Semantic search
Jump to navigation
Jump to search
Issue date | Title | Topic | |
---|---|---|---|
ML20079L874 | 31 October 1991 | Special Rept 1-SR-91-003:on 910927,reactor Trip Occurred, Resulting in Opening of Turbine Control Valve & Causing Primary Sys Temp to Decrease Below 1,837 Psia.Caused by Valid Low Pressurizer Pressure.Isolation Sys Reset | |
ML20155J645 | 20 October 1988 | Special Rept 3-SR-88-006:on 881009,condenser Evacuation Sys high-range Effluent Monitor Inoperable for Greater than 72 H.Monitor Inoperable Due to Erratic Indication Caused by Loose &/Or Dirty Detector Connection.Connection Cleaned | |
ML20236G633 | 23 October 1987 | Suppls Special Rept 2-SR-86-029.On 870801,containment Bldg Atmosphere Radiation Monitor Declared Inoperable.Caused by Faulty Diaphragm in Discharge Solenoid Valve.Valve Rebuilt & Returned to Operable Status | |
ML20205N955 | 19 March 1987 | Special Rept 2-SR-87-009:on 870314,smoke Found Issuing from Heater Drain Pump B Motor.Caused by Mechanical Seal Malfunction.Motor Breaker & Space Heater Breaker Racked Out. Fire Extinguished W/Portable Co Extinguisher | |
ML20205G526 | 16 March 1987 | Special Rept 2-SR-87-002:on 870222,high-range Noble Gas Activity Monitor RU-144 Inoperable for Greater than 72 H. Caused by Maint Due to Chattering Contacts in Low Voltage Power Supply.Low Voltage Power Supply Replaced | |
ML20205E578 | 13 March 1987 | Special Rept Suppl 2-SR-87-003-01:on 870208,fire at Emergency Diesel Generator a Identified.Caused by Incorrect Implementation of Procedures for Fuel Injection Tubes, Resulting in Tube Disengagement.Fire Extinguished | |
ML20207R116 | 25 February 1987 | Special Rept 1-SR-87-009:on 870217,tubes in Steam Generators 1 & 2 Plugged,Resulting from Inservice Insp of Both.Mgt Decision to Inspect Unit 2 Found 30 Tubes Plugged in Steam Generator 1 & 21 Tubes in 2 | |
ML20207Q993 | 23 February 1987 | Special Rept 1-SR-87-005:on 870108,radiation Monitoring Units RU-145 & 146 Il Found Inoperable Due to Closed Inlet Valve HCV01.Valve Opened Immediately & Similar Valves Verified to Be in Correct Position.Procedure Revised | Time of Discovery |
ML20212D352 | 13 February 1987 | Special Rept 2-SR-87-001:on 870123,preplanned Alternate Sampling Program Initiated to Monitor Plant Ventilation Sys After Radiation Monitor Inoperable for 72 H.Cause Under Investigation.Monitor RU-144 Returned to Svc on 870124 | |
ML20211N812 | 11 February 1987 | Special Rept 2-SR-87-003:on 870208,fire Discovered at Emergency Diesel Generator A.Caused by Loose Fuel Oil Line Due to Separated Fitting That Supplies Cylinder 5.Next Rept Expected by 870309 | |
ML20211E626 | 21 January 1987 | Special Rept 2-SR-86-039:on 861224,containment Bldg Atmosphere Radiation Monitor RU-1 Declared Inoperable.Cause Unknown.Work Order Issued & Troubleshooting Commenced | |
ML20211R011 | 3 December 1986 | Special Rept 2-SR-86-037:on 861104,containment Bldg Atmosphere Monitor RU-1 Declared Inoperable Due to Generation of Filter Step Alarms.Caused by Loose Capacitor. Connector Resoldered & Channel Declared Operable on 861110 | |
ML20214V703 | 19 November 1986 | Suppl to Special Rept 1-SR-86-069:on 860611,qualified Safety Parameter Display Sys Operated W/One Channel Less than Required & Subsequently Exceeded Tech Spec Action Statement. Actual Cause Not Determined.Addl Troubleshooting Required | Post Accident Monitoring |
ML20214P876 | 19 November 1986 | Special Rept 2-SR-86-036:on 861031,containment Bldg Atmosphere Monitor RU-1 Declared Inoperable Due to Cracked Drive Belt on Monitor Pump.Caused by Normal Component Aging. Belt Replaced | |
ML20214P995 | 18 November 1986 | Special Rept 1-SR-86-097:on 861020,fuel Bldg Ventilation Sys high-range Monitor RU-146 Inoperable.Caused by Failure of low-range Monitor RU-145 Due to Microprocessor Lockup. Monitors Expected to Be Returned to Svc by End of Nov | |
ML20214P274 | 13 November 1986 | Special Rept 1-SR-86-093:on 860830 & 1015,containment Bldg Area Radiation Monitor RU-149 Declared Inoperable.Caused by Cognitive Personnel Errors.Appropriate Personnel Counseled on Proper Preparation of Tech Spec Condition Records | |
