Pages that link to "05000278/LER-1981-015, Forwards LER 81-015/01T-1.Detailed Event Analysis Submitted"
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The following pages link to 05000278/LER-1981-015, Forwards LER 81-015/01T-1.Detailed Event Analysis Submitted:
Displayed 50 items.
- 05000277/LER-1981-002, Forwards LER 81-002/01T-0 (← links)
- 05000277/LER-1981-013, Forwards LER 81-013/01T-0.Provides Narrative Description of 810203 Occurrence Re Failure of Valves to Meet Seismic Qualification Requirements (← links)
- 05000277/LER-1981-028, Forwards LER 81-028/01T-0.Detailed Event Analysis Also Submitted (← links)
- 05000277/LER-1981-004-01, /01P-0:on 810114,while Operating at 100% Power, During Routine Surveillance Test of Diesel Generator,Breaker E-32 Failed to Close on Request.Caused by Unidentified Mechanical Deficiencies.Breaker Replaced & Tested (← links)
- 05000277/LER-1981-028-01, /01T-0:on 810428,determined That More Detailed Analysis Was Required & Minor Mods Were Necessary to Assure That Certain Fans Would Perform During Earthquakes.Caused by Fan Supports Not Meeting Seismic Requirements (← links)
- 05000277/LER-1981-024-03, /03L-0:on 810407,recirculation Pump Drive Flow Increase of 10% within 5 Minutes Was Indicated.Cause Undetermined.Investigation Ongoing.Entire Flow Loop Instrumentation Is Being Calibr (← links)
- 05000277/LER-1981-021-03, /03L-0:on 810329,while at Full Power,Drywell Pressure Channel D Found Malfunctioning.Caused by Electronic Failure in Rosemount Model 1151 GP Pressure Transmitter. Circuit Boards on Transmitter Replaced (← links)
- 05000277/LER-1981-020-03, /03L-0:on 810325,inboard Containment Radioactive Gas Sampler Isolation Valve SV-2671A Found Leaking.Caused by Plunger Assembly Sticking Due to Dirt Accumulation.Valve Cleaned (← links)
- 05000278/LER-1981-011-03, /03L-0:on 810307,seven MSIVs Failed Individual Tech Spec Leakage Limits.Single Valves Failed on HPCI 2-inch Turbine Exhaust Line.Test Taps Failed on Reactor Core Isolation Cooling 10 & 2-inch Exhaust Lines.Cause Unknown (← links)
- 05000277/LER-1981-018-03, /03L-0:on 810306,local Leak Rate Test Determined Excessive Leakage from Manual Isolation Valve SV-2671A. Caused by Dirt Buildup on Seating Surface,Preventing Proper Valve Disc Seating.Valve Cleaned & Returned to Svc (← links)
- 05000277/LER-1981-016-03, /03L-0:on 810225,reactor Core Isolation Cooling Trip Throttle Valve Would Not Reset to Normally Open Position Using Limitorque Operator,Following Manual Trip. Caused by Worn Worm Gear in Trip Throttle Valve Operator (← links)
- 05000277/LER-1981-017-03, /03L-0:on 810318,all Inboard Sample Isolation valves,SV-2671A-SV2671G,closed.Caused by Short in Coil of dymo-type Solenoid Valve SV-2671A,which Blew Common Fuse in Control Circuit for All Seven Valves (← links)
- 05000278/LER-1981-006-03, /03L-0:on 810227,core Spray Logic Sys B Failed. Caused by Blown Fuse Due to Grounded Lug on Core Spray Pump Circuit Breaker D Latch Check Switch.Circuit Breaker Replaced & Lug on Grounded Circuit Breaker Repositioned (← links)
- 05000277/LER-1981-012-03, /03L-0:on 810202,main Steam Line Monitor D Indicated Low Level Radiation Resulting in Trip Setpoint Above Tech Spec Limit.Caused by Instrument Zero Drift. Monitor Calibr & Returned to Svc (← links)
- 05000278/LER-1981-007-03, /03L-0:on 810206,main Steam Line Monitor a Indicated Low Level Radiation Resulting in Trip Setpoint Above Tech Spec Limit.Caused by Instrument Zero Drift. Monitor Calibr & Returned to Svc (← links)
