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| Issue date | Title | Topic | |
|---|---|---|---|
| ML20045D301 | 18 June 1993 | Special Rept 93-002:on 930521,invalid Failure of Sdg 12 Occurred Due to False High Jacket Water Temp Signal, Generated by Faulty Jacket Water Temp Switch.Faulty Switch Replaced | |
| ML20044H076 | 2 June 1993 | Special Rept 93-001:on 930504,trip Signal Occurred During Performance of Monthly Functional Test for Standby DG 11. Caused by Inadequate Work Instructions.Surveillance Procedure Will Be Revised to Address Probe Magnetic Bars | |
| ML20042G871 | 8 May 1990 | Ro:On 900412,groundwater Level Reading Taken from Dewatering Well 8 Exceeded 109 Ft Mean Sea Level Design Basis.Caused by Incorrect Level Sensor Probe Setting.Probe Adjusted Using New Setpoint Data to Cycle Dewatering Well at 108.4 Ft | |
| ML19354E685 | 17 January 1990 | Special Rept 89-009-00:on 891218,diesel Generator 11 Failed. Potential Transformer Fuse Holders Found Loose.No Obvious Cause of Event Identified.Diesel Retested Satisfactorily W/O Recurrence of Original Incident | |
| ML19325E356 | 24 October 1989 | Special Rept 89-008-0:on 891010,instrument Channel Inoperable for More than 72 H.Caused by Turbine Bldg Exhaust Accident Range Monitor Declared Inoperable After Sample Flow Calculations Could Not Be Completed Due to Leaking Valve | Grab sample |
| ML20024F478 | 29 August 1983 | RO 83-072/0:on 830729,30 & 0814-16,control Room Air Temp Exceeded Tech Spec Limit.Caused by Lack of Operating Control Room HVAC Subsystems & Low Freon in Subsystem B, Respectively.No Corrective Action Stated | |
| ML20024D043 | 27 July 1983 | RO 83-059/0:on 830620,fire-rated Doors OC412 & OC712 to Reactor Protection Sys Motor Generator Set Rooms Blocked Open to Aid Room Ventilation.Fire Watch Established.Expected Restoration Date of Doors Is 830731 | Fire Watch |
| ML20024C331 | 27 June 1983 | RO 83-052/0:on 830523,listed Fire Rated Penetrations Opened to Implement Design Change Packages.Hourly Fire Watches Established & Will Be Maintained Until Penetrations Resealed by 830801 | |
| ML20024C261 | 27 June 1983 | Updated RO 83-027/1:on 830321,during Seismic Monitoring Sys Functional Test,Operation of Chart Recorders & Spectrum Analyzers Unacceptable.Caused by Faulty Circuit Card.Card Replaced.Sys Restored on 830519 | |
| ML20024C332 | 24 June 1983 | RO 83-050/0:on 830519,floor Penetration CE-37G in Control Bldg Upper Cable Room Opened to Rework Cable Tray Hanger. Fire Watch Established Until Penetration Sealed on 830603. Seven-day Limiting Condition for Operation Exceeded | Fire Watch |
| ML20024C276 | 24 June 1983 | RO 83-049/0:on 830526,halon Bottle 2 in Panel P936 Discharged Until Empty.Hourly Fire Watch Established Pending Bottle Replacement.Limiting Condition for Operation to Be Maintained.Next Rept Will Be Submitted by 830731 | Hourly Fire Watch |
| ML20024C115 | 22 June 1983 | RO 83-047/0:on 830508 & 11,fire Protection Halon Sys for Two Control Room Back Panels Failed Surveillances.Caused by Inability to Meet Tolerance Specified for Full Charge Pressure.Surveillance Procedure Revised | |
| ML20023D558 | 9 May 1983 | RO 83-029/0:on 830422,50-meter Wind Direction Reading Did Not Agree w/10-meter Reading.Caused by Incorrectly Wired New Sensors Located in Design Change Package 82-502.Wiring Diagram Corrected | |
| ML20023B638 | 28 April 1983 | RO 83-025/0:on 830322,fire Rated Penetrations Opened to Implement Design Change Packages.Hourly Fire Watches Established within 1 H & Will Be Maintained for Duration of Planned Maint Activities.Work to Be Completed by 830610 | |
| ML20023B502 | 28 April 1983 | RO 83-026/0:on 830327,security Access Card Reader to Fire Door 1A318,Elevation 166 Ft,In Auxiliary Bldg Malfunctioned. Caused by Fire Door Blocked to Allow Personnel Access.Card Reader Reworked & Returned to Svc 830405 | Hourly Fire Watch |
| ML20028A531 | 10 November 1982 | Ro:On 820813,Channel a Tripped & HPCS Initiated on False Low Level Signal.Caused by Failure to Follow Procedures.On 820814,HPCS Initiated by True Low Reactor Water Level Signal from B21-N073 L&R.Procedures Developed to Correct Problems |