Pages that link to "NRC Form 356A"
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The following pages link to NRC Form 356A:
Displayed 50 items.
- 05000416/LER-1985-015, :on 850404,RCIC Sys Inadvertently Isolated When Bypass Switch Mistakenly Returned to Normal During Testing.Caused by Misunderstanding Between Personnel.Sys Restored.Need for Clear Communication Stressed (← links)
- 05000327/LER-1985-015, :on 850404,hourly Fire Watch for Auxiliary Bldg Supply Air Fan Room Not Conducted.Caused by Inoperable Door. Door repaired,post-maint Check Made & Fire Watch Reestablished (← links)
- 05000277/LER-1992-018, :on 920915,security Personnel Discovered That TS Required 1 H Firewatch Performed in Excess of 1 H Interval.Caused by Personnel Error.Security Supervisor Counselled (← links)
- 05000352/LER-1996-013, :on 960521,Unit 1 Reactor Scram Occurred.Caused by Inadequate Procedural Guidance & Undetermined Equipment Malfunction.Procedure Will Be Revised to Ensure Appropriate Barriers,In Place to Minimize Risk of Scram (← links)
- 05000413/LER-1985-019, :on 850307,during Performance of Analog Channel Operational Test,Steam Generator C Level Channel 4 Found Inoperable.Caused by Personnel Error.Circuit Card Replaced (← links)
- 05000293/LER-1992-005, :on 920403,actuation of CSCS Logic Circuitry Occurred While Shut Down.Caused by Procedure Deficiency. Procedure Tp 92-020,Rev 0 Retired & Replaced by Procedure Tp 92-022,Rev 0 (← links)
- 05000352/LER-1995-008-01, :on 950911,unusual Event Declared & RPS Actuated When Reactor Manually Shutdown Due to Inadvertent Opening of Ms SRV M.Caused by Pilot Valve Seat Leakage.Srv M & Four Other SRVs Removed & Replaced (← links)
- 05000331/LER-1984-019, :on 840521,0603,05 & 06,unplanned Partial Group V Isolation Experienced.Caused by Random Noise in Circuit.Further Study to Reduce Susceptibility of Sys to Spurious Isolation Pursued (← links)
- 05000352/LER-1995-003-01, :on 950719,Unit Maximum Power Level of 100% Was Exceeded by 3.4% Due to Unanticipated Response of 1B Reactor Recirculation Pump Following Decrease Speed Signal. Established Administrative Limit of 100% Core Flow (← links)
- 05000278/LER-1991-017-02, :on 910924,Automatic Depressurization Sys Discovered Inoperable Due to Components Being Unqualified. Caused by MSRV Thermal Insulation Being Improperly Installed.Subj Insulation Properly Reinstalled (← links)
- 05000352/LER-1995-002, :on 950221,reactor Protection Systems Actuated as Result of Trips of Main Turbines.Caused by Breaker Failure & Voltage Spike.Ground Fault Detection Relay Settings Being Evaluated (← links)
- 05000414/LER-1994-007-01, :on 941018,reactor Trip Occurred & TS Violated. Caused by Document Use Practices & Less than Adequate Mgt Directions.Cr Operators Entered Appropriate Emergency Procedures & Stabilized Plant (← links)
- 05000293/LER-1994-003, :on 940427,false Low Rector Vessel Water Level Signal Occurred While Shut Down.Caused by Deficiency in Procedure Being Used for Venting & Filling.Corrective Action Included Filling & Venting Water Header (← links)
- 05000443/LER-1994-002, :on 940210,determined Method for Performing Slave Relay Test Valve Did Not Satisfy Ts.Caused by Omission of Relevent Information from Surveillance Procedures. Procedures Revised (← links)
- 05000285/LER-1994-002, :on 940308,boric Acid Pump Declared Inoperable Due to Inability to Ensure Reliable Starting of CH-4B Motor. Breaker Replaced W/Appropriate Model Breaker & Breaker for Boric Acid Pump Verified Appropriate (← links)
- 05000301/LER-1993-005-01, :on 931119,molded Case Circuit Breakers Failed Test Due to Grease Solidification.Caused by age-related Grease Solidification in MCCB Tripping Mechanism.Mccb Tested & Schedule for Replacement (← links)
