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| Issue date | Title | Topic | |
|---|---|---|---|
| ML20085H151 | 20 September 1974 | AO BFAO-50-259/7446W:on 740910,average Power Range Monitor Channel D Flow Bias Scram Calibr Error Discovered.Caused by Personnel Error.Instrument Mechanics Instructed on Importance of Following Surveillance Instructions | |
| ML20085H154 | 30 August 1974 | AO BFAO-50-259/7445W:on 740820,RCIC Failed to Start During Autoinitiation.Caused by Turbine Trip on Overspeed Due to generator-signal Converter & EG-M Control Being Out of Calibr.Equipment Recalibr | |
| ML20085H164 | 29 August 1974 | AO BFAO-50-260/748W:on 740819,RCIC Pump Suction Valve FCV-2-71-18 Failed.Caused by Frozen Torque Switch.Torque Switch Replaced | |
| ML20085L918 | 22 March 1974 | AO BFAO-7415W:on 740312,during Startup,Rod Sequence Control Sys Automatically Removed from Operation at 26% Thermal Power.Caused by Wrong Setting of first-stage Pressure Switches.Switches Reset | |
| ML20085L931 | 21 March 1974 | AO BFAO-7414W:on 740311,during Planned Load Rejection Test from 75% Power,Hpci Actuated Automatically W/Pressure 100 Psi Above Normal.Cause Unknown.Hpci Response During Test Will Be Closely Monitored | |
| ML20085L941 | 1 March 1974 | AO Bf EAO-418W:on 740218,during Collection of Fish Impinged on Screen,Screen Differential Pressure Increased Suddenly Causing Operator to Omit Fish Count.Temporary Diverter Gate Installed Pending Intake Structure Mod | |
| ML20085L943 | 7 March 1974 | AO BFAO-7413W:on 740225,during Diesel Generator Test,Diesel Generator a Failed to Start W/Left Bank of Starters.Caused by Rust from Air Supply Sys.Replacement Starters Installed & Air Supply Sys Blown Out | |
| ML20085L950 | 26 February 1974 | Telecopy AO BFAO-7413T:on 740225,left Bank of Air Start Motors on Diesel Generator a Failed to Start.Caused by Engine Air Supply & Starter Sys Malfunction.Right Bank Start Motors Started Engine Satisfactorily | |
| ML20085L955 | 7 March 1974 | AO BFAO-7412W:on 740226,MSIV FCV-1-27 Actuated Twice W/Closure Time Below Tech Spec Requirements.Caused by Oil from Leaking Oil Pipe on Valve dashpot.Auto-Panent Flow Control Valve Adjusted | |
| ML20085L964 | 26 February 1974 | Telecopy AO BFAO-7412:during Routine Surveillance Test,Msiv FCV-1-27 Outboard Valve Line B Actuated W/Closure Time Less than Tech Specs.Closure Time Adjusted.Startup Test Continuing | |
| ML20085L972 | 1 March 1974 | AO BFAO-7411W:on 740221,during Routine Testing,Check Light for Suppression Chamber to Drywell Vacuum Breaker FCV-64-28M Failed to Go Out When Valve Operated.Caused by Limit Switch Failure.Circuit Will Be Repaired | |
| ML20085L998 | 19 April 1974 | Amend 1 to Aos:Causes of Drifting Setpoints on Barton Differential Pressure Indicating Switches Determined to Be Severe Vibration Environ & Errors in Electrical Switch Calibr Technique | |
| ML20085M004 | 22 February 1974 | AO BFAO-7410W:on 740213,during Routine Surveillance Testing, Main Steam Line High Flow Switches PdIS-1-36B & PdIS-1-50A Malfunctioned.Caused by Setpoint Drift.Switches Reset | |
| ML20085M007 | 14 February 1974 | Telecopy AO BFAO-7410T:on 740213,during Routine Surveillance Testing,Main Steam Line High Flow Pressure Switches PdIS-1-36B & PdIS-1-50A Found Outside Tech Spec Trip Level Settings.Switches Reset & Checked for Repeatability | |
| ML20085M021 | 22 February 1974 | AO BFAO-749W:on 740212,during Blowdown Following Main Steam Line Isolation Valve Closure,Pressure Relief Valve PCV 1-41 on Main Steam Header Failed to Reseat.Cause Unknown.Valve Replaced | |
| ML20085M025 | 13 February 1974 | Telecopy AO BFAO-749T:during Shutdown,Pressure Relief Valve PCV 1-41 Failed to Reseat After 1,080 Psig Setpoint Lifted | |
