Pages that link to "05000387/LER-2002-001, Unit 1 Temporary Loss of Control Structure Chillers"
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The following pages link to 05000387/LER-2002-001, Unit 1 Temporary Loss of Control Structure Chillers:
Displayed 14 items.
- 05000387/LER-2002-001 (redirect page) (← links)
- 05000387/LER-2003-001 (← links)
- 05000387/LER-2002-004 (← links)
- 05000387/LER-2004-003 (← links)
- 05000387/LER-2001-003 (← links)
- 05000387/LER-2001-001 (← links)
- 05000387/LER-1982-029, Forwards LER 82-029/03L-0 (← links)
- 05000387/LER-1982-030, Forwards LER 82-030/03L-0 (← links)
- 05000387/LER-1982-028, Forwards LER 82-028/03L-0 (← links)
- 05000387/LER-1982-021, Forwards LER 82-021/03L-0 (← links)
- 05000387/LER-1982-016, Reissued LER 82-016/01T-1:on 820920,mechanical Vacuum Pump Left in Svc After Ventilation Monitoring Sys Noble Gas Monitor Became Inoperable on 820918.Caused by Operator Not Noting All Parts of Applicable Action Statements (← links)
- 05000387/LER-1982-019, Forwards LER 82-019/03L-0 (← links)
- 05000387/LER-1982-012, Forwards LER 82-012/01T-0 (← links)
- 05000387/LER-1982-017, Forwards LER 82-017/03L-0 (← links)
- 05000387/LER-1982-015, Forwards LER 82-015/03L-0 (← links)
- 05000387/LER-1982-014, Forwards LER 82-014/03L-0 (← links)
- 05000387/LER-1983-005, Forwards LER 83-005/03L-0 (← links)
- 05000387/LER-1983-002, Forwards LER 83-002/01T-0 (← links)
- 05000387/LER-1983-009, Forwards LER 83-009/03L-0 (← links)
- 05000387/LER-1983-012, Forwards LER 83-012/03L-0 (← links)
- 05000387/LER-1983-011, Forwards LER 83-011/03L-0 (← links)
- 05000387/LER-1983-013, Forwards LER 83-013/03L-0 (← links)
- 05000387/LER-1982-003, Forwards LER 82-003/01T-1 (← links)
- 05000387/LER-1982-008, Forwards LER 82-008/03L-0 (← links)
- 05000387/LER-1982-006, Forwards LER 82-006/03L-0 (← links)
- 05000387/LER-1982-067, Forwards LER 82-067/01T-0 (← links)
- 05000387/LER-1982-071, Forwards LER 82-071/03L-0 (← links)
- 05000387/LER-1982-070, Forwards LER 82-070/03L-0 (← links)
- 05000387/LER-1982-063, Forwards LER 82-063/03L-0 (← links)
- 05000387/LER-1982-066, Forwards LER 82-066/03L-0 (← links)
- 05000387/LER-1982-068, Forwards LER 82-068/03L-0 (← links)
- 05000387/LER-1982-064, Forwards LER 82-064/03L-0 (← links)
- 05000387/LER-1982-065, Forwards LER 82-065/03L-0 (← links)
- 05000387/LER-1982-058, Forwards LER 82-058/03L-0 (← links)
- 05000387/LER-1982-060, Forwards LER 82-060/03L-0 (← links)
- 05000387/LER-1982-059, Forwards LER 82-059/03L-0 (← links)
- 05000387/LER-1982-018, Forwards LER 82-018/03L-0 (← links)
- 05000387/LER-1982-020, Forwards LER 82-020/03L-0 (← links)
- 05000387/LER-1982-013, Forwards LER 82-013/03L-0 (← links)
- 05000387/LER-1982-009, Forwards LER 82-009/03L-0 (← links)
- 05000387/LER-1982-011, Forwards LER 82-011/03L-0 (← links)
- 05000387/LER-1982-010, Forwards LER 82-010/03L-0 (← links)
- 05000387/LER-1983-018, Forwards LER 83-018/03L-0 (← links)
- 05000387/LER-1983-015, Forwards LER 83-015/03L-0 (← links)
- 05000387/LER-1983-010, Forwards LER 83-010/01T-0 (← links)
- 05000387/LER-1983-014, Forwards LER 83-014/03L-0 (← links)
- 05000387/LER-1983-006, Forwards LER 83-006/03L-0 (← links)
