Pages that link to "05000311/LER-2016-001, Regarding AFW Loop Response Time Exceeded Technical Specifications"
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The following pages link to 05000311/LER-2016-001, Regarding AFW Loop Response Time Exceeded Technical Specifications:
Displayed 11 items.
- 05000311/LER-2016-001 (redirect page) (← links)
- 05000311/LER-2010-003 (← links)
- 05000311/LER-2002-002 (← links)
- 05000311/LER-2001-004 (← links)
- 05000311/LER-2001-003 (← links)
- 05000311/LER-2001-002 (← links)
- LR-N16-0068, LER 16-001-00 for Salem, Unit 2, Regarding AFW Loop Response Time Exceeded Technical Specifications (redirect page) (← links)
- LR-N16-0068 (redirect page) (← links)
- 05000311/LER-1982-052, Forwards LER 82-052/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-049, Forwards LER 82-049/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-050, Forwards LER 81-050/03X-1.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-048, Forwards LER 82-048/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-042, Forwards LER 82-042/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-044, Forwards LER 82-044/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-046, Forwards LER 82-046/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-045, Forwards LER 82-045/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-041, Forwards LER 82-041/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-039, Forwards LER 82-039/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-037, Forwards LER 82-037/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-040, Forwards LER 82-040/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-129, Forwards LER 81-129/03X-1.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-021, Forwards LER 82-021/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-022, Forwards LER 82-022/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-020, Forwards LER 82-020/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-038, Forwards LER 82-038/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-035, Forwards LER 82-035/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-036, Forwards LER 82-036/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-031, Forwards LER 82-031/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-029, Forwards LER 82-029/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-033, Forwards LER 82-033/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-032, Forwards LER 82-032/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-120, Forwards LER 82-120/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-119, Forwards LER 82-119/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-110, Forwards LER 82-110/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-107, Forwards LER 82-107/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-116, Forwards LER 82-116/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-102, Forwards LER 82-102/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-093, Forwards LER 82-093/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-088, Forwards LER 82-088/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-094, Forwards LER 82-094/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-090, Forwards LER 82-090/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-096, Forwards LER 82-096/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-095, Forwards LER 82-095/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-084, Telecopy Message of LER 82-084/01P:on 820829,svc Water Leak on Containment Fan Coil Unit 23 Discovered.Leak Isolated.No Cause Stated.Investigation in Progress (← links)
- 05000311/LER-1983-001, Forwards LER 83-001/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-153, Forwards LER 82-153/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-152, Forwards LER 82-152/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-150, Forwards LER 82-150/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-148, Forwards LER 82-148/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-147, Forwards LER 82-147/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-015, Supplemental LER 82-015/03X-1:on 820221,discovered That Reactor Coolant Leak Rate Surveillance 4.4.7.2.d Due 820220 Not Performed Because Plant Had Not Been in steady-state Condition Due to 820219 Reactor Trip (← links)
- 05000311/LER-1981-089, Supplemental LER 81-089/03X-1:on 810817,during Routine Wear & Alignment Check,Auxiliary Feedwater Pump 23 Linkage Between Trip Mechanism & Valve Found Loose.Caused by Loose Bolts.Bolts Tightened (← links)
- 05000311/LER-1982-144, Forwards LER 82-144/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-140, Forwards LER 82-140/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-074, Corrected LER 82-074/01T-0:on 820813,control Operator Discovered Increased Leakage to Containment Sump.Caused by Coil Failures Due to Silt Particles in Svc Water.Leak Repaired by Blanking Flanges (← links)
- 05000311/LER-1982-104, Forwards LER 82-104/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-073, Forwards LER 82-073/01T-0 (← links)
- 05000311/LER-1981-002, Forwards LER 81-002/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-086, Forwards LER 82-086/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-109, Forwards LER 82-109/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-105, Forwards LER 82-105/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-097, Forwards LER 82-097/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-103, Forwards LER 82-103/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-012, Forwards LER 82-012/03X-1.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-098, Forwards LER 82-098/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-061, Forwards LER 82-061/03X-1.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-100, Forwards LER 82-100/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-099, Forwards LER 82-099/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-101, Forwards LER 82-101/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-091, Forwards LER 82-091/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-081, Forwards LER 82-081/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-080, Forwards LER 82-080/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-106, Forwards LER 81-106/03X-1.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-004, Forwards LER 82-004/03X-1.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-071, Forwards LER 82-071/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-078, Forwards LER 82-078/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-021, Forwards LER 81-021/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-029, Forwards LER 81-029/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-019, Forwards LER 81-019/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-060, Forwards LER 82-060/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-075, Forwards LER 82-075/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-047, Forwards LER 82-047/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-043, Forwards LER 82-043/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-069, Forwards LER 82-069/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-068, Forwards LER 82-068/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-064, Forwards LER 82-064/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-063, Forwards LER 82-063/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-062, Forwards LER 82-062/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-067, Forwards LER 82-067/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-065, Forwards LER 82-065/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-066, Forwards LER 82-066/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-059, Forwards LER 82-059/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-056, Forwards LER 82-056/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-057, Forwards LER 82-057/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1983-008, Forwards LER 83-008/99X-0.Detailed Event Anaysis Encl (← links)
- 05000311/LER-1983-003, Forwards LER 83-003/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-143, Forwards LER 82-143/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-139, Forwards LER 82-139/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-138, Forwards LER 82-138/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-142, Forwards LER 82-142/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-136, Forwards LER 82-136/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-133, Forwards LER 82-133/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-134, Forwards LER 82-134/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-132, Forwards LER 82-132/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-135, Forwards LER 82-135/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-108, Forwards LER 82-108/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-106, Forwards LER 82-106/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-085, Forwards LER 82-085/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-130, Forwards LER 82-130/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-131, Forwards LER 82-131/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-127, Forwards LER 82-127/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-129, Forwards LER 82-129/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-128, Forwards LER 82-128/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-124, Forwards LER 82-124/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-123, Forwards LER 82-123/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-121, Forwards LER 82-121/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-122, Forwards LER 82-122/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-072, Supplemental LER 82-072/03X-1:on 820820,during Surveillance Testing,Discovered That Reactor Trip Breaker B Would Not Trip.Caused by Binding of Undervoltage Coil Solenoid.Coil Replaced & Breaker Reinstalled (← links)
- 05000311/LER-1982-002, Supplemental LER 82-002/03X-1:on 820111,battery Charger 2A1 Tripped.Charger Tripped Again Upon Resetting Breaker.Caused by Difference Between Battery & Battery Charger Voltages. Operating Instructions Revised to Adjust Float Vo (← links)
- 05000311/LER-1982-115, Forwards LER 82-115/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-114, Forwards LER 82-114/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-118, Forwards LER 82-118/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-117, Forwards LER 82-117/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-017, Supplemental LER 82-017/03X-1:on 820228,svc Water Flow Indicated Zero Upon Starting Containment Fan Coil Unit 22 (Cfcu).On 820301,svc Water Flow to Cfcu 23 Less than Required 2,500 Gpm.Caused by Stuck Valve (← links)
- 05000311/LER-1982-001, Supplemental LER 82-001/03X-1:on 820110,steam Generator 24 Pressure Channel 4 Failed High.Caused by Ventilation Damper Stuck Open,Freezing Pressure Sensing Line.Damper Freed, Exercised & Closed (← links)
- 05000311/LER-1983-017, Supplemental LER 83-017/03X-1:on 810515,during Startup & Cycle 1 Operations,Leakage Past Pressurizer PORVs & Pressurizer Overpressure Protection Sys Values Observed. Cause Not Stated.Porvs Modified (← links)
