Pages that link to "05000416/LER-2019-001, Automatic Reactor Shutdown Due to Activation of Generator Lockout"
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The following pages link to 05000416/LER-2019-001, Automatic Reactor Shutdown Due to Activation of Generator Lockout:
Displayed 10 items.
- ML19112A058 (redirect page) (← links)
- 05000416/LER-2019-006-01, Failure to Meet Technical Specification 5.5.7 for B Train Standby Gas Charcoal Filter Media Efficiency (← links)
- 05000416/LER-2019-003-01, Secondary Containment Personnel Door Failure (← links)
- 05000416/LER-2019-006, Failure to Meet Technical Specification 5.5.7 for Division II Standby Gas Charcoal Filter Media Efficiency (← links)
- 05000416/LER-2019-005, Primary Containment Personnel Airlock Potential Loss of Safety Function Due to Inadequate Door Closure (← links)
- 05000416/LER-2019-004, Loss of High Pressure Core Spray Due to Instrument Inverter Failure (← links)
- 05000416/LER-2019-003, Secondary Containment Personnel Door Failure Due to Broken Hinges (← links)
- 05000416/LER-2019-001-01, Automatic Reactor Shutdown Due to Activation of Generator Lockout (← links)
- 05000416/LER-2019-002, Manual Reactor Shutdown Due to Loss of Service Water (← links)
- 05000416/LER-2019-001 (redirect page) (← links)
- 05000416/LER-2002-002 (← links)
- 05000416/LER-2001-004 (← links)
- 05000416/LER-2001-003 (← links)
- 05000416/LER-2001-002 (← links)
- 05000416/LER-2001-001 (← links)
- IR 05000416/2019002 (← links)
- IR 05000416/2019004 (← links)
- 05000416/LER-1982-004, Forwards LER 82-004/03L-0 (← links)
- 05000416/LER-1982-003, Forwards LER 82-003/03L-0 (← links)
- 05000416/LER-1982-002, Forwards LER 82-002/01T-0 (← links)
- 05000416/LER-1982-001, Forwards LER 82-001/01T-0 (← links)
- 05000416/LER-1982-090, Forwards LER 82-090/99X-0 (← links)
- 05000416/LER-1982-088, Forwards LER 82-088/03L-0 (← links)
- 05000416/LER-1982-089, Forwards LER 82-089/03L-0 (← links)
- 05000416/LER-1982-076, Forwards LER 82-076/03L-0 (← links)
- 05000416/LER-1982-082, Forwards LER 82-082/03L-0 (← links)
- 05000416/LER-1982-074, Forwards LER 82-074/03L-0 (← links)
- 05000416/LER-1982-073, Forwards LER 82-073/03L-0 (← links)
- 05000416/LER-1982-085, Forwards LER 82-085/03L-0 (← links)
- 05000416/LER-1982-083, Forwards LER 82-083/03L-0 (← links)
- 05000416/LER-1982-086, Forwards LER 82-086/03L-0 (← links)
- 05000416/LER-1982-072, Forwards LER 82-072/01T-0 (← links)
- 05000416/LER-1982-068, Forwards LER 82-068/03L-0 (← links)
- 05000416/LER-1982-064, Forwards LER 82-064/03L-0 (← links)
- 05000416/LER-1982-079, Forwards LER 82-079/03L-0 (← links)
- 05000416/LER-1982-052, Forwards LER 82-052/03L-0 (← links)
- 05000416/LER-1982-062, Forwards LER 82-062/03L-0 (← links)
- 05000416/LER-1982-055, Forwards LER 82-055/03L-0 (← links)
- 05000416/LER-1982-054, Forwards LER 82-054/03L-0 (← links)
- 05000416/LER-1982-056, Forwards LER 82-056/03L-0 (← links)
- 05000416/LER-1982-057, Forwards LER 82-057/03L-0 (← links)
- 05000416/LER-1983-013, Forwards LER 83-013/99X-0 (← links)
- 05000416/LER-1983-020, Forwards LER 83-020/03L-0 (← links)
- 05000416/LER-1983-005, Forwards LER 83-005/03L-0 (← links)
- 05000416/LER-1982-187, Forwards LER 82-187/99X-0 (← links)
- 05000416/LER-1983-010, Forwards LER 83-010/99X-0 (← links)
- 05000416/LER-1983-006, Forwards LER 83-006/03L-0 (← links)
- 05000416/LER-1982-164, Forwards LER 82-164/03L-0 (← links)
- 05000416/LER-1982-152, Forwards LER 82-152/03L-0 (← links)
- 05000416/LER-1982-151, Forwards LER 82-151/03L-0 (← links)
- 05000416/LER-1982-148, Forwards LER 82-148/03L-0 (← links)
- 05000416/LER-1982-044, Forwards LER 82-044/03L-0 (← links)
- 05000416/LER-1982-042, Forwards LER 82-042/03L-0 (← links)
- 05000416/LER-1982-051, Forwards LER 82-051/03L-0 (← links)
- 05000416/LER-1982-049, Forwards LER 82-049/03L-0 (← links)
- 05000416/LER-1982-045, Forwards LER 82-045/01T-0 (← links)
- 05000416/LER-1982-046, Forwards LER 82-046/03L-0 (← links)
- 05000416/LER-1982-008, Forwards LER 82-008/99X-1 (← links)
- 05000416/LER-1982-034, Forwards LER 82-034/01T-0 (← links)
- 05000416/LER-1982-039, Forwards LER 82-039/03L-0 (← links)
- 05000416/LER-1982-037, Forwards LER 82-037/03L-0 (← links)
- 05000416/LER-1982-038, Forwards LER 82-038/03L-0 (← links)
- 05000416/LER-1982-035, Forwards LER 82-035/03L-0 (← links)
- 05000416/LER-1982-030, Forwards LER 82-030/03L-0 (← links)
- 05000416/LER-1982-028, Forwards LER 82-028/01T-0 (← links)
- 05000416/LER-1982-029, Forwards LER 82-029/03L-0 (← links)
- 05000416/LER-1982-026, Forwards LER 82-026/03L-0 (← links)
- 05000416/LER-1982-022, Forwards LER 82-022/03L-0 (← links)
- 05000416/LER-1982-025, Forwards LER 82-025/03L-0 (← links)
- 05000416/LER-1982-023, Forwards LER 82-023/03L-0 (← links)
- 05000416/LER-1982-024, Forwards LER 82-024/03L-0 (← links)
- 05000416/LER-1982-019, Forwards LER 82-019/01T-0 (← links)
- 05000416/LER-1982-017, Forwards LER 82-017/03L-0 (← links)
- 05000416/LER-1982-016, Forwards LER 82-016/03L-0 (← links)
- 05000416/LER-1982-015, Forwards LER 82-015/03L-0 (← links)
- 05000416/LER-1982-010, Forwards LER 82-010/03L-0 (← links)
- 05000416/LER-1982-009, Forwards LER 82-009/03L-0.Detailed Event Analysis Submitted (← links)
- 05000416/LER-1982-012, Forwards LER 82-012/01T-0 (← links)
- 05000416/LER-1982-014, Forwards LER 82-014/03L-0 (← links)
- 05000416/LER-1982-013, Forwards LER 82-013/03L-0 (← links)
- 05000416/LER-1983-027, Forwards LER 83-027/99X-0 (← links)
- 05000416/LER-1983-029, Forwards LER 83-029/03L-0 (← links)
- 05000416/LER-1983-026, Forwards LER 83-026/03L-0 (← links)
- 05000416/LER-1983-033, Forwards LER 83-033/99X-0 (← links)
- 05000416/LER-1983-038, Forwards LER 83-038/03L-0 (← links)
- 05000416/LER-1983-036, Forwards LER 83-036/03L-0 (← links)
- 05000416/LER-1983-016, Forwards LER 83-016/03L-0 (← links)
- 05000416/LER-1983-035, Forwards LER 83-035/01T-0 (← links)
- 05000416/LER-1983-025, Forwards LER 83-025/03L-0 (← links)
- 05000416/LER-1983-031, Forwards LER 83-031/99X-0 (← links)
- 05000416/LER-1983-028, Forwards LER 83-028/03L-0 (← links)
- 05000416/LER-1983-022, Forwards LER 83-022/03L-0 (← links)
- 05000416/LER-1983-024, Forwards LER 83-024/03L-0 (← links)
- 05000416/LER-1983-023, Forwards LER 83-023/03L-0 (← links)
- 05000416/LER-1983-014, Forwards LER 83-014/03L-0 (← links)
- 05000416/LER-1983-012, Forwards LER 83-012/03L-0 (← links)
- 05000416/LER-1983-018, Forwards LER 83-018/99X-0 (← links)
- 05000416/LER-1983-007, Forwards LER 83-007/03L-0 (← links)
- 05000416/LER-1982-183, Forwards LER 82-183/99X-0 (← links)
- 05000416/LER-1983-015, Forwards LER 83-015/03L-0 (← links)
- 05000416/LER-1983-008, Forwards LER 83-008/99X-0 (← links)
- 05000416/LER-1983-017, Forwards LER 83-017/03L-0 (← links)
- 05000416/LER-1983-003, Forwards LER 83-003/01T-0 (← links)
- 05000416/LER-1982-174, Forwards LER 82-174/03L-0 (← links)
- 05000416/LER-1982-176, Forwards LER 82-176/99X-0 (← links)
- 05000416/LER-1983-001, Forwards LER 83-001/01T-0 (← links)
- 05000416/LER-1982-144, Forwards LER 82-144/03L-0 (← links)
- 05000416/LER-1982-143, Forwards LER 82-143/03L-0 (← links)
- 05000416/LER-1982-146, Forwards LER 82-146/03L-0 (← links)
- 05000416/LER-1982-129, Forwards LER 82-129/03L-0 (← links)
- 05000416/LER-1982-125, Forwards LER 82-125/03L-0 (← links)
- 05000416/LER-1982-122, Forwards LER 82-122/99X-0 (← links)
- 05000416/LER-1982-130, Forwards LER 82-130/03L-0 (← links)
- 05000416/LER-1982-126, Forwards LER 82-126/99L-0 (← links)
- 05000416/LER-1982-110, Forwards LER 82-110/03L-0 (← links)
- 05000416/LER-1982-112, Forwards LER 82-112/03L-0 (← links)
- 05000416/LER-1982-118, Forwards LER 82-118/03L-0 (← links)
- 05000416/LER-1982-128, Forwards LER 82-128/03L-0 (← links)
- 05000416/LER-1982-119, Forwards LER 82-119/03L-0 (← links)
- 05000416/LER-1983-056, Forwards LER 83-056/03L-0 (← links)
- 05000416/LER-1982-077, Forwards LER 82-077/01T-0 (← links)
- 05000416/LER-1983-057, Forwards LER 83-057/03L-0 (← links)
- 05000416/LER-1983-055, Forwards LER 83-055/03L-0 (← links)
- 05000416/LER-1983-047, Forwards LER 83-047/03L-0 (← links)
- 05000416/LER-1983-053, Forwards LER 83-053/99X-0 (← links)
- 05000416/LER-1983-050, Forwards LER 83-050/03L-0 (← links)
- 05000416/LER-1983-054, Forwards LER 83-054/03L-0 (← links)
- 05000416/LER-1982-149, Forwards LER 82-149/03L-0 (← links)
- 05000416/LER-1982-147, Forwards LER 82-147/99X-0 (← links)
- 05000416/LER-1982-114, Forwards LER 82-114/03L-0 (← links)
- 05000416/LER-1982-108, Forwards LER 82-108/99L-0 (← links)
- 05000416/LER-1982-116, Forwards LER 82-116/03L-0 (← links)
- 05000416/LER-1982-113, Forwards LER 82-113/03L-0 (← links)
- 05000416/LER-1982-124, Forwards LER 82-124/03L-0 (← links)
- 05000416/LER-1982-101, Forwards LER 82-101/03L-0 (← links)
- 05000416/LER-1982-121, Forwards LER 82-121/03L-0 (← links)
- 05000416/LER-1982-117, Forwards LER 82-117/03L-0 (← links)
- 05000416/LER-1982-111, Forwards LER 82-111/99X-0 (← links)
- 05000416/LER-1982-094, Forwards LER 82-094/03L-0 (← links)
- 05000416/LER-1982-104, Forwards LER 82-104/03L-0 (← links)
- 05000416/LER-1982-087, Forwards LER 82-087/03L-0 (← links)
- 05000416/LER-1982-102, Forwards LER 82-102/99X-0 (← links)
- 05000416/LER-1982-092, Forwards LER 82-092/03L-0 (← links)
- 05000416/LER-1982-091, Forwards LER 82-091/03L-0 (← links)
- 05000416/LER-1982-099, Forwards LER 82-099/03L-0 (← links)
- 05000416/LER-1982-100, Forwards LER 82-100/03L-0 (← links)
- 05000416/LER-1983-189, Updated LER 83-189/03X-1:on 831207 & 840201,breaker 152-1704 to Div 3 ESF Bus Tripped.Caused by Broken Current Limiter Resistor Socket for Breaker Position Indicating Light. Agastat Relay 7012 Replaced (← links)
- 05000416/LER-1984-018, Corrected LER 84-018-00:on 840414,shutdown Cooling Sys Isolation Occurred When Technician Lifted Wrong Lead During Performance of Monthly Surveillance.Technician Reprimanded, Lead Terminated & Shutdown Cooling Restored (← links)
