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| Issue date | Title | Topic | |
|---|---|---|---|
| ML20084J121 | 4 June 1973 | Telecopy Ao:On 730604,during Surveillance Test,Pump 1B of Standby Liquid Control Sys Did Not Meet Required Flow Rate. Cause Under Investigation | |
| ML20084J126 | 15 May 1973 | Ao:On 730506,during Planned outage,1/2 Diesel Generator Would Not Start Following Inadvertent Trip of Power Supply to Buses 13 & 13-1.Caused by Welding Together of Str/Hga Relay Contacts & Air Start Solenoid Valve | |
| ML20084J130 | 8 December 1972 | Telecopy Ao:On 721208,chimney Monitoring Sys Discovered to Be Inoperable.Caused by Frozen Sample Line Between Pump, Probe & Chimney.Efforts to Clear Line in Progress | |
| ML20084J134 | 7 May 1973 | Telecopy Ao:On 730506,after 1/2 Diesel Generator Shutdown, Air Starting Accumulators Found Depressurized W/Compressors Running Continuously Following Inadvertent Trip of Buses 13 & 13-1.Caused by Closed Diesel Start Relay Contact | |
| ML20084J162 | 24 November 1972 | Ao:On 721115,following Actuation of Test Switch for MSIV 20, Approx 25 Elapsed Before Valve Movement Detected by Indicating Lights on Control Room Panel 901-3.Caused by Faulty Operating Pilot Valve.Valve Replaced | |
| ML20084J174 | 18 April 1973 | Ao:On 730406,while Returning 1-A Cleanup Demineralizer to Svc,Offgas high-high Alarm Actuated & Offgas 15 Minute Isolation Timer Initiated.Caused by Air Injected Into Reactor While Valving 1-A Cleanup Demineralizer | |
| ML20084J180 | 3 November 1972 | Ao:On 721020,during Testing,Hpci Turbine Stop Valve Would Not Open.Caused by Bent Valve Stem.Stem Replaced | |
| ML20084J184 | 6 April 1973 | Telecopy Ao:On 730406,while Returning Cleanup Demineralizer Sys to Svc,Increase in Water Conductivity & Offgas Activity Observed.Caused by Air Trapped in Cleanup Demineralizer | |
| ML20084J189 | 31 October 1972 | Ao:On 721021,during Operability Test,Core Spray Pump 1B Failed to Start.Caused by Pump Breaker Not Closing.Interlock Cam in Breaker Housing Filed | |
| ML20084J193 | 21 October 1972 | Telecopy Ao:On 721020,core Spray Pump Motor Air Circuit Break Failed to Close.Caused by Failed Auxiliary Contact in Circuit Breaker Cubicles | |
| ML20084J195 | 6 April 1973 | Ao:On 730329,radioactive Liquid Waste Inadvertently Released to Mississippi River.Caused by Improper Floor Drain Sample Tank a Valve Lineup.Inlet Valve Check Procedures Will Be Revised | |
| ML20084J206 | 30 March 1973 | Telecopy Ao:On 730329,radioactive Liquid Inadvertently Released Into River.Caused by Sample Tank Inlet Valve Being Open.Discharge to River Terminated | |
| ML20084J237 | 16 March 1973 | Ao:On 730306,hydrogen Explosion Caused Pressurization of Offgas Pipe Which Broke Rupture Disc in Air Ejector Room, Releasing Radioactivity Through Turbine Bldg Ventilation Sys.Cause Under Investigation.Filter Replaced | Loop seal |
| ML20084J244 | 27 April 1973 | Telecopy Ao:On 730427,during Calibr of Low Level Scram Sensors,Three Switches Found Drifted Beyond Required Setpoint.Switches Recalibr | |
| ML20084J251 | 24 April 1973 | Telecopy Ao:On 730424,during Calibr of LIS 2-263-574,switch Found Drifted Beyond Limit.Other Switches Found within Specs | |
