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Issue date | Title | Topic | |
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ML17303A433 | 9 June 1987 | Special Rept 2-SR-87-017:on 870604,reactor/turbine Trip Occurred Due to Low Level Condition in Steam Generator 2. Trip Caused Excessive Feedwater Flow Which Was Attributed to Delay in Closing Economizer Valves | |
ML17303A483 | 10 July 1987 | Special Rept 2-SR-87-020:on 870619,inoperable Containment Bldg Atmosphere Pressure Monitor RU-1 Exceeded 72 H Limit. Caused by Need to Replace Channel 2 Detector.Radiation Monitoring Unit Task Force Established to Review Occurrence | |
ML17303A487 | 10 July 1987 | Special Rept SR-87-003:on 870613,diesel Generator a Tripped on Sensed Overspeed Condition.Caused by Separation of 2 Piece Connecting Cable at Coupling.Separated Cable Reconnected.Investigation Into Cause of Separation Ongoing | |
ML17303A516 | 17 July 1987 | Special Rept 2-SR-87-021:on 870620,noble Gas Activity Monitor RU-141 Experienced Microprocessor Lockup.Cause Unknown.Troubleshooting Conducted to Reset Central Processing Unit to Remove Monitor from Lockup | |
ML17303A642 | 23 October 1987 | Special Rept 2-SR-87-002-01:on 870222,inoperability of high-range Noble Gas Activity Monitor RU-144 Exceeded 72 H Tech Spec Limit.Caused by Performance of Maint Work on Monitor.Voltage Supply Replaced & Monitor Returned to Svc | |
ML17303A643 | 23 October 1987 | Supplemental Special Rept 2-SR-86-037-01:on 861107,Tech Spec Requirement Violated.Caused by Inoperability of Containment Monitor RU-1 for More than 72 H Due to Inoperable Particulate Channel.Channel Tested & Declared Operable | |
ML17303A644 | 23 October 1987 | Special Rept 2-SR-87-021-01:on 870625,condenser Evacuation Sys High Range Monitor Inoperable for Greater than 72 H. Caused by Microprocessor Lockup.Central Processing Unit Replaced | |
ML17303A668 | 29 October 1987 | Special Rept 2-SR-87-025:on 871002,radiation Monitoring Unit RU-142 Declared Inoperable for Greater than 72 H.Caused by Intermittent Fluctuations Occurring in Cpu Board Reset Switch.Monitors Declared Operable & Returned to Svc | |
ML17303A672 | 3 November 1987 | Special Rept 2-SR-87-026:on 871007,radiation Monitor Inoperable for Greater than 72 H.Caused by Noises in Air pump.RU-1 Declared Operable After Satisfactory Installation & Testing of Replacement Air Pump | |
ML17303A673 | 5 November 1987 | Special Rept 1-SR-87-023:on 870930,cathodic Protection Sys for Diesel Generator Fuel Oil Storage Tanks Inoperable for More than 30 Days.Caused by Delay in Delivery of Anode Bed Backfill Matl.Mod Completion Expected by 871215 | |
ML17303A676 | 5 November 1987 | Special Rept 2-SR-87-027:on 871009,high Range Noble Gas Monitor Inoperable for Greater than 72 H.Caused by Malfunctioning of RU-143 Smic Display Board.Display Board Replaced | |
ML17303A677 | 5 November 1987 | Special Rept 2-SR-87-005-01:on 870110,high-range Noble Gas Activity Monitor Inoperable for Greater than 72 H.Monitor Removed from Svc to Allow Replacement of Memory Chip as Sys Upgrade.Monitor Declared Operable on 870316 | |
ML17303A680 | 9 November 1987 | Special Rept 3-SR-87-007:on 871013,emergency Diesel Generator a Tripped on Incomplete Sequence.Caused by Defective Power Resistor Due to Overheating & Fatigue. Design Change Initiated to Replace Power Resistors | |
ML17303A696 | 18 November 1987 | Special Rept 2-SR-87-028:on 871014,post-accident Sampling Sys (PASS) Inoperable Due to Radioactive Water Leak.Caused by Leakage Through PASS Sample Isolation Valve.Pass Sample Isolation Valve & Liquid Septum Replaced | |
ML17303A697 | 18 November 1987 | Special Rept 3-SR-87-005:on 871020,condenser Evacuation Sys Radioactive Gaseous Effluent Monitors Declared Inoperable Due to Erratic Readings on RU-141.Caused by Noise within Detector.Detector Replaced & Surveillance Commenced | |
ML17303A705 | 24 November 1987 | Suppl 2 to Special Rept 2-SR-86-008:on 860326,condenser Evacuation Sys high-range Radiation Monitor Declared Inoperable & Exceeded Tech Spec Limit.Caused by Moisture in in Process/Sample Flow Media Causing Flow Filter Clogging | |
ML17303A726 | 7 January 1988 | Special Rept 3-SR-87-009:on 871211,plant Vent High Range Gaseous Activity Monitor RU-144 Inoperable for Greater than 72 H.Caused by Isolation Board Malfunction.Board Replaced & Retested & Surveillance Tests for Monitors Completed | |
