Pages that link to "05000327/LER-2011-001, Regarding Both Trains of Control Room Air Conditioning Systems Inoperable"
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The following pages link to 05000327/LER-2011-001, Regarding Both Trains of Control Room Air Conditioning Systems Inoperable:
Displayed 11 items.
- 05000327/LER-2011-001 (redirect page) (← links)
- 05000327/LER-2005-001 (← links)
- 05000327/LER-1982-079, Forwards LER 82-079/03L-0 (← links)
- 05000327/LER-1982-075, Forwards LER 82-075/03L-0 (← links)
- 05000327/LER-1982-071, Forwards LER 82-071/03L-0 (← links)
- 05000327/LER-1982-074, Forwards LER 82-074/03L-0 (← links)
- 05000327/LER-1982-078, Forwards LER 82-078/03L-0 (← links)
- 05000327/LER-1982-076, Forwards LER 82-076/03L-0 (← links)
- 05000327/LER-1982-068, Forwards LER 82-068/03L-0 (← links)
- 05000327/LER-1982-072, Forwards LER 82-072/03L-0 (← links)
- 05000327/LER-1982-067, Forwards LER 82-067/03L-0 (← links)
- 05000327/LER-1982-059, Forwards LER 82-059/03L-0 (← links)
- 05000327/LER-1982-035, Forwards LER 82-035/03L-0 (← links)
- 05000327/LER-1982-034, Forwards LER 82-034/03L-0 (← links)
- 05000327/LER-1982-036, Forwards LER 82-036/03L-0 (← links)
- 05000327/LER-1982-033, Forwards LER 82-033/03L-0 (← links)
- 05000327/LER-1982-056, Forwards LER 82-056/03L-0 (← links)
- 05000327/LER-1982-054, Forwards LER 82-054/03L-0 (← links)
- 05000327/LER-1982-055, Forwards LER 82-055/03L-0 (← links)
- 05000327/LER-1982-040, Forwards LER 82-040/03L-0 (← links)
- 05000327/LER-1982-041, Forwards LER 82-041/03L-0 (← links)
- 05000327/LER-1982-116, Forwards LER 82-116/03L-0 (← links)
- 05000327/LER-1982-112, Forwards LER 82-112/03L-0 (← links)
- 05000327/LER-1982-111, Forwards LER 82-111/03L-0 (← links)
- 05000327/LER-1982-107, Forwards LER 82-107/01T-0 (← links)
- 05000327/LER-1983-005, Forwards LER 83-005/03L-0 (← links)
- 05000327/LER-1983-003, Forwards LER 83-003/01T-0 (← links)
- 05000327/LER-1980-161, Forwards LER 80-161/03L-0 (← links)
- 05000327/LER-1980-156, Forwards LER 80-156/01T-0 (← links)
- 05000327/LER-1982-108, Forwards LER 82-108/03L-0 (← links)
- 05000327/LER-1982-097, Forwards LER 82-097/03L-0 (← links)
- 05000327/LER-1982-101, Forwards LER 82-101/03L-0 (← links)
- 05000327/LER-1982-099, Forwards LER 82-099/03L-0 (← links)
- 05000327/LER-1982-102, Forwards LER 82-102/03L-0 (← links)
- 05000327/LER-1982-098, Forwards LER 82-098/03L-0 (← links)
- 05000327/LER-1982-100, Forwards LER 82-100/03L-0 (← links)
- 05000327/LER-1982-065, Forwards LER 82-065/03L-0 (← links)
- 05000327/LER-1982-066, Forwards LER 82-066/03L-0 (← links)
- 05000327/LER-1982-095, Forwards LER 82-095/01T-0 (← links)
- 05000327/LER-1981-137, Forwards LER 81-137/03L-0 (← links)
- 05000327/LER-1981-139, Forwards LER 81-139/03L-0 (← links)
- 05000327/LER-1982-094, Forwards LER 82-094/03L-0 (← links)
- 05000327/LER-1980-201, Forwards LER 80-201/03L-0 (← links)
- 05000327/LER-1980-198, Forwards LER 80-198/03L-0 (← links)
- 05000327/LER-1980-177, Forwards LER 80-177/03L-0 (← links)
- 05000327/LER-1980-153, Forwards LER 80-153/03L-0 (← links)
- 05000327/LER-1980-164, Forwards LER 80-164/03L-0 (← links)
- 05000327/LER-1980-162, Forwards LER 80-162/03L-0 (← links)
- 05000327/LER-1980-158, Forwards LER 80-158/01T-0 (← links)
- 05000327/LER-1982-093, Forwards LER 82-093/03L-0 (← links)
- 05000327/LER-1982-082, Forwards LER 82-082/03L-0 (← links)
- 05000327/LER-1982-088, Forwards LER 82-088/03L-0 (← links)
- 05000327/LER-1982-089, Forwards LER 82-089/03L-0 (← links)
- 05000327/LER-1982-092, Forwards LER 82-092/03L-0 (← links)
- 05000327/LER-1983-020, Forwards LER 83-020/03L-0 (← links)
- 05000327/LER-1983-016, Forwards LER 83-016/03L-0 (← links)
- 05000327/LER-1983-014, Forwards LER 83-014/03L-0 (← links)
- 05000327/LER-1983-012, Forwards LER 83-012/03L-0 (← links)
- 05000327/LER-1983-011, Forwards LER 83-011/03L-0 (← links)
- 05000327/LER-1983-007, Forwards LER 83-007/03L-0 (← links)
- 05000327/LER-1983-009, Forwards LER 83-009/01T-0 (← links)
- 05000327/LER-1983-002, Forwards LER 83-002/03L-0 (← links)
- 05000327/LER-1982-143, Forwards LER 82-143/03L-0 (← links)
- 05000327/LER-1982-139, Forwards LER 82-139/03L-0 (← links)
- 05000327/LER-1982-131, Forwards LER 82-131/03L-0 (← links)
- 05000327/LER-1983-045, Forwards LER 83-045/03L-0 (← links)
- 05000327/LER-1983-039, Forwards LER 83-039/03L-0 (← links)
- 05000327/LER-1982-117, Forwards LER 82-117/03L-0 (← links)
- 05000327/LER-1982-106, Forwards LER 82-106/03L-0 (← links)
- 05000327/LER-1982-012, Forwards LER 82-012/03L-0 (← links)
- 05000327/LER-1981-142, Forwards LER 81-142/03L-0 (← links)
- 05000327/LER-1982-128, Forwards LER 82-128/01T-0 (← links)
- 05000327/LER-1982-123, Forwards LER 82-123/03L-0 (← links)
- 05000327/LER-1982-121, Forwards LER 82-121/03L-0 (← links)
- 05000327/LER-1982-144, Forwards LER 82-144/03L-0 (← links)
- 05000327/LER-1995-004, Forwards LER 95-004 Re Identification That SR for Source Range Instruments in Both Units Auxiliary CRs Was Not Being Performed as Required by TS 3.3.3.5 (← links)
- 05000327/LER-1983-122, Updated LER 83-122/03X-1:on 830927 & 28,diesel Generator 2A-A Declared Inoperable Due to Failure to Maintain Load of 4,400 Kw During Surveillance Testing.Caused by Faulty Exciter (← links)
- 05000327/LER-1983-052, Forwards LER 83-052/03L-0 (← links)
- 05000327/LER-1983-054, Forwards LER 83-054/03L-0 (← links)
- 05000327/LER-1982-135, Forwards Updated LER 82-135/03X-1 (← links)
- 05000327/LER-1983-010, Forwards LER 83-010/03L-0 (← links)
- 05000327/LER-1983-056, Forwards LER 83-056/01T-0 (← links)
- 05000327/LER-1983-048, Forwards LER 83-048/03L-0 (← links)
- 05000327/LER-1983-043, Forwards LER 83-043/01T-0 (← links)
- 05000327/LER-1983-042, Forwards LER 83-042/03L-0 (← links)
- 05000327/LER-1983-040, Forwards LER 83-040/03L-0 (← links)
- 05000327/LER-1983-038, Forwards LER 83-038/01T-0 (← links)
- 05000327/LER-1983-041, Forwards LER 83-041/03L-0 (← links)
- 05000327/LER-1983-037, Forwards LER 83-037/03L-0 (← links)
- 05000327/LER-1983-035, Forwards LER 83-035/03L-0 (← links)
- 05000327/LER-1983-036, Forwards LER 83-036/03L-0 (← links)
- 05000327/LER-1983-026, Forwards LER 83-026/03L-0 (← links)
- 05000327/LER-1983-031, Forwards LER 83-031/01T-0 (← links)
- 05000327/LER-1983-025, Forwards LER 83-025/03L-0 (← links)
- 05000327/LER-1983-029, Forwards LER 83-029/03L-0 (← links)
- 05000327/LER-1983-018, Forwards LER 83-018/03L-0 (← links)
- 05000327/LER-1983-019, Forwards LER 83-019/03L-0 (← links)
- 05000327/LER-1982-080, Forwards LER 82-080/01T-0 (← links)
- 05000327/LER-1981-020, Forwards LER 81-020/03X-1 (← links)
- 05000327/LER-1983-022, Forwards LER 83-022/03L-0 (← links)
- 05000327/LER-1983-021, Forwards LER 83-021/03L-0 (← links)
- 05000327/LER-1997-002, Forwards LER 97-002-00,documenting Condition Resulting in Granting of Enforcement Discretion & to Deal W/Problems Encountered During Maint Activities to 2A-A DG Governor (← links)
- 05000327/LER-1997-007, Forwards LER 97-007-00,providing Details Re Start of Three Available Diesel Generators Occurring as Result of Cable That Was Cut While Drilling Hole in Control Room Electrical Panel (← links)
- 05000327/LER-1997-010, Forwards LER 97-010-00,re Failure to Properly Return Portion of Fire Protection Sys to Svc Following Mod Activity (← links)
- 05000327/LER-1998-004, Forwards LER 98-004-00,providing Details Concerning Inability to Complete Surveillance within Required Time Interval (← links)
- 05000327/LER-1999-001, Forwards LER 99-001-00 Re Condition That Resulted in Granting of Enforcement Discretion,Per Failure of Centrifugal Charging Pump.Condition Being Reported IAW 10CFR50.73(a)(2)(i)(B) & (a)(2)(iv) (← links)
- 05000327/LER-1980-028, Forwards Updated LER 80-028/01X-1 (← links)
- 05000327/LER-1980-065, Forwards Updated LER 80-065/03X-1 (← links)
- 05000327/LER-1998-002, Forwards LER 98-002-00,providing Details Concerning Inadequate Surveillance Testing of Gas Treatment Ventilation Sys (← links)
- 05000327/LER-1998-001, Forwards LER 98-001-00 Re Unit 1 Reactor Trip Resulting from Breaker Failure.Rept Submitted IAW 10CFR50.73(a)(2)(iv) as Event or Condition,Resulted in Automatic Actuation of Esfs, Including Reactor Protection Sys (← links)
- 05000327/LER-1999-002, Forwards LER 99-002-00 Re Start of Units 1 & 2 EDGs as Result of Cable Being Damaged During Installation of Thermo- Lag for Kaowool Upgrade Project (← links)
- 05000327/LER-2021-002, Letter Forwarding LER 2021-002-00 & LER 2021-001-00 for Sequoyah Nuclear Plant, Units 1 & 2 (← links)
- 05000327/LER-2024-001, Reactor Trip Due to a Turbine Trip (← links)
- 05000327/LER-2022-002, Turbine Trip Function Inoperable Due to Slow to Close Turbine Throttle Valve (← links)
- 05000327/LER-2022-001, Regarding Failure of 1B-B Centrifugal Charging Pump Results in Condition Prohibited by Technical Specifications (← links)
- 05000327/LER-2021-003, Exceeded Breach Margin Renders Both Trains of the Auxiliary Building Gas Treatment System Inoperable (← links)
- 05000327/LER-2021-001, Sequoya Nuclear Plant, Unit 1, Reactor Trip on High Neutron Flux Rate Due to Dropped Control Rods (← links)
- 05000327/LER-1998-001-04, :on 980519,automatic Reactor Trip Occurred. Caused by Failure of Alternate Feedwater to 1A1-A 480-volt Shutdown Board.Normal Feedwater Breaker Placed in Svc & 480- Volt Shutdown Board Returned to Operation (← links)
- 05000327/LER-1989-017, :on 890613,observed That Auxiliary Control Room Pressurizer Level Indicators Were Indicating High as Compared to Main Control Room Level Indicators.Caused by Improper Calibr.Part 21 Related (← links)
- 05000327/LER-1989-020-01, :on 890705,observed That Reactor Vessel Level Indicating Sys upper-range Indicator Was Indicating High as Compared to Redundant Channel.Caused by Inadequate Channel Checks Due to Inadequate Procedure (← links)
- 05000327/LER-1989-013, :on 890503,train B Control Room Isolation Signal Received in Main Control Room.Caused by Operator Bumping Radiation Monitor Pump Motor Breaker While Changing Recorder Chart Paper.Chart Paper Replaced (← links)
- 05000327/LER-1989-014, :on 890506,limiting Condition for Operation Entered When Both Trains of Auxiliary Bldg Gas Treatment Sys Inoperable.Caused by Opening Control Power Fuse During Replacement of Indicating Lamp.Fuse Replaced.W/Undated Ltr (← links)
- 05000327/LER-1988-028, :on 880723,hourly Fire Watch Patrol Through 734 Ft Elevation of Auxiliary Bldg Suspended.Caused by Valve Leaks in Safety Injection Sys.Auxiliary Bldg Gas Treatment Sys Manually Initiated (← links)
- 05000327/LER-1989-025, :on 890815,all Four Emergency Diesel Generators Declared Inoperable Because Fuel Oil Not Sampled.Caused by Inadequate Procedure Due to Chemistry Personnel Omission. Samples Obtained & Analyzed (← links)
- 05000327/LER-1988-047, :on 881225,erratic Feedwater Controls Caused Feedwater Isolation on hi-hi Steam Generator (S/G) Level & Resulted in Reactor Trip.Caused by Difficulty in Controlling S/G Levels.Valve Controllers fine-tuned (← links)
- 05000327/LER-1989-006-02, :on 890216,auxiliary Bldg Waste Packaging Area Door A111 Breached W/O Issuance of Breaching Permit.Caused by Incomplete Door Identification,Inadequate Programmatic Control & Personnel Oversight.Door A111 Closed (← links)
- 05000327/LER-1997-013-01, Forwards LER 97-013-01 Re Missed Surveillance as Result of Inadequate Procedure.Revs Annotated by Vertical Bar to Right of Text (← links)
- 05000327/LER-1989-007, :on 890319,train a Control Room Isolation Occurred.Caused by Incompatibility of Replacement Smoke Detector Unit Relay Contact Configuration W/Application Requirements.Work Request Initiated (← links)
- 05000327/LER-1989-018-01, :on 890619,discovered That Both Trains of Auxiliary Bldg Gas Treatment Sys (ABGTS) Automatic Actuation Could Have Been Rendered Inoperable.Caused by Removal of Radiation Monitor During Testing (← links)
- 05000327/LER-1989-024-01, :on 890805,inadvertent Train B Containment Vent Isolation Occurred While Performing Surveillance Testing. Caused by Difficult man-machine Interfaces.Operators Verified No High Radiation Condition Existed (← links)