| ML20084J255 | 2 March 1973 | Ao:On 730221 & 22,during Calibr of Pressure Switches,Six Switches Found Set Beyond Tech Spec Limit.Calibr Setpoint Changed | |
| ML20084J262 | 26 February 1973 | Ao:On 730215,during Calibr,Setpoint of dPIS-1-2353 Found Greater than Tech Spec Limit.Decrease in Setpoint Being Reviewed | |
| ML20084J268 | 26 February 1973 | Ao:On 730216,during Calibr,Setpoint Drifts of PS-2-261-30A, B & D Found Below Tech Spec Limits.Setpoint Increased | |
| ML20084J271 | 26 February 1973 | Ao:On 730214,setpoint of PS-1-261-30C Found Below Tech Spec Limit.Setpoint Increased | |
| ML20084J312 | 16 February 1973 | Ao:On 730203,during Test on MSIV Instrument Channels,When 1C Exercised,Reactor Protection Sys Trip Not Received.Caused by Failure of One Relay Monitoring C Steam Line to Drop | |
| ML20084J392 | 25 January 1973 | Ao:On 730118,setpoint of Reactor Low Pressure Switch PS-1-263-52B Found Decreasing,Contrary to Tech Spec Limit. Cause Not Found.Setpoint Recalibr | |
| ML20084J401 | 19 January 1973 | Telecopy Ao:On 730118,reactor Low Pressure Switch PS-1-263-52B Found to Actuate Below Tech Spec Limit.Switch Recalibr | |
| ML20084J490 | 11 January 1973 | Ao:On 721228,setpoint of Electro Hydraulic Control Oil Pressure Switch Ps 1-5600-PS-2 Found Below Tech Spec Limit. Caused by Setpoint Drift.Switch Recalibr | |
| ML20084J495 | 30 December 1972 | Telecopy Ao:On 721228,during Routine Calibr,Electro Hydraulic Control Oil Switch Found to Trip Below Tech Spec Limit.Switch Recalibr | |
| ML20084J499 | 21 December 1972 | Telecopy Ao:On 721220,four Electro Hydraulic Control Oil Pressure Switches Found Set at Less than Tech Spec Limit. Switches Recalibr | |
| ML20084J506 | 27 December 1972 | Ao:On 721220,during Routine Calibr,Electro Hydraulic Control Fluid Low Pressure Switches Found to Open Below Tech Spec Limit.Switches Recalibr | |
| ML20084J522 | 9 January 1973 | Ao:On 721217,standby Liquid Control Sys Storage Tank Level Observed to Be High Following High/Low Level Alarm.Caused by Incorrectly Calibr Tank Vol.Sight Glass to Be Installed to Allow Level Determination | Boric Acid |
| ML20084J524 | 22 December 1972 | Telecopy Ao:On 721217,improper Valve Lineup Resulted in Loss of Flow to Main Chimney Sample Sys.Rept Being Prepared | |
| ML20084J527 | 22 December 1972 | Telecopy Ao:On 721217,improper Valve Lineup Occurred for Approx 1-h.Rept Being Prepared | |
| ML20084J567 | 5 January 1972 | Ro:On 721223,pump Seals of Reactor Water Cleanup Recirculation Pump Leaked.Caused by Failure of Torque Switch to Return Valve to Close Position.Status of Valves & Corrective Action Will Be Submitted by 730115 | |
| ML20084J572 | 24 December 1972 | Telecopy Ao:On 721224,cleanup Sys Outboard Isolation Valve 2-1201-5 Failed to Close | |
| ML20084J577 | 1 December 1972 | Ao:On 721118,trip Level Settings of Two Reactor Protection Sys Instruments & Two Primary Containment Isolation Sys Instruments Drifted Below Tech Spec Requirements.Cause Not Stated.Setpoints Reviewed | |
| ML20084J581 | 25 November 1972 | Telecopy Ao:Two Main Steam Line Flow Switches Drifted Beyond Tech Spec Limit During Calibr.Switches Recalibr | |