- 05000311/LER-1983-007, Telecopy Message of LER 83-007/01P:on 830218,two 1,000-kip Steam Generator Snubbers Failed to Meet Lockup & Bleed Rate Velocity Requirements.Cause Not Stated.Investigation Continuing.Detailed Rept to Be Submitted in 14 Days (← links)
- 05000311/LER-1982-137, Forwards LER 82-137/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1983-023, Corrected LER 83-023/03L-0:on 830117-0418,seven Containment Isolation Valves Experienced Leakage Rates Greater than Max Range of Test Equipment.Total Containment Type B & C Leakage Could Not Be Demonstrated.Valves Repaired (← links)
- 05000311/LER-1983-015, Forwards LER 83-015/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1983-012, Forwards LER 83-012/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1983-013, Forwards LER 83-013/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-083, Supplemental LER 82-083/03X-1:on 820812,during Routine Surveillance,Control Room Operator Received Low Svc Water Flow Indication on Containment Fan Coil Unit (Cfcu) 25. Caused by Oysters or Silt Restricting Cfcu Flow (← links)
- 05000311/LER-1983-083, Forwards Supplemental LER 83-083/03X-1.Detailed Event Analysis Encl (← links)
- 05000311/LER-1983-011, Forwards LER 83-011/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1983-004, Forwards LER 83-004/04L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1983-002, Forwards LER 83-002/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1984-010, Corrected LER 84-010-00:on 840423,during Startup Operations, Turbine Trip & Reactor Trip Occurred.Caused by hi-hi Level in Steam Generator 23.Feedwater Flow Nozzle Replaced & All Sys Performed as Designed (← links)
- 05000311/LER-1982-058, Forwards LER 82-058/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-025, Forwards LER 82-025/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1983-010, Forwards LER 83-010/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1983-009, Forwards LER 83-009/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-145, Forwards Corrected LER 82-145/03X-1.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-054, Forwards LER 82-054/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-050, Forwards LER 82-050/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-051, Forwards LER 82-051/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1989-011, :on 890522,determined That Tech Spec 4.3.2.1.1 Had Not Been Fully Complied With.Caused by Inadequate Design Review.Design Change Modifying Circuitry to Allow Continuity Testing Will Be Completed Next Outage (← links)
- 05000311/LER-1989-013, :on 890610,reactor Trip Manually Initiated Due to Loss of Main Condenser on High Back Pressure.Caused by External Elements & Inadequate Corrective Action.Review of Preventive Maint History Conducted (← links)
- 05000311/LER-1989-014-02, :on 890810,RMS Containment Particulate Monitor 2R12B Channel Failed & on 890823,monitor 2R41A Channel Failed.Caused by Design/Equipment Problems.Field Monitors Replaced as Needed (← links)
- 05000311/LER-1989-013-01, :on 890610,control Room Alarm Annunciated Due to High Differential Pressure & Reactor Tripped Resulting in in Five of Six Circulating Pumps Becoming Inoperable.Caused by Inadequate Corrective Action (← links)
- 05000311/LER-1989-009-01, :on 890415,RMS Plant Vent Noble Gas Monitor channel,2R41C,indicated Communication Failure.Caused by Design/Equipment Problem.Back Plane Contacts on All Modules in Local & Remote Channel Monitor Cleaned (← links)
- 05000311/LER-1989-008-02, :on 890411,reactor Trip on Steam Generator 24 lo-lo Level Occurred After Main Steam Line Isolation Valve 24MS167 Closed.Caused by Latching Relay Failure During Surveillance.Relay Replaced & Circuit Tested (← links)
- 05000311/LER-1989-006-02, :on 890329,reactor Trip Signal on Steam Generator 21 Occurred After Shutdown for Compliance W/Tech Spec Action Statement 3.7.7.b.Caused by Equipment Problems. Channel I Transmitter Recalibr (← links)
- 05000311/LER-1989-012-01, :on 890527,procedure Which Tests Response Time for Closure of Feedwater Regulating Control Valves Found Inadequate.Caused by Inadequate Procedure.Surveillance Procedure Revised to Clarify Response Time (← links)
- 05000311/LER-1989-011-02, :on 890522,failure to Fully Comply W/Tech Spec 4.3.2.1.1 Determined.Caused by Inadequate Design Review. Design Change Implemented,Modifying Circuitry to Allow Continuity Testing (← links)
- 05000311/LER-1989-010-02, :on 890520,RMS Plant Vent Noble Gas Monitor Channel Spiking Resulted in Containment purge/pressure- Vacuum Relief Sys & Waste Gas Decay Tank Vent Control Valve Isolation.Caused by Design/Equipment Problem (← links)
- 05000311/LER-1986-004, :on 860714,reactor Trip Occurred Due to Loss of Power on Vital Instrument Inverter 2B.Caused by Blown Ac Output Fuses & Open Ac Output Deion Switch.Fuses Replaced & Inverter Tested,Aligned & Returned to Svc (← links)
- 05000311/LER-1986-009-02, :on 860911,during Routine Power Operation, Reactor Trip Occurred.Caused by Electrical Fault in 4,160/ 230-volt Transformer 2F.Transformer Replaced.Investigation Continuing (← links)
- 05000311/LER-1986-011-02, :on 861117,Tech Spec 4.9.7 Re Fuel Handling Crane Overload Cutoff Not Performed within Required Time Period.Caused by Personnel error.Seven-day Insp Order Will Be Initiated When Crane in Use (← links)
- 05000311/LER-1986-010-02, :on 861016,cable Tray Penetration Located in Wall Between Auxiliary Bldg Elevation & Switchgear Room Discovered Impaired.Cause Under Investigation.Roving Fire Watch Established & Personnel Counseled (← links)
- 05000311/LER-1986-014-02, :on 861228,control Room Console Alarm Received Due to Closure of Feed Regulating Valve for Steam Generator 23.Caused by Failure of Steam/Feed Mismatch Signal Summator. Signal Summator Replaced (← links)
- 05000311/LER-1986-013-02, :on 861223,turbine Reactor Trip Occurred When Steam Reset Interlock P-7 Causing Turbine Overspeed.Caused by Failure of electro-hydraulic Control Sys Circuit Cards. Cards Replaced & Sys Tested Satisfactorily (← links)
- 05000311/LER-1987-002-01, :on 870118,wile Performing Troubleshooting on Nuclear Instrument Sys intermediate-range Channel N36, Reactor Trip Occurred.Caused by Personnel Error.Signs Placed to Caution Personnel Re Pulling Fuses (← links)
- 05000311/LER-1987-001-01, :on 870113,RHR Injection Capability to Two Cold Legs Lost.Caused by Inadequate Tech Specs.Surveillance Procedure Will Be Revised to Reflect Injection Requirements (← links)
- 05000311/LER-1986-007-02, :on 860826,reactor Trip & Safety Injection Initiated by Spurious Actuation of Bistables & Contacts, Resulting from Voltage Spike on Vital Instrument Bus 2C, Resulting in Loss of Offsite Power (← links)
- 05000311/LER-1985-022, :on 851007,reactor Trip & Safety Injection Initiated by Spurious Actuation of Bistables & Contacts Resulting from Voltage Spike on Vital Instrument Bus 2C. Caused by Technical Miswiring Receptacle (← links)
- 05000311/LER-1986-012-02, :on 861121,valve 2PR25 in as Found Condition Exhibited Leak Rate Greater than Acceptable.Caused by Buildup of Small Amount of Boron Crystals on Valve Seat. Valve Cleaned & Retested Satisfactorily (← links)
- 05000311/LER-1987-003-01, :on 870226,vendor Technicians Performing Crane Operations Made Two Lifts of Less than 200 Lb Each,Over Spent Fuel Pool,W/O Performing Surveillance Test of Crane Overload Cutoff.Caused by Personnel Error (← links)
- 05000311/LER-1986-005-02, :on 860715,during Reactor Startup,Voltage Spike Occurred on Vital Instrument Inverter 2B.Caused by Technician Connecting Leads Incorrectly.Technician Counseled.Procedure Revised (← links)
- 05000311/LER-1986-006-02, :on 860716,reactor Trip Occurred Due to Steam Generator 23 hi-hi Level.Caused by Equipment Malfunction & Personnel Error.Governor Actuator & Linkages for Steam Generator Feed Pump 21 Disassembled & Cleaned (← links)
- 05000311/LER-1986-004-02, :on 860714,reactor Tripped Due to Loss of Vital Instrument Inverter 2B.Caused by Personnel Inadvertently Repositioning AC Output Deion Switch.Personnel Counseled.W/ (← links)
- 05000311/LER-1986-003-02, :on 860502,safety Injection Occurred,Resulting in Reactor Trip.Caused by High Steam Flow Coincident W/Low Average Reactor Coolant Temp (Tave).Operating Procedures Revised to Ensure Tave within Programmed Band (← links)
- 05000311/LER-1986-002-02, :on 860416,reactor Trip Occurred Due to Turbine Trip Caused by Steam Generator 23 Reaching hi-hi Level Setpoint.Caused by Excessive Moisture in Feedwater Pump Control Oil Sys.Lube Oil Separator Replaced (← links)
- 05000311/LER-1986-001-02, :on 860320,waste Gas Holdup Sys Not Continuously Sampled for Oxygen.Caused by Procedural Inadequacy Which Prevented Returning Sampling Selector Switch to Auto. Procedure Being Revised (← links)
- 05000311/LER-1985-018, :on 850827,component Cooling Water HX Svc Water Outlet Valve (22SW356) (Bi) Failed to Closed Position. Caused by Vibration Problems.Valve Actuator 22SW356 Replaced (← links)
- 05000311/LER-1984-018, :on 840725,reactor Tripped on Rapid RCS Pressure Drop Upon Opening PORV Block Valve 2PR6. Investigation Revealed Broken Wire in Valve Operator & Possible Inadequate Valve Torque (← links)
- 05000311/LER-1985-015, :on 850720,RCS Unidentified Leakage Determined to Be Outside Tech Spec Limits.Caused by Leakage from Packing Glands on Valves 2PR9 & 2PS8.Leaks Terminated by Adjustment of Packing on Valves (← links)
- 05000311/LER-1981-066-03, /03X-1:on 810720,controllers 2607A & 2610B Failed Due to Low Amperage Readings in Tapes & Two Independent Channels of Heat Trace Inoperable.Caused by Defective Splice.Surveillance Procedures Revised (← links)
- 05000311/LER-1985-017, :on 850808,during Testing of Solid State Protection Sys Train B,Reactor Trip Occurred.Caused by Loose Wire Supplying Power to Undervoltage Trip Mechanism for Reactor Trip Breaker A.Wire Tightened (← links)
- 05000311/LER-1985-016, :on 850723,discovered That Boron Concentrations in Boric Acid Tanks & Boron Injection Tank Below Min Required Value.Caused by Leak in Check Valve Between Boric Acid Blender & Tanks.Concentrations Restored (← links)
- 05000311/LER-1985-012, :on 850708,trip Occurred on lo-lo Water Level in Steam Generator 23.Caused by Lack of Coordination Between Operators & Supervisors in Control Room.Simulator Training Incorporated Into Operator Training (← links)
- 05000311/LER-1985-014, :on 850711,during Valid Testing,Diesel Generator 2B Failed Due to Fuel Oil Leak.Caused by Loose Fitting on Cylinder 31 Fuel Injector.Fitting Tightened.W/ (← links)
- 05000311/LER-1985-011, :on 850707,reactor Tripped from 35% Power During Startup Operations.Caused by Personnel Error. Individual Counseled & 8 H Training Session Conducted for All Licensed Operators (← links)
- 05000311/LER-1985-010, :on 850707,reactor Trip Sys Breakers Failed to Comply W/Tech Spec Requirements.Caused by Failure to Review Applicable Tech Specs.Individual Counseled & Event Included in Training/Requalification Programs (← links)
- 05000311/LER-1985-013-01, :on 850706,generator Field Ground Alarm Received During Testing of Diesel Generator 2B.Caused by Malfunctioning Field Ground Relay.Mechanical Latch Associated W/Relay Aligned & Tested (← links)
- 05000311/LER-1985-020, :on 850921,manual Reactor Trip Initiated Due to Pressurizer Pressure Control Problem.Caused by Pressurizer Spray Valve 2PS3 Off Seat.Transducer Replaced & Spring Tension Adjusted (← links)