- 05000327/LER-1989-011-01, :on 890413,shift Supervisor Notified That Unit Entered Limiting Conditions for Operations During Surveillance Instruction for RHR Pump.Caused by Inadequate Procedure Rev & Oversight.Fsar Revised.W/Undated Ltr (← links)
- 05000327/LER-1989-021-02, :on 890713,diesel Generator Board Room Fire Protection Sys Inoperable Due to Failure to Close During Performance of Surveillance Instruction.Caused by Inadequate Technical Review of Surveillance.Door Repaired (← links)
- 05000327/LER-1989-017-01, :on 890613,observed That Auxiliary Control Room Pressurizer Level Indicators Indicating High.Caused by Failure to Properly Calibr Pressurizer Level Transmitters During Calibr Check.Instructions to Be Revised (← links)
- 05000327/LER-1988-007, :on 880124,discovered That Auxiliary Bldg Secondary Containment Encl Not within Set Configuration. Caused by Lack of Maint Control & Inappropriate Design Assumption.Blast Door Reopened After Testing (← links)
- 05000327/LER-1989-023-01, :on 890728,Limiting Condition for Operation 3.4.11 Not Entered After RCS Head Vents Inoperable.Caused by Personnel Error.Plant Drawing Changes & Procedures Revs Will Be Implemented (← links)
- 05000327/LER-1989-012-01, :on 890410,containment Ventilation Isolation Occurred Due to Spurious High Radiation Spike on Noble Gas Channel of Lower Containment Radiation Monitor.Investigation of Incident to Be Completed by 890531 (← links)
- 05000327/LER-1989-018, :on 890619,0726 & 1010 & 890628,four Events Occurred Re Auxiliary Bldg Gas Treatment Sys During Periods When Radiation Monitor Was Removed from Sys.Caused by Inappropriate Inclusion of Monitor (← links)
- 05000327/LER-1987-030, :on 890620 & 0704,four Standby Diesel Generators Started Due to Blown Fuse in Remote Emergency Start Circuitry & 125 Volt Dc Vital Battery Board Ii.Caused by Defective Fuse.Fuses Replaced (← links)
- 05000327/LER-1989-022-01, :on 890722,power Range Excore Detector N-43 on Unit Failed During Operation & Declared Inoperable.Caused by Inadequate Procedure.Surveillance Instruction SI-178 Revised to Correct Deficiencies (← links)
- 05000327/LER-1989-012, :on 890410,containment Ventilation Isolation Occurred Due to High Radiation Spike on Radiation Monitor. Cause of Spike Undetermined.Containment Ventilation Isolation Reviewed to Evaluate ESF Actuations (← links)
- 05000327/LER-1989-004, :on 890127,seismic Monitor Annunciator Switches Outside Acceptable Limits Due to Inadequate Instruction. Personnel Involved Will Be Counseled & Advised of Proper Actions to Take Under Similar Situation (← links)
- 05000327/LER-1989-010-02, :on 890329,review of Surveillance Instruction Packages Determined That SI-307.2 Was Out of 18-month Tech Spec Required Frequency.Caused by Scheduled Date Based on Incomplete Package.Personnel Counseled (← links)
- 05000327/LER-1989-021-01, :on 890713,fire Protection Sys Questioned When Fire Door Failed to Close During Surveillance Instruction 237.2.Caused by Inadequate Technical Evaluation of Deficiency.Work Request B252362 Replanned (← links)
- 05000327/LER-1989-019-01, :on 890713,containment Ventilation Isolation Occurred from Radiation Monitor 1-RM-90-131.Caused by Grounding of Handswitch HS-90-136A2.Operations Supervisor Verified Alarm to Be False & Unit Recovered (← links)
- 05000327/LER-1989-003-02, :on 890218,motor-driven Auxiliary Feedwater Pump 1A-A Started Following Control Power Interruption to 6.9 Kv Shutdown Board 1A-A.Caused by Breaker 204 Opening. Personnel Verified Pump 1A-A Starting (← links)
- 05000327/LER-1989-005, :on 890210,reactor Trip Occurred Resulting from Closure of Main Feedwater Regulating Valves on Loss of Power to Valve Controllers.Caused by Personnel Error.Event Discussed W/Instrument Maint Planners (← links)
- 05000327/LER-1989-016, :on 890516,train a Containment Ventilation Isolation Occurred.Caused by Inadequate Corrective Action. Operations Personnel Reset Containment Ventilation Isolation.Instruction 90.1B Revised (← links)
- 05000327/LER-1989-008-01, :on 890320,control Room Emergency Ventilation Sys Declared Inoperable Following Tornado Dampers Closure. Caused by Incomplete Evaluation of Effect of Closing Tornado Dampers by Licensed Operator.Dampers Opened (← links)
- 05000327/LER-1989-015, :on 890513,Train B Control Room Isolation Occurred.Caused by Defective Auxiliary Contacts of Manual 480 Volt Motor Starter.Contacts Replaced (← links)
- 05000327/LER-1988-033, :on 881004,unplanned Reactor Trip Signal Generated Due to Reactor Protection Sys (RPS) Channel I Instrument Failure During RPS Channel II Calibr.Possibly Caused by Component Aging (← links)
- 05000327/LER-1989-007-01, :on 890319,train a Control Room Isolation (Cri) Occurred.Caused by Personnel Error.Facility Assistance Shift Operations Supervisor Suspended Maint Activity on Smoke Detectors & Verified Train a Cri for Radiation (← links)
- 05000327/LER-1989-009, :on 890319,discovered That Switch on Local Control Panel for CO2 Fire Suppression Sys Protecting Computer Room in Off Position.Caused by Personnel Error. Identification Tags Placed on Control Panels (← links)
- 05000327/LER-1987-042, :on 870414,condition Adverse to Quality Rept Initiated Re Start of Fire Pumps During Loca.Caused by Design Error.Fire Pumps to Be Placed Under Administrative Controls to Allow Manual Start Only (← links)
- 05000327/LER-1987-056, :on 870811,combined Bypass Leakage Limit Potentially Violated.Caused by Deficient Tech Spec Table 3.6-1 Due to Incomplete List of Bypass Leakage Paths to Auxiliary Bldg Due to Lack of Design Criteria (← links)
- 05000327/LER-1987-026, :on 870526,Tech Spec 6.12.2 Violated Due to Inadequate Radiological Control Coverage in Transfer of Radwaste.Caused by Personnel Error.Personnel Counseled & Mgt Instructed (← links)
- 05000327/LER-1985-031, :on 850729,auxiliary Bldg Isolation Occurred Due to High Radiation Levels from Cracked Chemical & Vol Control Sample Line Weld.Caused by Fatigue of Metal in Weld. Brace Will Be Installed by Next Outage (← links)
- 05000327/LER-1987-054, :on 870810,Tech Spec Action Requirement Not Met on Control Room Isolation Radiation Monitors Due to Equipment Being Inoperable for Required Testing.Caused by Design Deficiency.Monitor Returned to Svc (← links)
- 05000327/LER-1987-049, :on 861201,significant Condition Rept Initiated Due to Lack of Assurance That Motor Overloads Would Allow Starters to Perform safety-related Action W/O Uncertainty. Caused by Const Deficiency.Mods Underway (← links)
- 05000327/LER-1987-051, :on 870812,during Essential Raw Cooling Water Sys Insp,Determined That Certain skid-mounted Valves Not Checked for Proper Position on 31-day Interval,Per Tech Specs.Caused by Administrative Error (← links)
- 05000327/LER-1987-055, :on 870217,Rev 0 to Significant Condition Rept SQNEEB8743 Issued Re Loss of Water Supply to Auxiliary Feedwater Sys.Caused by Design Deficiencies for Installation of Instrument Lines.Change Notices Issued (← links)
- 05000327/LER-1987-053, :on 870805,diesel Generator 1B-B Inadvertently Started During Connection of Jumper in Train B Relay Cabinet.Caused by Personnel Error & Unclarified Procedure. Jumper Replaced & Personnel Counseled (← links)
- 05000327/LER-1987-041, :on 870804,momentary Loss of RHR Flow Occurred When Valve 1-FCV-74-2 Inadvertently Closed,Isolating RHR Pump 1A-A Suction from RCS Loop 4 Hot Leg.Caused by Personnel Error.Student Assistant Counseled (← links)
- 05000327/LER-1987-037, :on 870728,capacity of ESF Safety Features Equipment Coolers Determined Inadequate for LOCA Conditions. Caused by Calculation Errors Due to Use of Wrong Heat Load Data.Surveillance Procedure Will Be Revised (← links)
- 05000327/LER-1987-040, :on 870113,problem W/Vulcanizing Silicone Foam,Sealant & Boot Seals Installed in Reactor Shield Bldg Identified.Caused by Matl Misapplication.Reactor Shield Bldg Mechanical Seals Reevaluated (← links)
- 05000327/LER-1987-034, :on 870724,determined That Present Design of Containment Vacuum Relief Sys Violated GDC 56.Caused by Misinterpretation of GDC by Design Engineers.Surveillance Instructions 14.1 & 14.2 Revised (← links)
- 05000327/LER-1987-052, :on 870723,potential Problem Identified W/ Emergency Diesel Generator Speed During Containment Spray Pump Startup Following Phase B Containment Isolation.Caused by Design Error.Procedures Established (← links)
- 05000327/LER-1987-044, :on 870724,determined That Moderate Energy Line Breaks Might Impair Components Required for Safe Shutdown. Caused by Inadequate Analysis of Breaks Due to Inadequate Communication.Bldg Walls Sealed (← links)
- 05000327/LER-1987-033, :on 870129,problems Re Adequate Design Calculations Being Unavailable Identified.Caused by Lack of Established Calculation Requirements Existing to Ensure Plant Design Bases Met.Procedure Changed (← links)
- 05000327/LER-1987-046, :on 870722,util Informed by Westinghouse That Potential Exists for Unacceptable Dilution of ECCS During Large Break LOCA Due to Postulated Nonborated Water Addition to Sump.Evaluation Underway (← links)
- 05000327/LER-1987-050, :on 870723,containment Spray Sys Pumps Could Not Deliver Flow Required by Plant Fsar.Caused by Design Deficiency.Pump Flow Orifice Bored Out & Tech Spec Change Requested (← links)
- 05000327/LER-1987-043, :on 870717,inadvertent Control Room Isolation Occurred.Caused by Electromagnetic Interference on Radiation Monitor During Flow Switch Testing.Arc Suppressors to Be Installed in Flow Switch Circuits (← links)
- 05000327/LER-1987-047, :on 870717,potential for Inadequate Containment Cooling After non-LOCA Event Identified.Caused by Design Error.Lower Compartment Cooler Sys Environmentally & Seismically Qualified to Provide Cooling (← links)
- 05000327/LER-1987-039, :on 870710,potential for Single Failure of Main Control Room Normal Pressurization Sys Observed.Root Cause & Proposed Corrective Action Under Investigation.Suppl to Rept Will Be Submitted by 871204 (← links)
- 05000327/LER-1998-002-03, :on 980716,inadequate Surveillance Testing Was Discovered.Caused by Misinterpretation of ANSI Standard. Revised Appropriate Procedures to Provide Required Guidance (← links)
- 05000327/LER-1987-073, :on 871110,determined That Centrifugal Charging Pumps May Not Start Using Manual Handswitch & May Not Be Available to Mitigate Consequences of Postulated Accident. Caused by Inadequate Review of Design Info (← links)
- 05000327/LER-1987-072, :on 871110,ESF Equipment Room Coolers Inadequate to Maintain Temps within Environ Qualification Profiles.Caused by Inadequate Design Control Program.Duct Work to Be Revised & Filtration Sys Installed (← links)
- 05000327/LER-1987-071, :on 871005,two Separate Conditions in ERCW Sys Resulted in Potential Degradation of ERCW Flow to Plant. Caused by Failure to Follow Administrative Procedure. Appropriate Documentation Issued (← links)
- 05000327/LER-1986-015, :on 860407 & 09,failure to Properly Functional Test Reactor Coolant Pump Devices & Electrical Breakers Noted.Caused by Inadequate Test Procedure.Procedure Revised to Ensure Use of Proper Test Techniques (← links)
- 05000327/LER-1987-060, :on 870827,inadvertent Diesel Generator Start Occurred.Caused by Inadequate Procedure During Shutdown Board 1B-B Maint.Energized Studs on Shutdown Board 1B-B Taped to Prevent Shorting Studs Together (← links)
- 05000327/LER-1987-065, :on 871023,ERCW Screen Wash Pumps Omitted from ASME Section XI Test Program Resulting in Potential Degradation of ERCW Flow.Caused by Personnel Error.Test Program Revised to Include Wash Pumps (← links)
- 05000327/LER-1987-069, :on 871027,containment Spray Pump Start Contact for Spray Discharge Valves Determined Excluded from Response Time Testing.Caused by Procedure Deficiency.Pump Start Response Time Steps Revised (← links)
- 05000327/LER-1987-070, :on 871021,discovered Voltage Regulator Problem on Emergency Diesel Generator 2A-A.Caused by Installation of Defective Component.Defective Voltage Regulator Repaired. Part 21 Related (← links)
