Pages that link to "05000321/LER-2020-001, A EDG Inoperable Due to Water in the Day Tank"
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The following pages link to 05000321/LER-2020-001, A EDG Inoperable Due to Water in the Day Tank:
Displayed 3 items.
- ML20345A083 (redirect page) (← links)
- 05000321/LER-2020-001 (redirect page) (← links)
- 05000321/LER-2012-003, Leak in Reactor Pressure Boundary at Small Bore Piping Fillet Weld (← links)
- 05000321/LER-2001-003 (← links)
- 05000321/LER-2001-002 (← links)
- 05000321/LER-2001-001 (← links)
- 05000321/LER-1982-057, Forwards LER 82-057/03L-0 (← links)
- 05000321/LER-1982-056, Forwards LER 82-056/03L-0 (← links)
- 05000321/LER-1982-059, Forwards LER 82-059/03L-0 (← links)
- 05000321/LER-1982-055, Forwards LER 82-055/03L-0 (← links)
- 05000321/LER-1982-046, Forwards LER 82-046/03L-0 (← links)
- 05000321/LER-1982-052, Forwards LER 82-052/03L-0 (← links)
- 05000321/LER-1982-053, Forwards LER 82-053/03L-0 (← links)
- 05000321/LER-1982-029, Forwards LER 82-029/03L-0 (← links)
- 05000321/LER-1982-043, Forwards LER 82-043/03L-0 (← links)
- 05000321/LER-1982-047, Forwards LER 82-047/03L-0 (← links)
- 05000321/LER-1982-051, Forwards LER 82-051/03L-0 (← links)
- 05000321/LER-1982-050, Forwards LER 82-050/03L-0 (← links)
- 05000321/LER-1982-049, Forwards LER 82-049/01T-0 (← links)
- 05000321/LER-1982-048, Forwards LER 82-048/03L-0 (← links)
- 05000321/LER-1982-038, Forwards LER 82-038/03L-0 (← links)
- 05000321/LER-1982-010, Forwards LER 82-010/03L-0 (← links)
- 05000321/LER-1982-039, Forwards LER 82-039/03L-0 (← links)
- 05000321/LER-1982-040, Forwards LER 82-040/03L-0 (← links)
- 05000321/LER-1982-036, Forwards LER 82-036/03L-0 (← links)
- 05000321/LER-1982-042, Forwards LER 82-042/03L-0 (← links)
- 05000321/LER-1982-023, Forwards LER 82-023/03L-0 (← links)
- 05000321/LER-1982-025, Forwards LER 82-025/03L-0 (← links)
- 05000321/LER-1982-091, Forwards LER 82-091/03L-0 (← links)
- 05000321/LER-1982-084, Forwards LER 82-084/03L-0 (← links)
- 05000321/LER-1982-086, Forwards LER 82-086/03L-0 (← links)
- 05000321/LER-1982-083, Forwards LER 82-083/03L-0 (← links)
- 05000321/LER-1982-071, Forwards LER 82-071/03L-0 (← links)
- 05000321/LER-1982-082, Forwards LER 82-082/03L-0 (← links)
- 05000321/LER-1982-065, Forwards LER 82-065/03L-0 (← links)
- 05000321/LER-1983-001, Forwards LER 83-001/03L-0 (← links)
- 05000321/LER-1983-005, Forwards LER 83-005/03L-0 (← links)
- 05000321/LER-1983-004, Forwards LER 83-004/03L-0 (← links)
- 05000321/LER-1982-099, Forwards LER 82-099/03L-0 (← links)
- 05000321/LER-1982-074, Forwards LER 82-074/03L-0 (← links)
- 05000321/LER-1982-079, Forwards LER 82-079/03L-0 (← links)
- 05000321/LER-1982-081, Forwards LER 82-081/03L-0 (← links)
- 05000321/LER-1982-075, Forwards LER 82-075/03L-0 (← links)
- 05000321/LER-1982-077, Forwards LER 82-077/03L-0 (← links)
- 05000321/LER-1982-080, Forwards LER 82-080/01T-0 (← links)
- 05000321/LER-1982-069, Forwards LER 82-069/03L-0 (← links)
- 05000321/LER-1982-076, Forwards LER 82-076/03L-0 (← links)
- 05000321/LER-1982-070, Forwards LER 82-070/03L-0 (← links)
- 05000321/LER-1982-073, Forwards LER 82-073/03L-0 (← links)
- 05000321/LER-1982-072, Forwards LER 82-072/03L-0 (← links)
- 05000321/LER-1982-066, Forwards LER 82-066/03L-0 (← links)
- 05000321/LER-1982-064, Forwards LER 82-064/03L-0 (← links)
- 05000321/LER-1982-068, Forwards LER 82-068/03L-0 (← links)
- 05000321/LER-1982-063, Forwards LER 82-063/03L-0 (← links)
- 05000321/LER-1982-067, Forwards LER 82-067/01T-0 (← links)
- 05000321/LER-1981-123, Forwards LER 81-123/03L-0 (← links)
- 05000321/LER-1981-124, Forwards LER 81-124/03L-0 (← links)
- 05000321/LER-1981-115, Forwards LER 81-115/03L-0 (← links)
- 05000321/LER-1982-062, Forwards LER 82-062/03L-0 (← links)
- 05000321/LER-1982-061, Forwards LER 82-061/03L-0 (← links)
- 05000321/LER-1980-109, Forwards LER 80-109/03L-0 (← links)
- 05000321/LER-1978-096, Forwards LER 78-096/01T-0 (← links)
- 05000321/LER-1981-120, Updated LER 81-120/01T-1:on 811105,AE Advised That in Event of Main Steamline Break or Scram Discharge,Isolation of HPCI & Reactor Core Isolation Cooling Sys Could Occur.Caused by Erroneous Analysis.Event Would Not Occur (← links)
- 05000321/LER-1978-081, Forwards LER 78-081/03L-0 (← links)
- 05000321/LER-1978-088, Forwards LER 78-088/03L-0 (← links)
- 05000321/LER-1978-084, Forwards LER 78-084/03L-0 (← links)
- 05000321/LER-1978-083, Forwards LER 78-083/03L-0 (← links)
- 05000321/LER-1978-082, Forwards LER 78-082/03L-0 (← links)
- 05000321/LER-1978-079, Forwards LER 78-079/03L-0 (← links)
- 05000321/LER-1978-068, Forwards LER 78-068/03L-0 (← links)
- 05000321/LER-1978-080, Forwards LER 78-080/03L-0 (← links)
- 05000321/LER-1978-073, Forwards LER 78-073/03L-0 (← links)
- 05000321/LER-1978-075, Forwards LER 78-075/03L-0 (← links)
- 05000321/LER-1978-078, Forwards LER 78-078/03L-0 (← links)
- 05000321/LER-1978-076, Forwards LER 78-076/03L-0 (← links)
- 05000321/LER-1978-074, Forwards LER 78-074/03L-0 (← links)
- 05000321/LER-1978-071, Forwards LER 78-071/03L-0 (← links)
- 05000321/LER-1978-077, Forwards LER 78-077/01T-0 (← links)
- 05000321/LER-1982-045, Forwards LER 82-045/03L-0 (← links)
- 05000321/LER-1982-035, Forwards LER 82-035/03L-0 (← links)
- 05000321/LER-1983-012, Forwards LER 83-012/03L-0 (← links)
- 05000321/LER-1982-101, Forwards LER 82-101/01T-0 (← links)
- 05000321/LER-1982-085, Forwards LER 82-085/03L-0 (← links)
- 05000321/LER-1982-097, Forwards LER 82-097/01T-0.Detailed Event Analysis Encl (← links)
- 05000321/LER-1983-033, Forwards LER 83-033/03L-0 (← links)
- 05000321/LER-1983-027, Forwards LER 83-027/03L-0 (← links)
- 05000321/LER-1983-025, Forwards LER 83-025/03L-0 (← links)
- 05000321/LER-1983-019, Forwards LER 83-019/03L-0 (← links)
- 05000321/LER-1981-126, Forwards LER 81-126/03L-0 (← links)
- 05000321/LER-1981-130, Forwards LER 81-130/03L-0 (← links)
- 05000321/LER-1981-117, Forwards LER 81-117/03L-0 (← links)
- 05000321/LER-1983-015, Forwards LER 83-015/03L-0 (← links)
- 05000321/LER-1981-128, Forwards LER 81-128/03L-0 (← links)
- 05000321/LER-1983-009, Forwards LER 83-009/03L-0 (← links)
- 05000321/LER-1982-093, Forwards LER 82-093/03L-0 (← links)
- 05000321/LER-1982-087, Forwards LER 82-087/03L-0 (← links)
- 05000321/LER-1982-096, Forwards LER 82-096/03L-0 (← links)
- 05000321/LER-1982-092, Forwards LER 82-092/03L-0 (← links)
- 05000321/LER-1980-062, Forwards Updated LER 80-062/01X-1 (← links)
- 05000321/LER-1979-001, Forwards LER 79-001/03L-0 (← links)
- 05000321/LER-1983-041, Forwards LER 83-041/03L-0 (← links)
- 05000321/LER-1983-008, Forwards LER 83-008/03L-0 (← links)
- 05000321/LER-1983-010, Forwards LER 83-010/03L-0 (← links)
- 05000321/LER-1982-090, Forwards LER 82-090/03L-0 (← links)
- 05000321/LER-1981-109, Forwards Updated LER 81-109/03X-1 (← links)
- 05000321/LER-1982-098, Forwards LER 82-098/03L-0 (← links)
- 05000321/LER-1983-047, Forwards LER 83-047/03L-0 (← links)
- 05000321/LER-1979-021, Forwards Supplemental Narrative Summary to LER-79-021/03L-0, Rev 5 Re Tritium Levels in Groundwater for Second Quarter 1983 Exceeding ETS Levels (← links)
- 05000321/LER-1983-042, Forwards LER 83-042/03L-0 (← links)
- 05000321/LER-1983-046, Forwards LER 83-046/03L-0 (← links)
- 05000321/LER-1983-044, Forwards LER 83-044/03L-0 (← links)
- 05000321/LER-1983-043, Forwards LER 83-043/03L-0 (← links)
- 05000321/LER-1983-038, Forwards LER 83-038/03L-0 (← links)
- 05000321/LER-1981-026, Forwards Updated LER 81-026/01X-1 (← links)
- 05000321/LER-1983-036, Forwards LER 83-036/01T-0 (← links)
- 05000321/LER-1983-028, Forwards LER 83-028/03L-0 (← links)
- 05000321/LER-1983-029, Forwards LER 83-029/03L-0 (← links)
- 05000321/LER-1983-032, Forwards LER 83-032/03L-0 (← links)
- 05000321/LER-1983-013, Forwards LER 83-013/03L-0 (← links)
- 05000321/LER-1983-026, Forwards LER 83-026/03L-0 (← links)
- 05000321/LER-1979-007, Forwards LER 79-007/03L-0 (← links)
- 05000321/LER-1979-010, Forwards LER 79-010/03L-0 (← links)
- 05000321/LER-1983-024, Forwards LER 83-024/03L-0 (← links)
- 05000321/LER-1983-023, Forwards LER 83-023/03L-0 (← links)
- 05000321/LER-1982-095, Forwards Updated LER 82-095/03X-1 (← links)
- 05000321/LER-1983-016, Forwards LER 83-016/03L-0 (← links)
- 05000321/LER-1983-030, Forwards LER 83-030/03L-0 (← links)
- 05000321/LER-1983-022, Forwards LER 83-022/03L-0 (← links)
- 05000321/LER-1983-020, Forwards LER 83-020/03L-0 (← links)
- 05000321/LER-1983-018, Forwards LER 83-018/03L-0 (← links)
- 05000321/LER-1981-018, Forwards Updated LER 81-018/01X-1 (← links)
- 05000321/LER-1983-007, Forwards LER 83-007/03L-0 (← links)
- 05000321/LER-1983-011, Forwards LER 83-011/03L-0 (← links)
- 05000321/LER-1982-004, Forwards LER 82-004/03L-0 (← links)
- 05000321/LER-1983-006, Forwards LER 83-006/03L-0 (← links)
- 05000321/LER-1983-017, Forwards LER 83-017/03L-0 (← links)
- 05000321/LER-1983-014, Forwards LER 83-014/01T-0 (← links)
- 05000321/LER-1981-094, Forwards Updated LER 81-094/03X-1 (← links)
- 05000321/LER-1981-136, Forwards Updated LER 81-136/03X-1 (← links)
- 05000321/LER-1981-129, Forwards Updated LER 81-129/01X-1 (← links)
- 05000321/LER-1979-076, Forwards Updated LER 79-076/01X-1 (← links)
- 05000321/LER-1979-103, Forwards Updated LER 79-103/03X-2 (← links)
- 05000321/LER-1980-050, Forwards Updated LER 80-050/03X-1 (← links)
- 05000321/LER-1980-121, Forwards Updated LER 80-121/03X-1 (← links)
- 05000321/LER-1980-023, Forwards Updated LER 80-023/03X-1 (← links)
- 05000321/LER-1981-090, Forwards Updated LER 81-090/01X-1 (← links)
- 05000321/LER-1980-013, Forwards Updated LER 80-013/03X-1 (← links)
- 05000321/LER-1980-058, Forwards Updated LER 80-058/03X-1 (← links)
- 05000321/LER-1980-003, Forwards Revised LER 80-003/03X-1 (← links)
- 05000321/LER-1980-059, Forwards Updated LER 80-059/03X-1 (← links)
- 05000321/LER-1980-114, Forwards Updated LER 80-114/03X-1 (← links)
- 05000321/LER-1981-131, Forwards Updated LER 81-131/03X-1 (← links)
- 05000321/LER-1981-095, Forwards Updated LER 81-095/03X-1 (← links)
- 05000321/LER-1980-098, Forwards Updated LER 80-098/03X-1 (← links)
- 05000321/LER-1979-102, Forwards LER 79-102/03L-0 (← links)
- 05000321/LER-1981-038, Forwards LER 81-038/03L-0 (← links)
- 05000321/LER-1980-035, Forwards LER 80-035/03L-0 (← links)
