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| Issue date | Title | Topic | |
|---|---|---|---|
| ML20085G098 | 29 October 1973 | AO BFAO-7330W:on 731019,approx 1,400 Gallons Unanalyzed Liquid Radwaste Released Into River.Caused by Placing Floor Drain Sample Tanks on Recycle Before Sampling Contents. Procedures Will Be Changed | |
| ML20085G106 | 19 October 1973 | Telecopy AO on 731019,unanalyzed Radwaste Released Into River.Discharge Activity Did Not Exceed License Limit | |
| ML20085G113 | 17 January 1975 | AO BFAO-50-260/751W:on 750107,RCIC Failed to Operate After Planned Turbine Trip.Caused by Electronic Overspeed Trip Due to Dropping Resistor Open Circuiting in Resistor Box. Resistor Replaced & Voltage Verified | |
| ML20085G116 | 26 October 1973 | AO BFAO-7329W:on 731018 & 19,HPCI Inverter Power Supply Fuse Failed.Caused by Wiring Error Resulting from Design Change. Wiring Corrected & Tested | |
| ML20085G122 | 22 October 1973 | Telecopy AO BFAO-7329T:on 731018 & 19,HPCI Inverter Power Supply Fuse Blew.Fuse Replaced & Failed Again.Fuse Replaced & Accelerated Program to Determine Cause Initiated | |
| ML20085G126 | 29 November 1974 | AO BFAO-50-260/7427W:on 741121,core Spray Injection Valve 2-FCV-75-53 Failed to Open.Caused by Jammed Valve Due to Misadjustment of Closing Limit Switch on Valve Operator. Opening & Closing Limit Switches Adjusted | |
| ML20085G145 | 26 October 1973 | AO BFAO-7328W:on 731017,HPCI Condensate Header Low Level Switches LS-73-56A & B Exceeded Tech Spec Limit.Caused by Sluggish Switch Spring Mechanisms.Wider Air Gap Established, Switches Reset & Test Frequency Increased | |
| ML20085G154 | 18 October 1973 | Telcopy AO BFAO-7328T:on 731017,HPCI Condensate Header Low Level Switches LS-73-56A & B Exceeded Tech Spec Trip Level Settings | |
| ML20085G161 | 27 December 1974 | AO BFAO-50-260/7436W:on 741218,drywell Sampling Monitor Found 2-RM-90-256 Inoperable.Caused by Failure of Four 150- Watt Bulbs Used for Heating Monitor Internals.Permanent Heating Sys in Drywell Requested | |
| ML20085G186 | 24 October 1973 | Ao:On 730925,trip Setpoint of 152 Inches for HPCI Flow Switch DPIS 3-2353 Exceeded Tech Spec Limit.Caused by Locking Device Failing to Control Setpoint Drift.Switch Setpoint Changed & Calibr Frequency Increased | |
| ML20085G188 | 26 October 1973 | AO BFAO-7327W:on 731016,setpoint of 1.8 Psid for Recirculation Jet Pump Riser Differential Pressure Switch PdIS-68-24 Exceeded Tech Spec Limit.Switch Recalibr,Tested & Frequency Increased to Once Every 2 Wks | |
| ML20085G227 | 10 February 1975 | AO BFAO-50-259/751W:on 750131,time for RHRSW Pump D1 Start Sequence Time Delay Relay TD1-D Improperly Set.Caused by Inadvertent Moving of Timer Dial Setting Since Previous Surveillance Test.Relay Recalibr | |
| ML20085G229 | 25 October 1973 | AO BFAO-7326W:on 731015,trip Settings of Differential Pressure Switches PdIS-68-85,PdIS-68-89 & PdIS-68-90 Exceeded Tech Spec Limit.Switches Recalibr & Frequency of Testing Increased to Once Every 2 Wks | |
| ML20085G239 | 27 December 1974 | AO BFAO/50-260/7435W:on 741218,flow Control Valve 2-FCV-74-66 on RHR Sys Loop II Failed to Open.Caused by Loose Locknut Due to Missing Set Screws in Yoke Nut Bearing Locknut.Spare Motor Operator Installed | |
| ML20085G247 | 16 October 1973 | Telecopy AO BFAO-7326T:on 731015,three of Eight Pressure Differential Switches Exceeded Tech Spec Limit | |
| ML20085G261 | 12 December 1974 | AO BFEAO-7422W:on 741202,water Temps in Wheeler Reservoir Not Recorded.Caused by Failure in Computer Controlling of Data Collection.Standby Computer Spare Memory Board Interchanged W/Existing Memory Board | |
