, :on 850219,estmated 1 Cubic Ft of Contaminated Spent Resin Released from Vent.Resin Discovered on 850220 on Roof of Auxiliary Bldg & Other Bldgs.Caused by Personnel Error (← links)
- 05000369/LER-1985-006-01, :on 850205,reactor Tripped on High Negative Flux Rate Signal.Cause unknown.Post-trip Review Performed & Electronic Recorders Used to Monitor Possible Spikes (← links)
- 05000369/LER-1985-005-01, :on 850201,determined Plant Outside Design Analyses Assumptions,Based on Westinghouse Response Re Negative Flux Rate Trip Setpoint.Bistable Setpoint Reduced to 2.5% Rated Thermal Power (← links)
- 05000369/LER-1984-025-02, :on 840712,Westinghouse Filed Part 21 Rept Re Potential Overpressurization of Component Cooling Water Sys. Mods Will Be Designed & Implemented to Increase Relief Capacity of Surge Tanks (← links)
- 05000369/LER-1984-025-01, :on 840627,3/4-inch Vent Valve in Containment Spray Sys Found Open During Valve Stroke Timing Test.Caused by Personnel Error.Importance of Removal & Restoration Procedures Emphasized.Spill Cleaned Up (← links)
- 05000369/LER-1992-006-02, :on 920502,Units 1 & 2 Turbine Driven CA Pumps Isolated from Potential Source of Air from Rn Discharge Header & Declared Inoperable.Caused by Design Deficiency. Procedure Changes Made (← links)
- 05000369/LER-1992-004-03, :on 920414,Train 1B ESF Actuation Occurred When Performing Train 1B motor-driven Auxiliary Feedwater Pump Removal from Svc.Caused by Mgt Deficiencies.Alert or Flag Will Be Added to Computerized Program (← links)
- 05000369/LER-1984-023, :on 840723,unit Tripped from 100% Power on lo-lo Steam Generator Level Indication.Caused by Feedwater Sys Solenoid Valve Failure.Chart Recorder Added to Feedwater Valves by Hydraulic Pump Motor (← links)
- 05000369/LER-1992-001-02, :on 920116,Unit 1 Shutdown Due to Leakage Increased to 235 Gallons Per Day.Caused by Failure to Remove Steam Generator Tube from Svc.Three Tubes Removed from Steam Generator 2c for Lab Analysis (← links)
- 05000369/LER-1992-005, :from 920226-28,diesel Generator 1A Inoperable Due to Fuel Oil Level in Fuel Oil Storage Tank Below 39,500 Gallons.Caused by Inadequate self-checking by Technicians.Fuel Oil Returned to Tank (← links)
- 05000369/LER-1984-021, :on 840702,reactor Trip Breaker of Train a (RTB-A) Inadvertently Opened During Testing.Caused by Misreading of Instrumental & Electrical Procedure & Deficiency in Instructions.Procedure Rewritten (← links)
- 05000369/LER-1995-005-03, :on 950927,manual Reactor Trip Initiated After Valve 1SM-0007AB,MSIV Steam Line a Moved to Fail Safe (Closed) Position.Cause Unknown.Associated Fuses,Sv Coils, Some Wiring Terminations & Relays Replaced (← links)
- 05000369/LER-1995-006-01, :on 951001,reactor Trip Occurred Due to Low Reactor Coolant (Nc) Sys Flow.Caused by Surge Capacitor Failure in Nc Pump Motor Connection Enclosure.Failed Capacitor Replaced (← links)
- 05000369/LER-1984-017, :on 840523,diesel Generators 1A & 1B Experienced Invalid Automatic Start.Caused by Blackout Signal Generated by Momentary Power Distribution Sys Due to Electrical Storm in Svc Area (← links)
- 05000369/LER-1995-004-02, :on 950821,failed to Comply W/Ts Action Statement for Rc Leakage Detection Sys Due to Programmatic Deficiencies & Equipment Failure.Changed Filter Paper on Particulate Monitors (← links)
- 05000369/LER-1995-003, :on 950627,turbochargers Associated W/Edgs Failed Due to Design Oversight.Remaining Compressor Impellers Evaluated &/Or Replaced (← links)
- 05000369/LER-1984-015, :on 840426,during Performance of Rod Control Cluster Assembly Drop Timing,Rod B-12 Failed to Indicate Correct Position.Caused by Defective Detector/Encoder Card. Card Replaced & Drop Timing Completed (← links)
- 05000369/LER-1991-018, :on 911218,trains of Annulus Ventilation Sys Declared Inoperable Due to Mgt Deficiency & Deficient Communication.Appropriate Personnel Verified That Annulus Ventilation Door Closed (← links)
- 05000369/LER-1991-014-02, :on 910930,containment Spray Sys Pump 1A Air Handling Unit Outlet Control Found Mispositioned in Closed Position.From 910904-1004,Train a of Containment Spray Sys Inoperable.Cause Unknown.Valve Opened (← links)
- 05000369/LER-1984-014, :on 840420,essential 4,160-volt Switchgear Equipment Transfer Aisle 1 Inadvertently Deenergized During ESF Test.Caused by Personnel Error.Offsite Power Returned to Equipment Transfer Aisle 1 (← links)
- 05000369/LER-1991-017-01, :on 911016,discovered That Smoke Purge Exhaust Fan Would Not Receive Trip Signal on Diesel Generator Sequencer Actuation.Caused by Design Deficiency. Safety Tag Placed on Control Switch (← links)
- 05000369/LER-1984-019, :on 840606,insp Revealed Several Active Valves W/Limitorque Smb Actuators Installed W/O T-drains.Cause Unknown.Limitorque Installation & Instruction Manual Will Be Revised to Include T-drain Plug Installation (← links)
- 05000369/LER-1984-020, :on 840606,reactor Tripped When Spurious Undervoltage Relay Actuation Deenergized One Reactor Coolant Pump.Caused by Component Malfunction.Further Testing Will Be Conducted to Determine Failure Mechanism (← links)
- 05000369/LER-1992-002-02, :on 920117,error Detected in Results from Computer Program Used to Perform Power Distribution Surveillance Calculations.Caused by Design Deficiency. Program Corrected (← links)
- 05000369/LER-1992-001-03, :on 920116,orderly Shutdown Commenced as Result of primary-to-secondary Leakage.Caused by Steam Generator Tube 47-46 Leaking 30 Drops Per Minute at Secondary Side.Data Review Conducted (← links)