- 05000321/LER-1980-026, Forwards LER 80-026/03L-0 (← links)
- 05000321/LER-1980-022, Forwards LER 80-022/03L-0 (← links)
- 05000321/LER-1980-021, Forwards LER 80-021/03L-0 (← links)
- 05000321/LER-1979-105, Forwards LER 79-105/01T-0 (← links)
- 05000321/LER-1979-054, Forwards LER 79-054/06T-0 (← links)
- 05000321/LER-1979-056, Forwards LER 79-056/01T-0 (← links)
- 05000321/LER-1979-051, Forwards LER 79-051/03L-0 (← links)
- 05000321/LER-1980-055, Forwards Updated LER 80-055/01X-2 (← links)
- 05000321/LER-1980-096, Forwards Updated LER 80-096/03X-1 (← links)
- 05000321/LER-1979-073, Forwards LER 79-073/031-0 (← links)
- 05000321/LER-1997-007, Forwards LER 97-007-00,re Pneumatic Leak Which Resulted in Closure of PCIV (← links)
- 05000321/LER-1997-008, Forwards LER 97-008-00,re Personnel Error & Inadequate Procedure Which Resulted in Group 1 Isolation on Low Condenser Vacuum (← links)
- 05000321/LER-1980-040, Forwards Updated LER 80-040/03X-1 (← links)
- 05000321/LER-1980-069, Forwards Updated LER 80-069/01X-1 (← links)
- 05000321/LER-1980-016, Forwards Updated LER 80-016/03X-1 (← links)
- 05000321/LER-1981-110, Forwards Updated LER 81-110/03X-1 (← links)
- 05000321/LER-1980-127, Forwards Updated LER 80-127/03X-1 (← links)
- 05000321/LER-1980-064, Forwards Updated LER 80-064/03X-1 (← links)
- 05000321/LER-1998-002, Forwards LER 98-002-00,re Blown Fuse Which Resulted in Unplanned Actuations of Engineered Safety Features IAW 10CFR50.73(a)(2)(iv) Requirements (← links)
- IR 05000321/2021001 (← links)
- 05000321/LER-1982-060, Forwards LER 82-060/01T-0 (← links)
- 05000321/LER-1982-034, Forwards Updated LER 82-034/03L-1 (← links)
- 05000321/LER-2024-003, Reactor Core Isolation Cooling (RCIC) System Inoperable Due to Mispositioned Link (← links)
- 05000321/LER-2024-002-01, Incorrectly Installed Temporary Modification Results in Multiple Conditions Prohibited by Plant Technical Specifications (← links)
- 05000321/LER-2024-002, Manual Reactor Trip Due to Loss of Feedwater (← links)
- 05000321/LER-2024-001, Primary Containment Penetration Exceeded Maximum Allowable Primary Containment Leakage Rate (La) (← links)
- 05000321/LER-2022-001, Manual Reactor Scram Due to Reactor Pressure Perturbations (← links)
- 05000321/LER-2021-003, High Pressure Coolant Injection System Discharge Valve Failure to Open (← links)
- 05000321/LER-2021-002, Low Pressure Coolant Injection Inoperable Longer than the Allowed Technical Specification Completion Time (← links)
- 05000321/LER-2021-001, Edwin L Hatch Nuclear Plant, Unit 1 Re Automatic Reactor Scram on Low Reactor Water Level Due to Loss of Reactor Feed Pumps (← links)
- 05000321/LER-2020-001, A EDG Inoperable Due to Water in the Day Tank (← links)
- 05000321/LER-1989-003-01, :on 890302,determined That Monthly Functional Test Required by Tech Specs Tables 4.1-1 & 4.2-9 Not Performed Since 881210.Caused by Software Deficiency.Test Performed & Surveillance Task Reactivated (← links)
- 05000321/LER-1989-004-02, :on 890307,24 H Surveillance Scheduled to Verify Integrity of Recirculation Sys Jet Pumps Delayed Due to Personnel Errors,Then Executed Incorrectly.Surveillance Satisfactorily Performed 2 H Later (← links)
- 05000321/LER-1989-011-02, :on 890901,personnel Made Aware That Procedures 34GO-OPS-013-1S & 2S Did Not Fully Verify Operability of Rod Worth Minimizer as Required by Tech Spec.Caused by Procedural Error.Procedures Revised (← links)
- 05000321/LER-1987-011, :on 870723,reactor Water Level Decreased to Reactor Protection Sys Actuation Setpoint & Reactor Scram Occurred.Caused by Equipment Failure Due to Inadequate Ventilation Design.Inverter Refurbished (← links)
- 05000321/LER-1998-002-03, :on 980406,unplanned Actuations of ESF Occurred.Caused by Blown Fuse.Blown Fuses Have Been Replaced (← links)
- 05000321/LER-1989-008-02, :on 890608,determined That Tech Specs for Onsite Emergency Diesel Generator Fuel Did Not Require That Adequate Fuel Inventory Be Maintained Onsite for 7 Days Under Accident Conditions (← links)
- 05000321/LER-1989-005-02, :on 890328,determined That Portion of Contacts Between Sensor & Actuated Device of Lo Lo Set Sys Not Included in Sys Logic Functional Test.Caused by Personnel Error.Test Method Developed (← links)
- 05000321/LER-1989-006-02, :on 890329,HPCI Sys Declared Inoperable When Topaz Statist Inverter,Which Supplies Power to HPCI Flow Control Circuit,Tripped & Could Not Be Reset.Caused by Component Failure.Inverter Replaced (← links)
- 05000321/LER-1989-007-02, :on 890517,recorders Declared Inoperable Since Recorders Found Not to Be Capable of Recording Full Range of Zero to 1E06 R/H as Required by Tech Specs.Caused by Wiring Error by Vendor.Monitors Rewired (← links)
- 05000321/LER-1987-014-01, :on 870808,10 & 13 Main Control Room Environ Control Sys Went Into Pressurization Mode of Operation. Caused by Geiger-Mueller Tube Failures.Equipment Replaced & Recalibr (← links)
- 05000321/LER-1987-013-01, :on 870803,master Feedwater Controller Circuitry Failed Resulting in Decrease in Reactor Feedpumps Flow & Water Level.Caused by Short Circuit of Two Capacitors in Master Feedwater Controller Amplifier (← links)
- 05000321/LER-1987-011-01, :on 870723,vital AC (EIIS Code Ee) Power Lost Resulting in Reactor Scram.Caused by Equipment Failure. Inverter Refurbished,Temporary Cooling to Inverter Rooms Added & Failed Parts Replaced (← links)
- 05000321/LER-1987-009, :on 870427,primary Containment Penetrations Found Leaking in Excess of Leakage Requirements.Caused by Normal Use & Wear.Valves Either Cycled,Repaired,Rebuilt, Replaced or Plugged Until Replacement (← links)
- 05000321/LER-1987-017-01, :on 871008,plant Operations Personnel Noticed Water Dripping from Standby Gas Treatment Sys (SGTS) Filter Train B Drain.Caused by Personnel Errors.Carbon Filter Medium Replaced & SGTS Returned to Operation (← links)
- 05000321/LER-1987-012-01, :on 870707,inboard Primary Containment Isolation Sys Valve Closed on High Ambient Air Temp Signal & Unanticipated Actuation of ESF Occurred.Caused by Low Setpoint Values.Addl Cooling Ducts Installed (← links)
- 05000321/LER-1986-039, :on 861023,blown Fuses Made Control Room Environ Sys Inoperable for Automatic Functions.Cause of Blown Fuses Unknown.Blown Fuses Replaced.Engineering Study Performed.Sys Will Be Modified (← links)
- 05000321/LER-1989-002-01, :on 890205,4 H Grab Sampling & Analyses Not Performed,Per Tech Spec 3.6.G.2.A When Particulate Fission Product Monitor Inoperable.Caused by Personnel Error. Procedures Upgraded & Personnel Counseled (← links)
- 05000321/LER-1987-010-01, :on 870615,during Logic & Valve Operability Testing on RHR Sys,Reactor Water Level Decreased & Reactor Scram & Containment Isolation Sys Isolation Occurred.Caused by Personnel Error.Personnel Counseled (← links)
- 05000321/LER-1987-006-01, :on 870612 & 22,main Control Room Environ Control (Mcrec EIIS Code VI) Sys Went Into Pressurization Mode of Operation on Receipt of High Radiation Field Trip Signal.Caused by Irradiated Outage Equipment (← links)
- 05000321/LER-1989-001-01, :on 890224,isolation of Group 5 Primary Containment Isolation Sys Occurred.Caused by Rapid Filling of Sys Piping When Pump Suction Valve Opened.Procedures Revised (← links)
- 05000321/LER-1987-015-01, :on 870827 & 28,main Control Room Environ Control Sys Actuated on Signal from Refueling Floor Area Radiation Monitor,Resulting in 870827 Pressurization.Caused by Faulty Gm Tube.Tube Replaced (← links)
- 05000321/LER-1998-001-03, :on 980216,MCREC Declared Inoperable Due to Discovery of Bypass Leakage Paths in Filter Trains.Cause Indeterminate.Installed Instruments in Filter Trains 1Z41-D004B & 1Z41-D004A (← links)
- 05000321/LER-1990-021, :on 901015,unit Manually Scrammed Due to High Vibration of Main Turbine (← links)
- 05000321/LER-1986-034, :on 860912,RWCU Sys Isolation Occurred on High Differential Flow.Caused by Leaking Valve Due to Matl Failure.Valve Removed,Repaired & Reinstalled.Rwcu Team Formed to Investigate Problems (← links)
- 05000321/LER-1986-038, :on 860913,RCIC Inboard Primary Containment Isolation Sys Valve Failed to Close During Reactor Cooldown. Caused by Thermally Induced Binding.Valve Verified Operable When Manually Assisted from Backseat (← links)
- 05000321/LER-1986-037, :on 860906,one Half Primary Containment Isolation Sys Group 2 Isolation Occurred.Caused by Blown Fuse & Relay Coil Failure.Relay Coil Replaced & One Half Group 2 Signal Reset (← links)
- 05000321/LER-1986-032, :on 860823,during Demonstration of Operability of LPCI Components,Lpci Injection Valve a Did Not Indicate Fully Closed.Caused by Failure to Correctly Assemble Valve Coupling.Vendor Manual Updated (← links)
- 05000321/LER-1986-036, :on 861020,inadvertent Actuation of Standby Gas Treatment Sys Occurred.Caused by Personnel Error.Personnel Counseled & Need to Perform Detailed Reviews of Electrical Clearances Emphasized (← links)
- 05000321/LER-1987-008-01, :on 870422,reactor Scram & Partial Primary Containment Isolation Sys Group 2 Isolation Occurred.Caused by Procedure Inadequacy.Reactor Water Level Restored & Scram Signal Reset.Procedures Revised (← links)
- 05000321/LER-1987-007-01, :on 870418,isolations on Valve Groups 3 & 4 Occurred.Caused by Surveillance Procedure Not Containing Complete List of Links to Open & Jumpers to Be Installed to Prevent Actuations.Procedure Revised (← links)
- 05000321/LER-1986-003-01, :on 860128,high Drywell Pressure Signal Caused Several ESF Actuations to Occur During Hydrostatic/Pneumatic Test H-64.Caused by Personnel Error.Personnel Counseled & Incident Reviewed (← links)
- 05000321/LER-1986-041, :on 861010,discovered 6-month Surveillance Not Performed on Nine Fire Detectors.Caused by Personnel Error. Surveillance Procedure Developed Emphasizing to Personnel Need to Generate Procedures in Timely Fashion (← links)
- 05000321/LER-1986-031, :on 860728,discovered That Monthly Fire Hose Station safety-related Area Surveillance Not Performed on 860708 as Required.Caused by Personnel Error.Missed Surveillance Performed (← links)
- 05000321/LER-1984-018-01, :on 840824,contract Engineering Personnel Noted That Numerous Fire Barrier Penetration Seals Not Functional. Caused by Deficient Penetration Seals.Installation & Repair of Fire Seals Implemented (← links)
