Pages that link to "NRC Form 3BBA"
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The following pages link to NRC Form 3BBA:
Displayed 50 items.
- ML18012A837 (← links)
- 05000280/LER-1989-005, :on 890204,auto Start of Emergency Diesel Generators 1 & 3 Occurred Upon Loss of Transfer Bus F.Caused by 4,160-volt Supply Circuit Breaker Failure.Circuit Breaker Cleaned & Tested Satisfactory (← links)
- 05000280/LER-1988-042, :on 881016,w/Unit 1 in Refueling Shutdown & Unit 2 in Cold Shutdown,Process Vent High Range Effluent Monitors Declared Inoperable.Caused by Failed Flow Control Circuit Board.Preplanned Operation Verified (← links)
- 05000281/LER-1988-018-02, :on 880811,steam Generator B Channel III Steam Flow Failed to High Flow Indication.Failed Multiplier/ Divider Replaced.Affected Channels Placed in Trip Mode (← links)
- 05000255/LER-1994-004, :on 940209,ESS Pump Cooling Failed. Caused by Failure to Recognize That Ess Pumps Dependent on Seal & Bearing Cooling.Revised Plant Operating Procedures So Normal Position for CV-0913 & CV-0950 Open (← links)
- 05000255/LER-1993-003, :on 930428,unusual Event Declared & Plant Shutdown Commenced Due to Primary Coolant Sys Unidentified Leakage in Excess of Ts.Leaking CRDM Mechanical Seal Packages Repaired (← links)
- 05000400/LER-1988-035-01, :on 881221,emergency Diesel Generator Actuation Occurred Due to 1A-SA Emergency Bus Tripping.Caused by Failed Relays.Two Faulty Relays Replaced & Bench Tested.W/ (← links)
- 05000400/LER-1987-049, :on 870925,operating Main Feedwater Pump Tripped on Low Flow.Caused by High Vibration in Recirculation Piping.Valve Stem Replaced & Recirculation Valve Returned to Svc on 870925 (← links)
- 05000400/LER-1987-042, :on 870709,wrong Fuses Pulled During Process of Placing Clearance OP-87-1290 Resulting in Automatic Reactor/ Turbine Trip.Caused by Personnel Error.Operator Training Conducted Re Fuse Labeling Conventions (← links)
- 05000400/LER-1997-002, :on 970207,determined That Cold Weather Conditions Resulted in Mfiv Being Potentially Inoperable During Period 970117-20.Caused by Inadequate Design of HVAC Sys.Implemented Mods to Steam Tunnel HVAC Sys (← links)
- 05000400/LER-1997-017, :on 970612,failed to Recognize Inoperable Reactor Afd Monitor.Caused by Personnel Error.Operators Involved in Event Will Be Counseled Prior to Assuming Shift Duties (← links)
- 05000400/LER-1997-015, :on 970602,inadequate Auxiliary Feedwater Sys Flow Control Valve Surveillance Testing Deficiency Was Identified.Caused by Failure to Recognize Impact on TS 4.7.1.2.1.Readjusted AFW FCV Actuator Spring (← links)
- 05000400/LER-1997-004, :on 970304,in-plant Spent Fuel Cask Handling Activities Conducted Outside Design Basis.Caused by Lack of Understanding of Requirements.Operations Placed on Hold Pending NRC Review & Approval of Procedures (← links)
- 05000400/LER-1996-025, :on 961218,determined Missed Surveillance Test on PORV Block Valve 1RC-115.Caused by Personnel Error.Tested 1RC-115 & Counseled Personnel Involve (← links)
- 05000400/LER-1996-015, :on 960812,partial ESF Actuation of Main Steam Isolation Signal Occurred During Surveillance Testing Due to Operator Error.Sta Counseled (← links)
- 05000400/LER-1996-014, :on 891127,identified Condition of Two Charging/Safety Injection Pumps Connected to Same Emergency Electrical Bus.Caused by Failure to Follow Operating Procedures.Racked Out 6.9 Kv Breaker (← links)
- 05000400/LER-1996-002-04, :on 960508,failed to Properly Perform Tech Spec Surveillance Testing.Caused by Personnel Error.Personnel Counseled,Procedure Revised & Continued in-program Tech Spec Testing Program Review (← links)