- 05000311/LER-1985-019, :on 850911,containment Sump in-leakage Rate Exceeded 1 Gallon Per Minute.Caused by Leak from Pipe Nipple on Containment Fan Coil Unit Vent Line.New Nipple Installed (← links)
- 05000311/LER-1985-004-01, :on 850413,during Startup Operations,Reactor Trip Occurred After Generator Synchronized to Grid.Caused by Personnel Error.Occurrence Discussed W/Operators & Supervisors Involved (← links)
- 05000311/LER-1985-006-01, :on 850423,reactor Trip Initiated When Turbine Lube Oil Cooler Placed in Svc.Caused by Lack of Procedural Guidance to Operators.Main Turbine Lubrication Oil Sys Operating Procedure Revised (← links)
- 05000311/LER-1985-005, :on 850417,reactor/turbine Trip Occurred During Startup Operations.Caused by Corrosion Products Collected in Reheat Steam Drain Line Piping Following Extended Shutdown. Procedural Review to Be Performed Re Blowdown (← links)
- 05000311/LER-1985-007, :on 850407,during Heatup Following Refueling Outage,Four Steam Generator Safety Valves Prematurely Lifted & Gagged Shut.Caused by Incorrect Lift Settings.Valves Reset (← links)
- 05000311/LER-1985-009, :on 850510,reactor Trip Occurred While Performing Rod Control Assembly Surveillance Requirements. Caused by Power Range High Negative Neutron Flux Rate Signals from Dropped Control Rod (← links)
- 05000311/LER-1985-008, :on 850502,reactor Trip Occurred.Caused by Main Generator Loss of Field Relay Actuation Due to Incorrect Wiring.Electrical Schematic Revised to Show Proper Wiring Procedure.Relay Rewired (← links)
- 05000311/LER-1985-003-01, :on 850329 & 30,pressurizer Overpressure Protection Sys Channel II Actuated.Caused by 360 Psig Reached for Reactor Coolant Pump Operation Inducing Pressure Transient Sufficient to Cause Actuation (← links)
- 05000311/LER-1996-006-02, :on 960717,sample Flow to non-radioactive Liquid Radwaste Monitor Was Not Adequate to Meet Plant Ts.Cause of Event Is Under Investigation.Design of 2R37 Sample Line Has Been Revised (← links)
- 05000311/LER-1985-002-01, :on 850308,09 & 14 Diesel Generator 2A Failed to Automatically Start & Accelerate During Surveillance Testing.Caused by Overspeed Device Restricting Operation of Fuel Racks.Overspeed Device Repaired (← links)
- 05000311/LER-1984-026-01, :on 841221,radioactive Liquid Releases Discovered Not Continuously Recorded.Caused by Computer Malfunction Possibly Due to Voltage Fluctuation.New Software Package Ordered (← links)
- 05000311/LER-1984-025-01, :on 841126,audit Revealed That Weekly Plant Vent Particulate Sample for 840927 Not Analyzed within Time Required by Tech Specs.Caused by Personnel Error.Procedures Revised (← links)
- 05000311/LER-1984-024, :on 841004,reactor Tripped Due to Turbine Generator Trip on Differential Relay Protection.Caused by phase-to-ground Fault on Stator Coils B-40 & B-41.Generator Replaced.Investigation Continuing (← links)
- 05000311/LER-1985-001, :on 850128,during Operational Retest,Diesel Generator Tripped Following High Jacket Water Temp Signal. Caused by Failure to Reassemble Valve Per Vendor Manual. Manual Being Revised to Include Ball Valves (← links)
- 05000311/LER-1984-020, :on 840813,during Audit of Component Cooling Sys Valve Lineup,Spent Fuel HX Flow Control Valve 2CC37 Discovered Not Locked,Contrary to Tech Specs.Caused by Removal of Valve Lock for Flow Adjustment (← links)
- 05000311/LER-1981-043-03, /03X-2:on 810612 & 18,pressurizer Overprotection Sys Declared Inoperable Due to Excessive Leakage to Pressurizer Relief tank.Copes-Vulcan 0100-160 Valve Seat Leakage Identified as Generic Problem (← links)
- 05000311/LER-1983-005-03, /03X-1:on 830122,both Channels of Pressurizer Overpressurization Protection Sys Declared Inoperable Due to Leakage in Pressurizer Relief Lines.Porv Plugs Replaced & PORV Circuitry Modified (← links)
- 05000311/LER-1982-083-03, /03X-2:on 820812,during Performance of Routine Surveillance,Control Room Operator Received Indication of Low Svc Water Flow on Containment Fan Coil Unit 25.Caused by Oyster Infestation Restricting Svc Water Flow (← links)
- 05000311/LER-1984-019, :on 840726,during Controlled Cooldown to Mode 5,both Containment Spray Pumps Inadvertently Cleared & Tagged While Unit in Mode 4,contrary to Tech Specs.Caused by Personnel Error.Pumps Returned to Svc (← links)
- 05000311/LER-1984-018-01, :on 840725,during Pressurizer Overpressure Protection Sys Functional Test,Rcs Pressure Rapidly Dropped Upon Opening PORV Block Valve 2PR6.Valve Failed to Close in Required Time & Resulted in Reactor Trip (← links)
- 05000311/LER-1984-016-01, :on 840705,leak Discovered on Common Suction Line to Charging Pumps.Caused by 3-inch Crack in Schedule 10 Suction Header Pumping Originating in Toe of Weld.Unit Shutdown Initiated.Piping Replaced (← links)
- 05000311/LER-1984-023, :on 840906,plant Vent Sample Pump,Providing Flow to Iodine Composite Samples,Found Inoperable Due to Remotely Located Switch Being in Off Position.Installation of Low Flow Alarm Planned (← links)
- 05000311/LER-1984-022, :840905,reactor Trip from 54% Power Occurred Due to Steam Flow/Feed Flow Mismatch Coincident W/Low Water Level in Steam Generator 24.Caused by Sheared Shaft on Condensate Pump 22 (← links)
- 05000311/LER-1984-021, :on 840826,trip of Steam Generator Feed Pump 21 Resulted in Steam Flow/Feed Flow Mismatch on Steam Generators & Reactor Trip.Caused by Failure of Magnetic Speed pick-up Sensor.Sensor Replaced (← links)
- 05000311/LER-1984-015, :on 840530,reactor Tripped from 10% Power During Shutdown.Caused by Conservative Setpoint Value & Excessively Large Reset Deadband of Intermediate Range High Flux Trip Bistables.Setpoint Reset (← links)
- 05000311/LER-1984-014, :on 840528,during Containment Pressure Relief, Utilizing Gaseous Activity Monitor 2R41C,setpoint Not Reduced.Caused by Failure to Follow Operating Procedure. Personnel Counseled & Procedure Reviewed (← links)
- 05000311/LER-1984-013, :on 840511,reactor Trip Occurred While Troubleshooting & Calibr Steam Generator narrow-range Level Recorder 22.Caused by Personnel Error.Troubleshooting/Calibr Check Off Sheets Provided to Reduce Accidents (← links)
- 05000311/LER-1984-011, :on 840428,during Testing Resulting from Two Reactor Trips,Steam Generator 23 Feedwater Flow Indication Channels Unresponsive.Both Channels Declared Inoperable. Feedwater Flow Nozzle Replaced (← links)
- 05000311/LER-1984-012, :on 840424,turbine Stop Valve 21 Failed to Open.Caused by Failure of Equalizing Valve Pilot Valve to Operate.Stroke of Pilot Valve 21MS901 Adjusted & Valve Tested for Proper Operation (← links)
- 05000311/LER-1984-010-01, :on 840423,during Startup Operations,Turbine Trip & Reactor Trip Occurred.Caused by high-high Level in Steam Generator 23.Feedwater Flow Nozzle Replaced & All Sys Performed as Designed (← links)
- 05000311/LER-1984-005, :on 840222,generator Output Breaker Tripped on Overcurrent.Caused by Overcurrent Relay Not Fully Resetting Following Reactor Coolant Pump Start.Surveillance Test Run Satisfactorily Performed (← links)
- 05000311/LER-1984-004-01, :on 840214,diesel Generator 2B Failed to Start.Caused by Fuel Oil Supply Valves Being Shut on 840212 Due to Fuel Oil Leak Developing on One Cylinder.Procedures Revised (← links)
- 05000311/LER-1984-003-01, :on 840215,pressurizer Overpressure Protection Sys Actuated Due to Induced Pressure Transient.Caused by Starting Reactor Coolant Pump.Operating Procedure OPII-1.3.4 Amended (← links)
- 05000311/LER-1984-002-01, :on 840209,RHR Common Suction Valve 2RH1 Inadvertently Shut,Resulting in Loss of RHR Flow Through Rcs.Caused by Bezel Covers Not Removed to Reflect Release of Breaker Tags (← links)
- 05000311/LER-1984-009-01, :on 830808,sample Isolation Valve from Gas Decay Tank 23 Inoperable Due to Closed Air Supply Valve. Air Supply Valve Overlooked When Tagging Request Released (← links)
- 05000311/LER-1983-018-03, /03L-0:on 830428,during pre-test Insp of Fuel Handling Area Ventilation Sys,Roughing Filter Elements Found Installed in HEPA Filter Location in Normal Filter Train. Filters Replaced.Procedures Revised (← links)
- 05000311/LER-1983-019-03, /03L-0:on 830430,vital Instrument Bus 20 Deenergized & Tagged Out for Maint,Resulting in Loss of Power Range Channel N-44.Caused by Shift Supervisor Being Unaware of Deenergization (← links)
- 05000311/LER-1984-008-01, :on 840406,turbine Trip & Reactor Trip Occurred,Due to False Low Condenser Vacuum Signal.Vacuum Gauges Removed from Svc & Instrument Line Disconnected at Trip Block & at Pressure Detector (← links)
- 05000311/LER-1984-007-01, :on 840401,while Performing Routine Surveillance on Rod Control Assemblies,Four Rods Discovered Missing from Checkoff Sheet.Caused by Typographical Error. Surveillance Satisfactorily Performed (← links)
- 05000311/LER-1984-006-01, :on 840318,loss of 2B 4 Kv Vital Bus Occurred While Paralleling Emergency Diesel Generator 2B W/Grid. Caused by Phase Mismatch.All 4 Kv Breakers Racked Out & Inspected (← links)
- 05000311/LER-1983-064-03, /03L-0:on 831202,during Surveillance Test on Low Pressure Carbon Dioxide Fire Suppression Sys,Pilot Valve 2FP377 Did Not Completely Seat.Caused by Frost on Valve Seat.Valve Seated Properly (← links)
- 05000311/LER-1983-061-03, /03L-0:on 831207,during Maint Shutdown,Safeguards Equipment Control Channel 2A Inadvertently Actuated While Testing,Causing Vital Bus 2A to Be Deenergized.Caused by Reversing Polarity of Leads (← links)
- 05000311/LER-1983-065-03, /03L-0:on 831207,diesel Generator 2B Voltage Regulator Failed,Causing Generator Breaker to Trip on Overcurrent.Caused by Grounded Voltage Regulator Control Power Transformer.Transformer Replaced (← links)
- 05000311/LER-1983-060-01, /01T-0:on 831128,inverter 2B Not Connected to Dc Bus,Rendering Inverter Technically Inoperable.Caused by Requirement Oversight Due to Different Tech Spec Requirements.Tech Spec Difference Resolved (← links)
- 05000311/LER-1983-059-03, /03L-0:on 831108,spurious Actuation Involving Safeguards Equipment Control 2P Encountered.Probably Caused by Previous Relay Testing.Relays Replaced (← links)
- 05000311/LER-1983-058-03, /03L-0:on 831107,diesel Generator 2B Declared Inoperable Due to Inability of Diesel to Maintain Rated Speed & Voltage.Caused by Loose shaft-driven Fuel Oil Pump Coupling.Coupling Repaired (← links)
- 05000311/LER-1983-057-03, /03L-0:on 831006,during Performance of Run to Prove Operability of Auxiliary Feedwater Pump 23,noise Heard & Turbine Tripped.Pump Declared Inoperable.Caused by Closed Turbine Steam Supply Line Valves Failure (← links)
- 05000311/LER-1983-051-03, /03L-0:on 830929,pressure Demand Signal Dropped, Causing Pressurizer Spray Valves to Open & RCS Pressure to Drop.Caused by Difference Between Two Channel Signal Isolator Outputs to Pressurizer Controller (← links)
- 05000311/LER-1983-054-03, /03L-0:on 831001,during Routine Surveillance, Control Rod Position Indicator 1B4 Indicated Slightly Greater than Max Value Allowed by Tech Specs.Caused by Drifting of Channel Calibr.Indicator Recalibr (← links)
- 05000311/LER-1983-055-03, /03L-0:on 831004,during Routine Power Operation, Steam Generator Pressure Channel II Instrument 21 Indicated Excessively Different than Redundant Channels.Cause Unknown. Minor Calibr Performed (← links)
- 05000311/LER-1983-052-03, /03L-0:on 830928 & 1005,130-ft Elevation Containment Air Lock Failed to Meet Requirements for Routine Surveillance Testing of Air Lock Door Seals.Possibly Caused by Improper Test Methods.Training Upgraded (← links)