ML20214P210 | 6 November 1986 | Special Rept 2-SR-86-033:on 861011,while Unit in Mode 1,fuel Bldg Ventilation Sys High Range Monitor Inoperable for More than 72 H.Caused by Failure of Channel 2 Detector Due to Normal Component Aging of Integral Tubing.Detector Replaced | |
ML20213G696 | 31 October 1986 | Special Rept 2-SR-86-032:on 861002,containment Bldg Atmosphere Particulate Channel RU-1 Declared Inoperable After Finding Low Particulate Readings Compared to Grab Sample Results.Caused by Inadequately Sealed Gasket | Grab sample |
ML20211J755 | 30 October 1986 | Special Rept 2-SR-86-031:on 861001,72 H Action Statement Exceeded for Operability of Noble Gas Activity Monitor RU-142.Monitor Declared Inoperable on 860929.Caused by burned-out Led Diode.Monitor Reworked & Returned to Svc | |
ML20215N399 | 22 October 1986 | Special Rept 2-SR-86-030:on 860924,containment Bldg Atmosphere Particulate Channel Declared Inoperable.Computer Experienced Spurious Memory Losses.Surveillance Test Performed & Channel Returned to Svc | |
ML20215K762 | 13 October 1986 | Special Rept 1-SR-86-089:on 860911 & 14,fuel Bldg Ventilation Sys high-range Monitor Ru-146 Declared Inoperable for More than 72 H.Caused by Inoperable Monitor Ru-145 on 860911 Due to Spurious Indications | |
ML20211C854 | 9 October 1986 | Special Rept 1-SR-86-085:on 861006,safety Injection Actuation Signal & Assumed Safety Injection Flow Into RCS Initiated.Caused by Unstable Feedwater Control Sys Operation.Evaluation in Progress | |
ML20203N257 | 10 September 1986 | Suppl 2 to Special Rept 1-SR-85-018:on 850925,condenser Evacuation Sys high-range Monitor RU-142 Inoperable for More than 72 H Due to Failure in low-range Monitor RU-141.New Isolated Grounding Sys Will Be Installed After 860601 | |
ML20203N365 | 7 September 1986 | Suppl 1 to Special Rept 2-SR-86-008:on 860331,condenser Evacuation Sys high-range Monitor RU-142 Inoperable for More than 72 H Due to Failure of low-range Monitor RU-141. Caused by Moisture Trapped in Process/Sample Flow Media | |
ML20214P014 | 4 September 1986 | Special Rept 2-SR-86-028:on 860809,action Statement for Operability of Main Steam Line Effluent Monitor RU-139 A/B Exceeded.Caused by Communication Problem W/Radiation Monitor Minicomputer.Cause Undetermined Due to Random Malfunction | |
ML20214N937 | 3 September 1986 | Special Rept 2-SR-86-029:on 860801,containment Bldg Atmosphere Radiation Monitor RU-1 Declared Inoperable. Possibly Caused by Defective Suction Pump & Faulty Diaphragm.Pump Replaced & Valve Rebuilt | |
ML20206N811 | 8 August 1986 | Special Rept 1-SR-86-053:on 860806,startup Transformer NAN-X03 Tripped,Resulting in Loss of Power to Four Unit 1 & Five Unit 2 Buses.Cause Unknown.Esf Actuation Signals Reset & Diesel Generators Unloaded & Shut Down | |
ML20205G007 | 6 August 1986 | Special Rept 2-SR-86-018:on 860705,reactor Vessel Water Level Sys Inoperable for More than 7 Days.Caused by Connection of Channel B Heated Junction Thermocouples in Reverse Order.Connection Corrected | Reactor Vessel Water Level Post Accident Monitoring |
ML20214J926 | 26 July 1986 | RO 2-SR-86-021:on 860626,radiation Monitoring Unit Declared Inoperable on 860623 Not Restored to Operable Status within 72 H.Possibly Caused by Anomaly in Power Supply Voltage. Monitor Reset | |
ML20206R389 | 7 July 1986 | Special Rept 1-SR-86-021:on 860513 & 0616,Units 1 & 2, Respectively,Experienced Excessive Alarms on Steam Generator Sensors.Caused by Improper Alarm Setpoint Calibr.Work Request Generated to Check Setpoints During Shutdown | |
ML20202D690 | 3 July 1986 | Special Rept 1-SR-86-069:on 860611,five Inoperable Heated Junction Thermocouple Sensors Not Returned to Svc within 7 Days.Cause of Inoperable Sensors Not Determined.Addl Troubleshooting Required | Post Accident Monitoring |
ML20206R758 | 23 June 1986 | Special Rept 1-SR-86-068:on 860613,30-day Action Statement for Operability of Seismic Monitoring Sys Exceeded.Caused by Defective Switch Card Discovered During Seismic Monitoring Calibr Test.Switch Card Repaired | |
ML20199B315 | 3 June 1986 | Special Rept 1-SR-86-049:on 860505,during Deenergization of Train B Balance of Plant/Esfas for Module Replacement Power Loss to Shutdown Cooling Loop & Battery Chargers Occurred. Caused by Inadvertent Grounding of Wire.Power Restored | |