- 05000293/LER-1993-001, :on 930126,high Pressure Coolant Injection Sys Declared Inoperable.Caused by Blown Power Fuse Located within Flow Controller.Blown Fuse Replaced (← links)
- 05000293/LER-1993-019, :on 930722,automatic Actuation of RHR Sys Portion of PCIS Occurred.Caused by Momentary Pressure Transient That Actuated Protective High Pressure Switches. Calibr Performed (← links)
- 05000423/LER-1993-007-01, :on 930611,plant Mgt Discovered Reduction in EDG Fuel Oil Storage Capacity Per SER & Fsar,Constituting Event Outside Design Basis of Plant.Caused by Inadequate Design Interface.Temporary Tanker Utilized (← links)
- 05000331/LER-1993-004, :on 930611,while Performing EDG Operability Surveillance,Edg a Tripped Approx 3 After Initial Start Signal.Possibly Caused by Partially Latched Condition of Trip Mechanism.Latch Will Be Reset (← links)
- 05000282/LER-1993-006, :on 930325,cooling Water Pump 121 auto-started on Low Header Pressure While Aligned for Safeguards Operation.Caused by Operator Failing to Open Header Valves a & B.Surveillance Procedures Will Be Revised (← links)
- 05000482/LER-1993-004-01, :on 930316,broken Fuel rod,11-12 Inches in Length,Protruded Out of Fuel Assembly F67 at Core Position FH-6.Caused by Grid to Rod Fretting Failures.Util Evaluating Fluid Elastic Instability (← links)
- 05000263/LER-1989-040, :on 891219,secondary Containment Failed to Meet Operability Requirements for Secondary Containment Capability.Caused by Design Deficiencies.On 930317,addl Design Deficiency Noted Re Damper Controls (← links)
- 05000282/LER-1993-003-01, :on 930204,discovered That Lower Detector Flux Signal from All Four Nis power-range Channels Outside Acceptance Criterion.Caused by Miscalibration of power-range Channels.Procedures Revised & Test Labeling Improved (← links)
- 05000280/LER-1993-006-01, :on 930513,SW Flow Path to Main CR Chillers Declared Inoperable Due to Pipe Leak.Two Inch Backwash Supply Line & Strainer 1-VS-S-1A & Associated Isolation Valves Replaced (← links)
- 05000281/LER-1992-008-03, :on 921215,RCS Leak Identified Near Low Pressure Letdown Flow Transmitter.Caused by Failure of Swagelock Fitting on Flow Transmitter.Root Cause Evaluation in Progress & Fitting & Tube Replaced (← links)
- 05000280/LER-1991-011-01, :on 910406,simulated Design Basis Accident Conditions Resulted in Failure of Pumps to Develop Design Flow & Discharge Pressure.Caused by Inadequate Design. Permanent Mod of Radiation Sys Evaluated (← links)
- 05000281/LER-1989-003-02, :on 890813,charging Pump B Automatically Started After Control Switch Disengaged from pull-to-lock Position.Caused by Operator Not Adequately Engaging Pumps Switch in Position Prior to Event (← links)
- 05000281/LER-1993-006-03, :on 931115,Unit 2 Experienced Automatic Reactor Trip.Caused by Electrical Circuit Failure.Electrical Failure Traced to Defective Circuit Breaker & Replaced (← links)
- 05000281/LER-1993-004-02, :on 930823,reactor Tripped Due to Turbine - Generator Trip.Caused by Loss of Field Relay.Reactor Trip Breakers Verified Open & Control Rods Verified Inserted Into Core (← links)
- 05000281/LER-1993-003-03, :on 930803,automatic Reactor Trip Occurred Due to Low Steam Generator Water Level Coincident W/Steam/ Feedwater Flow Mismatch Resulting from Spurious Closure of Main Feedwater Regulating Valve a (← links)
- 05000280/LER-1994-006, :on 940511,manual Reactor Trip Occurred During Safeguards Actuation Logic Testing.Caused by Inadvertent Actuation of Relay in Safety Injection Actuation Circuitry. Reactor Placed in Safe,Hot Shutdown Condition (← links)
- 05000280/LER-1994-003-01, :on 940204,hole in Recirculating Spray HX Svc Water Outlet Piping Identified.Caused by Failure of Coal Tar Epoxy Coating.Piping Inspected & Will Be Pressure Tested Per Station Procedures (← links)