- 05000311/LER-1983-053-99, /99X-0:on 830812,while Increasing RCS Pressure to 2,000 Psig,Both Pressurizer Spray Valves Opened & RCS Pressure Started to Decrease.Probably Caused by Pressure Control manual-auto Loading Station (← links)
- 05000311/LER-1983-056-03, /03L-0:on 831005,operator Noticed Trip Indication for Auxiliary Feedwater Pump 23 Illuminated.Caused by Valve Latching Operation Not Properly Performed.Valve Position Indication Sys Devised (← links)
- 05000311/LER-1983-047-03, /031-0:on 830829,various 2A Safeguards Equipment Control (Sec) Alarms Received.On 830830 Vital Bus 2A Tripped W/O Automatic Transfer.Cause Under Investigation.Sec Channel Reset.Power Restored to Bus (← links)
- 05000311/LER-1983-049-01, /01T-0:on 830923,containment Compressed Air Supply Isolation Valve Discovered Not Locked Closed.Caused by Personnel Error During Verification of Equipment Status During Mode Change.Operators Counseled (← links)
- 05000311/LER-1984-001-01, :on 840112,reactor Coolant Loop Resistance Temp Detector Bypass Line 14 Experienced Low Flow Condition. Caused by Corrosion Product Blockage.Bypass Line Valves Will Be Replaced.Handwheels 22RC17 & 23RC24 Removed (← links)
- 05000311/LER-1983-041-03, /03L-0:on 830801 & 09,spurious Actuations of Safeguards Equipment Control Sys Channel a Caused Deenergization of Vital Bus 2A.Possibly Caused by near-short Condition on Output Test Panel Terminals (← links)
- 05000311/LER-1983-042-03, /03L-0:on 830802 & 11,control Rod Position Indicator Channel Indicated Greater than 12 Steps Difference as Compared to Group Demand Indication.Caused by Indicator Reading Low & Signal Conditioner Module Drift (← links)
- 05000311/LER-1983-043-03, /03L-0:on 830802 & 07,reactor Coolant Flow Channel I,Number 24 Indicated Excessively High.Caused by Static Shift in Transmitter & Failure of Transmitter Oscillator, Respectively.Transmitter Readjusted (← links)
- 05000311/LER-1983-067-03, /03L-0:on 831231,during Surveillance Testing, Diesel Generator 2B Experienced Fuel Oil Leak on Cylinder Injector 8R.Caused by Fuel Oil Manifold to Injector Gasket Leakage.Gasket Replaced (← links)
- 05000311/LER-1983-066-03, /03L-0:on 831220,common Suction Valve 2RH1 Closed, Resulting in Loss of RHR Flow.Caused by Personnel Error.Rhr Pump 22 Started & RHR Flow Reestablished within 22 Minutes (← links)
- 05000311/LER-1983-062-03, /03L-0:on 831128,during Vital Instrument Bus Transfer,Rhr Common Suction Valve 2RH2 Closed,Resulting in Loss of RHR Flow Through Rcs.Caused by Pressure Transmitter PT-405 Spike Due to Voltage Transient (← links)
- 05000311/LER-1982-137-03, /03L-0:on 821115,during Routine Operation,Control Room Operator Discovered That Auxiliary Alarm Typewriter Not Printing Intelligibly.Caused by Tilt Ring Assembly Being Out of Adjustment.Assembly Readjusted (← links)
- 05000311/LER-1983-048-03, /03L-0:on 830927,attempts to Demonstrate Operability of Pressurizer Overpressure Protection Sys Valves Failed.Caused by Problems W/Valve Position Indicators.Porv Circuitry Modified (← links)
- 05000311/LER-1983-050-03, /03L-0:on 830916,pressure Drop Test Surveillance of Containment Isolation Valves 2VC5 & 2VC6 Revealed That Leakage Past Valves Greater than Max Range of Test Equipment.Caused by Deformed Elastomer Lining (← links)
- 05000311/LER-1983-038-03, /03L-0:on 830827,vital Bus 2B Hydrogen Analyzer Channels 12 & 22 Failed to Restart.Caused by Voltage Transient.Channel Circuits Replaced & Restarted & Action Statement Terminated (← links)
- 05000311/LER-1983-046-03, /03L-0:on 830816 & 18,containment Fan Coil Unit 22 Observed to Trip During Low Speed Operation.Caused by Allowable Breaker Trip Device Setpoint Deviation.Adjustments Made & Incorporated Into Procedures (← links)
- 05000311/LER-1983-045-03, /03L-0:on 830814 & 15,surveillance Testing of Containment Air Lock Revealed Broken Air Flow Test Gauge Cover & Excessively Leaking Outer Door Seals.Caused by Improper Use.Cover & Seals Replaced (← links)
- 05000311/LER-1983-035-01, /01T-0:on 830725,flux Map Results Indicated That Tech Spec Limits for Enthalpy Hot Channel Factor Would Be Exceeded During Low Power Operation W/Control Rods Near Insertion Limits.Caused by Improper Modeling (← links)
- 05000311/LER-1983-037-03, /03L-0:from 830705-07,four Steam Generator Safety Valves Found to Have Lift Settings Less than Required by Tech Specs.Caused by Inadequacies in Surveillance Procedures & Maint on Valves.Valves Reset (← links)
- 05000311/LER-1983-033-03, /03L-0:on 830707,during Start of Auxiliary Feedwater Pump 23 for Monthly Surveillance,Large Amount of Steam Emitted from Pump Vicinity.Caused by Hole in Pump Steam Supply Drain Line.Leaky Section Replaced (← links)
- 05000311/LER-1983-034-03, /03L-0:on 830708,surveillance Testing Revealed Excessive Seal Leakage on Inner Door of 130-ft Elevation Containment Air Lock.Caused by Rapid Operation of Door So Door Seals Unevenly Seated in Seal Groove (← links)
- 05000311/LER-1983-029-99, /99L-0:on 830617,pressurizer Overpressure Protection Sys Actuated Due Pressure Transient Resulting from Compressed Pressurizer Bubble.Caused by Personnel Leaving Charging Pump in Svc (← links)
- 05000311/LER-1983-031-03, /03L-0:on 830623,spurious Safeguards Equipment Control Sys Actuation Deenergized Various Loads on Vital Bus 2A.Caused by Internal Circuitry Noise.Corrective Action to Be Taken When Investigation Completed (← links)
- 05000311/LER-1983-032-03, /03L-0:on 830623,large Leak Discovered in Svc Water Bay 2.Caused by Failed Gasket in Joint Downstream of Check Valve 22SW5 Due to Poor Access to Joint.Joint Remade & Design Changed (← links)
- 05000311/LER-1983-044-01, /01T-0:on 830811,following Reactor Trip,Vital Bus Sustained Degraded Undervoltage Relays Found Slightly Below Min Value.Caused by Setpoint Drift.Relays Recalibr (← links)
- 05000311/LER-1983-039-03, /03L-0:on 830723,control Rod 2C4 Inserted Fully & Could Not Be Withdrawn.Unit Placed in Hot Standby.Caused by Control Rod Drive Mechanism Cable Connector Pins Pushed Into Insulator,Resulting in Intermittent Connection (← links)
- 05000311/LER-1983-015-03, /03L-0:on 830407,during Routine Shutdown for Refueling,Testing Results of Four Mechanical Snubbers Revealed That Devices Did Not Meet Tech Spec Requirements. Cause Not Stated.Snubbers Returned to Manufacturer (← links)
- 05000311/LER-1983-012-03, /03L-0:on 830406,10-ton Cardox Sys Pilot Valve Found in Closed Position & All Low Pressure Sys Declared Inoperable.Caused by Inadequacies in Sys Recharging Operation on 830304.Procedures Revised (← links)
- 05000311/LER-1983-013-03, /03L-0:on 830409,during Routine Shutdown,Lube Oil Temp Increases Observed on Charging Pump 22.Caused by Restricted Svc Water Flow to Pump Due to Oyster Shells & Miscellaneous Mollusks.Shells Removed (← links)
- 05000311/LER-1983-011-03, /03L-0:on 830401,discovered That Monthly Testing of Control Room Emergency Air Conditioning Sys Was Overlooked.Caused by Insp Order Sys Card Requiring Testing Being Erroneously Stated.Card Revised (← links)
- 05000311/LER-1983-004-04, /04L-0:on 830317,during Gaseous Effluent Testing, Iodine/Particulate Collection Device Sample Pump Deenergized.Caused by Not Including Pump on Electrical Distribution List.Tagging Sys Will Be Revised (← links)
- 05000311/LER-1983-002-03, /03L-0:on 830314,discovered Pressurizer Code Safety Valves 2PR3,2PR4 & 2PR5,tested by Wyle Labs During 830224-25,lifted Below 2,485 Psig Plus/Minus 1% Pressure Range & Displayed Heavy Audible & Visual Seat Leakage (← links)
- 05000311/LER-1983-027-03, /03L-0:on 830604,during 18-month Surveillance of Fuel Handline Area Ventilation Sys,Charcoal Absorber Failed Freon Test.Caused by Saturation from Water Vapor Due to Humid Fuel Storage Atmosphere.Study Underway (← links)
- 05000311/LER-1983-028-03, /03L-0:on 830607,discovered That Auxiliary Bldg Ventilation Sys Charcoal Absorber Failed Freon Test Due to Absorber Degradation.Caused by Refrigeration Coolant Leaks & Leakage from Freon Decontamination Unit (← links)
- 05000311/LER-1983-025-03, /03L-0:on 830524,RHR Pump & Fuel Handling Bldg Exhaust Fan 21 Tripped.Caused by Floating Logic Line & Internal Circuitry Noise in Safeguards Equipment Control Sys.Testing Design Change Issued (← links)
- 05000311/LER-1982-112-01, /01P:on 821005,svc Water Discovered Leaking at Rate of 1 Gallon Per Minute Inside Containment Bldg on Fan Coil Unit 21.Cause Not Stated.Leak Isolated.Investigation Continuing.Detailed Rept Forthcoming (← links)
- 05000311/LER-1982-113-01, /01P:on 821005,during Routine Operation,Svc Water Leak Discovered Inside Containment on Fan Coil 22. Cause Unknown.Investigation in Progress.Rept Will Be Submitted Per IE Bulletin 80-24 (← links)
- 05000311/LER-1982-058-03, /03L-0:on 820702,svc Water Flow to Containment Fan Coil Unit 23 Less than Amount Required for Low Speed Operation.Caused by Oysters Plugging Valve.Oysters Removed. Development of Chlorination Program in Progress (← links)
- 05000311/LER-1982-025-03, /03L-0:on 820402,after Closing RHR Pump 22,pump Supply Breaker Opened Due to Phase a Overcurrent Rendering Pump & Related ECCS Subsystem Inoperable.Cause of Breaker Overcurrent Trip Unknown.Pump Tested Satisfactorily (← links)
- 05000311/LER-1983-016-04, /04L-0:on 830418 & 22,small Amounts of Low Level Liquid Radwaste Released to util-controlled Area from Waste Monitoring Tank 21.Caused by Leakage from Liquid Waste Sys Components.Valve 1LW13 Flange Tightened (← links)
- 05000311/LER-1983-010-03, /03L-0:on 830126,during Shutdown Operations, Control Air Header 21 Isolated & Tagged for Leak Rate Testing.Porv 2PR1 Closed Resulting in Loss of RCS Vent Path. Caused by Surge in Header 22 Due to Failed Valve (← links)
- 05000311/LER-1983-009-03, /03L-0:on 830203,during Shutdown Operation,Sample Analysis of RCS Boron Concentration Revealed Concentration Less than Tech Spec Limit.Caused by Hydrolazing Steam Generators.Rcs Boration Performed to Maintain Concentration (← links)
- 05000311/LER-1983-007-01, /01T-0:on 830210 & 11,during Routine Surveillance Testing,Two Steam Generator Snubbers Failed to Meet Acceleration & Bleed Test Requirements.Caused by Aging of Snubber Piston Seal Rubber Matl.Seals Will Be Rebuilt (← links)
- 05000311/LER-1983-008-99, /99X-0:on 830218,diesel Generator Area Low Pressure Carbon Monoxide Sys Automatic Initiation Feature Disabled & Tagged Out for Planned Maint.Continuous Fire Watch Established.On 830131,event Became Reportable (← links)
- 05000311/LER-1983-003-03, /03L-0:on 830111,rod Position Indicator Channel 1SA2 Indicated Approx Half Scale,Contrary to Flux Map Indication That No Change in Rod Position Occurred.Caused by Failed Signal Conditioner.Module Replaced (← links)
- 05000311/LER-1982-145-03, Following Shift of Vital Bus 2B Power Source,Computer P-250 Found Down.Caused by Failure of Inverter Power Supply Due to Failed Oscillator Circuit Board (← links)
- 05000311/LER-1982-141-03, /03L-0:on 821121 & 1204,RCS Subcooling Monitor Declared Inoperable.Caused by Parity Error in R-250 Computer Due to Insufficient Ventilation.Computer Reprogrammed & Temporary Fan Installed (← links)
- 05000311/LER-1982-143-03, /03L-0:on 821124,during Surveillance Review, Discovered Reactor Trip Breaker Manual Trip Feature Not Tested Before 821119 Startup.Caused by Confusion Involving Recent Changes in Procedures Re Testing of Trip Breaker (← links)