- 05000416/LER-1983-037, Forwards LER 83-037/03L-0 (← links)
- 05000416/LER-1983-030, Forwards LER 83-030/99X-0 (← links)
- 05000416/LER-1982-185, Forwards LER 82-185/03L-0 (← links)
- 05000416/LER-1982-184, Forwards LER 82-184/03L-0 (← links)
- 05000416/LER-1982-186, Forwards LER 82-186/99X-0 (← links)
- 05000416/LER-1982-182, Forwards LER 82-182/03L-0 (← links)
- 05000416/LER-1983-009, Forwards LER 83-009/03L-0 (← links)
- 05000416/LER-1983-002, Forwards LER 83-002/01T-0 (← links)
- 05000416/LER-1982-179, Forwards LER 82-179/03L-0 (← links)
- 05000416/LER-1982-177, Forwards LER 82-177/03L-0 (← links)
- 05000416/LER-1982-181, Forwards LER 82-181/03L-0 (← links)
- 05000416/LER-1982-180, Final LER 82-180/03L-0:on 821227,isolation Valve for Hose Station in Control Room Replaced Due to Leaking Which Pressurized Hose.Addl Hose Run to Supply Backup Fire Protection.Leaking Valve Replaced.Sys Returned to Svc (← links)
- 05000416/LER-1983-004, Forwards LER 83-004/01T-0 (← links)
- 05000416/LER-1983-128, Updated LER 83-128/01X-1:on 830912 During Routine Maint,Two fire-rated Penetrations Found Unsealed.Caused by Procedural Inadequacy.Penetrations Resealed (← links)
- 05000416/LER-1983-115, Updated LER 83-115/03X-1:on 830803 & 04,RHR Pump a Failed to Start.Div I Busses Incorrectly Shown Tripped,Annunciator Panels Came On,Optical Isolator Failed & Breakers Tripped. Caused by Incorrectly Terminated Cable (← links)
- 05000416/LER-1982-172, Update 2 to LER 82-172/99X-2:on 821210,penetration AE154C in Auxiliary Bldg Opened.Caused by Planned Maint Activity. Hourly Fire Watch Established.Penetration to Be Resealed by 830910 (← links)
- 05000416/LER-1983-042, Forwards LER 83-042/99X-0 (← links)
- 05000416/LER-1983-041, Forwards LER 83-041/03L-0 (← links)
- 05000416/LER-1983-044, Forwards LER 83-044/99X-0 (← links)
- 05000416/LER-1983-032, Forwards LER 83-032/03L-0 (← links)
- 05000416/LER-1983-034, Forwards LER 83-034/03L-0 (← links)
- 05000416/LER-1983-040, Forwards LER 83-040/03L-0 (← links)
- 05000416/LER-1983-039, Forwards LER 83-039/99X-0 (← links)
- 05000416/LER-1982-159, Forwards LER 82-159/03L-0 (← links)
- 05000416/LER-1982-155, Forwards LER 82-155/03L-0 (← links)
- 05000416/LER-1982-158, Forwards LER 82-158/99L-0 (← links)
- 05000416/LER-1982-157, Forwards LER 82-157/03L-0 (← links)
- 05000416/LER-1982-135, Forwards LER 82-135/99X-0 (← links)
- 05000416/LER-1982-141, Forwards LER 82-141/99X-0 (← links)
- 05000416/LER-1982-133, Forwards LER 82-133/03L-0 (← links)
- 05000416/LER-1982-142, Forwards LER 82-142/99X-0 (← links)
- 05000416/LER-1982-134, Forwards LER 82-134/03L-0 (← links)
- 05000416/LER-1982-137, Forwards LER 82-137/03L-0 (← links)
- 05000416/LER-1982-139, Forwards LER 82-139/03L-0 (← links)
- 05000416/LER-1982-138, Interim LER 82-138/99X-0:on 821112,during Shutdown,Several Duct Covers Could Not Be Installed Due to Cables Extending Through Ducts.Caused by Faulty Design Document.Engineering Evaluation Underway (← links)
- 05000416/LER-1982-140, Forwards LER 82-140/99X-0 (← links)
- 05000416/LER-1982-120, Forwards LER 82-120/99X-0 (← links)
- 05000416/LER-1982-063, Forwards LER 82-063/99X-1 (← links)
- 05000416/LER-1983-021, Updated LER 83-021/01T-1:on 830519,determined That Standby Gas Treatment Sys Flow Monitoring Instrumentation Reading in Error.Caused by Incorrect Calibr Range Based on Postulated Instead of Std Conditions.Instruments Recalibr (← links)
- 05000416/LER-1983-051, Forwards LER 83-051/03L-0 (← links)
- 05000416/LER-1996-002, Forwards LER 96-002-00 Re Routine Maint Rendering HPCS EDG Inoperable (← links)
- 05000416/LER-1983-058, Forwards LER 83-058/01T-0 (← links)
- 05000416/LER-1983-063, Forwards LER 83-063/01T-0 (← links)
- 05000416/LER-1982-156, Forwards Updated LER 82-156/03X-1 (← links)
- 05000416/LER-1983-067, Forwards LER 83-067/01T-0 (← links)
- 05000416/LER-1983-059, Forwards LER 83-059/03L-0 (← links)
- 05000416/LER-1983-043, Forwards LER 83-043/03L-0 (← links)
- 05000416/LER-1982-065, Forwards LER 82-065/03L-0 (← links)
- 05000416/LER-1982-066, Forwards LER 82-066/03L-0 (← links)
- 05000416/LER-1982-069, Forwards LER 82-069/03L-0 (← links)
- 05000416/LER-1982-070, Forwards LER 82-070/03L-0 (← links)
- 05000416/LER-1982-053, Forwards LER 82-053/03L-0 (← links)
- 05000416/LER-1982-005, Forwards LER 82-005/01T-0 (← links)
- 05000416/LER-1982-006, Forwards LER 82-006/01T-0 (← links)
- 05000416/LER-1983-045, Forwards LER 83-045/99X-0 (← links)
- 05000416/LER-1982-145, Forwards Updated LER 82-145/03X-1 (← links)
- 05000416/LER-1982-059, Forwards Updated LER 82-059/01X-1 (← links)
- 05000416/LER-1982-153, Forwards Updated LER 82-153/99X-1 (← links)
- 05000416/LER-1982-166, Forwards Updated LER 82-166/99X-1 (← links)
- 05000416/LER-1982-103, Forwards Updated LER 82-103/01X-1 (← links)
- 05000416/LER-1998-004, Forwards Corrected Copy of LER 98-004-00 to Include Page 1 of 4.LER Discusses Containment Penetration Being Opened Contrary to Ts,Per Requirements of 10CFR50.73 (← links)
- 05000416/LER-1987-006, Corrected LER 87-006-00:on 870501,isolation Valve in Steam Supply Piping to RCIC Sys Turbine Inadvertently Isolated. Caused by Personnel Error.Personnel Counseled (← links)
- 05000416/LER-2024-003, Feedwater Inlet Check Valve Incorrectly Determined Operable (← links)
- 05000416/LER-2024-002, Automatic Actuation of Reactor Protection System (← links)
- 05000416/LER-2024-001, High Pressure Core Spray Inoperable Due to Minimum Flow Valve Failure to Close (← links)
- 05000416/LER-2023-002, Reactor Scram Due to Generator Stator Fault to Ground (← links)
- 05000416/LER-2023-001-01, Valve Closure Test Failure Resulting in Condition Prohibited by Technical Specification (← links)
- 05000416/LER-2023-001, Valve Closure Test Failure Resulting in Condition Prohibited by Technical Specification (← links)
- 05000416/LER-2022-003, Manual Reactor Scram Due to Trip of the a Reactor Feedwater Pump (← links)
- 05000416/LER-2022-002, Loss of Secondary Containment During Standby Gas Treatment System Testing Due to Boundary Leakage (← links)
- 05000416/LER-2021-001-01, Primary Containment Outer Airlock Door Inoperable Due to Unacceptable Leak Rate (← links)
- 05000416/LER-2022-001, For Grand Gulf Nuclear Station, Unit 1, Manual Reactor Trip Due to the Loss of Balance of Plant Transformer 23 (← links)
- 05000416/LER-2021-005, Oscillation Power Range Monitors (Oprms) Technical Specification Noncompliance (← links)
- 05000416/LER-2021-004, Procedure Inadequacy Resulted in Core Monitoring System Miscalibration and Violation of Technical Specification (← links)
- 05000416/LER-2021-003, High Pressure Core Spray Declared Inoperable (← links)
- 05000416/LER-2020-006-02, Primary Water Tank Low Level Causing Turbine Trip and Subsequent Reactor Scram (← links)
- 05000416/LER-2020-005-02, Primarv Water Svstem Flow Lowered Causinc Turbine Trio and Subseauent Reactor Scram (← links)
- 05000416/LER-2020-004-01, Automatic Reactor Scram Due to Reactor Feed Pump Trip (← links)
- 05000416/LER-2020-003-01, Manual Reactor Scram Due to Turbine High Pressure Control Valve Malfunction and Automatic Reactor Water Level Scram (← links)
- 05000416/LER-2020-002-02, Reactor Scram Due to Main Turbine Trip (← links)
- 05000416/LER-2021-002, Core Monitoring System Software Modeling Error Resulted in Conditions Prohibited by Technical Specifications (← links)
- 05000416/LER-2021-001, Primary Containment Outer Airlock Door Inoperable Due to Unacceptable Leak Rate (← links)
- 05000416/LER-2020-006-01, Re Primary Water Tank Low Level Causing Turbine Trip and Subsequent Reactor Scram (← links)
- 05000416/LER-2020-005-01, Primary Water System Flow Lowered Causing Turbine Trip and Subsequent Reactor Scram (← links)
- 05000416/LER-2019-006-01, Failure to Meet Technical Specification 5.5.7 for B Train Standby Gas Charcoal Filter Media Efficiency (← links)
- 05000416/LER-2020-006, Re Primary Water Tank Low Level Causing Turbine Trip and Subsequent Reactor Scram (← links)
- 05000416/LER-2020-005, Re Primary Water System Flow Lowered Causing Turbine Trip and Subsequent Reactor Scram (← links)
- 05000416/LER-2020-004, Automatic Reactor Scram Due to Reactor Feed Pump Trip (← links)
- 05000416/LER-2020-003, Manual Reactor Scram Due to Turbine High Pressure Control Valve Malfunction and Automatic Reactor Water Level Scram (← links)
- 05000416/LER-1998-002-01, :on 980421,failure to Maintain Standby DG Seismically Qualified as Required by TS Was Noted.Caused by Failure to Comply W/Sys Operating Instruction 04-1-01-P75-1. Door Was Closed Immediately (← links)
- 05000416/LER-1989-008, :on 890523,two Redundant Secondary Containment Isolation Valves Failed to Close within 4 Limit.Caused by Failure of Internal Disks of Exhaust Valves.Exhaust Valve of Actuator of Each Damper Replaced (← links)
- 05000416/LER-1989-006, :on 890505,reactor Tripped on Low Reactor Water Level.Caused by Vessel Overfeed Due to Feedwater Heater Outlet Valves Not Fully Closed But Indicated as Closed. Design Changes to Feedwater Logic Evaluated (← links)
- 05000416/LER-1989-012, :on 890814,main Condenser Expansion Joint Failed Causing Condenser Vacuum to Decrease & Reactor Scram. Caused by Rupture of Section of Condenser Expansion Belt. RCIC Sys Manually Initiated (← links)
- 05000416/LER-1989-005, :on 890429 & 0508,RCIC Sys Isolated on Indicated High Steam Line Flow.Caused by Steam Line Pressure Transients,Resulting in Oscillations in Sensing Line. Procedure Re Instrument Calibrs Revised (← links)
- 05000416/LER-1989-013, :on 890814,MSIV B21F022B Failed to Close Upon Demand from Automatic & Remote Manual Actuation Signals. Caused by Elastomer Seat Matl Extruding Into Exhaust Port Vent Hole.Dual Valves Replaced.Part 21 Related (← links)