- 05000280/LER-1988-005-01, :on 880219,heat Tracing Proper Control Setpoints Could Not Be Verified.Caused by Inadequate Surveillance & Maint Procedures.Verification of Correct Setpoints Initiated (← links)
- 05000280/LER-1987-027, :on 871027,electrical Short in Train a Turbine Bldg Flood Control Panel Caused Spurious Completion of Flood Protection Circuit.Caused by Leak on Access Manway of Moisture Separator Reheater 1-MS-E-1B (← links)
- 05000373/LER-2018-003, Regarding Two Main Steam Safety Relief Valves Failed Inservice Lift Inspection Pressure Test (← links)
- 05000260/LER-1998-004-03, :on 981202,SR Intent Was Not Adequately Implemented.Caused by Procedural Inadequacy.Revised Procedures to Provide Proper SR Implementation.With (← links)
- 05000296/LER-1993-001-03, :on 930228,unplanned Actuation of ESF Occurred When 3 DGs Automatically Fast Started.Caused by Inappropriate Personnel Action.Licensee Will Replace Damaged CAS Logic Cable & Will Submit Followup Rept (← links)
- 05000400/LER-1992-007-02, :on 920712,automatic Turbine Trip & Reactor Trip Occurred Due to Failure of Low Pressure Turbine Exhaust Boot Seal.Repairs to Low Pressure Turbine Exhaust Boot Seal Completed on 920713 (← links)
- 05000400/LER-1990-010, :on 900405,control of Reactor Auxiliary Bldg Emergency Exhaust Pressure Boundary Not Implemented.Caused by Lack of Administrative Controls for Doors & Hatches. Administrative Controls Implemented (← links)
- 05000400/LER-1987-030, :on 870512,Maint Surveillance Tests I0140, I0141 & I0142 for P-12 Interlock Missed Thus Violating Tech Specs Requirements.Caused by Personnel Error.Procedures Revised (← links)
- 05000251/LER-1987-007-01, :on 870310,air Leakage During Leak Rate Testing of Personnel Hatch Exceeded Tech Spec Requirements.Caused by Malfunctioning Equilizing Valve Not Being Able to Fully Close.Valve Replaced (← links)
- 05000315/LER-1994-001, :on 940203,04 & 05,13 of 20 MSSVs Lift Settings Found Out of Tolerance.Caused by Mild Galling Between Disk & Nozzle Components.Valve Mfg Recommended That Nozzle & Disc Seatingsurfaces Have Grey Matt Finish (← links)
- 05000316/LER-1993-008, :on 930827,reactor Trip Occurred from Steam Flow/Feed Flow Mismatch Coincident W/Low Level in SG 4. Defective current-to-current Repeater Replaced (← links)
- 05000315/LER-1990-010, :on 900824,discovered That Routing Cable Associated W/Unit 1 Low Shutdown Indication Panels Not in Compliance w/10CFR50,App R.Minor Plant Mod Initiated to Provide Encl (Wrapped) Around Subj Conduit (← links)
- 05000316/LER-1993-002, :on 930219,determined That Condenser Air Ejector TS Sample Had Not Been Taken.Caused by Personnel Error.Appropriate Administrative Action Taken in Regards to Individuals Lack of Attention to Detail (← links)
- 05000316/LER-1992-002-01, :on 890124,containment Isolation Valves Not Repaired When ASME Section XI Leakrate Acceptance Criteria Exceeded.Caused by Procedure Requirements Not Being Included in Test Procedure.Packing Replaced (← links)
- 05000315/LER-1991-005, :on 910718,emergency Diesels Declared Inoperable When Design Documents Could Not Be Located to Demonstrate Capability of EDG to Withstand Effects of Tornado.Edg Room Fans Will Be Run (← links)
- 05000315/LER-1991-009, :on 910927,discovered That CO2 pop-off Chain for Fire Damper Not Wired to CO2 Piping,Rendering Fire Damper Inoperable.Caused by Personnel Error.Wire Removed & Approved Clip Reattached to Chain (← links)
- 05000315/LER-1991-006, :on 901129,facility Outside Design Basis for Separation of Safety Related & Nonsafety Related Circuits. Caused by Personnel Error.Design Procedures Revised (← links)