- 05000311/LER-1982-139-03, /03L-0:on 821119,auxiliary Feedwater Storage Tank Dropped Below Tech Spec Min Vol of 200,000 Gallons.Caused by Personnel Error.Tank Level Restored & Operator Counseled (← links)
- 05000311/LER-1982-138-03, /03L-0:on 821119,shift Supervisor Realized That Surveillance Requirement to Check Local Sightglass Levels of Accumulators 23 & 24 Was Overdue.Caused by Personnel Oversight.Personnel Counseled (← links)
- 05000311/LER-1982-142-03, /03L-0:on 821123,steam Generator 21 Level Channel IV Indication Read 4% Higher than Other Channels & Declared Inoperable.Caused by Failure of Channel Level Transmitter. Transmitter Replaced (← links)
- 05000311/LER-1982-136-01, /01T-0:on 821124,small Svc Water Leak of 0.5 Gpm Discovered on Cooling Coil of Containment Fan Coil Unit 23. Caused by Erosion of Cooling Coil by Silt in Svc Water. Coil Blanked Off to Seal Leak (← links)
- 05000311/LER-1982-133-03, /03L-0:on 821107,during Routine Operation,Control Room Operator Discovered Containment Gaseous Activity Monitor Malfunctioned.Caused by Intermittent Connection on Integrated Circuit or Circuit Board.Units Reseated (← links)
- 05000311/LER-1982-134-03, /03L-0:on 821110,during Routine Surveillance, Turbine Trip Low Autostop Oil Pressure Channel II Bistable Observed to Trip Low.Caused by Mechanical Wear in Channel Pressure Switch.Switch Replaced (← links)
- 05000311/LER-1982-132-03, /03L-0:on 821106 & 15,spurious Actuation of Safeguards Equipment Control Cabinet 2A Resulted in de-energization of Vital Bus 2A.Caused by Noise in Sys Control Circuitry.Noise Suppression Devices Will Be Added (← links)
- 05000311/LER-1982-135-01, /01T-0:on 821121,during Routine Surveillance,Small Svc Water Leak Discovered on Cooling Coil of Containment Fan Coil Unit 25.Caused by Silt in Svc Water.Coil Repaired.New Design Coils Will Be Installed During Next Refueling (← links)
- 05000311/LER-1982-108-03, /03L-0:on 820915 & 17,RPI 1C4 Discovered Reading Greater than 12 Steps Lower than Bank Demand Indication.Caused by Combination of RPI Module Calibr Drift & Change in Actual Rod Position Signal Output (← links)
- 05000311/LER-1982-106-03, /03L-0:on 820913,six Broken Links Discovered on Circulator Travelling Screen 21A.Possibly Caused by stress-induced Cracking.Links Replaced.Design Change Request Issued to Consider Stainless Steel Links (← links)
- 05000311/LER-1982-085-03, /03L-0:on 820816,two Malfunctions of Reactor Coolant Channel Flow Indication 24 Experienced Due to Failure of Signal Isolation Amplifiers.No Common Cause for Isolation Amplifier Failure Determined.Amplifiers Replaced (← links)
- 05000311/LER-1982-130-03, /03L-0:on 821031 & 1105,svc Water Flow to Containment Fan Coil Unit 23 Observed Low.Caused by Silt Clogging Back Pressure Control Valves.Valves Cycled During Cooler Leak Repair.Low Flow Eliminated When Unit Started (← links)
- 05000311/LER-1982-131-03, /03L-0:on 821028 & 1106,P-250 Computer Observed Operating Erratically & RCS Subcooling Margin Monitor Declared Inoperable.Caused by 4-volt Dc Power Supply Drifting Low.Power Supply Adjusted (← links)
- 05000311/LER-1982-127-03, /03L-0:on 821020,RCS Water Inventory Not Performed within Time Limits.Caused by Personnel Oversight & License Inadequacy.Surveillance Completed,Personnel Counseled & License Change Request Submitted (← links)
- 05000311/LER-1982-129-03, /03L-0:on 821024 & 26,during Routine Surveillance on Containment Air Lock,Excessive Leakage Observed on Inner Door Seals.Caused by Improper Operation of Air Lock Doors. Air Locks Repaired (← links)
- 05000311/LER-1982-124-03, /03L-0:on 821011,reactor Tripped Due to Underfrequency Signals on Group Buses 2F & 2H.Signals Caused by Ac Noise Generated by Failed Annunciator Power Supply for Diesel Generator 2A.Power Supply Replaced (← links)
- 05000311/LER-1982-123-03, /03L-0:on 821010,svc Water Flow to Containment Fan Coil Unit Was 2,400 Gpm Rather than Required 2,500 Gpm. Caused by Low Setpoint on Flow Control.Controller Tested & Setpoint Readjusted to Proper Flow (← links)
- 05000311/LER-1982-122-01, /01T-0:on 821018,small Svc Water Leak Found in Containment Fan Coil Unit 22.Caused by Accelerated Erosion Due to Silt in Svc Water.Leaking Coil Blanked Off.New Design Cooler Will Be Installed During Outage (← links)
- 05000311/LER-1982-115-03, /03L-0:on 820928,svc Water Leak Found on 2A Emergency Diesel Generator Oil Cooler Piping.Caused by Silt in Svc Water Triggering Accelerated Erosion.Failed Pipe Cap Replaced (← links)
- 05000311/LER-1982-114-03, /03L-0:on 820927,RMS Apd Filter Drive Unit Malfunctioned.Caused by Slipped Pin Attaching Solenoid Arm to Ratchet Cog.Pin Installed Through Bottom Instead of Top of Connecting Sleeve.Pin Reinstalled Correctly (← links)
- 05000311/LER-1982-118-03, /03L-0:on 820929,during Routine Surveillance, 2C Vital Bus Undervoltage Relay Failed to Drop Out on Decreasing Voltage.Caused by Out of Adjustment Relay Stop Lever.Lever Adjusted & Satisfactorily Tested (← links)
- 05000311/LER-1982-117-03, /03L-0:on 820929,svc Water Flow to Containment Fan Coil Unit 23 Found Below Tech Spec Requirements.Caused by American Oysters Plugging Valve 22SW57.Oysters Removed & Valve Reassembled.Improved Chlorination Being Developed (← links)
- 05000311/LER-1982-110-03, /03L-0:on 820926,no Indication of Seal Interspace Air Pressure Found on Containment Air Lock.Air Lock Also Failed Seal Leakage Test.Caused by Loose Pivot on Air Interlock Linkage.Leakage Caused by Failure of Seal Joint (← links)
- 05000311/LER-1982-107-03, /03L-0:on 820923,axial Flux Distribution Went Out of Target Band Due to Turbine Load Reduction When Turbine Generator Stator Water Temp Increased.Temp Increase Caused by Clogged Ports on Valve Positioner 2ST1 (← links)
- 05000311/LER-1982-116-03, /03L-0:on 820927 & 28,RCS Subcooling Margin Monitor Failed.Caused by Malfunction of Computer Logic Board in Process Computer & Previous Repair of Computer, Respectively.Logic Board Replaced & Point Reset (← links)
- 05000311/LER-1982-111-01, /01T-0:on 821002,small Svc Water Leak of 0.5 Gpm Discovered on Cooling Coils of Containment Fan Coil Unit 23. Caused by Erosion of Cooling Coils by Silt in Svc Water. Belzona Metal Filler Used in Repair.New Coils Purchased (← links)
- 05000311/LER-1982-102-03, /03L-0:on 820823,130-ft Elevation Containment Air Lock Declared Inoperable After Excessive Leakage Discovered Past Inner Door Seals.Caused by Closing Door W/Excessive Force.Seal Replaced.Installation of Snubbers Proposed (← links)
- 05000311/LER-1982-093-01, /01T-0:on 820910,containment Fan Coil Unit 21 Declared Inoperable When Svc Water Leak Discovered.Caused by Erosion of Cooling Coil.Leaking Coil Blanked Off.Design Change Submitted to Replace Coils W/Erosion Resistant Matl (← links)
- 05000311/LER-1982-088-03, /03L-0:on 820824,containment Fan Coil Unit 25 Declared Inoperable After Low Svc Water Flow Observed.Caused by Air Regulator Being Out of Adjustment.Air Regulator Adjusted & Fan Coil Unit Satisfactorily Tested (← links)
- 05000311/LER-1982-094-03, /03L-0:on 820825,2C Vital Bus Undervoltage Relay Failed to Trip at Required Setpoint.Caused by Setpoint Drift.Channel Declared Operable & Action Statement 3.3.2a Action 14 Terminated (← links)
- 05000311/LER-1982-090-03, /03L-0:on 820822,operator Discovered Seal Cut on 100-ft Elevation Containment Air Lock Outer Door.Caused by Rubber Seal Partially Leaving Retaining Groove Due to Personnel Closing Door W/Excessive Force.Seal Replaced (← links)
- 05000311/LER-1982-096-03, /03L-0:on 820831,containment Fan Coil Unit 23 Declared Inoperable When Operator Received Indication of Low Svc Water Flow.Caused by Silt Buildup in Cooling Coils.Flow Control Valve Cycled & Unit Tested Satisfactorily (← links)
- 05000311/LER-1994-002, :on 940119,discovered RCS Flow Low or That Unit Operating Above 3411 Megawatts.Cause Under Investigation.Administrative Controls Implemented to Limit Reactor Thermal Power to 95% (← links)
- 05000311/LER-1982-092-01, /01T-0:on 820908,svc Water Leak Discovered on Containment Fan Coil Unit 21.Caused by Erosion of Motor Cooling Coils.Motor Cooler Replaced & Fan Coil Tested Satisfactorily (← links)
- 05000311/LER-1982-080-01, /01P:on 820821,svc Water Leak Discovered Inside Containment Bldg,On Containment Fan Coil Unit 24.Cause Not Stated.Investigation Underway (← links)
- 05000311/LER-1982-089-01, /01P-0:on 820830,during Routine Power Operation, Svc Water Leak Discovered Inside Containment Bldg on Containment Fan Coil Unit 23.Cause Being Investigated.Rept Will Be Submitted Per IE Bulletin 80-24 (← links)
- 05000311/LER-1982-077-01, /01T-0:on 820818,containment Sump Pump Discovered Leaking & Containment Fan Coil Unit 21 Indicated Increased Humidity & Rising Drain Pot Level.Caused by Leaking Secondary Coil Due to Erosion of Piping (← links)
- 05000311/LER-1983-001-03, /03L-0:on 830106,reactor Trip Breaker a Failed to Open Following Reactor Trip.Caused by Malfunctioning Breaker Undervoltage Relay Due to Binding of Relay Mechanism by Dirt or Corrosion.Breaker Replaced.Periodic Insp Initiate (← links)
- 05000311/LER-1982-153-03, /03L-0:on 821213,while Performing Sp on 100-ft Elevation Containment Air Lock,Determined Leakage Rate Exceeded Tech Spec Limit.Caused by Excessive Air Flow Past Inner Door Seal.Door Seal Repositioned in Groove (← links)
- 05000311/LER-1982-152-03, /03L-0:on 821207,investigation of High Reading on Number 23 Steam Generator Steam Flow Channel II Revealed Transmitter Out of Calibr.Caused by Isolated Failure of Transmitter.Device Replaced & Channel Calibr (← links)
- 05000311/LER-1982-150-03, /03L-0:on 821203,rod Position Indicator 2B4 Read 14 Steps Lower than Bank Demand Position Indicator. Caused by Channel Indicator Drift.Indicator Recalibr (← links)
- 05000311/LER-1982-148-03, /03L-0:on 821208,steam Generator 21 Level Channel II Instrument Observed to Have Failed High.Caused by Leakage Past Packing of Instrument Root Valve 21BF23.Valve Repacked & Channel Tested Satisfactorily (← links)
- 05000311/LER-1982-147-03, /03L-0:on 821205,during Routine Operation,Vital Bus 2A de-energized Due to Spurious Actuation of Safeguards Equipment Control Cabinet 2A.Caused by Noise in Sys Control Circuitry.Vital Bus Restored (← links)
- 05000311/LER-1982-144-03, /03L-0:on 821126,light on Control Console Indicated Closed During Attempt to Open Nitrogen Supply Header Valve 2NT32.Caused by Internal Binding.Valve Closed & Leak Rate Test Performed (← links)
- 05000311/LER-1982-140-03, /03L-0:on 821121,while Performing Surveillance Procedure SP(0)4.6.1.3 on 130 Ft Elevation Containment Airlock,Leakage Rate Exceeded Tech Specs.Caused by Excessive Air Flow Past Inner Door Seal.Seal Repositioned (← links)
- 05000311/LER-1982-104-03, /03L-0:on 820908,vital Bus 2A Would Not Transfer Automatically from One 4 Kv Transformer to Another.Caused by Dirt in Undervoltage Relay.Relay Cleaned (← links)
- 05000311/LER-1982-073-01, /01T-0:on 820813,during Containment entry,1.5 Gpm Svc Water Leak Discovered on Containment Fan Coil Unit 23. Caused by Failed Cooling Coil Due to Erosion by Silt Particles.Leak Repaired W/Belzona Metal Filler (← links)
- 05000311/LER-1981-002-03, /03L-0:on 810117,during Routine Surveillance Test, 2A Diesel Generator Failed to Accelerate to 875 Rpm within 10-s.Caused by Failure of Solenoid Pilot Valves 21DA23A & 22DA23B.Valves Replaced (← links)
