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List of results

• ML13331A277  + (ML13331A277)
• 05000206/LER-1988-006, :on 880321,determined That Portions of Backup Nitrogen Sys Design Basis Not Fully Implemented in Design & Installation of Sys.Caused by Procedures Badly Supporting Design Requirements.Procedures Revised  + (ML13331A279)
• 05000206/LER-1988-009, :on 880526,potential Diesel Loads in Excess of Regulatory Commitments.Caused by Calculation Errors & Inadequate Understanding of Loads on Diesel Generator. Personnel Trained in Proper Methodology  + (ML13331A280)
• ML13331A281  + (ML13331A281)
• ML13331A282  + (ML13331A282)
• PNO-V-88-062, on 881119,earthquake Occurred 30 Miles West of San Clemente,Ca.Earthquake Felt by Personnel in Unit 1 Control Room & No Seismic Instrumentation Alarms Received. Licensee Found No Damage After Visual Insp of Unit 1  + (ML13331A283)
• 05000206/LER-1988-008-01, :on 880524,inadvertent Omission of Safety Injection Vent Valves from Local Leak Rate Testing Program. Caused by Valves Associated W/Penetration E15 Omitted from Local Leak Rate Testing Program  + (ML13331A284)
• ML13331A285  + (ML13331A285)
• 05000206/LER-1987-017, :on 871201,remotely Operated,Normally Closed, Containment Isolation Valves in Vent Line Did Not Close Upon Demand Upon Completion of Venting of Loop B Header.Seats of Valves Found Worn & Warped.Valves Replaced  + (ML13331A286)
• 05000206/LER-1988-004-01, :on 880215,bonnet Bleed Off Solenoid Valve SV-3900,for Safety Injection Isolation Valve HV-851B,failed to Open.Caused by Crack in Sleeve in Which Valve Disc Moves on Opening  + (ML13331A287)
• ML13331A288  + (ML13331A288)
• 05000206/LER-1988-015-01, :on 881114,performance of Local Leakage Rate Tests (LLRT) on 880720 at Below Required Pressure Discovered.Caused by Cognitive Personnel Error.Assessment of LLRT Procedure Will Be Performed  + (ML13331A290)
• 05000206/LER-1988-016-01, :on 881130,determined That Wiring Discrepancy, Associated W/South Refueling Water Pump,Could Adversely Affect Containment Spray Function.Caused by Not Removing Wire During Circuit Mods.Wire Removed  + (ML13331A292)
• ML13331A293  + (ML13331A293)
• ML13331A295  + (ML13331A295)
• ML13331A297  + (ML13331A297)
• 05000206/LER-1988-017-01, :on 881202,discovered That Calculation Which Provides Basis for Min Tech Spec Vol Did Not Account for Pump G10S Bearing Cooling Water Flow.Caused by Personnel Error.Training Program Initiated  + (ML13331A301)
• ML13331A302  + (ML13331A302)
• 05000206/LER-1988-020-01, :on 881208,failure to Fully Implement Design Requirements of NUREG-0737 in Design of Steam Generator wide-range Level Indication Sys Occurred.Cause Under Inquiry.Corrective Actions Will Be Implemented  + (ML13331A303)
• 05000206/LER-1988-021-01, :on 881212 & 13,containment Fire Protection Spray Inoperable Due to Plugged Nozzles.Caused by Piping Corrosion.Air Will Be Blown to Ensure Corrosion Products or Blockage Completely Removed  + (ML13331A304)
• 05000206/LER-1988-018-01, :on 881212,structural Integrity of Steam Generator Sleeved Tubes Not in Accordance W/Design Requirements.Caused by Limitations of Eddy Current Test Technology Due to Misinterpretation of Data  + (ML13331A305)
• 05000206/LER-1988-019-01, :on 881213,determined That Design Deficiencies Existed in Automatic Controls for Electrical Power Distribution Sys.Caused by Placing Excessive Reliance on Contractors.Training Program Initiated  + (ML13331A306)
• PNO-V-89-008, on 890118,magnitude 5 Earthquake Occurred 8 Miles South of Malibu,Ca.Earthquake Felt at Atomics Intl Facility But Not at Other Facilities  + (ML13331A307)
• 05000206/LER-1989-001, :on 890108,reactor Vessel Thermal Shield Support Block Bolts Out of Tolerance.Caused by Support Sys Degradation.Monitoring Program Is Being Developed to Detect Changes in Thermal Vibration  + (ML13331A308)
• 05000206/LER-1989-002-01, :on 890123,positive Reactivity Addition Occurred When Reactor Refueling Water Cavity Level Reduced & Cavity Surfaces Decontaminated.Caused by Misapplication of Positive Reactivity Guidance.Event Reviewed  + (ML13331A309)

• ML13331A311  + (ML13331A311)

