Pages that link to "NRC Form 355A"
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The following pages link to NRC Form 355A:
Displayed 50 items.
- 05000424/LER-1989-017-01, :on 890728,radiation Monitor ARE-2532B High Alarm Setpoint Resulted in Fuel Handling Bldg Isolation. Cause Unknown.Alarm Setpoint Raised & Procedure 35611-C Revised Re Panel Operating Steps (← links)
- 05000259/LER-1997-001-03, :on 970203,potential Overpressurization Containment Penetration Pipe Occurred Due to Thermal Expansion of Entrapped Water Was Identified.Plant Procedures Will Be Revised (← links)
- 05000352/LER-1985-011, :on 850116,fuse Supplying Power to Outboard Isolation Logic Relays in Nuclear Steam Supply Shutoff Sys Blew,Resulting in Isolation of Reactor Encl HVAC Sys.Caused by Electrical Short.Fuse Replaced (← links)
- 05000280/LER-1989-004, :on 890215,determined That Cable Tray Covers Did Not Comply W/App R Commitments Since Min Cable Separation Did Not Meet Reg Guide 1.75 Requirements.Caused by Improper Installation & Reinstallation (← 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)
- 05000220/LER-1990-006-01, :on 891027,discovered Unverified Assumption in App R Safe Shutdown Analysis.Caused by Fire Protection Program Failure to Provide Detailed Procedural Instructions for Operator Actions.New Procedures Developed (← links)
- 05000296/LER-1988-005-04, :on 881108,loss of Power to 4160 Volt Shutdown Board Due to Inadequate Breaker Alignment Causes ESF Actuations.Breaker Reinstalled & Properly Racked Into Normal Position (← links)
- 05000400/LER-1992-012-02, :on 920802,one of Three Secondary Relays Failed to Actuate,Causing TS 3.0.3 to Be Entered.Caused by Failure of under-voltage Relay to Actuate.Procedure Will Be Revised to Provide Guidance for Tripped Condition (← links)
- 05000400/LER-1990-022-01, :on 901108,missed Surveillance Test for Secondary Waste Sample Tank Due to Incorrect Procedure Rev (← links)
- 05000400/LER-1990-019-01, :on 900824,potential Loss of RHR Sys Noted Due to Loss of Ccw.Caused by Sys Design (← links)
- 05000400/LER-1990-014, :on 900516,discovered That Two Liquid Radioactive Releases Initiated on 900513 Were in Excess of Flow Rate Specified on Release Permits.Caused by Personnel Error.Max Release Rate Must Be Recorded (← links)
- 05000400/LER-1990-011, :on 900405,Tech Spec Violation Occurred Due to Missed Tests on Valve.Caused by Procedural Deficiencies. Procedures Revised & Plant Personnel Trained (← links)
- 05000400/LER-1990-008, :on 900314,discrepancy in Amperage Rating of Circuit Breaker Providing Overcurrent Protection for Containment Penetration Conductor Discovered.Caused by Use of Oversized Breaker.Breaker Upsized (← links)
- 05000400/LER-1989-021-02, :on 891227,ESFAS Actuation Occurred Due to Loss of Main Feedwater Pump.Caused by Personnel Error.Sampling Valve Repaired,Appropriate Procedure Revised & Applicable Personnel Trained on low-flow Trips (← links)
- 05000400/LER-1989-015-01, :on 890827,discovered That Fuel Handling Bldg Operating Floor Equipment Hatch in Storage Location on Operating Deck Not Installed as Required.Caused by Inadequate Procedure.Procedure Revised (← links)
- 05000400/LER-1989-001, :on 890116,w/plant in Mode 1,reduction of Turbine Load Ensued & Turbine Trip Occurred Due to Low Condenser Vacuum Resulting in Automatic Reactor Trip.Caused by Personnel Error.Personnel Counselled (← links)