ML17303A731 | 12 January 1987 | Special Rept 3-SR-87-008,on 871217,containment Vessel Structural Integrity Not Verified within Required Time Frame.Caused by Surveillance Test 73ST-32CO1 Not Completed. Containment Vessel Declared Operable on 871218 | |
ML17303A994 | 5 April 1988 | Special Rept 2-SR-88-001:on 880311,radioactive Gaseous Effluent Monitors RU-144 & RU-143 Rendered Inoperable for Greater than 72 H.Caused by Reworking & Replacing of Components to Correct High Voltage Failure | |
ML17303B003 | 4 April 1988 | Special Rept 1-SR-88-003:on 880304,output Breaker on Diesel Generator B Did Not Close Properly During Surveillance Testing.Cause Undetermined.Evaluation Initiated to Determine Cause of Improper Breaker Operation | |
ML17303B019 | 8 April 1988 | Special Rept 1-SR-88-002:on 880314,72 H Limit for Returning Containment Area Monitor to Svc Exceeded.Cause Undetermined. Containment Area Monitor RU-149 Not Returned to Operable Status Pending Evaluation of Data | |
ML17303B026 | 12 April 1988 | Special Rept 1-SR-88-004:on 880407,loose Part Detection Instrumentation Declared Inoperable for More than 30 Days. Caused by Breakup of Signal Coming from Sensor.Work Control Document Prepared & Will Be Scheduled for Next Outage | |
ML17303B053 | 18 April 1988 | Special Rept 3-SR-88-002:on 880328,radiation Monitoring Unit Inoperable for Greater than 72 H Due to Unsatisfactory Performance of Source Check.Caused by Excessive High Voltage from Faulty High Voltage Board.Detector Replaced | |
ML17303B078 | 22 April 1988 | Special Rept 2-SR-88-003:on 880324,radioactive Gaseous Effluent Monitor Inoperable for More than 72 H.Authorized Work Document Issued to Troubleshoot & Rework/Replace Components to Correct Low Flow Alarms | |
ML17303B079 | 22 April 1988 | Special Rept 2-SR-88-004:on 880324,radioactive Gaseous Effluent Monitors Inoperable for More than 72 H.Authorized Work Document Issued to Implement Plant Change Package for Monitor RU-143 & to Change Default Parameters | |
ML17303B133 | 18 May 1988 | Special Rept 2-SR-88-005:on 880509,inservice Insp of Steam Generators Completed Resulting in Plugging of 34 Tubes in Steam Generator 1 & 27 Tubes in Steam Generator 2.Complete Results of Insp Will Be Provided within 12 Months | |
ML17304A219 | 15 June 1988 | Special Rept 3-SR-88-001:on 880516,radiation Monitoring Unit Inoperable for Greater than 72 H.Caused by Flow Totalizer Exhibiting Offset W/No Flow Through Monitor.Flow Transducer & Totalizer Replaced.Request for Evaluation Submitted | |
ML17304A259 | 11 July 1988 | Special Rept 1-SR-88-005:fire Occurred in Auxiliary Transformer Resulting in Loss of Nonclass 1E Ac Power.Fire Extinquished & Notification of Unusual Event Terminated.When Bus Energized,Second Fire Started.Plant Remained Stable | |
ML17304A341 | 10 August 1988 | Special Rept 3-SR-88-003:on 880714,radioactive Gaseous Effluent Monitors Declared Inoperable for Greater than 72 H. Caused by Incorrect Diodes Installed on High Voltage Circuit Board.Voltage Board Replaced & Test Procedure Revised | |
ML17304A343 | 10 August 1988 | Suppl 1 to Special Rept 2-SR-87-024:on 870918,72 H Limit for Inoperability Exceeded for high-range Noble Gas Monitor. Caused by Poor Design for Check Source Circuitry.Design Change Prepared for Implementation to Eliminate Circuit | Grab sample |
ML17304A366 | 22 August 1988 | Special Rept 3-SR-88-004:on 880725,reactor Vessel Water Level Sys Channel B Declared Inoperable.Caused by Previous Failures on 880219 & 0706 of Malfunctioning Heated Junction Thermocouples Mechanism.Channel Will Be Restored | Reactor Vessel Water Level Post Accident Monitoring |
ML17304A411 | 24 August 1988 | Special Rept 1-SR-88-006:on 880817,30-day Action Statement for Operability of Seismic Monitoring Sys Exceeded.Caused by Seimic Accelerometer Trigger Card (Setpoint) Out of Calibr. Card Recalibr.Sys Returned to Operable Status on 880818 | |
ML17304A504 | 31 August 1988 | Special Rept 1-SR-88-007:on 880815,radiation Monitoring Unit Inoperable for Greater than 72 H,Per Tech Specs 6.9.2 & 3.3.3.8.Channel Source Rod Arm Slide Cam Was Binding on Metal Canister.Slide Cam Reworked to Prevent Binding | |
