Pages that link to "NRC Form 3GG"
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The following pages link to NRC Form 3GG:
Displayed 50 items.
- 05000315/LER-1978-058-03, /03L-0 on 781003:rounding Off of T(Z) Resulted in Fz Calculations Being non-conservative in Top of the Core. Caused Apdms to Perform Stairstep Comparison to Fz Limit in the Top 1/2 of Core Height (← links)
- 05000260/LER-1983-063-01, Discovered 2-LT-85-45A (West Side SDIV Level Transmitter) Did Not Initiate Trip When SDIV Level Exceeded 50-gallon Setpoint.Caused by Small Puncture Holes in Module Diaphragm (← links)
- 05000362/LER-1983-025-03, /03L-0:on 830404,fire Spray Sys Spuriously Actuated.Fire Detectors Inoperable.Cause Unknown. Compensatory Measures Remained in Place Until Fire Spray Sys Returned to Svc on 830416 (← links)
- 05000316/LER-1982-022-01, /01T-0:on 820311,discovered Nonconformances to Amend 39 to Tech Specs Due to Receipt on 820327 W/Retroactive Effective Date of 820311.Operations Standing Order Issued Until Procedures Reflect Amended Tech Specs (← links)
- 05000315/LER-1982-049-03, /03L-0:on 820617,operator Discovered 4-kV Switch Gear Carbon Dioxide Sys Isolated W/O Personnel Listed on Entry Board.Caused by Frequent Entry & Exit of Personnel. Training Film Prepared (← links)
- 05000285/LER-1982-011-01, /01T-0:on 820521,blowdown Sampling Line for Steam Generator B Inboard Containment Isolation Valve HCV-2507A Found Closed Resulting in Failure to Monitor for Radioactivity.Caused by Inadvertent Closing of Valve (← links)
- 05000295/LER-1982-015-03, /03L-0:on 820331,containment Vent Isolation Valve 1AOV-RV0006 Failed to Fully Close Upon Receipt of High Radiation Signal.Caused by Loose Restraint Line.Restraint Line Secured & Valve Successfully Tested (← links)
- 05000316/LER-1982-026-03, /03L-0:on 820401,during Return to 100% Power Following Outage,West Feed Pump Turbine Tripped Requiring Rapid Power Reduction Causing Pressurizer Pressure to Drop Below Tech Spec Requirements (← links)
- 05000315/LER-1982-013-03, /03L-0:on 820302,control Switch for Containment Pressure Equalization Fan in Stop & Backdraft Damper for Opposite Fan Was Open.Cause Could Not Be Determined.Startup Procedures Revised (← links)
- 05000316/LER-1981-066-04, /04L-0:on 811127,no Flow Discovered on 4 Steam Generator Sample Line.Cause Not Stated.Steam Generator Blowdown Isolated (← links)
- 05000296/LER-1981-066-03, /03L-0:on 811107,during Refueling Outage,While Performing Reactor Bldg Vent Monitoring Sys Calibr, Continuous Air Monitor 3-RM-90-250 Failed to Pass on Gas & Particulate Channels.Caused by Component Failure (← links)
- 05000316/LER-1981-056-03, /03L-0:on 811019,review Revealed 811018 Mode Change Took Place W/O Surveillance on N Train Battery Current as Required.Caused by Lack of Signoff of Plant Heatup Procedure (← links)
- 05000346/LER-1981-051-03, /03L-1:on 810820 & 29,borated Water Storage Tank Channel 3 Level Failed High.Caused by Faulty Preamplifier Board.Board Replaced (← links)
- 05000366/LER-1981-079-03, /03L-0:on 810822,torus-to-atmosphere Hi Data Processing Switch 2T48-N210 Found to Actuate Above Tech Spec Limit During Static O-ring Pressure Switch Calibr HNP-2-5240.Caused by Setpoint Drift.Switch Recalibr (← links)
- 05000346/LER-1980-025-03, /03X-1:on 800330,control Rod Group 5,rod 11 Absolute Position Indication Declared Inoperable.Caused by Fluctuating Signals Resulting in Numerous Asymmetric Rod Alarms Due to Defective Reed Switch Assemblies (← links)
- 05000304/LER-1980-028-03, /03L-0:on 801110,steam Generator 2B Feed Flow Channel 2F-540 Out of Tolerance.Caused by Zero Shifting of Fisher Porter Transmitter.Transmitter Zero Adjusted & Channel Returned to Svc (← links)
