Pages that link to "05000237/LER-2008-001, Regarding Procedure Adherence Issue Results in Violation of Technical Specification"
Jump to navigation
Jump to search
The following pages link to 05000237/LER-2008-001, Regarding Procedure Adherence Issue Results in Violation of Technical Specification:
Displayed 8 items.
- 05000237/LER-2008-001 (redirect page) (← links)
- 05000237/LER-2001-004 (← links)
- 05000237/LER-2001-003 (← links)
- 05000237/LER-2001-002 (← links)
- 05000237/LER-2001-001 (← links)
- IR 05000237/2008004 (← links)
- TS-3.1.6 (← links)
- 05000237/LER-1982-018, Forwards LER 82-018/03L-0 (← links)
- 05000237/LER-1982-013, Forwards LER 82-013/03X-1 (← links)
- 05000237/LER-1982-009, Forwards LER 82-009/03L-0 (← links)
- 05000237/LER-1982-008, Forwards LER 82-008/03L-0 (← links)
- 05000237/LER-1982-015, Forwards LER 82-015/03L-0 (← links)
- 05000237/LER-1982-041, Forwards LER 82-041/03L-0 (← links)
- 05000237/LER-1982-038, Forwards LER 82-038/03L-0 (← links)
- 05000237/LER-1982-039, Forwards LER 82-039/03L-0 (← links)
- 05000237/LER-1983-011, Forwards LER 83-011/01T-0 (← links)
- 05000237/LER-1983-004, Forwards LER 83-004/03L-0 (← links)
- 05000237/LER-1983-005, Forwards LER 83-005/03L-0 (← links)
- 05000237/LER-1982-053, Forwards LER 82-053/03L-0 (← links)
- 05000237/LER-1982-055, Forwards LER 82-055/03L-0 (← links)
- 05000237/LER-1982-052, Forwards LER 82-052/03L-0 (← links)
- 05000237/LER-1982-051, Forwards LER 82-051/03L-0 (← links)
- 05000237/LER-1981-059, Forwards LER 81-059/03L-0 (← links)
- 05000237/LER-1982-035, Forwards LER 82-035/03L-0 (← links)
- 05000237/LER-1982-021, Forwards LER 82-021/01T-0 (← links)
- 05000237/LER-1982-020, Forwards LER 82-020/03L-0.Detailed Event Analysis Encl (← links)
- 05000237/LER-1982-033, Forwards LER 82-033/03L-0 (← links)
- 05000237/LER-1982-017, Forwards LER 82-017/03L-0 (← links)
- 05000237/LER-1982-029, Forwards LER 82-029/03L-0 (← links)
- 05000237/LER-1981-066, Forwards LER 81-066/03L-0 (← links)
- 05000237/LER-1982-028, Forwards LER 82-028/03L-0 (← links)
- 05000237/LER-1982-026, Forwards LER 82-026/03L-0.Detailed Event Analysis Encl (← links)
- 05000237/LER-1982-025, Forwards LER 82-025/03L-0.Detailed Event Analysis Encl (← links)
- 05000237/LER-1982-024, Forwards LER 82-024/03L-0 (← links)
- 05000237/LER-1982-059, Forwards LER 82-059/03L-0 (← links)
- 05000237/LER-1982-047, Forwards LER 82-047/03L-0 (← links)
- 05000237/LER-1982-044, Forwards LER 82-044/03L-0 (← links)
- 05000237/LER-1983-012, Forwards LER 83-012/01T-0 (← links)
- 05000237/LER-1982-045, Forwards LER 82-045/03L-0 (← links)
- 05000237/LER-1982-046, Forwards LER 82-046/03L-0 (← links)
- 05000237/LER-1983-080, Supplemental LER 83-080/03X-1:on 831124,offgas Log Rad Monitor 2-1705-A Delivered Offgas High Alarm & High Alarm Spiked & Drifted Downscale.Caused by Burned Out Resistor. Power Supply Installed & Monitor Calibr (← links)
- 05000237/LER-1976-063, Updated LER 76-063/03L-l:on 761003,stack Gas Sample Pump Flow Appeared Abnormally Low.Caused by Collection of Carbon Impeller Vane Products in Pump Cavity & Filter.Pump & Filter Replaced (← links)
- 05000237/LER-1976-066, Updated LER 76-066/01T-1:on 761113,during Maint Outage,Hpci Injection Valve M02-23018 Found in Closed Position W/Valve Stem Severed.Caused by Mechanical Overstress of Stem.Stem Replaced (← links)
- 05000237/LER-1976-053, Updated LER 76-053/01T-1:on 760803,util Advised by GE That MAPLHGR Limits in Effect No Longer Considered Sufficiently Conservative at Low Core Flow Rates.Problem Thought to Be ECCS Models Used to Determine Rates (← links)
- 05000237/LER-1983-001, Forwards LER 83-001/03L-0 (← links)
- 05000237/LER-1982-050, Forwards LER 82-050/01T-0 (← links)
- 05000237/LER-1983-023, Forwards LER 83-023/03L-0 (← links)
- 05000237/LER-1983-022, Forwards LER 83-022/03L-0 (← links)
- 05000237/LER-1983-029, Forwards LER 83-029/01T-0 (← links)
- 05000237/LER-1983-021, Forwards LER 83-021/03L-0 (← links)
- 05000237/LER-1983-020, Forwards LER 83-020/03L-0 (← links)
- 05000237/LER-1983-009, Forwards LER 83-009/03L-0 (← links)
- 05000237/LER-1950-237, Updated LER 50-237/75-048:on 751007,through-wall Crack Found in Drywell/Torus Nitrogen Purge Line 1604-18.Addl Mods, Including Temp Controlled Isolation Valve Installation, Delayed Until Proposal Review (← links)
- 05000237/LER-1983-017, Forwards LER 83-017/03L-0 (← links)
- 05000237/LER-1983-018, Forwards LER 83-018/01T-0.Detailed Event Analysis Encl (← links)
- 05000237/LER-1983-015, Forwards LER 83-015/03L-0 (← links)
- 05000237/LER-1983-016, Forwards LER 83-016/03L-0.Detailed Event Analysis Encl (← links)
- 05000237/LER-1983-007, Forwards LER 83-007/03L-0 (← links)
- 05000237/LER-1983-013, Forwards LER 83-013/03L-0 (← links)
- 05000237/LER-1983-014, Forwards LER 83-014/03L-0 (← links)
- 05000237/LER-1982-043, Forwards Updated LER 82-043/01X-2 (← links)
- 05000237/LER-1983-010, Forwards LER 83-010/03L-0 (← links)
- 05000237/LER-1982-030, Forwards LER 82-030/01T-0 (← links)
- 05000237/LER-1983-002, Forwards Updated LER 83-002/03X-1 (← links)
- 05000237/LER-1982-042, Forwards Updated LER 82-042/01X-1 (← links)
- 05000237/LER-1982-040, Forwards Updated LER 82-040/03X-1 (← links)
- 05000237/LER-1982-019, Forwards Updated LER 82-019/03X-1 (← links)
- 05000237/LER-1982-034, Forwards Updated LER 82-034/03X-1 (← links)
- 05000237/LER-1981-020, Forwards Updated LER 81-020/01X-1 (← links)
- 05000237/LER-1981-055, Forwards Updated LER 81-055/03X-1 (← links)
- 05000237/LER-1982-022, Forwards LER 82-022/03L-0 (← links)
- 05000237/LER-2023-001, HPCI Inoperable Due to Air Void Accumulation (← links)
- 05000237/LER-2022-001-01, Reactor Scram Due to Turbine Trip on High Reactor Water Level Caused by Feedwater Regulating Valve Failure (← links)
- 05000237/LER-2022-002-01, Ultimate Heat Sink Declared Inoperable Due to River Grass Accumulation (← links)
- 05000237/LER-2022-002, Ultimate Heat Sink Declared Inoperable Due to River Grass Accumulation (← links)
- 05000237/LER-2022-001, Reactor Scram Due to Turbine Trip on High Reactor Water Level Caused by Feedwater Regulating Valve Failure (← links)
- 05000237/LER-1989-001-05, :on 890121,unanticipated Reactor Scram & Group II Primary Containment Isolation Occurred Due to Loss of Reactor Protection Sys Motor Generator Sets.Caused by Procedural Deficiency.Procedure Reviewed (← links)
- 05000237/LER-1986-023-04, :on 860920,reactor Bldg Ventilation Sys Isolated & Standby Gas Treatment Sys Initiated.Caused by Power Supply 2-1705-7B Failure Due to Defective Dial Component.Power Supply Replaced (← links)
- 05000237/LER-1986-025-04, :on 861122,grab Sample Not Connected to Chimney Effluent Sample Point.Caused by Personnel Error.Technician Involved Admonished.Comprehensive Training Planned for All Technicians to Review Tech Spec (← links)
- 05000237/LER-1986-021-04, :on 860828,Unit 2/3 Main Chimney Continuous Particulate & Iodine Sample Not Collected Per Tech Spec 3.2 (Table 3.2.5).Caused by Procedural Inadequacy.New Procedure Will Be Written (← links)
- 05000237/LER-1986-020-03, :on 860827,small Bore Torus Attached Piping Supports Violated Allowable Limits Specified in NUREG-0661. Caused by Design Error.Pipe Supports Will Be Modified (← links)
- 05000237/LER-1986-015-05, :on 860805,reactor Bldg Ventilation Particulate Sampler Filter Found Broken When Radiation Chemistry Technician (RCT) Attempted to Remove Filter for Counting. Caused by Improper Installation by RCT (← links)
- 05000237/LER-1987-003, :on 870108,primary Containment Drywell Structural Steel Did Not Meet FSAR Design Requirements Due to Inadequate Connections Between Radial & Tangential Beams. Caused by Inadequate Confirmation of Const (← links)
- 05000237/LER-1986-028-04, :on 861208,Tech Specs for HPCI Area Temp Switches Exceeded.Caused by Instrument Setpoint Drift. Switches Recalibr to Trip Point Setting (← links)
- 05000237/LER-1986-009, :on 860401,seismic Evaluation of Control Room Panels for Mounting of Future Instrumentation Revealed Missing Mount Bolts.Caused by Initial Installation Deficiency.Bolts & Track Welds Installed (← links)
- 05000237/LER-1986-027-04, :on 861130,during Surveillance 4400-1, Containment Cooling Svc Water Vault Floor Drain Level Switch 2-4941-8 Failed.Caused by Loss of Spring Tension Due to Normal Wear.Switch Repaired (← links)
- 05000237/LER-1986-017-04, :on 860712,while Performing Operating Surveillance 500-8,MSIV 2-203-1C Fully Closed Causing Pressure & Neutron Flux Spike.Caused by Failed 90% Open Limit Switch &/Or Sticking Test Switch (← links)
- 05000237/LER-1986-024-04, :on 861117,main Chimney Separate Particulate Iodine & Noble Gas Sampler (Sping) Experienced Loss of Flow Condition.Caused by Water in Filters of Sping.Work Request D59639 Initiated (← links)
- 05000237/LER-1987-003-01, :on 870108,found Primary Containment Drywell Structural Steel Not Meeting FSAR Design Requirements.Caused by Inadequate Confirmation of Original Const & as-built Configuration.Repair Program Developed (← links)
- 05000237/LER-1986-022-04, :on 860918,fire Main Valve Position Not Verified Per Tech Spec 4.12.B.1.A.Caused by Personnel Oversight.Event Discussed During Monthly Shift Engineer Meeting (← links)
- 05000237/LER-1986-006-05, :on 860312,while at 100% Power,Pumpdown of Drywell Equipment & Floor Drain Sumps Not Performed as Required by Tech Specs.Caused by Personnel Error.Sumps Pumped & Operator Made Aware of Error (← links)
- 05000237/LER-1987-002-02, :on 870105,radwaste Off Stream Liquid Effluent Monitor Isolated During Radwaste Discharge.Caused by Operator Failure to Verify Proper Valve Alignment & Sample Flow.Foreman Relieved of Duties (← links)
- 05000237/LER-1987-004-01, :on 870108,primary Containment Type B & C Local Leak Rate Test Limit Exceeded Due to Excessive Leakage Through Isolation Valve.Valve Will Be Repaired & Retested Per Dts 1600-1 When Cause Determined (← links)
- 05000237/LER-1986-019-04, :on 860811,while Reactor Operating at 91%,main Turbine Tripped on +55 Inches Reactor Water Level Which Resulted in Full Reactor Scram.Caused by Failure of Feedwater Regulating Valve a to Close (← links)
- 05000237/LER-1987-001-01, :on 870102 & 0121,ultrasonic Testing Revealed Through Wall Indications on Pipe Welds PD5-D20 & 8-12.Caused by Igscc.Engineering Evaluation on Indications Performed (← links)
- 05000237/LER-1986-029-04, :on 861213,standby Liquid Control Relief Valve a Found to Open at 1,510 Psi.Caused by Setpoint Drift. Relief Valve Setpoint Adjusted & Retested (← links)
- 05000237/LER-1986-030-04, :on 861214,MSIV 2-203-2B Leaked in Excess of Tech Spec 3.7.A.2.b Limit.Caused by Packing Leak on 2-203-2B Valve.Valve Repacked & Local Leak Test Successfully Performed (← links)
- 05000237/LER-1986-026-02, :on 861129,primary Containment Deinerted More than 24 H Prior to Shutdown.Caused by Personnel Error.Shift Supervisors Notified & Shutdown Procedures Changed Re Deinerting Time Restriction (← links)
- 05000237/LER-1986-011, :on 860520,full Reactor Scram Occurred Due to Low Reactor Water Level.Caused by Personnel Error.Procedural Violation Rept Completed & Reactor Operator Informed of Necessity of Proper RWCU Sys Isolation (← links)
- 05000237/LER-1986-013-05, :on 860524,reactor Operator Observed That Reactor Vessel Not Vented at Less than 149 F,Violating Tech Spec 3.6.B.1.Caused by Personnel Error.Tech Spec Change Initiated to Change Min Temp to 100 F (← links)