- 05000321/LER-1986-027, :on 860612,drywell Vent Valves 1T48-F319 & F320 Failed to Pressurize During Special Purpose Procedure 42SP-061286-OU-1S Re Local Leak Rate Test.Caused by Damaged T-ring.T-ring Replaced (← links)
- 05000321/LER-1986-025, :on 860522,trip & Isolation of Reactor Bldg & Refueling Floor Ventilation & Closure of Inboard Isolation Valves on Hydrogen/Oxygen Analyzer Occurred.Caused by Blown Fuse Due to Personnel Error.Fuse Replaced (← links)
- 05000321/LER-1986-018, :on 860521,reactor Scrammed on MSIV Not Fall Open Signal Due to Group I Valve Isolation.Caused by Steam Leak Around Packing of Main Steam Line Drain Valve 1N11-F019.Valve Repaired (← links)
- 05000321/LER-1986-040, :on 861005,RWCU Sys Isolated on High Area Temp Signal.Caused by Actual High Air Temps in RWCU Pump Room Due to Tripped Air Handling Unit (AHU) & Leaking Valves.Ahu Reset & Valves Replaced (← links)
- 05000321/LER-1987-002, :on 870115,main Generator & Main Turbine Tripped on Closure of Main Turbine Stop Valves.Caused by Trip of Main Generator Ground Fault Detector Due to Loose Wire.Engineering Analysis Performed (← links)
- 05000321/LER-1987-003, :on 870109,personnel in Procedure Upgrade Program Performed Validation Review of Plant Procedures & Did Not Fully Satisfy All Surveillance Requirements.Caused by Personnel Error.Procedures Modified (← links)
- 05000321/LER-1986-021, :on 860501,full Reactor Protection Sys Logic Actuation Occurred,Causing Scram Discharge Vol Header to Fill.Caused by Broken Molded Bakelite Actuating Lever of Channel Scram Relay.Relay Replaced (← links)
- 05000321/LER-1986-022, :on 860514,RWCU Sys Isolated Due to High Temp Conditions within RWCU HX Pump Room Area.Caused by Personnel Using Original Design Data Instead of Field Operating Conditions to Establish Tech Specs Setpoint (← links)
- 05000321/LER-1987-001, :on 870101,main Turbine Tripped Causing Full Reactor Scram.Caused by Spurious Ground Fault Signal or Spurious Electrical Noise from Welding Operations. Engineering Evaluation Performed (← links)
- 05000321/LER-1985-048, LERs 85-048,85-049 & 85-051 Have Been Canceled (← links)
- 05000321/LER-1986-033, :on 860806,reactor Protection Sys Bus a Lost Because Motor Generator a Set Output Breaker Tripped.Caused by Failure of Motor Generator Set Overvoltage Relay 1C71-K751A.Relay Replaced (← links)
- 05000321/LER-1986-030, :on 860802,main Turbine & Reactor Feedwater Pumps Tripped Due to Feedwater Flow Oscillations.Caused by Opening of Min Flow Bypass Valves Due to Setpoint Error. Procedure Revised & Instruments Calibr (← links)
- 05000321/LER-1987-005-02, :on 870318,one Secondary Containment Ventilation Exhaust Damper Did Not Actuate During Surveillance.Caused by Locking on Air Bleed Off Port Adjusting Screw.Maint Work Orders Generated (← links)
- 05000321/LER-1999-001-04, :on 990412,loss of Scram Valve Air Header Air Pressure & RPS Actuation Were Noted.Caused by Drawing Error. Revised Drawings to Show That Valve 1P52-F501 Provides Air to Scram Valve Air Header.With (← links)
- 05000321/LER-1986-024, :on 860512,4 H Sample of Reactor Water Coolant for Conductivity Measurement Not Obtained Due to Presence of Steam Instead of Water in Sample Line.Caused by Failure of Liquid Sample Panel cooler.W/860611 1tr (← links)
- 05000321/LER-1985-033, :on 851004,control Room Ventilation Sys Isolated.Caused by Spurious Spike on Control Room a Chlorine Monitor 1241-N022A (← links)
- 05000321/LER-1986-002-01, :on 860106,circuitry for 4,160 Volt Auto Bus Transfer Discovered Not Tested According to Tech Spec Requirements.Caused by Misunderstanding of Tech Specs.New Surveillance Guide Written (← links)
- 05000321/LER-1988-014-02, :on 881003,primary Containment Penetration Local Leak Rate Test Failed Due to MSIVs Exceeding Tech Spec Max Leakage Rate.Cause Under Investigation.Corrective Actions Incomplete (← links)
- 05000321/LER-1986-015, :on 860331,isolation of RHR Reactor Shutdown Cooling Suction Inboard Primary Containment Isolation Valve 1E11-F009 Occurred.Caused by Inadequate Procedure.Procedure 57SV-SUV-007-1S Will Be Revised (← links)
- 05000321/LER-1997-007-03, :on 971118,pneumatic Leak Resulted in Closure of Pciv.Caused by N Leak from Pneumatic Manifold on MSIV 1B21-F022B.Repaired Leak & Confirmed That No Similar Leaks Exist on Any Other MSIVs (← links)
- 05000321/LER-1997-008-03, :on 971118,Group 1 Isolation on Low Condenser Vacuum Occurred.Caused by Personnel Error & Less than Adequate Procedure.Counseled Involved Personnel & Revised Procedures 34AB-C71-001-1S & 34AB-C71-001-2S (← links)
- 05000321/LER-1986-013, :on 860305,w/unit in Refueling Mode & During Hydrostatic Test on RWCU Filter/Demineralizer B,Rwcu Sys Isolation Occurred.Cause Undetermined.No Corrective Actions Planned (← links)
- 05000321/LER-1986-026, :on 860605,during Performance of Special Functional Test on Reactor Protection Instruments,Determined That Procedures Did Not Include Step to Perturb Water Level. Caused by Personnel Error.Procedures Under Rev (← links)
- 05000321/LER-1997-006-03, :on 971031,apparent LPRM TIP Calibr Tube Failure Resulted in Primary Sys Pressure Boundary Leakage. Caused by Small Matl or Mfg Flaw in TIP Calibr Tube.Replaced Entire LPRM Assembly (← links)
- 05000321/LER-1986-012, :on 860226,discovered That Thermal Sensor 1C11-N060A Valved Out & Inoperable.Caused by Personnel Error.Isolation Valve for Sensor Opened & Channel Returned to Svc (← links)
- 05000321/LER-1986-023, :on 860515,reactor Scram Occurred While Personnel Returning Main Steam Line Transmitter to Svc. Caused by Procedural Inadequacy.Transmitter Properly Filled, Vented & Placed Into Svc (← links)
- 05000321/LER-1997-005-03, :on 971014,control Rod Partially Withdrawn W/O Pressure in Scram Accumulator,Occurred.Caused by Personnel Error.Individuals Involved Counselled,Out of Svc HCUs Tagged Out & Inoperable HCUs Disabled (← links)
- 05000321/LER-1997-004-03, :on 970715,single Failure Rendered RHRSW Long Term Containment Heat Removal Mode,Inoperable.Caused by Original Design Error.Temporary Mod 1-97-13 Was Implemented to Disarm Circuits (← links)
- 05000321/LER-1986-020, :on 860425,RWCU Sys Inboard & Outboard Primary Containment Isolation Valves 2G31-F001 & 2G31-F004 Isolated on High Leakage Flow Signal.Caused by Disconnected Jumper During Functional Test.Isolation Reset (← links)
- 05000321/LER-1986-016, :on 860404,reactor Protection Sys Logic Actuation Occurred.Caused by Main Steam Line Radiation Monitor Failing Downscale.Monitor Repaired by Adjusting High Voltage Inoperable Trip Setpoint (← links)
- 05000321/LER-1988-007-02, :on 880531,rollup Fire Door 1L48-D143 for 1R43-S001B(1B) Emergency Diesel Generator Room Found Stuck in Mid Position of Downward Travel.Caused by Lack of Administrative Controls.Fire Door Repaired (← links)
- 05000321/LER-1988-010-02, :on 880525,determined That Configuration of Recombiner Bldg Ventilation Radiation Noble Gas Monitors Defeated Annunciation Required by Tech Specs.Caused by Procedure Inadequacy.Procedures Revised (← links)
- 05000321/LER-1988-015-02, :on 881026,informed That Automatic Depressurization Sys Design Was Such That Single Failure (Battery) Could Cause Sys to Be Unable to Perform Safety Function.Caused by Inadequate Design Review (← links)
- 05000321/LER-1988-009-02, :on 880520,reactor Scram Occurred When Three MSIVs Less than 90% Opened.Caused by Procedure Deficiency. Nitrogen to MSIVs Restored,Plant Procedures Temporarily Revised & Permanent Revs Scheduled (← links)
- 05000321/LER-1986-019, :on 860413,revised Core Spray Logic Sys Functional Test Procedure Found Inadequate.Caused by Procedure Possibly Rendering Diesel Generators 1A & C Inoperable.Procedure Revised (← links)
- 05000321/LER-1999-003-01, :on 990507,incorrect Performance of Equipment Clearance Led to Scram on High Reactor Pressure.Caused by Personnel Error.Personnel Disciplined & Improved Procedure.With (← links)
- 05000321/LER-1999-002-01, :on 990429,HPCI Sys Inoperability Occurred. Caused by Vacuum in HPCI Sys Vacuum Tank.Personnel Lowered Tank Vacuum & Successfully Completed HPCI Sys Testing.With (← links)
- 05000321/LER-1986-017, :on 860415,LPCI Outboard Primary Containment Isolation Valve Isolated Causing Shutdown Cooling Capability Loss.Caused by Blown Fuses from Inadvertent Short of Relay Contacts Due to Personnel Error.Valve Reopened (← links)
- 05000321/LER-1988-011-02, :on 880509,determined That Design Deficiency Could Affect Control Room Environ Control Sys.Caused by Design Deficiency Resulting from Single Failure Criteria. Area Radiation Monitors Modified (← links)
- 05000321/LER-1982-021-03, /03X-1:on 820322,drywell/torus Multipoint Recorder 1T47-R612 Found Inoperable.Caused by Component Failure Due to Loose Balancing Unit Coupling.Design Change Initiated to Replace Recorder (← links)
- 05000321/LER-1986-007-01, :on 860331,standby Gas Treatment Filter Train 1A Found Degraded by Wet Downstream Charcoal Absorber Bed. Caused by Personnel Failure to Recognize Potential Leaking Deluge Valve.Charcoal Bed Replaced (← links)
- 05000321/LER-1988-013-02, :on 880904,reactor Feed Pump a Controller Malfunctioned Resulting in Decrease in Reactor Water Level. Caused by Poorly Soldered Connection on Converter Board. Connection Resoldered & Amplifier Replaced (← links)
- 05000321/LER-1988-012-01, :on 880826,HPCI Sys Declared Inoperable Due to Malfunctioning Sys Flow Controller.Caused by Loose Fastener on Intermediate Gear in Gearing Mechanism of Controller. Gear Placed in Gear Train (← links)
- 05000321/LER-1988-005-02, :on 880419,reactor Scram Occurred After Personnel Exchanged Turbine Lubrication Oil Coolers.Caused by Personnel Error.Involved Operations Personnel Counseled & Procedures Revised (← links)
- 05000321/LER-1985-044, :on 851206,during Refueling Shutdown,Isolation of Shutdown Cooling Suction Outboard Containment Isolation Valve Occurred.Caused by Special Purpose Procedure 42SP-DCI-009-15 Deficiency.Procedure Revised (← links)
- 05000321/LER-1986-005, :on 860130,during Refueling Outage,Esf Actuation Occurred.Caused by Reactor Protection Sys a Alternate Power Supply Bus Trip Due to Voltage Fluctuations. Voltage Regulator Will Be Installed (← links)