- 05000400/LER-1989-004, :on 890207,loss of All Three Circulating Water Pumps Resulted in Loss of All Flow to Main Condenser, Causing Reactor Trip.Caused by Air Entering Circulating Water Pump Seal Water Sys.Components Repaired (← links)
- 05000400/LER-1988-027, :on 880907,chemistry Technicians Failed to Obtain Gas Grab Sample at Required Time.Specific Technician Designated to Perform Compensatory Sampling Until All Compensatory Surveillance Requirements Met (← links)
- 05000400/LER-1988-029, :on 880915,short Equipment Start Pulses Generated,Causing Safety injection,motor-driven Auxiliary Feedwater & Emergency Svc Water Pumps to Start.Caused by Failure of Relay in Sequencer Test Circuit (← links)
- 05000400/LER-1987-039, :on 870619,intermediate Range (IR) High Neutron Flux Trip Setpoint Found Out of Calibr.Caused by Previous Adjustment to IR Setpoints.New Scaling Currents for 25% Trip Incorporated Into Applicable Procedures (← links)
- 05000250/LER-1990-021, :on 901018,determined That Length of Time CCW Headers Split for Movement of Heavy Loads Exceeded Appropriate Action Statement Time Limit That Should Have Been Imposed (← links)
- 05000251/LER-1990-007-02, :on 900726,component Cooling Water Pump 4A Automatically Started.Caused by Error Made by Nonlicensed Personnel.Pressure Controller PC-4-611 Recalibrated (← links)
- 05000250/LER-1987-030, :on 871027,determined That Existing Min Recirculation Design Configuration for RHR Sys Potentially Inadequate.Recirculation Flow Path for RHR Pumps Original Design of Plant.Mods Developed (← links)
- 05000250/LER-1987-016, :on 870526,while in Mode 6,partial Actuation of Train a Safeguards Equipment Occurred.Caused by Sticking Safety Injection Block Switch.Switch Inspected,Cleaned & Returned to Svc (← links)
- 05000250/LER-1987-015, :on 870522,design Basis Reconstitution Revealed Potential Loss of HVAC in Inverter & Battery Rooms.Caused by Mods to Original Plant Design.Maint & Insp Procedures Implemented for Air Conditioning Units (← links)
- 05000250/LER-1987-014, :on 870519,while Unit in Mode 6,determined That Design Discrepancy Existed in Containment Spray Sys.Caused by Flow Orifice in Discharge Line Not Incorporated in Field. Design Mods Will Be Implemented for Correction (← links)
- 05000250/LER-1989-007, :on 890316,surveillance for Snubber Missed. Caused by Weakness in Snubber Testing Program.Snubber Removed & Functionally Tested & Replaced W/Spare Snubber.W/ (← links)
- 05000250/LER-1988-003, :on 880308,containment Ventilation & Control Room Ventilation Isolation Occurred.Caused by Minor Electrical Transient Upon Failure of One Light Filament. Failed Dual Filament Bulb Replaced (← links)
- 05000251/LER-1987-024-01, :on 871008,temp for Boric Acid Heat Tracing Circuit Number 6 Decreased Below 145 F.Caused by Cold Flushing of Crosstie Line.Flushing of Boric Acid Pump Crosstie Line Stopped & Sys Alignment Restored (← links)
- 05000250/LER-1987-024, :on 870913,reactor Controls Manipulated by Nonlicensed Person Under Supervision of Licensed Operator. Caused by Personnel Error.Personnel Counseled (← links)
- 05000316/LER-1988-001, :on 880106,Tech Spec 3.3.3.10 Discovered Not Met for 871230-880106 Due to Discovery of Incorrect Lineup for Radiation Monitor VRS-2500.Caused by Personnel Error. Flow Restored to Monitor & Lineup Verified (← links)
- 05000315/LER-1995-007, :on 950825,Conax Seal Assemblies on Rv Post- Accident Vent SVs 1-NSO-21 & 1-NSO-23 Found Loose.Missing Ferrules for 1-NSO-21 & 1-NSO-23 Replaced.Determined Event Not Reportable & LER 95-007-00 Cancelled (← links)
