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| Issue date | Title | Topic | |
|---|---|---|---|
| ML20195F591 | 11 September 1998 | Special Rept:On 980812,addl Unseated Wires Were Discovered. Cause Is Unknown at Present Time.Util Evaluated Number of Unseated/Ineffective Wires & Determined Effect on Containment Structural Integrity.Commitments,Encl | |
| ML20247F771 | 8 May 1998 | Special Rept:On 980403 & 980503 Seismic Monitoring Sys Was Declared Inoperable.Caused by 5-volt Power Supply & Regulator Card Failure.Imd & Sys Engineering Are Continuing to Identify & Resolve Problems So Sys Can Be Operable | |
| ML20217D513 | 26 September 1997 | Special Rept:On 970918,moisture Content in Grease Samples Exceeded Maximum 10% by Weight.Caused by Ground Water Intrusion.Engineering Evaluation Performed & Insp of Tendons for Water Will Be Done on Annual Basis | |
| ML20149H727 | 18 July 1997 | Special Rept:On 970711,abnormal Containment of Tendon Degradation Was Noted.Cause Indeterminate.Will Perform Addl Inspections of Tendon H4ED to Monitor Apparent Addl Degradation.Calculation Re Subj Tendon Encl | |
| ML20135F332 | 4 March 1997 | Special Rept:On 970303,Braidwood Auxiliary Bldg Vent Stack Wide Range Gas Monitor Was Inoperable for Greater than Seven Days.Caused by Removing Monitoring from Operation to Perform 18-month Channel Calibr.Calibr Was Completed | |
| ML20129C819 | 8 October 1996 | Special Rept:On 960826,Unit 1 Began Receiving Loose Parts Alarm in Mcr.Caused by C Loop Cold Leg Loop Stop Isolation Valve.Se Performed by Westinghouse | |
| ML20057F396 | 8 October 1993 | Ro:On 930928,Train B DG Valid Failure Occurred,Causing Annunciators 2-22-C8 & 2-22-D6 to Alarm Simultaneously Due to Blown Fuses 27 & 29.Caused by Relay W/Shorted Circuit. Relay W/Shorted Circuit Replaced W/Bench Tested Relay | |
| ML20118B536 | 25 September 1992 | Special Rept:On 920913,auxiliary Bldg Vent Stack wide-range Gas Monitor Declared Inoperable.Caused by Need to Perform Instrument Maint Surveillance Procedure.Nuclear Work Request Generated to Replace Failed Printed Circuit Board | Grab sample |
| ML20099K294 | 18 August 1992 | Ro:On 920807,auxiliary Bldg Vent Stack wide-range Noble Gas Monitor Declared Inoperable Due to Inability to Pass Source Check.Caused by Failure of High Voltage Power Supply. Original Detector Reinstalled After Addl Failure | |
| ML20102B143 | 14 July 1992 | Special Rept:On 920610,DG 2A Output Breaker Closed, Resulting in Parallel Operation of DG 2A to Sys Grid & Causing DG Trip.Caused by Reverse Power Condition Due to Operator Error.Surveillance Successfully Completed | |
| ML20094K125 | 11 March 1992 | Ro:On 920212,diesel Generator 1A Failed to Attain Rated Speed & Voltage within 10 & Declared Inoperable.Caused by Air Leak in Air Control Sys Which Positions Fuel Racks in Full Fuel Position.Test Frequency Increased | |
| ML20086A237 | 12 November 1991 | Special Rept:On 911026,auxiliary Bldg Vent Stack wide-range Noble Gas Monitor Declared Inoperable & Removed from Svc for More than 7 Days.Caused by Need to Perform 18-month Channel Calibr.Channel Returned to Operable Status on 911107 | |
| ML20077B575 | 30 April 1991 | Special Rept:On 890724,seismic Monitoring Sys Declared Inoperable to Facilitate Relocation of Free Field Monitor. Efforts to Troubleshoot & Repair Sys Unsuccessful.Schedule for Restoration of Sys Listed | |
| ML20066F719 | 24 December 1990 | Special Rept:On 901102,sensor Channel Malfunctioned.Cause Unknown.Sensor Channel Will Be Repaired by Next Refueling Outage (Mar 1991) | |
| ML20065R821 | 13 December 1990 | RO:901114,during Performance of Monthly Operability Surveillance of Diesel Generator 2A,noted That Voltage Indication on Panel Appeared to Be Erroneous.Caused by Failure of Fuse.Fuse Replaced | |
| ML20245A861 | 14 April 1989 | Ro:On 890215,diesel Generator 1DG01KB Started in Performance of Monthly Operability Surveillance.Generator Came Up to Speed But Immediately Voltage & Frequency Indications Malfunctioned.Caused by Short in Strip Chart Recorder | |
| ML20245D872 | 14 April 1989 | Ro:On 890215,diesel Generator Voltage & Frequency Indications Malfunctioned.Caused by Blown Fuse in Strip Chart Recorder.Generator Run Manually Terminated & Fuse Replaced | |
| ML20196E234 | 29 November 1988 | Special Rept:On 881020,discovered That Sensor Channels LM001 & LM009 Were in Low Alarm.Caused by Fraying of Insulated Fibre Jacket of Microdot Connector Cable.Sensor Channels Replaced | |
| ML20154E893 | 9 September 1988 | Ro:On 880803,diesel Generator 2A Began Losing Speed Upon Entering Test Mode During Monthly Operability Surveillance. Caused by Abnormally High Resistance in Normally Closed Test Mode Contacts of 4EX3 Relay | |
| ML20235G884 | 1 July 1987 | Special Rept:On 870614,wide Range Gas Monitor (WRGM) Failed Automatic Check Source Test on High Range detector,1PC330. Check Source Damaged During Repairs.Parts & Installation of New Check Sorce Expected to Be Completed by 870715 | |
| ML20212K460 | 3 February 1987 | Special Rept:On 870106,PORV 1RY455A Lifted for 2 S.Caused by Rapid Increase of RCS Temp When Reactor Cooling Pump 1C Started.Opening PORV Terminated Pressure Transient.On 870112,bubble Formed in Pressurizer to Prevent Recurrence | |
| ML20212H351 | 3 February 1987 | Ro:On 861209,diesel Generator 1DG01KB Output Breaker Did Not Close on Signal from Control Room.Breaker Circuitry & Linkages Inspected.Following Successful Surveillance Run, Diesel Generator Declared Operable on 861210 |