- 05000237/LER-1986-012-05, :on 860521,full Scram Instead of Half Scram Occurred During Installation of Jumper Around Electrical Contact.Caused by Failure to Maintain Circuit Continuity. Vacuum & Scram Circuitry Reviewed (← links)
- 05000237/LER-1986-011-05, :on 860520 Full Scram Occurred Twice Due to Low Reactor Water Level.Caused by Reactor Feedwater Regulating Valve B Booster Relay Failure & Personnel Error.Relay Replaced & Violation Rept Completed (← links)
- 05000237/LER-1987-006-02, :on 870228,during Refueling,Reactor Scram & Group II Isolation Occurred.Caused by Trip at Bus 28 of Main Feed Breaker of Motor Control Ctr (MCC) 28-2.Reactor Protection Sys Bus 2B Transferred to MCC 25-2 (← links)
- 05000237/LER-1987-007-02, :on 870227,drywell Structural Steel Radial Beam Discovered Outside Design Requirements.Caused by Reinstallation Deficiency.Beam Repair Completed on 870314, Per Engineering Change Notice D875-09 (← links)
- 05000237/LER-1987-005-02, :on 870218,w/unit Shut Down for Refueling Outage,Snubbers 1301,1302 & 1303 Failed to Activate or Bleed within Allowable Ranges.Caused by Upgraded Test Acceptance Criteria.Two Mechanical Snubbers Installed (← links)
- 05000237/LER-1986-009-06, :on 860401,seismic Evaluation of Control Room Panels Revealed That Panels Not Positively Mounted to Floor.Caused by Installation Discrepancy.Bolts & Tack Welds Installed on Panels (← links)
- 05000237/LER-1986-008-05, :on 860331,automatic Start of Standby Gas Treatment Sys a & Reactor Bldg Ventilation Isolation Occurred Due to High Radiation Trip.Caused by Failure of Geiger Muller Tube in Radiation Monitor (← links)
- 05000237/LER-1986-018-04, :on 860713,reactor Coolant Sample Not Taken During Reactor Startup.Caused by Miscommunication within Radiation Chemistry Dept.Event Discussed W/Involved Personnel (← links)
- 05000237/LER-1986-016-05, :on 860713,reactor Scrammed on Condenser Low Vacuum.Caused by Disconnected Pipe Union.On 860714,1-inch Pipe Union Found Separated.Union Reconnected & All Piping Connections Restored to Original Condition (← links)
- 05000237/LER-1986-004, :on 860217-20,violation of Core Thermal Power Limit Occurred.Caused by Miscalibrated Feedwater Flow Transmitter.Operating Surveillance 500-18 Revised.Protective Barrier Installed Around Transmitter (← links)
- 05000237/LER-1986-014-05, :on 860616,discovered Smoke Detector Semiannual Maint Test Not Performed.Caused by Incorrectly Set Priorities on outage-related Activities.Surveillance Completed & Hourly Fire Watch Discontinued (← links)
- 05000237/LER-1986-007-07, :on 860501,two Containment Atmosphere Monitoring Lines Did Not Meet NUREG-0661 Criteria.Caused by Lack of Design Document Control During Mod.Monthly Status Rept Will Be Mailed to Each Ae (← links)
- 05000237/LER-1985-037-03, :on 851007,reactor Bldg Ventilation Tripped & Isolated W/Standby Gas Treatment Sys Autostarting as Required.Caused by Operator Removing Wrong Fuse.Station Tailgate Session Conducted (← links)
- 05000237/LER-1985-038-03, :on 851005,after Equipment Qualification Outage,Valve MO-2-220-2 Automatically Closed When Being Placed Back in Svc.Cause Not Stated.Valve Opened (← links)
- 05000237/LER-1985-035-03, :on 850929,scram Occurred Due to Low Condenser Vacuum.Caused by Air in-leakage Through Ruptured Expansion Joint on Seal Steam Relief Valve Discharge Line.Bellows on Discharge Line Replaced (← links)
- 05000237/LER-1986-022-01, :on 860901,fire Main Valve Position Not Verified on Schedule.Caused by Oversight by Operations Dept Personnel.Importance of Completing Surveillances as Scheduled Emphasized (← links)
- 05000237/LER-1986-003-06, :on 860226,pumpdown of Drywell Equipment & Floor Drain Sumps Not Performed at Proper Interval.Caused by Operator Error & Equipment Malfunction.Horn Replaced & Operators Made Aware of Error (← links)
- 05000237/LER-1986-002-05, :on 860124,during Normal Start up,1,200 H Pumpdown of Drywell Floor & Equipment Drain Sumps Not Performed.Caused by Personnel Error & Equipment Malfunction. Broken Horn Fixed.Personnel Counseled (← links)
- 05000237/LER-1984-022, :on 841205,three Main Steam Line Snubbers Failed Functional Test.Caused by condensation-induced Water Hammer in Main Steam Lines While Performing Reactor Vessel Fast Flood Procedure Dgp 2-2.Procedure Deleted (← links)
- 05000237/LER-1978-030-01, /01X-1 on 780428:During Unit 2 Startup Opers, a LPCI & Core Spray Subsys Were Inadvertantly Rendered Inoper Because Personnel Had Closed LPCI Pump & Discharge Valves on Unit 2 Vice 3.(Encl to 7809180320) (← links)
- 05000237/LER-1978-030, Forwards LER 78-030/01X-1 (← links)
- 05000237/LER-1978-050-01, /01T-0 on 780824:Unit 2 Diesel Failed W/ Diesel Generators 2 & 3 Out of Serv Because Pinion Gear on an Air Start Motor Did Not Engage W/ Diesel Ring Gear.Air Start Motor Replaced. (Encl to 7809180225) (← links)
- 05000237/LER-1978-050, Forwards LER 78-050/01T-0 (← links)
- 05000237/LER-1986-001-08, :on 860121,at 47% Power,Unit Scrammed on Greater than 10% Turbine Stop Valve Closure Trip Signal. Caused by Failure of Yarway Instrument Isolation Valve Manifold.Manifold Replaced & Calibr (← links)
- 05000237/LER-1986-004-05, :on 860217-20,core Thermal Power Limit Violated for 41 H.Caused by Reactor Feedpump 2C Flow Transmitter Out of Calibr.Work Request Issued to Install Protective Barrier Around Transmitter (← links)
- 05000237/LER-1985-005-02, :on 850130,during Outage,Full Group II Isolation Occurred When Operator Error Caused Isolation Signal Generated from Transmitter While Valving Transmitter Back Into Svc.Operator Training Revised (← links)
- 05000237/LER-1985-036-03, :on 851002,reactor Bldg Ventilation Sys Trip Occurred from Fuel Pool Monitor Downscale Trip.Caused by Loose Channel a Connector & Low Channel B Setpoint.Anomalies Corrected.Bldg Sys Reset (← links)
- 05000237/LER-1985-042-03, :on 851106,diesel Generator Day Tank Room Fire Door & Auxiliary Electrical Equipment Room West Fire Door Failed to Have 3 H Fire Rating Labels.Labels Cut Off During Installation.Doors Will Be Replaced (← links)
- 05000237/LER-1985-041-04, :on 851112,unit Scrammed on Greater than 10% Turbine Stop Valve Closure Trip Signal.Caused by Turbine Trip Resulting from Simulated Reactor Vessel High Water Level.Valve Manifold for ECCS Switch Replaced (← links)
- 05000237/LER-1985-028-01, :on 850619,unit Received East Scram Discharge Vol hi-hi Water Level Alarm & Subsequent Reactor Scram. Caused by Excessive Water Leakage Through Scram Outlet Valve CV2-305-127 on CRD J-6 (← links)
- 05000237/LER-1986-005-03, :on 860206,reactor Scram Occurred When Operator Placed Reactor Mode Switch from Refuel to Startup.Caused by Faulty Mode Switch.New Design Mode Switches Ordered (← links)
- 05000237/LER-1985-039-04, :on 851028,discovered That Quarterly Functional Test of 2/3 Radwaste Tank Farm Level Instrumentation Not Performed by 850617,per Tech Spec Table 4.2.2.Caused by Late Approval of Surveillance Procedure (← links)
- 05000237/LER-1985-044-04, :on 851213,discovered Power Cable to Diesel Generator 2/3 Cooling Water Pump Damaged & Generator 2 Tripped When Brought Offline.Caused by Use of Conduit as Support When Climbing Ladder (← links)
- 05000237/LER-1985-040-03, :on 851021,during Review of Mar 1978 SER Re Plant Fire Protection Program,Discrepancies Concerning Mods Described in SER Discovered.Caused by Inadequate Documentation of Commitments in SER (← links)
- 05000237/LER-1985-043-04, :on 851205,recirculation Pump 2B Tripped.Caused by Loss of Power to Reserve Bus 2B Due to Procedural Deficiencies.Changes to Ground Check Procedures Will Be Made (← links)
- 05000237/LER-1985-034-03, :on 850816,unit Tripped from Low Reactor Water Level Scram.Caused by Loss of Offsite Power.Procedure Written to Modify Main Transformer During Extended Loss of Offsite Power Event (← links)
- 05000237/LER-1985-033-03, :on 850802,functional Test for 2/3 Chimney Sping & 2/3 Reactor Vent Sping low-, mid- & high-range Noble Gas Detectors Exceeded Tech Specs.Caused by Personnel Error. Personnel Counseled & Test Added (← links)
- 05000237/LER-1985-032-03, :on 850802,Group 1 Isolation Automatically Initiated & Scram Resulted.Caused by Steam Line Pressure Drop Below 850 Psig & Mode Switch Contacts in Run Position. Switch Contact Test Procedures Modified (← links)
- 05000237/LER-1985-031-03, :on 850727,east Bank Scram Discharge Vol hi-hi Water Level Scram Occurred.Caused by Steam Generated from Reactor Bldg Drain Header.Trip Setpoint of Instruments Lowered & Engineering Analysis Performed (← links)
- 05000237/LER-1985-030-03, :on 850716,high Radiation Signal from Refueling Floor Radiation Monitors Caused Reactor Bldg Ventilation Sys Trip.Caused by Fuel Handlers Lifting Machinery for Repairs.Machine Submerged (← links)
- 05000237/LER-1985-084, :on 850626,fire Watch Not Started Promptly When Five of Six motor-operated Ventilation Dampers Failed to Operate Properly.Caused by Personnel Error.Dampers Repaired (← links)
- 05000237/LER-1985-028-03, :on 850619,while Performing Shutdown,Unit Received East Scram Discharge Vol hi-hi Water Level Alarm & Reactor Scram.Caused by Leakage Through Scram Outlet Valve CV2-305-127.Valve Line Flushed (← links)
- 05000237/LER-1985-021-02, :on 850503,during Shutdown,Two Reactor Scrams Occurred from Intermediate Range Monitors 13 & 15 hi-hi Condition.Caused by Spurious Radio Repeater Signals. Relocation of Radio Repeaters Initiated (← links)
- 05000237/LER-1985-027-03, :on 850609,during Shutdown,Half Isolation Alarm Signaled W/Reactor Pressure Drop.Caused by Mode Switch Failing to Make All Contacts.Operators Reinstructed (← links)
- 05000237/LER-1985-020-02, :on 850424,during HPCI Steam Line High Flow Isolation Surveillance,Hpci Valve 2301-H Failed to Close. Caused by Dirty Breaker Auxiliary Contacts.Contacts Cleaned & Later Replaced (← links)
- 05000237/LER-1985-022-02, :on 850502,unit Manually Scrammed to Avoid Exposing Condensate Demineralizers to High Temp.Caused by H2 & O2 Recombination Upstream of Offgas Chamber (← links)
- 05000237/LER-1985-025, :on 850508,0000 H Drywell Sump Pumpdown Surveillance Interval Exceeded 325% Limit for Three Successive Intervals,Per Tech Spec 4.6.D.1.Caused by Failure of Reminder Alarm to Sound.Backup Alarm Added (← links)
- 05000237/LER-1985-019-03, :on 850419,diesel Generator 2/3 Automatically Started W/O Bus undervoltage,lo-lo Water Level or Drywell High Pressure.Caused by Possible Inadvertent Jarring of Auto Start Relay 1430-108A (← links)
- 05000237/LER-1984-013, :on 840722,reactor Scrammed Due to Opening of Electron Hydraulic Control Sys,Causing Turbine to Trip on Low Oil Pressure.Caused by Personnel Error.Changes Made to Training Program for Newly Hired Attendants (← links)
- 05000237/LER-1985-018-03, :on 850415,routine Svc Water Effluent Samples Taken 6 H After 12 H Tech Spec Time Limit Expired.Caused by Personnel Error.Responsible Individual Retrained.Technician Routine Checklist Updated (← links)
- 05000237/LER-1985-016-03, :on 850411,during Startup Following Refueling outage,0000 H Pumpdown of Drywell Floor & Equipment Sumps Not Performed.Cause Not Stated.Operator Briefed as to Importance of Sump Pumping at Proper Time (← links)
- 05000237/LER-1985-017-03, :on 850413,during Startup,Reactor Water Samples Not Taken Every 4 H.Caused by Misunderstanding Between Personnel.Personnel Briefed on Importance of Providing & Following Specific Instructions During Startup (← links)
- 05000237/LER-1985-025-02, :on 850508,drywell Sump Pumpdown Not Performed. Caused by Failure of Alarm Due to Computer Software Problems.Pumpdown Performed & Program Revised (← links)