- 05000416/LER-1989-004, :on 890420 & 26,RHR Pump a Tripped While Operating in Shutdown Cooling Mode.First Event Caused by Replacement of Power Fuse in RCIC Trip Circuit.Second Event Caused by Arcing in RCIC Circuit (← links)
- 05000416/LER-1988-014, :on 880911,RWCU Sys Isolation Occurred as Operators Shifted from post-pump to Prepump Mode.Caused by Air Trapped in Flow Transmitter.Integrated Operating Procedures Revised (← links)
- 05000416/LER-1989-009, :on 890620,RCIC & RWCU Sys Isolated on High Steam Line Flow Signal & High Differential Temp,Respectively During Scheduled Maint.Caused by Personnel Error.Responsible Shift Superintendent Instructed (← links)
- 05000416/LER-1989-002, :on 890331,leakage Rates of Five Containment Isolation Valves Could Not Be Quantified,Violating Tech Specs.Caused by Excessive Leakage Beyond Equipment Capability.Valve Actuator Replaced (← links)
- 05000416/LER-1989-003, :on 890414,insp of Fire Walls & Penetrations Identified Nonconformance in 3 H fire-rated Wall in Control Bldg Separating HVAC Chase from Lower Cable Spreading Room. Caused by Notch in Block Wall.Wall Sealed (← links)
- 05000416/LER-1989-010, :on 890722,reactor Automatically Scrammed Due to High Neutron Flux Signal on APRMs & RCIC Automatically Actuated.Caused by Severe Electrical Storm Passing Over Station.Channel Check of APRM Indications Done (← links)
- 05000416/LER-1989-011, :on 890726,discovered That Fuel & Cartridge Holder for Fuel Handling Area Ventilation Installed W/O Cartridge.Caused by Personnel Error.Procedure Revised to Require Insp That Cartridge Installed (← links)
- 05000416/LER-1988-012, :on 880518,unit Tripped on APRM Neutron Flux High Signal.Caused by Spike to Grounding Strap for Plant Security Fence Located on Roof of Turbine & Control Bldgs. Grounding Strap Relocated (← links)
- 05000416/LER-1988-004, :on 880112,RWCU Sys Isolation Occured While Operators Prepared to Secure One of Two Operating RWCU Pumps.Caused by RWCU Sys Susceptibility to Perturbations at Reactor Pressures Less than 100 Psig.Procedure Changed (← links)
- 05000416/LER-1988-004-02, Forwards LER 88-004-02.Util Has Decided Not to Install Keylock Bypass Switches That Bypass Delta Flow Isolation Signal at Present Time.Means to Reduce Potential of RWCU Isolations Continuing (← links)
- 05000416/LER-1987-009, :on 870629,reactor Scram Occurred.Caused by Agastat Relay N62-R33 Intermittently Failing Which Caused Main Steam Inlet Valve to Steam Jet Air Ejector B to Close. Caused by Break in Relay Wire Crimp (← links)
- 05000416/LER-1989-001, :on 890327,power Interruption to ESF Bus Caused Secondary Containment Isolation.Div 1 Bus Connected to ESF Transformer 12 to Provide Div 1 & 2 Buses W/Independent Power Sources (← links)
- 05000416/LER-1989-007, :on 890508,RWCU Sys Isolated on Leak Detection Differential Flow Signal While Shifting Rcwu Operation from pre-pump to post-pump Mode.Caused by Flow Perturbations. Instructions Changed to Modify Flow Lineup (← links)
- 05000416/LER-1987-013, :on 870807,HVAC Ductwork Design Determined Inadequate to Withstand Potential Pressure Differentials Due to Tornado.Caused by Designer Not Thoroughly Applying Design Document M-43.Ductwork Stiffeners Installed (← links)
- 05000416/LER-1987-012, :on 870806,reactor Scrammed on Turbine Control Fast Closure Signal.Caused by Short in Interlock Switch Which Caused Backup Protection Scheme Relay to Actuate Signal.Relay Will Be Inspected for Problems (← links)
- 05000416/LER-1987-011, :on 870729,discovered That Two motor-operated Containment Isolation Valves Used in Series at Containment Penetration 87 Shared Same Divisional Power Source.Caused by Incomplete Follow Through on Design Change (← links)
- 05000416/LER-1986-029, :on 860826,discovered Incorrect Flow Measuring Device Coefficient Used in Establishing Coolant Flow to ESF Electrical Switchgear Room Coolers Resulting in Low Flows. Caused by Ae Design Error.Pipes Flushed (← links)
- 05000416/LER-1987-020, :on 871119,isolation of Containment Isolation Valve E12-F009 & Trip of Operating RHR Shutdown Cooling Pump Occurred.Caused by Blown RHR Sys Isolation Logic Fuse. Fuse Replaced (← links)
- 05000416/LER-1987-019, :on 871117,reactor Vessel Head Stud Tensioner W/Excessive Weight Moved Over Fuel in Upper Containment Pool Fuel Storage Tanks.Caused by Inadequate Controls by GE & Util.Procedure to Be Written (← links)
- 05000416/LER-1987-018, :on 871114,discovered That Surveillance Program Tracking Sys Rept Did Not Include Adequate Info on Surveillance of Operational Condition During Core Alteration.Caused by Deficient Procedure (← links)
- 05000416/LER-1998-004-02, :on 980625,noted That Containment Isolation Valve Had Been Opened Simultaneously During Check Valve Repairs Contrary to Ts.Caused by Inadequate Work Practices. Will Revise Protective Tagging Sys Procedure 01-S-06-1 (← links)
- 05000416/LER-1987-017, :on 871005,failure to Complete Drywell Integrity Insp in Nov 1985 Discovered.Caused by Inadequate Verification by Preparer & Reviewer of Procedure 06-ME-1M10-0-0002.Improved Guidance Planned (← links)
- 05000416/LER-1987-005, :on 870414,main Steam Line Radiation Monitor K610B Found W/Trip Setpoint Exceeding Tech Spec 3.3.2-2.2.b. on 870415,monitors K610C & D Found W/Setpoints That Also Exceeded Limit.Instruments to Be Calibr (← links)
- 05000416/LER-1987-010, :on 870630,unintentional Closure of Isolation Valves Occurred.Caused by Manual Opening of Power Supply Breaker.Procedure Revised to Require Detailed Investigation of Effect on Related Equipments (← links)
- 05000416/LER-1987-016, :on 871001,operations Personnel Discovered That Area Radiation Survey Had Exceeded Tech Spec Limiting Condition for Operation Required 24 H Frequency.Caused by Shift Supervisor Error.Supervisor Counseled (← links)
- 05000416/LER-1985-008, :on 850213,instrument Air Compressor Tripped Due to Low Cooling Water Pressure While Air Vented from Turbine Bldg Cooling Water Sys.Caused by Loss of Feedwater. Main Turbine Manually Tripped & MSIVs Closed (← links)
- 05000416/LER-1987-015, :on 870917,RWCU Sys Isolation Occurred.Caused by High Differential Flow Signal Received During Startup in Prepump Mode of Operation.Sys Operating Instruction Will Be Changed to Require Use of Bypass Switch (← links)
- 05000416/LER-1987-021, :on 871130,shutdown Cooling Suction Valve E12-F009 Isolated.Caused by Personnel Error.Future Power Outages & Restorations Will Have Procedures to Ensure That Actions Properly Completed (← links)
- 05000416/LER-1999-004-03, :on 990909,HPCS Sys Was Declared Inoperable Due to Generator Shaft Bearing Failure.Caused by Inadequate Lubrication.Deficiency Document Was Issued & DG Was Tagged Out.With (← links)
- 05000416/LER-1990-019-01, :on 901014,during Refueling Outage Four,Three Events Occurred in Which Same Power Supply Breaker Inadvertently Opened (← links)
- 05000416/LER-1986-032, :on 860916,17 & 1015,inadvertent Secondary Containment Isolations & ESF Sys Actuations Experienced Due to Outage Work Activities.Special Review Team Established to Examine Electrical tag-outs (← links)
- 05000416/LER-1986-033, :on 860923,primary Containment Cooling Sys Isolated Due to High Radiation Trip Signal from Containment Drywell Ventilation Exhaust Radiation Monitors.Containment Ventilation Sys Will Remain Isolated (← links)
- 05000416/LER-1986-031, :on 860901,prior to Changing from Startup to Run,Aprm Flow Channels Not Checked as Required by Startup Integrated Operating Instruction.Caused by Technician Error in Interpreting Procedure.Procedure Revised (← links)
- 05000416/LER-1987-008, :on 870511,LPCI/RHR a Subsystem Quarterly Surveillance for RHR Pump a Performed at Differential Pressure Not Meeting Tech Spec Acceptance Criteria.Caused by Personnel Error.Surveillance Reperformed (← links)
- 05000416/LER-1986-043, :on 861106,during Replacement of Agastat Relays,Div 1 Drywell Purge Compressor Inadvertently Started. Caused by Error in Impact Statement of Work Authorization. Control of Work Procedure Revised (← links)
- 05000416/LER-1986-042, :on 861105,failure to Revise Daily Operating Log to Incorporate New Channel Check Required by 861013 Amend to Tech Specs Discovered.Caused by Personnel Error. Plant Licensing Activities Procedure Revised (← links)
- 05000416/LER-1987-007, :on 870501,inservice Testing of Two Check Valves in Standby Liquid Control Sys Inadequate.Caused by Inadequate Procedure.Valves Inspected for Other Concerns. Pump & Valve Testing Program Modified (← links)
- 05000416/LER-1986-028, :on 860825,reactor Automatically Scrammed in Response to Inadvertent Fast Closure of Turbine Control Valves.Caused by Actuation of Main Generator Load Reject Circuitry Due to Personnel Error (← links)
- 05000416/LER-1986-041, :on 861030,Divs 1 & 2 Auxiliary Bldg Isolation Valve Bypass Switches Found in Bypass Position Following Establishment of Secondary Containment Integrity.Caused by Inadequate Procedure.Procedure to Be Revised (← links)
- 05000416/LER-1986-040, :on 861027,determined That Two Weekly Surveillances of Breaker Alignment Not Performed in Required Tech Spec Time Interval.Caused by Nonlicensed Operator Oversight.Procedures Now Hand Carried (← links)
- 05000416/LER-1986-039, :on 861027,discovered That Reactor Coolant Conductivity Samples Taken on 861024,25 & 26 Invalid.Caused by Isolation of RWCU on 861023 During Valve Manipulations. Sample Retaken & Conductivity Found Unchanged (← links)
- 05000416/LER-1986-036, :on 861016,Tech Spec Limiting Condition for Operation Not Met When on 861015,channel Ventilation Exhaust Monitors B & C Removed from Svc by Opening & tagging-out Supply Breakers to Support Mod Work (← links)