- 05000369/LER-1984-004-01, :on 831117,source Leak Test Not Performed Prior to Installation of in-core Detector.Caused by Personnel Error & Procedure Not Requiring Signature Signoff.Procedure Revised to Require Signoff (← links)
- 05000369/LER-1984-003-01, :on 840220,during Normal Rotation of Equipment, Centrifugal Charging Pump 1A Would Not Start.Pump Breaker Not in Fully Connect Position Due to Personnel Error in Restoring Breaker After Routine Oil Sample (← links)
- 05000369/LER-1991-018-01, :on 911218,both Trains of Annulus Ventilation Sys Inoperable When Bypass Door Latched Open to Allow Personnel Communication.Caused by Mgt Deficiency Due to Lack of Adequate Policy.Chains/Padlocks Installed (← links)
- 05000369/LER-1984-002-01, :on 840130,reactor Protection Sys Initiated Trip Following Voltage Spike in Loop C.Caused by Failure of Loop C Lead/Lag Card of Process Control Sys.Faulty Card Replaced (← links)
- 05000369/LER-1995-003-02, :on 950627,turbochargers Associated W/Edgs Failed Due to NRC Cause Code of Design Oversight.Evaluated & Replaced Remaining Compressor Impellers (← links)
- 05000369/LER-1984-001-01, :on 840109,unauthorized Removal of Safety Injection,Main Feedwater & Component Cooling Sys Support/ Restraints Discovered.Support/Restraints Reinstalled, Repaired or Deleted as Appropriate (← links)
- 05000369/LER-1983-119-03, /03L-0:on 831214,invalid Fire Alarm for Fire Detection Zone Efa 76 Received & Alarm Would Not Reset. Caused by Corrosion & Dirt Inside Detector Base.Fire Watch Established.Detector & Base Replaced (← links)
- 05000369/LER-1983-116-03, /03L:on 831202,invalid Fire Alarm for Fire Detection Zone Efa 40 (Control Room) Received.Alarm Would Not Reset.Caused by Dust & Dirt Accumulation.Detector Cleaned & Adjusted (← links)
- 05000369/LER-1991-016-01, :on 911024,discovered That 11 Fuel Assemblies Stored in Spent Fuel Pool from 900323 to 911023.Caused by Defective Procedure.Fuel Assemblies Immediately Moved to Positions to Establish Required Vacant Row (← links)
- 05000369/LER-1991-015-01, :on 911013,inadvertent ESF Actuation Occurred When Blackout Signal Sent to Diesel Load Sequencer 1A. Caused by Inappropriate Operator Action.Power Restored to Bus 1ETA & Personnel Reviewed Incident (← links)
- 05000369/LER-1983-080-03, /03L-0:on 830909,during Performance of Periodic Ice Condenser Intermediate Desk Door & Monitoring Sys Insp, Two Intermediate Deck Doors Discovered Frozen Shut.Caused by Unusual Svc Conditions (← links)
- 05000369/LER-1983-078-03, /03L-0:on 830906,while in Mode 3,invalid Fire Alarm on Fire Detection Zone Efa 152 Received.Fire Alarm Would Not Reset & Efa 152 Declared Inoperable.Cause Unknown.Alarm Reset W/Unit at Power (← links)
- 05000369/LER-1983-079-03, /03L-0:on 830908 & 26,steam Line 1C Radiation Monitor 1EMF-26 Declared Inoperable Due to Sporadic Operation of Light & Checksource Function.Caused by Gm Tube Load Resistor Below Limit.Resistor Replaced (← links)
- 05000369/LER-1991-013-01, :on 910920,both Trains of Annulus Ventilation Sys Declared Inoperable.Caused by Mgt Deficiency & Inappropriate Actions.Guidelines for Control of Ventilation Sys Will Be Developed (← links)
- 05000369/LER-1991-009-01, :During Wk of 910708,hardware Limits for Certain Process Control Equipment in Reactor Protection Sys Exceeded.Caused by Design Deficiency Due to Deficient Documentation.Resistors Changed (← links)
- 05000369/LER-1991-010-01, :on 910719,discovered That Control Rod Deviation Monitor Inoperable Since 831207.On 910713,control Rod Groups 1 & 2 Misaligned by Greater than 12 Steps.Caused by Defective Procedure & Mgt Deficiency (← links)
- 05000369/LER-1991-011-02, :on 910724,fuel Discovered Moved in Fuel Pool While Fuel Handling Exhaust Sys Inoperable.Caused by Inappropriate Actions.Personnel Involved Reviewed Event (← links)
- 05000369/LER-1991-005, :on 910515,both Trains of Annulus Ventilation Sys Were Inoperable Due to Inappropriate Action.Caused by Mgt Deficiencies & Deficient Communication.No Personnel Injuries or Radiation Overexposures Noted (← links)
- 05000369/LER-1995-001-01, :on 950129,Unit 1 Manual Reactor Trip Was Initiated Due to Equipment Failure.Replaced Type of Fuse in Applications Deemed Critical to Plant Operation (← links)
- 05000369/LER-1984-013, :on 840405,redundant Circuit Protection Devices Determined Incapable of Keeping Two Permanently Installed Dc Welding Circuits within Electrical Penetration Ratings. Caused by Design Oversight (← links)
- 05000369/LER-1984-012, :on 840330,during Periodic Test,Diesel Generator 1A Experienced Automatic Start Signal.Caused by 4160-volt Emergency Bus Eta Blackout When Feeder Breaker Mistakenly Opened.Breaker Closed & Loaded (← links)
- 05000369/LER-1984-011-01, :on 840329,diesel Generator 1A Experienced Invalid Automatic Start.Caused by Shorted Diode in Temporary Trip Monitoring Device.Device Will Be Modified (← links)
- 05000369/LER-1984-010, :on 840328,diesel Generator 1B Experienced Invalid Automatic Start.Caused by Severe Weather.Blackout Signal Cleared & Diesel Generator Not Loaded.Generator Shut Down After Operating 6 Minutes (← links)
- 05000369/LER-1984-009-01, :on 840314,possible Lack of Containment Integrity Involving Reactor Vessel Level Indication Sys Determined.Caused by Administrative Deficiency.Containment Integrity Verified W/Puff & Pressure Test (← links)
- 05000369/LER-1994-010-01, Forwards LER 94-010-01 Re Failure to Perform TS Required Surveillance Because Testing Not Specified.Event Considered to Be of No Significance W/Respect to Health & Safety of Public (← links)