• ML13331A312  + (ML13331A312)
• ML13331A313  + (ML13331A313)
• ML13331A314  + (ML13331A314)
• 05000206/LER-1989-005-01, :on 890220 & 0317,emergency Diesel Generator 2 Automatically Started.Caused by Loss of Bus Signal from Sequencer 2.All Components & Wiring Associated W/Possible Root Causes Candidates Replaced & Tested  + (ML13331A316)
• 05000206/LER-1989-007, :on 890227,evaluation Determined That Design Provisions Intended to Trip Reactor in Event of Reactor Coolant Pump Locked Rotor Did Not Satisfy Single Failure Criterion.Caused by Absence of Documentation  + (ML13331A317)
• PNO-V-89-020, on 890329,33 Gpm Leak Identified from Seal Package for Reactor Coolant Oil Lift Pump A,Jogging Pump & Raising RCS Pressure.Rcs Pressure Lowered to Atmospheric Pressure.Methods for Correcting Problem Under Review  + (ML13331A318)
• 05000206/LER-1989-004-01, :on 890302,identified Design Deficiency Associated W/Automatic Energization of safety-related 4 Kv Buses.Caused by Deficiencies W/Engineering Review & Design Basis Documentation.Training Program Initiated  + (ML13331A319)
• 05000206/LER-1989-008, :on 890303,determined That Possibility Exists That Containment Fire Suppression Sys Pneumatic Control Valve CV-92 Could Fail Open Due to Single Spurious Failure of Solenoid Valve.Training Program Initiated  + (ML13331A320)
• PNO-V-89-023, on 890407,magnitude 4.6 Earthquake Occurred Near Newport Beach,Ca.Telephone Contact W/Univ of California Established That Reactor Shutdown Prior to Earthquake.Util Reported No Damage to Facility  + (ML13331A321)
• 05000206/LER-1989-013, :on 890404,discovered That Inservice Testing Program for Valves Did Not Include Open Response Time for Two RCS Porvs.Caused by Failure to Recognize Impact of Tech Spec Change.Porvs Included in Program  + (ML13331A324)
• PNO-V-89-029, on 890517,startup Aborted Due to Unstable Intermediate Range Indications.Caused by Apparent Electronic Noise.Unit Remains in Mode 3,with Addl Troubleshooting of Nuclear Instrument Sys in Progress  + (ML13331A326)
• PNO-V-89-032, on 890525,auxiliary Feedwater Sys Actuation Occurred.Caused by Low Level Indication on Wide Range Instruments Modified as Part of Auxiliary Feedwater Sys Upgrades During Last Outage  + (ML13331A327)
• ML13331A328  + (ML13331A328)
• 05000206/LER-1989-017, :on 890503,reactor Protection Sys Actuation Occurred While Withdrawing Control Bank II (Cbii).Caused by Spikes Generated by Sources Associated W/Cbii Due to Stored Energy Dissipation.Circuit Mods Installed  + (ML13331A329)
• ML13331A330  + (ML13331A330)
• ML13331A331  + (ML13331A331)
• ML13331A332  + (ML13331A332)
• 05000206/LER-1989-012, :on 890525,auxiliary Feedwater Sys Train a Actuation Occurred When wide-range Steam Generator Level Signals Decreased Below Actuation Setpoint.Caused by Effects of Internal Circulation Flow  + (ML13331A333)
• ML13331A334  + (ML13331A334)
• PNO-V-89-040, on 890703,shutdown for Greater than 48 H Occurred to Troubleshoot Reactor Coolant Pump Bearing Oil Problem.Oil Not Contaminated W/Metal or Water  + (ML13331A335)
• 05000206/LER-1989-014, :on 890405,determined That Unlimited Operation of Dc Buses on cross-train Chargers Unwarranted Condition. Caused by Failure to Develop Appropriate Tech Specs.Design Change Re Train Alignment Completed  + (ML13331A336)
• 05000206/LER-1989-016, :on 890703,air Flow Test of Lube Oil Reservoir & Conditioner Fire Protection Sys Revealed That Approx 20 of 78 Nozzles Plugged.Caused by Accumulation of Piping Corrosion Matl Inside Fire Spray Header  + (ML13331A337)
• 05000206/LER-1989-019, :on 890724,unit Manually Tripped Due to Loss of Feedwater Flow to Steam Generator a & Hi Hi Level & Steam/ Feed Mismatch Alarm Received.Caused by Error in Incorporating Design Change Info  + (ML13331A338)
• 05000206/LER-1989-020, :on 890723,both Fuse Blocks for Emergency Siren Transfer Switch Installed in Violation of Tech Specs. Caused by Failure to Document Manipulation of safety-related Equipment.Sign Installed on Fuse Blocks  + (ML13331A339)
• 05000206/LER-1989-001-01, :on 890108,observed That Reactor Vessel Thermal Shield Support Block Bolts Out of Tolerance.Caused by high-cycle Flow Induced Vibration.Conceptual Design & Plan for Restoring Thermal Shield Support Initiated  + (ML13331A342)