- 05000321/LER-1988-004-02, :on 880415,RWCU Primary Containment Isolation Sys Valves Closed.Caused by High Cycle Fatigue Failure of 3/4 Inch Drain Line.Drain Line Replaced & Tested & Operation of Transmitter Investigated (← links)
- 05000321/LER-1988-008-02, :on 880817,frequency for Operability Testing of Two HPCI Valves Reported Not in Compliance W/Tech Spec 4.5.D.1.e.Caused by Procedure Deficiency.Procedure 34SV-E41-001-1S Upgraded (← links)
- 05000321/LER-1988-006-02, :on 880809,RWCU Primary Containment Isolation Sys Valves Closed on Isolation Signal Due to Rapidly Degraded Oil.Rwcu Pump Repaired & Suspect Oil Sent for Analysis & Oil in Other Equipment Replaced (← links)
- 05000321/LER-1988-002-01, :on 880410,reactor Protection Sys Actuation Occurred & Outboard Valves of Primary Containment Isolation Sys Valve Group 2 Isolated.Caused by Personnel Error.Event Reviewed W/Involved Personnel (← links)
- 05000321/LER-1986-006, :on 860115,full Reactor Protection Sys Logic Actuation Occurred from Spurious Reactor Low Water Level Instrumentation Signal.Caused by Contract Work in Area. Control Rods in Place Prevented Reactor Scram (← links)
- 05000321/LER-1985-046, :on 851219,at 100% Power,Spurious Initiation of Standby Gas Treatment Trains 1B & 2B Occurred.Cause Undetermined.Trains Shut Down & Returned to Standby Mode (← links)
- 05000321/LER-1985-036-01, :on 851120,reactor Water Cleanup Inboard Isolation Valve Closed in 34 S,Exceeding Max Operating Time of 30 Per Tech Spec Table 3.7-1.Procedure 52-GM-MEL-022-OS Initiated (← links)
- 05000321/LER-1985-045, :on 851129,excess Flow Check Valve 1B21-F051C Failed to Check Flow.Valve Will Be Replaced During Outage & Will Be Functionally Tested During Next Reactor Startup (← links)
- 05000321/LER-1979-073-03, /03L-0:on 790827,water Supply for Control Room Charcoal Filter Fire Protection Deluge Sys Did Not Meet Seismic & Redundancy Requirements.Caused by Low Plant Svc Water Pressure Leading to Trips & Leakage (← links)
- 05000321/LER-1988-003-02, :on 880226,unanticipated Actuation of Reactor Protection Sys Occurred Due to Turbine Trip.Caused by Ground Relay Spuriously Activating.Electrical Equipment Associated W/Generator Excitation Sys Cleaned & Tested (← links)
- 05000321/LER-1979-102-03, /03L-0:on 791226,during Shutdown & While Performing Normal Surveillance,Hpci Steam Line Differential Pressure Switch Found at 241 Inches of Water.Caused by Instrument Drift.Instrument Recalibr (← links)
- 05000321/LER-1987-016-01, :on 871214,main Control Room Environ Control Sys Isolation Occurred Due to False Chlorine Signal.Caused by Surveillance Procedure Inadequacy.Procedure Revised & Chlorine Detector Replaced & Recalibr (← links)
- 05000321/LER-1986-009, :on 860207,standby Gas Treatment (SBGT) Sys Fans for Train a of Units 1 & 2 auto-started.Caused by Blown Fuse in Supply Circuit to LOCA Signal to SBGT Relay C61-K72. Fuse Replaced (← links)
- 05000321/LER-1985-040, :on 851122,while RWCU 1B Demineralizer Being Placed in Svc,Demineralizer Bypass Valve 1G31-F044 Failed to Close & Isolation Valve 1G31-F004 Isolated on High Differential Flow.Caused by Steam Leak (← links)
- 05000321/LER-1985-047, :on 851220,use of GE Silicone Sealant (RTV-102) on Both Drywell Personnel Airlock Doors Prevented Adequate Leak Rate Testing of Door Seals.Caused by Personnel Error. New Seals Installed (← links)
- 05000321/LER-1985-052, :on 851219,main Steam Relief Valve Failed to Lift within Setpoint Tolerance Required by Tech Spec Section 2.2.A.1.Setpoints Met Mfg Tolerance.Cause Not Stated. Proposed Tech Spec Rev Recommended (← links)
- 05000321/LER-1986-011, :on 860213,ESF Actuated W/Unit Shut Down for Refueling.Caused by Nonutility Personnel Error During Temporary Mod.Mod Work Instructions Rewritten to Isolate Transmitters from Trip Units (← links)
- 05000321/LER-1985-024, :on 850617,determined That post-LOCA Radiation Monitoring Sys Recorders Not Being Calibr at Required Interval.Caused by Failure of Personnel to Incorporate Recorders in Surveillance Data Base (← links)
- 05000321/LER-1985-034, :on 851014,plant Personnel Received RWCU Isolation When Pump Inboard & Outboard Isolation Valves Isolated on High Differential.Caused by Intermittent Spiking Flow Transmitter (← links)
- 05000321/LER-1985-039, :on 851117,false High Temp Trip Signal Received Resulting in RWCU Outboard Primary Containment Isolation Valve Isolation & Pump Trip.Caused by False Electrical Signal of Unknown Origin (← links)
- 05000321/LER-1985-031-01, :on 850920,reactor Water Cleanup Valve Isolated & Water Sample Could Not Be Obtained.On 850921,full Reactor Protection Sys Logic Actuation Occurred.Caused by Blown Seal,Sediment Blockage & Pressure Spike (← links)
- 05000321/LER-1997-003-01, :on 970325,RBM Operability Requirements Did Not Match Rod Withdrawal Error Analysis Assumptions Resulting in Disparity Between Core Analysis Design Procedure Assumptions & TS Requirements.Changes to TS Prepared (← links)
- 05000321/LER-1986-002, :on 860106,determined That 4,160-volt Auto Bus Transfer Circuitry Not Tested Per Tech Spec Requirements. Caused by Inadequate Procedure 42SV-R43-00-1-1 Re Alternate Supply Breaker Testing.Procedure Revised (← links)
- 05000321/LER-1985-050, :on 851226,30,860102,07 & 11,reactor Protection Sys Alternate Power Supply Bus Breakers Tripped.Caused by Voltage Sensing Circuitry Responding to Voltage Fluctuations on Bus.Voltage Regulator Installed (← links)
- 05000321/LER-1985-038, :on 851029,ESF Sys Actuated Due to Leak in Cleanup Sludge Discharge Mix Pump 1G11-CO28.Caused by Casing Crack.Sys Reset & Analyzers & Fission Product Monitors Returned to Svc (← links)
- 05000321/LER-1986-001, :on 860101,w/unit Shut Down for Scheduled Refueling Outage,Reactor Water Conductivity Sample Not Taken.Caused by Personnel Error.Other Specified Conductivity Samples Taken & Satisfactorily Analyzed (← links)
- 05000321/LER-1985-010-01, :on 850116,reactor Scram on Low Level Water Signal Received.Caused by Ac Power Supply Trip & Runback of Feedpumps a & B.Personnel Restored Level to Normal Via Feedpump a & Booster Pumps (← links)
- 05000321/LER-1985-037, :on 851024,high Chlorine Concentration Alarm Received,Followed by Main Control Room Environ Isolation. Caused by Chlorine Monitor Printed Circuit Board Relay Closing Momentarily (← links)
- 05000321/LER-1985-042, :on 851121,personnel Determined That Alarm Setpoints for Noble Gas Effluent Monitors Not Calculated as Required by Tech Spec Sections 3.14.2 & 3.3.6.10.Caused by Personnel Error (← links)
- 05000321/LER-1997-002-01, :on 970207,determined TS Surveillance Requirement 3.8.1.9 Had Not Been Adequately Implemented. Caused by Less than Adequate Procedures in Logic Sys Functional Test.Operating Order Issued (← links)
- 05000321/LER-1985-035, :on 851016,HPCI Turbine Isolated Due to High Exhaust Diaphragm Pressure.Caused by Leaking Inboard Ruptured Diaphragm.Inboard & Outboard Diaphragms Replaced (← links)
- 05000321/LER-1996-014, :on 961106,incorrect Circuit Breaker Setting Resulted in Inoperable Edg.Caused by Failure to Incorporate Design Info Into Appropriate Plant Single Line Electrical Drawing.Temporary Plant Mod Will Be Installed (← links)
- 05000321/LER-1997-001-01, :on 970129,pressure Boundary Leakage Results in Condition Prohibited by Tss.Cause of Event Cannot Be Determined Conclusively.Maint Personnel Repaired Line.W/ (← links)
- 05000321/LER-1985-028, :on 850729,determined That Procedures Re Operability of Gaseous Radwaste Sys & Differential Pressure Instrumentation Channel Check Do Not Meet Requirements of Tech Specs.Caused by Personnel Error (← links)
- 05000321/LER-1996-013, :on 961022,personnel Error Resulted in Missed TS Surveillances.Personnel Made Aware of Error & Consequences (← links)
- 05000321/LER-1985-027, :on 850724,reactor Scram Occurred at 98% Power.Caused by Inboard MSIV a (B21-F022A) Drifting Closed Due to Improper Backseating of Msiv.Inboard MSIV a Rebuilt & Stem Replaced (← links)
- 05000321/LER-1985-029, :on 850806,instruments Could Not Detect or Measure Noble Gas During Monitoring Procedure.On 850815, Preplanned Alternate Method Failed to Follow Tech Specs. Caused by Design & Nonlicensed Staff Error (← links)
- 05000321/LER-1985-032, :on 850918,quarterly Surveillance Test for Drywell Main Exhaust Inboard Isolation Valve T48-F319 Not Performed Per Tech Specs.Caused by Personnel Error.Limiting Condition for Operation Initiated (← links)
- 05000321/LER-1985-026-01, :on 850627,reactor Scrammed.Caused by Nonlicensed Personnel Closing Incorrect Fire Valve Chamber Resulting in phase-to-ground Fault Trip on Transformer. Valves Labeled & Nozzle Realigned (← links)
- 05000321/LER-1996-015, :on 961119,automatic Primary Containment Isolation Sys Actuation Occurred.Caused by Failed Control Relay.Replaced Fuse 1A71B-F21 & Coil of Relay 1A71B-K56 & Evaluated Other Relays for Replacement (← links)
- 05000321/LER-1985-030, :on 850827,during Preparation for Maint on Emergency Diesel Generator A,Generator C Inadvertently Started.Caused by Unlicensed Personnel Entering Wrong Diesel Room.Diesel Preventive Maint Procedure Revised (← links)
- 05000321/LER-1984-025, :on 841215,linear through-wall Crack Approx 2 3/4 Inches Long Discovered in Weld 1T48-2CPI-18-P1D-6. Caused by Thermally Induced Stress.Crack Ground Out,Weld Repaired & Addl Welds Inspected (← links)
- 05000321/LER-1983-039-03, /03L-0:on 830322,Group II Isolation Received, Tripping Drywell to Torus Differential Pressure Compressions T48-C001A & B.Caused by Failure of Protective Relay Power Fuse.Fuse Replaced (← links)
- 05000321/LER-1985-024-01, :on 850617,determined That post-LOCA Radiation Monitoring Sys Recorders Were Not Being Calibr Once Every 6 Months.Caused by Personnel Error.Recorders Added in Plant Surveillance Data Base (← links)
- 05000321/LER-1996-012, :on 961008,ground on 600-volt Bus Causes Loss of RPS Power Supply & Unplanned ESF Sys Actuations.Caused by nonfault-tolerant Design.Cable & Heater Replaced & Use of Breaker Trip Devices Investigated (← links)
- 05000321/LER-1985-017, :on 850515,determined Cable Tray Support 33 Located in Cable Spreading Room Could Experience Overloading During OBE or Sse.Caused by A/E Design Error.Cable Support Modified.Part 21 Related (← links)