- 05000369/LER-1984-008-01, :on 840112,during FSAR Review,Nrc Noted Several Model Changes to Westinghouse Marvel Code Used to Calculate Mass & Energy Release for Main Steam Line Breaks. Cause Not Stated.Analysis Performed (← links)
- 05000369/LER-1984-005-01, :on 840302,blackout Signal Generated on Diesel Generator 1B.Caused by Short Circuit Resulting from Drill Bit Striking Wires Inside Load Sequencer Panel Cabinet. Wires Separated & Fuses Replaced (← links)
- 05000369/LER-1984-007-01, :on 840306,determination Made That 18-month Functional Testing of Reactor Coolant Pump Time Delay Overcurrent Protective Devices on 830221 & 840113 Inadequate.Caused by Deficient Procedure (← links)
- 05000369/LER-1984-006-01, :on 840305,diesel Generators 1B,2A & 2B Experienced Invalid Automatic Start.Caused by Power Distribution Sys Disturbance.Diesel Generators Shutdown After Determined Not Required (← links)
- 05000369/LER-1983-114-03, /03L-0:on 831128,diesel Generator Load Sequencer 1B Declared Inoperable.Caused by Component Malfunction. Sequencer Test Satisfactorily Completed After Adjusting Timers (← links)
- 05000369/LER-1983-112-03, /03L-0:on 831121,fire Protection Zone Efa 150 Declared Inoperable When Trouble Alarm Would Not Reset.Cause of Trouble Alarm Actuation Not Determined.Fire Detectors in Zone Cleaned,Checked & Adjusted (← links)
- 05000369/LER-1983-111-03, /03L-0:on 831117,detector Voltage Removed from Source Range Detectors for Channels N-31 & N-32,rendering Channels Inoperable.Caused by Personnel Error & Unclear Procedure.Detector Voltage Restored (← links)
- 05000369/LER-1983-113-03, /03L-0:on 831124,trouble Alarm for Fire Detection Zone Efa 162 Received & Would Not Reset.Caused by Moisture Accumulation in Detector Base,Resulting in Corrosion.Water Source Undetermined.Detector Replaced (← links)
- 05000369/LER-1983-110-03, /03L-0:on 831112,source Range Indication for Channel N-32 Failed High,Resulting in High Flux Reactor Trip.Caused by Loose Grounding Wires.Wires Soldered & Two Range Detector Assembly Installed (← links)
- 05000369/LER-1991-012-01, :on 910823,vital Battery Surveillance Missed. Caused by Inappropriate Actions.Planning & Personnel Will Evaluate Changing Day of Wk Surveillance Performed to Ensure Appropriate Interaction (← links)
- 05000369/LER-1983-106-03, /03L-0:on 831025,invalid Fire Alarm for Fire Detection Zone 152 Received in Control Room Which Would Not Reset.Caused by Corroded Circuitry Board of One Ionization Type Detector.Detector Replaced (← links)
- 05000369/LER-1983-109-03, /03L-0:on 831112,average Lower Containment Air Temp Exceeded 125 F for Approx 2 H & 20 Minutes & Again for 2 H & 30 Minutes.Caused by Fouling of Ventilation Sys Air Handling Unit Cooling Coils (← links)
- 05000369/LER-1983-108-03, /03L-0:on 831103,bad Universal Logic Card Found Which Would Not Provide Feedwater Isolation After Reactor Trip.Caused by Component Failure.Card Replaced.Train a Tested & Declared Operable (← links)
- 05000369/LER-1990-010-01, :on 900427,discovered That Annulus Ventilation & Control Ventilation Sys Heaters Would Not Operate Under All Postulated Operating Conditions.Caused by Design Deficiency.Tech Spec Change Requested (← links)
- 05000369/LER-1991-009-02, :During Wk of 910708,discovered That Gain Setting to Average Reactor Coolant Temp Input Would Cause Process Control Equipment to Reach Hardware Limit.Caused by Design Defect.Resistors Changed (← links)
- 05000369/LER-1983-107-01, /01T-0:on 831111,while in Mode 1,door Seals on Reactor Bldg Side Door Inadvertently Deflated While Auxiliary Bldg Side Door Open.Caused by Procedural Deficiency.Procedural Step Added (← links)
- 05000369/LER-1983-105-03, /03L-0:on 831018,RCS Subcooling Margin Monitor Declared Inoperable When Margin Incorrect Due to Failure of Thermal Outputs Computer Program.Caused by Suspected Error in Program.Error Corrected (← links)
- 05000369/LER-1983-100-03, /03L-0:on 831008,during Monthly Functional Test, Pressure of Oxygen Regulator 1A Found Out of Required Tolerance.Apparently Caused by Leakage Past Internal Diaphragm.Regulator Replaced (← links)
- 05000369/LER-1983-104-03, /03L-0:on 831020,RCS Loop B Overtemp Delta T Declared Inoperable When Loop Indicator Exceeded Allowable Tolerance.Caused by Malfunction of Heat Sensitive Components on Printed Circuit Card in Process Control Sys (← links)
- 05000369/LER-1983-103-03, /03L-0:on 831012,RCS Loop B Overtemp Delta T Declared Inoperable When Loop Indicator Exceeded Allowable Tolerance.Caused by Malfunction of Heat Sensitive Components on Printed Circuit Card in Process Control Sys (← links)
- 05000369/LER-1983-099-03, /03L-0:on 831006,invalid Fire Alarm for Fire Detection Zone Efa 77 Received in Control Room.Caused by Unidentified Waterspill Around Ceiling Hatch Plug Accumulating Around Detector & Base (← links)
- 05000369/LER-1983-095-03, /03L-0:on 830930,steam Generator a Water Level High Channel III Declared Inoperable.Caused by Component (Signal Comparator Card) Failure.Card Replaced & Channel Returned to Svc (← links)
- 05000369/LER-1983-098-03, /03L-0:on 831006,three Locked Open Valves Found Open & Unlocked.Caused by Personnel Failure to Use Operating Procedures.Personnel Counseled.Addl Actions Specified in RO-370/83-53 (← links)
- 05000369/LER-1983-096-03, /03L-0:on 831001 & 04,steam Line Radiation Monitor 1C IEMF-26 Declared Inoperable Due to Sporadic Operation of Operate Light & Check Source Indication.Caused by Bad Solder Joint in Coaxial Cable (← links)
- 05000369/LER-1983-064-99, Ler 83-064/99T-0:on 831024,Westinghouse Notified Util of Potentially Defective Relays SA1.Relay Used in Class IE Switchgear for Diesel Generator Protection & May Cause False Trip Output to Diesel Generator.Caused by Mfg Defi (← links)