- 05000277/LER-1981-002-01, /01T-0:on 810105,reactor Core Isolation Cooling Pump Flow Indication Failed Rendering Automatic Flow Control Sys Inoperable.Caused by Electronic Failure of Square Root Extractor in Flow Control Circuitry.Extractor Replaced (← links)
- 05000277/LER-1981-003-03, /03L-0:on 810112,DPIS 2-14-43B,core Spray Sparger to Reactor Pressure Vessel Dp Switch Found Set Below Tech Spec Limit.Caused by Barton Model 288 Dp Switch Failure Due to Setpoint Drift.Switch Recalibrated & Returned to Svc (← links)
- 05000278/LER-1981-022-03, /03L-0:on 811221,during Surveillance Testing, Torus High Level Switches 3-23-91-A & B Determined to Be Out of Calibr by 1/2 Inch.Instruments Are Robertshaw Type 83035-A2.Caused by Setpoint Drift.Instruments Recalibr (← links)
- 05000277/LER-1981-047-03, /03L-0:on 811225,torus Water Cleanup Pump Suction Valve Failed Upon Initiation,Rendering Sys Inoperable. Caused by Stripped Worm Gear on Limitorque Operator.Gear Replaced & Valve Tested (← links)
- 05000278/LER-1981-021-03, /03L-0:on 811211,D Core Spray Pump Failed to Start During Surveillance Test Due to Failure of Pump Breaker to Close.Cause Not Determined.Failed Breaker Replaced & Checked Daily for 2 Wks to Verify Core Spray Sys Operability (← links)
- 05000278/LER-1981-019-03, /03X-1:on 811121,drywell Wide Range Pressure Recorder PR-3508 Did Not Receive Signal & Was Declared Inoperable.Caused by Intentional Internal Ground in Printed Circuit Assembly.Floating Dc Sys Substituted (← links)
- 05000278/LER-1981-020-03, /03L-0:on 811207,reactor Coolant Isolation Cooling Torus Suction Valve MO-3-13-41 Failed to Stroke.Caused by Broken Indicating Rod Jammed within Guide Cap.Broken Rod Removed & Valve Successfully Stroked Electrically (← links)
- 05000277/LER-1981-045-03, /03L-0:on 811127 & 1202,containment Atmospheric Dilution (CAD) Sys Tank Level Decreased Below Tech Spec. Caused by Open Relief Valve Due to Setpoint Drift of Pressure Control Valve on CAD Sys Liquid Nitrogen Tank (← links)
- 05000278/LER-1981-018-03, /03L-0:on 811124,HPCI Turbine Steam Supply Valve MO-3-123-14 Failed Shut & Sys Declared Inoperable.Caused by Blown Fuse in Valve Motor Circuit.Fuse Replaced (← links)
- 05000278/LER-1981-012-03, /03L-0:on 810428,snubber from a Recirculation Pump Discharge Header Found to Have Locking Velocity Under Compression Less than Acceptable Value.Cause Not Determined. Snubber to Be Recalibr (← links)
- 05000277/LER-1981-033-03, /03L-0:on 810510,motor Driven Fire Pump Taken Out of Svc & Not Tested for More than 7 Days.Caused by Work Involved in Removing Mud from Pump Suction Bays (← links)
- 05000277/LER-1981-046-01, /01T-0:on 811205,trip Setpoints Raised Above Tech Spec Range to Aid Restart of Ventilation Sys.Caused by High Temp Alarms & Isolation Channel Trip After Loss of Reactor Bldg Ventilation.Tech Spec Change Pending (← links)
- 05000277/LER-1981-046, Forwards LER 81-046/01T-0.Detailed Event Analysis Submitted (← links)
- 05000278/LER-1981-017-03, /03L-0:on 811109,reactor Core Isolation Cooling High Steam Flow Isolation Switch Exceeded Tech Spec Limit. Caused by Setpoint Drift of Barton Model 288 Dpis.Instrument Recalibr (← links)
- 05000278/LER-1981-015-01, /01X-1:on 811023,offgas Sampling Sys Found Not Receiving Sufficient Flow.Caused by Sample Line Root Valve That Had Been Closed During Welding.Valve Opened & Added to Sys Checkoff List (← links)
- 05000277/LER-1981-044-03, /03L-0:on 811105,E-1 Diesel Declared Inoperable After Failing to Start in 4 of 7 Tries.Caused in 2 Attempts by Failure to Wait 60-s Before Restart.Cause of Other Failures Unknown.Thirty Successive Good Starts Followed (← links)