| ML20085M035 | 7 February 1974 | AO BFAO-748W:on 740128,during Startup Testing,Reactor & Turbine Bldg Ventilation Radiation Monitor Removed from Svc in Excess of 1 H W/O Addl Monitoring.Caused by Instrument Mechanic Error.Mechanic Counseled | |
| ML20085M046 | 5 February 1974 | AO BFAO-747W:on 730126,during Startup Testing,Failure of HPCI Sys to Pump to Vessel Experienced.Caused by High Gain Setting on Flow Controller.Gain of Flow Controller Decreased.Defective Components Replaced | |
| ML20085M053 | 27 January 1974 | Telecopy AO BFAO-747T:on 730126,during Startup Testing, HPCI to Reactor Aborted Due to HPCI Instability | |
| ML20085M143 | 22 February 1974 | AO BFAO-746W:on 731113,during Startup Test Program, Radioactive Matl Discovered Released to Unit 2 Reactor Bldg Floor Drain Sumps.Cause Undetermined.Rept Mistakenly Submitted to Directorate of Licensing on 740130 | |
| ML20085M151 | 30 January 1974 | AO BFAO-746W:on 731113,during Startup Test Program, Radioactive Matl Discovered Released to Unit 2 Reactor Bldg Floor Drain Sumps.Cause Undetermined.Lines Connecting Unit 1 & 2 Backwash Sys Modified | |
| ML20085M171 | 25 January 1974 | AOs BF-EAO-748W Through BF-EAO-7414:during 740116-24,fish Killed When Impinged on Intake Screens.Proposal to Change ETS to End Requirements for Daily Impingement Repts Sent to Directorate of Licensing | |
| ML20085M185 | 25 January 1974 | AO BFAO-745W:on 740117,during Routine Surveillance Testing of Standby Liquid Control Sys,Shaft Seal Packing on Standby Liquid Control Pump 1B Leaked Excessively.Caused by Failed Packing.Packing Replaced | |
| ML20085M192 | 18 January 1974 | Telecopy AO BFAO-745T:on 740117,during Routine Surveillance Testing of Standby Liquid Control Sys,Shaft Packing on Standby Liquid Control Pump 1B Leaked Excessively.Packing Replaced | |
| ML20085M199 | 25 January 1974 | AO BFAO-744W:on 740116,during Routine Surveillance Testing of Diesel Generator,Diesel Engine B Failed to Start W/Left Bank of Starters.Caused by Rust & Possible Inadequate Lubrication.Replacement Starter Installed | |
| ML20085M217 | 17 January 1974 | AO BFAO-743W:on 740109,during Startup Test Program,Lpci Break Detection Pressure Switches PS-3-186A & PS-3-186B Found Valved Out.Caused by Personnel Error.Instructions Revised to Ensure Instrument Alignment Following Maint Work | |
| ML20085M227 | 17 January 1974 | AO BFAO-742W:on 740108,main Steam Inboard Isolation Valves FCV 1-26 & FCV 1-51 Failed to Close as Required.Cause Unknown.Adjustment of Auto-Ponent Flow Control Valves Restored Valve Closure Timing to Acceptable Limits | |
| ML20085M237 | 10 January 1974 | Telecopy AO BFAO-742T:on 740108,during Startup Testing,Msivs FCV 1-26 & FCV 1-51 Failed to Close as Required.Closure Time Adjusted | |
| ML20085M246 | 17 January 1974 | AOs BF-EAO-742W Through BF-EAO-747W,during Period 740107-14, Fish Killed When Impinged on Intake Screens.Proposal to Change ETS to End Requirements for Daily Impingement Repts Sent to Directorate of Licensing | |
| ML20085M273 | 15 January 1974 | AO BFAO-741W:on 740106,during Startup Test Program,Reactor Water Level Switches LIS-3-203A,B,C & D Malfunctioned.Caused by Setpoint Drift.Offset Will Be Considered in Setpoint Calibr | |
| ML20085M284 | 7 January 1974 | Telecopy AO BFAO-741:on 740106,during Surveillance Testing, Reactor Water Level Switches LIS-3-203A,B,C & D Operated Outside Setpoint Limits | |
| ML20085M294 | 14 January 1974 | AO BFAO-7352W:on 740104,during Startup Testing,Recirculation Pump a D/P Indicating Switch PdIS-68-85 Malfunctioned.Caused by Setpoint Drift.Switch Reset.Testing Frequency Will Be Increased | |
| ML20085M295 | 9 January 1974 | AO BFAO-7351W:on 731230,during Routine Surveillance Test, Inboard Drywell Isolation Valve FCV 77-2A Failed to Close. Caused by Pilot Solenoid Valve Fsv 77-2A Failure to Operate. Solenoid Valve Replaced | |