- 05000369/LER-1983-101-01, /01T-0:on 831024,Westinghouse Notified Util of Potentially Defective Relays SA1.Relay Used in Class IE Switchgear for Diesel Generator Protection & May Cause False Trip Output to Diesel Generator.Caused by Mfg Deficiency (← links)
- 05000369/LER-1983-065-01, /01T-0:on 831025,potential Deficiency of Capstan Springs in Pacific Scientific Mechanical Snubbers Identified.Caused by Vendor Aging Spring Prior to Forming, Resulting in Cracking During Plating.Snubbers Replaced (← links)
- 05000369/LER-1983-102-01, /01T-0:on 831025,potential Deficiency of Capstan Springs in Pacific Scientific Mechanical Snubbers Identified.Caused by Vendor Aging Springs Prior to Forming, Resulting in Cracking During Plating.Snubbers Replaced (← links)
- 05000369/LER-1983-097-03, /03L-0:on 831005,while in Mode 3,pressurizer Heater Group 1B Declared Inoperable When Vacuum Contactor Failed to Energize in Manual.Caused by Component Malfunction.Repair Will Be Made During Outage (← links)
- 05000369/LER-1983-094-03, /03L-0:on 830930,invalid Fire Alarm for Fire Detection Zone EFA-115 Received in Control Room Which Would Not Reset.Caused by Component Malfunction Due to Accumulation of Dust (← links)
- 05000369/LER-1983-093-03, /03L-0:on 830926,Fire Door 819A Found Attached to Door Frame by Top Hinge & Door Closer Mechanism Only.Caused by Damage to Threads of Screw Holes.Screw Holes Retopped & New Screws Installed (← links)
- 05000369/LER-1991-008-01, :on 910514,determined That Diesel Generators Could Be Rendered Inoperable Under Certain Postulated Conditions.Caused by Design Deficiency.Piping Erosion Measurements on Drain Lines Will Be Conducted (← links)
- 05000369/LER-1983-092-03, /03L-0:on 830926,QA Audit of Fire Door Insps Discovered Door 723F Identified During Weekly Insps as Unlocked But No Corrective Action Taken.Caused by Failure to Follow Procedures.Personnel Counseled (← links)
- 05000369/LER-1995-002-01, :on 950221,Train a of Control Room Ventilation Sys Judged Technically Past Inoperable Occurred.Caused by Inadequate Review of Cumulative Effects of Field Changes. Throttling Procedure Put in Place (← links)
- 05000369/LER-1983-081-03, /03L-0:on 830910 & 12,trouble Alarm for Fire Detection Zone Efa 150 Received & Would Not Reset.Caused by Spurious Alarm & Erratic Voltage Readings,Respectively. Three Detector Bases Replaced (← links)
- 05000369/LER-1983-087-03, /03L-0:on 830908,weekly Portion of Fire Door Insp Periodic Test Not Performed.Caused by Contractor Personnel Error.Security Personnel Counseled & Surveillances Will Be Added to Shift Turnover Procedures (← links)
- 05000369/LER-1994-007, :on 941024,DGs 1B & 2A Experienced Inadvertent Starts Due to Unanticipated Interaction of Components. Struthers Dunn 219DXBP Type Relays Used in DG Control Circuitry for Four DGs Replaced (← links)
- 05000369/LER-1983-090-03, /03L-0:on 830924,Loop D Overpower Delta T & Overtemp Delta T Declared Inoperable.Caused by Component Failure Due to Failed Lead/Lag Amplifier Card TY-441K.Card Replaced.Loop Calibr (← links)
- 05000369/LER-1983-088-03, /03L-0:on 830922,while in Mode 1,invalid Fire Alarm Received on Zone Efa 77 (Reciprocal Charging Pump Room).Alarm Would Not Reset.Efa 77 Declared Inoperable. Caused by Water Entering Two Bases & Detectors (← links)
- 05000369/LER-1983-089-03, /03L-0:on 830923,annunciator Efa 138 Declared Inoperable Following Invalid Fire Alarm for Fire Detection Zone.Caused by Accumulation of Dirt & Dust in Detector. Detector Cleaned & Reinstalled (← links)
- 05000369/LER-1983-047-01, /01T-0:on 830929,two Scheduled Auxiliary Bldg Electrical Penetration Room Fire Watch Patrols Not Performed.Caused by Personnel Error.Personnel Counseled (← links)
- 05000369/LER-1983-083-01, /01T-0:on 830929,two Scheduled Auxiliary Bldg Electrical Penetration Room Fire Watch Patrols Not Performed.Caused by Personnel Error.Personnel Counseled (← links)
- 05000369/LER-1983-082-03, /03L-0:on 830911,pressurizer Heater Group 1B Declared Inoperable When Operation Did Not Aid in RCS Pressure Control.Caused by Blown 500 Amp Line Fuse in Vacuum Contractor Cabinet.Fuse Replaced (← links)
- 05000369/LER-1984-001-03, :on 840109,valve Support Clamp Found Removed & Support Moved from Normal Position Under Valve 1KC-51A.On 831016 & 1021,tour Pipe Support Restraints Found Removed. Caused by Unauthorized Removal (← links)
- 05000369/LER-1983-075-03, /03L-0:on 830831,while Attempting to Open Valve 1NM-200B for Stroke Timing During Nuclear Sampling Valve Stroke Timing Quarterly Test,Valve Failed to Open.Caused by Burned Up Actuator.Actuator Will Be Replaced (← links)
- 05000369/LER-1983-076-03, /03L-0:on 830901,Fire Door 819A Found Propped Up Against Wall W/Screws Removed from Door Hinges.Caused by Door Deliberately Removed from Frame Due to Dragging Problem.Door Repaired (← links)
- 05000369/LER-1983-074-03, /03L-0:on 830830,while in Mode 1,invalid Fire Alarm on Fire Detection Zone EFA-80 Received in Control Room & Alarm Would Not reset.EFA-80 Declared Inoperable.Caused by Dust Accumulation in Detector (← links)
- 05000369/LER-1983-073-03, /03L-0:on 830829,surveillance Test Review Determined That Monthly Test on RCS Cold Leg Accumulator Pressure Not Performed by Required Date of 830506.Caused by Personnel Error (← links)
- 05000369/LER-1983-072-03, /03L-0:on 830914,while in Mode 1,review Determined That Inadequate Fire Barrier Provided Between Electrical Penetration Rooms Located in Auxiliary Bldg.Caused by Error During Identification of Fire Barrier Penetrations (← links)