- 05000387/LER-1983-008, Forwards LER 83-008/03L-0 (← links)
- 05000387/LER-1983-003, Forwards LER 83-003/03L-0 (← links)
- 05000387/LER-1982-074, Forwards LER 82-074/03L-0 (← links)
- 05000387/LER-1982-076, Forwards LER 82-076/03L-0 (← links)
- 05000387/LER-1982-077, Forwards LER 82-077/03L-0 (← links)
- 05000387/LER-1982-073, Forwards LER 82-073/03L-0 (← links)
- 05000387/LER-1982-075, Forwards LER 82-075/03L-0 (← links)
- 05000387/LER-1982-056, Forwards LER 82-056/03L-0 (← links)
- 05000387/LER-1982-052, Forwards LER 82-052/03L-0 (← links)
- 05000387/LER-1982-005, Forwards LER 82-05L/03L-0 (← links)
- 05000387/LER-1982-050, Forwards LER 82-050/03L-0 (← links)
- 05000387/LER-1982-049, Forwards LER 82-049/03L-0 (← links)
- 05000387/LER-1982-048, Forwards LER 82-048/03L-0 (← links)
- 05000387/LER-1982-043, Forwards LER 82-043/01T-0 (← links)
- 05000387/LER-1982-042, Forwards LER 82-042/01T-0 (← links)
- 05000387/LER-1982-047, Forwards LER 82-047/03L-0 (← links)
- 05000387/LER-1982-044, Forwards LER 82-044/03L-0 (← links)
- 05000387/LER-1982-046, Forwards LER 82-046/03L-0 (← links)
- 05000387/LER-1983-051, Forwards LER 83-051/03L-0 (← links)
- 05000387/LER-1983-046, Forwards LER 83-046/03L-0 (← links)
- 05000387/LER-1982-023, Forwards LER 82-023/03L-0 (← links)
- 05000387/LER-1982-022, Forwards LER 82-022/03L-0 (← links)
- 05000387/LER-1983-040, Forwards LER 83-040/03L-0 (← links)
- 05000387/LER-1983-026, Forwards LER 83-026/01T-0 (← links)
- 05000387/LER-1983-024, Forwards LER 83-024/03L-0 (← links)
- 05000387/LER-1983-023, Forwards LER 83-023/03L-0 (← links)
- 05000387/LER-1983-025, Forwards LER 83-025/03L-0 (← links)
- 05000387/LER-1983-022, Forwards LER 83-022/03L-0 (← links)
- 05000387/LER-1982-053, Forwards LER 82-053/03L-0 (← links)
- 05000387/LER-1982-037, Forwards LER 82-037/01T-0 (← links)
- 05000387/LER-1982-041, Forwards LER 82-041/03L-0 (← links)
- 05000387/LER-1982-035, Forwards LER 82-035/03L-0 (← links)
- 05000387/LER-1982-036, Forwards LER 82-036/01T-0 (← links)
- 05000387/LER-1982-039, Forwards LER 82-039/03L-0 (← links)
- 05000387/LER-1982-032, Forwards LER 82-032/01T-0 (← links)
- 05000387/LER-1982-038, Forwards LER 82-038/03L-0 (← links)
- 05000387/LER-1982-025, Forwards LER 82-025/01T-0.Detailed Event Analysis Encl (← links)
- 05000387/LER-1982-024, Forwards LER 82-024/01T-0 (← links)
- 05000387/LER-1982-033, Forwards LER 82-033/03L-0 (← links)
- 05000387/LER-1982-026, Forwards LER 82-026/01T-0 (← links)
- 05000387/LER-1982-079, Forwards LER 82-079/03L-0 (← links)
- 05000387/LER-1982-080, Forwards LER 82-080/03L-0 (← links)
- 05000387/LER-1982-081, Forwards LER 82-081/03L-0 (← links)
- 05000387/LER-1982-078, Forwards LER 82-078/03L-0 (← links)
- 05000387/LER-1983-001, Forwards LER 83-001/01T-0 (← links)
- 05000387/LER-1983-092, Forwards Transient Analysis & Damage Repts for Startup Transformer T-10 Failure on 830624 (Ref LER 83-092/03L-0), Fulfilling Util 830630 Commitment (← links)
- 05000387/LER-1983-054, Forwards LER 83-054/03L-0 (← links)
- 05000387/LER-1983-053, Forwards LER 83-053/03L-0 (← links)
- 05000387/LER-1983-052, Forwards LER 83-052/03L-0 (← links)
- 05000387/LER-1983-004, Forwards LER 83-004/03L-0 (← links)