- 05000327/LER-1987-067, :on 871027,monitor Tank Dilution Flow Not Verified During Liquid Effluent Release.Caused by Trainee Failure to Follow Procedure While Performing Batch Release. Personnel Involved Counseled (← links)
- 05000327/LER-1987-068, :on 871027,discovered That Tech Spec Surveillance Interval Exceeded Due to Data Sheet Missing from Completed Surveillance Instruction.Caused by Personnel Error.Personnel Counseled.Procedure Revised (← links)
- 05000327/LER-1987-066, :on 871022,determined That Component Cooling Water Sys (Ccws) Pump Seal Leakage Could Deplete Ccws Water Inventory in 52 H Following Loca.Caused by Lack of Analysis on Leakage Rates.Procedures Will Be Revised (← links)
- 05000327/LER-1987-064, :on 871013,five Piping Spool Pieces Used During Stage II Flood Preparation Plan Do Not Fit Properly.Caused by Piping Orientation Changes.Insp Made.Spool Pieces Will Be Modified by 880101 (← links)
- 05000327/LER-1987-045, :on 871009,discovered That Potential Failure of non-class 1E Speed Switches Could Render Safety Grade ERCW Inoperable.Caused by Inadequate Design Control Process in Place at Time ERCW Traveling Screens Upgraded (← links)
- 05000327/LER-1987-035, :on 870709,standby Diesel Generator Start Occurred During Fuse Replacement in Remote Emergency Start Circuit.Caused by Loss of Continuity of Alligator Clips of Jumper Assembly.Troubleshooting Performed (← links)
- 05000327/LER-1987-038, :on 870708,discovered That Kv Circuit Breakers Used to Protect 1E Busses from Faults on non-1E Loads Not Tested.Caused by Engineering Oversight.New Surveillance Instruction Will Be Written (← links)
- 05000327/LER-1987-036, :on 870706,determined That Nonconforming Timing Relays Installed in Containment Air Return Controls on 841212 After Fan 1B-B Failed to Start.Caused by Personnel Errors Resulting from Procedural Inadequacies (← links)
- 05000327/LER-1987-031-01, :on 870707,discovered That Emergency Gas Treatment Sys Filter Banks Not Being Tested to ANSI N510-1975 as Required by Tech Spec 3.6.1.8.Caused by Procedural Inadequacy.Procedure Revised (← links)
- 05000327/LER-1987-058, :on 870926,diesel Generator 2B-B Inadvertently Started Due to Personnel Failure to Render Generator Inoperable Prior to Pulling Fuses.Caused by Inadequate Preplanning of Work to Be Performed (← links)
- 05000327/LER-1987-048, :on 870422,3 of 16 Conductors Considered worst- Case Vertical Drop Cables Failed high-potential Test.Lab Testing Found Silicone Rubber Cables More Susceptable to Impact Damage.Root Cause Unknown (← links)
- 05000327/LER-1989-006, :on 890216,discovered That Auxiliary Bldg Waste Packaging Area Door Breached W/O Issuance of Breaching Permit.Caused by Inadequate Training & Programmatic controls.Plant-wide Dispatch Issued on 890223 (← links)
- 05000327/LER-1987-031, :on 870623,during Testing of Chlorine Detection Sys,Control Room Isolation Train a Initiated.On 870624,Train B Chlorine Detector Inoperable.Caused by Blown Fuse & Clogged Drip Sys,Respectively.Fuse Replaced (← links)
- 05000327/LER-1987-013, :on 870201,spillage Occurred in Unit While in Mode 5.Caused by Procedural Inadequacies.Special Training Conducted for Operators & Supervisor/Engineer Will Review Clearance for Open RCS Work (← links)
- 05000327/LER-1987-062, :on 870911,unplanned Loss of Tornado Generated Missile Protection for Cables Associated W/Diesel Generators Identified.Caused by Programmatic Deficiency in Design Change Process & Failure of Review Process (← links)
- 05000327/LER-1987-029, :on 870615,determined That Evaluation Records Not Maintained & Periodic Annual Repts of Onsite Changes of Environ Portion of Tech Specs Not Submitted.Caused by Lack of Procedures.Instructions Will Be Revised (← links)
- 05000327/LER-1987-059, :on 870831,alpha Contamination Checks for Two Sealed Sources Not Performed.Caused by Inadequate Accountability for Surveillance Requirements.Sources Checked & Surveyed for Contamination (← links)
- 05000327/LER-1987-028, :on 870611,determined That Both Control Air Trains Could Be Lost in Event of Offsite Power Loss.Caused by Design Deficiency.Jumpers Installed Around sealed-in Contacts to Provide Automatic Reset (← links)
- 05000327/LER-1987-057, :on 870915,control Room Isolation Occurred from Train a Chlorine Monitor.Cause Undetermined.Engineer Cleared Isolation & Returned Ventilation Sys to Normal (← links)
- 05000327/LER-1987-075, :on 871203,determined That Rev 14 of Surveillance Instruction SI-118 Did Not Completely Test Auxiliary Feedwater Bypass Level Control Valves.Caused by Inadequate Procedure.Procedure Change Ongoing (← links)
- 05000327/LER-1999-002-03, :on 990916,EDG Started as Result of Cable Being Damaged During Installation of Thermo-Lag for Kaowool Upgrade Project.Caused by Inadequate pre-job Briefing. Involved Individuals Were Counseled on Event (← links)
- 05000327/LER-1997-012-01, :on 970801,manual Reactor Tripped Due to Loss of Control Air.Caused by Corrosion Products (Rust Debris) Inhibiting Full Closure of One of six-inch Gate Valves. Isolated Breached Control & Svc Air Sys Header (← links)
- 05000327/LER-1986-045, :on 861002,short Occurred in Remote Control Power Branch Circuit Resulting in Blown MIS-5 Fuse in Feeder Circuit C42.Caused by Deenergized Wire Touching Energized Part of Circuit During Maint (← links)
- 05000327/LER-1986-030, :on 860717,three Tech Spec Surveillance Requirements Not Performed.Caused by Procedure Inadequacy & Deficiency in Initial Writing of Section of Tech Spec.Tech Spec Change Will Be Submitted (← links)
- 05000327/LER-1986-041, :on 860914,power Inadvertently Removed from Logic Relay Panel for Shutdown Board 2B-B,starting Standby Diesel Generators.Caused by Procedural Inadequacy.Diesel Generators Shut Down (← links)
- 05000327/LER-1986-040, :on 860826,discovered That Use of Water Seal for Essential Raw Cooling Water Isolation Valves Invalid. Caused by Procedural Inadequacy Due to Failure to Properly Evaluate Bases of Leakage Test (← links)
- 05000327/LER-1986-052, :on 861104,high Radiation Area Door Left Unlocked.Caused by Two Personnel Errors.Personnel Involved Counseled on Procedural & Tech Spec Compliance Requirements (← links)
- 05000327/LER-1987-025, :on 870506,determined That Tech Spec Surveillance Requirement 4.6.4.3.a Acceptance Criteria Not Being Fully Implemented.Caused by Inadequate Procedure. Surveillance Instructions to Be Revised (← links)
- 05000327/LER-1987-021, :on 870417,inoperable Fire Barrier Not Brought to Attention of Shift Engineer for One Day in Violation of Tech Spec.Caused by Personnel Error.Continuous Fire Watch Established.Training Session Will Be Modified (← links)
- 05000327/LER-1986-053, :on 861031,noncompliance W/Tech Spec to Estimate Sampler Flow Rate Every 4 H While in Mode 5 Discovered.Caused by Erroneous Cancellation of Surveillance Instruction.Personnel Counseled (← links)
- 05000327/LER-1980-041-03, /03X-3:on 800430,sample Isolation Valves 1FCV-90-108,-109,-110,-114,-115 & -116 Closed.Caused by Isolation of Nonessential Control Air to Sample Valves. Control Air Restored & Valves Reopened (← links)
- 05000327/LER-1986-049, :on 861102,standby Diesel Generators Started on Loss of Voltage to Shutdown Board 1B-B 6.9 Kv.Caused by Personnel Error.Signs Will Be Added to End of Each 6.9 Kv Unit Board to Designate Board Ends (← links)
- 05000327/LER-1987-023, :on 870430,insp of Ice Condenser Vent Assemblies Not Performed,Per Tech Specs Due to Lack of Guidance in Surveillance Instruction.Instruction Revised to Clarify Insp Requirements (← links)
- 05000327/LER-1987-022, :on 870428,six Valves in Fire Protection Sys Not Cycle Tested,Per Tech Spec Surveillance Requirement. Caused by Inadequate Procedure.Surveillance Instruction Revised to Include Six Valves in Checklist (← links)
- 05000327/LER-1986-050, :on 861030,possible Violation of Surveillance Requirements Discovered.Caused by Error in Surveillance Instruction SI-156.Instruction Will Be Revised to Show Correct Position of Root Valves (← links)
- 05000327/LER-1984-025-01, :on 840415,sampling of RCS for Boron Concentration Initiated,Causing Pressurizer Level Transmitter 1-LT-68-320 to Be Inoperable.Caused by Operator Error.Transmitter Moved (← links)
- 05000327/LER-1980-022-03, /03X-2:on 800318,sample Isolation Valves 1-FCV-90-108,109,110,114,115 & 116 Closed,Isolating Radiation Monitors.Caused by Isolation of Nonessential Control Air to Sample Valves.Valves Reopened (← links)
- 05000327/LER-1987-024, :on 870424,local Stroke Time for Flow Control Valve 2-FCV-74-3 Exceeded Max Allowable Limits.Caused by Procedural Inadequacy.Procedure SI-166.4, Remote Valve Indication Verification Revised (← links)
- 05000327/LER-1986-001, :on 860525,discovered That Boration Flow Path Surveillance Requirement Not Adequately Performed on 860129 & 0426.Caused by Inadequate Procedure.Surveillance Instruction 64 Revised (← links)
- 05000327/LER-1986-001-03, :on 860128,0203,06 & 17,hourly Fire Watches Missed.Caused by Inaccessible Doors Due to Removal of Irradiated Specimen from Spent Fuel Pit & Inoperable Fire Doors (← links)
- 05000327/LER-1986-048, :on 860820,during Review of Plant Surveillance Instructions,Adequacy of SI-260.2, Bit Cold Leg... Questioned.On 861016,CCP 2A-A Failed to Meet Acceptance Criteria.Caused by Inadequate Procedure (← links)
- 05000327/LER-1987-018, :on 870317,during Cold Shutdown,Surveillance Instruction SI-166.16 Re Component Cooling Sys Check Valve Test Found Inadequate.Caused by Personnel Error.Instruction Changed to Acceptable Test Method (← links)
- 05000327/LER-1986-059, :on 861231,eight Fire Dampers in Diesel Generator Bldg Identified as Not Being Verified Functional by Visual Insp Every 18 Months.Caused by Personnel Error. Surveillance Instruction SI-233.3 Changed (← links)
- 05000327/LER-1987-011, :on 870129,discovered Failure to Perform Increased Frequency Testing of Valves Per ASME Section Xi. Caused by Programmatic & Personnel Errors.Stroke Time Tests Will Be Revised to Increase Frequency (← links)
- 05000327/LER-1987-007, :on 870130,discovered That Procedures Failed to Include Response Time Testing of Small Portion of Several Radiation Monitor Channels.Caused by Procedural Deficiency. Procedures Revised (← links)
- 05000327/LER-1987-008, :on 870126,determined Surveillance Instruction Re ERCW Valves Servicing safety-related Equipment Did Not Ensure Compliance W/Tech Spec Surveillance Requirement. Caused by Personnel Error.Instruction Revised (← links)
- 05000327/LER-1985-019-01, :on 850524,inadequate Seismic Piping Supports Discovered.Caused by Personnel Errors.Drawing Discrepancies Re Both Pipes Corrected & Sk Series of Prints Superseded by 47W Series of Prints (← links)
- 05000327/LER-1986-026, :on 860629,sudden Pressure Relay Failed on Common Station Svc Transformer D,Causing Fire Suppression Sys to Spray Transformer W/Water & Subsequent Transformer Trip.Caused by Shortened Microswitch in Relay Housing (← links)
- 05000327/LER-1986-046, :on 861010,Surveillance Requirements 4.7.9.e.3 & 4.7.9.f Re Snubber Drag Force Trending Not Met.Caused by Personnel Failure to Follow Procedures.Evaluations Will Be Completed for Involved Snubbers Before Restart (← links)
- 05000327/LER-1986-024, :on 860525,security Micro Access Computer Malfunctioned,Locking All Security Access Doors.Caused by Complete Loss of Access Memory.Backup Battery Replaced & Disk Drive Unit Cleaned (← links)
- 05000327/LER-1987-005, :on 870121,while Performing post-maint Response Time Test,Inadvertent Reactor Trip Breaker Trip Occurred. Caused by Personnel Error.Technician Counseled on Importance of Following Written Instructions (← links)
- 05000327/LER-1987-004, :on 870113,discovered That Determination of Charcoal Adsorber Bank Efficiency by Technical Instruction TI-9 Performed Improperly.Caused by Personnel error.TI-9 Revised to Ensure Accurate Adsorber Efficiency (← links)
- 05000327/LER-1986-044, :on 860925,determined That Surveillance Instructions Did Not Adequately Verify ECCS Flow.Caused by Procedural Inadequacy.Procedure Changed to Ensure Injection Flow Path (← links)