- 05000321/LER-1985-011-01, :on 850424,Train a of Standby Gas Treatment Sys Started.Caused by Inadequate Special Instructions Which Failed to Give Detailed Instructions for Returning Battery Charger to Svc.Train a Returned to Normal (← links)
- 05000321/LER-1985-023-01, :on 850616,reactor Water Conductivity Monitoring Inoperable Due to Conductivity Cell.Caused by Broken Gauge Which Had Been Removed on 850614.Reactor Water Conductivity Cell Reestablished (← links)
- 05000321/LER-1985-021, :on 850612,plant Personnel Determined That Fire Protection Valve Cycling Procedures Could Make Valves Inaccessible During Operations to Be Cycled Once Every 18 Months Rather than Every 12 Months (← links)
- 05000321/LER-1985-025-01, :on 850618,full Reactor Protection Sys Logic Actuation Occurred on All Four Rod Groups Due to Filling of Scram Discharge Vol.Cause Unknown.Rod Group Lights to Be Installed (← links)
- 05000321/LER-1985-020, :on 850415,special Purpose Procedure Directing Implementation of Direct Conversion Reactor on Plant Standby Gas Treatment Sys in Violation of Tech Specs.Caused by Inadequate Technical Review of Procedures (← links)
- 05000321/LER-1985-022, :on 850527,operations Personnel Determined That Reactor Water Cleanup Pump Suction Inboard Primary Containment Isolation Valve Isolated on High Ambient Temp in Reactor Water Cleanup Pump Room 1A (← links)
- 05000321/LER-1985-018, :on 850515,safety Relief Valve a Activated & Remained Open & Reactor Manually Scrammed.Caused by Falling Water from Control HVAC Creating Excessive Moisture in Panel 1H11-P926.HVAC Filter Train Maint Done (← links)
- 05000321/LER-1992-013, :on 920521,single Failure Vulnerability Discovered in Intake Structure Ventilation Sys.Caused by Less than Adequate Design.Changes Made to Operating Mode Sys & Ventilation Louvers Blocked Open (← links)
- 05000321/LER-1985-016-01, :on 850519,RCIC Pump Failed to Meet Rated Flow Requirement of 400 Gpm at Normal Reactor Vessel Operating Pressure.Caused by Failure of RCIC Sys Automatic Control Amplified Circuit Board.Circuit Board Replaced (← links)
- 05000321/LER-1981-038-03, /03L-0:on 810424,local Leak Rate Test Coordinator Reviewed 810423 Test Results & Determined That Valve G11-F019 Was Leaking Excessively.Cause Unknown.Valve Will Be Repaired & Retested.Investigation Underway (← links)
- 05000321/LER-1992-023, :on 920827,unit Scrammed & Group 1 Primary Containment Isolation Sys Valves Closed on Main Steam Line Radiation Signal.Caused by Organic Intrusion & Less than Adequate Procedure.Procedure Revised (← links)
- 05000321/LER-1980-035-03, /03L-0:on 800407,during Control Room Isolation Pressurization Lsft,Control Room Filter for 1241-C012A Tripped After Being auto-started.High Chlorine Isolation Trip Simulated.Caused by Flow Switch Out of Calibr (← links)
- 05000321/LER-1980-026-03, /03L-0:on 800218,during Steady State Power,Head Observed During Routine ISI Testing Exceeded Upper Limit in ASME Section Ii.Exact Cause for Pump Performance Better than Previous Date Unknown.New Pump Curve Generated (← links)
- 05000321/LER-1980-022-03, /03L-0:on 800222,w/reactor in Cold Shutdown,Lack of Electronic Annunciation Discovered on 122-ft Elevation West Cable Way Door C19.Caused by 800123 Security Re Audit Securing Door.Door C19 Was Annunciated on 800131 (← links)
- 05000321/LER-1980-021-03, /03L-0:on 800221,during Steady State Operation, Secondary Containment Integrity Momentarily Violated at 130- Ft Elevation Reactor Bldg to Control Bldg Airlock.Caused by Design Deficiency.Design Change Request Has Been Writte (← links)
- 05000321/LER-1979-105-01, /01T-0:on 791228,during Insp of Torus Internals, Brace Between Legs of Vent Line Downcomer Near Main Steam Relief Valve Discharge Line Was Found Missing.Braces Modified (← links)
- 05000321/LER-1979-054-06, /06T-0 on 790802:during Monthly Inventory of Onsite Snm,Discovered Three Detectors Had Been Mistakenly Shipped Off Site for Disposal W/O Authorization.Caused by Improper Tagging.Procedure Changes Submitted (← links)
- 05000321/LER-1979-056-01, /01T-0 on 790803:during Performance of Hanger Rework Project,Discovered Section of Piping Crossfied Not Supported Per Seismic Class I Requirements.Caused by Design Error.Piping Upgraded (← links)
- 05000321/LER-1979-051-03, /03L-0 on 790726:during Cold Shutdown,While Performing Design Change Request 78-201,control Power Cables to E11-F008 Valve Were Disconnected & Cut W/Valve in Open Position.Caused by Personnel Error.Valve Reconnected (← links)
- 05000321/LER-1992-021, :on 920827,unit Scrammed & Group 1 Primary Containment Isolation Sys Valves Closed,Resulting in Initiation of Sgts,Hpci & RCIC Sys.Caused by Organic Instrusion.Filter Elements Replaced (← links)
- 05000321/LER-1992-022, :on 920827,Train a of Standby Gas Treatment Sys Received Automatic Initiation Signal But No Equipment Actuations Occurred.Cause Not Determined.Fission Product Monitoring Sys Returned to Svc (← links)
- 05000321/LER-1996-007, :on 960424,failed Component Results in Inadvertent EDG Start.Caused by Relay Momentarily Binding in Actuated Position.Relay Replaced & Surveillance Completed (← links)
- 05000321/LER-1996-006, :on 960421,withdrawal of Inoperable Control Rod Occurred.Caused by Inadequate Procedure & Lack of Work Coordination.Procedure 3460-OPS-066-05 Revised & TSs Associated W/Event Explained (← links)
- 05000321/LER-1996-005, :on 960414,supply Breaker for 4160V/600V Station Svc Transformer 1D Opened de-energizing 600V Bus 1R23-S004.Caused by Personnel Error.Personnel Involved Counseled (← links)
- 05000321/LER-1985-019, :on 850403 & 05,reactor Water Cleanup (RWCU) Sys Pump Suction Primary Containment Valves 1G31-F001 & 1G31-F004 Isolated Three Times.Caused by High Ambient Temp in RWCU Pump Rooms 1A & 1B (← links)
- 05000321/LER-1996-011, :on 960719,periodic Valve Position Check Required by Unit TS SR Had Not Been Performed.Caused by Inadequate Procedures.Procedures Revised to Include Periodic Position Check (← links)
- 05000321/LER-1985-012, :on 850324,reactor Water Cleanup Primary Containment Isolation Valves Closed Due to Leak Detection Isolation Signal.Manual Isolation Valves Replaced (← links)
- 05000321/LER-1992-025, :on 920930,setpoint Drift in Protective Relay Results in Multiple Actuations of Esf.Caused by One RPS Bus Power Supply Overvoltage Relay.Overvoltage Relay Recalibrated & Sys Return to Normal (← links)
- 05000321/LER-1992-024, :on 920930,unit Manually Scrammed Due to High Turbine Vibration.Caused by Component Failure.Pressure Switch Replaced & Design Change Will Be Implemented (← links)
- 05000321/LER-1996-010, :on 960629,failure of Turbine Overspeed Control Valve Occurred.Caused by Failed Hydraulic Actuator Diaphragm.Replaced Failed Diaphragm & HPCI Control Valve Diaphragm (← links)
- 05000321/LER-1984-025-01, :on 841215,linear through-wall Crack Discovered in Weld 1T48-2CPI-18-P1D-6.Cause Under Investigation.Crack Ground Out.Weld Repaired & Satisfactorily Inspected.W/ (← links)
- 05000321/LER-1984-020-01, :on 841216,Group 2 Isolation Occurred for No Apparent Reason.Two Other Group 2 Isolations Occurred on 841219 & 28.Caused by Normal Grid Voltage Swings (← links)
- 05000321/LER-1984-005, :on 840720,personnel Discovered Numerous Cable Leads Lifted & Not Properly Tagged in Control Room.Caused by Personnel Error & Inadequate Administrative Controls. Procedures Revised (← links)
- 05000321/LER-1992-018, :on 920704,unplanned Automatic Actuations of ESF Occurred.Cause Undetermined.Trip Contacts Bypassed Temporarily While Installing Monitoring Equipment on Power Supply (← links)
- 05000321/LER-1992-003, :on 920121,air-operated Cooling Water Supply Valves to Emergency Equipment Room Coolers Failed to Open Automatically.Caused by Failure of solenoid-operated Valves. Air Supply to Valves Disconnected (← links)
- 05000321/LER-1992-020, :on 920710,main CR Environ Control Sys Automatically Transferred to Pressurization Mode When CR Air Intake Radiation Monitor Tripped.Caused by Instrument Setpoint Drift.Trip Setpoint Adjusted (← links)
- 05000321/LER-1984-019, :on 841011,outer Clamp Missing on Seismic Restraint for RHR Svc Water Pump B (E11-COO1B).Caused by Inadequate Const/Installation.Outer Clamp Replaced During Pump Reassembly (← links)
- 05000321/LER-1996-009, :on 960526,reactor Feed Pumps Automatically Tripped.Caused by Component Failure.Failed Circuit Board Replaced (← links)
- 05000321/LER-1985-013, :on 850216,drywell Floor Drain Total Leakage Exceeded Max Limit.Caused by Shaft Seal 1 on Reactor Recirculation Pump B Leaking Excessively.Shaft Seal Cartridge Replaced (← links)
- 05000321/LER-1996-008, :on 960430,reactor Pressure Increase Resulted in Automatic Reactor Shutdown.Caused by Inadequate Procedure.Procedures Revised (← links)
- 05000321/LER-1981-052-03, /03X-1:on 810621,LPCI Inverter B R44-S003 Tripped, Resulting in Loss of Power to Suction & Discharge Valves & LPCI Injection Valve.Caused by Defective Thermal Temp Switch in Inverter Leg.Switch Replaced (← links)
- 05000321/LER-1984-012, :on 841114,20 & 1206,reactor Protection Sys Logic Actuation Occurred for No Apparent Reason.Caused by Blown Fuse & Lifted Wire.Fuse in Panel 1H11-P610 & Wire Replaced (← links)
- 05000321/LER-1984-026-01, :on 841210,full Reactor Scram Signal on Low Reactor Water Level Occurred in Main Control Room.Caused by Root Valves Being Opened to Reactor Water Level Transmitters 1B21-NO80 A-D.Scram Signal Reset (← links)
- 05000321/LER-1984-017-01, :on 841008,primary Containment Valves & Penetration Discovered Leaking in Excess of Specified Limits.Cause Undetermined.Valves Will Be Repaired Prior to Startup (← links)
- 05000321/LER-1985-009, :on 850123,clearance Hold Tags Placed on Wrong Switches,Resulting in Inability of Ball Valves to Close. Caused by Personnel Error.Responsible Personnel Counseled. Tags Placed on Correct Switches (← links)
- 05000321/LER-1985-005, :on 850123,plant Shut Down.Caused by Exhaust Diaphragm of HPCI Rupturing Due to Defective Seal on Exhaust Line.Diaphragm Replaced.Leak Rate Test Performed Satisfactorily (← links)
- 05000321/LER-1984-016-01, :on 840929,reactor Protection Sys Logic Actuation Occurred from Erratic Reactor Water Level a Instruments 1B21-N017A & B.Caused by Air Trapped in Instrument Lines.Variable Leg Backfilled (← links)