- 05000416/LER-1986-038, :on 861022,Div I Auxiliary Bldg Isolation Valves Inadvertently Isolated During Test.Caused by Interruption of Circuit During Removal of Jumper. Surveillance Procedures Will Be Revised (← links)
- 05000416/LER-1986-035, :on 861021,effluent Releases Continued for More than Tech Spec Limit of 30 Days.Caused by Failure to Adequately Track Expiration of Limiting Condition for Operation.Rept Form Revised (← links)
- 05000416/LER-1986-037, :on 861022,Tech Spec Limiting Conditions for Operation Requirements Not Met When Monthly Functional Surveillance of Containment/Drywell Ventilation Exhaust Radiation Monitors Exceeded Max Frequency (← links)
- 05000416/LER-1986-034, :on 861014,isolation Valve on Common Suction Pipe for RHR Shutdown Cooling Loops a & B Isolated as Result of Contact Between Conduit & Rectifier Fin.Caused by Unprotected Fins.Edgeguards Installed on Fins (← links)
- 05000416/LER-1986-024, :on 860711,operations Personnel Discovered That Monthly Functional Test of Drywell Personnel Air Lock Outer Door Inflatable Seal Pressure Instrumentation Not Performed by 860706 (← links)
- 05000416/LER-1997-004-03, :on 970911,failure to Declare Valve Inoperable During Work Having ISI Required Stroke Time Retest Occurred. Caused by Failure to Follow Work Control Process.Appropriate Personnel in Depts Involved Being Trained (← links)
- 05000416/LER-1986-023, :on 860619,discovered Potentially Generic Deficiency Re Inoperability of HPCS Diesel Generator During Automatic Unexcited Idle Run.Caused by Circuit Design Problem.Sys Operating Instruction Revised (← links)
- 05000416/LER-1997-003-01, Forwards LER 97-003-01 Re CR Envelope Leakage Potentially Exceeding License Condition 2.C(38) Limit (← links)
- 05000416/LER-1986-015, :on 860303,matl Nonconformance Rept Issued for Four Nonseismically Qualified Agastat Model 7014 Relays in Control Room Emergency Filtration Sys.Condition Existed Since 820816.Qualified Relays Installed (← links)
- 05000416/LER-1987-001, :on 870108,chemistry Section Personnel Determined Hydrogen Samples Taken from Condenser Offgas Pretreatment Sample Station Not Representative of Main Condenser Offgas Due to Failed Solenoid Valve (← links)
- 05000416/LER-1986-011, :on 860407,safety Relief Valve Inadvertently Lifted & Could Not Be Verified to Close within 2-minute Limiting Condition for Operation Time Limit.Unit Shut Down. on 860408,automatic Reactor Scram Actuated (← links)
- 05000416/LER-1986-030, :on 860826 & 0902,certain Control Room Boundary Penetrations Breached in Excess of License Condition.Caused by Personnel Error.Tracking Method & Procedures Revised. Responsible Engineer Reinstructed (← links)
- 05000416/LER-1986-008, :on 860224,discovered That Surveillance Procedures Did Not Adequately Test for Complete Response Time of end-of-cycle Recirculation Pump Trip Sys.Caused by Unclear Tech Spec Note.Tech Spec to Be Changed (← links)
- 05000416/LER-1986-027, :During NRC 860611-15 Insp,Hourly Fire Watches Found to Exceed Tech Spec 1 H Frequency.Caused by Administrative Deficiencies.Fire Watch Personnel Received Verbal & Written Instructions (← links)
- 05000416/LER-1988-015, :on 880915,discovered Water Draining from Div 2 Diesel Engine Left Bank Intake Manifold Drain Line.Caused by Ruptured Tubes in Intercooler Inlet Adapter.Div 2 Diesel Generator Left Bank Intercooler Replaced (← links)
- 05000416/LER-1986-044, :on 861118,permanent Electrical Wire Erroneously Removed from Isolation Logic Circuit During Performance of Surveillance.Caused by Procedural Error. Procedure Revised to Delete Incorrect Step (← links)
- 05000416/LER-1986-022, :on 860619,discovered That Instrument Channel Which Provides Automatic Depressurization Sys Actuation Permissive Signal Not Tested During Mar 1986.Caused by Personnel Error.Package Checks Improved (← links)
- 05000416/LER-1986-029-04, Forwards Corrected LER 86-029-04,reflecting Omitted Rept Date from Page 1 & Incorporating Final Safety Assessments Re Reevaluations of Impact of Increased post-accident Auxiliary Bldg Corridor Temps on Reportability Determin (← links)
- 05000416/LER-1999-002, :on 990207,ESF Actuation Occurred.Caused by Inattention to Detail.Standdown Held for All Shift I&C Personnel.With (← links)
- 05000416/LER-1986-025, :on 860725,breaker Inadvertently Bumped Open While Performing Mod Work Activities Resulting in Loss of Power in Certain Div 1 Isolation Valves.Caused by Personnel Error.Procedures Revised (← links)
- 05000416/LER-1986-019, :on 860522,PVC Drain Pipes from Computer Room Air Conditioners Improperly Routed Through Penetrations. Initially Identified During 841215 Insp.Caused by Personnel Error.Fire Watch Instituted.Design Changed (← links)
- 05000416/LER-1988-019, :on 881010,HPCS Sys Inadvertently Injected, Resulting in Reactor Scram on Low Water Level.Caused by Actuation of Channels C & G of Reactor Low Water Level HPCS Initiation Logic Due to Radio Transmission (← links)
- 05000416/LER-1988-018, :on 881007,bolted Blind Flange Not Verified Intact as Required by Tech Specs.Caused by Procedural Deficiency.Penetration Immediately Verified Intact & Procedure Revised to Include Verification (← links)
- 05000416/LER-1986-014, :on 860411,failure to Perform Nonroutine Surveillance Retest for motor-operated Isolation Valve Thermal Overload Bypass Circuitry Identified.Caused by Procedural Error.Procedure Will Be Revised (← links)
- 05000416/LER-1987-004, :on 870227,operations Personnel Discovered Delinquent Condensate & Refueling Water Storage & Transfer Sys Valve Operability Surveillance.Caused by Personnel Error.Surveillance Completed on 870227 (← links)
- 05000416/LER-1987-003, :on 870225,both Trains of Standby Gas Treatment Sys Inoperable for 3 H.Caused by Personnel Error.Memorandum Issued to All Plant Personnel Reiterating Need for Attention to Details (← links)
- 05000416/LER-1988-016, :on 880923,determined That Situations During Cold Shutdown & Refueling Where Certain Loads Normally Handled Over Irradiated Fuel W/O Secondary Containment Integrity Not Bounded by Events Existed (← links)
- 05000416/LER-1985-031, :on 850816,cell in Div 1 Battery Bank Found to Be Inoperable Based on 850813 Specific Gravity Measurements. Caused by Personnel Error.Surveillance Procedure Being Revised to Clarify When Battery Inoperable (← links)
- 05000416/LER-1999-003-01, :on 990221,reactor Scram Manually Inserted. Caused by Decreasing Condenser Vacuum.New Turbine Expansion Joint Boot Seal Installed on a & C Condensers.With (← links)
- 05000416/LER-1998-001, :on 980128,manual Reactor Scram Occurred Due to MSR Differential Temp.Caused by Manual Operator Actions. Replaced Blown Fuses,Master & Slave Static Switch Controllers & Synchronization Board (← links)
- 05000416/LER-1986-021, :on 860607,unplanned RCIC Sys Isolation Occurred Due to False High Steam Flow Trip Signal.Caused by Faulty Calibr Unit Power Supply.Unit Replaced.Isolation Valve Reopened & Trip Channel Restored to Svc (← links)
- 05000416/LER-2020-002, Reactor Scram Due to Turbine Trip (← links)
- 05000416/LER-1986-020, :on 860603,discovered That Nonqualified Relay Could Cause Loss of Standby Gas Treatment Sys Safety Function During Accidents.Caused by Approved Design.Circuit Design Will Be Modified to Bypass Fan Contact (← links)
- 05000416/LER-1986-018, :on 860513,grab Samples Not Collected During Limiting Condition for Operation Due to Inoperability of Hydrogen Monitors.Caused by Failure of Supervisor to Verify Termination of Condition (← links)
- 05000416/LER-1997-005-03, :on 970930,inadequate Retest of Containment Airlock Air Seal Sys Occurred.Caused by Inadequate Use of Administrative Controls.Performed Maint Leak Test of N010A Air Tube Fitting & Revised Surveillances (← links)
- 05000416/LER-1997-006-02, :on 971121,release of Contaminated Liquid Outside of Controlled Access Area Was Noted.Caused by Lack of Administrative Control of Hydrolazing Inside Controlled Access Area.Secured & Cleaned Spill Area (← links)
- 05000416/LER-1986-017, :on 860430,wrong Fuse Pulled During Attempt to Deactivate Containment Isolation Valve Causing Actuation of Combustible Gas Control Subsystem A.Fuse Reinserted & Sys Returned to Standby.Operator Disciplined (← links)
- 05000416/LER-1990-020-01, :on 901016,containment Cooling Sys Found on High Radiation Level (← links)
- 05000416/LER-1984-029, :on 840422,when Plant Changed Operating Modes to Startup,Proper Surveillance to Prove Operability of Drywell Purge Compressor B Not Completed.Caused by Personnel Error (← links)
- 05000416/LER-1986-012, :on 860410,while in Cold Shutdown,Containment Isolation Valve El2-F008 Closed.Caused by Failed Coil in Logic Relay.Relay Replaced (← links)
- 05000416/LER-1986-010, :on 860403,field Engineer Inadvertently Bumped Power Switch to Distribution Panel 1484 to Off Position, Causing Primary & Secondary Containment Isolations.Engineer Counseled (← links)
- 05000416/LER-1987-024, :on 871212,reactor Protection Sys Actuation Occurred.Caused by Header Air Pressure Diminished Faster than Anticipated.No Procedure Revs Required (← links)
- 05000416/LER-1998-006-02, :on 981014,deck Grating Potentially Affected HPCS Suction Strainer.Caused by Lack of Positive Administrative Process to Control CR Related Temporary Solutions.Will Change Noted Process.With (← links)
- 05000416/LER-1998-005-02, :on 981009,delinquent LCO Action Occurred. Caused by Inadequate Work Practices & Verbal Communications. Required Ac/Dc Lineup Surveillance Was Immediately Completed Upon Discovery of Missed TS Requirement.With (← links)
- 05000416/LER-1986-006, :on 850207,RCIC Turbine Steam Supply Inboard Isolation Valve Isolated on False RHR Equipment Area High Ambient Temp Signal.Caused by Faulty Thermocouple Shield Wiring.Wiring Repaired (← links)