- 05000327/LER-1986-043, :on 860910,Surveillance Instruction (SI)-156 for Surveillance Requirement 4.6.1.2 Did Not Provide for Venting of Three Containment Isolation Valves During Testing.Caused by Inadequate Review (← links)
- 05000327/LER-1987-002, :on 870107,discovered That Tritium Contribution to Monthly Dose Calculation Not Evaluated.Caused by Procedural Deficiency.Surveillance Instructions Revised to Include Tritium in Monthly Dose Calculation (← links)
- 05000327/LER-1986-039, :on 860825,determined That Total Interlock Function Not Verified During Channel Calibr.On 860827, Determined That Surveillance Instruction Does Not Verify Door Position.Caused by Inadequate Procedures (← links)
- 05000327/LER-1987-001, :on 870106,trip Setpoint for Acbs on Shutdown Boards That Feed Control & Auxiliary Bldg Vent Boards Discovered Incorrect.Caused by Design Error.Breaker Trip Settings Will Be Corrected (← links)
- 05000327/LER-1986-036, :on 860820,discovered That Quorum for 860527 Meeting Not Documented.Caused by Failure to Properly Log Names of Plant Operations Review Committee Members Present During Meeting.Review of Minutes Completed (← links)
- 05000327/LER-1986-034, :on 860814 & 15,Surveillance Instructions SI-238.1 & SI-302.2 Discovered Not Conducted within Time Limits.Caused by Personnel Errors.Instructions Conducted & Personnel Counseled (← links)
- 05000327/LER-1986-035, :on 860807,discovered Response Time Procedure Did Not Test for Diesel Generator Start Signal on Loss of Voltage to Shutdown Boards.Caused by Procedural Error. Procedure Revised (← links)
- 05000327/LER-1986-060, :on 861229,control Room Isolation Occurred. Caused by Loose Connection of Plug on Wire Lead of Filter Capacitor.Connection Resoldered & Monitor Operability Verified (← links)
- 05000327/LER-1987-009, :on 870130,discovered That Method to Determine Ice Condenser Ice Bed Ph Not in Compliance W/Tech Spec Surveillance Requirements.Caused by Personnel Error. Technical Instructions Revised (← links)
- 05000327/LER-1986-058, :on 861210,fire Watch for out-of-svc CO2 Sys Dismissed Prior to Returning Sys to Svc.Caused by Personnel Error.Personnel Counseled (← links)
- 05000327/LER-1986-057, :on 861210,deficient Design for Two Hand Switches That Control Tornado Dampers Discovered.Deficiency Would Lead to Failure to Comply W/Tech Spec 3.7.7.Caused by Personnel Error.Instruction to Be Revised (← links)
- 05000327/LER-1986-054, :on 861201,discovered That Discrepancy Existed Between Data Contained on Drawings for 125-volt Dc Vital Battery Sys & Data Used in Surveillance Instruction (SI)- 105.Instruction Will Be Revised (← links)
- 05000327/LER-1986-055, :on 861201,during Cold Shutdown,Auxiliary Bldg Isolation (Abi) Occurred W/O Associated Relays Sealed In. Cause Probably Due to Spike on Radiation Monitor 0-RM-90-102.Change Notice Issued (← links)
- 05000327/LER-1987-019, :on 870318,operator Observation Discovered That Four Emergency Diesel Generators Started.Caused by Inadequacy of Procedure to Isolate Degraded Voltage Timer Contacts for Functional Testing (← links)
- 05000327/LER-1987-020, :on 840518,nonconformance Rept Written Describing Condition Where Class 1E Electrical Components Found Unprotected Against Potential Water Spray from Failure of Piping.Caused by Inadequate Design (← links)
- 05000327/LER-1999-001-04, :on 990415,exceedance of AOT Occurred Due to Failure of Centrifugal Charging Pump.Rotating Element Was Replaced,Testing Was Completed & Pump Was Returned to Svc (← links)
- 05000327/LER-1986-032, :on 860718,cable Penetration Between Train a & Train B Shutdown Board Room Found Open.Caused by Personnel Error.Personnel Cautioned to Follow Procedures & Fire Barriers Returned to Functional Status (← links)
- 05000327/LER-1986-033, :on 860717,seismic Qualification of Charcoal Filter Trays Not Verified in Listed Sys.Caused by Untraceability of Trays.Qualified Trays Will Be Installed Prior to Start Up (← links)
- 05000327/LER-1988-043, :on 880928,inadequacy of Fire Watch Patrols, Resulting in Noncompliance W/Tech Spec 3.7.12 Occurred. Caused by Lack of Adequate Mgt Oversight.Individual Relieved of Fire Watch Patrol Duty (← links)
- 05000327/LER-1987-017, :on 870306,surveillance Instruction Review Identified Potential Failure to Meet Min Boron Concentrations.Caused by Inadequate Administrative Controls & Analytical Technique.Instructions Revised (← links)
- 05000327/LER-1986-007, :on 860312,testing of Manual Safety Injection Reactor Trip Function Not Performed.Caused by Inadequate Surveillance Instruction.Test Requirements Added to Instruction.Tests Will Be Completed by 860730 (← links)
- 05000327/LER-1988-042, :on 881103,inadvertent Entry in Limiting Condition for Operation 3.0.3 When Main Steam Flow Channel Not Declared Inoperable Occurred.Caused by Operator Oversight.Involved Operators Counseled (← links)
- 05000327/LER-1988-038-01, :on 881014,auxiliary Bldg Isolation Occurred. Caused by Inadequate Procedure Used for Testing Modified Circuitry.Procedure Revised to Reflect Modified Circuitry. Individuals Involved Counseled (← links)
- 05000327/LER-1988-040, :on 881017,discovered That Unit Entered Mode 4 on 880927 w/safety-related Snubber Inoperable.Caused by Personnel Failure to Realize Snubber Disconnected.Event Reviewed W/Planning Personnel (← links)
- 05000327/LER-1988-039, :on 881018,reactor Trip Signal Generated by Reactor Protection Sys When Loop 3 Steam Generator lo-lo Level Signal Generated.Caused by Use of Portable Radio in Containment Fan Room.Alarms Ack & Reset (← links)
- 05000327/LER-1988-041, :on 881018,turbine Trip & Feedwater Isolation Signal Occurred Due to Receipt of hi-hi Level Signal in Loop 1 Steam Generator.Caused by Inadvertent Opening of Loop 1 Valve as Result of Backfilling.Valve Closed (← links)
- 05000327/LER-1986-023, :on 860508,channel Calibr Not Performed for Flow Indicator (Rotometer) on Condensate Demineralizer Regenerate Effluent Line.Caused by Lack of Instruction to Perform Calibr on Indicator (← links)
- 05000327/LER-1987-015, :on 870224,w/units in Mode 5,plant Reactor Engineering Group Notified That Discrepancy Existed Between Point Xenon Model & 3-D Xenon Model.Caused by Inadequate Validation of Model.Corrective Actions Pending (← links)
- 05000327/LER-1987-016, :on 870227,all Four Diesel Generators Started. Caused When Technician Mistakenly Connected Test Jumper on Wrong Pk Block During Function Test of Raw Cooling Water Feeder Breaker.Technician Counseled (← links)
- 05000327/LER-1986-019, :on 860505,auxiliary Bldg Ventilation Isolation Occurred While Mod to 400-volt Shutdown Board 1A1-A Performed.Caused by Personnel Error Causing Loss of Power to Radiation Monitor & Subsequent Spike (← links)
- 05000327/LER-1986-016, :on 860429,max Fuel Rod Weight of 1,766 G U Exceeded for Units 1 & 2 Cycle 3 Reload Assemblies.Caused by Improvements in Fuel Design Including Chamfered Pellets W/ Reduced Dish & Nominal Density Increases (← links)
- 05000327/LER-1986-012, :on 860415,failure to Properly Stroke Time Containment Isolation Valve Noted.Caused by Incorrect Surveillance Requirement Procedure.Procedure Revised & Valves Stroke Timed to Closed Position (← links)
- 05000327/LER-1988-035-01, :on 880927,auxiliary Bldg Isolation Occurred When Operator Inadvertently Tripped Circuit Breaker A. Cause Not Determined.Training Ltr Issued to All Licensed Operators Detailing Event (← links)
- 05000327/LER-1986-031, :on 860714,discovered Inadequate Procedures for Visual Local Stroke Timing of ASME Section XI Valves.Caused by Improper Preparation & Review of Implementing Procedures. Procedures Will Be Revised (← links)
- 05000327/LER-1986-029, :on 850118,ERCW Pump K-A Failed to Meet Acceptance Criteria as Determined by Measured Total Flow Rate & Appropriate Baseline Curve.Caused by Personnel Error. Operating Procedures Will Be Revised (← links)
- 05000327/LER-1988-033-01, :on 881004,unplanned Reactor Trip Signal Generated While Instrument Maint Personnel Performing Channel Calibr on Loop 2 RCS narrow-range Temp Instrument. Caused by Instrument Failure.Signal Reset (← links)
- 05000327/LER-1986-028, :on 860702,discovered Failure to Comply W/Asme Section XI Accuracy & Range Requirements for Instruments Used for Pump Testing.Caused by Personnel Error.Instruments Calibr to Required Accuracy (← links)
- 05000327/LER-1988-034-01, :on 880929,Train B Auxiliary Bldg Isolation Actuation Occurred.Caused by Electrician Inadvertently Bumping Time Delay Relay for Monitor O-RM-90-03.Monitors to Be Blocked When Work Performed (← links)
- 05000327/LER-1987-014, :on 870217,boron Injection Tank Heaters Found Not Verified Operable Every 31 Days.Caused by Procedural inadequacy.SI-16 Revised (← links)
- 05000327/LER-1986-008, :860401,monthly Channel Check for Steam Generator narrow-range Level Shutdown Instrumentation Not Properly Performed on SI-3 Logs.Caused by SI-3 Incorrectly Written for wide-range Level Instruments (← links)
- 05000327/LER-1986-010-01, :on 860406,fuse Inadvertently Dislodged, Starting Diesel Generators 1A-A & 2A-A.Caused When Assistant Unit Operator Attempted to Verify Fuse Size.Procedure Will Be Revised to Add Caution Re Fuse Removal (← links)
- 05000327/LER-1986-009-01, :on 860404,auxiliary Bldg Ventilation Isolation Occurred Due to Loss of Power to Radiation Monitor (RM)-90-101.Caused by Craftsman Contact W/Disconnect Switch. Switch Reclosed (← links)
- 05000327/LER-1986-013, :860403,discovered Inadequate Frequency of Testing of Esf.Caused by Personnel Failure to Write Instructions to Implement Tech Spec Surveillance Requirements (← links)
- 05000327/LER-1986-042, :on 860908,two Tech Spec Surveillance Requirements Not Performed.Caused by Inadequate Procedures. SI-129 Revised to Require Less than 1,700 Psi & Westinghouse cross-calibr Procedure Implemented (← links)
- 05000327/LER-1986-011-01, :on 860328,review of Tech Spec Surveillance Noted That Setpoint for Containment Sump Level in Error as Listed in Limiting Condition for Operation 3.3.2.1.Caused by Error in Instrument Mounting Drawing (← links)
- 05000327/LER-1986-007-01, :on 860312,personnel Notified That Testing of Safety Injection (SI) Reactor Trip Function Not Performed. Testing Will Be Completed by 860430.Subcommittee Formed to Evaluate All Tech Spec Requirements (← links)
- 05000327/LER-1997-014-01, :on 971101,discovered That RCS PORVs Were Not Cycled in Mode 4 as Required by Ts.Caused by Inadequate Procedures.Procedure Revised & Unit Cooled Down to Mode 4 (← links)
- 05000327/LER-1986-027, :on 860603,determined That Surveillance Requirements for Diesel Generators Not Performed as Required Due to Circuit Logic.Sys Design Prevents Performance.Tech Spec Rev Request Resubmitted (← links)
- 05000327/LER-1997-013-02, Forwards LER 97-013-02 Re Addl Conditions Identified During Performance of Corrective Actions.Details Added to Revs for Two Fuses,Not Included in Surveillance Program (← links)
- 05000327/LER-1997-004-02, Forwards LER 97-004-02,identifying Two Addl Molded Case Circuit Breakers That Were Not in Appropriate Surveillance Instructions.Revs Annotated by Vertical Bar in Right Margin (← links)
- 05000327/LER-1986-021, :on 860502,control Room Isolation Occurred Due to Spike on Train B Chlorine Detector.Cause Unknown.Chlorine Detector Reset & Control Room Ventilation Returned to Normal (← links)
- 05000327/LER-1986-020, :on 860501,quarterly Function Test for Sys Generator Blowdown Sys & Condenser Vacuum Exhaust Flow Instrumentation Not Performed.Caused by Not Including Channel in Procedure.Instruction Revised (← links)
- 05000327/LER-1998-004-02, :on 981120,failure to Perform Surveillance within Required Time Interval,Was Determined.Caused by Leaking Vent Valve.Engineering Personnel Evaluated Alternative Methods for Performing Channel Check (← links)
- 05000327/LER-1998-003-04, :on 981109,automatic Reactor Trip Occurred. Caused by Component in Bridge Circuit of Vital Inverter Failed.Inverter Bridge Circuit Replaced (← links)
- 05000327/LER-1990-011, :on 900608,discovered That Intermediate & Power Range Nis Channels Nonconservatively Calibr Following Outage (← links)