- 05000400/LER-1995-011, :on 951105,reactor Trip/Safety Injection Occurred During Solid State Protection Sys Testing Due to Failure of Relay Contact & Unplanned ESF Actuation Occurred During Troubleshooting (← links)
- 05000400/LER-1995-014-01, :on 940424,RHR Sys Components Removed from Service as Directed During Testing,While Required for Operability.Caused by Procedure Inadequacies.Test Will Be Revised to Correct Procedure by 960215 (← links)
- 05000400/LER-1993-007-01, :on 930523,SUT to Auxiliary Bus E Supply Breaker 121 Failed to Open Automatically Due to Misaligned Mechanism Operated Cell Switch in Breaker 122.Insp of Other 6.9 Kv Breakers Performed (← links)
- 05000400/LER-1987-046, :on 870722,main Feedwater Pump B Tripped Due to Low Flow Resulting in Automatic Start of Auxiliary Feedwater Pumps.Caused by Loose Linkage on Recirculation Valve Due to Vibration.Valve Repaired.Procedures Changed (← links)
- 05000400/LER-1987-045, :on 870716,RCS Pressure Fell Below Accumulator Pressure,Initiating Partial Injection of All Three Accumulators.Caused by Reactor Operator Error.Operating Shift Disciplined & Procedure Revised (← links)
- 05000250/LER-1989-012, :on 890707,discovered Liquid Scintilation Counter W/Internal Calibr Source Not Leak Tested Per Tech Specs.Caused by Inadequate Administrative Control. Administrative Procedure Issued on 890630 (← links)
- 05000250/LER-1987-010, :on 870306,reactor Manually Tripped Due to Loss of Turbine Load.Caused by dirt-induced Grooves in Stub Shaft of Control Oil Sys.Turbine Control,Lube & Seal Oil Piping Will Be Replaced (← links)
- 05000251/LER-1988-008-01, :on 880815,Phase a of Containment Isolation Train a Actuated.Caused by Wire Bundle Bouncing Contacts of Relay 4-SIA2.Actuation Signal Reset (← links)
- 05000251/LER-1987-018-01, :on 870712,operation in Excess of 24 H W/Greater than 2% Calculated Quadrant Power Tilt Ratio W/O Running Flux Map or Reducing Overpressure,Overtemp Occurred. Caused by Personnel Error.Personnel Counseled (← links)
- 05000316/LER-1990-006, :on 900625,failure of Facility Main Steam Safety Valves to Meet Tech Spec Lift Setpoint Requirements. Caused by Incompatibility of Required Setpoint Tolerance & Repeatability.Tech Spec Change Requested (← links)
- 05000316/LER-1989-014, :on 890814,reactor Protection Sys Actuation Occurred Due to Failure of Class 1E Power Supply Inverter. Caused by Failed Silicon Controlled Rectifier in Static Transfer Switch.Inverter Repaired (← links)
- 05000315/LER-1989-004, :on 890324,leakage Found on Containment Penetrations Exceeded Tech Spec 3.6.1.2.b Requirement.Caused by Excessive Leakage Rate of Valves WCR-924,ECR-26 & ECR-31. Faulty Valves Repaired & Restested (← links)
- 05000315/LER-1988-007-01, :on 880908,flow Passage Insp of Ice Condenser Revealed Frost & Ice Buildup.Caused by Sublimation of Ice or High Humidity in Containment Air.Flow Passages Manually Cleaned to Remove Accessible Frost (← links)
- 05000315/LER-1988-006-01, :on 880803,isolation of CO2 Fire Protection Sys,W/O Compensatory Action Occurred.Caused by Personnel Error.Appropriate Administrative Action Taken W/Individuals Involved (← links)
- 05000315/LER-1988-005, :on 880705,two CO2 Protected Areas Isolated W/O Compensatory Action Required Per Tech Specs.Caused by Personnel Error/Procedural Noncompliance.Administrative Actions Re Involved Individuals Taken (← links)
- 05000315/LER-1988-002-01, :on 880326,ice Buildup in Ice Condenser Flow Passages Declared Inoperable.Caused by Sublimation of Ice or High Humidity in Containment Air.Flow Passages Manually Cleaned to Remove Frost (← links)
