Pages that link to "NRC Form 355A"

The following pages link to NRC Form 355A:

Displayed 40 items.

• 05000528/LER-1991-001, :on 910110.determined That Postulated Break in Reactor Coolant Pump High Pressure Seal Cooler Could Result in RCS Leak Outside Containment.Caused by Tube Rupture in Seal Cooler.Rcs Activity Monitored ‎ (← links)
• 05000528/LER-1990-001, :on 900220,radiation Monitor Indication Spike Resulted in ESF Actuation.Caused by Noise in Radiation Monitor Common Ground Circuit & Cognitive Personnel Error. Mod Performed to Circuit & Personnel Counseled ‎ (← links)
• 05000528/LER-1990-003, :on 900320,log Power Channels Declared Inoperable When Plant Protection Cabinets Deenergized for Scheduled Maint.Caused by Personnel Error.Wiring in Cabinets Reworked & Cabinets Returned to Svc ‎ (← links)
• 05000529/LER-1990-001-02, :on 900223,manual Reactor Trip Occurred During Planned Shutdown.Caused by Axial Shape Index Approaching Limit at End of Core Life Shutdown.Reactor Manually Tripped So That Channel Trip Setpoint Not Exceeded ‎ (← links)
• 05000530/LER-1990-002, :on 900222,locked High Radiation Area Gate Found Open & Unguarded.Caused by Personnel Error.Radiation Protection Personnel Verified Room Unoccupied & Secured Gate Per Approved Procedure ‎ (← links)
• 05000528/LER-1989-017, :on 891023,four Unsealed Penetrations in Unit 3 Seismic Gap Area Discovered During Visual Insp of 94 Ft Elevation Diesel Bldg Pipe Trenches.Fire Watches Established in All Units.Sealing of Penetrations Underway ‎ (← links)
• 05000530/LER-1990-001, :on 900127,spurious Train B Containment Purge Isolation Actuation Signal Initiated on Balance of Plant Esfas.Caused by Spiking of Radiation Monitor RU-38 Due to Malfunctioning Central Processing Unit ‎ (← links)
• 05000528/LER-1989-020, :on 890907,emergency Diesel Generator B, Essential Spray Pond Pump B & Essential Cooling Water Pump B Started During Removal of Jumpers.Caused by Personnel Error. Maint Procedure Revised ‎ (← links)
• 05000530/LER-1989-001, :on 890303,electrical Grid Disturbance Resulted in Main Generator Output Breakers Opening,Resulting in Reactor Power Cutback & Steam Bypass Control Sys Actuation. Caused by Malfunction in Subj Control Sys ‎ (← links)
• 05000528/LER-1989-007, :on 890412,discovered Two of Four Pressurizer Code Safety Valves Out of Tech Spec Tolerance of 2,500 Psia Plus or Minus 1%.Caused by Performance Limitation.Valves Adjusted & Retested Satisfactorily ‎ (← links)
• 05000530/LER-1989-004, :on 890104,exhaust Rocker Arm for Cylinder 8L Failed,Resulting in Emergency Diesel Generator Trip.Caused by Crack in Rocker Arm.On 890107,ESF Actuation Occurred.Also Reported Per Part 21.Rocker Arm Redesigned ‎ (← links)
• 05000528/LER-1989-019, :on 890929,Train B of Fuel Bldg Essential Ventilation Actuation Sys Spuriously Actuated.Caused by Loose Connection Between Radiation Monitor Remote Indication & Control Unit Instrument Drawer & Cabinet ‎ (← links)
• 05000530/LER-1989-013-01, :on 890926,control Room Operator Inadvertently Turned Wrong Handswitch During post-maint Testing Which Resulted in ESFAS Actuation.Caused by Personnel Error. Disciplinary Measures Taken ‎ (← links)
• 05000530/LER-1989-005-01, :on 890628,sample Flow Rate for Vent low-range Radioactive Effluent Monitor Below Low Flow Alarm Setpoint, Rendering Monitor Inoperable.Caused by Loose Set Screw on Coupling.Set Screw on Sample Pump Tightened ‎ (← links)
• 05000528/LER-1988-005, :on 880123,backhoe Operator Inadvertently Damaged Post Indication Valve (Piv)(Kp)(Isv) & Caused Fire Suppression Water to Discharge Into Protected Area.Caused by Inadequate Procedure.Procedures Implemented ‎ (← links)
• 05000528/LER-1987-009-01, :on 870604,inadvertent Control Room Essential Filtration Actuation Occurred Due to Radiation Monitor Pump Cycling.Caused by Motor Drawing Too Much Current.Ground to Motor & Radiation Monitor Separated ‎ (← links)
• 05000397/LER-1994-004, :on 940307,two in-series Containment Isolation Valves MS-V-16 & MS-V-19 Inoperable Since 931217.Caused by Ambiguous Wording in Dec 1993 Operability Assessment. Procedures Modified & Training Provided ‎ (← links)
• 05000397/LER-1991-013, :on 910507,non-compliances W/Tech Specs Identified as Part of Program of Surveillance Procedure Verification.Further Evaluation Performed.Quality Action Team to Be Chartered to Evaluate Program ‎ (← links)