- 05000327/LER-1997-008, :on 970322,noted Failure to Properly Perform Surveillance Testing of Containment Air Return Fan Start, Blackout & Auto Sequencing of Station Fire Pumps & Three Functions of Ssps Due to Inadequate Si.Revised Procedures (← links)
- 05000327/LER-1997-008-01, Forwards LER 97-008-01,adding Details to Revised Rept Re Inadequate Surveillance Testing of Three Functions of Solid State Protection Sys.Revs Annotated by Vertical Bar in Right Hand Margin (← links)
- 05000327/LER-1988-023-01, :on 880607,two Containment Ventilation Isolations (Cvis) Occurred.Caused by Inadequate Preparation. CVIs Reset,Work That Initiated CVI Terminated & Std Practice SQM-2 Revised (← links)
- 05000327/LER-1988-004, :on 880111,discovered That 24 Breakers Did Not Adequately Protect 8 Awg & 10 Awg Cables from auto-ignition Temps.Caused by Programmatic Failure to Verify Proper Breaker Characteristic Curve.Breakers Replaced (← links)
- 05000327/LER-1988-044-01, :on 881108,autostart of Turbine Driven Auxiliary Feedwater Pump Occurred.Caused by Loss of Seal Injection Pressure Due to Hotwell Pumps 1B & 1C Tripping. Main Feedwater Pump Trip Signals Reset (← links)
- 05000327/LER-1988-046, :on 881110,Unit 1 Containment Ventilation Isolation Occurred Due to Inadequate Test Recorder Ground Strap Configuration.Containment Ventilation Isolation Reset (← links)
- 05000327/LER-1988-003, :on 880114,both Trains of Auxiliary Bldg Isolation Inadvertently Actuated.Cause Undetermined.Operator Notified Mechanics Working on RM-90-101A Channel & Output Signal Reduced Below High Radiation Setpoint (← links)
- 05000327/LER-1988-022-01, :on 880524,reactor Trip Signals Generated from Electromagnetic Interference.Caused by Welding Machine Operating Near Source Range Nuclear Instrument Cabling. Input Signals Can Be Bypassed (← links)
- 05000327/LER-1988-036-01, :on 881004,reactor Trip Signal Occurred,Caused by Steam Flow to Feedwater Flow Mismatch of Greater than 40% Coincident W/Low Steam Generator Signal Present.Reactor Protection Sys/Esf Calibr Procedure Revised (← links)
- 05000327/LER-1988-019, :on 880424,reactor Trip Signal Generated from Electromagnetic Interference.Caused by Welding Machine Operating at High Frequency Near Source Range Nuclear Instrument Cabling.Signals Can Be Bypassed (← links)
- 05000327/LER-1986-006-01, :on 860318,roving Fire Watch Person Unable to Enter Two Rooms to Check for Fires Due to Inoperable Fire Doors.Caused by Loose Screw in Pull Handle.Door Repaired & Returned to Svc (← links)
- 05000327/LER-1998-003-01, :on 981109,Vital Inverter 1-IV Tripped.Caused by Failed Oscillator Board with Bad Solder Joint,Attributed to Mfg Defect.Replaced Component & Returned Inverter to Operable Status (← links)
- 05000327/LER-1986-017, :on 860419,Surveillance Requirement 4.9.9 Not Adequately Implemented.Caused by Failure of Surveillance Instruction 6.1 to Address Purge Air Exhaust Radiation Monitors (← links)
- 05000327/LER-1986-018-01, :on 860421,surveillance Instruction (SI) Used to Comply W/Action Statement a of Limiting Condition for Operation 3.8.1.1 Failed to Verify Indicated Power availability.SI-7 Revised (← links)
- 05000327/LER-2020-002, Safety Injection Signal with Reactor Trip Caused by a Failure with the Main Turbine Control System (← links)
- 05000327/LER-1988-037-01, :on 880925,unplanned Reactor Trip Signal Due to Simulated Steam Generator Water Level lo-lo Condition.Caused by Failure to Follow Administrative Instruction AI-47.Test Directors Retrained on AI-47 Requirements (← links)
- 05000327/LER-1988-021-01, :on 880523,loss of Operating Train of RHR Sys Occurred.Caused by Opening of Manual Isolation Valve.Train B RHR Pump Stopped by Placing in put-to-lock Condition (← links)
- 05000327/LER-1988-020-01, :on 880512,potential Operation Outside Design Basis Noted.Caused by Unanalyzed Single Failure That Could Cause Inadvertent Actuation of Cold Overpressure Protection Sys During Postulated Main Steamline Break (← links)
- 05000327/LER-1988-032-01, :on 880903,during Calibr of Auxiliary Bldg Vent Radiation Monitor,Auxiliary Bldg Isolation Occurred.Caused by Procedure Inadequacy & Design of Control Circuitry. Handswitch Placed in Correct Position (← links)
- 05000327/LER-1988-016, :on 880324,unplanned Main Steam Line Isolation Signal Occurred.Caused by Inadequate Review of Work Package Issued to Replace Flexible Sense Lines on Transmitter. Content of LER Will Be Reviewed W/Personnel (← links)
- 05000327/LER-1988-014-01, :on 880314,noncompliance W/Configuration Control Requirements Following post-mod Test of Radiation Monitor Resulted in Containment Ventilation Isolation.Caused by Personnel Error.Personnel Counseled (← links)
- 05000327/LER-1988-031-01, :on 880908,hourly Fire Watch Through 669 Ft Elevation of Auxiliary Bldg Suspended Due to Unexpected Increase in Airborne Radioactivity.Personnel Evacuated Until Airborne Levels Decreased (← links)
- 05000327/LER-1988-019-01, :on 880424 & 0502,reactor Trip Signals Generated from Source Range Nuclear Instrument Channel Spike.Caused by Noise Induced Operation of Welding Machine at High Frequency (← links)
- 05000327/LER-1988-018-01, :on 880411,first Out Reactor Trip Annunciator Received Twice But No Reactor Trips Occurred.Caused by Inadequate Posting of Signs Prohibiting Use of Portable Radios in Accumulator Rooms.Addl Signs Posted (← links)
- 05000327/LER-1985-046, :on 851118,high Pressure Fire Protection Valve Inadvertently Opened & Changed Fire Hose Stations.Caused by Failure to Comply W/Tech Specs & Personnel Error Re Header. Header & Hose Stations Returned to Svc (← links)
- 05000327/LER-1988-030-01, :on 880806,radiation Monitor Input Inadvertently Grounded to Solid State Protection Sys Causing Containment Ventilation Isolation.Caused by Personnel Error. Design Change Issued to Relabel Cables (← links)
- 05000327/LER-1988-029-01, :on 880804,load Shedding Occurred on 6.9 Kv Shutdown Board During Performance of Workplan 7152-01.Caused by Defective Workplan.Workplan Rewritten & Event Reviewed W/ Mod Engineer (← links)
- 05000327/LER-1985-004, :on 850116,Surveillance Instruction SI-261, Visual Insp of Fire Doors, Not Performed within Tech Spec Time Limits.Caused by Addl Deficiencies Inadvertently Omitted from Rept.Instruction Performed (← links)
- 05000327/LER-1985-044-01, :on 851025 & 1108,safety Injection Pumps Flow Rate Failed to Meet Criteria of Tech Specs.Caused by Personnel Error.Westinghouse Recommendations for Determining Compliance Incorporated Into Instruction (← links)
- 05000327/LER-1988-028-01, :on 880723,hourly Fire Watch Patrol Through 734 Ft Elevation of Auxiliary Bldg Could Not Be Completed. Caused by High Level Airborne Radioactivity on Bldg.Plant Operators Manually Initiated Treatment Sys (← links)
- 05000327/LER-1988-017, :on 880331,Train a Containment Ventilation Isolation Occurred.Caused by Improperly Controlling Operation of Sample Pump Local Switch.Local Sample Pump Switch Will Be Replaced Prior to Mode 4 (← links)
- 05000327/LER-1988-011, :on 880216,both Trains of Control Room Emergency Ventilation Sys Inoperable.Caused by Inadequate Review of Applicable Tech Specs Before Removing Generator from Svc.Diesel Generator Returned to Svc (← links)
- 05000327/LER-1988-027, :on 880714,discovered Incorrect Source Strength Evaluation Date on Surveillance Instructions for Channels. Caused by Inadequate Checklist in App F of Surveillance Instruction SI-1.Instruction Will Be Revised (← links)
- 05000327/LER-1987-078, :on 871221,inadequate Procedure for RCS Chemical Addition Resulted in Noncompliance W/Tech Spec Action Statement.Procedures Revised to Provide Instructions for RCS Chemical Addition (← links)
- 05000327/LER-1987-001-01, Informs of Complete Implementation of Recurrence Control Commitment Re LER 87-001-01, Trip Setpoint for Acbs on Shutdown Boards That Feed Control & Auxiliary Bldg Vent Boards Incorrect Due to Design Error (← links)
- 05000327/LER-1988-018, :on 880411,incomplete Posting of Signs Resulted in Radio Transmission Interference & Reactor Trip Signal. Caused by Use of Portable Radio in Accumulator Room 4. Reduction of Radio Power Under Review (← links)
- 05000327/LER-1981-023-03, /03L-1:on 810303,four Undersized Pipe Sleeves Associated W/Seal Injection Water Lines to Reactor Coolant Pumps Identified.Caused by Incorrect Installation.Workplan 9073 Issued to Reshape Subj Piping Sleeves (← links)
- 05000327/LER-1997-010-01, :on 970626,failure to Properly Return Portion of Fire Protection Sys to Svc Following Mod Activities Was Noted.Caused by Failure to Follow Procedures.Manual Isolation Valve Was Opened (← links)
- 05000327/LER-1988-026-01, :on 880629,unit in Mode 5 When Diesel Standby Generators Received Emergency Start Signal.Caused by Undervoltage Condition on 6.9 Kv Shutdown Board 1B-B721 Resulting from Feeder Breaker Trip (← links)
- 05000327/LER-1988-010, :on 880205,procedure Governing Stroke Time Testing for motor-operated Valves Determined Inconsistent W/ Design Criteria for ESF Actuated Valves.Max Allowable Stroke Time Corrected as Specified by SI-166 (← links)
- 05000327/LER-1988-025-01, :on 880617,two Spurious Steam Generator 3 hi-hi Level Turbine Trip First Out Annunciations Received.Caused by Steam Generator Tube Leak Testing.Precaution Added to Special Maint Instruction 0-68-2 (← links)
- 05000327/LER-1988-024-01, :on 880615,unplanned Reactor Trip Signal Generated Due to Simulated Undervoltage Condition.Caused by Inadequate Impact Evaluation.Work Control Group at Plant Restructured (← links)
- 05000327/LER-1987-006-01, :on 870124,operation of All Equipment Affected by Safety Injection Test Signal Not Verified.Caused by Deficient Surveillance Instructions SI-26.1A & SI-26.2A. SI-26.1A & SI-26.2A Revised (← links)
- 05000327/LER-1988-008-01, :on 880130,discovered Essential Raw Cooling Water Sys Effluent Line Radiation Monitor Inappropriately Declared Operable & Tech Spec Action Statement Exited Prematurely.Caused by Personnel Error (← links)
- 05000327/LER-1988-001, :on 880111,four Emergency Diesel Generators Declared Inoperable Due to Interval for Tech Spec Surveillance Requirement 4.8.1.2 Exceeded.Caused by Oversight During Rev of Computer Program.W/Undated Ltr (← links)
- 05000327/LER-1988-005, :on 880116,turbine Bldg Sump Release Line Radiation Monitor Inappropriately Declared Operable on 880115 Resulting in Failure to Take Grab Samples for 25.5 H. Caused by Operator Error.Grab Samples Resumed (← links)
- 05000327/LER-1988-015, :on 880317,Tech Spec Surveillance Requirement Not Completely Incorporated Into Implementing Procedure. Caused by Incomplete Procedure Review.Surveillance Instruction 410.2 Revised (← links)
- 05000327/LER-1997-009-02, :on 970521,failed to Perform Response Time Testing of Containment Radiation Monitor Following Maint Activities.Caused by Misinterpretation of Surveillance Requirements.Tested Radiation Monitor (← links)
- 05000327/LER-1988-013, :on 880314,four Steam Generator Blowdown Sys Radiation Monitors Discovered Inadequately Tested.Caused by Oversight During Implementation of Surveillance Instruction Review Program.Tests Satisfactorily Completed (← links)
- 05000327/LER-1987-074, :on 871222,identified That Emergency Procedures Do Not Adequately Address Opening Certain High Head Safety Injection Valves After Accident in Hot Shutdown.Caused by Inadequate Procedure.Investigation Continuing (← links)
- 05000327/LER-1980-182, Forwards LER 80-182/03L-0 (← links)
- 05000327/LER-1988-012, :on 880301,ESF Actuation Containment Ventilation Isolation Occurred.Caused by Prefilters Clogging Due to Suspended Particulate Near Radiation Monitor. Prefilter Change Frequency Increased (← links)
- 05000327/LER-1997-007-01, :on 970404,DG Started When Drill Bit Being Used to Drill Into Electrical Panel in Main Control Room,Cut Into Cable.Caused by Drill Bit Penetrating Energized Wire Bundle Causing Short.Work Stopped on All Electrical Mods for S (← links)