- 05000369/LER-1983-011-01, While Core Unloaded During Fuel Assembly insp,21 of 94 Nonfuel Bearing Components Equipped W/Same Spring Design Discovered W/Broken Holddown Springs.Caused by Design Deficiency (← links)
- 05000369/LER-1983-071-03, /03L-0:on 830826,trouble Alarm for Fire Detection Zone Efa 72 Received in Control Room & Alarm Would Not Reset.Zone Declared Inoperable.Caused by Water & Dirt Accumulation,Damaging Detectors (← links)
- 05000369/LER-1983-070-03, /03L-0:on 830815,while in Mode 5,trouble Alarm for Fire Detection Zone Efa 131 Would Not Reset.Caused by Incorrect Installation of Resistors for rate-of-rise Detectors.Resistors Rewired Properly (← links)
- 05000369/LER-1983-069-03, /03L-0:on 830815,while in Mode 5,trouble Alarm for Fire Detection Zone Efa 72 Would Not Reset.Caused by Water & Dirt Accumulation on Underside of 733 floor/716 Ceiling.Detector & Base Contacts Cleaned (← links)
- 05000369/LER-1983-068-03, /03L-0:on 830815,while in Mode 5,alarms on Fire Detection Zones 136 & 141 Would Not Clear.Caused by Dust &/Or Welding Fumes Associated W/Removal of Valve 1NC-18. Alarms Reset (← links)
- 05000369/LER-1983-121-03, /03L-0:on 831231,while in Mode 1,invalid Fire Alarm for Fire Detection Zone Efa 116 Received in Control Room.Caused by Carbon Dust on Detector.Detector Cleaned & Alarm Reset (← links)
- 05000369/LER-1983-051-03, /03L-0:on 830704,filter Package Fan Failed to Remain Energized for 10 H During Control Room Area Outside Air Pressure Train B Test.Caused by Undersize Overload Heaters.Heaters Replaced (← links)
- 05000369/LER-1994-006-03, :on 941101,three AF to SG Isolation Valve Determined to Be Past Inoperable Due to Fabrication Deficiency in Vendor Supplied Testing Software.Differential Pressure Test Data Acceptable (← links)
- 05000369/LER-1983-120-03, /03L-0:on 831221,fire Retardant Packing of Fire Barrier Penetration Discovered Missing.Cause Unknown.New Packing Installed & Penetration Tested & Declared Operable (← links)
- 05000369/LER-1983-115-03, /03L-0:on 831129,annulus Ventilation Train a Unable to Meet Required Vacuum Decay Time & Declared Inoperable.Caused by Poor Sealing on Annulus Doors.Seals Replaced,Shimmed & Adjusted (← links)
- 05000369/LER-1983-002-03, /03L-0:on 830110,while in Mode 1,pressurizer Heater Group 1B Failed to Energize in Manual & Declared Inoperable.Cause Under Investigation.Design Defect Indicated in Vacuum Breaker Contractor Coil Circuit (← links)
- 05000369/LER-1982-079-03, /03L-0:on 821118,centrifugal Charging Pump 1A Declared Inoperable When Excessive Leakage from Pump Seals Noted.Caused by Pump Shaft Slinging Water Out of Seal Leakage Basin.Drain Line Cleared & Pump Returned to Svc (← links)
- 05000369/LER-1983-061-03, While in Mode 3,radiation Monitor EMF-17 Was in Alarm Due to Increase in General Background Activity.Caused by Receipt of Spent Fuel from Oconee.Trip Setpoints Set Higher (← links)
- 05000369/LER-1983-118-03, /03L-0:on 831206 & 08,fire Alarm for Fire Detection Zone EFA77 Received & Would Not Reset.Cause of 831206 Event Was Water Accumulation in One Detector.Cause of 831208 Event Undetermined.Detectors Replaced (← links)
- 05000369/LER-1991-007-02, :on 910519,Train B of RHR Sys Inoperable for More than 72 H W/O Knowledge of Operations Control Room Personnel.Caused by Inappropriate Personnel Actions & Installation Deficiency.Work Request Written (← links)
- 05000369/LER-1991-005-03, :on 910515,both Trains of Annulus Ventilation Sys Declared Inoperable Due to Inappropriate Action.Caused by Mgt Deficiencies & Deficient Communication.Meeting Held Between Mnt Paint Craft Personnel (← links)
- 05000369/LER-1983-091-03, /03L-0:on 830926,QA Audit of Completed Fire Door Insps Revealed That Fire Door 806D Not Inspected During Weekly Insps.Caused by Maint Supervisor Unfamiliarity W/Tech Spec Surveillance Requirements (← links)
- 05000369/LER-1983-050-01, /01T-0:on 830930,discovered That Equipment/Cable Interfaces Using Crouse-Hinds Conduit Coupling as Sealing Method May Be Susceptible to Moisture Seepage.Caused by Design Oversight in Failure to Test Connections (← links)
- 05000369/LER-1983-085-01, /01T-0:on 830930,discovered That Equipment/Cable Interfaces Using Crouse-Hinds Conduit Coupling as Sealing Method May Be Susceptible to Moisture Seepage.Caused by Design Oversight in Failure to Test Connections (← links)
- 05000369/LER-1983-084-01, /01T-0:on 830929,nuclear Svc Water Train a Declared Inoperable After Containment Spray Sys Train B Declared Inoperable on 830928,constituting Degraded Mode. Caused by Water in Oil Reservoir for Pump 1A (← links)
- 05000369/LER-1994-007-02, :on 941024,DG 1B Experienced Inadvertent Manual Start Due to Unknown,Possible Equipment Malfunction.Dg Circuitry Investigated to Validate That No Problems Exist & Determined That No ESF Signal Occurred (← links)
- 05000369/LER-1983-077-03, /03L-0:on 830907,while in Mode 1,Channel 4 of Loose Parts Monitor Declared Inoperable Because of Circuit Noise & Continuous Alarm.Probably Caused by Short in Accelerometer or Flexible Cable (← links)
- 05000369/LER-1994-009, :on 941125,boron Dilution of Unit 1 VCT Occurred Due to Procedural Deficiencies Caused by Inadequate Self Checking.Procedure CP/0/A/8400/10 Placed on Administrative Hold (← links)
- 05000369/LER-1991-008, :on 910514,concern Raised by Insp Member That, Under Certain Postulated Conditions,Diesel Generators Could Be Rendered Inoperable.Caused by Design Deficiency.Piping on Main Steam Drain Lines Upgraded (← links)