- 05000311/LER-1982-086-03, /03L-0:on 820915,water Observed Dripping from Oil Level Sightglass on Svc Water Pump Motor.Caused by Failed Motor Bearing Oil Cooler Due to Accelerated Erosion & Corrosion.Failed Cooler Repaired (← links)
- 05000311/LER-1982-109-01, /01T-0:on 820923,svc Water Leakage of Approx 0.6 Gpm Discovered on Containment Fan Coil Unit 21 Cooling Coil. Caused by Erosion by Silt in Svc Water.Leaks Repaired W/ Blanked Flange & Belzona Metal Filler (← links)
- 05000311/LER-1982-105-03, /03L-0:on 820908,svc Water Flow to Containment Fan Coil Unit 22 Found Less than Required by Tech Specs.Caused by Silt Deposited in Cooling Coils Restricting Svc Water Flow.Pressure Control Valve Cycled to Flush Out Silt (← links)
- 05000311/LER-1982-097-03, /03L-0:on 820910,RCS Water Inventory Not Performed within Specified Time Interval.Caused by Failure of Surveillance to Make Allowance for Routine Unavoidable Transients Precluding Inventory Performance (← links)
- 05000311/LER-1982-103-03, /03L-0:on 820904,while Running Auxiliary Alarm Summary,Control Breaker Alarm Observed for Containment Spray Pump 21.Caused by Opened 4 Kv Breaker Hl Contact.Breaker Racked Out & Pump Declared Operable (← links)
- 05000311/LER-1982-012-03, /03X-1:on 820209,steam Generator Level Channel 2 Displayed Erratic Behavior,Indicating Drift.Apparently Caused by Intermittent Ground on Signal Lead.Ground Eliminated by Lifting Leads While Troubleshooting Problem (← links)
- 05000311/LER-1982-098-03, /03L-0:on 820901,indication of Low Svc Water Flow Received on Containment Fan Coil Unit 21.Caused by Silt build-up in Cooling Coils.Svc Water Flow Control Valve Cycled & Coil Unit Tested Satisfactorily (← links)
- 05000311/LER-1982-061-03, /03X-1:on 820716,steam Generator Level Channel II Indication Erratic.Caused by Leakage Past Packing on Root Valve 21BF28.Valve Repacked & Leakage Stopped (← links)
- 05000311/LER-1982-099-03, /03L-0:on 820902,control Room Operator Received Indication of Low Svc Water Flow on Containment Fan Coil 23. Caused by Silt Buildup in Cooling Coils.Svc Water Flow Control Isolation Valve Cycled (← links)
- 05000311/LER-1982-101-01, /01T-0:on 820916,svc Water Leakage Discovered in Cooling Coils of Containment Fan Coil Unit 21.Caused by Excessive Erosion of Cooling Coils by Silt.Coils Repaired. New Design Coils Will Be Installed During Next Refueling (← links)
- 05000311/LER-1982-072-03, /03L-0:on 820820,reactor Trip Breaker B Would Not Trip as Required During Surveillance Testing.Caused by Failure of Undervoltage Coil.Reactor Trip Breaker Replaced W/Train Bypass Breaker a (← links)
- 05000311/LER-1982-091-01, /01T-0:on 820906,containment Fan Coil Unit 23 Found Leaking Svc Water.Caused by Erosion of Copper Nickel Cooling Coils by Silt Laden Svc Water.Leaking Coil Blanked Off.Coils Will Be Replaced W/Erosion Resistant Matl (← links)
- 05000311/LER-1982-081-03, /03L-0:on 820813,RCS Chemistry Surveillance,Due 820813,had Not Been Completed Until 820814.Caused by Oversight by Chemistry Analyst.Chemistry Analyst Counseled (← links)
- 05000311/LER-1981-106-03, /03X-1:on 810924,damper 2CAA4 in Control Room Emergency Air Conditioning Sys Failed to Close in Correct Position.Caused by Sticking Damper Due to Binding of Operating Mechanism.Mechanism Freed & Tested (← links)
- 05000311/LER-1982-084-01, /01T-0:on 820829,discovered Svc Water Leak of 0.5 Gpm on Containment Fan Coil Unit 23.Caused by Erosion of Copper Nickel Cooling Coils.Coil Repaired W/Belzona (← links)
- 05000311/LER-1982-071-03, /03L-0:on 820729,nitrogen Pressure in Accumulator 22 Dropped Below Tech Spec Pressure of 595.5 Psig.Caused by Operator Error.Accumulator Nitrogen Pressure Restored to Correct Pressure (← links)
- 05000311/LER-1981-021-03, /03L-0:on 810519,auxiliary Feedwater Tank Fell Below Min Operating Level.Caused by Personnel Error.When Tank Used as Water Supply for Steam Line Heatup,Supply to Tank Throttled Too Far to Compensate for Water Removed (← links)
- 05000311/LER-1981-029-03, /03L-0:on 810520,reactor Coolant Pump Flow Indication,Channel 2 Failed Low.On 810526,bistable Tripped. Caused by Failure of Flow Transmitter 2FT425.Oscillator Amplifier Assembly & Force Motor Assembly Replaced (← links)
- 05000311/LER-1981-019-03, /03L-0:on 810517,rod Position Indicator for Bank 1B4 Was Observed Offscale.Caused by Signal Conditioning Module Out of Calibr.Module Recalibr & Tested Satisfactorily (← links)
- 05000311/LER-1982-060-03, /03L-0:on 820722,level Accumulators 24 & 23 Determined Below Operating Band & Declared Inoperable.Caused by Drift of Level Indications.Sightglass Indications Installed on Both Accumulators (← links)
- 05000311/LER-1982-074-01, /01T-0:on 820813,leakage to Containment Sump Increased.Caused by Cooling Coil Failures Resulting from Erosion by Silt Particles in Svc Water.Leak Repaired by Blanking Flanges in Lines to Coil (← links)
- 05000311/LER-1982-075-01, /01T-0:on 820814,1 Gpm Svc Water Leak Discovered on Containment Fan Coil Unit 22.Cause Not Stated.On 820815, Similar Leak Discovered on Unit 24.Unit 22 Repaired by Blanking Flanges in Svc Water Piping to Coil (← links)
- 05000311/LER-1982-070-01, /01T-0:on 820809,0.5 Gpm Svc Water Leak Observed on Containment Fan Coil Unit 24.Caused by Failed Cooling Coil Due to Erosion from Silt Particles in Svc Water.Leakage Stopped by Blanking Flanges in Lines to Coils (← links)
- 05000311/LER-1982-047-03, /03L-0:on 820530,while Entering Containment,Maint Personnel Unable to Shut Inner Door on 100-ft Elevation Containment Air Lock.Caused by Maladjusted Latch Linkage. Linkage Adjusted.No Further Action Necessary (← links)
- 05000311/LER-1982-043-03, /03L-0:on 820524,during Routine surveillance,16 Valves Discovered Missing from Surveillance Procedures SP(o)4.6.1.1A1.Valves Omitted from Surveillance inadvertently.In-depth Investigation of Piping Sys Underway (← links)
- 05000311/LER-1982-024-03, /03L-0:on 820328,sample Results from 21 & 22 Boric Acid Storage Tanks & Boron Injection Tank Indicated Boric Acid Concentrations Below Spec Limit.No Cause Determined. Boric Acid Added (← links)
- 05000311/LER-1982-069-03, /03L-0:on 820724,control Operator Observed Erratic Operation of Reactor Coolant Pump 23 Flow Channel Iii.Caused by Flow Transmitter Ferrite Slug Failure.Failed Transmitter Replaced & Channel Recalibr (← links)
- 05000311/LER-1982-068-03, /03L-0:on 820722,control Room Operator Received Indication of Malfunction of Containment Plant Monitoring Sys.Caused by Improper Screw Adjustment Resulting in Binding of Channel 2R11A Filter Paper.Screws Adjusted (← links)
- 05000311/LER-1982-064-03, /03L-0:on 820717,ECCS Heat Tracing Circuits 2610A & 2608B Found Reading Less than Tech Specs.Caused by Broken Wire in Circuit 2610A Control Panel.Wire Trimmed & Reconnected & Heat Tracing Circuit Replaced (← links)
- 05000311/LER-1982-063-03, /03L-0:on 820718,4-kV Supply Breaker 21 ASD Tripped open,de-energizing 2A Vital Bus,Starting 2A Diesel Generator & de-energizing Bus Loads.Caused by Failed Card File Assembly.Assembly Replaced (← links)
- 05000311/LER-1982-062-03, /03L-0:on 820715,discovered That Annual Cycling of Testable Automatic Valves in Fire Suppression Sys Not Performed Since 810116.Caused by Failure to Issue New Procedure Due to Prematurely Canceled Computer Insp Order (← links)
- 05000311/LER-1982-067-03, /03L-0:on 820720,during Channel Testing,Control Room Operator Discovered That Steam Generator 24 Feedwater Channel 2 Flow Indication Was Operating Erratically.Caused by Failure of Flow Transmitter.Transmitter Replaced (← links)
- 05000311/LER-1982-065-03, /03L-0:on 820720,zero Svc Water Flow to Containment Fan Coil Unit 24 Discovered During Surveillance Testing.Caused by Failure of Actuator on Valve 24SW223.Rod End Bearing Assembly Replaced (← links)
- 05000311/LER-1982-066-03, /03L-0:on 820720,during Monthly Channel Functional Test for Steam Generator 21 Steam Flow Channel Ii,High Trip Setpoint Exceeded Tech Spec.Caused by Failed Capacitors. Capacitors Replaced (← links)
- 05000311/LER-1982-056-03, /03L-0:on 820701,personnel Discovered Inner Door Seal Leakage in 100-ft Elevation Containment Air Lock.Caused by Door Slamming,Forcing Seal Out of Proper Position.Seal Repositioned (← links)
- 05000311/LER-1982-057-03, /03L-0:on 820630,feedwater Pump 22 Tripped Causing Operator to Reduce Turbine Load & Commence Control Rod Insertion.Caused by Decrease in Suction Pressure Associated W/Placing Feedwater Heater 26 in Svc (← links)
- 05000311/LER-1989-016, :on 891014,3 of 4 MSIVs Failed to Close within 5 S,Per Requirement of Tech Spec 4.7.1.5.Caused by Design Error.Msivs Will Be Modified to Eliminate Concerns Associated W/Condensation Collection (← links)
- 05000311/LER-1982-054-03, /03L-0:on 820623,steam Generator 21 Steam Pressure Channel II Observed Reading Low.Caused by Failed Pressure Transmitter.New Transmitter Installed & Calibr (← links)
- 05000311/LER-1982-050-03, /03L-0:on 820617,svc Water Flow to 21,22 & 23 Containment Fan Coil Units Less than Amount Required by Tech Specs.Caused by Oysters Plugging SW57 Valves.Oysters Removed by Cycling or Disassembly of Valves (← links)
- 05000311/LER-1982-051-03, /03L-0:on 820618,elevation Containment Air Lock Seal Leakage Was Greater than Tech Spec Limit.Caused by Improperly Positioned Seal.Seal Repositioned (← links)
- 05000311/LER-1990-030, :on 900703,ESF Actuation Containment Purge/ Pressure Vacuum Relief Sys Isolation Occurred After Channel Function Not Placed in Block.Caused by Personnel Error. Individuals Involved Held Accountable (← links)
- 05000311/LER-1990-027, :on 900628,determined That ESF Signal Actuation 2R41C Channel Failed Low Due to 2R45 Interlock.Caused by Design/Equipment Concerns.Engineering Investigated Concerns & Uninterruptable Power Sys Installed (← links)
- 05000311/LER-1990-026, :on 900609,radiation Monitoring Sys Channel 2R12B Failed Low.Caused by Design/Equipment Concerns.Failed Components Replaced & Pins Connecting Backplane Replaced W/Longer Pins (← links)
- 05000311/LER-1982-052-03, /03L-0:on 820618,steam Generator 21 Steam Flow Channel II Discovered Reading Low.Caused by Instrument Drift.Transmitter Recalibr & Returned to Svc (← links)
- 05000311/LER-1982-049-03, /03L-0:on 820617,containment Fan Coil Units 21 & 25 Failed to Meet Svc Water Flow Requirements.Caused by Valve 21SW57 Tube Bundle Plugged W/American Oysters in Unit 21.Unit 25 Failed Due to Cracked Solder Joint (← links)
- 05000311/LER-1982-048-03, /03L-0:on 820606,red Tag Discovered Missing from post-LOCA Sampling Sys Containment Isolation Valve.Tagging Request Form Also Missing.Tag Inadvertently Knocked Off & Tagging Request Form Lost.Form Reissued & Tag Replaced (← links)
- 05000311/LER-1982-042-03, /03L-0:on 820518,number 21 Operational Temp Channel Trip Actuated Higher than Tech Specs.Caused by Failure of Contacts on lead/lag-derivative Switch to Complete Trip Circuit.Contacts Cleaned (← links)
- 05000311/LER-1982-044-03, /03L-0:on 820518,operator Discovered Leakage Rate of 130-ft Elevation Containment Air Lock Exceeded Tech Spec Limits.Caused by Improperly Positioned Inner Door Seal. Inner Door Seal Properly Positioned (← links)
- 05000311/LER-1982-046-03, /03L-0:on 820527,during Routine Surveillance,Less than Required Svc Water Flow to Containment Coil Unit 23 Discovered.Caused by Oysters Plugging Valve Tube Bundle 23SW57.Oysters Removed & Svc Water Flow Returned to Normal (← links)