| ML20085G263 | 15 October 1973 | AO BFAO-7325W:on 731005,inner Rupture Diaphragm of HPCI Sys Failed.Caused by Several Vacuum Cycles Inside Turbine Discharge Piping.Replacement Rupture Diaphragm Installed & Design Investigation Initiated | |
| ML20085G266 | 4 December 1974 | AO BFAO-50-260/7429W:on 741124,main Steam Relief Valve FCV-1-31 Failed to Reset Properly After Manually Opened. Caused by Excessive Pilot Valve Leakage.Valve Replaced. Installation Monitored | |
| ML20085G274 | 5 October 1973 | AO BFAO-7325T:on 731005,HPCI Sys Failed.Caused by Leaking Ruptured Diaphragm.Surveillance Test Initiated Immediately But RCIC Turbine Governor Failed.Rcic Governor Adjusted & Tested | |
| ML20085G281 | 25 October 1973 | AO BFAO-7324W:on 731015,stack Gas Sample Pump a Motor Failed.Caused by Overheating & Deterioration of Motor Insulation.Spare Motor Installed,Sample Sys Returned to Svc & Design Changes Re Motor Circuitry Proposed | |
| ML20085G284 | 19 October 1973 | AO BFAO-7323W:on 731011,vacuum Readings for Turbine Condenser Low Vacuum Switches PS-2-1A & PS-2-1D Exceeded Tech Spec Limit.Mechanisms of Switches Inspected,Switches Recalibr & Testing Frequency Increased | |
| ML20085G288 | 12 October 1973 | Telecopy AO BFAO-7323T:on 731011,vacuum Readings for Turbine Condenser Low Vacuum Switches PS-2-1A & PS-2-1D Exceeded Tech Spec Limit | |
| ML20085G301 | 19 October 1973 | AO BFAO-7322W:on 731009,reactor Water Level Switches L1S-3-203B & L1S-3-203C Exceeded Tech Spec Setpoint at Readings of 537.5 & 537.2 Inches,Respectively.Switches Recalibr & Frequency of Testing Increased to Every 2 Wks | |
| ML20085G309 | 17 October 1973 | AO BFAO-7321W:on 731007,drywell Pressure Switches PS-64-56B & PS-64-56C Exceeded Tech Spec Setpoint.Switch Mechanisms Inspected,Switches Recalibr & Frequency of Testing Increased to Once Every 2 Wks | |
| ML20085G324 | 8 October 1973 | Telecopy AO BFAO-7321T:on 731007,setpoints of 2.05 & 2.02 Psig for Drywell Pressure Switches PS-64-56B & PS-64-56C Exceeded Tech Spec Limit | |
| ML20085G332 | 15 October 1973 | AOs Bf EAO-7325 Through 7330 Re Fish Killed When Impinged on Intake Screens on 731005-13.Incidents Occurred While Washing Circulating Water Pump Traveling Screens.Tobulation of Fish Kill Estimates Submitted | |
| ML20085G336 | 6 October 1973 | Telecopy AO of Estimated Fish Impingement on 731005 & 06 | |
| ML20085G343 | 12 October 1973 | AO BFAO-7320W:on 731003-04:control Rod Drive 54-27 & 26-55 in Fully Withdrawn Insequence Condition.Strainer for Rod 26-55 Cleaned,Violation of Tech Spec Assumed & Occurrence Being Reviewed | |
| ML20085G354 | 4 October 1973 | Telecopy AO BFAO-7320T:on 731003 & 04:control Rod Drives 54-27 & 26-5S in Fully Withdrawn Insequence Condition | |
| ML20085G389 | 10 October 1973 | AO BFAO-7319W:on 731001,reactor Water Cleanup Sys Valve PCV-69-12 Failed.Caused by Stripped Brass Worm Gear Teeth of SMB-00 Limitorque Operator.Operator Replaced & Frequency of Surveillance Increased to Monthly | |
| ML20085G392 | 2 October 1973 | Telecopy AO BFAO-7319T:on 731001,reactor Water Cleanup Sys Isolation Valve FVC-69-12 Failed.Caused by Problem W/Drive Gear Train.Isolation Valve Manually Closed & Investigation & Repair Continued | |
| ML20085G401 | 5 October 1973 | AOs Bf EAO-7319 Through 7324 Re Fish Killed When Impinged on Intake Screens on 730928-1004.Incidents Occurred During Washing of Circulating Water Pump Traveling Screens | |