| ML20085M314 | 3 January 1974 | AO BFAO-7350W:on 731228,during Scheduled Maint Testing, Diesel Generator C Failed to Start.Caused by Loose Terminal Connection in Start Circuit 1.Connection Reterminated | |
| ML20085M328 | 4 January 1974 | AO BFAO-7349W:on 731225,bellows Seal Leakage Alarm Indicating Light for PCV-1-18 Found to Indicate Bellows Leakage.Cause Suspected to Be Failed Pressure Switch.Valve Will Be Replaced | |
| ML20085M334 | 26 December 1973 | Telecopy AO BFAO-7349T:on 731225,during Unit Outage,Reactor Pressure Relief Valve PCV-1-18 Bellows Seal Leakage Alarm Indicating Light Indicated Bellows Leakage | |
| ML20085M341 | 4 January 1974 | AO BFAO-7348W:on 731225,during Routine Surveillance Testing, HPCI Turbine Failed to Reach Rated Speed & Flow.Caused by Open Resistor in Woodward Unit Which Supplies 48-volt Dc Power to Governor Control Box.Resistor Box Replaced | Safe Shutdown |
| ML20085M346 | 26 December 1973 | Telecopy AO BFAO-7348T:on 731225,during Routine Surveillance Testing,Hpci Turbine Failed to Reach Rated Speed & Flow. Cause Appears to Be in Turbine Hydraulic Control Sys | |
| ML20085M381 | 28 December 1973 | AOs Bf EAO-7381W Through Bf EAO-7384W:on 731219-27,fish Killed When Impinged on Intake Screens.Number of Fish Impinged Per AO Bf EAO-7380 Corrected to Include Second Washing Estimate | |
| ML20085M388 | 20 December 1973 | AOs Bf EAO-7378W Through Bf EAO-7380W:on 731213-17,fish Killed When Impinged on Intake Screens.Proposal to Change ETS to End Requirements for Daily Impingement Repts Sent to AEC Directorate of Licensing | |
| ML20085M400 | 28 December 1973 | AO BFAO-7347W:on 731219,during Outage for Maint,Standby Emergency Diesel Generator a Failed to Start Emergency Core Cooling Pump.Caused by Voltage Regulator Failure.Voltage Regulator Replaced | |
| ML20085M404 | 20 December 1973 | Telecopy AO BFAO-7347T:on 731219,during Preoperational Tests on Unit 2,RHR Pump 2A Tripped While Powered from Diesel Generator a | |
| ML20085M408 | 14 December 1973 | AOs Bf EAO-7371W Through Bf EAO-7377W:on 731206-12,fish Killed When Impinged on Intake Screen.Proposal to Change ETS to End Requirements for Daily Impingement Repts Sent to AEC Directorate of Licensing | |
| ML20085M416 | 14 December 1973 | AO BFAO-7346W:on 731206,during Surveillance Test, Recirculation Pump a Indication Switch PdIS-68-85 Malfunctioned.Caused by Setpoint Drift.New Locking Device Installed | |
| ML20085M420 | 9 December 1973 | Telecopy AO-BFAO-7346T:on 731206,during Routine Surveillance Testing,Pressure Differential Switch Used in LPCI Brake Detection Logic & Recirculation Pump Exceeded Limits & Actuated | |
| ML20085M466 | 7 December 1973 | AOs Bf EAO-7364W Through Bf EAO-7370W:on 731129-1205,fish Killed When Impinged on Intake Screens.Proposal to Change ETS to End Requirements for Daily Impingement Repts Sent to AEC Directorate of Licensing | |
| ML20085M507 | 10 December 1973 | AO BFAO-7345W:on 731130,during Routine Daily Instrument Checks,Core Spray Sparger to Reactor Pressure Vessel Alarm Delta/Pressure Switches PdIS-75-28 & PdIS-75-56 Found Inoperable.Caused by Misapplication of Switches | |
| ML20085M516 | 7 December 1973 | AO BFAO-7344W:on 731130,during Startup Testing,Main Steam Line High Flow Pressure Switch PdIS-1-25D Malfunctioned. Caused by Faulty Indication.Pressure Switch Replaced | |
| ML20085M532 | 30 November 1973 | AO BF-EAO-7357W Through BF-EAO-7363W:on 731121-27,fish Killed When Impinged on Intake Screens.Proposal to Change ETS to End Requirements for Daily Impingement Repts Sent to AEC Directorate of Licensing | |
| ML20085M635 | 17 December 1973 | Interim AO BFAO-7343W Re 731118 Vibrations in Torus & torus-ring Header.Strain Gages & Special Instrumentation Will Be Reinstalled.Final Rept Will Be Submitted After Testing |