- 05000346/LER-1980-058-01, /01T-0:on 800724,loss of Decay Heat Flow Observed Due to DH12 Going shut.DH11 Also Closed While Personnel Attempted to Restore Sfas CH4 Cabinet to Normal.Caused by Shorted Fuse Clip & Procedural Deficiency,Respectively (← links)
- 05000346/LER-1980-029-03, /03L-0:on 800419,breaker HBBF2 on Bus B Opened, Allowing Two Buses to de-energize.Caused by Ground Fault Relay Actuated from Mechanical Vibration & Electrical Lineup for Maint.Decay Heat Pump Was Vented & Restarted (← links)
- 05000304/LER-1980-018-03, /03L-0:on 800410,during Operability Test, Containment Air Sample Valve 2FCV-PR20B Failed to Close, Placing Containment in Isolation Sys in Degraded Mode of Operation.Caused by Solenoid Valve Failure to Vent (← links)
- 05000304/LER-1980-016-03, /03L-0:on 800411,during Normal Operation, Instrument Inverter 214 Tripped W/O Tripping Either Input or Output Breaker.Caused by Thyrister Failure in Slave Unit of Inverter.Thyrister Replaced (← links)
- 05000295/LER-1980-020-03, /03L-0:on 800403,following Unit 2 Trip,Unit 1 Air Ejector Monitor 1RT PR26 Failed.Caused by Detector Tube Being Crushed During Routine Filter Change.Tube Replaced. Detector Functionally Tested & Returned to Svc (← links)
- 05000346/LER-1980-030-01, /01T-0:on 800418,contrary to Tech Spec 3.4.1,decay Heat Pump 1-2 Stopped When RCS Water Level Decreased to 37 Inches Above Hot Leg Piping Centerline.Caused by Valve Operator Component Failure.Work Order Issued for Adjustment (← links)
- 05000295/LER-1980-013-03, /03L-0:on 800314,while Performing Periodic Radiation Surveillance of Auxiliary Bldg Area Monitor ORT-AR09,monitor Read Low by Factor Greater than Five.Caused by Instrument Drift by Normal Variation or Accidental Reset (← links)
- 05000304/LER-1980-013-03, /03L-0:on 800227,during Normal Operation,Maint Personnel Found Steam Generator Pressure Comparator 2PC-536A-B Shifted High by 1.5%.Caused by Defective Unit. Defective Unit Replaced W/Spare Unit (← links)
- 05000213/LER-1980-005-03, /03L-0:on 800207,leak Was Discovered in B Boron Waste Storage Tank Thermo Syphon Heater.Caused by Crack in Lower Head to Pipe Weld of Heater.New Lower Head Fabricated & Installed (← links)
- 05000346/LER-1979-108-03, /03L-0:on 791108,during Normal Plant Evaluation of Switching Decay Heat Removal Pumps,Pump 1 Failed to Start Remotely & Locally at Breaker.Caused by Faulty Cutout Switch.Switch Assembly Replaced (← links)
- 05000348/LER-1979-011-03, /03L-0 on 790221:while Doing FNP-1-STP-28.7,LOSP B1F Sequencer Failed to Meet Time Requirement for Picking Up Step 6.Caused by Agastat Timer Setpoint Drift.Agastat Timer Adjusted & Satisfactorily Retested (← links)
- 05000338/LER-1979-022-03, /03L-0 on 790227:power Supply to Post DBA H Recombiner Deenergized Rendering Recombiner Inoperable for 4-h.Caused by Deenergizing of Motor Control Center to Perform Voltage Measurements (← links)
- 05000346/LER-1979-060-03, /03L-0 on 790519:fire Barrier Removed to Allow Removal of Hydraulic Snubber,But Continuous Fire Watch Was Not Established.Caused by Faulty Procedure.Mod Made to Hydraulic Snubber Testing Procedure (← links)
- 05000346/LER-1979-001-03, /03L-0 on 790102:monthly Functional Test Not Performed on Reactor Protection Sys Channel 2 within Allowable Time.Caused by Breakdown in Communications Between Testing Personnel & Test Coordinator (← links)
- 05000346/LER-1979-029-01, /01T-2 on 790306:borated Water Storage Tank Isolation Valves DH7A & B Were Mistakenly Closed.Caused by Personnel Error.Valves Reopened & Auxiliary Operator Disciplined (← links)
- 05000321/LER-1979-091-03, /03L-0:on 791106,insurance Investigation Revealed Required Penetration Seal Not Installed in 2-inch Penetration in Control/Svc Bldg Firewall.Caused by Misinterpreted Drawings.Seal Installed (← links)