- 05000327/LER-1988-009, :on 880204,discovered That Inaccurate Primary to Secondary Leak Rates Measurements Resulted in Potential Noncompliance W/Limiting Condition for Operation.Caused by Inadequate Procedure.Procedure Revised (← links)
- 05000327/LER-1988-006, :on 880127,containment Ventilation Isolation Occurred.Caused by Instrument Maint Technician Inadvertently Removing Incorrect Radiation Monitor Module.Technician Counseled (← links)
- 05000327/LER-1987-076, :on 871206,containment Ventilation Train a Isolation Occurred.Caused by Incorrect Terminals Being Connected Per Incorrectly Written Work Request B244973. Procedures Revised & Personnel Counseled (← links)
- 05000327/LER-1986-002-03, :on 860212,during Calibr of Control Bldg HVAC Sys,Isolation of Train B of Main Control Room Ventilation Sys Occurred.Caused by Personnel Error.Overtemp Switch (OTS)-311-5B Calibr & Returned to Svc (← links)
- 05000327/LER-1986-003-02, :on 860220,during Surveillance of 120-volt Ac Inverters,Personnel Tripped Wrong Breaker,Causing Auxiliary Bldg Ventilation Isolation (Abi).Caused by Personnel Error. Abi Reset.Procedure Revised (← links)
- 05000327/LER-1986-005, :on 860218,0301 & 05,fire Watch Personnel Unable to Complete Tech Spec Action Statement & Fire Watch Not Initiated.Caused by Inoperable Door & Personnel Error. Brass Screws on Fire Doors Will Be Replaced (← links)
- 05000327/LER-1985-025, :on 850601,noble Gas Sample Not Taken at Required Frequency.Caused by Analyst Failure to Collect Sample Every 8 H.Analyst Counseled & Sample Taken (← links)
- 05000327/LER-1985-023, :on 850530,inadvertent Auxiliary Bldg Ventilation Isolations Occurred.Caused by Electromagnetic Interference on Spent Fuel Radiation Monitors & Personnel Error.No Radiation Levels Above Normal Found (← links)
- 05000327/LER-1986-004-01, :on 860111,person Entered Floor Drain Collector Tank Room W/O Signing in & Completing Radiation Work Permit. Clothing Contaminated.Caused by Faulty Barricade.Metal Door Will Be Installed (← links)
- 05000327/LER-1986-005-01, :on 860218,0301 & 05,fire Watch Could Not Enter Applicable Rooms to Check for Fires Due to Inoperable Fire Doors.Caused by Faulty Screw.On 860303,fire Watch Not Initiated Due to Personnel Error (← links)
- 05000327/LER-1985-039-01, :on 851010,containment Ventilation Isolation Occurred.Caused by Instrument Mechanic Mistakenly Running Test on Incorrect Radiation Monitor.Mechanic Counseled. Disciplinary Action Will Be Taken (← links)
- 05000327/LER-1985-040, :on 851009,trains Became Inoperable Due to Air Injection Into Suction of Pumps During Swap Over from Train B to a Rhr.Caused by Procedure Inadequacy.Pumps Shutoff & Vented.Rcs Level Increased.Valves Verified (← links)
- 05000327/LER-1997-001-02, :on 970125,failed to Perform Surveillance Testing on EDG Start Timer Relays Contained in Start Logic Circuitry.Caused by Inadequate Surveillance Procedures. Revised Procedures & Performed Testing (← links)
- 05000327/LER-1985-046-01, :on 851118,annulus Fire Hose Stations Found Isolated.Caused by Unit Operator 851114 Erroneous Isolation of Header After Inadvertent Opening of Containment High Pressure Fire Protection Valve.Header Restored (← links)
- 05000327/LER-1997-006-01, :on 970322,failed to Perform Surveillance Requirement During Containment Entry Due to Personnel Error. RWP Was Closed to Prevent Further Use (← links)
- 05000327/LER-1997-005-01, :on 970319,two of Six Tested Main Steam Safety Relief Valves Not within TS Setpoint Tolerance.Appropriate LCOs Entered & Valves Found Outside TS Setpoint Tolerance Adjusted to within TS Tolerance & Retested (← links)
- 05000327/LER-1985-045-01, :on 851031,diesel Generator Start & Train B Auxiliary Bldg Isolation Occurred.Caused by Bent Racking Lever in Start Bus 1B Alternate Feeder Breaker Racking Mechanism.Lever Straightened (← links)
- 05000327/LER-1985-037-01, :on 850906,main Control Room Ventilation Isolation Occurred Due to Spike on Radiation Monitor (RM) RM-90-125.Caused by RM Controller Either Placed in Trip Ref Mode or Momentary Loss of Power (← links)
- 05000327/LER-1985-034-01, :on 850827,diesel Generator 2B-B Performed Incorrectly During Surveillance.Caused by Loose Electrical Connector Between Control Panel & Hydraulic Actuator on Engine Governor.Connector Tightened (← links)
- 05000327/LER-1997-003-02, :on 970305,failed to Properly Perform Surveillance Testing on Centrifugal Charging Pump Inlet Isolation Valve Logic.Caused by Inadequate Surveillance Instruction.Prepared Special Test Procedure (← links)
- 05000327/LER-1985-033-01, :on 850827,during Weekly Train B Chlorine Detector Function Testing,Esf Actuation Occurred for Main Control Room Isolation.Caused by Personnel Error.Personnel Counseled (← links)
- 05000327/LER-1985-043-01, :on 851023 & 24,centrifugal Charging Pumps 1A-A & 1B-B Tested & as-found Failed to Meet Acceptance Criteria of Tech Spec 4.5.2.h.2.a.Probably Caused by Observed Degradation of Pumps (← links)
- 05000327/LER-1985-042, :on 851020,containment Ventilation Isolation Occurred.Caused by Electrical Failure of Train B Purge Air Exhaust Radiation Monitor Recirculation Pump Motor.Impeller Pump Vanes & Motor Replaced (← links)
- 05000327/LER-1997-002-01, :on 970214,TS AOT Exceeded for DG 2A-A.Caused by Mechanical Failure of DG 2A-A Governor Actuator on Engine 2.DG 2A-A Governor Actuators on Both Engines Replaced, Functional Tested & PMT Performed (← links)
- 05000327/LER-1985-051, :on 851206,hourly Fire Watches Not Performed as Required by Tech Spec 3.7.12.Caused by Decision Not to Enter Contaminated Area Due to Time Needed for Full Dress Out Entry.Fire Watch Reestablished (← links)
- 05000327/LER-1985-041-01, :on 851014,inadvertent Start of Diesel Generator Occurred.Caused by Dislodged Fuse.Diesel Generator Shut Down.Caution Placed in Standby Power Checklist (← links)
- 05000327/LER-1985-048-01, :on 851206,Maint Std Practices SQM-2 & SQM-57 Improperly Reviewed by Plant Operations Review Committee. Caused by Staff Error Due to Belief That Compliance W/Tech Specs Met.Procedures Reviewed (← links)
- 05000327/LER-1985-047-01, :on 851205,keys to Locks to High Radiation Areas Not Administratively Controlled by Shift Engineer &/Or Health Physicist.Several Employees Retained Keys from Same Type Locks at Browns Ferry.Locks Changed (← links)
- 05000327/LER-1985-050-01, :on 851207,containment Ventilation Isolation Occurred from Loss of Power to Upper Compartment Containment Radiation Monitor.Caused by Dirty Connector Pins on Power Supply Module.Connector Pins Cleaned (← links)
- 05000327/LER-1985-049-02, :on 851206,waste Gas Hydrogen & Oxygen Analyzer Monthly Functional Test Not Performed in Oct.Caused by Scheduling Methods Utilized.Scheduling Method Improved to Prevent Recurrence (← links)
- 05000327/LER-1985-032-01, :on 850816,both Trains of Emergency Gas Treatment Sys Declared Inoperable Due to Failure to Meet Environ Qualification for Instrumentation.Setpoint Change Initiated (← links)
- 05000327/LER-1985-031-01, :on 850729,auxiliary Bldg Isolation Occurred Due to High Radiation Indicated by Stack Ventilation Monitor.Caused by Leaking Weld at Sample Line Connection Upstream of Valve 62-674.Lines Replaced (← links)
- 05000327/LER-1995-001-01, :on 950118,accumulation of Gas in Residual Heat Removal Sys.Caused by Normal Leakage from Cold Leg Accumulators.Performed Monitoring & Venting of Gas Accumulation & Revised Quarterly Pump Tests (← links)
- 05000327/LER-1985-030-01, :on 850721,ESF Actuations for Auxiliary Feedwater Pump Start Occurred Due to Loss of Both Main Feed Pumps & hi-hi Level in Generator Loop 4.Caused by Failed Condensate Dump Back Valve (← links)
- 05000327/LER-1984-045, :on 840625,auxiliary Control Air Compressor A-A Taken Out of Svc.On 840709,compressor B-B Removed from Svc. Power Reduction to Mode 3 Initiated But Stopped When Compressor B-B Returned to Svc (← links)
- 05000327/LER-1985-029-01, :on 850719,trip Occurred on lo-lo Steam Generator Level in Loop 3.Caused by Power Loss to Feedwater Pump When Attempting to Transfer Power from Electrical Board.Operators Made Aware of Problems (← links)
- 05000327/LER-1985-038, :on 850908,auxiliary Bldg Ventilation Isolation Occurred Due to Spike on Spent Fuel Pool (SFP) Radiation Monitor.Caused by Increase in Radiation Level Due to Removal of SFP Filter from Svc (← links)
- 05000327/LER-1983-093-03, /03L-1:on 830706,condenser Vacuum Flow Rate Monitor 2-FT-2-257 Declared Inoperable Due to Loss of Readings.Caused by Condensation in Sense Lines at Flow Element.Annubar Flow Element Will Be Replaced (← links)
- 05000327/LER-1985-028, :on 850704,hourly Fire Watch for Addl Equipment Bldg Not Conducted Because Door A-183 Would Not Open.Caused by Loose Screws Holding Latch Mechanism Together.Defective Parts Corrected (← links)
- 05000327/LER-1996-012-01, :on 960330,two Cold Leg Accumulator Sample Isolation Valves & Missing Data Sheet in Surveillance Package Were Inoperable.Caused by LCO Not Being Entered. Isolation Valves Were Tested (← links)
- 05000327/LER-1985-027-01, :on 850625,main Steam Line Isolation Occurred. Caused by Coincident Logic on High Steam Line Flow Monitoring Sys.Setpoint of Ref Controller PC-1-73 Recalibr (← links)
- 05000327/LER-1985-036-01, :on 850825,26,28 & 0913,hourly Fire Watch Not Performed within 1 H.Caused by Improper Shift Relief or Inaccessibility to Areas.Fire Watches Reestablished as Soon as Practical (← links)
- 05000327/LER-1996-010-01, :on 961116,manual Reactor Trip Occurred.Caused by Unexpected Feedwater Heater Isolation.Informed Personnel of Effects Changing Proportional Band on Operating Range of Associated Valve Controllers (← links)
- 05000327/LER-1985-035-01, :on 850829,control Power for Diesel Generator 2B-B Lost for Several Seconds.Caused by Personnel Error Resulting in Loose Connector from Test Rig to Breaker Lugs. Suction Valves Returned to Normal (← links)
- 05000327/LER-1996-011-01, :on 961118,discovered Rod Position Indication Sys Was Out of Step W/Demand Position Indication Sys.Caused by Incorrect Position Indication on Analog Rod Position. Began Dilution of Reactor Coolant Sys (← links)
- 05000327/LER-1985-026, :on 850611,feedwater Isolation Occurred Due to high-heat Steam Generator Level.Caused by Low Operating Temp When Steam Generator Valve Opened.Instruction Used to Open Valves at Pressure Revised (← links)
- 05000327/LER-1983-049-03, /03L-1:on 830324,ice Condenser Intermediate Deck Door Found Frozen Closed During Routine Insp.Caused by Water Dripping from Condensate Drain Pan Due to Heater Mat Failure.Ice Removed & Heater Mat Replaced (← links)
- 05000327/LER-1983-166-03, /03L-1:on 831115,primary Containment Internal Pressure Relative to Annulus Increased Above 0.3 Psig.Caused by Operator Error.Containment Vented to Reduce Pressure & Relocation of Indicator Being Evaluated (← links)
- 05000327/LER-1985-017, :on 850422 & 0506,inadvertent Auxiliary Bldg Isolations (Abis) Occurred.Caused by electro-magnetic Frequency Feedback from Welding Activities.Abi in Both Events Reset (← links)
- 05000327/LER-1985-022-01, :on 850617 & 22,hourly Fire Watches Not Conducted.Caused by Delay in Revising Fire Watch Check Sheets & Problem W/Card Reader Access Program,Respectively. Fire Watch Established (← links)
- 05000327/LER-1981-053-03, /03L-1:on 810503,liquid Radwaste Effluent Monitor O-RM-90-122 Failed to Source Check.Caused by High Background Accumulation in Sample Chamber Due to Failure to Change Out Chamber.Chamber Coated W/Epoxy Paint (← links)
- 05000327/LER-1985-024, :on 850524,fire Watch for Supply Air Fan Room Not Conducted Because Door A-123 Inoperable.Caused by Broken Door Handle.Defective Parts Replaced & Hourly Fire Watch Resumed (← links)
- 05000327/LER-1992-018, :on 921026,reactor Tripped Due to Turbine Trip. Caused by hi-hi Feedwater Level in SG 3 & Failure in automatic-manual Switching Relay.Unit Stabilized in Hot Standby & Relays Replaced (← links)
- 05000327/LER-1985-021, :on 850523,inadvertent Main Control Room Ventilation Isolation Occurred.Caused by Bad Power Supply on Radiation Monitor.Power Supply Replaced & Monitor Returned to Svc (← links)