• 05000397/LER-1990-022, :on 900930,pressure Decrease Occurred in Containment Instrument Air Sys When Nitrogen Cryogenic Tank Was Inadvertently Depleted.Containment Nitrogen Inerting Procedures PPM 2.3.1 & 2.3.7 Revised ‎ (← links)
• 05000397/LER-1990-026, :on 901024,inadequate Electrical Power Supply Separation Discovered in Two Control Room Panels Due to Design Error ‎ (← links)
• 05000397/LER-1989-033, :on 890811,RWCU Isolation Occurred When Fuse in Power Supply to Leak Detection Monitor Blew,Giving False High Alarm Signal to Isolation Logic.Cause Unknown.Fuse Replaced & RWCU Sys Restored to Operation ‎ (← 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-1989-020, :on 890527 & 0605,during Local Leak Rate Testing,Valve RHR-V-9 Automatically Isolated.Caused by Procedural Inadequacy & Inadequate Corrective Action Following Second Event.Procedure Modified ‎ (← links)
• 05000397/LER-1989-005, :on 890311,34 of 185 Control Rods Drifted Inward from One to Seven Notches.Caused by Main Steam Line Radiation Monitor Design Deficiency.Desired Rod Pattern Reestablished ‎ (← links)
• 05000397/LER-1989-015, :on 890512,three-quarter-inch High Point Vent Line Failed During Performance of HPCS Sys Operability Procedure.Caused by Reverse Bending Fatigue Caused by Vibration.Design Change Implemented ‎ (← links)
• 05000397/LER-1988-023, :on 880629,Tech Spec Violation of Secondary Containment to Outside Differential Pressure Occurred.Caused by Sys Configuration Error.Instrument Setpoint Change Request Initiated ‎ (← links)
• 05000397/LER-1988-017, :on 880615,problems W/Limitorque Models SMB-000 & SMB-00 Discovered W/Potential Defective Switches.Caused by Design Problem.Investigation & Evaluation of Switch Problems Immediately Initiated.Part 21 Related ‎ (← links)
• 05000397/LER-1987-018, :on 870626,reactor Automatically Scrammed by Reactor Protection Sys Actuation Due to Normal Auxiliary Power Transformer Sudden Pressure Relay Actuation.Caused by Opening of Test Valve.Transformers Inspected ‎ (← links)
• 05000397/LER-1987-005, :on 870421,reactor Containment Inboard RHR Shutdown Cooling Supply Valve Automatically Isolated.Caused by Personnel Error.Lifted Neutral Lead Replaced.Relay RHR-V-9 Reopened & Plant Engineer Counseled ‎ (← links)
• 05000244/LER-1999-009, :on 990503,instrumentation Declared Inoperable in Multiple Channels Resulted in Condition Prohibited by Ts. Caused by Unanticipated High Frequency AC Voltage Ripple. Entered TS LCO 3.0.3.With ‎ (← links)
• 05000244/LER-1992-005, :on 920420,determined That 242 Tubes in a SG & 216 Tubes in B SG Required Corrective Action Due to Tube Degradation.Affected Tubes Either Sleeved or Plugged.W/ ‎ (← links)
• 05000388/LER-1991-009, :on 910624,RWCU Steam Leak Detection Instrumentation Discovered to Be Inadvertently Actuated During Routine Functional Testing.Caused by Adequate Verbal Communication.Technicians Briefed ‎ (← links)
• 05000335/LER-1987-014-02, :on 871008,unidentified RCS Leakage Greater than Tech Spec Limit Discovered.Caused by Weld Joint Failure Due to Previous Misalignment of Listed Flanges.Reactor Shut Down & Required Repairs Performed ‎ (← links)
• 05000389/LER-1987-005-03, :on 870527,while Operating in Mode 1,control Element Assemblies 5 & 7 Simultaneously Dropped to Bottom of of Core.Possibly Caused by Random Intermittent Failure of Control Element Drive Mechanism Component ‎ (← links)
• 05000389/LER-1987-003-03, :on 870409,during Troubleshooting,Jumper Placed on Wrong Terminal of Main Steam Isolation Signal (MSIS) Actuation Pushbutton Circuitry,Causing Actuation of Msis. Caused by Cognitive Personnel Error ‎ (← links)
• 05000335/LER-1987-009-01, :on 870412,ECCS Emergency Exhaust Fan Radiation Monitor Failed Resulting in Inoperability of Fuel Handling Bldg Exhaust Stack Radiation Monitor.Caused by Equipment & Personnel Error.Monitors Restored to Svc ‎ (← links)
• 05000335/LER-1987-006-02, :on 870322,spurious Main Steam Isolation Occurred When Energized Wires Inadvertently Allowed to Make Contact W/Metal Cabinet.Caused by Personnel Error.Personnel Instructed on Working W/Energized ESFAS ‎ (← links)
• 05000458/LER-2014-003-01, Regarding Operations Prohibited by Technical Specifications Due to Concurrent Inoperability of Reactor Protection System Channels ‎ (← links)
• 05000321/LER-2009-006, Regarding Main Control Room Air Conditioner Inoperable Due to Inoperable Solenid Valve ‎ (← links)
• 05000454/LER-2007-002, Technical Specification Required Shutdown of Unit 1 and Unit 2 Due to an Ultimate Heat Sink Pipe Leak Common to Both Units ‎ (← links)