ML20198S504 | 30 May 1986 | Special Rept 2-SR-86-015:on 860525,reactor Trip Initiated by Reactor Protection Sys as Result of Low Level Condition in Steam Generator 1.Subsequent Depressurization of Steam Generators Resulted in ESF Initiation | |
ML20210V220 | 27 May 1986 | Special Rept 1-SR-86-042:on 860428,nonvalid Emergency Diesel Generator Tripped During Troubleshooting.Caused by Improper Temporary Clamp Reducing Cable Length.Clamp Removed | Scaffolding |
ML20198P998 | 21 May 1986 | Special Rept 2-SR-86-014:on 860421,discovered That Unit Potentially Exceeded Time Limits for Action Statement 3 of Tech Spec 3.3.1.Tech Spec 3.0.3 Exited 15 Minutes After Entry & Event Terminated | |
ML20198Q326 | 19 May 1986 | Special Rept 1-SR-86-033:on 860417,during Surveillance Testing,Emergency Diesel Generator Train a Tripped on Overspeed Condition.Caused by Deflection of Air Intake Overspeed Butterfly Valve Disk to Fully Open Position | |
ML20203Q025 | 25 April 1986 | Special Rept 2-SR-86-008:on 860331,72 H Action Statement for Operability of Condenser Evacuation Sys high-range Radiation Monitor RU-142 Exceeded.Caused by Moisture Trapped in Process/Sample Flow Media.Moisture Trap Installed | |
ML20210L130 | 18 April 1986 | Supplemental Special Rept 1-SR-85-035:on 851224,containment high-range Radiation Monitor RU-149 Declared Inoperable Due to Spurious High & Alert Radiation Alarms.Caused by Low Resistance in Radiation Monitoring Unit Cable | Scaffolding |
ML20210K716 | 18 April 1986 | Special Rept 1-SR-86-016:on 860402,diesel Generator a Tripped on Overspeed & Declared Inoperable.Caused by Misaligned Overspeed Combustion Air Indication Switch.Slots Cut Into Switch Mounting Bracket & Switch Aligned | |
ML20210K694 | 16 April 1986 | Supplemental Special Rept 1-SR-85-032:on 851128,72 H Action Statement for Operability of Containment high-range Monitor RU-148 Exceeded.Caused by Intermittent Low Resistance in Detector Cable Inside Containment.Cable to Be Replaced | |
ML20141F261 | 4 April 1986 | Special Rept 1-SR-86-011:on 860306,diesel Generator a Failed to Start within 10 as Required by Tech Spec 4.8.1.1.2.a. Caused by Seized Diesel Generator Governor Output Shaft. Governor Replaced | |
ML20210G550 | 17 March 1986 | Supplemental Special Rept 1-SR-85-018:on 850925,condenser Evacuation Sys high-range Monitor (RU-142) Inoperable for More than 72 H.Caused by low-range Monitor Being Declared Inoperable Due to Loss of Stored Data | |
ML20154Q855 | 25 February 1986 | Special Rept 1-SR-86-007:on 860203,during Performance of Surveillance Test 41ST-1DG02,diesel Generator B Overspeed Trip Occurred.Caused by Fiber Optic Optical Transistor Failure.Fiber Optic Printed Circuit Board Replaced | |
ML20137Y406 | 24 February 1986 | Special Rept (2-SR-86-005):on 860125,Tech Spec Action Statement for Operability of Vent high-range Radiation Monitor RU-144 Exceeded.Caused by Energizing Reactor Coolant Pump W/Grounding Straps Still Attached.Procedure Revised | |
ML20137Y455 | 21 February 1986 | Special Rept (1-SR-86-003):on 860122,72 H Action Statement for Operability of Vent high-range Radiation Monitor RU-144 Exceeded.Caused by Time Spent Troubleshooting on Monitor RU-143 | |
ML20137Z228 | 21 February 1986 | Special Rept 1-SR-86-005:on 860122,condensor Evacuation Sys high-range Monitor Inoperable for More than 72 H.Caused by Spurious Indication of High Radiation.Investigation Continuing | |
ML20153D981 | 14 February 1986 | Ro:On 860211,post-accident Sampling Sys Declared Inoperable Due to Confirmatory Testing of Pump Components.Preplanned Alternate Sampling Program Will Be Submitted | |
ML20137V148 | 10 February 1986 | Special Rept 1-SR-86-006:on 860203,safety Injection Actuation,Containment Isolation Actuation & Main Steam Isolation Signals Occurred Due to Reactor Trip.Caused by Low Level in Steam Generator 2.Plant Parameters Stabilized | |
ML20137W054 | 23 January 1986 | Special Rept 1-SR-85-035:on 851227,72 H Action Statement for Operability of Containment high-range Radiation Monitor (RU-149) Exceeded.Monitor Declared Inoperable on 851224 Due to Spurious Detector Failure Alarms |