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| Issue date | Title | Topic | |
|---|---|---|---|
| 05000339/LER-1993-005 | 4 October 1993 | LER 93-005-00:on 930909,EDG Load Sequencing Timers Found Outside Setpoint Tolerence Due to Setpoint Drift.Program Established to Replace Agastat 2400/7000 Series Timer Relays w/Allen-Bradley RTC Solid State timers.W/931004 Ltr | |
| 05000339/LER-1993-002 | 12 August 1993 | LER 93-002-01:on 930416,automatic Trip Occurred Due to Malfunction in Main Generator Voltage Regulator Circuitry. Performed Insp of turbine/generator.W/930812 Ltr | |
| 05000338/LER-1990-008 | 18 June 1990 | LER 90-008-00:on 900524,discovered Design Error Where Svc Water Sys Pressures Exceeded Design Values for Anchor Piping Support on Supply Lines for Spray Hxs.Justification for Continued Operation Developed & Mods performed.W/900618 Ltr | |
| 05000338/LER-1985-026, Cancelled LER 85-026/00 | 9 April 1986 | Cancelled LER 85-026/00 | |
| 05000338/LER-1983-077, Errata to LER 83-077/03L-0,forwarding Page 2,inadvertently Omitted from Original Distribution | 17 November 1983 | Errata to LER 83-077/03L-0,forwarding Page 2,inadvertently Omitted from Original Distribution | |
| 05000338/LER-1981-090, Updated LER 81-090/99X-1:on 811214,annunciators for 20.2-hertz & 25.4-hertz Vertical Axis Channels of Containment Mat Response Spectrum Recorder Illuminated & Could Not Be Reset.Cause Unknown.Unit to Be Replaced | 4 June 1982 | Updated LER 81-090/99X-1:on 811214,annunciators for 20.2-hertz & 25.4-hertz Vertical Axis Channels of Containment Mat Response Spectrum Recorder Illuminated & Could Not Be Reset.Cause Unknown.Unit to Be Replaced | |
| 05000339/LER-1982-017, Updated LER 82-017/03X-1:on 820413,number of Containment Isolation Valves Had Unacceptable Leak Rate.Caused by Misaligned Limit Switches on Svc Water Valves & Seating Surface Degradation or Fouling on Other Valves | 2 June 1982 | Updated LER 82-017/03X-1:on 820413,number of Containment Isolation Valves Had Unacceptable Leak Rate.Caused by Misaligned Limit Switches on Svc Water Valves & Seating Surface Degradation or Fouling on Other Valves | |
| 05000338/LER-1982-017, Updated LER 82-017/03X-1:on 820408,during Full Power, Charcoal Sample Lab Analysis from Process Vent Filter Failed to Meet Testing Criteria.Caused by Natural Depletion of Charcoal.Redundant Filter Installed & Charcoal Replaced | 19 May 1982 | Updated LER 82-017/03X-1:on 820408,during Full Power, Charcoal Sample Lab Analysis from Process Vent Filter Failed to Meet Testing Criteria.Caused by Natural Depletion of Charcoal.Redundant Filter Installed & Charcoal Replaced | |
| ML20064H861 | 18 December 1978 | /03L-0 on 781204:during Pwr Reduction,Axial Flux Difference Deviated Greater than 5%;during Return to Full Pwr Afd Deviated Greater than -5%.Caused by Load Reduction Caused by Unit Being on Load Following | Power change |
| ML20064H467 | 13 December 1978 | /01T-0 on 781130:noted That Emergency Diesel Generator Battery Racks Were Improperly Installed.Caused by Failure to Perform Requested Mods | Design basis earthquake |
| ML20064G444 | 7 December 1978 | /03L-0 on 781115:Detectors a & B of Incore Movable Detector Sys Stuck in Inserted Position Due to Fouled Incore Movable Detector Guide Thimbles | |
| ML20064G454 | 5 December 1978 | /03L-0 on 781111:during Pwr Reduction,Axial Flux Difference Deviated Greater than Tech Spec Limits.Deviation Caused by Rapid Load Reduction Caused by Failure of Turbine Governor Valve 4 to Open During Test | Power change |
| ML20064G434 | 5 December 1978 | /03X-1 on 781012:during Mode 1 Opers,At 100% Pwr, Feedwater Flow Transmitter FT-1496 on Feedwater Loop C Failed Low.Caused by Blown Fuse.Fuse Subsequently Replaced | |
