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Issue date | Title | Topic | |
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ML17299A309 | 10 May 1985 | Ro:On 850505,plant Security Sys Did Not Return to Svc as Expected After Planned Electrical Outage.Security Compensatory Measures Established Per Station Security Plan. Event Determined Not Reportable Under 10CFR73.71 | |
ML17299A356 | 24 May 1985 | Special Rept:On 850424,72-h Action Statement for Operability of Containment Area Radiation Monitors RU-148 & RU-149 Exceeded.Justification for Interim Operation Submitted by Licensee.Detectors Will Be Installed by 850731 | |
ML17299A367 | 25 May 1985 | Special Rept:On 850425,diesel Generator a Determined Inoperable Due to Start Failure While Testing Oscillographic Device.Caused by Oil in Control Air Sys.Fuel Rack Cylinder Shaft Thoroughly Cleaned.Generator Tested Satisfactorily | |
ML17299A384 | 10 June 1985 | Special Rept Re 850509 Failure of Diesel Generator to Start. Caused by Failure of turbo-charger Manifold Temp Control Valve in Vent to Atmosphere Position & Major Starting Air Sys Leak.Control Air Supply Plugged to Temp Control Valves | Temporary Modification |
ML17299A413 | 5 June 1985 | Special Rept:On 850426,72 H Action Statement for Inoperability of Condenser Evacuation Sys high-range Noble Gas Activity Monitor Exceeded.Caused by Failure of Associated Sample Pump.Setpoint Adjusted | |
ML17299A429 | 25 June 1985 | Special Rept:On 850526,containment Atmosphere Radiation Monitor RU-1 Particulate Channel Declared Inoperable.Caused by Misunderstanding of Channel Operation.Radiation Protection Dept Procedures Revised | Grab sample |
ML17299A465 | 19 July 1985 | Special Rept 1-SR-85-013:on 850618,diesel Generator B Failed to Start within 10 Acceptance Criteria of Surveillance Test 41ST-1DG02.Cause Not Determined.Valves Inspected & Cleaned | |
ML17299A495 | 7 August 1985 | Special Rept 1-SR-85-014:on 850708,containment High Range Monitor RU-149 Declared Inoperable Due to Erroneous Readings.Caused by Exceeding 72 H Action Statement for Operability of Monitor.Circuit Board Replaced | |
ML17299A708 | 25 October 1985 | RO-1-SR-85-025:on 851024,reactor Trip Resulted from Low Steam Generator Level Signal Following Turbine Trip.Caused by High Pressure Pulse Initiated by Rapid Closure of Turbine Throttle.Safety Injection Signal Reset | |
ML17299A709 | 25 October 1985 | Special Rept 1-SR-85-018:on 850925,condenser Evacuation Sys High Range Monitor RU-142 Inoperable for More than 72 H. Caused by Random Loss of Stored Data.Schedule Being Developed to Resolve Problem | |
ML17299A764 | 15 November 1985 | Special Rept 1-SR-85-024 & Suppl to Special Rept 1-SR-85-018:on 851013,condenser Evacuation Sys Radiation Monitor Noble Gas Channel Declared Inoperable.Flow Rate Being Estimatd Every 4 H Per Tech Spec Table 3.3-13 | |
ML17299A856 | 2 December 1985 | Special Rept (1-SR-85-027):on 851030,diesel Generator a Failed to Start from Control Room While Performing Surveillance Test Procedure 41ST-1DG01.Caused by Faulty Fiber Optic Cable.Cable Replaced | |
ML17299A857 | 2 December 1985 | Special Rept 1-SR-85-030:on 851028,containment high-range Radiation Monitor RU-149 Inoperable for More than 72 H. Caused by Spurious High Radiation Alarms Coincident W/ Spurious Detector Failure Alarms.Addl Rept by 851230 | |
ML17300A270 | 17 July 1986 | Special Rept 1-SR-86-079:on 860712,Channel a & B Steam Generator 2 Tripped on Low Reactor Coolant Flow,Initiating Reactor Trip.Cause Under Investigation.Ler Will Be Submitted within 30 Days | |
ML17300A392 | 23 June 1986 | Corrected Special Rept 1-SR-86-071:on 860513,Unit 1 Steam Generator 1A & 2B Sensors Experienced Excessive Alarms.On 860616,Unit 2 Steam Generator 1A Sensor Emitted Spurious Alarms.Caused by Improper Alarm Setpoints | |
ML17300A712 | 20 March 1987 | Ro:On 861104,MSIV SGE-UV-1709 Opened,Causing Cooldown of Rcs.Valve Closed & Plant Stabilized.Occurrence Could Not Be Duplicated.No Problems W/Valve Identified.Removal of Fast Open Circuitry After Installation of Valves Verified | Stroke time |
ML17300A746 | 30 March 1987 | Special Rept 1-SR-87-014:on 870212,containment Bldg Area Radiation Monitor RU-148 Declared Inoperable Due to Implementation of Plant Change Package 85-01-SQ-039-00. Monitor RU-148 Returned to Svc on 870306 | |