- 05000416/LER-1988-017, :on 880928,RWCU Isolation Occurred While Performing Surveillance on RWCU Isolation Logic.Caused by Lack of Attention to Detail by Licensed Reactor Operator & Instrumentation & Control Technician (← links)
- 05000416/LER-1998-003-04, :on 980507,core Shroud Insp Tool Theta Drive Ring Became Partially Disconnected from Strongback.Caused by Air Bubbles Vented Into Vessel.Secured Ring Temporarily While Recovery Plan Was Developed.With (← links)
- 05000416/LER-1998-004-01, Forwards LER 98-004-01,IAW 10CFR50.73.Rept Is Being Submitted as Final Rept.Section G Contains Figure 1,which Is Intended to Facilitate Understanding of LERs Narrative (← links)
- 05000416/LER-1986-016, :on 860417,error Discovered in Procedure That Caused Missed Isolation Time Measurement for Containment power-operated Isolation Valve on MSIV Leakage Control Sys. Caused by Requirement Inadvertently Deleted (← links)
- 05000416/LER-1988-013, :on 880905,secondary Containment Isolation Valve Failed to Close within Required Time Limit.Caused by Personnel Error.Disciplinary Action Initiated,Personnel Trained & Labels Installed on ESF Power Panels (← links)
- 05000416/LER-1988-008, :on 880208,MSIV Leakage Control Sys Dilution Air Inlet Found Sealed W/Tape.Cause of Event Uncertain.Tape Removed,Walkdown Insp of Inboard & Outboard MSIV Subsystems Conducted & Warning Sign Placed at Inlet (← links)
- 05000416/LER-1985-050, :on 851231,reactor Scrammed from Low Condenser Hotwell Level & HPCS Injection Valve Failing to Open.Caused by Failure of Agastat Relay Base.Reactor Water Level Restored.Relay Base Replaced (← links)
- 05000416/LER-1986-001, :on 860101,reactor Scrammed on Low Reactor Water Level.Caused by Operator Error & Stuck Recorder Pen on Water Level Recorder.Memo Issued & Recorder Reworked (← links)
- 05000416/LER-1988-011, :on 880317,inadvertent RHR Pump Start Occurred During Monthly Functional Test of RHR Pump B Start Time Delay.Caused by Electrician Error.Appropriate Personnel Will Be Retrained & Procedures Will Be Enhanced (← links)
- 05000416/LER-1988-010, :on 880315,reactor Scram on Low Water Level Occurred.Caused by Loose Connection in Reactor Protection Sys Terminal Box de-engergizing Scram Pilot a Solenoids of Control Rods.Connection Cleaned & Tightened (← links)
- 05000416/LER-1988-009, :on 880227,hydrogen Ignition Occurred in Offgas Sys Causing Ignition of Lower Portion of First Charcoal Absorber Beds.Caused by Wetting of Catalyst in Offgas Hydrogen Combiner.Instruction Revised (← links)
- 05000416/LER-1988-006, :on 880120,condenser Circulating Water Manway Cover Leaked & Sprayed Water on Hotwell Low Level Switches Causing False Low Hotwell Level Signal.Caused by Slipped Gasket.Gasket Replaced & Glued in Place (← links)
- 05000416/LER-1997-002-04, :on 970619,SRV Test Switch for Div II relief/low-low Set Logic Placed in Test Position.Caused by Div Switch Already in Test. Div II SRV Group Test Switch Immediately Returned to Normal (← links)
- 05000416/LER-1997-003-02, :on 970618,certain Control Room Envelope Leakage May Exceed License Condition 2.C(38) Discovered. Cause Indeterminate.Will Perform Root Cause Evaluation & Replaced Electrical Conduit Seals Identified as Missing (← links)
- 05000416/LER-1988-003, :on 880109,line Break Instrumentation for RHR a High Differential Pressure (Dp) Alarmed.Caused by Change in Normal Indication Dp Between LPCS & RHR a Injection Lines. Analysis Being performed.W880208 Ltr (← links)
- 05000416/LER-1988-002, :on 880110,reactor Scramed Due to Main Output Transformer Fault.Caused by Winding Fault on High Voltage Side of Transformer.Transformer Replaced & Electrical Tests & Oil Samples Performed (← links)
- 05000416/LER-1988-007, :on 880204,discovered That Radiation Monitor Sample Flow for Standby Svc Water Sys Out of Svc W/O Taking Action Required by Tech Spec.Caused by Personnel Error. Sample Pump Repaired & Round Sheet Changed (← links)
- 05000416/LER-1987-025, :on 871219,reactor Protection Sys Actuation Caused by Incorrect Installation of Fuse During MSIV Closure Calibr.Individuals Reprimanded for Failure to Correctly Install Fuse (← links)
- 05000416/LER-1986-004, :on 860212,reactor Scrammed During Shutdown for Excessive Reactor Coolant Leakage.Caused by Deterioration of Seal on Reactor Recirculation Pump B.Seal Replaced (← links)
- 05000416/LER-1992-009, :on 920509,determined That Fuel Assemblies Exhibited Greater than Expected Closure of Compression Springs.Cause Unknown & Investigation by Siemens Nuclear Power Corp Underway (← links)
- 05000416/LER-1985-047, :on 851216,Div 1 Control Room Emergency Filtration Subsys Switched to Isolation Mode of Operation Due to High Chlorine Concentration Signal.Cause Not Determined (← links)
- 05000416/LER-1986-009, :on 860319,supply Air Flow to Automatic Depressurization Sys Air Receivers Determined to Be Excessive.Caused by Sys Operating Pressure of 185 Psig Exceeding Design Valve Seat Leak Tightness (← links)
- 05000416/LER-1997-001, :on 970312,TS Surveillance of Standby Svc Water Subsystem Was Missed.Caused by Less than Adequate Work Practices.Performed Evaluation of Effect of Installation of non-qualified Annubar in Room Coolers (← links)
- 05000416/LER-1986-007, :on 860220,RHR Pump B & Standby Svc Water Pump B Automatically Started Due to Technician Connecting Test Switch to Wrong Terminal.Caused by Inadequate Verification by Contractor.Contract Terminated (← links)
- 05000416/LER-1997-001-02, :on 970312, a Subsystem Was Declared Inoperable.Caused by Inappropriate Action. a Subsystem Was Retested W/No Malfuntions Identified (← links)
- 05000416/LER-1986-005, :on 860215,heater for Filter Train B Found to Dissipate Approx 44.9 Kw,Violating Tech Spec Min Requirement of 45 Kw.Caused by Failure to Submit Tech Spec Change When Design Change Implemented.Tech Specs Revised (← links)
- 05000416/LER-1985-038, :on 850925,actuation of Standby Gas Treatment Sys a & Control Room Fresh Air Unit a Occurred Due to Reduced Voltage Output.Caused by Failed Transformer Internal.Failed Solenoid Replaced (← links)
- 05000416/LER-1985-044, :on 851118,control Room Emergency Filtration Subsystem Isolation Occurred Due to High Chlorine Concentration Signal.Cause Undetermined.Sys Returned to Svc on 851125 (← links)
- 05000416/LER-1985-037, :on 850620,smoke Detector in Control Bldg HVAC Chase Failed to Annunciate on Control Room Console During Routine Testing.Caused by Erroneous Zone Description Entry Onto Data Base.Controls Re Data Mod Underway (← links)
- 05000416/LER-1985-035, :on 850911,four motor-operated Valves & Two Drain Line Check Valves of MSIV Leakage Control Sys Not Tested Per Tech Specs 4.6.1.4.6 & 4.0.5.Caused by Delay in Issuing/Administering Procedure (← links)
- 05000416/LER-1985-042, :on 851102 & 23,ESF Bus Trips Occurred.Caused by Incorrect Wiring Configuration.Configurations Corrected (← links)
- 05000416/LER-1985-033, :on 850830,discovered Standby Svc Water Sys Not Under Plant Operational Control.Caused by Piping Not Being Included in Release Package.Programmatic Controls for Addressing Concerns Under Evaluation (← links)
- 05000416/LER-1985-041, :on 851031,operability of Alternate Method of DHR Not Demonstrated within 24 H Period Per Tech Spec 3.4.9.2.Caused by Inadequate Coordination of Time Changes for Required Action.Shift Checksheet Revised (← links)
- 05000416/LER-1985-010, :on 850223,ESF Actuation Occurred Due to Div 2 Inverter Trip on High Voltage.Caused by Relay Reenergizing Before Level Instruments Could Recover (← links)
- 05000416/LER-1985-049, :on 851222,review of 850914 Quarterly Surveillance Revealed That Valve Isolation Time Greater than Tech Spec Limit & Criteria Erroneously Marked Acceptable. Caused by Personnel Error (← links)
- 05000416/LER-1985-007, :on 850210,MSIVs Failed to Close Normally Subsequent to Reactor Scram.Caused by Failure of Dual Solenoid Valves to Transfer When Deenergized.All Valves Replaced.Part 21 Related (← links)
- 05000416/LER-1985-048, :on 851218,diesel Generator Automatically Started Due to Loss of Power to ESF Bus 17AC.Caused by Cut Down Tree Falling on Primary Transmission Line.Diesel Generator Automatically Started (← links)
- 05000416/LER-1985-045, :on 851205,some Namco Limit Switches Identified as Not Meeting Environ Qualification Requirements of 10CFR50.49.Four Valves Found W/Seven Nonqualified Limit Switches When Qualified Switches Required (← links)
- 05000416/LER-1985-040, :on 851021,while Performing Calibr Surveillance of Scram Hydraulic Control Unit Accumulator Low Pressure Alarm switches,158 of 193 Switch Setpoints Found Lower than Tech Spec Limits.Tech Specs Revised (← links)
- 05000416/LER-1985-039, :on 851017,inadvertent Loss of Power to ESF Bus Caused Inoperability of Div 2 Safety Sys.Caused by Personnel Error.Electrical Personnel Instructed on Relationship of Protective Circuit to Feeder Breakers (← links)
- 05000416/LER-1985-046, :on 851204,surveillance Procedure Deficiency Found Involving Logic Sys Functional Test of Three RHR Sys Isolation Valves.Caused by Oversight in Incorporating All Aspects of Procedure.Procedure Revised (← links)
- 05000416/LER-1996-004, :on 960606,manual Reactor Scram Occurred Due to Spurious Multiple SRV Lifts.Trip Unit 1C11N655B Was Shipped to Manufacturer for Failure Analysis (← links)
- 05000416/LER-1985-030, :on 850807,reactor Automatically Scrammed Due to Main Generator Trip.Caused by Faulty Instrument Plug connector.Off-normal Event Procedure Performed & Plug Connector Repaired (← links)
- 05000416/LER-1996-005-03, :on 961027,failure of Motor Pinion Keys in LPCI Valves Occurred.Caused by Suspect Material Used for Motor Pinion Keys as Previously Identified by Limitorque. Motor Pinion Key Replacement Was Reviewed (← links)