| ML20085G406 | 13 December 1974 | AO BFAO-50-260/7431W:on 741203,HPCI Automatically Initiated Due to Low Reactor Water Level.Cause Not Determined. Corrective Actions Under Investigation | |
| ML20085G411 | 4 October 1973 | Telecopy AO BFEAO-7324T Re Fish Impingement on 731004 | |
| ML20085G415 | 29 September 1973 | Telecopy AO BFEAO-7320:on 730929,fish Impingement of 3,000 Gizzard Shad & 270 Other Species Found | |
| ML20085G429 | 5 October 1973 | AO BFAO-7318W:on 730929,during Startup Testing,Hpci Invertor Power Supply Fuse Failed.Cause Under Investigation.Fuse Replaced | |
| ML20085G430 | 18 December 1974 | AO BFAO-50-260/7434W:on 741208,leak Indications Found on Main Steam Relief Valve Bellows 2-PCV-1-41 & 2-PCV-1-5. Caused by Shorted Cable Due to Melted Cable Insulation. Caused Repaired | |
| ML20085G435 | 5 October 1973 | AO BFAO-7317W:on 730927,RCIC Sys Flow Indicator FI-71-1A Indicated Negative Steamflow.Caused by Crossed High & Low Pressure Instrument Lines.Instrument Lines Reversed.All Lines Will Be Checked | |
| ML20085G438 | 23 August 1973 | AO BFAO-735W:on 730813,111.5 Psid Setpoint for Pressure Switch PdIS-1-36A of Main Steamline C High Flow Exceeded Tech Spec Limit of 108.75 Psid.Cause of Setpoint Drift Not Determined.Switch Reset | |
| ML20085G447 | 5 October 1973 | AO BFAO-7316W:on 730926,while Investigating Cause of Stack Gas Flow Abnormal Alarm,Stack Gas Monitor a Pump Motor Failed.Caused by Bad Motor Bearing Causing Motor Overload & Overheating.Motor & Fuse Replaced | |
| ML20085G451 | 28 September 1973 | AO BFAO-7315W:on 730920,93-psid Setting for Differential Pressure Switch Exceeded Tech Spec Limit.Caused by Switch Actuator Arm Offsetting.Arm Adjusted,Switch Recalibr & Monthly Testing Increased to Weekly | |
| ML20085G462 | 28 September 1973 | AO BFAO-7314W:on 730919,two Relief Valves Did Not Operate within Specified Limiting Settings.Administrative Procedures Will Be Strengthened & Temporary Tech Spec Rev Permitting Valve Operation at Improper Setting Initiated | |
| ML20085G464 | 14 August 1973 | Telecopy AO Bfnp AO 73T:111.5 Psid Setpoint of Pressure Switch PDIS-1-36A Exceeded Tech Spec Limit of 108.75 Psid. Switch Reset to Setpoint of 106.5 Psid | |
| ML20085G526 | 24 August 1973 | AO BFAO-736W:on 730816,level Switch LS-73-56B Exceeded Tech Spec Trip Level Setting.Caused by Sluggish Level Switch Spring Mechanism.Mechanism Adjusted & Level Switch Reset | |
| ML20085G535 | 17 August 1973 | Telecopy AO BFAO-736T:on 730816,level Switch LS-73-56B Exceeded Tech Spec Limit.Cause Being Investigated | |
| ML20085G567 | 17 August 1973 | AOs Bf EAO-732W Through 735W Re Shad Minnows & Other Fish Impinged on Intake Screens on 730809-14.Caused by Seasonal Concentrations of Young Shad & Incomplete Const of Intake Control Structure | |
| ML20085G583 | 8 September 1973 | Telecopy AO Bfeao 7312:on 730807,1200 Shad Fish Impinged | |
| ML20085G596 | 6 January 1975 | AO BFAO-50-259/7461W:on 741227,dampening Pins in Main Steam Line high-flow Pressure Switch Snubbers Installed W/O Proper Review & Authorization.Caused by Personnel Error. Procedures Revised | |
| ML20085G601 | 9 August 1973 | Telecopy AO BFAO-734T:on 730808,refueling Zone Vacuum Increased to Approx 0.8 Inch.Caused by Static Pressure Control Modulating Dampers Failure.Fuel Handling Operations Immediately Suspenede & Region II Notified | |
| ML20085G607 | 3 January 1975 | AO BFAO-50-259/7460W:on 741224,offgas Radiation Monitor Found Inoperable.Caused by Abnormal Leakage of Local Offgas Sample Flow Rotometer Due to Failure of O-ring to Seal properly.O-ring Reassembled |