- 05000327/LER-1985-019, :on 850524,design Review Revealed That During Seismic event,1-inch Demineralized Water Pipe & High Pressure Fire Protection Header Could Have Failed. Demineralized Water Pipe Isolated for Repair (← links)
- 05000327/LER-1992-025, :on 921215,nonessential Control Air Isolation from Svc Air Alarm Received in Main Cr,Resulting in Closure of Containment Isolation Valves.Caused by Loss of Air Pressure.Air Compressor Switch Replaced (← links)
- 05000327/LER-1992-024, :on 921212,discovered That Continuous Fire Watch Had Not Been Established within Required Timeframe Due to Inattention to Detail by Fire Operator.Individuals Were Counseled on Importance of Attention to Detail (← links)
- 05000327/LER-1985-020, :on 850514,both RHR Trains Inadvertently Isolated by Closure of Train B Suction Valve.Caused by Work Performed on Reactor Vessel Level Instrumentation Sys to Refill Sense Lines.Suction Reestablished (← links)
- 05000327/LER-1992-023, :on 921201,determined That Ice Condenser Had Operated Below Required 993 Pound Design Analysis,Due to an Inadequate as-left Surveillance Test.Ice Condenser Ice Bed Will Be Revised to Maintain Design Assumption (← links)
- 05000327/LER-1992-020, :on 921119,discovered That Fire Watch Patrol Was Not Performed within Timeframe Required.Caused by Personnel Splitting One Fire Watch Route.Addl Fire Protection Related Records Were Reviewed (← links)
- 05000327/LER-1992-021, :on 921120,failure to Verify Valve Positions for Verification of Containment Integrity Noted.Caused by Inappropriate Waiver of SI Steps as Result of Inadequate Procedure.Procedure Revised (← links)
- 05000327/LER-1992-022, :on 921122,CREVS Declared Inoperable Because of Closure of Tornado Dampers.Caused by Tornado Warning & Sighting of Tornado Moving Toward Snp.Corrective Actions Not Applicable (← links)
- 05000327/LER-1992-019, :on 921106,discovered That Certain TS Radiation Monitors Could Have Setpoints Calculated in Nonconservative Manner.Caused by Personnel Error.Vacuum Readings Recorded Every 4 H (← links)
- 05000327/LER-2019-003-01, 1 for Sequoyah Nuclear Plant, Unit 1, Automatic Reactor Trio Due to Negative Rate Trip as a Result of a Dropped Control Rod (← links)
- 05000327/LER-1991-009, :on 910506,LCO 3.7.11.1 Entered When Fire Suppression Sys for Auxiliary Bldg Declared Inoperable. Caused by Inability of HPFP Sys to Pass Periodic Surveillance Test.Wr Initiated (← links)
- 05000327/LER-1992-016, :on 920819,LCO 3.0.3 Entered for 18 Minutes When Both CREVS Trains Taken Out of Svc to Replace Inlet Damper in Each Train.Caused by Bypass Leakage Through Existing Dampers.Both Dampers Replaced (← links)
- 05000327/LER-1985-014, :on 850404,during Calibr of Auxiliary Bldg Stack Radiation Monitor O-RM-90-101,inadvertent Auxiliary Bldg Isolation Occurred.Caused by Personnel error.SI-82 Revised to Ref 10 Time Delay for Channels (← links)
- 05000327/LER-1985-015, :on 850404,hourly Fire Watch for Auxiliary Bldg Supply Air Fan Room Not Conducted.Caused by Inoperable Door. Door repaired,post-maint Check Made & Fire Watch Reestablished (← links)
- 05000327/LER-1996-009-01, :on 960718,auxiliary Building Secondary Containment Boundary/Fire Barrier Not Maintained as Required by Design.Caused by Failure to Follow Design Control Process (← links)
- 05000327/LER-1985-004-01, :on 850116,surveillance Instructions (SI) on Fire Doors Not Performed within Tech Spec Time Limits.Caused by Personnel Error.Ltr Written to Personnel Stressing Correct Performance of SIs (← links)
- 05000327/LER-1996-008-01, :on 960709,failed to Perform Quarterly Backseat/Closure Test on Five Check Valves.Caused by Personnel Error.Test Procedure Written & Performed on Subject Check Valves (← links)
- 05000327/LER-1985-013, :on 850321,on Seven Separate Occasions,Hourly Fire Watch Not Performed Due to Doors Failing in Closed Lock Condition.Caused by Equipment Failure.Fire Watches Reestablished After Doors Repaired (← links)
- 05000327/LER-1996-006-02, :on 960623,failed Coupled Capacitor Potential Device Caused Actuation of Generator Backup/Transfomer Feeder Relay Tripping Turbine & Reactor.Removed & Replaced Ccpd (← links)
- 05000327/LER-1996-007-01, :on 960614,rod Position Indicators for Control Bank D Rods M4 & M12 More than Required 12 Steps Out from Respective Demand Position Indicators.Caused by Incorrect Position Indication on Rod.Response Reduced (← links)
- 05000327/LER-1995-010, :on 950717,turbine & Reactor Trips Occurred. Caused by Bellows Being Deformed When Sudden Pressure Relay Is Isolated & Heated.New Qualitrol Relays Installed & Placed in Service (← links)
- 05000327/LER-1992-015, :on 920728,discovered That Configuration of Air Supplies & Solenoids for Containment Vacuum Relief Isolation Valves Could Result in Loss of Automatic Closure. Night Order Issued to Remove Fuses (← links)
- 05000327/LER-1992-013, :on 920715,determined That Mass Energy Releases Used for Main Steam Line Break Not Conservative.Caused by Perfect Moisture Separation Assumed in Main Steam Line Break Analysis.New Design Basis to Be Developed (← links)
- 05000327/LER-1996-005-02, :on 960526,ESF Actuation Occurred Resulting in DG Start.Cause Unknown.Diagnosed Condition,Reset Start Signal & Secured Actuated Equipment (← links)
- 05000327/LER-1996-004-02, :on 960509,normal Feeder Breaker Unexpectedly Tripped,Resulting in Loss of Power Signal & Start of Four Dgs.Caused by Failure of Breaker Mechanism.Spare Breaker Operating Mechanism Refurbished & Installed (← links)
- 05000327/LER-1984-074, :on 841218,interactions Found That Were Not in Compliance W/App R of 10CFR50.Schedule for Corrective Actions Will Be Submitted by 850101.Fire Watches Will Continue Until Compliance Achieved (← links)
- 05000327/LER-1984-075, :on 841201,hourly Fire Watch Route C Not Performed as Required by Tech Spec 3.7.12.Replacement for Personnel Normally on Fire Watch Route C Did Not Show Up for Work.Fire Watch C Reestablished (← links)
- 05000327/LER-1984-073, :on 841212,110 Fire Doors Failed to Meet Ul Stds.Caused by Maint & Mods Performed on Doors.Fire Watches Set Per Tech Specs & Mod/Repair Schedule & long-term Maint Being Addessed (← links)
- 05000327/LER-1984-065, :on 841009,two Auxiliary Bldg Isolation Events Occurred.Caused by Mops & Buckets Carried Too Close to Spent Fuel Pool Radiation Monitor.Signals Reset.Personnel Counseled (← links)
- 05000327/LER-1984-067, :on 841022,listed safety-related Sys Interactions Found Not in Compliance W/App R of 10CFR50.Fire Watches Established.Implementation Schedule for Corrective Actions Will Be Submitted by 850101 (← links)
- 05000327/LER-1985-010, :on 850201,containment Ventilation Isolation Occurred on Train B Valves to Upper & Lower Containment Radiation Monitors RM-90-106 & 112.Caused by Failure of Power Supply.Power Supply Replaced (← links)
- 05000327/LER-1985-007, :on 850131,while Performing Surveillance Instruction 166.21,Train B Emergency Gas Treatment Sys Room Cooler Would Not Start.Caused by Blown Control Fuse.Fuse Replaced (← links)
- 05000327/LER-1996-003-01, :on 960325,failure to Perform Surveillance Requirements for Penetration Fire Barrier Insps as Required by Tech Specs Occurred.Caused by Personnel Error.Appropriate Disciplinary Action Taken W/Individuals (← links)
- 05000327/LER-1984-063, :on 841018,noncompliance of safety-related Sys w/10CFR50,App R Noted.No Cause Stated.Fire Watches Utilized. Implementation Schedule of Corrective Actions Expected by 850101 (← links)
- 05000327/LER-1984-061, :on 840927,RCS Pressurizer Relief Tank Pressure Indicators Had Wrong Pressure Range.Cause Not Stated.Instrument Ranges Will Be Reviewed to Ensure Agreement W/Tech Specs (← links)
- 05000327/LER-1984-059, :on 841009,insp Identified Various safety-related Sys Not in Compliance W/App R of 10CFR50. Cause Not Stated.Portable Lighting Supplied Outside Main Control Room for Use by Operators (← links)
- 05000327/LER-1985-008, :on 850120,21 & 23,hourly Fire Watch Not Performed.All Fire Watches Immediately Reestablished or Completed Upon Detection of Missed Fire Watch (← links)
- 05000327/LER-1985-006, :on 850120,Limiting Condition for Operation (LCO) 3.3.1.1 Entered Due to Loss of Feedwater Channel. Caused by Frozen Sense Line.On 850121,second Channel Became Inoperable for Same Reason & LCO 3.0.3 Entered (← links)
- 05000327/LER-1984-030, :on 840419,high Pressure Connection on Thimble Tube at Seal Table Failed,Resulting in RCS Pressure Boundary Leak & Ejection of Thimble Tube.Caused by Unusual Forces on Assembly by Cleaning Fixture (← links)
- 05000327/LER-1984-062, :on 840918,two Control Room Ventilation Isolations Occurred.Caused by Personnel Error When Test Switch on Chlorine Detector Actuated & Capacitor Lead Loosened,Respectively (← links)
- 05000327/LER-1984-060, :on 840921,23,24,28,29 & 30,auxiliary Bldg Isolations Occurred.Caused by Spikes on Spent Fuel Pool Radiation Monitors.Signal Reset.Spent Fuel Pool Water Cleaned (← links)
- 05000327/LER-1985-001, :on 850109,Surveillance Instruction 143, Control Bldg Emergency Air Cleanup Sys Filter Train Test, Not Performed within Tech Spec Time Limits.Surveillance Instruction Completed Satisfactorily on 850109 (← links)
- 05000327/LER-1984-058, :on 840917,high Radiation Alarm Actuated, Causing Containment Ventilation Isolation to Occur.Caused by Electromagnetic Interference Generated by Flow Alarm Touched Off by Steam Generator Leak (← links)
- 05000327/LER-1992-014, :on 920810,1B-B Safety Injection Pump Tripped During Quarterly Surveillance Due to Associated Circuit Breaker Being Nonfunctional.Procedural Revs Will Be Performed to Ensure Proper Breaker Alignment (← links)
- 05000327/LER-1985-003, :on 850104,Tech Spec Max Allowable Surveillance Instruction Performance Date Exceeded by 52 Days.Caused by Miscalculation of Date.Use of Std Form to Calculate & Document Max Allowable Dates Initiated (← links)
- 05000327/LER-1984-072, :on 841207,functional Discrepancy for post- Accident Radiation Monitors for Reactor Coolant Drain Tank Discharge Piping Identified.Caused by Incorrect Drawings. Monitors Revised (← links)
- 05000327/LER-1984-071, :on 841121,radiation Monitors for Containment Ventilation Isolation Not Adequately Verified.Caused by Misinterpretation of Surveillance Requirement.Surveillance Instruction 6 Will Be Revised (← links)
- 05000327/LER-1992-007, :on 920316,identified That Several Ice Condenser Inlet Doors on Unit 2 Were Inhibited from Opening. Caused by Failure to Install Sealant Matl in Wear Slab Joints.Unit 1 Shutdown Initiated (← links)
- 05000327/LER-1992-012, :on 920516,unit Manually Tripped from 82% Power as Result of Condensate & Feedwater Transient & Secondary Sys Perturbation.Caused by Loss of Both Heater Drain Tank Pumps.Control Valve Returned to Svc (← links)
- 05000327/LER-1996-002-01, :on 960215,SRs Associated W/Fire Protection Hose Stations Not Performed as Required by Ts.Caused by Inadequate Procedure Rev.Entered Action of LCO & Established Measures to Address Issue (← links)
- 05000327/LER-1992-011, :on 920429,unit Experienced Safety Injection Signal While Preparing for Reactor start-up.Caused by Failure in steam-dump Control Circuitry.Equipment That Caused Actuation of steam-dump Valves Replaced (← links)
- 05000327/LER-1992-010, :on 920428,turbine Tripped as a Result of a Loss of Load.Caused by Failure of Sudden Pressure Switch. Personnel Diagnosed Plant Condition & Took Actions (← links)
- 05000327/LER-1985-012, :on 850312,hourly Fire Watch Not Performed within 1 H,Per Tech Spec 3.7.12.Caused by Inoperable Door. Door Repaired & Fire Watch Reestablished (← links)
- 05000327/LER-1996-001-02, :on 960121,discovered Fire Watch Patrol Did Not Patrol Some Assigned Areas in Control Bldg & on 960126,fire Watch Patrol Not Performed within Timeframe Required by Ts. Appropriate Disciplinary Action Taken (← links)
- 05000327/LER-1984-068, :on 841104,inadvertent Relay Actuation Caused Auxiliary Bldg Ventilation Isolation.Caused by Relay Not Fully Seated on Terminal Block.Relay Placed Back Into Correct Position.Isolation Reset (← links)