- 05000416/LER-1984-050-03, Corrected LER 84-050-03:on 841102,condition on 841015 Re Safe shutdown-related Cables Found W/Omitted Fire Rated Barriers Determined Outside Design Basis.Design Change Documents Initiated (← links)
- 05000416/LER-1985-029, :on 850724,penetrations CE359G & CE361G Functioning as Fire Barriers Discovered Open.Caused by Failure to Follow Procedures.Fire Watches Established & Maint Work Orders Issued to Seal Penetrations (← links)
- 05000416/LER-1984-050, :on 841102,safe Shutdown Related Cable Raceways W/Omitted Fire Rated Barriers Found Outside Plant Design Basis.Nonconformance Documents Written to Correct Deficiencies & Fire Watches Maintained (← links)
- 05000416/LER-1985-027, :on 850703,circulating Water Pump B Tripped, Causing Turbine Trip & Reactor Scram.Caused by Faulty Rotor Temp Monitoring Circuit.Design Mod Will Be Implemented (← links)
- 05000416/LER-1985-028, :on 850717,diesel Generator Tripped.Plant Shutdown Initiated.Caused by Failed Generator Bearing. Bearing Replaced.Generator Returned to Svc Prior to Required Shutdown (← links)
- 05000416/LER-1985-026, :on 850621,flanges Used to Perform Airlock Overall Leakage Barrel Tests Not Local Leak Rate Tested. Caused by Incorrect Conclusions of 1983 Review.Flanges Tested & Added to Surveillance Procedures (← links)
- 05000416/LER-1985-036, :on 850916,reactor Scram Occurred Due to Turbine Trip on Low Condenser Vacuum.Caused by Pump Trips on Low Lube Water Flow.Water Level Restored.Scram off-normal Event Procedure Initiated (← links)
- 05000416/LER-1996-007-03, :on 961215,inadvertent Division 2 RCIC Isolation Occurred Due to Improperly Lifted Leads.Revised Procedure to Correct Format Deficiences (← links)
- 05000416/LER-1985-024, :on 850627,reactor Manually Scrammed When Condensate Pumps & Booster Pumps Tripped.Caused by Failure of hi-hi Level Switch.Switch Replaced & All Feedwater Heater Switches Calibr (← links)
- 05000416/LER-1985-007-02, Forwards LER 85-007-02,revising Rept Submitted by .Ge Dual Solenoid Valve Number Corrected.Part 21 Related (← links)
- 05000416/LER-1985-034, :on 850819,test Canister in Standby Gas Treatment Filter Train B Found to Contain No Charcoal.On 850906,test Showed Efficiency Below Tech Spec Requirement. Canister Location in Unit Blanked Off (← links)
- 05000416/LER-1985-025, :on 850625,during Return to Svc of Reactor Water Cleanup (RWCU) Temp Switch,Fuse Blew Causing Loss of Power to RWCU Containment Isolation Logic Relay.Caused by Jumper Shorting During Removal.Fuse Replaced (← links)
- 05000416/LER-1985-032, :on 850829,discovered That on 841201 & 04, Liquid Effluent Flow Rate Estimates Exceeded 4 H Frequency of Tech Specs Requirements.Caused by Late Flow Rate Measurements.Procedural Controls Revised (← links)
- 05000416/LER-1996-006-03, :on 961127,manual Reactor Scram Occurred Due to Loss of CRD Pump.Faulty Transmitter Was Replaced & Calibration Performed in Accordance with 07-S-53-P11-6,CST Level Calibration (← links)
- 05000416/LER-1985-021, :on 850604,reactor Scrammed Due to Turbine Trip.Caused by Hydraulic Low Condenser Vacuum Trip mechanism.Off-normal Event Procedures Followed & Plant Stabilized.Steam Jet Air Ejector Lines Cleaned (← links)
- 05000416/LER-1993-001, :on 930111,discovered That No SRO in CR for Approx 5 Minutes.Caused by Decision of Plant Supervisor to Enter Stairwell.Cr Command Function Will Be Presented as Part of Continuing Training Program for SROs (← links)
- 05000416/LER-1985-017, :on 850412,charcoal Adsorber Sample Test for Train a Not Removed & Analyzed Per Tech Specs for Control Room Emergency Filtration Sys.Caused by Procedure Error. Procedures Revised (← links)
- 05000416/LER-1985-018, :on 850414,reactor Scrammed on High Level When Reactor Recirculation Pumps Transferred to Low Frequency Motor Generator Due to Performance of Calibr Procedure. Caused by Error in Procedure (← links)
- 05000416/LER-1985-020, :on 850524,reactor Scrammed from Turbine Trip Precipitated by Sequence of Actions Initiated by Loss of Power to nonsafety-related 6.9 Kv Bus.Caused by Inadequate Test Instructions.Pumps Restarted (← links)
- 05000416/LER-1992-020, :on 921215,automatic Isolation Signals to Two RCIC Sys Valves Occurred & Leak Detection Sys Annunciator for RCIC Equipment Area High Temp Alarmed.Caused by Spurious Operation of Switch.Switch Replaced (← links)
- 05000416/LER-1985-019, :on 850517,reactor Water Cleanup Sys Isolated Due to High Differential Flow Signals.Cause Not Determined. Isolation Verified & Maint Work Order Initiated on 850518 to Inspect Differential Flow Units (← links)
- 05000416/LER-1992-017, :on 920804,reactor Scrammed Due to Low Primary Water Tank Level Signal.Erroneous Signal Generated Due to Perturbations in Primary Water Level Sensing Circuitry. Updated Rept Will Be Submitted (← links)
- 05000416/LER-1985-016, :on 850407,reactor Scrammed Due to Full Steam Line Isolation.Caused by Faulty Pressure Transmitter in Div 2,producing Erroneous Isolation Signal.Transmitter Cleaned,Reterminated,Calibr & Returned to Svc (← links)
- 05000416/LER-1985-013, :on 850403,reactor Scrammed on High Water Level During Startup Testing.Caused by Failure of Level Channel Selector Switch.Switch Replaced & Precautionary Steps Added to Operating Instructions (← links)
- 05000416/LER-1985-014, :on 850401,Tech Spec Limiting Condition of Operation Action Statement Not Reported When Main Steam Line High Flow Isolation Channel a Remained Inoperable Beyond 2 H Limit & Required Trip Signal Not Provided (← links)
- 05000416/LER-1985-015, :on 850404,RCIC Sys Inadvertently Isolated When Bypass Switch Mistakenly Returned to Normal During Testing.Caused by Misunderstanding Between Personnel.Sys Restored.Need for Clear Communication Stressed (← links)
- 05000416/LER-1992-019, :on 921104,UFSAR for Facility Does Not Correctly Reflect Iodine Dose Conversion Factors Employed in Design Basis Loca.Caused by Inadequate Documentation of Design Basis Assumptions.Ufsar Updated (← links)
- 05000416/LER-1992-018, :on 921013,EDGs 11 & 12,mfg by Transamerica Delavel,Inc Rolled Via Air Start Sys More than 8 H Following Shutdown.Caused by Lack of Effective Method for Triggering Air Rolls.Requirements Amended (← links)
- 05000416/LER-1996-004-03, :on 960606,manual Reactor Scram Occurred Due to Spurious Multiple SRV Lifts.Replaced Trip Unit Card in Addition to Functionally Checking Other Card Files in Same Panel (← links)
- 05000416/LER-1992-011-01, :on 920608,nonconforming Condition Noted in Temporary Shaft Seal Constructed of Foam rubber-type Matl on SGTS Charcoal Filter Train Fan.Caused by Failure of Original Design.Shaft Seal Installations Reviewed (← links)
- 05000416/LER-1992-016, :on 920729,discovered Automatic Closure of RCIC Isolation Valve.Caused by Use of Inappropriate Trip Setpoint.Info Source Amended & Individual Planner Counseled on Event (← links)
- 05000416/LER-1984-059, :on 841221,reactor Water Cleanup Isolation Occurred Due to Read/Set Toggle Switches a & B of Temp Monitor Being in Read Position.Caused by Malfunctioning Switch.Switch Will Be Repaired (← links)
- 05000416/LER-1984-056, :on 841219,RCIC Sys Containment Isolation Valve Closed on High Steam Low Signal.Caused by Spurious High Flow Signal Produced by Pressure Oscillations in Sensing Line. Pressure Equalized in Sensing Lines (← links)
- 05000416/LER-1984-057, :on 841221,reactor Scram Occurred When Condensate Pumps & Booster Pumps Tripped.Caused by Inability of Precoat Filters to Provide Required Sys Flow for Pumps. Condensate Operating Instructions Revised (← links)
- 05000416/LER-1985-008-01, :on 850213,instrument Air Compressor Tripped Due to Low Cooling Water Pressure.Caused by Air Usage Pulling Header Pressure Down Low Enough to Isolate Precoat Filters.Design Enhancements Planned (← links)
- 05000416/LER-1984-055, :on 841130,discrepancies Identified Between Design & Commitments to Reg Guide 1.63 Involving Overcurrent Protection of Containment Penetrations (← links)
- 05000416/LER-1985-006, :on 850207,RCIC Turbine Steam Supply Inboard Isolation Valve Isolated on Spurious RHR Equipment Area High Ambient Temp Signal.Cause Undetermined.Alarm Invalid & RCIC Sys Returned to Standby (← links)
- 05000416/LER-1985-002, :on 850129,while Placing Heater Drain Pump in Forward Mode,Reactor Scrammed Following Trip of Both Operating Reactor Feed Pumps.Caused by Excessive Differential Pressure Across Valve N23-F054 (← links)
- 05000416/LER-1985-004, :on 850127,during Testing on Feedwater Sys, Reactor Scrammed.Caused by Imbalanced Feed Pump Flow.Level Restored W/Pump in Manual Control (← links)
- 05000416/LER-1985-005, :on 850129,portion of Intermediate Range Monitor Surveillance Not Performed within Required Limit Following Reactor Scram.Caused by Personnel Error. Surveillance Performed (← links)
- 05000416/LER-1996-003-03, :on 960327,reactor Water Cleanup Sys Isolation Occurred Due to High Differential Flow.Restored RWCU Sys to Operation (← links)
- 05000416/LER-1984-044, :on 841006,Div 1 Reactor Water Cleanup Sys Containment Isolated.Caused by Main Steam Line Temp Switch 5-amp Fuse Failure.Half Isolation Signal in Logic for Main Steam Line Isolation Valves Also Produced (← links)
- 05000416/LER-1984-042, :on 840908,walkdown of Standby Svc Water Sys Piping Revealed 12 Damaged Pipe Supports on Loop B Piping to & from Fuel Pool Cooling Hxs.Evaluation Revealed Water Hammer Transient Experienced (← links)
- 05000416/LER-1984-043, :on 841002,Div 2 Suppression Pool Makeup Sys Initiated & Dumped Water from Upper Containment Pool Into Suppression Pool.Caused by Two Relays Labeled W/Same Identification Number.Labels Corrected (← links)
- 05000416/LER-1985-003, :on Five Occasions from Oct 1984 - Jan 1985 Chemistry Personnel Failed to Perform Dose Equivalent Iodine/Isotopic Analyses Following Reactor Scrams.Caused Partially by Confusion Re Tech Spec (← links)