ML17300A748 | 30 March 1987 | Special Rept 2-SR-87-007:on 870312,time Limit for Restoring Channel of Reactor Vessel Water Level Instrumentation Exceeded.Cause of Inoperability Under Investigation.Channel Expected to Be Returned to Svc at Next Refueling Outage | Reactor Vessel Water Level |
ML17300A751 | 1 April 1987 | Special Rept 1-SR-87-013:on 870130,while in Mode 5,fuel Bldg Ventilation Sys Low Range Monitor RU-145 Declared Inoperable Due to Alarms.On 870304,while in Mode 3,monitor RU-146 Declared Inoperable.No Cause Identified | |
ML17300A753 | 26 March 1987 | Special Rept 1-SR-87-011:on 870228,72 H Limit for Inoperability of High Range Noble Gas Activity Monitor RU-144 Was Exceeded.Caused by Removal of RU-144 for Testing for Associated RU-143 Monitor.Monitor Returned to Svc | |
ML17300A754 | 30 March 1987 | Special Rept 1-SR-87-010:on 870224,condenser Evacuation Sys high-range Radiation Monitors Declared Inoperable When Continuous Low Flow Alarms Received.Caused by Water in Sample Tube.Boards Replaced & Monitors Retested | |
ML17300A755 | 30 March 1987 | Special Rept 1-SR-87-012:on 870302,following Cleaning of Contacts,Diesel Generator a Failed to Start in Emergency Mode.Caused by Defective Power Resistor.Root Cause of Failure Data Sheet Initiated & Further Action Will Be Taken | |
ML17300A756 | 30 March 1987 | Special Rept 2-SR-87-006:on 870309,radiation Monitor RU-139B Continuously Alarmed Due to Erroneous High Radiation Levels. Caused by Broken Wire in Microcomputer Preamplifier. Preamplifier Replaced & Root Cause of Failure Initiated | |
ML17300A761 | 30 March 1987 | Special Rept 1-SR-87-016:on 870303,Tech Spec 3.3.3.6 Action 32 Entered Due to Inoperability of Both Channels of Reactor Vessel Water Level Instrumentation.On 870305,time for Restoring Channels to Svc Exceeded.Cause Unknown | Reactor Vessel Water Level |
ML17300A762 | 30 March 1987 | Special Rept 2-SR-87-004:on 870305,low & High Range Noble Gas Activity Monitors Inoperable for More than 72 H.Caused by Failure of Flow Control Valve Coupling to Perform Intended Function.Coupling Replaced | |
ML17300A764 | 3 April 1987 | Special Rept 2-SR-87-005:on 870308,high-range Noble Gas Activity Monitor RU-146 Inoperable for Greater than 72 H. Caused by Random Cycling Alarms to Microcomputer Software. Plant Change Request PCR 87-13-SQ-020 Initiated | |
ML17300A776 | 17 April 1987 | Special Rept 1-SR-87-015:on 870408,30-day Action Statement for Operability of Seismic Monitoring Sys Exceeded.Caused by Ribbon Cable Wire Separating from Connector.Cable Repaired | Earthquake |
ML17300A825 | 4 May 1987 | Special Rept 2-SR-87-008:on 870406,condenser Evacuation Sys Radioactive Gaseous Effluent monitors,low-range RU-141 & high-range RU-142 Declared Inoperable for Greater than 72 H. Water Found in RU-141 Due to Holes in Detector Mylar | |
ML17300A855 | 15 May 1987 | Special Rept 2-SR-87-012:on 870416,Containment Bldg Atmosphere RU-1 Declared Inoperable Due to Ground Identified in Monitor.Check for Grounds Conducted But No Grounds Found. Functional Test Performed & Monitor Returned to Operation | |
ML17300A860 | 18 May 1987 | Special Rept 1-SR-87-017:on 870419,containment Bldg Area Radiation Monitor (RU-149) Declared Inoperable Due to Spurious Detector Failure Alarms.Cause Undetermined. Surveillance Testing Conducted & RU-149 Restored | |
ML17300A867 | 18 May 1987 | Special Rept 2-SR-87-013:on 870421,process Monitor RU-1 Inoperable for More than 72 H Due to Frequent Failure Alarms.Caused by Voltage Spikes on Grounding Sys.Mod Initiated to Replace Moving Filter Assembly W/Fixed Filter | |
ML17300A868 | 22 May 1987 | Special Rept 2-SR-87-014:on 870426,radioactive Gaseous Effluent Monitors RU-144 Inoperable for More than 72 H. Caused by Test Performance & Subsequent Gm Detector Failure. Monitor Will Be Returned to Svc by 870529 | Temporary Modification |
ML17300A941 | 22 June 1987 | Special Rept 2-SR-87-018:on 870523,high & Low Range Noble Gas Activity Monitors Inoperable for Greater than 72 H. Caused by Defective Amplifier Displacement Card Which Caused Low Readings.Card Replaced | |