ML17304A508 | 8 September 1988 | Special Rept 3-SR-88-005:on 880818,high Range Noble Gas Monitor RU-142 Inoperable for Greater than 72 H,Per Tech Spec 3.3.3.8,Action 42(b).Approved Work Document Initiated to Troubleshoot Cause of Monitor Malfunction & Rework | |
ML17304A555 | 12 September 1988 | Suppl to Special Rept 1-SR-85-010:on 850509,emergency Diesel Generators a & B Failed to Attain Required Voltage,Frequency & Speed.Caused by Inadequate Design of Heater Control Sys. Mod to Replace Temp Control Valves Implemented | |
ML17304A637 | 11 October 1988 | Special Rept 2-SR-88-002:on 880912,radiation Monitor Inoperable for Greater than 72 H.Preplanned Alternate Sampling Program Initiated to Monitor Fuel Bldg Ventilation Sys When Needed | |
ML17304A678 | 26 October 1988 | Special Rept 2-SR-88-007:on 881001,condenser Vacuum Pump/ Gland Seal Exhaust Low & high-range Monitors Declared Inoperable for Greater than 72 H.Caused by Defective Mylar Window on Detector.Replacement Detector Installed | |
ML17304A726 | 7 November 1988 | Special Rept 2-SR-88-006:on 881014,72 H Limit for Operability Exceeded for Containment Bldg Atmosphere Process Monitor.Caused by Error in Procedure.Procedure Corrected | |
ML17304A734 | 7 November 1988 | Special Rept 3-SR-88-007:on 881024,reactor Vessel Water Level Sys Declared Inoperable for More than 48 H.Caused by Malfunction in Communications Board.Board Replaced & Installed on 881028 | Reactor Vessel Water Level |
ML17304A776 | 22 November 1988 | Special Rept 1-SR-88-008:on 881113,Tech Specs Violated. Caused by Loose Part Detection Channel Being Inoperable for More than 30 Days Due to Problems W/False Alarms.Sys Will Be Monitored Once Per 24 H & Investigation Initiated | |
ML17304A790 | 6 December 1988 | Special Rept 23-SR-88-008:on 881108,7 Day Limit for Inoperability of Post Accident Sampling Sys Exceeded.Caused by Inadequate Flow Measuring Unit.Inlet Isolation Valve Reinstalled | |
ML17304A859 | 30 December 1988 | Special Rept 3-SR-88-008:on 881205,high-range Effluent Monitor RU-142 Declared Inoperable as Result of Condenser Evacuation Sys low-range Noble Gas Effluent Monitor Inoperable Due to Erratic Flow.Caused by Water Buildup | Grab sample |
ML17304A863 | 9 January 1989 | Special Rept:On 890103,facility Suffered Complete Loss of Offsite Power Due to Lightning Striking Circuits Between ESF Svc Transformers.Troubleshooting & Rework Performed & Two Primary Side Bushings Changed on Each Transformer | |
ML17304A867 | 9 January 1989 | Special Rept 2-SR-88-009:on 881206,condenser Vacuum Pump/ Gland Seal Exhaust Low & High Range Monitors Declared Inoperable Due to Intermittent Spiking on Low Range Monitor. Monitors Left Inoperable for Troubleshooting of Problem | |
ML17304B006 | 31 January 1989 | Special Rept 3-SR-89-001:on 890105,plant Vent Sys Radioactive Gaseous Effluent Monitors Inoperable for More than 72 H.Caused by Monitors Needing Corrective Maint & Design Enhancements.Monitors Restored to Svc on 890108 | |
ML17304B068 | 8 March 1989 | Special Rept 3-SR-89-002:on 890303,electrical Grid Disturbance Occurred,Causing Fault Near Devers,Ca Switchyard & Opening of Main Generator Output Breakers.Low Pressure Reactor Trip & Main Turbine Trip Also Occurred | |
ML17304B072 | 15 March 1989 | Special Rept 3-SR-89-003:on 890215,radioactive Effluent Monitor Inoperable for Greater than 72 H.Approved Work Document Initiated to Troubleshoot Cause of Inconsistent RU-141 Indication | Grab sample |
ML17304B073 | 16 March 1989 | Special Rept 1-SR-89-002:on 890215,7 Day Limit Exceeded for Inoperability of post-accident Sampling Sys Due to Valve Failing Surveillance Test.Caused by Misoperation of Bypass Valve During RCS Sampling.Sys Returned to Svc on 890308 | |
ML17304B101 | 7 April 1989 | Special Rept 1-SR-89-001:on 890306,Channel B Reactor Vessel Water Level Sys Inoperable for Period Greater than 7 Days. Approved Work Document Initiated to Determine Cause of Improper Operation of Sys.Channel Will Be Replaced | Reactor Vessel Water Level Post Accident Monitoring Temporary Modification |
ML17304B141 | 25 April 1989 | Special Rept 1-SR-89-003:on 890330,condenser Evacuation Sys High Range Effluent Monitor RU-142 Declared Inoperable for More than 72 H Due to Engineering Concerns Re Moisture in Gas Channel.Long Term Design Mods Implemented |