- 05000369/LER-1983-046-03, /03L-0:on 830617,following Identification of burned-out Preheater Element on 830403,outside Air Pressure Filter Train B Declared Inoperable.Caused by Component Failure & Personnel Error.Element Replaced (← links)
- 05000369/LER-1983-029-01, /01T-0:on 830601,Westinghouse Notified Util That Extended Operation at Low Power & Subsequent Escalation to Power in Same Fuel Cycle Would Result in Heat Flux Hot Channel Factor Limit Violations for LOCA Analysis (← links)
- 05000369/LER-1983-043-01, /01T-0:on 830601,Westinghouse Notified Util That Extended Operation at Lower Power & Subsequent Escalation to Power in Same Fuel Cycle Would Result in Heat Flux Hot Channel Factor Limit Violations to LOCA Analysis (← links)
- 05000369/LER-1983-042-03, /03L-0:on 830609,diesel Generator 1B Declared Inoperable When Two Unsuccessful Attempts Made to Load Generator.Caused by Inaccurate Timing.Test Procedure Revised to Allow for 3 Minute Wait (← links)
- 05000369/LER-1983-067-03, /03L-0:on 830806,during Surveillance,Upper Head Injection Level Switch Setpoints Found Out of Tolerance. Caused by Design Deficiency.Mod to Replace Switches W/Transmitters Will Be Implemented (← links)
- 05000369/LER-1983-065-03, /03L-0:on 830725,27,0810,12,21,24 & 25,pressurizer Heater Group 1B Declared Inoperable.Caused by Various Component Malfunctions or Failures & Design Deficiency.Fuses & Transformer Replaced (← links)
- 05000369/LER-1983-032-03, /03L-0:on 830513,control Area Ventilation Sys Train a Failed to Meet Pressurization Criteria.Caused by Degradation of Door Seals & Lack of Trip Interlocks.Door Seals Taped & Later Replaced.Test Rerun (← links)
- 05000369/LER-1983-028-01, /01T-0:on 830525,impulse Lines for Two Redundant Steam Generator 1D Level Instruments Came within 2 Inches of Each Other at One Point.Caused by Const/Installation Deficiency.One Line Rerouted (← links)
- 05000369/LER-1983-029-03, /03L-0:on 830510 & 15,boron Concentration Dropped Below 1,900 Ppm in Cold Leg Injection Accumulator.Caused by Leakage Into Accumulator from RCS Through Check Valves 1NI70 & 1NI71.Valves Repaired (← links)
- 05000369/LER-1983-027-03, /03L-0:on 830505,discovery of Water in Outside Air Pressure Filter Train 2 Led to Control Area Ventilation Sys Train B Inoperability.Caused by Water Backflow Through Drain Lines Into Filter Package.Filter Cleaned (← links)
- 05000369/LER-1983-062-03, /03L-0:on 830725,while in Mode 1,transformer 1B Auto Tripped Due to Two Out of Three Indication of Low Oil Level.Caused by Low Oil Level Relays Accidentally Bumped During Cleaning of Transformer.Relays Reset (← links)
- 05000369/LER-1983-063-03, /03L-0:on 830718,conventional Waste Water Treatment Discharge Flow Instrument Not Operating Properly. on 830725,composite Sampler Not Operating for Approx 1 Wk. Caused by Blown Fuse.Fuse Replaced (← links)
- 05000369/LER-1983-059-03, /03L-0:on 830719,21 & 25,radiation Monitors EMF-38 (Particulate) & EMF-39 (Gaseous) Declared Inoperable Due to Loss of Sample Flow Alarms.Caused by Leak in Containment from Valve NC-18 (← links)
- 05000369/LER-1983-064-03, /03L-0:on 830728,invalid Alarm Received on Fire Detection Zone Efa 136.Caused by High Humidity &/Or Dust Concentration in Honeywell Detector TC 100C Due to Leak from Valve 1NC-18.Detector Replaced (← links)
- 05000369/LER-1983-060-03, /03L-0:on 830719,periodic Reactor Coolant Leakage Calculation Test Indicated Unidentified Leakage Greater than Tech Spec Limit.Caused by Valve 1NC-18 Leaking. Replacement Valve Will Be Installed (← links)
- 05000369/LER-1983-058-03, /03L-0:on 830717,channel III Reactor Coolant Loop C Flow Instrumentation Read Low & Declared Inoperable.Caused by Out of Tolerance Westinghouse Veritrak 59DP4E99-7050 Flow Transmitter (← links)
- 05000369/LER-1983-056-03, /03L-0:on 830714,control Area Ventilation Sys Train B Declared Inoperable Due to Low Refrigerant Temp Trip of Control Room Area Chiller B Which Failed to Reset.Caused by Loose Flange on Suction Side of Compressor (← links)
- 05000369/LER-1983-057-03, /03L-0:on 830716 & 21,while in Mode 1,reactor Coolant Loop B Over Temp Delta T Instrument Loop Found Reading Higher That Other Channels During Routine Surveillance.Caused by Chiller Problems (← links)
- 05000369/LER-1983-020-01, /01T-0:on 830503,soap Bubble Test of 47 Secondary Containment Bypass Leakage Paths Not Performed During Initial Integrated Leak Rate Test.Caused by Procedural Deficiency.Procedures Revised (← links)
- 05000369/LER-1983-021-03, /03L-0:on 830419,while in Mode 5,nuclear Svc Water Sys Valve 1RN-69 Actuator W/Mechanical Latch Replaced by Actuator Requiring Electrical Antihammer Circuit.Caused by Deficient Procedure (← links)
- 05000369/LER-1983-022-03, /03L-0:on 830421,bellows Leak Test Not Performed on Penetration M354 After Initial Integrated Leak Rate Test.Caused by Procedural Deficiency Since Penetration Not Listed in Initial Procedures (← links)
- 05000369/LER-1983-023-01, /01T-0:on 830506,discovered That RHR Sys (Nd) Train a Improperly Declared Operable on 830423 & Subsequent Change from Mode 5 to Mode 4 Occurred on 830428.Caused by Water Hammer Failures (← links)
- 05000369/LER-1983-033-03, /03L-0:on 830701,two Programmed Setpoint Circuit Cards of Each Steam Generator Water Level low-low Channel Not Tested During Required Monthly Surveillance.Cause Not Known.Monthly Surveillance Procedure Revised (← links)
- 05000369/LER-1983-054-03, /03L-0:on 830701,two Programmed Setpoint Circuit Cards of Each Steam Generator Water Level low-low Channel Not Tested During Required Monthly Surveillance.Caused by Procedural Deficiency.Surveillance Procedure Revised (← links)