- 05000387/LER-1983-007, Forwards LER 83-007/03L-0 (← links)
- 05000387/LER-1982-054, Forwards LER 82-054/03L-0 (← links)
- 05000387/LER-1982-055, Forwards LER 82-055/03L-0 (← links)
- 05000387/LER-1983-082, Requests Clerical Correction Be Made to Transmittal Ltr for LER 83-082/01T-0.Correct Ltr Number Is PLA-1741 (← links)
- 05000387/LER-1983-056, Forwards LER 83-056/03L-0 (← links)
- 05000387/LER-1983-059, Forwards LER 83-059/03L-0 (← links)
- 05000387/LER-1983-060, Forwards LER 83-060/03L-0 (← links)
- 05000387/LER-1983-058, Forwards LER 83-058/03L-0 (← links)
- 05000387/LER-1983-055, Forwards LER 83-055/03L-0 (← links)
- 05000387/LER-1983-019, Forwards LER 83-019/03L-0 (← links)
- 05000387/LER-1983-050, Forwards LER 83-050/03L-0 (← links)
- 05000387/LER-1983-049, Forwards LER 83-049/03L-0 (← links)
- 05000387/LER-1983-048, Forwards LER 83-048/03L-0 (← links)
- 05000387/LER-1983-044, Forwards LER 83-044/03L-0 (← links)
- 05000387/LER-1983-045, Forwards LER 83-045/03L-0 (← links)
- 05000387/LER-1983-043, Forwards LER 83-043/01T-0 (← links)
- 05000387/LER-1983-033, Forwards LER 83-033/01T-0 (← links)
- 05000387/LER-1983-038, Forwards LER 83-038/03L-0 (← links)
- 05000387/LER-1984-047, Forwards LER 84-047-00,originally Issued on 841130.LER Reissued Due to Apparent Distribution Problems (← links)
- 05000387/LER-1983-042, Forwards LER 83-042/03L-0 (← links)
- 05000387/LER-1983-041, Forwards LER 83-041/03L-0 (← links)
- 05000387/LER-1983-036, Forwards LER 83-036/03L-0 (← links)
- 05000387/LER-1983-039, Forwards LER 83-039/03L-0 (← links)
- 05000387/LER-1983-035, Forwards LER 83-035/03L-0 (← links)
- 05000387/LER-1983-037, Forwards LER 83-037/03L-0 (← links)
- 05000387/LER-1983-031, Forwards LER 83-031/03L-0 (← links)
- 05000387/LER-1983-034, Forwards LER 83-034/03L-0 (← links)
- 05000387/LER-1983-030, Forwards LER 83-030/03L-0 (← links)
- 05000387/LER-1983-021, Forwards LER 83-021/01T-0 (← links)
- 05000387/LER-1983-027, Forwards LER 83-027/03L-0 (← links)
- 05000387/LER-1983-028, Forwards LER 83-028/03L-0 (← links)
- 05000387/LER-1983-032, Forwards LER 83-032/03L-0 (← links)
- 05000387/LER-1983-029, Forwards LER 83-029/03L-0 (← links)
- 05000387/LER-1983-017, Forwards LER 83-017/03L-0 (← links)
- 05000387/LER-1983-016, Forwards LER 83-016/03L-0.Detailed Event Analysis Encl (← links)
- 05000387/LER-1982-057, Forwards LER 82-057/03L-0 (← links)
- 05000387/LER-1983-020, Forwards LER 83-020/03L-0 (← links)
- 05000387/LER-2024-002, B Diesel Generator Inoperable Due to Failed Excitation System Linear Reactor (← links)
- 05000387/LER-2023-004, Manual Reactor Scram Due to Degraded Main Condenser Vacuum (← links)
- 05000387/LER-2023-004-01, Manual Reactor Scram Due to Degraded Main Condenser Vacuum (← links)
- 05000387/LER-2024-001-01, Main Steam Isolation Valve Leakage Due to Valve Body Seat Wear (← links)
- 05000387/LER-2024-001, Main Steam Isolation Valve Leakage (← links)
- 05000387/LER-2023-003, D Diesel Generator Inoperable Due to Clogged Fuel Injectors (← links)
- 05000387/LER-2023-002, Unplanned Lnoperability of the High Pressure Coolant Injection (HPCI) System Due Failure of the HPCI Turbine Stop Valve to Fully Close, Most Likely Due to Internal Corrosion and (← links)