| ML20084J584 | 21 November 1972 | Telecopy Ao:On 721118,during Calior,Four Main Steam Line Low Pressure Switches Found W/Trip Setting Exceeding Tech Specs Livel.Switches Recalior | |
| ML20084J589 | 24 July 1972 | Ao:On 720716,small Fire Discovered in Two Electrical Cable Trays of Traversing in-core Probe Room.Caused by Phase T3 Conductor Burned Through at End of Splice.Conductor Bundles Repaired & New Wire Tray Installed | |
| ML20084J590 | 25 August 1972 | Ao:On 720702,during Quarterly Timing Test on Msivs,Valve AO 2-203-2A Closure Time Exceeded Tech Spec Limit.Caused by Inaccurate Timing by Stop Watch.Indicative of Slow Closure Because of Lapsed Test Interval | |
| ML20084J602 | 18 May 1972 | Telecopy Ao:On 720518,HPCI Sys Turning Gear Motor Failed During Phase III of Startup Test.Reactor Shut Down | |
| ML20084J738 | 8 May 1972 | AO 2-72-4:on 720428,during Jet Pump Flow Comparison Checks, Jet Pumps 19 & 20 Indicated Flow Rates at 50% of Other Pumps.Caused by Foreign Matl Obstructing Flow.Pump 20 Removed & Flushed & Startup Program Continued on 720502 | Hydrostatic |
| ML20084J790 | 1 May 1972 | Telecopy AO 2-72-4 Re Jet Pump Flows of Pumps 19 & 20 Indicating Less than 50% of Other Pumps.Jet Pump Removed & Heilarc Welding Outfit Obstruction Discovered | |
| ML20084J859 | 29 April 1972 | AO 2-72-2:on 720423,heat Tracing on Standby Liquid Control Sys Found Deenergized.Caused by Const Omission of Power Supply Cable to Tracing Sys.Temporary Cable Installed | |
| ML20084J862 | 24 April 1972 | Telecopy AO 2-72-2:on 720423,heat Tracing Sys on Pump Section Piping for Standby Liquid Control Sys Failed | |
| ML20084J868 | 24 May 1972 | AO 2-72-9:on 720524,inoperable Water Control Sys Resulted in Low Reactor Water Level Scram.Caused by Essential Svc Motor Generator Motor Failing to Transfer from Normal Supply to Backup Supply | |
| ML20084J870 | 18 May 1972 | Telecopy AO 2-72-6:on 720518,turning Gear Motor on Reactor Coolant Pump Failed in Phase III of Starup Test Program. Reactor Shut Down | |
| ML20084J881 | 14 April 1972 | Telecopy AO 1-72-6:on 720414,diesel Generator Failed.Caused by High Crankcase Pressure | |
| ML20084J897 | 4 May 1972 | AO 2-72-3:on 720426,diesel Generator 2 Tripped.Caused by Electrical Mechanic Erroneously Installing Jumpers on Unit 1 Instead of Unit 2.Shift Personnel Informed & Independent Audit Check by Third Person Added | |
| ML20084J919 | 27 April 1972 | Telecopy AO 2-72-3:on 720426,diesel Generator 2 Tripped. Caused by Erroneous Installation of Jumper on Unit 1 Instead of Unit 2.Jumper Correctly Installed | |
| ML20084J959 | 19 April 1972 | AO 1-72-5:on 720411,RCIC Sys Failed to Deliver 400 Gpm in Less than 30-S.Caused by Electrical to Hydraulic Transducer Not Functioning.Defective Egr Unit Replaced | |
| ML20084J979 | 12 April 1972 | Telecopy AO 1-72-5:on 720411,RCIC Failed | |
| ML20084K003 | 4 October 1974 | AO 50-265/74-27:on 740925,during Load Increase,High Reactor Water Conductivity Discovered.Caused by Unusual Svc Condition Re Discharging Waste Water.Load Increase Stopped & Second Cleanup Sys Demineralizer Operated | |
| ML20084K016 | 24 September 1974 | AO 50-254/74-28:on 740914,low Pressure Scram Switch Tripped Outside Tech Spec Limits.Caused by Instrument Setpoint Drift.Switch Recalibr & New Piston Assemblies Ordered |