ML17300A979 | 3 August 1987 | Special Rept 2-SR-87-023:on 870717,condenser Vacuum Pump/ Gland Seal Exhaust Monitors Inoperable for Greater than 72 H.Caused by Broken Directional Wire.Mod/Design Enchancement Currently Being Evaluated.Monitors Restored | |
ML17300B037 | 1 September 1987 | Special Rept 2-SR-87-022:on 870828,unusual Event Declared Due to Release in Excess of 6.62 E-4 Mci Per Cubic Centimeter.Cause Under Investigation.Corrective Action Will Be Developed Based on Investigation Results | |
ML17300B068 | 14 October 1987 | Special Rept 2-SR-87-024:on 870915,fuel Bldg B Vent Exhaust Low & High Range Monitors Declared Inoperable & Placed in Bypass Due to Problems W/Recurrent Voltage Spiking & False Background Readings.Engineering Evaluation Underway | Grab sample |
ML17300B134 | 14 December 1987 | Special Rept 1-SR-87-025:on 871205,insp Resulted in Plugging of II Tubes in Steam Generator 1 & One Tube in Steam Generator 2 | |
ML17300B137 | 14 December 1987 | Special Rept 1-SR-87-024:on 871120,plant Vent high-range Gaseous Activity Monitor RU-144 Inoperable for More than 72 H.Caused by Detector Aging.Detector Replaced & Calibr | |
ML17300B156 | 24 December 1987 | Special Rept 2-SR-87-029:on 871126,high Range Noble Gas Monitor (RU-142) Found Inoperable for More than 72 H.Caused by Water in RU-141 Sample Line.Moisture Traps Will Be Installed in Sample Lines During Next Refueling Outage | Grab sample |
ML17300B182 | 25 January 1988 | Special Rept 3-SR-87-006:on 880117,loose-part Instrumentation Inoperable for More than 30 Days.Calibr Will Be Performed by End of First Outage.Periodic Audio Check Will Be Performed Until Instrument Operable | |
ML17300B209 | 16 February 1988 | Special Rept 1-SR-88-001:on 880122,72 H Limit for High Range Noble Gas Monitor RU-142 Inoperability Exceeded.Caused by Defective Low Voltage Power Supply for RU-142 Microcomputer. Replacement Power Supply Installed & Calibr | |
ML17300B231 | 28 December 1989 | Special Rept 2-SR-89-010:on 891124,Tech 3.3.1,Action 28 Violated.Caused by 7-day Limit of Initiation of Preplanned Alternate Sampling Program Exceeded.Preventive Maint Completed.Leaking Valves Replaced & Pump Ordered | |
ML17300B232 | 21 December 1989 | Suppl 1 to Special Rept 3-SR-89-003:on 890215,72 H Limit for Inoperability of Condenser Evacuation Sys high-range Effluent Monitor (RU-142)exceeded.Design of Subj Evacuation Sys Reviewed & Addl Electric Resistance Heating Installed | Grab sample |
ML17300B233 | 23 December 1989 | Suppl to Special Rept 3-SR-89-006:on 890812,radiation Monitors RU-145 & RU-146 Exceeded 72 H Limit for Returning Monitors to Operable Status.Caused by Malfunction of Monitor RU-146 Resulting in Loss of Capability to Monitor Effluents | |
ML17300B234 | 23 December 1989 | Special Rept 2-SR-89-008:on 891124,gaseous Effluent Monitors RU-142 & RU-144 Taken Out of Svc & Declared Inoperable for More than 72 H to Implement Site Mod.Caused by Use of Rectifier in Power Supply Circuit.Site Mod Completed | |
ML17300B239 | 28 December 1989 | Special Rept 2-SR-89-004,Suppl 1:on 890330 & 0406,PASS Inoperable for More than 7 Days.Caused by Planned Isolation of Demineralized Water Supply to Pass.On 890331,temporary Mod Approved to Isolate Demineralized Water Sys | Temporary Modification |
ML17303A426 | 8 June 1987 | Special Rept 2-SR-87-015:on 870509,containment Area Monitor Channel a Inoperable for Greater than 72 H.Caused by Repairing Single Channel Area Monitor Board.Analysis Begun to Determine Cause of Board Failure on 870506 | |
ML17303A427 | 8 June 1987 | Special Rept 2-SR-87-016:on 870509,radioactive Gaseous Effluent Monitor Exceeded 72 H Limit for Operability.Caused by Maint of Low Flow Alarm.Surveillance Test Performed & Monitor Declared Operable on 870512 | |
ML17303A428 | 8 June 1987 | Special Rept 1-SR-87-019:on 870504,radiation Monitor Declared Inoperable Due to Spurious Detector Failure Alarms. Cause of Alarms Unknown.Monitor Returned to Operability After Completion of Surveillance Testing | |
ML17303A429 | 8 June 1987 | Special Rept 3-SR-87-001:on 870514,high Range Noble Gas Activity Monitor RU-144 Inoperable for Greater than 72 H. Caused by Low & High Range Plant Vent Monitors Being Taken Out of Svc on 870511 for Implementation of Change Package |