- 05000369/LER-1983-053-03, /03L-0:on 830701,quadrant Power Tilt Ratio Exceeded Tech Spec Limits During Startup Power Increase. Caused by in-core Xenon Imbalance of Unknown Origin.Neutron Flux Increased,Eliminating Xenon by Burnup (← links)
- 05000369/LER-1983-013-03, /03L-0:on 830315,during Upperhead Injection Level Switch Calibr,Switches Found Out of Tolerance.Caused by Design Deficiency.Rev to Tech Specs Changing Switch Setpoint Submitted (← links)
- 05000369/LER-1983-016-03, /03L-0:on 830327,hanger 1MCA-ND-H260 Discovered Pulled Loose from Wall Anchors & Snubbers 1MCA-ND-H177 & H317 Found Locked Up During Subsequent full-stroking.Caused by Water Hammer Event Resulting in Void Formation (← links)
- 05000369/LER-1983-014-03, /03L-0:on 830303,routine Surveillance on Conventional Waste Water Sys Radiation Monitor 1EMF-31 Found Channel Out of Tolerance.Caused by Cracked Detector Crystal. Crystal Replaced W/High Temp Crystal (← links)
- 05000369/LER-1983-012-03, /03L-0:on 830302,four Existing Auxiliary Feedwater Flow Transmitters Determined Not Environmentally Qualified for 330 F Main Steam Break Environ.Transmitter Overlooked in Review Response to NUREG-0588 (← links)
- 05000369/LER-1991-002-02, :on 910213,trains a & B of Control Area Ventilation Sys Inoperable Due to Unknown Causes.Ops Personnel Tech Spec 3.0.3 on Both Units on 910213 & Perf Personnel Exited Flow Balance Test (← links)
- 05000369/LER-1983-009-03, /03L-0:on 821112,during Troubleshooting & Checkout Activities Following Diesel Generator Mod Work,Diesel Generator 1B Experienced Failures.Caused by Wires on Wrong Terminal,Burned Diodes & Spurious Low Crankcase Signals (← links)
- 05000369/LER-1983-010-03, /03L-0:on 830216,while in Mode 6,control Room Outside Air Intake Radiation Monitors 1EMF-43A &43B Declared Inoperable.Caused by Personnel Error.Monitors Returned to Svc & Inlet Valves Opened After Testing (← links)
- 05000369/LER-1983-040-03, /03L-0:on 830604,06 & 28,Fire Detection Zones Efa 76,150 & 103 Declared Inoperable Due to Invalid Alarms. Caused by Spurious Alarms & High Dust Concentration.Smoke & Fire Ionization Detectors Replaced (← links)
- 05000369/LER-1983-037-03, /03L-0:on 830602,main Steam Code Safety Relief Valve ISV-9 Lifted,W/Main Steam Pressure Below Acceptable Lift Setpoint Range,During Reactor Trip Transient.Caused by Setpoint Drift,Probably Due to Vibration (← links)
- 05000369/LER-1983-038-03, /03L-0:on 830527,narrow-range Levels of Steam Generators Not Verified within 4% of Average Value.On 830605,ice Condenser Monitoring Sys & Applicable Instrument Items Missed.Caused by Personnel Error (← links)
- 05000369/LER-1983-039-03, /03L-0:on 830606,control Room Ventilation Sys Train a Failed Control Room Pressurization Test Performed in Response to Control Room Door Mod.Caused by out-of- Position Manual Damper (← links)
- 05000369/LER-1983-041-03, /03L-0:on 830607,containment Hydrogen Monitor a Hydrogen Analyzer Gas Flow Found out-of-spec.Caused by Partially Blocked Flow Path.Monthly Test Performed Again on 830610 & Monitor Declared Operable (← links)
- 05000369/LER-1983-036-03, /03L-0:on 830524 & 26,listed Functional Test Procedures Failed to Satisfy Monthly Setpoint Requirements. Caused by Failure to Identify & Incorporate Changes Into Procedures.Setpoints Verified (← links)
- 05000369/LER-1983-008-03, /03L-0:on 830124,weekly Composite Sample Analysis Not Performed for Conventional Waste Water Treatment Sys Continuous Discharge.Caused by Personnel Error & Procedural Deficiency.Procedures Will Be Changed by 830331 (← links)
- 05000369/LER-1983-034-03, /03L-0:on 830515,cold Leg Injection Accumulator (Cla) a Declared Inoperable Due to Vol Exceeding Tech Spec Limits.Caused by Leakage Through Valve Seats of Valves 1NI-55,1NI-56 & 1NI-57.Valves Replaced (← links)
- 05000369/LER-1983-031-03, /03L-0:on 830512,reactor Coolant Pump Taken Out of Svc Following Sporadic Low Oil Level Alarms from Pump Motor 1D Upper Reservoir.Level Found Slightly Low.Cause Not Determined.Oil Added.Pump Restarted (← links)
- 05000369/LER-1994-005-01, :on 940711,addition of Demineralized Water to SFP During Decontamination Caused Boric Acid Concentration to Be Lowered from 2,105 Ppm to 1,957 Ppm.Approx 1,000 Kg of Boric Acid Added to Pool (← links)
- 05000369/LER-1983-026-03, /03L-0:on 830430,performance of RCS Leakage Calculation Determined Unidentified Leakage Greater than 1 Gpm.Caused by Leakage Past Bonnet Seal Ring on Valves 1NC-18 & 1NV-239.Valves Sealed (← links)
- 05000369/LER-1983-025-03, /03L-0:on 830508,while in Mode 2,fire Detection Sys Zones 72 & 149 Declared Inoperable Due to Alarms Remaining in Alarm Condition.Fire Watch Patrols Established. Caused by Control Interface Module failure.W830527 Ltr (← links)
- 05000369/LER-1983-024-03, /03L-0:on 830426,Fire Door 1000B Declared Inoperable When Damage,Consisting of Bent Door,Broken Hinge, Bent Hinge,Broken Door Lock & Broken Door Closer Discovered. Cause Unknown.Fire Watch Established (← links)
- 05000369/LER-1983-018-03, /03L-0:on 830407,following Identification of Inoperable RHR Sys (Nd) Hanger & Snubbers,Sys Walkdown Revealed Addl Hanger Failure.Caused by Nd Sys Water Hammer. Hangers Repaired & Procedures Revised (← links)
- 05000369/LER-1982-048-03, /03L-0:on 820605,after Receiving Battery Evcd Trouble Alarm,No Indication Received on Pressurized Power Operated Relief Valve NC-32 & Valve Not Operable.Caused by Ground Which Blew Fuse.Valve Repaired (← links)