- 05000237/LER-1985-026-02, :on 850518,while Testing Control Valve CV-3, Reactor Scram Occurred.Caused by Failure of 10% Open Limit Switch.Switch & Connecting Rod Replaced.Circuit Tested Operable (← links)
- 05000237/LER-1979-067-03, /03L-0:on 791218,during Surveillance Testing of Diesel Generators 2/3,pinion Gears Engaged,Starting Generator.At 200 Rpm Pinion Gears Remained Engaged.Probably Caused by Bad Connection in Speed Sensing Circuit (← links)
- 05000237/LER-1985-024-02, :on 850505,APRM Channel 1 Inoperable During Gain Change.Caused by Personnel Error.Mode Switch Placed in Run Position to Make APRM Channel Operable (← links)
- 05000237/LER-1985-023-02, :on 850502,radiation Monitor Scram & Isolation Functional Test Performed & Full Scram Occurred When Channel Main Steam Line Radiation Monitor D Tripped.Caused by Spurious Trip Signal of Channel Monitor C (← links)
- 05000237/LER-1985-015, :on 850325,three Main Steam Line Low Pressure Switches Tripped Below Tech Spec Min Trip Point.Caused by Instrument Setpoint Drift.Switches Immediately Recalibr & Tested (← links)
- 05000237/LER-1984-023-01, :on 841211,during Refueling Outage,Torus to Condenser Drain Valve AO2-1599-61 Leaked 121 Scfh.Caused by Misaligned Stem.Stem Adjusted & Valve Retested (← links)
- 05000237/LER-1985-006-01, :on 850217,while Shut Down for Refueling,Full Scram Occurred.Caused by Improper Design & Lack of Extensive Design Review.Power Supplies Will Be Redesigned,Rewired & Functionally Tested (← links)
- 05000237/LER-1985-015-02, :on 850325,three Main Steam Line Low Pressure Isolation Switches Tripped Below Tech Spec Min Trip Point. Caused by Instrument Setpoint Drift.Switches Recalibr to Meet Tech Spec Limit & Successfully Tested (← links)
- 05000237/LER-1984-019, :on 841206,w/unit in Refuel & Inservice Insp in Progress,Welds Located in Reactor Water Cleanup Sys Identified as Having Rejectable Indications.Welds Repaired by Weld Overlay or Pipe Replacement (← links)
- 05000237/LER-1984-024, :on 841207,secondary Containment Momentarily Broken.Cause Not Determined.Turbine Bldg Door Immediately Closed.No Problem W/Electrical Controls for Doors Discovered (← links)
- 05000237/LER-1985-014-02, :on 850315,during Reactor Refueling,W/Mode Switch in Shutdown,Reactor Protection Sys Switched from Reserve to Normal Power,Resulting in Full Scram.Caused by Personnel Error.Engineer Responsible Counseled (← links)
- 05000237/LER-1985-010, :on 850305,fire Watch Not Established within 1 H of Opening Fire Door for 125-volt Dc Battery Room for Maint on Fire Header Valve Located Outside Room.Caused by Personnel Oversight.Door Closed (← links)
- 05000237/LER-1985-013-02, :on 850310,ATWS Alternate Rod Insertion Initiated.Caused by Leaking Isolation Valve Which Allowed Hydrostatic Pressure to Bleed Into One Side of Level Diaphragm Causing Low Level Condition (← links)
- 05000237/LER-1984-025-05, :on 841220,4-kV Main Feed Breaker 152-2430 on Bus 24-1 Failed to Trip Open.Caused by Dirty Auxiliary Breaker Contacts in Trip Control Logic.Contacts Cleaned & Breaker Returned to Svc After Testing (← links)
- 05000237/LER-1985-010-03, :on 850305,fire Door for 125-volt Battery Room Encl Found Open W/O Fire Watch Established within 1 H Per Tech Spec 3.12.F.2.Cause Under Investigation.Suppl Will Be Issued on 850410 W/Results of Investigation (← links)
- 05000237/LER-1985-002, :on 850103,reactor/turbine 517 Ft Interlock Alarm Received,Indicating Interlock Doors Opened Simultaneously.Caused by Doors Closing Too Quickly.Door Closures Adjusted W/Bldg Pressures (← links)
- 05000237/LER-1984-023-05, :on 841214,torus-to-condenser Drain Valve AO 2-1599-61 Leaked 121 Scfh.Cause Unknown.Valve Repaired & Will Be Leak Rate Tested Prior to Return to Svc (← links)
- 05000237/LER-1984-019-06, :on 841206,w/unit in Refuel & Inservice Insp in Progress,Welds Located in Reactor Water Cleanup Sys Identified as Having Rejectable Indications.Repairs Will Be Made by Weld Overlay &/Or Pipe Replacement (← links)
- 05000237/LER-1984-024-05, :on 841207,secondary Containment Momentarily Broken When Turbine Bldg Interlock Door Opened Before Reactor Bldg Interlock Door Fully Closed.Caused by Personnel Exiting Reactor Bldg.Door Functioning Properly (← links)
- 05000237/LER-1984-021-01, :on 841012,full-in Limit Switch on CRD K-8 Jumpered to Prevent Refueling Block.Caused by Personnel Error.Appropriate Personnel Counseled (← links)
- 05000237/LER-1984-108, :on 841205,main Steam Line Mechanical Snubbers Inoperable.Cause Under Investigation.Snubbers Replaced (← links)
- 05000237/LER-1985-005-04, :on 850130,Group II Isolation Occurred While Returning Level Transmitter 2-263-S8B to Svc.Cause Under Investigation.Supplemental Rept Will Be Issued When Root Cause Determined (← links)
- 05000237/LER-1984-020-04, :on 841010,two Hose Station Root valves,F67A & F80B Discovered Valved Out During Walkdown.Valves Opened Immediately.Revised Procedures Omitted Surveillance of Root Valve Position.Procedures Revised (← links)
- 05000237/LER-1985-003-06, :on 850129,level Transmitters 2-263-57A,58A & 58B Taken Out of Svc Causing Group 2 Isolation.Caused by Operator Error.Operator Counseled (← links)
- 05000237/LER-1984-018-04, :on 841004,fire Equipment Monthly Insp Incomplete.Caused by Oversight of Five Missing Items.Five Items Inspected & Surveillance Completed on 841004 (← links)
- 05000237/LER-1984-024-01, :on 841207,during Normal Operation,As Plant Personnel Were Exiting Reactor Bldg Through Interlock Doors, Secondary Containment Broken When Turbine Bldg Door Opened Before Reactor Bldg Door Closed (← links)
- 05000237/LER-1985-001-03, :on 850104,4-kV Breaker 2329 Failed to Trip Open During Breaker Differential Relay Testing.Caused by Cut Wires in Tripping Logic.Wires Reconnected (← links)
- 05000237/LER-1985-002-02, :850103,interlock Doors Simultaneously Opened. Caused by Doors Closing Too Quickly & Bouncing Back.Closure Arms for Interlock Doors Adjusted to Allow Slower Closing (← links)
- 05000237/LER-1985-012-02, :on 850309,full Scram Occurred During Reactor Protection Sys Operating Procedure.Caused by Misaligned Styrofoam Block.Relay Calibr Procedures Revised to Require Physical Jumper on Contact (← links)
- 05000237/LER-1985-011-03, :on 850306,reactor Vessel Not Vented at Less than 149 F.Caused by Lack of Procedural Steps to Ensure Vent Path Exists Prior to Completion of Head Vent Piping Replacement.Procedures Changed (← links)
- 05000237/LER-1985-009-04, :on 850221,standby Liquid Control Pump Taken Out of Svc & Required Operability Test for Redundant Pump 2B Not Performed Until 850223.Caused by Inadvertent Dept Oversight.Event Discussed W/Shift Personnel (← links)
- 05000237/LER-1985-008-05, :on 850222,reactor Scram Occurred Due to Reactor Protection Sys (RPS) Motor Generator Set B Tripping Resulting in Loss of Power to Channel A.Caused by Early Trip of Thermal Overload Relays.Relays Replaced (← links)
- 05000237/LER-1985-007-03, :on 850215,weekly Operating Surveillances Not Completed.Caused by Operator Overlooking Surveillances on Weekly Schedule Due to Another Operator Incorrectly Recording Surveillances (← links)
- 05000237/LER-1985-006-04, :on 850217,reactor Scram Occurred During Undervoltage Tests.Caused by Misunderstanding of Ae Re Power Supply Divisionalization.Power Supplies Will Be Redesigned, Rewired & Tested (← links)
- 05000237/LER-1984-025, :on 841220,main Feed Breaker 152-2430 on Bus 24-1 Failed to Trip Open.Caused by Dirty Auxiliary Breaker Contacts.Contact Cleaned,Tested & Returned to Svc (← links)
- 05000237/LER-1985-004-04, :on 850206,reactor Protection Sys Power Supply Switched from Reserve to Normal,Causing Channel B to Become Deenergized,Resulting in Full Scram.Procedure Will Be Created to Prevent Recurrence (← links)
- 05000237/LER-1985-001, :on 850104,4-kV Breaker 2329 Failed to Trip Open During Relay Testing.Caused by Four Disconnected Wires in Trip Logic.Wires Reconnected (← links)
- 05000237/LER-1984-021-03, :on 841012,full-in Limit Switch on CRD K-8 Jumpered to Prevent Refueling Block W/O Taking Rod Out of Svc to Prevent Rod Movement.Caused by Personnel Error. Operator Notified & Counseled (← links)
- 05000237/LER-1984-011, :on 840705,fire Watch Established Due to Discovery of Several Unsealed Mechanical Penetrations.All Penetrations Sealed W/Cerafiber & Vimasco (← links)
- 05000237/LER-1984-016-03, :on 840803,2,420 Gallons of Contaminated Water Spilled from Floor Drain Surge Tank Room Sump to Ground. Caused by Overfilling of Tank.Prevention of Operators from Filling Tank Above 90% & Repairs Initiated (← links)
- 05000237/LER-1984-006, :on 840208,east LPCI Corner Room Submarine Door to Torus Basement Open & Unattended.Caused by Personnel Error.Personnel Retrained (← links)
- 05000237/LER-1984-008, :on 840530,during Fire Protection Tech Spec Audit,Lack of Cardox Sys Master Valve Test in Automatic Mode Noted.Surveillance Procedure Revised to Test Valve in Both Manual & Automatic Modes (← links)
- 05000237/LER-1984-013-03, :on 840722,flow Bypass Valve FV-1 of Electro Hydraulic Control Sys Opened Causing Turbine Trip & Reactor Scram.Caused by Personnel Error.Investigation Committee Convened to Review Event (← links)
- 05000237/LER-1984-012-04, :on 840709,reactor Scrammed.Caused by Instrument Mechanic Mistakenly Turning Reactor Protective Sys Channel B Instead of Channel a Hydrogen Addition Switch to Off (← links)
- 05000237/LER-1984-014-03, :on 840109,during Normal Operations,Hpci Turbine Trip Low Pressure Surveillance Dis 2300-3 Performed Late.Caused by Personnel Error.Addl Training Provided (← links)
- 05000237/LER-1984-015-03, :on 840627,during Startup Operation,Time Pumpdown of Drywell Equipment & Floor Drain Sumps Not Performed at Proper Time.Personnel Involved Given Addl Training (← links)
- 05000237/LER-1984-011-04, :on 840705,several Mechanical Penetrations Found Not Sealed.Fire Watch Established.Penetrations Sealed W/Cerafiber & Vimasco (← links)
- 05000237/LER-1984-007-06, :on 840628,during Hot Standby,Fuse 2330-702 Removed,Causing Loss of Automatic Control for Lpci/Component Cooling Water Sys HX Delta P.Caused by Wiring Sys Using Same Fuse Circuits (← links)
- 05000237/LER-1984-010-05, :on 840626,during Startup,Feeder Breaker Position in Control Room Lost on Breaker at Bus 29 Which Feeds MCC 28-7 & 29-7.Breaker Inadvertently Tripped.Caused by Loose Wire.Operator Training Conducted (← links)
- 05000237/LER-1984-009-05, :on 840621,during Normal Operations,Feedwater Regulating Valve a Operator Vibrated Loose from Valve Stem Coupling.Caused by Vibration of Locknut.Two Sheet Metal Lock Taps Installed (← links)
- 05000237/LER-1984-005-06, :on 840618,security Computer Taken Out Svc, & Fire Detection Alarms Could Not Be Indicated.Caused by Personnel Error.Procedure Will Be Revised to Establish Controls Following Computer Outage (← links)
- 05000237/LER-1984-003, :on 840221,during Normal Operation,Core Spray Valve MO-1402-25A Failed to Operate from Control Room.Caused by Mechanical Overload of Gear Housing.Valve Control Circuitry Mod Initiated (← links)
- 05000237/LER-1984-004-02, :on 840222,during Procedure DOS 1400-2, Core Spray Valve Operability Test, Core Spray Suction Valve MO-2-1402-3A Failed to Close from Control Room.Caused by Faulty Auxiliary Breaker Contact (← links)
- 05000237/LER-1984-017-05, :on 840828,initial Fire Watch Not Completed within 1 H When Fire Detection Sys & Sprinkler Control Room Alarms Inoperable.Caused by Shift Unaware of Limitation. Shift Reviewing Fire Protection Tech Specs (← links)