- 05000278/LER-1981-016-03, /03L-0:on 811027,during Surveillance Testing,Speed Control Problems W/Reactor Core Isolation Cooling Sys Were Observed.Caused by Electronic & Hydraulic Speed Controls Being Out of Tolerance.Adjustments Made to Components (← links)
- 05000278/LER-1981-009-03, /03L-0:on 810216,during Surveillance Test,Oil Leak of 3-5 Gpm Found on Oil Supply Line to HPCI Turbine Manual/ Overspeed Trip Mechanism.Caused by Ruptured Diaphragm in Oil Line Pressure Control Valve VC-210 (← links)
- 05000278/LER-1981-002-03, /03L-0:on 810109,HPCI Turbine Exhaust Inboard Drain Isolation Valve AO-5247 Failed to Stroke Fully.Caused by Cocked Valve Packing Follower Preventing Free Valve Stem Travel.Follower Realigned & Packing Retensioned (← links)
- 05000277/LER-1981-007-03, /03L-0:on 810103,average Power Range Monitor Flux Scram Trip Setting Was Outside Tech Spec.Caused by Engineer Failure to Make Adjustments to Setting Gains.Gains Reset & Personnel Reinstructed in Importance of Monitoring Gain (← links)
- 05000277/LER-1981-005-03, /03L-0:on 810116,torus Vent Valve AO-2514 Failed to Close Upon Receipt of Group Three Isolation Signal & W/Use of Remote Valve Control Switch.Caused by Sticking Solenoid Valve Asco 8300 D9RF.Valve Freed & Replaced 810116 (← links)
- 05000278/LER-1981-001-01, /01P-0:on 810101, While Operating at 100% Power, During Surveillance Testing,Core Spray Pump D Was Found Nonoperable.Caused by de-energized Condition of Springs in 4 Kv Circuit Breaker.Breaker Replaced (← links)
- 05000277/LER-1981-042-03, /03L-0:on 811021,gland Seal Condenser Bottom Head Gasket Developed Leak & HPCI Sys Declared Inoperable.Caused by Displacement of Gasket on Sealing Surface Between Condenser Shell & Bonnet (← links)
- 05000277/LER-1981-043-04, /04T-0:on 811105,during Surveillance Test, Indicated Limit for Usage of Soda Ash Was Exceeded.Some Bags Stored Outside Hardened & Were Disposed Of,But No Records Substantiate Losses.Evaluating Problem Further (← links)
- ML20032E985 (redirect page) (← links)
- 05000278/LER-1981-015 (redirect page) (← links)
- 05000277/LER-1981-040-01, /01T-0:on 810923,review of Rockbestos RSS-6-104 & RSS 6-110 Cables,Used in Safety Relief Valve Acoustic Monitoring Sys,Revealed Potential Failure at Elevated Temps Following LOCA or Pipe Break Accident (← links)
- 05000277/LER-1981-040, Forwards LER 81-040/01T-0.Detailed Event Analysis Encl (← links)
- 05000277/LER-1981-039-01, /01T-0:on 810827,C Average Power Range Monitor Found Receiving Only One Low Power Range Monitor (LPRM) Input to C Level.Caused by 810818 LPRM 32-49C Failure & Operator Failure to Recognize Situation (← links)
- 05000277/LER-1981-039, Forwards LER 81-039/01T-0.Detailed Event Analysis Encl (← links)
- 05000278/LER-1981-013-01, /01T-0:on 810830,personnel Discovered Water Backed Up Out of Floor Drain Sys Flowing Under Railroad Doors. Caused by Blockage in Drain Sys.Blockage Cleared,Water Pumped Out & Processed Through Radwaste (← links)
- 05000278/LER-1981-013, Forwards LER 81-013/01T-0.Detailed Event Analysis Submitted (← links)
- 05000277/LER-1981-037-01, /01T-0:on 810808,HPCI Turbine Exhaust Line Drain Valve A04248 Failed Closed & Redundant Isolation Valve Was Not Closed.Caused by Open Coil on Asco Solenoid Valve. Coil & Solenoid Valve Replaced (← links)
- 05000277/LER-1981-037, Forwards LER 81-037/01T-0.Detailed Event Analysis Submitted (← links)
- 05000277/LER-1981-041-03, /03L-0:on 810923,during HPCI Surveillance Tests, Leak Developed in Gland Seal Condenser Bottom Head Gasket. Caused by Gasket Failure at Bottom Head of Graham Mfg Co Vertical Gland Seal Condenser.Gasket Replaced (← links)