- 05000316/LER-1987-007-01, :on 870714,ESF Reactor Trip Occurred Due to Undervoltage of Reactor Coolant Buses.Caused by Failure of Main Generator Voltage Control Sys.Failed & Suspected Components of Sys Replaced (← links)
- 05000316/LER-1987-004-01, :on 870601,turbine Trip/Reactor Trip Occurred Due to Loss of Main Condenser Vacuum.Caused by Failure of Manual Isolation Valve.Procedures Implemented to Verify Proper Response of Automatic Protection Sys (← links)
- ML17313B170 (← links)
- 05000528/LER-1999-001-02, :on 990310,RT on High Pressurizer Pressure Was Noted.Caused by Loss of Heat Removal.Cr Supervisor Was Removed from Shift Duties for Diagnostics Skills Training. with (← links)
- 05000528/LER-1996-008, :on 960507,inadequate Procedure Results in Nuclear Power Channels Not Calibrated During Power Ascension Tests Occurred.Caused by Deficient Procedure.Procedure Revised (← links)
- 05000335/LER-1997-011, :on 971102,non-conservative RAS Set Point Resulted in Operation Prohibited by Ts.Caused by Inadequate Set Point & Instrument Loop Scaling Process.Revised ESFAS Functional Tp W/Proper Set Point (← links)
- 05000528/LER-1991-004, :on 910320,supply Breaker Between non-Class IE 13.8 Kv Switchgear Buses Opened,Resulting in Loss of Power to Train a Class 1E 4.16 Kv Bus.Caused by Personnel Error. Preventive Maint Suspended (← links)
- 05000528/LER-1990-001-01, :on 900209,fuel Bldg Exhaust Ventilation high- Range Radiation Monitor Energized,Causing low-range Radiation Monitor to Spike & ESF Actuation.Caused by Noise in Circuit of Monitors.Channel B Bypassed (← links)
- 05000397/LER-1988-037, :on 881130,plant Shutdown Initiated Due to Containment Supply Purge Valve Air Vol Leak Exceeding Tech Spec Limits.Caused by Damaged CSP-V-9 Rubber Seat.Damaged Seat Replaced W/New Seat Matl (← links)
- 05000397/LER-1989-036, :on 890905,discovered That Present Surveillance Procedures Do Not Provide for Independent Measurement of Two Values.Caused by Less than Adequate Surveillance Procedures on Response Time Testing of APRM Sys (← links)
- 05000397/LER-1988-030, :on 880825 & 26,full Reactor Protection Sys (RPS) Actuations Occurred.Caused by Switch Overtravel.Rps Power Supply Select Switch Returned to Normal Position & Scram Reset (← links)
- 05000244/LER-1998-002, :on 971019,CR Emergency Air Treatment Sys Actuating Function Was Not Operable.Caused by Mispositioned Switch.Revised Procedure CPI-MON-R37 (← links)
- 05000335/LER-1999-004-01, :on 990912,noted That MSSV Surveillance Was Outside of TS Requirements.Caused by Setpoint Drift.Subject MSSVs Are Being Refurbished & Retested Prior to Unit Startup from SL1-16 Refueling Outage.With (← links)
- 05000389/LER-1999-007, :on 990610,unplanned Cooldown Transient Occurred Due to Personnel Error.Trained & Briefed Personnel & Revised Procedures.With (← links)
- 05000389/LER-1999-003, :on 990406,ECCS Suction Header Leak Resulted in Both ECCS Trains Being Inoperable & Entry Into TS 3.0.3. Caused by Chloride Induced OD Stress Corrosion Cracking of Piping.Made Code Repairs & Coated Piping.With (← links)
- 05000389/LER-1999-002, :on 990311,SG ECT Error Caused Operation with Condition Prohibited by Ts.Caused by Deficiencies in Data Analysis Guideline Instructions.Licensee Will Change Data Analysis Guidelines for Lead Analysts.With (← links)
- 05000335/LER-1999-001-01, :on 990309,discovered Inadequate Design & IST SRs for Iodine Removal Sys (Irs).Caused by Original Design Inadequacies & Personnel Error.Naoh Tank Vent Valve V07233 Was Tagged Open.With (← links)