- 05000321/LER-1981-035-03, /03X-1:on 810426,standby Svc Water Sys Would Not Deliver Rated Flow.Caused by Svc Water Isolation Valve 1P41-F402A Not Opening.Valve Repaired & Successfully Retested (← links)
- 05000321/LER-1996-004, :on 960323,reactor Pressure Increased & Reactor Automatically Shut Down.Caused by Inadequate Sys Operating Procedure 34SO-N30-001-1S, Main Turbine Operation. Procedures 34SO-N30-001-1S & -2S Revised (← links)
- 05000321/LER-1985-010, :on 850116,reactor Scrammed on Reactor Vessel Low Water Level Signal.Caused by Vital Ac Power Supply Trip. Personnel Restored Reactor Level to Normal (← links)
- 05000321/LER-1985-002, :on 850113,safety Relief Valve B Failed to Open.Caused by Open Links.Links Closed (← links)
- 05000321/LER-1984-017, :on 841008,during Performance of Procedure HNP-1-3952,numerous Primary Containment Isolation Valves Exceeded Tech Spec Limits.Caused by Equipment Wear.Valves Repaired,Tested & Returned to Svc (← links)
- 05000321/LER-1984-014-01, :on 841011,unit Shut Down Due to IGSCC of Recirculation Piping & Rhr.Caused by Possible Fabrication &/Or Const Inadequacies.Engineering & Safety Consequence Being Assessed (← links)
- 05000321/LER-1985-007, :on 850109,Tech Spec Requirements for New Setpoint for HPCI Low Steam Line Pressure Instrument Not Met.Caused by Loss of Administrative Controls.Instrument Recalibr (← links)
- 05000321/LER-1985-008, :on 850109,electrical Overspeed Trip Did Not Actuate within Specified Limits of Tech Specs.Electrical Overspeed Repaired.On 850111,RCIC Isolated.Caused by High Exhaust Diaphragm Pressure.Diaphragm Replaced (← links)
- 05000321/LER-1985-003-01, :on 850106,reactor Protection Sys Logic Actuation Occurred During Completion of Maint Activities on Reactor Low Water Level Instrument 1B21-N080A,due to Backfilling 1B21-N080A Before Return to Svc (← links)
- 05000321/LER-1984-029-01, :on 841224 & 25,reactor Water Cleanup Isolation Valve 1G31-F004 Isolated on High Differential Flow.On 841225,reactor Protection Sys Motor Generator B Tripped. Caused by Air in Instrument Lines (← links)
- 05000321/LER-1992-017, :on 920626,determined That Requirements of Unit 1 TS Table 3.2-8,item 3 Not Being Met.Caused by Less than Adequate Procedures.Wiring Changes Will Be Implemented & Procedure 57SV-D11-007-2S Will Be Revised (← links)
- 05000321/LER-1985-001, :on 850105,reactor Water Cleanup Sys Automatically Isolated Due to High Differential Flow Trip Signal.Caused by Air Trapped in Sensing Lines of Sys Inlet Flow Transmitter G31-N036 (← links)
- 05000321/LER-1992-016, :on 920616,blown Fuse Resulted in Unplanned Engineered Safety Feature Sys Actuations.Fuse Replaced (← links)
- 05000321/LER-1996-003, :on 960309,PCIS Valves Closed Unexpectedly & Isolated Reactor Coolant Leakage Detection Sys.Caused by Component Failure.Logic Power Fuse & Relay Coil Replaced & Group 2 Isolation Signal Reset (← links)
- 05000321/LER-1992-015, :on 920610,PCIS Valve Automatically Closed, Resulting in Trip of Operating RWCU Sys Pump.Caused by Faulty Temp Switch.Cracked Temp Switch Replaced (← links)
- 05000321/LER-1984-014, :on 841011,cracking Found in RCS Pressure Boundary.Caused by IGSCC in 21 of 22 Welds.Five Welds Found Acceptable.Remaining 17 Welds Will Be Repaired Via Weld Overlay (← links)
- 05000321/LER-1996-002, :on 960223,secondary Containment Doors & Hatches Missed TS Surveillance.Caused by Personnel Error. C/A:Individual Placed on Gpc Positive Discipline Program (← links)
- 05000321/LER-1984-027-01, :on 841117,diesel Generator 1B Declared Inoperable Because Lube Oil Temp Dropped Below 105 F,Causing Three Diesel Generators to Be Inoperable Simultaneously.W/ (← links)
- 05000321/LER-1984-012-01, :on 841114 & 20,reactor Protective Sys Logic Actuations Occurred for No Apparent Reason.Further Investigation Revealed No Cause (← links)
- 05000321/LER-1984-022-01, :on 841112,contract Personnel Accidently Shorted Ground Wires for Contacts 5 & 6 of Initial Fuel Load Trip Relay C71-K13B,causing Fuses C71-F15A & B to Open.Personnel Counseled (← links)
- 05000321/LER-1992-005, :on 920217,600-volt Power Supply Breaker to Reactor Protection Sys Bus a Tripped,Resulting in Loss of Power to Process Radiation Monitors.Cause Not Determined. Power Supply Breakers Closed & Bus Restored (← links)
- 05000321/LER-1984-023-01, :on 841106 & 07,personnel Accidentally Shorted Power Wire to Ground,Resulting in Unplanned Automatic Actuation & Logic Actuation of Esf.Personnel Counseled (← links)
- 05000321/LER-1984-024-01, :on 841025,six Safety Relief Valves Failed to Lift within Plus/Minus 1% Tolerance Range Required by Tech Specs.Caused by Corrosion & Removal of Pilot Assembly Bolts by Personnel.Valves Refurbished (← links)
- 05000321/LER-1984-019-01, :on 841011,outer Clamp on Seismic Restraint for RHR Svc Water Pump E11-C001B Discovered Missing.Caused by Inadequate Const/Installation.Clamp Will Be Replaced During Pump Reassembly (← links)
- 05000321/LER-1992-019, :on 920706,personnel Error Results in Missed TS Surveillance.Responsible Individual Counseled (← links)
- 05000321/LER-1984-021-01, :on 841019,half Scram Occurred in Channel a Due to Wire Shorted to Live Circuit in Panel H11-P609.Caused by Personnel Error.Scram Condition Cleared.Personnel Counseled to Use Caution While Working (← links)
- 05000321/LER-1985-004-01, :on 850130,reactor Bldg & Refueling Floor Standby Gas Treatment Sys Supply Dampers Control Logic Determined to Fail Closed on Loss of Electrical Power.Design Change Requested (← links)
- 05000321/LER-1985-006-01, :on 850130 & 0202,reactor Tripped When Main Transformer 3 Phase Main Generator Output Line Fell.Caused by Incorrect Tensile Strength of Insulators Holding Power Line.New Insulators Installed (← links)
- 05000321/LER-1985-014, :on 850128,instrumentation & Controls Personnel Discovered That RCIC Pump Suction Pressure Instrument Procedure Not Performed Until 850204.Caused by Personnel Error.Personnel Reinstructed (← links)
- 05000321/LER-1979-007-03, /03L-0 on 790120:reactor Core Isolation Cooling Min Flow Valve (E51-F019) Failed to Close Automatically. Caused by Failure of Open Limit Switch,Resulting in Damage to Valve Operator & Torque Switch (← links)
- 05000321/LER-1979-010-03, /03L-0 on 790124:during Normal pre-conditional Ramp,Determined That a Reactor Coolant Chemistry Sample Could Not Be Obtained.Caused by Both Reactor Water Cleanup Pumps Being Inoperable & Primary Sample Line Clogged (← links)
- 05000321/LER-1984-010, :on 840820 & 22,reactor Water Cleanup (RWCU) Inboard Isolation Valve G31-F001 Closed.Caused by High Ambient RWCU Temp Trip Signal.Room Temp Reduced.Valve Returned to Svc (← links)
- 05000321/LER-1995-005-01, :on 950829,ground on 600-volt Affected HPCI & Rps.Isolated Electrical Ground,Repaired Grounded Component & Moved Power Source of Freight Elevator (← links)
- 05000321/LER-1996-001, :on 960104,clogged Servovalve Strainers Resulted in Turbine Control Valve Closure & Automatic Reactor Shutdown.All Servovalves Strainers Replaced (← links)
- 05000321/LER-1992-014, :on 920522,reactor Scram on Turbine Stop Valve Closure Occurred Due to Turbine Stop Valves Unexpectedly Closing.Caused by Mfg Error.Ehc Sys Filter Replaced W/ Correct Type & Reservoir Filled W/New Fluid (← links)
- 05000321/LER-1992-012, :on 920517,output Breakers for B RPS Tripped & Caused Loss of Power to B Rps,Prms,Pcis & Other Systems. Cause of Event Not Determined.Protective Relay Circuitry Functionally Tested & Calibrated (← links)
- 05000321/LER-1992-011, :on 920507,control Switch for EFCV 1B21-F051C Found in Open Position,Rendering EFCV Inoperable.Caused by Inadequate Procedure.Clearance Tags Placed on Control Switches for EFCVs & Procedure Revised (← links)
- 05000321/LER-1992-010, :on 920423,output Breakers for RPS Motor Generator Set Tripped,Causing Loss of Power to B Side of RPS & Process Radiation Monitors.Caused by Failure of Coil in Motor Starter.Starter Replaced (← links)
- 05000321/LER-1984-015, :on 840803,reactor Scram Received on Turbine Control Valve Fast Closure Subsequent to Generator Load Rejection.Caused by Component Failure.Safety Relief Valve a Top Works Will Be Replaced (← links)
- 05000321/LER-1984-013, :on 840729,during Procedure HNP-1-3154,HPCI Malfunctioned & Injected Into Reactor.Caused by Short Circuit Across 1/2 of HPCI Automatic Injection Logic.Hpci Test Jack E41-J1 Inspected & Cleaned (← links)
- 05000321/LER-1991-009, :on 910712,determined That Air Conditioning Subsystem of Main Control Room Environ Control Sys Could Not Sustain Single Failure to Class 1E Power Supply.Caused by Less than Adequate Design.Design Changed (← links)
- 05000321/LER-1992-009, :on 920328,reactor Water Level Decreased.Caused by Personnel Error & Inadequate Procedure 34SO-R23-0041S, Hot Transfer of 600 Vac Sys. Appropriate Procedure Revised & Personnel Was Counseled (← links)
- 05000321/LER-1984-005-01, :on 840629,cable Leads Lifted & Improperly Tagged & Separated in Control Room.Caused by Personnel Error.Procedure HNP-6921 Re Cable & Cable Ways Installation Revised to Strengthen Administrative Control (← links)
- 05000321/LER-1992-008, :on 920324,discovered That Weekly Representative Sample of Particulates in Main Stack Effluent Not Collected.Caused by Personnel Error.Technician Counseled & Standing Order Issued (← links)
- 05000321/LER-1992-006, :on 920226,HPCI Sys Declared Inoperable Due to Failure to Achieve Stable Flow & Pressure at Rated Conditions.Caused by Inadequate Maint Procedures.Flow Control Sys Adjusted to Increase Stability (← links)
- 05000321/LER-1984-007, :on 840604,following Turbine Load Reduction, Turbine Stop Valve Fast Closure Reactor Scram Received. Caused by Disc Pump Not Completely Seating on Main Turbine 2.Instrumentation Recalibr (← links)
- 05000321/LER-1984-006, :on 840311,while Operating Personnel Were Reducing Reactor Power,Control Rod 50-31 Found to Be Three Position Notches Away from Control Rod 02-23.Reactor Manually Scrammed (← links)
- 05000321/LER-1992-001-01, :on 920113,area Radiation Monitor Tripped, Resulting in Main Control Room Environ Control Sys to Transfer to Pressurization Mode.Caused by Drift in 24-volt Dc Module.Power Supply Replaced (← links)
- 05000321/LER-1992-002, :on 920115,discovered That procedure-required Instrument Checks on Suppression Chamber Water Temp,Temp Recorders Not Performed Once Per Shift.Caused by Personnel Error.Procedure Revised & Personnel Counseled (← links)