- 05000237/LER-1984-008-04, :on 840530,Cardox Sys Master Valve Not Tested in Automatic Mode.Caused by Lack of Documentation to Verify That Cardox Sys electro-mechanical Master Pilot Valve Operable in Automatic Mode.Procedure Revised (← links)
- 05000237/LER-1984-006-04, :on 840208,east LPCI Corner Room Submarine Door Found Open & Unattended.Caused by Personnel Error.Door Immediately Closed & Secured & Signs Hung Emphasizing Tech Spec Requirements (← links)
- 05000237/LER-1950-237-76, /76-001:on 760101,oscillograph Alarms Received on 138-kV Yard.Bus Section 1-2 Oil Circuit Breaker Bus 1 Disconnect Arced & Glowed.Caused by Loose Connector on Cable Between Ocb & Bus 1 Disconnect on C Phase (← links)
- 05000237/LER-1984-003-05, :on 840221,core Spray Valve MO2-1402-25A Failed to Operate from Control Room.Caused by Cracked Bearing Race & Gear Housing.Work Requests Written to Modify Existing Circuitry (← links)
- 05000237/LER-1984-004-05, :on 840222,during Core Spray Valve Operability Test DOS 1400-2,core Spray Suction Valve MO-2-1402-3A Failed to Close from Control Room.Caused by Faulty Auxiliary Breaker Contact.Contacts Replaced (← links)
- 05000237/LER-1983-065-03, /03L-0:on 830917,scram Discharge Vol Vent Valve 2-0399-534 Found Locked Closed Instead of Locked Open.Caused by Valve Left Open During Previous Scram Discharge Vol Test DOS 300-7.All Locked Valves Checked (← links)
- 05000237/LER-1983-068-01, /01T-0:on 831002,during HPCI Surveillance Dis 2300-8,motor Operated Valve 2301-35 Failed to Open on Receiving Open Signal.Caused by Limitorque Valve Operator Terminal 5 Broken Lug Connector.Lug Replaced (← links)
- 05000237/LER-1983-034-03, /03L-0:on 830427,drywell Floor Drain Sump Pumped at Interval Exceeding Tech Spec Limit.Caused by Personnel Failure to Follow Operating Order 26-83 Ensuring Compliance W/Tech Spec Requiring Pumping at 4 H Interval (← links)
- 05000237/LER-1976-063-03, /03L-0:on 761003,stack Gas Sample Pump Flow Appeared Abnormally Low.Caused by Carbon Impeller Vane Products Collected in Cavity & Filter.Pump & Filter Replaced (← links)
- 05000237/LER-1976-025-03, /03L-0:on 760413,during Fuel Loading,All Personnel Not Evacuated from 613 Ft Level for Control Rod Exercising as Required.Caused by Violation of Existing Station Procedures.Procedures re-emphasized (← links)
- 05000237/LER-1976-064-03, /03L-0:on 761029,during Surveillance Test,Diesel Generator Failed to Start Twice.Caused by Malfunctioning Shutdown Solenoid on Diesel Governor.Solenoid Readjusted (← links)
- 05000237/LER-1976-029-03, /03L-0:on 760421,when Control Rod Drive R-9 Withdrawn to 02,all Rods in Relays Did Not de-energize as Required.Caused by Malfunctioning Probe Buffer Circuit Card. Card Replaced (← links)
- 05000237/LER-1976-066-01, /01T-0:on 761113,during Maint Outage,Hpci Injection Valve M02-2301-8 Found in Closed Position W/Severed Stem.Cause Undetermined.Valve Clamped in Open Position (← links)
- 05000237/LER-1976-030-03, /03L-0:on 760423,lab Analysis Showed Standby Gas Treatment Train a Iodine Removal Efficiency Below Tech Spec Limit.Caused by Deterioration of Charcoal Bed Due to High Usage.Mod Issued Installing Elapse Time Meters (← links)
- 05000237/LER-1976-031-03, /03L-0:on 760519,during Standby Liquid Control Sys Operability Testing,Approx 700 Gallons of Sodium Pentaborate Solution Leaked Into Reactor Vessel.Caused by Inadequate Procedure.Vessel Water Discharged (← links)
- 05000237/LER-1976-067-01, /01T-0:on 761203,GE Informed That Current Upper Limit of 10% Power for Required Rod Worth Minimizer Operation Not Sufficiently Conservative.Procedures Revised to Include New Upper Limit (← links)
- 05000237/LER-1976-033-03, /03L-0:on 760523,prior to Unit Startup,Diesel Generator 43 Failed to Start on First Attempt.Possibly Caused by Problem in Airstart sys.Sequential-event Checklist for Each Start Being Used to Track Problem (← links)
- 05000237/LER-1976-068-03, /03L-0:on 761212,CRD F-5 Found to Uncouple & Overtravel When Withdrawn to Position 48 Following 50% Core Scram Testing.Caused by Loosened Inner Filter.Crd F-5 to Be Disassembled & Insp (← links)
- 05000237/LER-1976-069-01, /01T-0:on 761214,notification Received from GE That MAPLHGR Limits No Longer Considered Sufficiently Conservative.Caused by Adminstrative Error.Tech Spec Rev Request Initiated (← links)
- 05000237/LER-1976-034-01, /01T-0:on 760525,during Automatic Blowdown Surveillance Testing,Relief Valve 203-3A Remained Open. Caused by Excessive Leakage in Pilot Stage of Valve.Valve Pilot & Secondary Stages Replaced (← links)
- 05000237/LER-1976-070-03, /03L-0:on 761218,diesel Generator Failed to Carry Required Load Following Monthly Surveillance.Caused by Water in Diesel Fuel Supply.Fuel Oil Day Tank Drained & Lines & Piping Flushed (← links)
- 05000237/LER-1976-035-03, /03L-0:on 760527,during Drywell Inerting,Nitrogen Storage Tank Level Dropped to 54 Inches & Remained Below 60 Inches for 2 H.Caused by Unanticipated Delay in Delivery of Nitrogen.Level Promptly Restored (← links)
- 05000237/LER-1976-071-03, /03L-0:on 761223,audit Revealed Some Surveillance Intervals Inadvertently Exceeded During 6-month Period Following Tech Spec Rev.Computer Reprogrammed to Schedule Surveillances on Weekly Basis (← links)
- 05000237/LER-1976-037-03, Reactor Protection Sys Bypass Pressure Switch Ps 2-263-51A Found to Actuate Above Tech Spec Limit.Caused by Instrument Setpoint Drift.Switch Adjusted.Monthly Insp Will Be Conducted (← links)
- 05000237/LER-1976-072-03, /03L-0:on 761228,during Start Up Operations,Crd J-11 Found to Uncouple & Overtravel When Withdrawn to Position H8.Caused by Loosened Inner Filter.Crd J-11 to Be Disassembled & Inspected (← links)
- 05000237/LER-1976-038-01, /01T-0:on 760526,sample Valve Reopened Per Procedure When Valve Discovered Closed for 40-h Period During Routine Counting of Chimney Sample Cartridges.Caused by Personnel Error (← links)
- 05000237/LER-1976-039-03, /03L-0:on 760531,LPCI & Core Spray Monthly Operability Checks Not Performed as Required by Tech Specs. Caused by Personnel Error.Lpci Subsys Operated on Several Occasion (← links)
- 05000237/LER-1976-073-03, /03L-0:on 761117 During Start Up Operations, Nitrogen Storage Tank Level Dropped Below Tech Spec Limit. Addl Nitrogen Delivered to Restore Storage Tank Level (← links)
- 05000237/LER-1976-040-03, /03L-0:on 760607,while Investigating Problem W/ Steam Jet Air Ejector 2A Flow Dropping to Zero,Thud Heard in Area.Cause Unknown.Investigation Initiated Addressing Origin & Prevention of Offgas Explosions (← links)
- 05000237/LER-1976-074-01, /01T-0:on 761228 During Start Up Operations, Control Rod J-2 Was Withdrawn One Notch.Caused by Combination of Existing Conditions Resulting in High Reactivity Worth.Normal Scram Recovery Occurred (← links)
- 05000237/LER-1977-001-01, /01T-0 on 770117,notification Received from GE That MAPLHGR Absolute Limits No Longer Considered Sufficiently Conservative.Caused by Error in MAPLHGR Calculations.Tech Spec Rev Request Initiated (← links)
- 05000237/LER-1976-041-01, /01T-0:on 760616,reactor High Pressure Scram Switches Ps 2-263-55C & a Found to Actuate Above Tech Spec Limit.Caused by Instrument Setpoint Drift.Both Switches Reset.Switch Recalibr Scheduled for Next Month (← links)
- 05000237/LER-1976-042-01, /01T-0:on 760616,reactor High Pressure Scram Switch Ps 2-263-55A & C Found Above Tech Spec Limit.Caused by Instrument Setpoint Drift.Both Switches Reset.Switch Recalibr Scheduled for Next Month (← links)
- 05000237/LER-1976-043-03, /03L-0:on 760621,during Core Boring for High Energy Line Supports in Reactor Feed Pumps,Contaminated Condensate Storage Tank B Level Indicating Line Penetrated. Caused by Contractor Error (← links)
- 05000237/LER-1976-044-03, /03L-0:on 760621,LPCI Permissive Pressure Switch 2-263-52A Found to Actuate Above Tech Spec Limit.Caused by Instrument Setpoint Drift.Switch Will Be Checked Monthly.W/ (← links)
- 05000237/LER-1976-045-03, /03L-0:on 760621,sustained High Reactor Pressure Switch 2-263-53C Found to Actuate Above Tech Spec Limit. Caused by Instrument Setpoint Drift.Switch to Be Checked Monthly (← links)
- 05000237/LER-1976-047-03, /03L-0:on 760625,unsuccessful Attempt Made to Start LPCI Pump 2C for Use in Maintaining Torus Water Temp Requirements.Caused by Malfunction of Pump Main 4 Kv Breaker Due to Dirty Contacts.Contacts Cleaned (← links)
- 05000237/LER-1976-048-03, /03L-0:on 760630,unit Operator Noticed Average Power Range Monitor Channel 5 Indication Dropped 54% to 31% Power.Caused by Broken Lead on Dc Amplifier Connection Due to Poor Soldering.Connection Repaired (← links)
- 05000237/LER-1976-049-03, /03L-0:on 760711,core Spray Outboard Injection Valve Mo 2-1402-24B Lost Open/Closed Indication & Could Not Be Electrically Reopened.Caused by Broken Contact Block in Valve Operator.Switch Replaced (← links)
- 05000237/LER-1976-050-03, /03L-0:on 760710,diesel Generator Cooling Water Pump Breaker Found in Tripped Condition.Caused by Excessive Temp in Breaker Cubicle.Breaker Reset.Pump Manually Started for Testing (← links)
- 05000237/LER-1976-051-03, /03L-0:on 760727,during Routine Surveillance Testing,Diesel Fire Pump 2/3 Failed to Start.Caused by Defective Shutdown Solenoid Valve.Valve Replaced.Engine Manually Started for Testing Purposes (← links)
- 05000237/LER-1976-052-03, /03L-0:on 760727,drywell High Pressure ECCS Initiation Switch Ps 1632A Found to Actuate at Greater than Tech Spec Limit.Cause Unknown.Switch Setpoint Immediately Adjusted (← links)
- 05000237/LER-1976-055-03, /03L-0:on 760817,post-maint Surveillance Test Performed on Standby Gas Train a Discovered Max Attainable Flow Below Tech Spec Limit.Caused by Dirty pre-HEPA Filter. Pre-HEPA Filter Replaced (← links)
- 05000237/LER-1976-057-03, /03L-0:on 760821,instrument Trip Point for Reactor Water Level Instrument 2-263-57B Isolation Found Above Tech Spec Limit.Caused by Instrument Setpoint Drift.Trip Point Adjusted (← links)
- 05000237/LER-1976-058-03, /03L-0:on 760610,core Spray Test Valve M02-1402-4B Failed to Close Against Pump Pressure.Caused by Inadequate Lubrication of Valve Stem.Valve Stem Lubricated & Valve Operated Successfully (← links)
- 05000237/LER-1976-059-01, /01T-0:on 760902,discovered That Standby Gas Treatment Sys 2/3 Deviated from Single Failure Criteria. Caused by Deficiency in Original Logic Design.Inlet Valves 2-7603 & 3-7603 Immediately Taken Out of Svc (← links)
- 05000237/LER-1976-060-03, /03L-0:on 760905,water Leakage Discovered in Diesel Generator 2/3 Room Led to Identification of Small Hole in HPCI Test Return Line.Caused by Chlorides Leaching Out & Corroding Pipe.Pipe Repaired (← links)
- 05000237/LER-1976-061-03, /03L-0:on 760915,during HPCI Test,Return Line Testing Contaminated Demineralized Water Found Leaking from Underground Pipe Into Storm Sewer.Caused by Poorly Made Weld.Line Rerouted to Facilitate Repairs (← links)
- 05000237/LER-1976-062-03, /03L-0:on 760930,diesel Generator 2/3 Control Switch Placed in Stop Position Causing Generator Output to Become Erratic W/Voltage Oscillating & ac-dc Current Meters off-scale.Caused by Shorted Selenium Rectifier (← links)
- 05000237/LER-1983-001-03, /03L-0:on 830101,cracked Weld Discovered at Feedwater Heater 2D2 Emergency Spill to Normal Drain Line Connector.Caused by Excessive Movement of Drain Line.Weld Will Be Repaired During Upcoming Refueling Outage (← links)