- 05000311/LER-1982-045-03, /03L-0:on 820522,operator Discovered Leakage Rate of 100-ft Elevation Containment Air Lock Exceeded Tech Spec Limits.Caused by Failed Inner Door Latch Mechanism.Latch Mechanism Repaired & Tested (← links)
- 05000311/LER-1982-039-01, /01T-0:on 820526,100-gpm Svc Water Leak in Containment Fan Coil Unit 21 Motor Cooler Discovered.Caused by Failed Motor Cooler Seam Weld.Failed Motor Cooler & Fan Motor Replaced & Tested (← links)
- 05000311/LER-1982-037-03, /03L-0:on 820508,containment Plant Vent Radioactivity Monitor Low Flow Alarm Received Rendering Particulate & Gaseous Radioactivity Channels Inoperable. Caused by 2VC908 Drifting Closed Due to Loosened Packing (← links)
- 05000311/LER-1982-040-01, /01P:on 820519,svc Water Leak Discovered Inside Containment Bldg on Containment Fan Coil Unit 22.Rept of Event Overlooked Due to Another Incident Occuring Concurrently on Coil Unit.Leak Isolated (← links)
- 05000311/LER-1982-021-03, /03L-0:on 820320,while Performing Surveillance Procedure SP(O)4.6.1.3 on 100 Ft Elevation Containment Air Lock,Leakage Rate Exceeded Limit of 0.05 La at Design Pressure of 47.0 Psig.Caused by Loose Chain on Inner Door (← links)
- 05000311/LER-1982-022-03, /03L-0:on 820326,operator Attempted to Start Auxiliary Bldg Exhaust Fan 21.Fan Would Not Start & Declared Inoperable.Caused by Automatic Trip Shutter Which Had Not Been Reset When Fan Circuit Breaker Was Racked in (← links)
- 05000311/LER-1981-036-03, /03L-0:on 810606,pressurizer Pressure Channel 1 Indicated Greater than Max Allowable Tolerance.Caused by Pressure Transmitter 2PT455 Out of Spec.Unit Calibr & Returned to Svc (← links)
- 05000311/LER-1982-020-03, /03L-0:on 820313,during Performance of Surveillance Procedure SP(O)4.0.5.p,auxiliary Feedwater Pump 23 Would Not Attain Specified Min Speed of 3,500 Rpm.Caused by Leakage Past Overspeed Ball Check Valve (← links)
- 05000311/LER-1982-018-03, /03L-0:on 820304,steam Generator 24 Feedwater Channel 2 Flow Indicator Failed.Caused by Failure of Force Motor in Flow Transmitter.Transmitter Properly Repaired, Calibr & Returned to Svc (← links)
- 05000311/LER-1982-019-03, /03L-0:on 820307,undervoltage Condition in Safeguards Equipment Control Cabinet Caused Mod 1 2A Sec Actuation.Caused by Failure of Card File Assembly.Card File Assembly Replaced & Loads Secured.Sys Returned to Svc (← links)
- 05000311/LER-1982-038-03, /03L-0:on 820503,during Routine Surveillance,Svc Water Flow to Containment Fan Coil Unit 23 Discovered Less than Tech Specs.Caused by Flow Transmitter Plugged W/Silt. Transmitter Blown Down (← links)
- 05000311/LER-1982-035-03, /03L-0:on 820501,on Two Occasions,Svc Water Flow to Containment Fan Coil Unit 22 Was Less than Required by Tech Specs.First Caused by Stuck Valve 22sw57;second Caused by Improper Valve Position Due to Loose Nut on Valve Stem (← links)
- 05000311/LER-1982-036-03, /03L-0:on 820503,containment Fan Coil Unit 21 Failed to Start in Low Speed.Caused by Failed Control Board Pushbutton.Pushbutton Repaired (← links)
- 05000311/LER-1982-031-03, /03L-0:on 820424,2C Vital Bus Infeed Breaker 22CSD tripped,de-energizing 2C Vital Bus.Caused by Known Noise Problem W/Safeguards Equipment Control Sys.Vital Bus 2C re-energized.Design Change Request 2EC1387 Issued (← links)
- 05000311/LER-1982-029-03, /03L-0:on 820423,containment Sump Monitoring Sys Declared Inoperable Due to Containment Sump Pumps Running Continuously Since Previous Day.Caused by Closed Pump Discharge Valve 2WL16 on Breaker 3 in Cabinet 26RC7 (← links)
- 05000311/LER-1982-033-03, /03L-0:on 820424,control Room Emergency Air Conditioning Sys Fan 21 Tripped & Would Not Start.Caused by Failed Overload Contactor.Contactor Replaced (← links)
- 05000311/LER-1982-034-03, /03L-0:on 820501,during Routine Operation,Snubber S23FWSN15A Seized & Declared Inoperable.Cause Under Investigation.Snubber Replaced (← links)
- 05000311/LER-1982-032-03, /03L-0:on 820428,steam Generator Feedwater Pump 21 Tripped,Causing Axial Flux to Go Outside Target Band.Control Rod Low Low Insertion Limit Alarm Received.Caused by Attempted Sabotage (← links)
- 05000311/LER-1982-029-01, /01P-0:svc Water Leak Discovered Inside Containment Bldg on Containment Fan Coil Unit 21.Leak Rate Was 100 Gallons Per Minute.Investigation in Progress (← links)
- 05000311/LER-1982-027-03, /03L-0:on 820418,RCS Water Inventory Not Performed within Tech Spec 72-h Time Interval.Changes in Xenon Reactivity Precluded Performance of Surveillance.Sump Pump & Radioactivity Monitor Surveillance Increased (← links)
- 05000311/LER-1982-023-03, Elevation Air Lock Inner Door Seal Pressure Failed Twice to Meet Required Pressure.First Event Caused by Plugged Seal Air Pressurization Line;Second by Leak Inner Door Seals (← links)
- 05000311/LER-1982-023, Forwards Corrected LER 82-023/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-030, Corrected Copy of LER 82-030/03L-0:on 820417,containment Fan Coil Unit 24 Supply Breaker Tripped Due to Overcurrent Condition.Caused by Improperly Positioned Guillotine Damper. Unit Lubricated & Guillotine Damper Repositioned (← links)
- 05000311/LER-1982-030-03, /03L-0:on 820417,24 Containment Fan Coil Unit Supply Breaker Tripped.Caused by Improperly Positioned Guillotine Damper Resulting in Overcurrent Condition.Unit Lubricated & Guillotine Damper Repositioned (← links)
- 05000311/LER-1982-026-03, /03L-0:on 820418,during Routine Operation,Control Room Operator Noted RPI 1C4 More than 12 Steps Lower than Bank Demand Position Indicator.Caused by Instrument Drift. RPI Recalibr & Tested Satisfactorily (← links)
- 05000311/LER-1982-026, Forwards LER 82-026/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-017-03, /03L-0:on 820228,while Starting Containment Fan Coil Unit 22,operator Found Svc Water Flow Indicating Zero. Caused by Low Svc Water Flow.Valve 22SW223 Exercized & Action Statement Terminated (← links)
- 05000311/LER-1982-015-03, /03L-0:on 820221,reactor Coolant Leak Rate Surveillance 4.4.7.2.d Was Not Performed.Caused by 820219 Reactor Trip,Precluding Necessary Steady State Condition for Test.Surveillance Performed When Conditions Stabilized (← links)
- 05000311/LER-1982-016-03, /03L-0:on 820226 & 27,axial Power Distribution Drifted Out of Power Band.Caused by Clogged Screens Tripping Circulator.Power Restored & Action Statement Terminated (← links)
- 05000311/LER-1982-016, Forwards LER 82-016/03L-0.Detailed Event Rept Encl (← links)
- 05000311/LER-1982-014-03, /03L-0:on 820219,steam Generator 21 Level Channel 2 Read 20% Higher than Channels 3 & 4.Channel 2 Declared Inoperable.Cause Unknown.Transmitter Tested & Found Satisfactory.Sensing Lines Blown Down to Remove Solids (← links)
- 05000311/LER-1982-014, Forwards LER 82-014/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-013-03, L-0:on 820215,shift Supervisor Informed That Two 4-inch Core Bores Opened on 78-ft Elevation Between Mechanical & Electrical Penetration Areas.No Fire Watch Posted.Caused by Inadvertently Posting Watch on Wrong Unit (← links)
- 05000311/LER-1982-013, Forwards LER 82-013/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-005-03, /03L-0:on 820121,during Performance of M3T Maint Surveillance Test Undervoltage Relay on 2C Vital Bus Actuated at 5.5 Volts Instead of 77.3 Volt Trip Setpoint Value.No Defects Found.Relay Recalibr (← links)
- 05000311/LER-1982-005, Forwards LER 82-005/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-095-03, /03L-0:on 810828,pressurizer Pressure Protection Channel Found Tripped & Low Pressure Annunciator Alarm Activated.Caused by Protection Channel Malfunction.Universal Board in Solid State Protection Sys Train a Replaced (← links)
- 05000311/LER-1981-095, Forwards LER 81-095/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-090-01, /01T-0:on 810913,during Routine Insp,Svc Water Found Leaking at Rate of Approx 0.5 Gpm from Primary Coil on Containment Fan Coil Unit.Caused by Pinhole Leak in Bottom Primary Coil.Leaking Cooling Coil Flanged Off (← links)
- 05000311/LER-1981-090, Forwards LER 81-090/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-093-03, /03L-0:on 810825,auxiliary Alarm Annunciator Failed Causing Containment Sump Level Monitoring Sys to Be Declared Inoperable.Caused by Failure of Integrated Circuit Chips.Circuit Chips Replaced (← links)
- 05000311/LER-1981-093, Forwards LER 81-093/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1990-024, :on 900521,T-handle Instrument Isolation Valve Discovered Closed,Resulting in Isolation of Liquid Radwaste Effluent Line Monitor 2R18.Caused by Personnel Error.Valve Added to Tagging Request Info Sys Data Base (← links)
- 05000311/LER-1990-021, :on 900515,radiation Monitoring Sys Channel 2R12A Failed Resulting in ESF Signal Actuation for Containment Purge/Pressure Vacuum Relief Sys Isolation. Caused by Equipment/Design Concerns (← links)
- 05000311/LER-1990-022, :on 900522,radiation Monitoring Sys Channel 2R12A Failed Low.Probably Caused by Equipment/Design Concerns.Anticipates That Several Sys Design Mods Will Eliminate Spurious ESF Actuation Signals (← links)
- 05000311/LER-1990-023, :on 900516,4 Kv Vital Bus Deenergized During 2A Safeguard Equipment Control 18-month Surveillance.Caused by Personnel Error.Personnel Reprimanded & Procedure M3U Revised (← links)
- 05000311/LER-1990-018, :on 900511,containment Purge/Pressure Vacuum Relief Sys Actuated.Caused by Design/Equipment Failures. Lighting Transformer 2HL Replaced (← links)
- 05000311/LER-1990-019, :on 900511,ESF Actuation Occurred When Radioactive Noble Gas Monitor 2R12A RMS Channel Spiked High. Caused by Equipment/Design Failures.Several Sys Design Mods Will Eliminate Spurious Actuation (← links)
- 05000311/LER-1990-017, :on 900501,inadvertent Manual Safety Injection Occurred Due to Personnel Error.Technician Made Assumption Re Wiring Changes Performed.Train B Wiring Corrected & Deficiency Rept Initiated (← links)
- 05000311/LER-1990-016, :on 900420,discovered That Containment Pressure Relief Conducted W/Associated Radiation Monitoring Sys Channels Inoperable.Caused by Inoperability of Control Room Pump Low Flow Alarm.Procedures Revised (← links)
- 05000311/LER-1990-015, :on 900415,ESF Signal Actuation for Containment Ventilation Isolation Occurred.Caused by Procedural Inadequacy.Setpoint Setting Modified & Detector Time Constant Extended from 20 to 40 (← links)
- 05000311/LER-1990-014, :on 900419,ESF Actuation Signal for Containment Ventilation Isolation Occurred.Caused by Procedural Inadequacy.Setpoint Setting Modified & Detector Time Constant Extended from 20 to 40 (← links)
- 05000311/LER-1990-013-01, :on 900416,discovered That Setpoint for 2R11A & 2R12A Monitors for Radiation Monitoring Sys Channels Not Changed During Last Refueling Outage.Caused by Inadequate Administrative Control.Procedure Revised (← links)
- 05000311/LER-1990-012, :on 900403,radiation Monitoring Sys Plant Vent Radioactive Noble Gas Monitor 2R41C Lost Power Resulting in Isolation in Containment purge/pressure-vacuum Relief Sys. Cause Not Determined (← links)
- 05000311/LER-1989-024-02, :on 891201,vital 4-kV Bus 2C Deenergized Due to Activation of Bus Differential Relay Scheme,Causing ESF Actuation.Caused by Scaffolding Improperly Secured in Switchgear Rooms.Scaffolding Removed (← links)
- 05000311/LER-1982-010-03, /03L-0:on 820201,discrepancy Between Individual Rod Position Indicator (Irpi) & Control Rod Bank Demand Indicator for Rod 2C2 Exceeded 12 Steps in Either Direction. Caused by Incorrect Calibr of Irpi.Irpi Calibr (← links)