- 05000369/LER-1982-056-01, /01T-0:on 820705,during Shutdown for Steam Generator Insp,Sleeves for Reactor Coolant Loop B Found Not in Place.Caused by Welds Failing to Interface to Nozzle Wall.Loose Parts Monitoring Sys Installed (← links)
- 05000369/LER-1983-019-03, /03L-0:on 830413,representative Fuel Pool Ventilation Sys Carbon Filter Sample Analysis Indicated Sample Failed to Meet Methyl Iodide Penetration Criteria. Sample Analyses Made to Determine Cause (← links)
- 05000369/LER-1982-007-03, /03L-0:on 820111,many Instrument Lines Froze W/ Instruments Declared Inoperable Leading to Inadvertent Actuation of ESF Causing Safety Injection,Steamline Isolation & Reactor Trips.Caused by Cold Weather (← links)
- 05000369/LER-1982-010-03, /03L-0:on 820120,while in Mode 1,all Digital Rod Position Indications for Control Rod K-8 Lost.Caused by Cabling to Detectors Susceptible to Conductor Damage Due to Own Weight.Bulkhead Connector Cable Replaced (← links)
- 05000369/LER-1982-008-03, /03L-0:on 820115,exam of Programs on Operator Computer Revealed Equipment Run Time on Fuel Pool Ventilation Sys Exceeded Tech Specs W/O Sample Being Taken from Charcoal Absorber.Caused by Lack of Procedure (← links)
- 05000369/LER-1983-006-03, /03L-0:on 830131,unit Changed from Mode 5 to 6 W/ Control Room Area Outside Air Pressure Filter Train 2 (VC-B) Inoperable.Subj Train & VC Train a Inoperable on 830125,26 & 29.Caused by Misinterpretation of Tech Specs (← links)
- 05000369/LER-1983-007-03, /03L-0:on 830131,vent Radiation Monitors 1EMF-35, 36 & 37 Declared Inoperable Following Loss of Sample Flow Alarm.Caused by Clogged Charcoal Filter.Filter Replaced (← links)
- 05000369/LER-1983-005-03, /03L-0:on 830127,while in Mode 5,evaluation of Initial Ice Condenser Basket Weights Found Numerous Accessible Row 8 & 9 Baskets Had Net Ice Weights Below Tech Specs.Caused by Heat Loading & Air Current (← links)
- 05000369/LER-1983-004-03, /03L-0:on 830121,during Monthly Battery Insp,Cell 9 of Battery Evca Had Specific Gravity Below Tech Spec Limit.Caused by Normal Degradation.Bus Evda Tied to Operable Battery Bank.Cell 9 Jumpered Out & Battery Returned to Svc (← links)
- 05000369/LER-1983-003-03, /03L-0:on 830117,during Mode 1 Weekly Sampling Collection,Conventional Waste Water Treatment Composite Sampler Found Inoperable.Caused by Frozen Sample Line Due to Improper Installation of Insulation.Insulation Reinstalled (← links)
- 05000369/LER-1982-082-03, /03L-0:on 821231,while in Mode 5,three Instrument Loops Found Out of Tolerance.Caused by Differential Pressure Transmitter Drift.Transmitters Recalibr (← links)
- 05000369/LER-1991-006, :on 910215,containment Air Return & Hydrogen Skimmer Sys Declared Inoperable.Caused by Design Deficiency. to Procedures Revised to Exclude Hydrogen Skimmer Fans & Dampers (← links)
- 05000369/LER-1991-004-01, :on 910219,reactor Trip Occurred Due to Manual Opening of Reactor Trip Breaker.Caused by Mgt Deficiency & Possible Inappropriate Action.Emergency Procedure EP/1/A/5000/01 Implemented (← links)
- 05000369/LER-1991-001-04, :on 910211,reactor Trip Occurred.Caused by Loss of Offsite Power Causing Inappropriate Action,Management Deficiency & Equipment Failure.Emergency Shutdown & Offsite Power Restored (← links)
- 05000369/LER-1982-080-03, /03L-0:on 821122,discrepancies Discovered in Intermediate Range Internal Picoampere Source & Log Current Amplifier Calibr Procedures.Caused by Improper Procedure Options.Channels Recalibr & Procedures Revised (← links)
- 05000369/LER-1982-078-03, /03L-0:on 821108,during Draining of Rcs,Both Centrifugal Charging Pumps Inoperable.Caused by Confusing Statement in Draining Procedure Allowing Both Breakers to Be Racked Out & Tagged.Procedure Revised & Personnel Counseled (← links)
- 05000369/LER-1982-077-03, /03L-0:on 821105,eight Procedure Change Cards of Each Reactor Protection Sys Channel Omitted from Overlap Testing.Caused by Inadequate Procedures.Omitted Cards Calibr & Procedural Changes Approved (← links)
- 05000369/LER-1990-023, :on 900821,both Trains of Control Room Ventilation Sys Inoperable During Mod & Functional Testing. Caused by Sheared Off Detensioning Bolts on Air Handling Unit Motor Base.Train a Redesigned (← links)
- ML051310167 (redirect page) (← links)
- 05000369/LER-2005-006, Automatic Reactor Trip and Auxiliary Feedwater System Actuation Due to Steam Generator Hi--Hi Water Level (← links)
- 05000370/LER-2005-007, Re Power Reduction Due to Entry Into LCO 3.0.3 Caused by Inoperable Control Room Area Cooling Water System (← links)
- 05000369/LER-2005-004, Ice Condenser Lower Inlet Door Failed Surveillance Testing (← links)
- 05000369/LER-2005-003, Re Containment Closure Requirements Not Met During Core Alterations (← links)
- 05000369/LER-2005-005, Re Inoperable Source Range Neutron Flux Monitors During Mode 6 and Core Alterations (← links)
- 05000370/LER-2005-006, Failure of Containment Floor and Equipment (Cfae) Sump Discharge Outside Containment Isolation Valve to Fully Close (← links)
- 05000370/LER-2005-005, Regarding Failure of Main Steam Line Isolation Valve (MSIV) to Close (← links)
- 05000369/LER-2005-002, Regarding Main Steam Isolation Valve Inoperable Due to Internal Binding (← links)
- 05000370/LER-2005-004, Re Actuation of Main Steam Isolation Valves Due to Human Error (← links)
- 05000370/LER-2005-003, Re Containment Closure Requirements Not Met During Core Alterations (← links)
- 05000370/LER-2005-002, Re Ice Condenser Lower Inlet Door Failed Surveillance Testing (← links)
- 05000370/LER-2005-001, Automatic Actuation of Motor Driven Auxiliary Feedwater Pumps During Outage (← links)