- 05000237/LER-1983-081-03, /03L-0:on 831210,west Side Torus Bulkhead Door Found Open.Caused by Contractor in Area.Operator Immediately Closed & Locked Door,Station Dept Heads Reminded to Inform Personnel & Memo Issued (← links)
- 05000237/LER-1983-076-03, Unidentified Drywell Leakage Calculated to Be 3.08 Gpm.Caused by Cut in Seal Ring Seating on Feedwater Check Valve Body.Cut silver-soldered & New Seal Ring Installed (← links)
- 05000237/LER-1983-078-03, While Preparing to Lower Suppression Pool Level,Valve Lpcj 1501-3A Failed to Open Remotely.Caused by Potentiometer in Valve Control Circuitry Drifting Out of Adjustment.Device Readjusted (← links)
- 05000237/LER-1983-080-03, /03L-0:on 831124,offgas Log Radiation Monitor 2-1705-A Delivered Offgas hi-hi Alarm & Hi Alarm,Spiked & Drifted Downscale.Caused by Offgas Monitor Power Supply Failure.Root Cause Unknown (← links)
- 05000237/LER-1983-156-03, /03L-0:on 831121,LPCI Valve 1501-3A Failed to Open Remotely Upon Starting Component Cooling Svc Water Sys A. Caused by Loosening of Limitorque Operator Thrust Washer Locknut.Washer Adjusted (← links)
- 05000237/LER-1983-154-03, /03L-0:on 831119,unidentified Drywell Leakage Calculated to Be 3.08 Gpm.Caused by Cut in Seal Ring Setting Area on Feedwater Check Valve Body.Cut silver-soldered & New Seal Ring Installed (← links)
- 05000237/LER-1983-072-03, /03L-0:on 831105,during Reactor Bldg to Torus Vacuum Breaker Surveillance Dis 1600-3,valve 1601-20B Failed to Open.Caused by Failed Versa Solenoid Due to Dirt Contamination.Solenoid Replaced (← links)
- 05000237/LER-1983-079-03, /03L-0:on 831018,while Testing MSIVs 1B & 2B,half Scram Received.Relay 590-102H Found Dropped Out.Caused by Misalignment of Plate Operating Actuating Arm for Limit Switch 1B.Actuating Plate Readjusted (← links)
- 05000237/LER-1983-070-03, /03L-0:on 831006,24/48-volt 2A Negative Battery Charger Tripped & Declared Inoperable.Caused by Bad Solder Joint & Badly Tarnished Edge Connectors Resulting in Failed Voltage Regulator Board (← links)
- 05000237/LER-1983-067-03, /03L-0:on 830927,all LPRMs in Levels B & D Bypassed on Front Panel.Rod Block Monitor 8 Placed in Bypass.Caused by Blown Fuse in Power Supply.Fuse Replaced & Monitor 8 Returned to Svc (← links)
- 05000237/LER-1983-069-03, /03L-0:on 831002,during LPCI Sys Valve Operability Test,Pump Suction Valve Mo 2-1501-5C Failed to Close.Caused by Faulty Auxiliary Breaker Contact GE CR 105X in Valve Control Circuitry.Auxiliary Contacts Replaced (← links)
- 05000237/LER-1983-063-03, /03L-0:on 830830,while Performing MSIV 1090 Closure Test Procedure DOS-250-1,double Indication Occurred on MSIV 2-203-1B When Test Button Released.Caused by Ground on Limit Switch 1B.Circuit Will Be Corrected (← links)
- 05000237/LER-1983-064-03, /03L-0:on 830905,control Rod Drive Scram Discharge Vol Continuous Ultrasonic Test Indication Displayed Erratic Info.Caused by Heating Steam Line Leak Above Monitor Cabinet.Leak Repaired.Module Replaced (← links)
- 05000237/LER-1984-002-04, :on 840117,standby Gas Treatment Train B Fan Discharge Damper 2/3-7507B Control Room Indication Found Inoperative.Caused by Tripped Breaker.Breaker Reset & Control Room Indication Restored (← links)
- 05000237/LER-1983-059-03, /03L-0:on 830723,drywell Oxygen Analyzer Found Not Operating.Caused by Selecting Switch Stuck in on Position Causing Overload to Stepping Switch Coil Which Burned Coil Out.Analyzer Repaired (← links)
- 05000237/LER-1983-056-03, /03L-0:on 830716,investigation of torus-to-drywell Vacuum Breaker Alarm Revealed Closed Vacuum Breaker But Limit Switch Not Made Up.Caused by Loose Switch Bracket. Switch Repositioned (← links)
- 05000237/LER-1984-001, :on 840102,two of Four Redundant Main Steam Line Low Pressure Switches Tripped Below Tech Spec Limits. Caused by Instrument Setpoint Drift.Switches Recalibr (← links)
- 05000237/LER-1983-083-03, /03L-0:on 831226,while Lowering Suppression Pool Level,Lpci 1501-3B Valve Tripped Thermally.Caused by Underrated Overload Heaters (GE CR 123 L1.74A) in Valve Motor Overload Assembly.Heaters Replaced (← links)
- 05000237/LER-1983-082-03, /03L-0:on 831225,while Performing Weekly & Daily Turbine Checks During Normal Operation,Control Valve 4 Failed to Give half-scram When Tested.Probably Caused by Failed Test Switch CVTS-4.Recorder Installed (← links)
- 05000237/LER-1982-050-01, /01T-0:on 821203,during Cribhouse Insp,Discovered Intake Water Level at 509 Ft 2 Inches.Caused by Rising River Level from Heavy Rainfall.Water Level Rose to 509 Ft 6 Inches Before Receding (← links)
- 05000237/LER-1983-066-03, /03L-0:on 830918,MSIV 2D 2.5 Closure Time Exceeded Tech Spec Requirement of 3 to 5 S.Caused by Timing Mechanism Out of Adjustment.Mechanism Adjusted (← links)
- 05000237/LER-1983-051-03, While Performing MSIV 10% Closure Test Procedure DOS 250-1,half-scram Signal Received While Testing MSIVs 1B & 2B.Relay 590-102H Found Dropped Out.Caused by Misalignment of Actuating Arm (← links)
- 05000237/LER-1983-030-03, 24-volt Low Voltage Power Supply Failed,Causing Channel a Isolation Condensor Vent Monitor,Reactor Bldg Vent & Fuel Pool Area Radiation Monitor to Go Downscale.Caused by Faulty Regulator (← links)
- 05000237/LER-1983-022-03, No Position Indication Found for Core Spray Injection Valve Mo 1402-25B.Caused by Equipment Failure & Inadequate Procedure.Breaker Replaced & Corrected Data Sheet Added to Procedure (← links)
- 05000237/LER-1983-043-03, Narrow-range Gemac (2-640-29A) & wide-range Yarway (2-263-160A) Reactor Water Level Indicators Pegged High.Caused by Loose Packing Nut on Pressure Switch 2-263-111A.Nut Tightened (← links)
- 05000237/LER-1983-050-03, /03L-0:on 830617,snubber 42 on Steam Line a Found to Have Loose Pipe Clamp Which Had Dropped 2 Inches from Normal Position.Probably Caused by Inadequate Tightening of Clamp Bolts During Original Installation (← links)
- 05000237/LER-1983-049-03, /03L-0:on 830616,while Attempting to Equalize Torus/Drywell Differential Pressure,Valves 2-1601-60 & 61 Would Not Open.Caused by Inadvertent Closure of Air Supply Isolation Valve 2-4713-512.Valve Opened (← links)
- 05000237/LER-1983-048-03, /03L-0:on 830616,during Reactor Vessel Low Water Level ECCS Initiation (DIS-500-3),level Indicating Switch 2-263-72B Tripped at 111.3 Inches Delta P.Caused by Setpoint Drift.Setpoint Adjusted (← links)
- 05000237/LER-1983-046-03, /03L-0:on 830615,after Using LPCI Sys to Lower Suppression Pool Level,Mo 2-1501-13A Failed to Reopen Upon LPCI Sys Shutdown.Caused by Valve Motor Operator Mounting Bolts Snapping Off.Bolts Replaced & Retorqued (← links)
- 05000237/LER-1983-020-03, Core Spray Injection Valve Mo 1402-25B Remained Open When Close Signal Given. Caused by Breaker Incorrectly Set Due to Procedure Inadequacy.Breaker Reset (← links)
- 05000237/LER-1983-054-03, Discovered That Containment Spray Interlocks Surveillance Dis 1500-3, Performed on 830713,was Performed 2 Days After Latest Due Date.Caused by Programming Error (← links)
- 05000237/LER-1983-023-03, /03L-0:on 830406,during Surveillance of Component Cooling Svc Water Vault Floor Drain (DOS 4400-1),condensate Pump Room Flood Switch Actuated & Drain Valve AO-2-4999-74 Failed to Close.Cause Undetermined.Investigation Underw (← links)
- 05000237/LER-1983-029-01, /01T-0:on 830418,air Leaks Found at Actuating Arms for Six torus-to-drywell Vacuum Breakers.Caused by Failure of Vacuum Breaker Actuating Arm Seals.All Seals Replaced W/ Improved Design.No Further Leakage Problems Observed (← links)
- 05000237/LER-1983-021-03, /03L-0:on 830321,diesel Generator Recirculating Lubricating Oil Pump Found Running W/No Pressure.Caused by Loosening Allen Screws.Pump Repaired & Procedure Modified (← links)
- 05000237/LER-1983-009-03, /03L-0:on 830113,during Refuel Surveillance Dis 2300-7,HPCI Switch 2370A Tripped at 204.7 F,Exceeding Tech Specs.Caused by Switch Setpoint Drift.Setpoint Adjusted.Switches Calibr During Refueling Outages (← links)
- 05000237/LER-1983-017-03, /03L-0:on 830303,while Conducting Reactor Vessel Low Water Level Scram & Isolation Surveillance Dis 500-2, Low Level Isolation Switch LIS 2-263-57A Tripped Above Tech Spec Limit.Caused by Instrument Setpoint Drift.Switch Res (← links)
- 05000237/LER-1983-018-01, /01T-0:on 830315,during Local Leak Rate Testing, 763 Std Cubic Ft Per Hour Leakage Measured Through Valve A0-1601-24.Caused by Valve Seat Surface Aging.Valve Replaced & Vol Retested (← links)
- 05000237/LER-1983-015-03, /03L-0:on 830225,leak Detected in 30-inch Suction Pipe 2223-6 of Connector Recirculation Pump a Due to Fine Edged Hole in Top Weld.Hole Caused by Stress Corrosion Cracking.Concentrator Taken Out of Svc & Pipe Repaired (← links)
- 05000237/LER-1983-016-03, /03L-0:on 830224,snubber 43 & Pipe Clamp Bolt & Nut 52 Found Loose.Caused by Personnel Omitting to Tighten Bolt & Nut During Installation.Bolt & Nut Tightened (← links)
- 05000237/LER-1983-007-03, /03L-0:on 830117,0305 & 0220,excessive Leakage Discovered Through Bypass Valves 1600-61,1601-23 & 1601-60, Respectively.Cause Not Stated.Valves Will Be Repaired & Vol Tested (← links)
- 05000237/LER-1983-013-03, /03L-0:on 830211,during Refueling,W/Weld Reinforcement in Progress Inside Torus,Power Lead from Rack of Welding Machine Grounded to Torus Causing Arc Strike & Copper/Brass to Fuse Into Metal.Repair Program Underway (← links)
- 05000237/LER-1983-014-03, /03L-0:on 830222,during Refueling Outage,Time Recorded for Offgas Discharge Valve A02-5406 to Fully Close Exceeded 15 Minute Tech Spec Limit.Cause Unknown.Timer Readjusted.Valve Timed to Close at 14 minutes,16 (← links)
- 05000237/LER-1982-043-01, Sightglass Isolation & Vent Valves Reported Open W/No Indication of Excess Make Up. Caused by Operator Error.Valves Immediately Closed. Sightglass Isolation Valves Locked Closed (← links)
- 05000237/LER-1983-040-03, /03L-0:on 830507,during MSIV 10% Closure Test Procedure DOS 250-1,NSO Received half-scram Signal on RPS Channel A.Caused by Ground on 1C Limit Switch Relay 590-102E Circuit.Ground Will Be Corrected (← links)
- 05000237/LER-1983-037-03, /03L-0:on 830504,average Power Range Monitor 4 Rod Block Setpoint Exceeded Tech Spec Limit of 12%.Caused by Instrument Drift.Monitor Adjusted & Tested Satisfactorily (← links)
- 05000237/LER-1983-042-03, /03L-0:on 830512,condenser Low Vacuum Scram Switch 503D Tripped at Vacuum of 22.8 Inches While Performing Dis 500-6.Caused by Instrument Drift.Barksdale Switch DIT-H18SS Adjusted & Exercised (← links)
- 05000237/LER-1983-039-03, /03L-0:on 830505,during Normal Operation, Unidentified Leak from Drywell Discovered.Caused by Packing Leak on Recirculation Discharge Bypass Valve 2-202-7A Causing Overflow of Equipment Drain Sump (← links)
- 05000237/LER-1983-036-03, /03L-0:on 830502,drywell Floor Drain Leakage Exceeded Tech Spec Limits Due to Bonnet Leakage on Feedwater Check Valve 2-220-58B.Caused by Failed Bonnet Seal Ring.Seal Ring Replaced.Leakage to Be Monitored (← links)
- 05000237/LER-1983-032-03, /03L-0:on 830425,during Unit Startup,Reactor Water Sample Not Pulled Every 4 H Per Tech Spec Requirements. Caused by Lack of Communication Between Technicians During Shift Change & Failure to Use Flashing Sign (← links)
- 05000237/LER-1983-041-03, /03L-0:on 830506,calibr of Drywell Pressure Switch Dis 1500-4,relay 1530-299 Failed to Pick Up When Pressure Switch 1501-620 Functionally Tested.Caused by Loose Connection in Wiring Circuitry (← links)