- 05000321/LER-1984-003-01, :on 840508,fuel Rod F1 Determined to Be in bowed-to-contact Condition Outside Gap Criterion Calculate Design Mcpr.Caused by Crud Induced Localized Corrosion.Fuel Bundle Not Returned to Svc in Reactor (← links)
- 05000321/LER-1991-032, :on 911228,missed TS Required Surveillance Noted.Caused by Personnel Error.Personnel Counseled & Training Will Be Given to Operations Shifts Re Event (← links)
- 05000321/LER-1991-033, :on 911230,HPCI Declared Inoperable.Caused by Intermittent Failure of Transfer Relays in Flow Control Unit.Tranfer Relays Replaced in Flow Control Unit (← links)
- 05000321/LER-1992-007, :on 920316,HPCI Sys Isolation Annunicator Alarmed in Main Control Room,Resulting in Automatic Closure of Valve 1E41-F002.Caused by Technician Bumping Actuating Arm of Relay.Individual Counseled & Trained (← links)
- 05000321/LER-1984-008, :on 840430,surveillance Coordinator Informed of Apparent Anomaly Re Due Date on Standby Gas Treatment Sys Ventilation & Valve Operability Procedure HNP-2-3655.Caused by Computer Programming Error (← links)
- 05000321/LER-1991-018-01, :on 910917,unanticipated Actuation of ESF Occurred.Caused by Personnel Error.Technician Counseled & Conducted Functional Test Involved Instrumentation to Ensure Operability (← links)
- 05000321/LER-1991-009-01, :on 910712,main Control Room Environ Control Sys Discovered Not to Comply W/Single Failure Design Criterion.Caused by Inadequate Design of Sys.Design Changes to Sys Being Implemented (← links)
- 05000321/LER-1984-011-01, :on 840620,following Repair of Valve 1E41-F001, HPCI Turbine Isolated During Testing.Caused by Emulsification of HPCI Turbine Lubricating Oil & Broken Ball on Tappet.Hpci Repaired & Returned to Svc (← links)
- 05000321/LER-1984-009, :on 840609,following Cold Shutdown,Reactor Mode Switch Placed in Startup Position.Operating Personnel Determined APRM 15% Flux Scram Test Not Performed within 24 H of Startup (← links)
- 05000321/LER-1992-004, :on 920201,unplanned ESF Actuation Occurred. Caused by Component Failure.Failed Relay Replaced & Functionally Testing of Isolation Logic Effected by Relay Completed (← links)
- 05000321/LER-1984-002-01, :on 840224,while Preparing to Close Out Design Change Request,Records for Previous Local Leak Rate Test on Loop a Core Spray Min Flow Valve 1E21-F031A Not Available. Leak Test Failed.Valve Replaced (← links)
- 05000321/LER-1984-001-01, :on 840211,reactor Scram Followed High Vibration Turbine Trip.Caused by Bucket & Finger Damage to Both 13th Stages of Low Pressure Turbine A.Stage 13 Will Be Replaced at Later Date (← links)
- 05000321/LER-1995-006, :on 950711,HPCI Was Inoperable Due to Bound Steam Supply Isolation Valve.Installed Spacer Ring in Packing Gland,Replaced Valve Stem,Repaired Valve Bonnet & Returned HPCI Sys to Svc (← links)
- 05000321/LER-1991-030, :on 911202,area Radiation Monitors Tripped on False High Radiation Signals.Caused by Instrument Setpoint Drift.Sys Returned to Normal Mode of Operation & Setpoint Adjusted (← links)
- 05000321/LER-1991-031, :on 911204,ESF Actuation Occurred.Caused by Inadequate Procedure.Procedure Will Not Be Used Again.W/ (← links)
- 05000321/LER-1991-014, :on 910810,reactor Protection Sys Bus B Tripped When Overvoltage Relay Failed.Caused by Component Failure. Failed Component Replaced,Operating Order Issued & Design Review Performed (← links)
- 05000321/LER-1991-028, :on 911116,main Control Room Environ Control Sys Transferred to Pressurization Mode,Resulting in ESFAS Actuation.Caused by Personnel Error.Operator Counseled Re Lack of Attention to Detail (← links)
- 05000321/LER-1995-004-01, :on 950618,RPS Bus B Power Supply Tripped. Cause Has Not Been Determined.Testing & Analysis Continuing in Attempt to Isolate Cause.Voltage Regulator Involved Sent to Mfg for Analysis (← links)
- 05000321/LER-1991-026, :on 911106,full Reactor Scram Signal Occurred. Caused by Lack of Adequate Controls Governing Position of Panel Shutoff Valve PV6 During Venting Process.Licensed Operations Personnel Reset Scram & Restored (← links)
- 05000321/LER-1991-027, :on 911108,RWCU Leak Detection Sys Annunicator Alarm Received,Followed by Automatic Closure of Group 5 Primary Containment Isolation Valves.Caused by Improper Installation of Sensing Lines.Lines Examined (← links)
- 05000321/LER-1991-025, :on 911024,determined Tech Spec Surveillance Program Did Not Include Testing of Automatic Safety Function of Mcrecs Isolation Damper 1Z41-FO18B.Caused by Inadequate procedures.W/911122 1tr (← links)
- 05000321/LER-1991-023, :on 911014,reactor Cavity Flooded & Train B of Standby Gas Treatment Sys Started But Sys Could Not Be Tripped.Caused by Blow Fuse in Control Room Panel.Fuse Replaced & Sys Secured (← links)
- 05000321/LER-1991-024, :on 911016,determined That Procedure Re Surveillance Checks of Torus Oxygen Concentration Not Performed Once Per Day.Caused by Misinterpretation of Ts. Procedure Revised to Require Daily Check (← links)
- 05000321/LER-1991-022, :on 911009,setpoint Drift Discovered in 11 Main Steam Sys Safety Relief Valves.Caused by Corrosion Induced Bonding of Pilot Valve Disc & Seat.Valves Refurbished to Correct Lift Pressures (← links)
- 05000321/LER-1991-021, :on 911007,five Ampere Fuse Blew in RPS Bus B Equipment Protection Panel.Caused by Personnel Error. Personnel Involved Were Counseled Re Event.Monthly Meeting Re Event to Be Established by 911130 (← links)
- 05000321/LER-1991-019-01, :on 910920,RWCU Leak Detection Alarm Actuated,Indicating High Differential Flow in RWCU Sys. Caused by Two Leaking Valves in RWCU Sys.Proper Operation of Flow Transmitter Verified & Valves Repaired (← links)
- 05000321/LER-1995-003-01, :on 950515,trip of Reactor Protection Sys Bus Power Supply Resulted in Actuation of Engineered Safety Features.Calibr Protective Relays in Affected Panel (← links)
- 05000321/LER-1991-013, :on 910809,generator Field Ground Detecting Relay Actuated,Causing Main Turbine Trip & Reactor Scram on Turbine Stop Valve Closure.Caused by Short Duration Ground. Generator Tested & Relay Replaced (← links)
- 05000321/LER-1991-017-01, :on 910911,reactor Feedwater Pumps & Main Turbine Tripped on False High Reactor Water Level Signal, Resulting in Reactor Scram.Caused by Personnel Error.Health Physics Technician Counseled (← links)
- 05000321/LER-1984-004-01, :on 840327,personnel Found That Scram Discharge Vol High Level Thermal Level Sensors 1C1L-N060 A-D Not Functionally Tested at Required Frequency.Caused by Lack of Procedure.Procedure Written & Implemented (← links)
- 05000321/LER-1980-062-01, Investigation of Pavement Deflection Revealed Settling of Fill Matl Under Svc Water & RHR Svc Water Lines.Caused by Improper Compaction of Area in Front of Intake Structure.Backfill Replaced (← links)
- 05000321/LER-1979-001-03, /03L-0 on 790109:during Steady State Power at 2400 Mwt,Plant Personnel Inadvertently Opened Both Doors of Reactor Bldg 130-ft Airlock R106.For Reasons Unknown,Switch Which Allows Defeat of Interlock Was Operated (← links)
- 05000321/LER-1983-117-03, /03L-0:on 831203,while Preparing to Run Diesel Generator 1C (1R43-S001C),valve 1P41-F401B Discovered Closed.Caused by Personnel Error.Valve Repaired (← links)
- 05000321/LER-1983-116-03, /03L-0:on 831202,links K96A & N Determined Open at Steam Condensing Mode Flow Control Valve IE11-F053A.Cause Unknown.Links Closed.Operation Verified (← links)
- 05000321/LER-1983-120-03, /03L-0:on 831209,during Performance of Control of Transient Combustibles (Procedure HNP-599),personnel Noted Fire Door IL48-C22 Would Not Close Completely.Caused by Component Failure Due to Normal Wear (← links)
- 05000321/LER-1983-114-03, /03L-0:on 831209,surveillance Personnel Noted That Mechanical Overspeed Trip Mechanism for RCIC Turbine Actuated Above Rated Speed.Caused by Setpoint Drift. Mechanism Recalibr (← links)
- 05000321/LER-1983-072-03, /03L-0:on 831121,during Reactor Bldg Vent Radiation & Arm Sys Calibr Procedure HNP-1-5114,control Room Radiation Sensors 241-N0154A & B Found Out of Tolerance. Caused by Setpoint Drift.Sensors Adjusted (← links)
- 05000321/LER-1983-115-01, /01T-0:on 831206,AE Personnel Determined That Four Sets of Reactor Water Cleanup Temp Thermocouples Inoperable & Two Other Sets Inoperable,As Installed.Caused by Improper Drawings.Thermocouple Switched (← links)
- 05000321/LER-1983-112-03, /03L-0:on 831117,two Vacuum Breakers Would Not Open & Close Properly.Caused by Inadequate Design of Vacuum Breaker Hinge Pin.Safety Relief Valve Discharge Line Vacuum Breakers Replaced (← links)
- 05000321/LER-1983-104-03, /03L-0:on 831118,while Performing Hydraulic Shock & Sway Arrestor Insp & Functional Test,Snubber 1B31-SS-A7 Discovered W/Low Reservoir Fluid Level.Caused by Inadequate Fluid Reserve Due to Leakage.Snubber Rebuilt (← links)
- 05000321/LER-1983-108-03, /03L-0:on 831121,during Safety/Relief Valve Position Primary & Secondary Indicators Ft&C Procedure HNP-1-3820,safety Relief Valve Tail Pipe Pressure Switches Actuated at 102 & 78 Psig,Respectively (← links)
- 05000321/LER-1991-015-01, :on 910823,loss of Power to B Reactor Protection Sys (RPS) Bus Due to B RPS motor-generator Set Tripped.Caused by Component Failure & MSL RM Design Inadequacy.Defective Light Bulb Replaced (← links)
- 05000321/LER-1979-081-01, Potential Failure Mode for Several Primary Containment Purge & Inerting Valves Discovered by Ae & Valve Vendor.During Loca,Valves Could Over Travel & Lose Seating Capability (← links)
- 05000321/LER-1983-111-03, /03L-0:on 831105,during Scram,Operating Personnel Determined That RCIC Could Not Be Controlled Manually.Caused by Separated Soldered Joint on Manual Amplified Circuit Board.Joint Resoldered (← links)
- 05000321/LER-1983-107-03, /03L-0:on 831102,flow Indicator for Core Spray Loop B Indicated 4,400 Gpm.Caused by Flow Indicator Transmitter Out of Calibr.Transmitter Replaced,Calibr & Functionally Tested (← links)
- 05000321/LER-1991-014-01, :on 910810,component Failure Occurred Resulting in Unplanned ESF Actuations.Failed Components Replaced, Operating Order Issued & Design & Field Review of SGTS Actuation Logic Completed (← links)