- 05000316/LER-1995-005-01, :on 950829,RT Occurred on High Negative Rate Resulted from Trip of Both CRD-MG Sets Due to mis-adjusted Voltage Regulators.Replaced CRD-MG Common Bus Overvoltage Relay Body (← links)
- 05000316/LER-1994-006-01, :on 940906,six MSSVs Failed to Meet TS Lift Setpoint Requirements.Caused by Galling Between Valve Disk & Nozzle.Nrr Issued TS Amend 167 to Unit 2 Ts,Increasing MSSV Tolerance on 940909 (← links)
- 05000315/LER-1994-003, :on 940311,main Steam Safety Valve Test Inaccuracy Due to Miscalculation of Valve Seat Area by Vendor.Mssvs Retested After Entering Mode 3 (← 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)
- 05000316/LER-1993-003, :on 921016,discovered That Charcoal Filter Face Dampers Were Closed Instead of Open as Indicated.Caused by Incorrect Solenoid Installation.Procedures Revised & Dampers Verified to Be Installed Correctly (← links)
- 05000315/LER-1992-012, :on 921028,Turbine Trip/Reactor Trip Occurred During Power Increase to 30% to Perform Routine Calometric Test.Caused by Failure to Reset Thrust Bearing Wear Detector Setpoint.Procedures to Be Drafted (← links)
- 05000316/LER-1992-007-01, :on 920702,reactor Tripped from Turbine Trip Coincident W/Turbine Power Greater than 10%.Caused by Sudden Loss of Main Condenser Vacuum During Diagnostic Testing. Procedure Enhancements Made (← links)
- 05000315/LER-1992-006-02, :on 920618 & 19,10 of 20 Main Steam Safety Valve Lift Settings Found Outside of TS Tolerances.Caused by Setpoint Drift.Valves Reset to Acceptable Values & Retested Satisfactorily (← 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)
- 05000316/LER-1991-002-01, :on 910220,discovered That Previous Procedure Rev Omitted Fire Damper from Insp List & Damper Not Included in Surveillance.Cause Not Conclusively Determined.Damper Visually & Functionally Inspected (← links)
- 05000315/LER-1990-008, :on 900619,discovered That Isolation Relay Circuitry for Low Header Pressure Auto Start Switch for Essential Svc Water Pumps Installed Incorrectly.Caused by Design Errors.Plant Mod Packet Initiated (← links)
- 05000316/LER-1990-002, :on 900108,two MSIVs Exhibited Closing Time in Excess of Tech Spec 3.7.1.5 Limit of 5 S.On 900109 & 10, Confirmed That Excessive Condensation Collected on Vent Side.Caused by Inadequate Insulation (← links)
- 05000315/LER-1990-004-01, :on 900508,reactor Operator Inadvertently Started Containment Recirculation Fan Instead of Hydrogen Recombiner During Surveillance Test.Caused by Inadequate Work Practice.Condenser Restored (← links)
- 05000315/LER-1989-001-01, :on 890116,erroneous Operation of Control Switch for Condenser Air Off Takes to Startup Air Ejectors Occurred.Caused by Inadequate self-checking.Switches Labeled & Operator Training Emphasis Made (← links)
- 05000528/LER-1998-001, :on 980130,reactor Protection & ESFAS Instrumentation Not Bypassed within one-hour Allowed by TS Occurred.Caused by Inadequate Procedures.Expectation to Detect Alarm Conditions Was Emphasized to CR Personnel (← links)
- 05000528/LER-1996-002-02, :on 960514,Tech Spec Violation Occurred Due to Erroneous Surveillance Requirement.Caused by Incorporation of C-E Generic Ts.Investigation Being Conducted (← 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-1991-003, :on 910208,determined That Essential Spray Pond cross-connect Valves Not Verified in Correct Position. Caused by Failure to Meet TS Surveillance Requirements. Valve Positions Verified & Valves Locked Shut (← links)