- 05000237/LER-1983-038-03, /03L-0:on 830505,average Power Range Monitor (APRM) 4 Flow Biased Rod Block Setpoint Found in Excess of Tech Spec Limit.Caused by Instrument Drift.Aprm 4 Adjusted Per Procedure DIS-700-6 (← links)
- 05000237/LER-1983-033-03, /03L-0:on 830426,during Testing of MSIV 1D & 2D, Half Scram Occurred on Reactor Protection Sys.Caused by Failure of Scram Interlock Contact of Limit Switch to Reset After Valve 1B Tested.Switch Adjusted (← links)
- 05000237/LER-1982-030-01, /01T-0:on 820712,during HPCI Motor Operated Valve Operability Test,Steam Supply Isolation Valve 2301-04 Failed to Close.Caused by Valve Packing Leak.Valve Repacked & Motor Replaced (← links)
- 05000237/LER-1983-028-03, /03L-0:on 830417,during Refueling,Channel B Fuel Pool Radiation Monitor Downscale Alarm Received.Alarm Could Not Be Reset.Caused by Burned Out Coil in Relay 1705-108. Relay Replaced W/Spare (← links)
- 05000237/LER-1983-002-03, Valve Mo 2-1501-19A Failed to Close During Test.Caused by Loose Wire 19A-CR109CO in Combination Starter.Terminal Tightened & Valve Successfully Cycled from Control Room (← links)
- 05000237/LER-1982-059-03, /03L-0:on 821231,valve A02-1601-55 Closed W/O Operator Action.Caused by Deteriorated Diaphragm in Solenoid on Air Operator.Solenoid Replaced & Valve Operability Verified (← links)
- 05000237/LER-1982-047-03, /03L-0:on 821117,while Performing Dis 5003,reactor Vessel Low Water Level ECCS Initiation,Lis 263-72A Found Set at 111.6 Inches Delta P.Caused by Defective Procedure.Lis 263-72A Reset & Setpoints Revised (← links)
- 05000237/LER-1982-042-01, During Normal Operation, Following Torus Hi/Lo Level Alarm,Sightglass Isolation & Vent Valves Reported Open W/No Indication of Excess Makeup. Caused by Operator Error.Valves Locked Closed (← links)
- 05000237/LER-1982-042-03, /03L-0:on 820930,control Rod Drive N-10 Overtravel Alarm Annunciated & Rod Position Indication Lost.Caused by Uncoupled Inner Filter.Drive Recoupled at Greater than 20% Power.Drive Will Be Overhauled During Next Refueling Ou (← links)
- 05000237/LER-1982-045-03, /03L-0:on 821106,during Load Reduction,All Agaf Found Greater than 1.02.Caused by Substantial Fraction of Rated Power Change Associated W/Rapid Changes in Feedwater Flow.Gain Adjustments Made to Average Power Range Monitors (← links)
- 05000237/LER-1982-046-03, /03L-0:on 821109,during Normal Operation,High Range Boron Test for Standby Liquid Control,Dcp 1100-4, Revealed Boron Concentration Below Tech Specs.Caused by Inadequate Procedure for Sys Leakage.Procedure Revised (← links)
- 05000237/LER-1982-040-03, Valve 2-1601-33A Exhibited Binding During Movement.Caused by Excess Packing Grease in Chevron Packing Seal.Packing Grease Bled Out.Valve Tested & Determined Operable (← links)
- 05000237/LER-1982-019-03, Thermocouple on Electromatic Relief Valve 2-203-3D Failed Open.Caused by Broken Ceramic Insulator in Thermocouple Head & Twisted Wires Due to Improper Installation.Thermocouple Replaced (← links)
- 05000237/LER-1982-041-03, /03L-0:on 820927,during Shutdown,Vacuum Breaker 2-1601-33F Found to Be Binding Suppression Chamber to Drywell Vacuum Breaker.Apparently Caused by Swollen Chevron Packing Seal.Packing Seal Replaced (← links)
- 05000237/LER-1982-028-03, /03L-0 Has Been Canceled (← links)
- 05000237/LER-1982-038-03, /03L-0:on 820829,during MSIV Timing Surveillance, Valves 2-203-1C & 2-203-1D Had Closed Times of 2.25-s & 2.67-s,respectively.Caused by Timing Mechanism Drift.Valves Adjusted (← links)
- 05000237/LER-1982-039-03, /03L-0:on 820829,during Drywell Inerting,Isolation Valve 2-1601-56 Would Not Close.Caused by Leakage from Fittings on Air Supply Line to Mechanical Versa Valve. Fittings Tightened & Valve Retested (← links)
- 05000237/LER-1983-004-03, /03L-0:on 830113,during Core Unloading Operations, Grapple Control Rod Interlock Would Intermittently Clear While Grapple Was Over Core.Caused by Grapple Not Maintaining Full Contact W/Rail.Limit Switch Adjusted (← links)
- 05000237/LER-1983-005-03, /03L-0:on 830112,during Refueling Outage,While Local Leak Rate Testing,Outboard MSIV 2-203-2B Leaking in Excess of Tech Specs.Caused by Valve Packing Leakage.Packing Tightened (← links)
- 05000237/LER-1982-034-03, During Power Operation, Pinhole Leak Discovered in HPCI Drain Pot Drainline to Main Condenser.Caused by Erosion.Segment of Pipe Replaced W/Schedule 80 Carbon Steel Pipe (← links)
- 05000237/LER-1982-053-03, /03L-0:on 821215,during Normal Operation,While Performing LPCI Valve Operability Surveillance,Lpci HX 2A Bypass Valve 1501-11A Position Indication Lost.Cause Unknown.Valve Successfully Operated After Breaker Reset (← links)
- 05000237/LER-1982-055-03, /03L-0:on 821217,condenser Pit High Level Alarm Received.Caused by Cracked Welds Due to Excessive Movement of Feedwater Heater 2D3 Normal Drain Line.Emergency Spill Line Rewelded.Drain Line Temporarily Supported (← links)
- 05000237/LER-1982-052-03, /03L-0:on 821215,during Normal Operation,While Performing LPCI Valve Operability Surveillance,Loop 2 Flow Test Outboard Valve 1501-38B Failed to Open.Caused by Broken Gears on Worm Shaft Clutch.Clutch Replaced (← links)
- 05000237/LER-1982-051-03, /03L-0:on 821207,during Normal Operation,Component Cooling Svc Water Pump 2B Taken from Svc W/O LPCI Operability Test.Caused by Personnel Error.Operability Test Run & Satisfactorily Completed.Procedures Reviewed (← links)
- 05000237/LER-1981-059-03, /03L-0:on 810910,while Conducting Insp on Pump 2A,CCSW Outboard Bearing Found Burned Out.Caused by Lack of Lubrication in Sealed Bearing.Bearing Replaced (← links)
- 05000237/LER-1981-020-01, During ASME Hydrostatic Test,Water Observed Seeping from Cracks in 2.5-inch Rx Head Spray Line.Caused by Chloride Induced Stress Corrosion Cracking.Cracks Cut Out & Piping Replaced (← links)
- 05000237/LER-1982-035-03, /03L-0:on 820724,offgas Flow Indicated High During Normal Startup.Caused by Cracked Fillet Weld in 2D1 Feedwater Heater Emergency Spill to Normal Heater Drain Line Connection.Weld Cracked Due to Excessive Line Movement (← links)
- 05000237/LER-1982-021-01, /-01T-0:on 820622,HPCI Sys Failed to Respond to Auto or Manual Mode of Flow Control During DOS 2300-1 Monthly Pump Operability Test.Caused by Component Failure on Amplifier Board of Controller.Amplifier Board Replaced (← links)
- 05000237/LER-1982-020-03, /03L-0:on 820609,approx 200 Gallons Concentrated Waste Found Leaking Onto First Floor of Max Recycle Bldg During Sampling Procedure.Caused by Failed Diaphragm on 1.5-inch Dump Valve AO-2/3-2012-217B (← links)
- 05000237/LER-1982-033-03, /03L-0:on 820722,reactor Water Cleanup Valve MO-2-1201-3 Failed to Close Upon Close Signal.Apparently Caused by Sticky Limit Switch Contact That Bypasses Torque Switch in Close Direction & Lack of Valve Stem Lubrication (← links)
- 05000237/LER-1982-017-03, /03L-0:on 820529,during Routine Shutdown operations,source-range Monitor 24 Failed to Select & Insert.Caused by Select Switch Contacts Failing to Operate. Switch Replaced,Monitor Tested & Returned to Svc (← links)
- 05000237/LER-1982-029-03, /03L-0:on 820712,HPCI Min Flow Valve 2-2301-14 Failed to Reclose After Opening.Caused by Control Wire Caught Under Torque Switch.Wire Secured Away from Torque Switch & Recycled to Verify Operability (← links)
- 05000237/LER-1981-066-03, /03L-0:on 811109,4.5-inch Crack Found in Joint Weld of 2D1 Feedwater Heater Emergency Spill Line to Normal Heater Drain Line.Cause Unknown.Weld Ground Out & Rewelded (← links)
- 05000237/LER-1981-055-03, Small Leak Detected in Floor Drain Discharge Line.Caused by Butt Weld Failure on Line 2/3-2014 6-inch Carbon Steel Pipe,Weakened by Corrosive Solutions.Affected Pipe Section Replaced (← links)
- 05000237/LER-1990-007-09, :on 900802,unplanned Primary Containment Group V Isolation Occurred.Cause Not Identified.Relay Circuitry & Sys Parameters Investigated Prior to Resetting Isolation Signal & Visual Observation Made (← links)
- 05000237/LER-1982-026-03, /03L-0:on 820701,MO2-1501-5C Failed to Close & Breaker Tripped.Caused by Stuck Closed Contact in Reversing Contactor Causing Short Circuit & Tripped Breaker.Contactor Replaced & Valve Successfully Cycled (← links)
- 05000237/LER-1982-025-03, /03L-0:on 820701,during Testing,Lpci Suction Valve MO-2-1501-5D Failed to Open Electrically.Caused by Dirty Auxiliary Contact in Breaker.Contact Cleaned (← links)
- 05000237/LER-1982-024-03, /03L-0:on 820629,drywell to Torus Differential Pressure Dropped to 0.94 Psid When HPCI Steam Supply Isolation Valve Mo 2-2301-4 Was Automatically Closed.Caused by Packing Leak on Valve.Valve Repacked (← links)
- 05000237/LER-1982-023-03, /03L-0:on 820623,drywell to Torus Differential Pressure Fell Below 1 Psid.Caused by Torus Pressure Transmitter 2-1623 Out of Calibr.Transmitter Recalibr (← links)
- 05000237/LER-1982-022-03, /03L-0:on 820621,while Performing LPCI Valve Operability Surveillance,Drywell Spray Header Isolation Valve 2-1501-27B Failed to Open.Caused by Spurious Trip of Thermal Overloads.Overloads Reset (← links)
- 05000237/LER-1982-018-03, /03L-0:on 820529,isolation Condenser Steam Supply Inboard Isolation Valve MO-2-1301-1 Failed to Reopen.Caused by Thermal Overload Trip Due to Slight Binding in Valve. Valve Tested Successfully & Will Be Retested Next Outage (← links)
- 05000237/LER-1982-009-03, /03L-0:on 820317,refuel Floor Hi Rad Surveillance B SBGTS Failed.A SBGTS Did Not Start Upon Failure of B. Caused by Blown Gasket on Foxboro Controller,Model 130M. a SBGTS Failure Due to Short Initiation Signal (← links)
- 05000237/LER-1982-008-03, /03L-0:on 820317,monitor Surveillance Dis 1700-7, Refueling Floor Channel a Hi Rad Monitor Became Inoperable. Caused by Wire Inadvertently Broken While Removing Connectors.Wire Repaired & Surveillance Completed (← links)
- 05000237/LER-1982-015-03, /03L-0:on 820511,during Quarterly Surveillance of Msivs,Valve 203-1D Had 2.9-s Closure Time.Caused by Timing Mechanism Drift.Valve Readjusted & Tested Satisfactorily (← links)
- 05000237/LER-1982-010-03, Pilot Cell Voltage Readings Not Taken for 24/48,125 or 250-volt Dc Batteries Per Tech Specs.Caused by Broken Fluke Voltmeter.Event to Be Reviewed W/Shift Supervisors (← links)
- 05000237/LER-1982-012-03, /03L-0:on 820407,during Semiannual QA Audit,No Info Found to Verify Instrument Check Surveillance of Temp Detectors for Safety/Relief Valves.Caused by Failure to Include Requirement Change in Tech Spec Procedures (← links)
- 05000237/LER-1982-012, Forwards LER 82-012/03L-0 (← links)
- 05000237/LER-1982-011-03, /03L-0:on 820403,LPCI Differential Pressure Switch 2-261-34B Declared Inoperable During Monthly Surveillance Test Dis 1500-9.Caused by Wear of Contact Point in Mechanical Linkage.Switch Adjusted (← links)
- 05000237/LER-1982-011, Forwards LER 82-011/03L-0 (← links)
- 05000237/LER-1982-010, Forwards LER 82-010/03L-0 (← links)
- 05000237/LER-1982-003-03, /03L-0:on 820127,leak of Over 1% Detected Through Charcoal Filters in B Standby Gas Treatment Sys.Caused by Improper Packing of Charcoal Canisters.Charcoal Beds Replaced (← links)
- 05000237/LER-1982-003, Forwards LER 82-003/03L-0 (← links)
- 05000237/LER-1982-005-03, /03L-0:on 820130,during Single Control Rod Scram Testing,Crd H-10 Failed to Scram.When Solenoid Fuses Pulled,Crd Failed to Scram.Caused by Sticking Scram Pilot Solenoid Valve.Both Valves Replaced & Tested (← links)
- 05000237/LER-1982-005, Forwards LER 82-005/03L-0 (← links)