| ML20064G165 | 1 December 1978 | /03L-0 on 781110:during Critical Steady State Oper Alarms Showed High Steam Line Differential Pressure on Line B.Proper Bistables Tripped,Placing Plant in Safe Condition. Caused by Faulty Instru Loop Pwr Supply Card in Circuitry | |
| ML20064G176 | 1 December 1978 | /03X-1 on 780728:particulate Filter & Charcoal Filter Were Clogged.Caused by Driving Mechanism of RM-RMS-159 Filter Being Jammed | |
| ML20064F880 | 29 November 1978 | /01T-0 on 781116:Svc Water & Component Cooling Piping & Pipe Supports Not Analyzed for Thermal & Seismic Stresses.Design Personnel Utilized Wrong Svc Water Temps for Stress Analysis.Present Analysis Shows Adequate Support | |
| ML20064F733 | 27 November 1978 | /03L-0 on 781102:during Pwr Escalation,Upper Flux Deviation Alarm Was Received & Traced to a High Quadrant Pwr Tilt Ratio.Believed Cause Was Nonlinear Detector Resonse at Lower Pwr | |
| ML20064F722 | 27 November 1978 | /03L-0 on 781101:axial Flux Difference Deviated Greater than -5% from Target for One Minute.Caused by Pwr Reduction Necessitated by Problem with Cooling Fans on Main Station Transformer C | Power change |
| ML20064F726 | 27 November 1978 | /03L-0 on 781107:during 1-pt-134 Periodic Test, MOV-QS102A Would Not Return to Normal Closed Position Because of Dirty Contacts on Valve'S Torgue Switch.Contacts Were Cleaned | |
| ML20064F740 | 27 November 1978 | /03L-0 on 781101:main Steam Trip Valve 1-TV-MS-111A Was Detected Leaking Due to a Deteriorated Internal Gasket.Valve Was Isolated & Gasket Replaced | |
| ML20064F216 | 21 November 1978 | /01T-0 on 781121:inspec of Station Battery Racks Revealed That Racks Had Been Improperly Assembled & Installed During Constr.Deficiencies Will Be Corrected | |
| ML20064F204 | 21 November 1978 | /01T-0 on 781113:during Steady State Oper,It Was Discovered That Only One Seal or Barrier Exists for Spare Pipe Penetrations in Conflict W/Fsar Due to Oversight of Design Personnel.Engineering Is Analyzing It for Solution | |
| ML20064F253 | 17 November 1978 | /03l-0 on 780927:after maint,TV-BD100A,B,D & F Were Tested But Not Timed Prior to Return to Svc,Due to Personnel Error.Personnel Have Reviewed the Requirements | Stroke time |
| ML20064F235 | 17 November 1978 | /01X-0 on 781108:a Field Mod Was Made to Vessel Lower Head Insulation & the Mod Was Not Seismically Analyzed IAW FSAR Due to Personnel Error.Subsequently Analyzed by Stone & Webster & by Westinghouse | Earthquake |
| ML20064E678 | 14 November 1978 | /03L-0 on 781025:During Routine Startup Oper,Axial Flux Difference Deviated Greater than 5% from target.48 Penalty Min Accumulated.Caused by Xenon Transient Occurrence.Corrective Action:Boration by Reactor Operator | Power change |
| ML20064E442 | 13 November 1978 | /03X-1 on 780915:during Periodic Test,A Bistable (FC-1485 in Protec Channel Iv)Associated W/Hi Steamline Flow S.I.Actuation Failed to Trip,Due to Defective Bistable Card | |
| ML20064E438 | 13 November 1978 | /99X-1 on 780413:with All Rods Out at Beginning of Core Life,Hot Zero Pwr Moderator Temp Coefficient Revealed It Was More Positive than 0 Delta K/K/F in Tech Spec,Due to Positive Mtc for the all-rods-out Configuration | |
| ML20064F241 | 24 October 1978 | /03l-0 on 781024:following a Reactor Trip,The Containment Bulk Avg Temp Exceeded 105 Degrees F Tech Spec Limit Due to Steam Loss to Chilled Water Sys Vacuum Refrigeration Unit | |
| ML20064B973 | 10 October 1978 | /99X-1 on 780712:the Area Temp Monitoring Log Erroneously Recorded Excessive Temps in Battery Rooms.Cause Is Unknown | |
| ML20064B983 | 10 October 1978 | /03L-0 on 780905:a Bistable (FC-1485 in Protec Channel IV) Failed to Trip During a Periodic Test.Defective Bistable Card Was the Cause & Replaced | |
| ML20147B060 | 22 September 1978 | /03L-0 on 780830:Testing of Quench Spray Pump 1-QS-P-1B Showed Pressure Drop of Over 10psi on the Suction Line During Oper,Caused by Wooden Dam in Piping. (Encl to 7810030071) |