- 05000311/LER-1982-010, Forwards LER 82-010/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-011-03, /03L-0:on 820205,during Radiological Survey of Hot Laundry Trailer Area,Technician Discovered Lint from Dryer Exhaust of Trailer B Revealing Traces of Cs-137,Co-60 & Co-58.New Trailer & Lint Collector Installed (← links)
- 05000311/LER-1982-011, Forwards LER 82-011/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-008-03, /03L-0:on 820128,overpower Delta T Indication for Channel 21 Failed High.Caused by Signal Summator 2T-M412E Having No Output Due to Failed Capacitors. Five Capacitors Replaced (← links)
- 05000311/LER-1982-008, Forwards LER 82-008/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-009-03, /03L-0:on 820129,air Particulate Detector Pump Low Flow Alarm Annuniciated.Caused by Incorrect Normal Flow Valve Lineup to Pump.Pump Removed from Normal Flow & Placed in Backup Flow Lineup (← links)
- 05000311/LER-1982-009, Forwards LER 82-009/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-006-03, /03L-0:on 820128,svc Water Flow Indicator Indicated No Flow Condition.Caused by Svc Water Discharge Valve 22SW223 Being Stuck Shut.Valve Opened,Locally Tested & Returned to Svc (← links)
- 05000311/LER-1982-006, Forwards LER 82-006/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-002-03, /03L-0:on 820111,2A1 Battery Charger Tripped, Was Reset & Tripped Again.No Problem Found.Subsequent Trip Caused by Difference Between Battery Voltage & Battery Charger Voltage Setting.Personnel Instructed (← links)
- 05000311/LER-1982-003-03, /03L-0:on 820112,during Routine Calibr Testing, Radiation Monitor 2R11A Found Out of Calibr.Caused by Instrument Drift.Monitor Recalibr & Tested Satisfactorily (← links)
- 05000311/LER-1982-003, Forwards LER 82-003/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1982-001-03, /03L-0:on 820110,steam Generator 24 Pressure Channel 4 Failed High.Caused by Ventilation Damper Sticking Open,Freezing Pressure Sensing Line.Damper Freed & Closed. Line Thawed (← links)
- 05000311/LER-1981-091-03, /03X-1:on 810817,unit Attained 85% Rated Thermal Power.Turbine Overspeed Protection Surveillance Required within 24-hr of Attaining 85% Power Was Overlooked.Personnel Counseled & Reminded of 24-hr Requirements (← links)
- 05000311/LER-1981-091, Forwards Corrected LER 81-091/03X-1.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-130-03, /03L-0:on 811219 & 21,axial Flux Difference Shifted Outside Target Band.Caused by Simultaneous Downward Rod Push & Power Decrease.Flux Stabilized & Action Statement Terminated (← links)
- 05000311/LER-1981-130, Forwards LER 81-130/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-131-03, /03L-0:on 811228,low Reading Noticed on 24 Reactor Coolant Loop Flow Channel 2.Channel Declared Inoperable. Caused by Failure of Flow Transmitter.Flow Transmitter Replaced & Calibr Satisfactorily (← links)
- 05000311/LER-1981-131, Forwards LER 81-131/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-128-03, /03L-0:on 811217,pressurizer Low Level Heaters Off Alarm Annunciated,Letdown Isolation Valves Closed & Pressurizer Pressure Fell Below Limit.Caused by Fuse Failure in Bistable Module.Fuse Replaced (← links)
- 05000311/LER-1981-128, Forwards LER 81-128/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-126-03, /03L-0:on 811212,instrument Points on Radiation Monitor 2R12A Failed High.Cause Unknown.Monitor Bench Tested Satisfactorily,Batteries Replaced & Monitor Reinstalled. Setpoints Reinstated & Tested (← links)
- 05000311/LER-1981-126, Forwards LER 81-126/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-127-03, /03L-0:on 811215,operator Received Diesel Generator 2A Urgent Trouble Alarm.Caused by Failure of Prelubrication Oil Heater.Diesel Run Periodically to Maintain Oil Temp Above 110 F Until New Heater Is Installed (← links)
- 05000311/LER-1981-125-03, /03L-0:on 811209,dc Alarm Produced on Auxiliary Alarm Typewriter.Caused by Internal Component Failure in 125-volt Dc Breaker.Breaker Replaced (← links)
- 05000311/LER-1981-127, Forwards LER 81-127/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-125, Forwards LER 81-125/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-124-03, /03L-0:on 811123,during M3J Maint Test, Undervoltage Relay on 2C Vital Bus Was Discovered Actuating at 35% Trip Setpoint Value.Caused by Mechanical Sticking of Relay.Relay Cleaned & Tested Satisfactorily (← links)
- 05000311/LER-1981-124, Forwards LER 81-124/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-122-03, /03L-0:on 811119 & 1207,leakage Rate Exceeded Limit at 130-ft Elevation Containment Air Lock.Caused by Misalignment of Inner Door Latch Mechanism & Failure of Latch Bearing.Latch Bearing Replaced (← links)
- 05000311/LER-1981-122, Forwards LER 81-122/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-123-03, /03L-0:on 811119,after Satisfactory Performance of M3B Surveillance test,2A Safeguards Equipment Cabinet Would Not Reset & Vital Bus Tripped,Stripping Bus of Loads. Caused Not stated.SK6 Input Reset Relay Replaced (← links)
- 05000311/LER-1981-123, Forwards LER 81-123/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-121-03, /03L-0:on 811118 & 19,control Operator Noticed Individual Rod Position Indicator & Control Rod Bank Demand Indicator for Rod 2SB2 in Disagreement Greater than Tech Specs.Cause Not Stated.Meter Movemement Recalibr & Replaced (← links)
- 05000311/LER-1981-121, Forwards LER 81-121/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-119-03, /03L-0:on 811111-28,quadrant Power Tilt Ratio Calculations (QPTR) Determined at 1.03 & Channel N-43 Declared Inoperable.Caused by Malfunctions in Power Range Channel N-43 Nuclear Instrumentation (← links)
- 05000311/LER-1981-119, Forwards LER 81-119/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-120-03, /03L-0:on 811113,during Surveillance Test on Solid State Protection Sys Train B,Logic Sys for Reactor Coolant Loop Flow Failed Logic Test.Caused by Failure of A303 Universal Circuit Board.Circuit Board Replaced (← links)
- 05000311/LER-1981-120, Forwards LER 81-120/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-115-01, /01T-0:on 811125,svc Water Found Leaking at 0.5 Gpm from Second from Top Primary Cooling Coil on Containment Fan Coil Unit (Cfcu).Cfcu Declared Inoperable on 811127. Caused by Equipment Failure.Coil Repaired (← links)
- 05000311/LER-1981-115, Forwards LER 81-115/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-118-03, /03L-0:on 811110,when Steel Plug Was Being Removed to Install Thermocouple on Svc Water Header,Plug Sheared Off Resulting in Leak of 90 Psi Svc Water.Caused by Removal of Plug from Penetration W/O Thermocouple Well (← links)
- 05000311/LER-1981-118, Forwards LER 81-118/-3L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-117-03, /03L-0:on 811110,svc Water Inlet Valve Position Indicator for One Containment Fan Coil Unit Indicated Not Open & Low Water Flow for Another.First Caused by Defective Limit Switch & Second by Silt in Flow Transmitter Line (← links)
- 05000311/LER-1981-117, Forwards LER 81-117/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-116-03, /03L-0:on 811107,charging Pump Tripped Electrically on long-term Overcurrent During Operation & Attempted Restart.Caused by Broken Impeller Shaft.Rotating Assembly Replaced (← links)
- 05000311/LER-1981-116, Forwards LER 81-116/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-114-01, /01T-0:on 811119,reactor Coolant Leakage Exceeded Tech Spec Limit.Caused by Svc Water Leaking from Pinhole in Containment Fan Coil Unit 22 Motor Cooler.Motor Cooler Replaced (← links)
- 05000311/LER-1981-114, Forwards LER 81-114/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-113-31, /03L-0:on 811028,control Console Log Reading for Containment Spray Additive Tank Level Found Out of Spec & Declared Inoperable.Caused by Personnel Failure to Detect Instrument Fluctuation.Tank Filled & Level Adjusted (← links)
- 05000311/LER-1981-113, Forwards LER 81-113/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-112-03, /03L-0:on 811028,100-ft Elevation Containment Airlock Found Inoperable.Caused by Inside Door Seal Falling Out of Groove.Seal Replaced (← links)
- 05000311/LER-1981-112, Forwards LER 81-112/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-069-03, /03L-0:on 810721,steam Generator 24 Steam Flow Channel 1 Discovered Reading High & Declared Inoperable. Caused by Erroneous Signal Due to High Multiplier 2FM-542B on Low End.Multiplier Adjusted & Channel Returned to Svc (← links)
- 05000311/LER-1981-069, Forwards LER 81-069/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1989-015, :on 890918,discovered That Channel Calibr for Two Containment Wide Range Pressure post-accident Channels Not Completed within Required Time Frame.Caused by Personnel Error.Mmis Data Base Revised (← links)
- 05000311/LER-1990-011, :on 900301,containment Ventilation Isolation Signal (ESF) Occurred.Caused by Equipment Failure.Frayed Wire Repaired & Functional Surveillance Requirement Modified to Include Insp of Wire (← links)
- 05000311/LER-1981-086-01, /01T-0:on 810903,after Engineering Review,Number 21 Steam Flow Channels 1 & 2 Found Out of Calibr.Caused by Excessive Carryover from Steam Generator 21.Flow Channel 1 Recalibr & Returned to Svc (← links)
- 05000311/LER-1981-086, Forwards LER 81-086/01T-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-104-01, /01X-2:on 811006,penetration Canister 2-41 Found Unprotected from Potential Fire Damage.Caused by Neglect of Wrapping Requirement by Contractor Personnel.Fire Watches Posted & Required Wrappings Properly Accomplished (← links)
- 05000311/LER-1981-104, Forwards LER 81-104/01X-02.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-111-03, /03L-0:on 811022,during Boration Process, Pressurizer Pressure Dropped Below DNB Parameter for 5 Minutes.Caused by Injection of Excessive Amount of Boron in Rcs.Personnel Counseled Re Correct Procedure (← links)
- 05000311/LER-1981-111, Forwards LER 81-111/03L-0.Detailed Event Analysis Encl (← links)
- 05000311/LER-1981-110-03, /03L-0:on 811026,while Attempting to Place Containment Fan Coil Units 21 & 23 in Low Speed Accident Mode,Units Declared Inoperable Due to Low Flow Indication. Caused by Silt in Transmitter Sensing Lines (← links)
- ML16081A369 (redirect page) (← links)
- 05000272/LER-2016-006-01, Technical Specification for Containment Integrity Not Met (← links)
- 05000311/LER-2016-006, Regarding Automatic Reactor Trip Due to Trip of the 21 Reactor Coolant Pump (← links)
- 05000272/LER-2016-005, Regarding Instrumentation Channels Inoperable for Longer than Allowed by Technical Specification (← links)
- 05000272/LER-2016-004, Regarding Containment Fan Coil Units Inoperable for Longer than Allowed by Technical Specification (← links)
- 05000311/LER-2016-005, Regarding Automatic Reactor Trip Due to Main Generator Protection Trip (← links)
- 05000272/LER-2016-001, Regarding Unanalyzed Condition Due to Degraded Reactor Baffle to Former Bolts (← links)
- 05000311/LER-2016-004, Regarding Auxiliary Feedwater Pump Auto Start (← links)
- 05000311/LER-2016-003, Regarding Automatic Reactor Trip Due to Main Generator Protection Trip (← links)
- 05000311/LER-2016-002, Regarding Automatic Reactor Trip Due to Main Turbine Trip (← links)