- 05000237/LER-1982-004-03, /03L-0:on 820127,after Filling Floor Drain Sample Tank A,Ci Content Found Above Tech Spec.Caused by Failure of Conductivity Recorder in Radwaste Control Room to Indicate That Carryover Was Occurring (← links)
- 05000237/LER-1982-004, Forwards LER 82-004/03L-0 (← links)
- 05000237/LER-1989-032, :on 891210,as-left Type B & C Local Leak Rate Test Data Exceeded Tech Spec Limit of 488.452 Std Cubic Ft/H.Caused by Degradation of Telephone & Electrical Conduit Penetration Seal.Conduit Cut & Capped (← links)
- 05000237/LER-1982-006-03, /03L-0:on 820210,ATWS Div II High Pressure Transmitter 2-263-20D,read Offscale High & Tripped Light on Panel 2202-70B.Caused by Faulty Capacitor in Amplifier Circuit Board.Amplifier Circuit Board Replaced (← links)
- 05000237/LER-1982-006, Forwards LER 82-006/03L-0 (← links)
- 05000237/LER-1982-007-03, /03L-0:on 820213,during Routine Surveillance of Reactor Level Switch LIS 2-263-58B,setpoint Found to Be Above Tech Spec Limit.Caused by Instrument Setpoint Drift. Switch Adjusted (← links)
- 05000237/LER-1982-007, Forwards LER 82-007/03L-0 (← links)
- 05000237/LER-1981-061-03, During Normal Operation, Pipe Restraint 1510-12 Found Broken & 2A Component Cooling Water Loop Declared Inoperable.Caused by Air Void in Sys During Pump Startup.Hanger Redesigned (← links)
- 05000237/LER-1981-061, Forwards Updated LER 81-061/03X-1 (← links)
- 05000237/LER-1982-002-03, /03L-0:on 820122,reactor Bldg to Torus Vacuum Breaker valve,2-1601-20B,failed to Open During Surveillance, Dis 1600-3.Caused by Solenoid Valve VGS-4522 Failure Due to Hardened O Rings.Solenoid Valve Replaced (← links)
- 05000237/LER-1982-002, Forwards LER 82-002/03L-0 (← links)
- 05000237/LER-1981-078-01, /01X-1:on 811223,during Automatic Depressurization Sys Valve Surveillance,Electromatic Relief Valve 2B Failed to Open.Caused by Wire Wedge in Contact That Bypass Hold Coil.Wires Moved (← links)
- 05000237/LER-1981-078, Forwards LER 81-078/01X-1 (← links)
- 05000237/LER-1981-036-03, While Performing Auto Blowdown Permissive Surveillance 287-1,pressure Switch PS3-1554E Would Not Operate at Required Pressure.Caused by Plugged Instrument Snubber.Snubber Cleaned (← links)
- 05000237/LER-1981-080-03, /03L-0:on 811228,w/DIS-500-7 in Progress,Contacts of Time Delay Relay 590-123B/Aux Failed in Energized Position.Caused by Mechanical Binding of Actuating Mechanism.Relay Replaced (← links)
- 05000237/LER-1982-001-03, /03L-0:on 820102,hourly 2/3 Chimney Effluent Release Record Not Maintained for 33.5-h.Caused by Loss of Data Recall Ability Due to Microprocessor Problem W/New Chimney Monitoring Sys.Microprocessor Boards Redesigned (← links)
- 05000237/LER-1982-001, Forwards LER 82-001/03L-0 (← links)
- 05000237/LER-1981-079-03, /03L-0:on 811223,during Normal Operation,Diesel Fire Pump Running Alarm Annunciated in Control Room.Caused by Humidity & Dust Particles Which Actuated Ionization Type Detector.Hpci Room Fire Sys Will Be Reviewed (← links)
- 05000237/LER-1981-079, Forwards LER 81-079/03L-0 (← links)
- 05000237/LER-1981-051, Has Been Cancelled (← links)
- 05000237/LER-1981-076-03, /03L-0:on 811216,during Normal Operation,While Performing SRM Rod Block Calibr Check,Channel 23 Found to Trip at Greater than Tech Spec Limit.Caused by Setpoint Drift of Hi Alarm Potentiometer on Module Board Z16B (← links)
- 05000237/LER-1981-076, Forwards LER 81-076/03L-0 (← links)
- 05000237/LER-1981-077-03, /03L-0:on 811216,ATWS Div 2 B & D Pressure Switches Found to Be Valved Out of Svc.Caused by Instrument Mechanic Valving Error.Switches Valved Back Into Svc & Individual Cautioned (← links)
- 05000237/LER-1981-077, Forwards LER 81-077/03L-0 (← links)
- 05000237/LER-1981-074-03, /03L-0:on 811214,reactor Vessel ECCS Permissive Low Pressure Alarm Would Not Reset.Caused by Failure of Mechanic to Reopen Isolation Valve for Ps 263-52A While Backfilling safety-related Instruments.Valve Reopened (← links)
- 05000237/LER-1981-074, Forwards LER 81-074/03L-0 (← links)
- 05000237/LER-1981-073-03, /03L-0:on 811214,during Startup,Reactor Low Pressure Alarm H-16 on Control Room Panel 902-3 Indicated Isolation Condenser Initiation Pressure Switch 2-263-53C Valved Out of Svc.Caused by Personnel Error (← links)
- 05000237/LER-1981-073, Forwards LER 81-073/03L-0 (← links)
- 05000237/LER-1981-075-03, /03L-0:on 811215,during Normal Startup, Surveillance Interval Limit for Reactor Coolant Sample Was Exceeded.Caused by Miscalculation by Technician.Technician Reminded to Double Check Calculations (← links)
- 05000237/LER-1981-075, Forwards LER 81-075/03L-0 (← links)
- 05000237/LER-1981-072-03, /03L-0:on 811203,standby Gas Treatment Sys Train B Tripped Following Group II & III Isolation Signal & Declared Inoperable.Caused by Plugged Orifice on Air Flow Controller, Stopping Air Flow & Falsely Indicating Fan Flow (← links)
- 05000237/LER-1981-072, Forwards LER 81-072/03L-0 (← links)
- 05000237/LER-1981-071-03, /03L-0:on 811126,standby Gas Treatment Sys B Auto Started Following Reactor Bldg Vent Sys Trip & Position Indication Lost for Drywell Floor & Equipment Drain & Drywell Valves.Caused by Blown Burnt Relay Coil (← links)
- 05000237/LER-1981-071, Forwards LER 81-071/03L-0 (← links)
- 05000237/LER-1981-070-01, /01T-0:on 811120,core Spray Valve Operator MO2-1402-4A Found Cracked at Weld Attaching Mounting Flange to Valve Yoke.Area of Cracked Weld Ground Off & New Fillet Weld Applied.Will Continue DOS 1400-2 Monthly (← links)
- 05000237/LER-1981-070, Forwards LER 81-070/01T-0.Detailed Event Analysis Encl (← links)
- 05000237/LER-1981-060-03, While Changing Power, Daily Offgas Sample Showed Ratio of Long to short-lived Isotopes Violated Tech Spec,But Violation Not Recognized. Caused by Change in Power.Data Sheet Changed (← links)
- 05000237/LER-1981-060, Forwards Updated LER 81-060/03X-1 (← links)
- 05000237/LER-1981-069-03, /03L-0:on 811119,min Sys Pressure on Core Spray B Subsystem Maintained Via ECCS Fill Sys.Caused by Motor Operator Falling Off of Valve MO2-1402-4B Due to Poor Fillet Weld,Kepping Valve from from Closing (← links)
- 05000237/LER-1981-069, Forwards LER 81-069/03L-0 (← links)
- 05000237/LER-1981-017-03, /03L-0:on 810408,QA Audit Discovered That Temp of Cells Adjacent to Pilot Cell Had Not Been Taken,Per Tech Specs.Caused by Inadvertent Oversight Due to Inadequate Procedures.Change Will Be Implemented by June 1981 (← links)
- 05000237/LER-1981-017, Forwards LER 81-017/03L-0 (← links)
- 05000237/LER-1981-065-01, /01T-0:on 811103,during Quarterly Surveillance, MSIVs 2-203-1A,1B & 1D Had Closure Times Less than Tech Specs.Caused by Misadjusted Timing Mechanism Due to Damper Seal Misalignment.Msiv 1B Due to Normal Operation (← links)
- 05000237/LER-1981-065, Forwards LER 81-065/01T-0.Detailed Event Analysis Encl (← links)
- 05000237/LER-1981-035-03, /03L-0:on 810601,recorder Readings on Plant Chimney Discovered Below Normal Expectation.Caused by Uncoupling of Sample Line on Stack Gas Filter Assembly.Line Reconnected.Personnel Reinstructed Re Proper Lineup (← links)
- 05000237/LER-1981-035, Forwards LER 81-035/03L-0 (← links)
- 05000237/LER-1981-064-03, /03L-0:on 811029,during Pressure Suppression to Vacuum Breaker Dis 1600-3,pressure Switch Trip Point Exceeded Tech Spec.Caused by Setpoint Drift.Valve Readjusted (← links)
- 05000237/LER-1981-064, Forwards LER 81-064/03L-0 (← links)
- 05000237/LER-1981-068-03, /03L-0:on 811021,required Quarterly Storage Battery Surveillances Performed 3 Days Late.Caused by Inadvertent Oversight by Operating Shift.Reviewed Event & Will Reinforce to Personnel Need to Meet Deadlines (← links)
- 05000237/LER-1981-068, Forwards LER 81-068/03L-0 (← links)
- 05000237/LER-1981-063-03, /03L-0:on 811017,while Scram Testing,Control Rod Driveline Failed to Scram.Caused by Sticking Scram Solenoid Valve.Valve Rebuilt & Tested Satisfactorily (← links)
- 05000237/LER-1981-063, Forwards LER 81-063/03L-0 (← links)
- 05000237/LER-1981-062-03, /03L-0:on 811011,torus Water Level Exceeded Max by Approx 175 Cubic Ft.Caused by Setpoint Drift on Alarm Which Failed to Signal Excess.Setpoint Readjusted & Instrument to Be Checked Quarterly (← links)
- 05000237/LER-1981-062, Forwards LER 81-062/03L-0 (← links)
- 05000237/LER-1981-058-03, /03L-0:on 810906,during Normal Operations,Standby Gas Treatment Train B Started & Immediately Tripped on Spurious Fuel Pool High Radiation Signal.Caused by Blown Fuse Due to Short in Receptacle.Fuse Replaced (← links)
- 05000237/LER-1981-058, Forwards LER 81-058/03L-0 (← links)
- 05000237/LER-1981-054-03, /03L-0:on 810827,pressure Switch PS504D Found to Trip at 405 Psig Exceeding Tech Spec Table 3.1.1 Limits of 400 Psig.Caused by Instrument Setpoint Drift.Instrument Inspected & Microswitch Replaced.Switch Reset (← links)
- 05000237/LER-1981-054, Forwards LER 81-054/03L-0 (← links)
- 05000237/LER-1981-056-03, /03L-0:on 810828,switch 2-1632D Found Tripping at 72 Inches of Water.Caused by Wear to Switch Internals. Pressure Switch Replaced & Calibr to Tech Spec Limits. Drywell High Pressure Surveillance Will Continue Monthly (← links)
- 05000237/LER-1981-056, Forwards LER 81-056/03L-0 (← links)
- 05000237/LER-1981-050-03, /03L-0:on 810815,solenoid Air Supply Valve for Valve 1601-55 Was Determined to Be Inoperable,Preventing Valve from Closing.Caused by Sticky Solenoid.Solenoid,Asco Valve 8317A29,replaced (← links)
- 05000237/LER-1981-050, Forwards LER 81-050/03L-0 (← links)
- 05000237/LER-1981-057-01, /01T-0:on 810903,several Broken Sway Struts & High Energy Line Break Restraints Discovered on HPCI Steam Line 2-2305-10 Resulting in Sys Inoperability.Probably Caused by Excessive Line Vibration or Water Hammer (← links)
- 05000237/LER-1981-057, Forwards LER 81-057/01T-0 (← links)
- 05000237/LER-1981-048-03, /03L-0:on 810724,during Testing,Pressure Switch Ps 504C Found to Trip Outside Tech Spec Limits.Caused by Instrument Setpoint Drift.Switch Reset,But Will Be Replaced (← links)
- 05000237/LER-1981-048, Forwards LER 81-048/03L-0 (← links)
- 05000237/LER-1981-039-03, /03L-0:on 810624,pressure Switch Ps 504C Found Tripping at Rate Exceeding Tech Spec Limits.Caused by Instrument Setpoint Drift.Instrument Inspected & Switch Reset & Checked for Repeatability (← links)
- 05000237/LER-1981-039, Forwards LER 81-039/03L-0 (← links)
- 05000237/LER-1981-041-03, /03L-0:on 810624,pointer on Level Instrument 263-73A Found Hanging Up During Dis 1500-3 (Reactor Water Level Containment Spray Interlocks).Caused by Needle Rubbing on Instrument Housing.Needle Adjusted & Tested (← links)
- 05000237/LER-1981-041, Forwards LER 81-041/03L-0 (← links)
- 05000237/LER-1981-040-03, /03L-0:on 810624,relay 590-123D Failed to Drop Out After Initial Pickup W/Dis 500-7 in Progress.Caused by Contact on Auxiliary Relay 590-123D Sticking Closed.Reactor Half Scram Initiated on Affected Channel (← links)
- 05000237/LER-1981-040, Forwards LER 81-040/03L-0 (← links)
- 05000237/LER-1983-003-03, /03L-0:on 830108,during Surveillances Dis 1400-5 & DOS 6600-1,diesel Generator Low Water Pressure Alarm Received.Caused by Bad Low Cooling Water Pressure Switch. Switch Replaced W/Class 9012 Type GAW-5 (← links)
- 05000237/LER-1983-003, Forwards LER 83-003/03L-0 (← links)
- 05000237/LER-1982-058, Forwards LER 82-058/03L-0 (← links)
- 05000237/LER-1982-057-03, /03L-0:on 821224,pin Hole Leak Found in 2D3 to 2C3 Feedwater Heater Normal Drain Line.Caused by Excessive Movement of 2D3 Feedwater Heater Normal Drain Line.Mod to Add Sys Restraints Initiated (← links)