- 05000327/LER-1984-055, :on 840817 & 20,during Work on Storage Facility for Plant Maint Insulators,Doors A028 & A029 Left Open. Caused by Personnel Failure to Realize Outer Door Part of Vital Area Boundary.Procedure Revised (← links)
- 05000327/LER-1984-069, :on 841023,ERCW Valve FCV-67-66 to Diesel Generator Found Closed W/Thermal Overload Not Reset.Caused by Error in Surveillance Instruction.Thermal Overload Reset & Valve Operated Correctly (← links)
- 05000327/LER-1985-011, :on 850206,08,12,13,15 & 28,hourly Fire Watch Not Performed within 1 H.Caused by Equipment Failures. Equipment Repaired & Fire Watches Completed 3 H After Last Watch (← links)
- 05000327/LER-1984-066, :on 841009,breaker Manually Opened W/O Supplying Alternate Power to Loads,Resulting in Loss of Control Power to Diesel Generator 2A-A Emergency Start Relay.Caused by Personnel Error.Breaker Closed (← links)
- 05000327/LER-1985-009, :on 850128,rod Position Indication Sys Misaligned Beyond Tech Spec Limits.Caused by Puddles of Water Beneath Solatron Line Voltage Regulator.Sys Returned to Svc After Moisture Dissipated (← links)
- 05000327/LER-1992-009, :on 920416,transient Induced or Spurious Mitigating sys-actuation Circuitry Signal & Loss of Offsite Power Experienced.Caused by Incorrect Location of AMSAC Circuitry in AFW Pump.Criteria Revised (← links)
- 05000327/LER-1984-052, :on 840817,during Review of Procedure SI-144.2, Control Room Emergency Ventilation Sys Test, Discovered That Incorrect Calculation of Duct Area Resulted in Both Trains of Sys Left Lower than Specs (← links)
- 05000327/LER-1984-050, :on 840807,spurious Signal from Chlorine Detector Caused Control Room Isolation to Occur.Possibly Caused by Inadvertent Actuation of Reset Button on Analyzer Panel.Detector Returned to Svc (← links)
- 05000327/LER-1995-019, :on 951225,manual Reactor Trip Occurred as Result of Main Generator Exciter Problems.Caused by Field Pole Failure in Main Generator.Replaced Exciter (← links)
- 05000327/LER-1995-018, :on 951218,inoperability of C Dioxide Sys for Computer Room Resulted from Inadequate Design Change. Established Fire Watch (← links)
- 05000327/LER-1984-049, :on 840815,interactions Found on Various safety-related Sys That Were Not in Compliance w/10CFR50,App R.Fire Watches Established.Corrective Action Schedule Expected by 850101 (← links)
- 05000327/LER-1995-016, :on 951204,failure to Establish Containment Temp Montoring Following Trouble Alarm on Fire Detector Panel.Caused by Operator Error.Lesson Learned Issued for Reading & Revised Procedure (← links)
- 05000327/LER-1995-017, :on 951208,manual RT Initiated as Result of Failed Air Line to FW Regulator Valve That Caused Low SG Level.Changed Configurations on Four Valves by Installing New Tubing & Fittings (← links)
- 05000327/LER-1984-048, :on 840725,during Review of Instrumentation Drawings,Only One RCS Pressure Channel Found Existent in Field Where Two Are Required.Previous Design Change Dictated Moving Channel.Second Channel Installed (← links)
- 05000327/LER-1984-047, :on 840717,high Radiation Signal Actuated, Causing Ventilation Isolation in Auxiliary & Containment Bldgs.Caused by Radiation Monitor Wire Slipping Onto Power Supply,Tripping Breaker.All Equipment Reset (← links)
- 05000327/LER-1984-046, :on 840727,various safety-related Sys Interactions Found Not in Compliance w/10CFR50,App R.Cause Not Stated.Fire Watches Established Until Compliance Achieved (← links)
- 05000327/LER-1995-015, :on 951101,ESF Actuation Occurred Due to Misinterpretation of Procedural Note of Determining Differential Proessure Across MSIV Prior to Opening Valve. Counseled Involved Personnel (← links)
- 05000327/LER-1992-005, :on 920219,discovered That Interlock Defeat Mechanism Removed Following Unit 1 Cycle 5 Refueling Outage Activities.Caused by Inadequate Usage of Configuration Log. Personnel Trained on Configuration Log Usage (← links)
- 05000327/LER-1995-014, :on 951005,SG Tube Determined to Exceed TS Plugging Limit.Caused by Result of Misjudgement on Part of Both Primary & Secondary Analysis.Performance Database Updated to Include Dented Intersections (← links)
- 05000327/LER-1995-013, :on 951010,surveillance Was Missed During Mode 6.Caused by Inadequate Training of Licensed Operators in Use of 12-wk Schedule.Revised Procedures to Include Comprehensive List of Routine SIs (← links)
- 05000327/LER-1984-044, :on 840705,during SI-7 Test on Diesel Generator 1A-A,remaining Three Diesel Generators Automatically Started.Caused by Personnel Error.Training Revised to Emphasize Procedures (← links)
- 05000327/LER-1991-027, :on 911213,manual Closure of MSIV Resulted in Inadvertent Cooldown of Rcs.Caused by Intermittent Failure of Steam Dump Valve Controller Resulting in Opening of Two Steam Dump Valves.Potentiometer Replaced (← links)
- 05000327/LER-1991-025, :on 911214,jumpers Were Discovered on a Train Closure Circuitry That Were Not Removed Following Outage Maint Activities.Caused by Personnel Not Following Proper Procedures.Disciplinary Action Taken (← links)
- 05000327/LER-1984-042, :on 840627,radiation Monitor 0-RE-90-225 Would Not Provide Automatic Isolation of Direct Releases from Neutralization Tank.Batch Releases Made on 840624 & 25 W/O Compliance W/Limiting Conditions (← links)
- 05000327/LER-1984-064, :on 840925,inadvertent Trip Occurred on lo-lo Steam Generator Level in Loop 1.Caused by Pressure Decrease Due to Opening MSIV FCV-1-4 for Loop 1.Precautionary Note Added to GOI-1 (← links)
- 05000327/LER-1995-012, :on 950923,determined That SRs Associated W/ Analog Channel Inputs to Ssps May Not Have Been Performed as Required by TS Because of Inadequate Performance Guidance. Procedure Established to Ensure That Stated Tests Performed (← links)
- 05000327/LER-1984-057, :on 840927,interactions on safety-related Sys Found Not in Compliance w/10CFR50,App R.Fire Watches Already Established Due to Commitments & Will Remain in Effect Until Full Compliance Achieved (← links)
- 05000327/LER-1984-036, :on 840618,neoprene Gasket Slipped & Bus Conductor Grounded,Causing Turbine & Reactor Trip.Caused by Slipped Gasket.Potential Transformer Insulators Cleaned & Gaskets Reworked (← links)
- 05000327/LER-1984-053, :on 840905,both Trains of Auxiliary Bldg Gas Treatment Sys Declared Inoperable Due to Uncontrolled Breach of Auxiliary Bldg Secondary Containment Encl.Caused by Opened Inner & Outer Door.Outer Door Closed (← links)
- 05000327/LER-1984-056, :on 840830,inadvertent Containment Vent Isolation Occurred Simultaneous W/Auxiliary Bldg Isolation. Caused by Loss of Train a Power to Main Control Room Panel Due to Breaker Trip.Breaker Reset (← links)
- 05000327/LER-1984-054, :on 840827,reactor Trip & Turbine Trip Initiated from Steam flow-feed Feed Mismatch & Low Steam Generator Level.Caused by Loss of Power from Relay Rack 1-R-15.Relay Rack Breaker Reset (← links)
- 05000327/LER-1984-051, :on 840911,following Addl Insps of Various safety-related Sys,Fire Watches Established in Compliance W/ App R of 10CFR50.Watch Will Remain in Effect Until Full Compliance Achieved (← links)
- 05000327/LER-1984-040, :on 840608,Tech Spec Surveillance Requirement for Standby Diesel Generator Overspeed Trip Lockout Not Performed within Required Time.Caused by Erroneous Rev to Procedure.Procedure Revised Correctly (← links)
- 05000327/LER-1984-039, :on 840527,control Room Ventilation Isolation Occurred Twice When High Radiation Alarm Actuated.Caused by Failed Vacuum Pump & Inadvertently Generated Spurious Spike. Alarm Cleared & Pump Bearings & Vanes Replaced (← links)
- 05000327/LER-1984-037, :on 840531,high Radiation Alarm Actuated, Causing Auxiliary Bldg Ventilation Isolation.Caused by Spike on Spent Fuel Pool Radiation Monitor.Radiation Normal. Background Radiation Level Close to Setpoint (← links)
- 05000327/LER-1992-001-01, :on 920117,determined That 2B-B DG Load Sequence Timer Associated W/Train B Electric Board Room Air Handling Unit Not Calibr Per Ts.Caused by Procedural Inadequacies.Site Stds Revised (← links)
- 05000327/LER-1992-002, :on 920118,train B Containment Ventilation Isolation Occurred Due to Spurious Actuation of Containment Purge Exhaust Radiation Monitor.Root Cause Indeterminate. Radiation Monitor Returned to Svc (← links)
- 05000327/LER-1984-035, :on 840521 & 0602,turbine Trip Occurred Due to Failure of Bearing.Caused by Thermocouple Shorting to Ground.Thermocouple Replaced (← links)
- 05000327/LER-1984-033, :on 840511,automatic Reactor Trip on lo-lo Level Experienced in Steam Generator 2 Following Turbine Trip.Caused by Broken Linkage on Steam Dump Valve 1-FCV-1-107.Linkage Replaced (← links)
- 05000327/LER-1984-034, :on 840509,valve 1-67-537B Found Mispositioned When Valves 1-FCV-67-123 & 1-FCV-67-124 Opened.Caused by Valve Being Closed Since 840424.Valve Throttled to Proper Position (← links)
- 05000327/LER-1984-031, :on 840505,plant Shutdown Due to Inoperable Pressurizer Safety Relief Valve.On 840506,reactor Trip Occurred on low-low Steam Generator 1.Caused by Valve Seat Leakage & Failed Current to Pressure Converter (← links)
- 05000327/LER-1984-032, :on 840510,w/low Steam Generator Level,Reactor Trip Occurred on Low Feedwater Flow Coincident.Caused by Leaking Air Line Supplying Heater Drain Tank Level Control Valve.Air Line Repaired (← links)
- 05000327/LER-1984-029, :on 840507,high Radiation Alarm Actuated, Causing Auxiliary Bldg Ventilation Isolation to Occur.Caused by Unstable Detector Output & Conservative Radiation Level Setpoint.Related Incident on 840508 (← links)
- 05000327/LER-1992-008, :on 920307,inadvertent Containment Ventilation Isolation Occurred During Testing.Caused by Failure to Repeat self-check Process.Event Discussed W/Personnel to Stress Importance to Repeat Process (← links)
- 05000327/LER-1991-002-01, On 910124,LCOs 3.0.5 & 3.8.1.1 Entered When Both Trains of Emergency Gas Treatment Sys Were Declared Inoperable.Caused by Personnel Error.Procedure SI-166.36 Revised (← links)
- 05000327/LER-1984-043, :on 840627,during Surveillance,Thermal Fire Detector Discovered Inoperable.Required 1 H Fire Watch Not Established.Shift Engineer Not Notified.Fire Detector Replaced & Returned to Svc (← links)
- 05000327/LER-1992-006, :on 920209,failure to Verify RCS Flow Above TS Limits Led to LCO 3.2.5.After Exit from Lco,Failure to Check SI Criteria Renewed Error.Caused by Personnel Error.Si Data Sheets Revised & Personnel Counselled (← links)
- 05000327/LER-1992-004, :on 920205,during Walkdown to Identify Breaker Types,Calculation Review Identified Breaker 003 on Each Board Not Addressed.Caused by Inadequate Preparation/Review. Vital Battery Tagged Out & Criteria Revised (← links)
- 05000327/LER-1984-041, :on 840610,pressurizer Pressure Indicator in Auxiliary Control Room Discovered Inoperable.Caused by Wire Reterminated Incorrectly During Last Calibr.Wire Lifted & Reterminated in Correct Position (← links)
- ML11110A148 (redirect page) (← links)
- 05000327/LER-2011-005-01, Regarding a Reactor Trip as a Result of Reactor Coolant Pump Bus Undervoltage (← links)
- 05000327/LER-2011-004-01, Reactor Trip as a Result of a Loss of a Preferred Inverter - Revision 1 (← links)
- 05000327/LER-2011-003-01, Regarding Reactor Trip as a Result of Turbine Control Card Failure - Supplement 1 (← links)
- 05000327/LER-2011-004, Revised Submittal Schedule for Supplemental Report for License Event Report 327/2011-004, Reactor Trip as a Result of a Loss of a Preferred Inverter (← links)
- 05000327/LER-2011-005, Regarding Reactor Trip as a Result of Reactor Coolant Pump Bus Undervoltage (← links)
- 05000328/LER-2011-001-01, For Sequoyah Nuclear Plant, Unit 2 Regarding Nuclear Instrumentation System Power Range Neutron Flux Trip Low Range Bistable Incorrectly Calibrated - Revision 1 (← links)
- 05000327/LER-2011-003, For Sequoyah, Unit 1, Reactor Trip as a Result of Turbine Control Card Failure (← links)
- 05000328/LER-2011-001, Regarding Nuclear Instrumentation System Power Range Neutron Flux Trip Low Range Bistable Incorrectly Calibrated (← links)
- 05000327/LER-2011-002, Regarding Feedwater Regulator Valve Inoperable (← links)