- 05000416/LER-1984-024, :on 840502,plant Shutdown Due to Inoperability of Both Independent Containment Spray Loops of RHR Sys. Caused by Two Cracks Found in 3-inch Pipe.Damaged 3-inch Pipe Removed.Procedure Revised (← links)
- 05000416/LER-1984-058, :on 841224,reactor Scrammed on Intermediate Range Monitors hi-hi Flux Trip.Caused by Failure to Realize Effect of Change in Feedwater Flow on Power When Turbine & Bypass Control Valves Closed (← links)
- 05000416/LER-1992-013, :on 920618,reactor Scram Occurred Due to Turbine Control Fluid Filter Maint.Caused by Lack Of/Poor Communication.Preventative Maint Program Will Be Established (← links)
- 05000416/LER-1984-060, :on 841228,main Turbine Overspeed Protection Sys Surveillance Not Performed within 14 Days as Required When Plant Operation in Modes 1 & 2.Caused by Personnel Error.Item Included in Computer Tracking Sys (← links)
- 05000416/LER-1984-061, :on 841228,person Performing Fire Watch Patrol Became Locked in RHR a Piping Room Because Door Handle on Inside of Door 1A204 Broken.Security Will Be Notified by Fire Watch Persons Before Entry Into Area (← links)
- 05000416/LER-1992-010, :on 920606,reactor Scrammed Due to RPS Actuation Signal from APRM Sys.Caused by Lightning Strike Due to Electrical Storm in Plant Vicinity.Task Force Assembled & Ferrite Beads Installed in APRM (← links)
- 05000416/LER-1992-001-03, :on 920108,RHR Sys Pump Suction Valve Failed to Open During Alignment.Caused by Valve Phenomenon Known as Pressure Locking.Interim Procedural Controls Implemented for Problem Until Sys Mods Implemented (← links)
- 05000416/LER-1992-012, :on 920610,determined That Previously Identified Deficiency Re Potential Secondary Containment Bypass Leakage Affeted Operability of Sgts.Sgts Leakage Paths Repaired (← links)
- 05000416/LER-1992-011, :on 920608,discovered Possibility of Potential Secondary Containment Bypass Leakage Paths & Control Room Boundary Leakage Paths.On 911009,temporary Shaft Seal Installed in Sgts.Also Reported Per Part 21 (← links)
- 05000416/LER-1984-054, :on 841129,time Limit for Tech Specs 4.11.2.2 & 4.11.2.3 Exceeded When Effluent Cumulative Dose Calculations & Surveillance Not Performed.Caused by Personnel Error. Surveillance Completed on 841130 (← links)
- 05000416/LER-1984-052, :on 841124,scram Occurred on Low Reactor Water Level.Caused by Opening of Feedwater Isolation Valve Per Cleanup Procedure.Level Restored by Resetting Reactor Feed Pump Turbine a (← links)
- 05000416/LER-1984-053, :on 841129,reactor Manual Scram Initiated During Vessel Level Transient,Causing HPCS Actuation.Cause Undetermined.Mods to Special Test Equipment Made (← links)
- 05000416/LER-1992-006, :on 920428,operators Received Alarm,Indicating Actuation of RPS Via Channel G of APRM Sys.On 920427, Excessive Undervessel Leakage Occurred.Caused by Electrical Short.Uncoupling Tool Removed from Svc (← links)
- 05000416/LER-1984-051, :on 841102 & 03,two RCIC Isolations Occurred Due to High Flow on RCIC Steam Line.Caused by Water Collected in Elbow Top Loop Seals for Steam Flow Transmitter.Pressure Equalized (← links)
- 05000416/LER-1996-002-02, :on 960126,routine Maint Rendered HPCS EDG Inoperable Due to Leak from Lube Oil Strainer.Personnel Counseled & Strainer Tighten (← links)
- 05000416/LER-1984-049, :on 841031,continuous Fire Watch on Fire Door Not Established.On 841029,smoke Detector Found Inoperable. Caused by Shift Supervisor Not Realizing That Conditions Associated (← links)
- 05000416/LER-1995-012, :on 951102,discovered That Allowable Opening Area for CR Envelope Boundary Exceeded.Caused by Inaffective or Incomplete C/A of Previous CR Envelope Event.Wos for Control Bldg Verified & Access Panels Labeled (← links)
- 05000416/LER-1985-011, :on 850226,QA Audit Revealed Two Occasions Where Halon Tank Pressures Incorrectly Determined to Be within Acceptance Criteria During Halon Tank Pressure Checks.Caused by Mechanic Errors (← links)
- 05000416/LER-1996-001, :on 951111,HPCS Sdg Started on Valid Initiation Signal.Caused by Inclement Weather in Area of Plant Site.No Corrective Action Necessary (← links)
- 05000416/LER-1985-009, :on 850215,ESF Actuated Due to Pressure Disturbance on Instrument Ref Leg.Caused by Technician Restoring Vessel Level Instrument to Svc.All Sys Returned to Normal Status (← links)
- 05000416/LER-1984-045, :on 841014,adverse Weather Conditions Resulted in Voltage Transients on 500-kV Incoming Line.Caused by Precoat Bypass Valve Not Opening Immediately When Precoat Filter Valves Closed (← links)
- 05000416/LER-1984-048, :on 841020,discovered That Electrical Power Supply to Fuel Handling Area Ventilation Exhaust Flow Rate Monitor & Sample Rate Flow Monitor Isolated.Caused by Operator Error (← links)
- 05000416/LER-1984-047, :on 841018,bypass Switches of Leakage Detection Sys on Reactor Water Cleanup,Rhr & RCIC Placed in Bypass for Maint Troubleshooting,Violating Tech Specs (← links)
- 05000416/LER-1984-046, :on 841017,reactor Water Cleanup Sys Containment Isolation Valves Isolated False Reactor Water Cleanup Room 2 High Differential Temp Signal.Cause Undetermined.Trip Signals Cleared (← links)
- 05000416/LER-1992-015, :on 920709,automatic Actuation of RWCU Sys Inboard Containment Isolation Valves Occurred & Leak Detection RWCU HX Room High Temp Annunicator Alarmed.Caused Not Yet Determined.Investigation Underway (← links)
- 05000416/LER-1992-014, :on 920625,automatic Actuation of RWCU Sys Outboard Containment Isolation Valves Occurred & Main Steam Line Tunnel High Temp Annunciator Alarmed.Caused by Receipt of Lds Trip Signal.Temp Switches Calibr (← links)
- 05000416/LER-1984-039, :on 840818,reactor Water Cleanup Sys Tripped When Containment Isolation Valve Closed.Cause of Isolation Signal Could Not Be Determined (← links)
- 05000416/LER-1984-038, :on 840815,determined Surveillance Requirements of Tech Spec 4.8.1.1.2.c Not Fully Met on 840208 & 0503 for Diesel Generator Fuel Viscosity Analysis & on 840524 for Gas Turbine Generator Fuel Viscosity (← links)
- 05000416/LER-1984-037, :on 840813,limiting Condition for Operation Time Limit for Sampling Exceeded Due to Inoperability of Radwaste Bldg Noble Gas Activity Monitor.Caused by Personnel Error.Chemists Reinstructed (← links)
- 05000416/LER-1992-008, :on 920519,several Ci Valves Closed When Power Was Lost to Sys Relays Due to Blown Fuse.Caused by Design of Associated Panel & Relay Base.Personnel Advised to Exercise Caution When Performing Task (← links)
- 05000416/LER-1992-007, :on 920511,determined That TOL Settings for Certain Motors May Not Be Conservative for Extended Operation Undervoltage Conditions.Caused by Applied Voltage. TOL Settings Were Optimized (← links)
- 05000416/LER-1992-002-03, :on 920320,determined That Actuators for Suppression Pool Makeup Sys Dump Valves Undersized,Per Generic Ltr 89-10.Caused by Use of Min Flowrate in Actuators.Torque Switch Setting Reset (← links)
- 05000416/LER-1992-005, :on 920421,inadvertent RWCU Sys Isolation Occurred.Caused by Personnel Error.Conduct of Operations procedure,01-S-06-2 & Control & Use of Operations Section procedure,02-S-01-2 Were Modified (← links)
- 05000416/LER-1992-004, :on 920414,discovered That Both Divs of Drywell Purge Sys Inoperable.Caused by Incomplete Component Designation Stencilled on Valve.Incomplete Stencil Corrected & Operator Training Program Revised (← links)
- 05000416/LER-1984-036, :on 840727,channels a & B of Reactor Water Cleanup Sys Differential Flow Isolation Trip Found to Exceed Tech Spec Setpoint Limits.Caused by Change in Calibr Data. Surveillance Will Be Completed by Startup (← links)
- 05000416/LER-1984-035, :on 840519,analyses Performed on Radioactive Gaseous Waste Samples Discovered to Be Inadequate,Causing Surveillance Test Frequency to Be Exceeded.Caused by Personnel Error.Software to Be Modified (← links)
- 05000416/LER-1995-013, :on 951204,plant Confirmed Nonconservative Error in Core Thermal Power Calculation.Caused by Failure to Account for Flow Path in Original Vendor Supplied Heat Balance Equations.Adjusted Inputs (← links)
- 05000416/LER-1992-003, :on 920327,inadvertent Breaker Opening Resulted in Isolation of ESF Secondary Containment Isolation Valves. Caused by Personnel Error.Power Restored to Affected Components & Isolation Valves Reopened (← links)
- 05000416/LER-1984-034, :on 840719,during Nonroutine Test,Reactor Protection Sys Motor Generator Set a Output Breaker Tripped, Resulting in Isolation of Both Shutdown Cooling Loops.Caused by Personnel Clumsiness.Power Restored (← links)
- 05000416/LER-1984-033, :on 840702,reactor Scram & Secondary Containment Isolation Occurred.Caused by Closed Air Dryer Outlet Valve P53-F496.Instructions Will Be Revised to Require Locked Open Valve (← links)
- 05000416/LER-1984-031, :on 840601,plant Shutdown Commenced Following Notification to NRC of Deficiency Re Low Flow Rate in Standby Svc Water Sys Due to Higher than Anticipated Frictional Pressure Drops Through Component Loop (← links)
- 05000416/LER-1984-031-01, Forwards LER 84-031-01 & Rept on Investigation Performed to Determine Unit 1 Dependence on Unit 2 Sys,Structures & Components (← links)
- 05000416/LER-1984-032, :on 840628,during Reactor Vessel Nuclear Heatup,Data Taken to Determine Condensate Pot Movement on Vessel Level Instrumentation.Revised Calibr Procedures Found Three Transmitters Outside Tech Spec Limits (← links)
- 05000416/LER-1984-041, :on 840909,more than One Jet Pump Failed diffuser-to-lower-plenum Differential Pressure Surveillance Testing.Cause Not Stated.Three Transmitters Replaced & Three Recalibr (← links)
- 05000416/LER-1984-040, :on 840905,scram Occurred While Control Rods Being Withdrawn.Caused by Intermediate Range Monitors Not Ranging Up During Response to Power Level Increase.Procedure Requirements Revised (← links)