- 05000366/LER-1979-120-03, /03L-0:on 791113,emergency Diesel Generator Tripped While Performing Manual Start.Caused by High Engine Crankcase Pressure Due to Ejector Failure.Engine Ejector Cleaned & Reinstalled (← links)
- 05000346/LER-1979-129-03, /03L-0:on 791211,during Control Room Emergency Vent Sys 18-month Test ST 5076.02,charcoal Filter Bank in Unit 1-2 Failed to Meet Required Efficiency.Caused by Leak Between Filter Plate & Assembly.Plate Nuts Properly Torqued (← links)
- 05000293/LER-1979-036-01, /01T-0:on 791001,discovered That Portion of SSW Loop Piping B Could Be Overstressed During Seismic Event. Caused by Design Error.Plant Design Change Request Initiated to Reduce Stress to Acceptable Limits (← links)
- 05000346/LER-1979-082-03, /03L-0 on 790720:discovered That Containment post-accident Radiation Monitor Re 5030 Had Tripped.Caused by Sufficient Pump Wear Resulting in Low Flow Setpoint Being Reached.Pump Bypass Valve Adjusted (← links)
- 05000213/LER-1979-001-99, /99X-1 on 790214:Updates RO 79-01/IT on 790228 Re Batch 8 Fuel Failures.Most Defective Assemblies Removed from Core.Cause of Fuel Failure Still Unknown. Discusses Status of Current & Planned Investigations (← links)
- 05000346/LER-1979-067-01, /01T-0 on 790628:short Circuit Caused Loss of Essential Bus Y4 Sypplying Power to Safety Feature Actuation Sys.Blown Inverter Fuse Was Replaced & Y4 Bus Returned to Normal Supply (← links)
- 05000293/LER-1979-037-03, /03L-0:on 790919,stem Guide on Valve MOV-1001-36B Slipped Up,Exposing Valve Stem Guide Key.Caused by Loosened Allen Set Screw.Repairs Were Made & Sys Returned to Svc on 790919 (← links)
- 05000296/LER-2078-004, For Browns Ferry Nuclear Plant, Unit 3, Three of Five Test Specimens Failed During Simulated LOCA Conditions & During Qualification Testing of Bendix Electrical Connectors Identical to Those Used in Primary Containment (← links)
- 05000220/LER-2078-001, Re Delta Temperature of Discharge Water Exceeded Specification 2.1.5 of Environmental Tech Specs (← links)
- 05000220/LER-1980-018-03, /03L-0:on 800808,during Normal Operation, Emergency Diesel Generator 103 Fuel Oil Day Tank Low Level Alarm Was Received.Caused by Inadvertent Opening of Day Tank Drain Valve.Tank Refilled.Oil Valve Sys Locked (← links)
- 05000220/LER-1979-008-03, /03L-0 on 790510:during Refueling Outage, Containment Spray Heat Exchangers 112 & 121 Failed Leak Rate Test.Caused by Tube Leaks.Tubes Plugged (← links)
- 05000260/LER-1980-006-03, /03L-0:on 800203,while Running Electrical Checks on Recirculation Pump,Reactor Recirculation Pump 2A Was Accidentally Tripped.Caused by Misinterpretation of Labels on Recirculation Pump Trip Breakers (← links)
- 05000220/LER-1978-006, Re During Steady State Operation, Performance of Surveillance Test IC-75 Found a Trip Setpoint of 22.5 Inches Water on One Vacuum Switch in the Vacuum Relief System from the Pressure Suppression Chamber to the (← links)
- 05000220/LER-1978-009, And LER 78-010-00 for Nine Mile Point, Unit 1 Re Technical Specification Violations of Listed Sections (← links)
- 05000220/LER-1978-014, LERs 78-014,00, 78-016-00, and 78-016-00 for Nine Mile Point Unit 1 Regarding, Respectively, Discovery That the Fuel Transfer Pump on 102 D/G Would Not Fill the Day Tank, Discovery of RE18C with a Setpoint of 129 Inches Wc, and (← links)
- 05000220/LER-1978-009-01, For Nine Mile Point Unit 1 Regarding Replacement of Explosive Charges in the TIP Shear Valves with New Charges and the Resulting Unsatisfactory Ohmmeter Continuity Test for Acceptable Electric Contact (← links)
- ML17229A690 (← links)
- 05000220/LER-1980-002, Forwards LER 80-002/04L-0 (← links)