- 05000237/LER-1982-057, Forwards LER 82-057/03L-0 (← links)
- 05000237/LER-1982-056-03, /03L-0:on 821218,rod Block Setpoint of 12.2% Found on APRM 6.Caused by Setpoint Drift.Aprm 6 Bypassed While Rod Block Setpoint Readjusted (← links)
- 05000237/LER-1982-056, Forwards LER 82-056/03L-0 (← links)
- 05000237/LER-1982-049-03, /03L-0:on 821128,during Quarterly Valve Timing Surveillance DOS 1600-1,torus Inert & Purge Valve 2-1601-56 Would Not auto-close.Caused by Versa Valve Leaking from Weep Hole Due to Hardening of O-ring Seal.Valve Replaced (← links)
- 05000237/LER-1982-049, Forwards LER 82-049/03L-0 (← links)
- 05000237/LER-1978-064-03, /03L-0 on 781124:leak Found in 6x6x4 Eductor on the 2/3 Waste Collector Tank Recirculation Line.Caused by Acid Corrosion of Carbon Steel Side of Weld;Carbon Steel Flange Will Be Replaced W/Flange of Stainless Steel (← links)
- 05000237/LER-1978-033-03, /03X-1 on 780522:during Test Performed on U-2 D/G to Measure Overshoot & Overspeed Setpoint,The Diesel Tripped 4 Times Due to Overspeed Caused by Governor Speed Set Too High (← links)
- 05000237/LER-1978-063-03, /03L-0 on 781123:MSIV 2-203-1A Closed in 5.6 Seconds & MSIV 2-203-1C in 2 Seconds After Initiation Signal,Caused by MSIV 2-203-1A & MSIV 2-203-1C Valve Timing Out of Adjustment (← links)
- 05000237/LER-1978-062-03, /03L-0 on 781115:AO 1601-56 Valve Failed in Closed Position.Caused by Shorted Out Coil on Solenoid.Solenoid Coil & Fuse Replaced & Valve Verified Operational (← links)
- 05000237/LER-1978-061-03, /03L-0 on 781108:AO-2-1601-24 Failed to Close Due to Solenoid Valve Stuck Open W/Dirt in Valve Internals. Solenoid Valve Replaced,Tested & Returned to Svc (← links)
- 05000237/LER-1978-051-03, /03X-1 on 780907:during Surveillance Test Dis 1600-11,valve 2-1601-24 Failed to Operate in Specified Time Limit.Caused by Foreign Matter Lodged in Solenoid Operated 4 Way Valve,Preventing Proper Bleed Off (← links)
- 05000237/LER-1978-058-03, /03L-0 on 781018:LPCI Suction Valve MO-2-1501-5C Failed to Close During Operability Test.Failure Traced to Valve Stem Not Being Adequately Lubricated.Lubrication Interval Shortened (← links)
- 05000237/LER-1978-057-03, /03L-0 on 781013:2-1402-4b Flow Test Valve Failed to Close Fully Against Pump Pressure.Caused by Value Being Inadequately Lubricated (← links)
- 05000237/LER-1977-054-03, /03X-1 on 77-1102:during Unit 2 Refueling Outage, Control Rod drive(CRD)H-5 Overtraveled Indicating Uncoupling During Functional Testing.Caused by Unlatched Inner Filter Abnormally Long Uncoupling Rod (← links)
- 05000237/LER-1977-029-03, /03X-1 on 770802:during 1/2 Core Scram Test,Crds F-5 & H-7 Uncoupled When W/Drawn to Position 48.Caused by Unlatched Inner Filter & Abnormally Long Coupling Rod a Pull Test Has Been Incorporated Into Overhaul Procedure (← links)
- 05000237/LER-1978-056-01, /01T-0 on 781012:diff Press Switch Isolation Valve for DPIS 2-1622A Was Found Closed Because of Unknown Cause. Subj Valve Will Be Opened Slowly After Dis 1600 Survey (← links)
- 05000237/LER-1977-014-03, /03X-1 on 770402:during Normal Startup Oper,Crd H-8 Was Found to Uncouple & Overtravel When Withdrawn to Pos 48.Caused by an Unlatched Inner Filter & Abnormally Long Uncoupling Rod (← links)
- 05000237/LER-1977-022-03, /03X-1 on 770605:CRD L-5 Uncoupled & Overtraveled When W/Drawn to Pos 48.Caused by Unlatched Inner Filter & Abnormally Long Uncoupling Rod.Procedure Rev & QA Coverage Improved to Prevent Future CRD Uncouplings (← links)
- 05000237/LER-1978-015-03, /03X-1 on 770402:CRD L-5 Uncoupled & Overtraveled When W/Drawn to Pos 48.Caused by Unlatched Inner Filter & Abnormally Long Uncoupling Rod.Procedure Rev & QA Coverage Improved to Prevent Future CRD Uncouplings (← links)
- 05000237/LER-1978-052-03, /03L-0:on 780922,during Surveillance Test,Diesel Failed to Start Due to Air Start Sys Fault.Second Attempt Was Sucessful.Air Start Sys Will Be Modified to Provide Multiple Start Attempts (← links)
- 05000237/LER-1978-053-03, /03L-0 on 780926:Equip Attendent Noted Main Steam Line Flow Switch 261-2D Was Valved Out Due to Unknown Cause. Event Had Minimal Safety Significance & Switch Returned to Svc.Surveillance Sheets Wo Require Daily Check of Swit (← links)
- 05000237/LER-1978-055-01, /01T-0:on 780930,HPCI Turbine Tripped on Low Pump Suction Pressure of 11.5 Psig.Caused by Drift of Pressure Switch PS2-2360 (← links)
- 05000237/LER-1983-055-01, /01T-0:on 830719,one 1/8 by 1/16-inch Hole Found on Bellows Seal on Torus to Drywell Vacuum Breaker Line Containing Breakers 2-1601-32A & B.Cavity Filled to Original Thickness & Surface Buffed (← links)
- 05000237/LER-1983-057-03, While Performing Routine Insp,Pinhole Leak Found in 2D3 to 2C3 Feedwater Heater Normal Drain Line.Caused by Excessive Movement of 2D3 Drain Line.Mod Initiated to Add Restraints (← links)
- 05000237/LER-1983-045-03, /03L-0:on 830608,during Normal Operation,Circuit Breaker for Core Spray Injection Valve MO2-1402-25B Tripped. Caused by Incorrect Setting on Circuit Breaker,Due to Personnel Error.Breaker Set Correctly (← links)
- 05000237/LER-1983-044-03, /03L-0:on 830603,review of Area X Temp Showed Increase of Approx 25 F Due to Crack in Test Tap on MSIV 2C. Caused by Fatigue Due to Improper Support of 3/4-inch Test Connection.Steam Line Cut & Capped (← links)
- 05000237/LER-1983-035-03, /03L-0:on 830427,low Pressure Coolant Injection HX Discharge Valve MO2-1501-3B Failed to Open.Cause Undetermined.Control Circuitry Inspected by Electrical & Instrument Maint & Found Satisfactory (← links)
- 05000237/LER-1983-027-03, /03L-0:on 830408,during Valve Insp,Grease Discovered on Seats & Discs.Caused by Maint Procedures Not Prohibiting Personnel Placing Grease on Seat & Disc.Grease Removed,Valves Repaired & Procedures Will Be Revised (← links)
- 05000237/LER-1983-027, Forwards LER 83-027/03L-0 (← links)
- 05000237/LER-1983-025-03, /03L-0:on 830409,reactor Bldg Fuel Pool Channel a High Radiation Alarm Activated,Causing Reactor Bldg Vent Sys to Trip.Caused by Burned Out Relay Coil.Relay Coil Replaced (← links)
- 05000237/LER-1983-025, Forwards LER 83-025/03L-0 (← links)
- 05000237/LER-1983-024-03, /03L-0:on 830403,while Performing Core Spray Operability Test,Valve Mo 1402-4A Failed to Open.Caused by Burned Out Motor.Motor Replaced (← links)
- 05000237/LER-1983-024, Forwards LER 83-024/03L-0 (← links)
- 05000237/LER-1981-052-03, /03L-0:on 810918,during Normal Operation,Ps 504-C Switch Failed.Caused by Worn Out Micro Switch.Switch Replaced (← links)
- 05000237/LER-1981-052, Forwards LER 81-052/03L-0 (← links)
- 05000237/LER-1981-053-03, /03L-0:on 810817,trip Point of 1 Refueling Floor ARM Found to Be Above Tech Spec Limit.Caused by Setpoint Drift.Arm Alarm & Trip Setpoint Reset to Comply W/Tech Spec Requirement (← links)
- 05000237/LER-1981-053, Forwards LER 81-053/03L-0 (← links)
- 05000237/LER-1981-049-01, /01T-0:on 810814,valves 2-203-1A & 2-203-1D Had Closure Time Limits of 2.1-s & 1.7-s,respectively.Caused by Misadjusted Timing Mechanisms on Valves.Valves Adjusted (← links)
- 05000237/LER-1981-049, Forwards LER 81-049/01T-0.Detailed Event Analysis Encl (← links)
- 05000237/LER-1981-047-03, /03L-0:on 810715,required 4-h Reactor Coolant Samples Were Not Taken.Caused by Personnel Misunderstanding. Sample Taken & Analyzed & Parties Instructed of Need for Effective Communication (← links)
- 05000237/LER-1981-047, Forwards LER 81-047/03L-0 (← links)
- 05000237/LER-1981-045-03, /03L-0:on 810706,operator Received Downscale Alarm on Reactor Bldg,Fuel Pool & Isolation Condenser Vent Radiation Monitor.Caused by Power Loss Due to Loose Connection in Power Supply Cable.Cable Reconnected (← links)
- 05000237/LER-1981-045, Forwards LER 81-045/03L-0 (← links)
- 05000237/LER-1981-046-03, /03L-0:on 810709,operator Received Downscale Alarm on Reactor Bldg,Fuel Pool & Isolation Condenser Vent Radiation Monitor.Caused by Power Loss Due to Ground on Capacitor Hi-side Lead.Capacitor Replaced (← links)
- 05000237/LER-1981-046, Forwards LER 81-046/03L-0 (← links)
- 05000237/LER-1981-043-03, /03L-0:on 810702,relay 590-123B Did Not Drop Out When Turbine First Stage Pressure Exceeded 45% of Normal During Routine Load Increase.Caused by Defective Pressure Switch.Pressure Switch Defective Wiring Removed & Replaced (← links)
- 05000237/LER-1981-016-03, /03X-1:on 810408,noted That off-stream Liquid Effluent Monitor Had Not Been Functionally Tested on Monthly Basis.Caused by Deletion of Surveillance After Replacing on-stream Monitor w/off-stream Monitor (← links)
- 05000237/LER-1981-043, Forwards LER 81-043/03L-0 (← links)
- 05000237/LER-1981-016, Forwards LER 81-016/03X-1 (← links)
- 05000237/LER-1981-044-03, /03L-0:on 810703,average Power Range Monitor 6 Failed to Initiate Rod Block During Normal Operation.Caused by Failure of K-2 Relay Which Prevented Proper Operation of Relay K5.Monitor Bypassed & Relay Replaced (← links)
- 05000237/LER-1981-044, Forwards LER 81-044/03L-0 (← links)
- 05000237/LER-1981-006-01, Excessive Leakage Indicated Various Penetrations in Feedwater Check Valves. Caused by Cracked O Ring & Worn Swing Pins.Valves Repaired & Broken Components Replaced (← links)
- 05000237/LER-1981-006, Forwards Updated LER 81-006/01X-1 (← links)
- 05000237/LER-1981-005-03, During Local Leak Rate Testing,Measured Leakage of Single Isolation Valve Exceeded Tech Specs.Caused by Normal Deterioration of Valve Seat. Valve Replaced (← links)
- 05000237/LER-1981-005, Forwards Updated LER 81-005/03X-L.Deviation Rept Encl (← links)
- 05000237/LER-1981-038-03, /03L-0:on 810609,vacuum Breaker Found Binding During Suppression Chamber to Drywell Vacuum Breaker Operability Test.Caused by Improper Clearance on Shaft Seals.Seals Adjusted (← links)
- 05000237/LER-1981-038, Forwards LER 81-038/03L-0 (← links)
- 05000237/LER-1981-036-01, /01T-0:on 810602,CRD P-10 Inserted Slowly, Exceeding Limits for One Four Control Rod Array.Caused by Sticking Scram Solenoid Valve S02-0305-118.CRD Rebuilt & Returned to Svc (← links)
- 05000237/LER-1981-036, Forwards LER 81-036/01T-0 (← links)
- 05000237/LER-1981-037-03, /03L-0:on 810607 During Normal Operation,Vacuum Breaker 2-1632-D Position Indication Was Lost During Testing.Cause Unknown.Breaker Retested W/O Problem (← links)
- 05000237/LER-1981-037, Forwards LER 81-037/03L-0 (← links)
- 05000237/LER-1981-029-03, /03L-0:on 810523,generator a Recirculation Pump Motor Was Found Tripped.Probably Caused by Foreign Matter in Stator Windings Which Damaged Insulation.Motor Rebuilt (← links)
- 05000237/LER-1981-029, Forwards LER 81-029/03L-0 (← links)
- 05000237/LER-1981-024-03, /03L-0:on 810513,monthly Surveillance for Standby Liquid Control Tank Sampling Found 3 Days Overdue.Caused by Lack of Personnel Attention.Personnel Admonished.Tank Sampled (← links)
- ML080850904 (redirect page) (← links)
- 05000249/LER-2008-003, Regarding Unplanned Control Rod Withdrawals (← links)
- 05000249/LER-2008-002, From Dresden, Unit 3 Regarding Unit 3 Primary Containment Isolation Valve Declared Inoperable (← links)
- 05000249/LER-2008-001, Regarding Unit 3 Drywell Floor Drain Sump Monitoring System Declared Inoperable (← links)
- 05000237/LER-2008-003, Regarding Control Room Emergency Ventilation Air Conditioning System Inoperable Due to Excessive Vibration (← links)
- 05000237/LER-2008-004, Re Non-Conservative Core Spray Flow Utilized in LOCA Analysis (← links)
- 05000237/LER-2008-002, Unit 2 High Pressure Coolant Injection System Declared Inoperable (← links)