- 05000416/LER-1995-011, :on 950917,trip of B Reactor Feed Pump Turbine Occurred.Caused by Partial Loss of Feedwater.Reactor Level Stabilized & Sys Secured (← links)
- 05000416/LER-1984-026, :on 840601,discovered That Since 840524,fuel Oil Day Tank for One Gas Turbine Would Hold Only 270 Gallons.Cause Not Listed.Addl Day Tank Installed to Yield Total Capacity Greater than 700 Gallons (← links)
- 05000416/LER-1991-016-02, :on 911230,reactor Recirculation Water Pump B Control Rod Insertion Suspended,Resulting in Increase in Reactor Power W/No Control Rod Motion.Caused by Decrease in Moderator Temp.Drain Valves Will Remain Closed (← links)
- 05000416/LER-1984-030, :on 840525,reactor Scrammed on Low Water Level & Signal Following Condensate Booster Pump & Reactor Feed Pump Trips.Caused by Broken Position Arm Linkage on Condensate Min Flow Control Valve (← links)
- 05000416/LER-1995-010, :on 950730,reactor Scram Occurred Due to Main Turbine/Generator Trip.Caused by Failure of Current Transformer (CT) on a Phase for Generator Output Breaker. Failed CT Replaced in Kind & Returned to Svc (← links)
- 05000416/LER-1984-028, :on 840507,during Storm,Arcing Occurred Across Open Disconnect for 500 Kv Switchyard Breaker,Causing Loss of Power Which Resulted in Reactor Water Cleanup Reactor Isolation.Plant Shut Down (← links)
- 05000416/LER-1984-020-01, Revised LER 84-020-01:on 840423,24 & 0514,during Startup, Five Reactor Water Cleanup Sys Isolations Occurred Due to Feedwater Flow Oscillations (← links)
- 05000416/LER-1984-027, :on 840503,offsite Power Supply to ESF Transformer 12 from 115 Kv Line Lost During Electrical Storm,Resulting in Deenergization of Div 1 & Div 3 ESF Buses.Caused by Lightning Strike (← links)
- 05000416/LER-1984-025, :on 840501,drywell Purge Sys Surveillance Performed on 830817 Not Adequate to Insure Tech Spec Flow Requirements Met Prior to 830925 & 840422 Startups.Caused by Use of Incorrect Surveillance Procedure (← links)
- 05000416/LER-1984-002-02, Final LER 84-002-02:on 840107,09,11,14,19 & 20 & 0223 & 24, Reactor Protective Sys Bus Breaker Trips Resulted in Loss of Shutdown Cooling.Trip on 840119 Caused by Circuit Board Failure.Remainder Caused by Voltage Transients (← links)
- 05000416/LER-1984-023, :on 840430,reactor Recirculation Conductivity Monitor Inoperable.Caused by Failed Surveillance. Communications Improved to Prevent Recurrence (← links)
- 05000416/LER-1984-005-01, Updated LER 84-005-01:on 840119,drywell Purge Compressor Logic a Relay Compressor Inadvertently Started.Caused by Defective Procedure.Memo Written to All Technical Section Engineers Re Adequate Engineering Review (← links)
- 05000416/LER-1984-011, :on 840309,arcing Occurred in 500 Kv Switchyard Breaker,As Breaker Returned to Svc After Maint.Cause Unknown.Phase B of Breaker Being Completely Overhauled (← links)
- 05000416/LER-1995-009-01, :on 950717,HPCS Injection Occurred Due to Invalid Low Water Level Signal.Tripped HPCS Pump & Restored HPCS Sys to Standby (← links)
- 05000416/LER-1995-008-01, :on 950712,inadvertent Reactor Scram Occurred Due to Turbine Trip on Loss of Condenser Vacuum.Replaced Failed Ethylene Propylene Expansion Joint W/Neoprene Expansion Joint (← links)
- 05000416/LER-1984-008, :on 840202,during Cold Shutdown,Control Power to HPCS Pump Lost.Caused by Incorrect Info on Electrical Lineup Sheet of Sys Operating Instruction.Instructions Changed to Correct Breaker Info (← links)
- 05000416/LER-1984-003, :on 840210,while Power Removed from Control Room Fresh Air Unit Chlorine Detector B,Per Maint Work Order,Unit Started Up Automatically in Isolation Mode.Caused by Personnel Error.Personnel Counseled (← links)
- 05000416/LER-1984-006, :on 840120,during Drywell High Pressure Channel a Functional Test,Indicator Light Failed to Illuminate.Caused by Failure of Test Procedure to Properly Instruct Technicians.Procedure Being Revised (← links)
- 05000416/LER-1995-007-01, :on 950703,reactor Scram Occurred.Caused by Absence of Trip Indication in Conjunction W/Performance of Monthly High Level Trip Functional Surveillance.Blown Fuses & Burnt Out Light Bulb Replaced (← links)
- 05000416/LER-1991-013-04, :on 911119,improperly Installed Conduit Seals Provided Flow Path for Rainwater to Enter Secondary Containment.Caused by Manhole Not Being Scaled Per Plant Design Drawing.Conduits Inspected (← links)
- 05000416/LER-1983-181-03, Channel C as-found Setpoints for Undervoltage Trip Were 116.2-volt Ac.Cause Unknown.Voltage Adjusted within Desired Range (← links)
- 05000416/LER-1983-180-03, Drywell Floor Drain Sump Level & Flow Monitoring Leak Detection Sys Discovered Inoperable.Cause Undetermined.Sys Monitored for 2 Wks W/O Repeating Problem (← links)
- 05000416/LER-1991-015-02, :on 911123,automatic Actuation of RWCU Sys Outboard Containment Isolation Valves Occurred.Possibly Caused by Trip Signal from RWCU Leak Detection Sys.Temp Switches Replaced (← links)
- 05000416/LER-1991-012-03, :on 911119,thunderstorm,w/severe Lightning Occurred in Site Vicinity & Div 2 APRMs Received High Neutron Flux Signal Resulting in RPS Trip.Cause Not Determined.Supplemental Rept to Be Submitted (← links)
- 05000416/LER-1983-177-03, 1102 & 06,water Collected in Offgas Pretreatment Monitor,Resulting in Improper Flow Through Monitor.Caused by Accumulation of Condensation.Heat Tracing Installed on Piping (← links)
- 05000416/LER-1984-004, :on 840114,shutdown Cooling Suction Valve Isolated.Caused by Fuse Failure During Technician Panel Work.Fuse Replaced (← links)
- 05000416/LER-1995-006-01, :on 950623,TS Violations Occurred Due to Missed Surveillance.Analyzed Addl Portions of Original 950518 Sample (← links)
- 05000416/LER-1991-011-02, :on 911003,discovered That Improper Group of Components Surveilled in 1987 for end-of-cycle Recirculation Pump Trip Sys.Caused by Inadequate Guidance in Procedures.Surveillance Performed (← links)
- 05000416/LER-1995-004, :on 950316,reactor Scram Occurred During Performance of Semiannual Surveillance on Neutron Monitoring Sys.Caused by Ground Fault on Min Flow Valve for Rcics. Ground Eliminated & Valve Returned to Svc (← links)
- 05000416/LER-1983-139-03, /03L-0:on 830912,Div 1 Reactor Protective Sys Motor Generator Set Tripped,Causing Half Scram Signal & Loss of Shutdown Cooling.Caused by Motor Winding Short.Motor Replaced (← links)
- 05000416/LER-1983-143-01, /01T-0:on 830928,component Cooling Water Process Radiation Monitor Sample Pump Found Not Operating Properly. Cause of Pump Being Secured Not Yet Identified.Pump Restarted.Pumps Added to Daily Surveillance (← links)
- 05000416/LER-1983-069-03, RHR Sys Shutdown Cooling Mode & Reactor Water Cleanup Sys Isolated.Caused by Failure to Replace Power Fuses to Isolation Logic.Fuses Replaced (← links)
- 05000416/LER-1983-115-03, /03L-0:on 830804,faulty Interconnection Between Div I 120-volt Ac & 125-volt Dc Circuits Discovered.Caused by Incorrect Termination of 120-volt Ac Cable.Cable Disconnected (← links)
- 05000416/LER-1983-070-03, Reactor Water Cleanup Sys Isolated When Standby Liquid Control Pump Breaker B Closed. Caused by Procedural Inadequacy.Standby Liquid Control Operating Instruction Revised (← links)
- 05000416/LER-1983-077-03, /03L-0:on 830622,while Performing Control Room Standby Fresh Air Unit a Monthly Surveillance,Unit Heater Failed to Operate.Caused by Malfunctioning Control Relay. Relay Replaced (← links)
- 05000416/LER-1991-005-03, :on 910617,fault Occurred on B-phase of Breaker J5232,resulting in Loss of Power to Two balance-of-plant & ESF Buses.Caused by Generation of Main Turbine Trip Signal. High Pressure Tanks Replaced (← links)
- 05000416/LER-1984-021, :on 840501,main Condenser Offgas Treatment Sys Grab Samples Obtained 3 to 20 Minutes After 4 H Requirement. Error Due to Misinterpretation of Tech Spec 4.0.2 (← links)
- 05000416/LER-1984-020, :on 840423 & 24,during Startup,Four Reactor Water Cleanup Sys Isolations Occurred Due to Feedwater Flow Oscillations (← links)
- 05000416/LER-1984-019, :on 840418,circuit Design Deficiency Affecting 10 Isolation Valves Discovered.Design Change Implemented, Altering Logic Such That Valves Will Isolate W/Manual Initiation (← links)
- 05000416/LER-1984-017, :on 840409,containment Isolation Valves for Reactor Water Cleanup Sys Isolated on False HX Room High Temp Signal.Cause Attributed to Radio Transmission in Upper Control Room (← links)
- 05000416/LER-1984-015, :on 840326,control Room Fresh Air Unit B Inadvertently Started in Isolation Mode.Caused by Technician Touching Terminal W/Jumper Which Caused Relay to Drop Out & Start Fresh Air Unit (← links)
- 05000416/LER-1984-016, :on 840324,during Test to Measure LPCI a Isolation Valves,Div 1 Containment Isolated & Auto Start Signal Sent to Div 1 Diesel Generator.Caused by Procedure Error.Personnel Cautioned (← links)
- 05000416/LER-1983-037-03, /03L-0:on 830123,one Air Start Receiver for Diesel Generator 12 Found Pressurized to Less than Min Tech Spec Requirement.Caused by Stuck Valve on Inlet to Air Dryer for Electric Driven Air Compressor (← links)
- 05000416/LER-1983-030-99, /99X-0:on 830109,Halon Control Panel Q1H13P917 Trouble Alarm Annunicated W/No Fire or Smoke Present & Would Not Reset.Caused by Loose Detector Mounting.Loose Screws Tightened.Fire Watch Established (← links)
- 05000416/LER-1995-005-01, :on 950419,unplanned ESF Actuation Occurred Due to Reliance on Inadequate Impact Statement.Breaker Reclosed & Affected Sys Restored to pre-event Status (← links)
- 05000416/LER-1982-185-03, /03L-0:on 821229,smoke Detection Zone 2-17 (East Corridor of Auxiliary Bldg;Elevation 103 Ft) Alarmed & Would Not Reset.No Fumes or Smoke Present.Caused by Spurious Actuation.Zone Returned to Operation on 830112 (← links)