ST-HL-AE-3947, Monthly Operating Repts for Nov 1991 for South Texas Project Units 1 & 2
05000293/LER-1989-025, :on 890805,HPCI Sys Declared Inoperable & 7-day Tech Spec Limiting Condition for Operation Entered.Caused by Failure of Gland Seal Condenser Blower Motor to Start.Blower Motor Brushes Replaced & Blower Tested
05000277/LER-1989-008-01, :on 890415,incorrect Undervoltage Trip Fuses Placement by Operator Occurred Due to Inadequacy of Training Resulting in Isolation of RWCU Sys.Caused by Administrative Deficiency.Training Ltr Will Be Issued
05000327/LER-1989-012-01, :on 890410,containment Ventilation Isolation Occurred Due to Spurious High Radiation Spike on Noble Gas Channel of Lower Containment Radiation Monitor.Investigation of Incident to Be Completed by 890531
05000321/LER-1989-008-02, :on 890608,determined That Tech Specs for Onsite Emergency Diesel Generator Fuel Did Not Require That Adequate Fuel Inventory Be Maintained Onsite for 7 Days Under Accident Conditions
05000369/LER-1989-013-02, :on 890630,flow Indication for Steam Generator C Failed High & on 890705,alarm for 3% Deviation Received During Power Escalation.Caused by Inappropriate Action & Procedure Deficiency.Training Implemented
05000413/LER-1987-028, :on 870711,reactor Automatically Tripped on Inadvertently Simulated Turbine Trip.Caused by Failure of Disk Dump Valve to Reseat.Mod Installed to Main Turbine Valves & All Disk Valves Will Be Inspected
05000352/LER-1987-055, :on 871002,nonconformance W/Fire Safe Shutdown Requirements Identified.Caused by Procedure Deficiency.Flow Switch Relays Removed & Flow Switch Deenergized.App R Review Evaluated
05000413/LER-1987-023, :on 870411,surveillance of Fire Detection Zones Missed Due to Lack of Administrative Controls for Retiring Tech Spec Standing Work Requests.Work Request Initiated & Surveillance Requirements Performed
05000482/LER-1989-002, :on 890123,reactor Trip Occurred.Caused by Spurious Signal in Vibration Monitoring Circuitry Which Incorrectly Indicated High Vibration on Main Turbine 7 Bearing.Turbine High Vibration Trip Modified
05000413/LER-1987-012, :on 870311,instrument Air Supplies for Three Pressurizer PORVs Discovered Incorrectly Connected.Caused by Design/Installation Deficiency & Personnel Error.Air Supplies Rerouted
05000369/LER-1986-020-03, :on 861028,charging Line Outside Containment Isolation Valves Declared Inoperable Due to Incorrect Torque Settings on Rotork Motor Operators.Caused by Mfg Deficiency. Procedures Revised & Operators Evaluated
05000275/LER-1985-033, :on 851025,automatic Reactor & Turbine Trips Occurred Due to Reactor Coolant Pump Breaker Position Relay Opening Momentarily.Caused by Shorted Capacitator in Comparator Module
05000382/LER-1985-034, :on 850707,reactor Trip & Emergency Feedwater Actuation Occurred.Caused by Personnel Error Due to Incorrect Positioning of Backwash Selector Switch.Mod Package Prepared to Increase Sys Reliability
05000413/LER-1985-028, :on 850422,both RHR Trains Inoperable & RCS Draining Began While Train a Inoperable Due to Maint.Caused by Personnel Error.Centrifugal Charging Pump a Started to Restore PCS Sys Level
05000366/LER-1992-025-01, :on 921119,discovered That Analog Transmitter Trip Sys Trip Units for HPCI & RCIC Not Functionally Tested, Per Ts.On 921120,discovered That PCIS Valves Also Affected. Caused by Personnel Error.Personnel Counseled
05000269/LER-1985-007-02, :on 850425,reactor Tripped from 94% Full Power When Both Main Feedwater Pumps Tripped on High Discharge Pressure.Caused by Static Inverter & Related Static Transfer Switch.Components Replaced
05000316/LER-1984-029, :on 841118,reactor Manually Tripped from Approx 73% Power.Caused by Partially Stuck Open Pressurizer Spray Valve.Valve Placed in Closed Position & Air Removed from Operator
05000315/LER-1985-007-01, :on 850222,controlled Shutdown Initiated. Caused by Inoperable Control Room Emergency Ventilation Sys. Analysis of Potential Radiological Consequences of Operation at Higher Flow Rates Performed.Room Balanced
05000278/LER-1995-005-03, :on 951108,three of Eleven MSRVs Did Not Lift within TS +1% Tolerance Due to Small Drift in Setpoint of Valves.Refurbished Valves Have Been Properly Setup at Test Facility & Install for All MSRVs & SVs
05000374/LER-1984-023-01, :on 840529,reactor Water Cleanup Sys Isolated Three Separate Times on High Differential Temp.After Reactor Water Cleanup Sys Restarted,Sys Isolated on High Differential Flow.Caused by Damaged Valve
05000278/LER-1991-010-03, :on 910707,reactor Scram Occurred as Result of Main Generator Load Reject Trip Signal.Caused by Lightning. Scram & Isolations Reset,Sys Returned to Normal & Damaged Components Replaced
PLA-2248, Monthly Operating Repts for June 1984
05000278/LER-1991-011-03, :on 910710,RPS Half Scram Occurred When RPS B Motor Generator Set Outpoint Breaker Tripped During Troubleshooting.Caused by RPS M/G Set Outpoint Breaker Trip. Scram & Isolations Reset
05000325/LER-1991-018, :on 910718,reactor Scram Occurred Resulting from Common Instrument Perturbation.Caused by Leaking Isolation Valve.Isolation Valve Removed for Testing & Replaced W/Isolation Valve Manifold
05000483/LER-1994-005, :on 940820,missed TS 4.3.3.6 Surveillance Thermocouple/Core Cooling Detection Sys Due to Inadequate Surveillance Procedures.Surveillance Procedure OSP-SH-00001 Revised
05000278/LER-1989-012-01, :on 891222,determination Made That Potential Existed for Loss of Reactor Coolant Inventory Beyond Makeup Capability of RCIC Sys Relied Upon in Fire Protection Program Analysis for Fire in Fire Area 13N
RBG-16-594, Forwards Description of ASME III Subsection Nf Support Program Per 831213 Telcon.Info Will Be Included in Future FSAR Amend
05000338/LER-1990-003, :on 900228,52 Valves Identified Not Included in Tech Spec Required Monthly Containment Integrity Verification Surveillance Program.Caused by Personnel Error & Inadequate Procedure.Procedure Revised
ST-HL-AE-3750, Application for Amends to Licenses NPF-76 & NPF-80,changing TS 2.2.1,3.3.1 & Tables 2.2-1,3.3-1,3.3-2 & 4.3-1,Item 4 Re Negative Flux Rate Trip of Reactor
ST-HL-AE-3666, Requests Waiver of Compliance from Requirements of TS 3.3.3.1,Table 3.3-6 on one-time Basis
05000259/LER-1978-008-01, /01T-1 on 780318:analysis Based on in-plant Measurements of Real & Reactive Loads Indicated That for Certain Conditions in Offsite Power Supply,Tech Spec 3.9.A.1 Could Not Be Met.Corrective Devices Installed
PLA-6603, Extended Power Uprate Master Test Procedure TP-199-013
PLA-6351, Transmittal of Startup Test Procedures Pursuant to License Conditions 2.C. (36) (B) 8 and 2.C. (36) (C)