- 05000321/LER-1983-103-03, /03L-0:on 831025,filter Paper for Air Particulate Monitor 1D11-K631 Would Not Advance.Caused by Tear in Paper. Paper Advanced Beyond Tear & Rethreaded (← links)
- 05000321/LER-1983-106-03, /03L-0:on 831102,during Normal Operation,High Level Alarm in HPCI Oil Tank Received.Caused by High Humidity in HPCI Pump Room Causing Condensation to Form on Oil Tank.Water Contaminated Oil Replaced (← links)
- 05000321/LER-1991-012-01, :on 910619,discovered Instrument Calibr of post-LOCA Radiation Monitoring Sys Radiation Detector 1D11-N022A-D Not Performed at Required Frequency.Caused by Procedural Deficiency.Procedures Revised (← links)
- 05000321/LER-1983-064-03, /03L-0:on 831019,during ECCS Status Check Procedure HNP-1-1119,RCIC Steam Supply Primary Containment Inboard Isolation Valve 1E51-F007 Had No Position Indication.Cause Unknown (← links)
- 05000321/LER-1983-048-03, /03L-0:on 831004,plant Svc Water Pump 1C Overload or Lockout Relay Tripped & Alarm Received in Control Room. Caused by Electrical Insulation Breakdown in Motor Winding on Pump 1P41-C001C.Pump Motor Rewound (← links)
- 05000321/LER-1981-112-03, Torus to Rx Bldg Differential Pressure Switches 1T48-N210,N211,2T48-N210 & N211 Proof Press Not within Tech Spec Limit.Caused by Switch Misapplication.Also Reported Per Part 21 (← links)
- 05000321/LER-1983-102-03, /03L-0:on 831011,standby Liquid Relief Valve C41-F029A Declared Inoprable.Caused by Valve Failure.All Internal Parts Cleaned,Reassembled W/New Gaskets & Reinstalled.Valve Adjusted & Returned to Svc (← links)
- 05000321/LER-1983-098-03, /03L-0:on 831007,during Performance of RHR Svc Water Operability & Rated Flow Procedure,Pump E11-C001A Failed to Maintain Required Pressure While Maintaining Rated Flow.Caused by Improper Valve Stroke (← links)
- 05000321/LER-1983-101-03, /03L-0:on 830930,main Steam Line Radiation Monitor 1D11-K603D Discovered Inoperable.Caused by Setpoint Drift of Power Supply Voltages.Monitor Calibr Per Logarithmic Radiation Monitor Procedure (← links)
- 05000321/LER-1995-002-01, :on 950216,trip of Reactor Protection Sys Power Supply Resulted in Actuations of Engineered Safety Features. Replaced Voltage Regulator & Wiring (← links)
- 05000321/LER-1983-100-03, /03L-0:on 831009,during Performance of Procedure HNP-1-3111,outboard MSIV a (1B21-F028A) Closed in 2.8 s, Contrary to Tech Specs.Caused by Actuator Flow Control Needle Valve Being Out of Adjustment (← links)
- 05000321/LER-1983-090-03, During Procedure HNP-1-3405,RCIC Declared Inoperable.Caused by Setpoint Drift & Component Failure.Low Bearing Oil Pressure Switch Recalibr & Turbine Exhaust Switches Dried Out (← links)
- 05000321/LER-1983-094-03, /03L-0:on 830929,HPCI Steam Line Pressure Switches C&D Actuated Below Tech Spec Requirements.Caused by Setpoint Drift.Switches Recalibr (← links)
- 05000321/LER-1983-097-03, /03L-0:on 830918,operating Personnel Determined That Position of Control Rod 14-43 Could Not Be Ascertained. Caused by Failed Position Switch in Position Indicator Probe.Rod Moved to Position 18 (← links)
- 05000321/LER-1983-086-03, /03L-0:on 830830,during Routine Control Panel Check,Control Room Air Intake Monitor Indicated Downscale & Alarmed.Caused by Monitor Radiation Source Located Too Far from Sensor.Source Repositioned (← links)
- 05000321/LER-1983-084-03, Main Steam Line Radiation Monitors Found to Have High Setpoint Greater than Three Times Normal Operating Background.Caused by Procedural Inadequacy.Procedure Changed (← links)
- 05000321/LER-1983-093-03, /03L-0:on 830824,while Starting Hpci,Hpci Turbine Bearing Oil Pressure Low Alarm Received.Hpci Manually Tripped & Declared Inoperable.Caused by Personnel Error. Valves Repositioned & Oil Pressures Adjusted (← links)
- 05000321/LER-1983-080-03, /03L-0:on 830819,main Steam Line Radiation Monitor D (1D11-K603D) Determined Fluctuating & Drifted Downscale on 830821.Caused by Shorted Connector on Monitor Power Input Cable.Cable Replaced (← links)
- 05000321/LER-1983-077-03, /03L-0:on 830815,P-1 Computer Programs Calculated Core Max Fraction of Limiting Power Density to Be 1.014 & Cmapr to Be 1.000 Contrary to Tech Spec Requirements.Caused by Inaccurate P-1 Base Distribution Program (← links)
- 05000321/LER-1983-091-01, /01T-0:on 830827,during Maint Activities in Drywell,Safety Relief Valve Discharge Line Vacuum Breaker (1B21-F037D) Discovered Stuck Partially Open.Nine Other Vacuum Breakers Failed to Seat Properly (← links)
- 05000321/LER-1983-074-03, /03L-0:on 830815 & 18,filter & Demineralizer Conductivity Recorder 1G31-R601 Indicated Different Value than Tech Specs.Caused by Inoperative & Uncalibr Conductivity Meter,Respectively.Meter Calibr (← links)
- 05000321/LER-1983-075-03, /03L-0:on 830816,reactor Water Cleanup Sys Differential Flow Transmitter 1G31-NO36 Discovered Out of Calibr.Caused by Setpoint Drift.Transmitter Calibr (← links)
- 05000321/LER-1994-014, :on 941119,reactor Automatically Shut Down Per Design on Turbine Stop Valve Closure Which Resulted in Loss of Feedwater Heating.Caused by Damaged Wire in Drain Pot Level Switch.Switch Repaired on 941119 (← links)
- 05000321/LER-1994-013, :on 941103,false Low Turbine Speed Signal Resulted in Inoperable HPCI Sys.Caused by Failure or Misadjustment of Turbine Magnetic Speed Pickup.Magnetic Speed Pickup Replaced (← links)
- 05000321/LER-1983-059-03, /03L-0:on 830610,personnel Received Fission Product Monitor High/Low Flow Alarm & Found Monitor W/No Drywell Sample Flow.Caused by Personnel Lifting Wire from Coil of K5 Relay.Wire Replaced (← links)
- 05000321/LER-1983-062-03, /03L-0:on 830615,safety Relief Valves 1B21-F013 a, B & K Failed to Open During Reactor Scram.Caused by Component Failure.Pilot Assemblies Replaced for Valves a & K & Pilot Valve & Solenoid Replaced on Valve B (← links)
- 05000321/LER-1983-061-03, /03L-0:on 830615,standby Gas Treatment Sys Filter Inlet Damper & Exhaust Fan Discharge Damper Would Not Open. Caused by Blown Power Supply Fuse.Fuse Replaced (← links)
- 05000321/LER-1983-041-03, /03L-0:on 830329,following Group 5 Isolation, Outboard Reactor Water Cleanup Isolation Valve Failed to Open.Caused by Overheated D-C Drive Motor on Valve Operator. Drive Motor Replaced (← links)
- 05000321/LER-1983-126-03, /03L-0:on 831229,during Performance of HPCI Steam Line Pressure Instrument FTC Procedure,Hpci A,B,C & D Switches Actuated Below Requirements.Caused by Setpoint Drift.Switches Recalibr (← links)
- 05000321/LER-1983-122-03, /03L-0:on 831228,during HPCI Quick Start Procedure HNP-1-3316,HPCI Had Erratic Response & Was Tripped.Caused by Failed Ramp Generator Signal Convertor Unit.Convertor Replaced (← links)
- 05000321/LER-1983-113-03, /03L-0:on 831220,surveillance Personnel Noted Reactor Bldg Exhaust Vent Radiation Monitors 1D11-K609 A,B & C Inoperable.Caused by Monitors 1D11-K609 A,B & C Out of Calibr.Monitors Recalibr (← links)
- 05000321/LER-1983-124-03, /03L-0:on 831215,transverse in-core Probe B Detector Cable Could Not Be Withdrawn.Caused by Drive Cable Binding in Indexing Tube.Detector B Drive Cable & Indexing Tube Section Replaced (← links)
- 05000321/LER-1983-008-03, /03L-0:on 830112,during Performance of Clean Radwaste Water Processing Procedure,Personnel Discharged Waste Sample Tank a to River Before Sample Analyzed.Caused by Personnel Error.Responsible Individual Reprimanded (← links)
- 05000321/LER-1991-020, :on 911004,area Radiation Monitors (ARM) Tripped Due to Voltage Perturbation in Common Power Supply of Arms.Arm Trip Units Reset & Main Control Room Environ Control Sys Placed in Normal Mode of Operation (← links)
- 05000321/LER-1983-010-03, /03L-0:on 830110,during Reactor Coolant Instrumentation Lines Excess Flow Check Valve Operability review,12 Valves Found Inoperable.Caused by Electrical & Mechanical Component Failures.Valves Repaired/Replaced (← links)
- 05000321/LER-1982-090-03, /03L-0:on 821116,during Hydraulic Shock & Sway Arreston Insp & Functional Test Procedure,Snubber Found Inoperable.Caused by Component Failure Due to Worn Piston Rod Seal.Snubber Replaced & Returned to Operable Status (← links)
- 05000321/LER-1981-109-03, Surveillance Test Indicated HPCI Steam Line Pressure Switches N001A & N001D Actuated at 103 & 105 Psig,Respectively,Contrary to Tech Specs.Caused by Setpoint Drift.Barksdale Switches Recalibr (← links)
- 05000321/LER-1991-016-01, :on 910905,RWCU Sys Isolated Due to Blown Fuse. Cause for Fuse Blowing Not Determined.Blown Fuse Replaced & RWCU Sys Returned to Svc (← links)
- 05000321/LER-1991-011-01, :on 910612,missed Tech Spec Surveillances Occurred.Caused by Inadequate Procedure.Revising Affected Procedure to Require Verification of Receipt of Samples & Evaluation of Analyses (← links)
- 05000321/LER-1991-010-01, :on 910516,isolation Signal Received by RCIC Sys Valve 1E51-F105 & Valve Closed.Caused by Improper Routing of Wiring on Relay 1E51-K48 & Improper Installation of Relay Cover.Wiring Rerouted (← links)
- 05000321/LER-1994-015, :on 941128,discovered Surveillances Apparently Missed.Caused by Cognitive Personnel Error.Missed Surveillances Performed Successfully on Day Oversight Discovered (← links)
- 05000321/LER-1995-001, :on 950110,personnel Error Resulted in Missed TS Surveillance.Operations Shift Supervisor Was Counseled on Importance of Paying Attention to Detail (← links)
- 05000321/LER-1983-096-01, Drywell Svc Air Primary Containment Inboard Isolation Valve 1P51-F514 Opened During Plant Shutdown & Not Closed Prior to Startup on 830618. Caused by Procedural Inadequacy.Valves Closed (← links)
- 05000321/LER-1983-095-03, /03L-0:on 830913,during Hydrogen & Oxygen Analyzer Instrument Procedure,Analyzer a 1P33-N002A Found Out of Calibr.Caused by Instrument Drift.Analyzer Recalibr (← links)
- 05000321/LER-1983-088-03, /03L-0:on 830913,fire Protection Instrumentation Supervisory Circuit Panel 1Z43-P001 Gave Trouble Light & Alarm & Could Not Be Reset & Cleared.Caused by Improperly Closed Relays.Relays Adjusted (← links)
- 05000321/LER-1983-099-03, /03L-0:on 830901,drywell Torus Recorder Indicated Downscale & Declared Inoperable Due to Lack of Power.Caused by Personnel Error.Power Restored by Closing Power Link (← links)
- 05000366/LER-2020-001, Primary Containment Penetration Exceeded Maximum Allowable Primary Containment Leakage Rate (La) (← links)