- 05000387/LER-2023-001, Inadvertent Contact Between Relay Cover and Relay Trip Contacts Resulted in Automatic Actuation of the ‘B’ Emergency Diesel Generator (← links)
- 05000387/LER-2022-003, Inoperable 13.8kV Startup Transformer Due to Misaligned Load Tap Charger Local/Remote Control Switch (← links)
- 05000387/LER-2022-002-01, Automatic Reactor Scram Due to Reactor Protection System Actuation on High Reactor Vessel Pressure Signal Following Inadvertent Closure of Inboard Main Steam Isolation Valve (← links)
- 05000387/LER-2022-001-01, From Susquehanna Steam Electric Station Unit 1 - Main Steam Line Isolation Valve Leakage Due to Seating Surfaces Wear and Material Deposits (← links)
- 05000387/LER-2022-002, Automatic Reactor Scram Due to High Reactor Vessel Pressure Following Inadvertent Closure of Inboard Main Steam Isolation Valve (← links)
- 05000387/LER-2022-001, Main Steam Isolation Valve Leakage (← links)
- 05000387/LER-2021-005-01, Automatic Reactor Scram Due to Turbine Control Valve Fast Closure (← links)
- 05000387/LER-2021-004-01, Loss of 1B RHRSW Pump Due to Cable Damage During Excavation Activities (← links)
- 05000387/LER-2021-005, Automatic Reactor Scram Due to Turbine Control Valve Fast Closure (← links)
- 05000387/LER-2021-004, Loss of 1B RHRSW Pump Due to Cable Damage During Excavation Activities (← links)
- 05000387/LER-2021-003-01, Automatic Reactor Scram Due to Main Turbine Trip Caused by a C Isophase Bus Ground Fault (← links)
- 05000387/LER-2021-003, Automatic Reactor Scram Due to Main Turbine Trip (← links)
- 05000387/LER-2018-005-02, (SSES) Unit 1 Re Condition Prohibited by Technical Specifications Due to Drift of Reactor Pressure Switches (← links)
- 05000387/LER-2017-010-02, Condition Prohibited by Technical Specifications Due to Drift of Reactor Pressure Switches (← links)
- 05000387/LER-2021-002, Inoperability of Computer Room Floor Cooling Fan Caused by Extended Operation with Worn Belts Due to Less than Adequate Preventive Maintenance Replacement Interval (← links)
- 05000387/LER-2021-001, Electri Station, Unplanned Lnoperability of the High Pressure Coolant Injection (HPCI) System Due to a Primary Containment Isolation (PCIV) Valve Failure to Stroke Full Closed On-demand Due to an Intermittent Break (← links)
- 05000387/LER-2020-002-01, Inoperability of Unit 1 B Residual Heat Removal Service Water Pump Due to the Circuit Breaker Spring Charging Motor Contact Actuator Being Out of Adjustment (← links)
- 05000387/LER-2020-001, 0l for Susquehanna Steam Electric Station Unit 1 Re Automatic Reactor Scram Due to Main Turbine Trip Caused by an Electrical Ground Path in the B Main Transformer (← links)
- 05000387/LER-2020-003, Condition Prohibited by Technical Specifications Due to Inoperable Turbine Stop Valve and Turbine Control Valve Instrumentation (← links)
- 05000387/LER-1986-035, :on 861003,discovered That Diesel Generator a Could Not Be Synchronized W/Offsite Power.Caused by Stripped Lug in Speed Control Circuit.Lug Repaired & Generator Returned to Svc.Event Reviewed W/Personnel (← links)
- 05000387/LER-1986-033, :on 860925,door Latch Stuck Due to Being Dirty. Door Latch Removed,Cleaned & Reinstalled.Limiting Condition for Operation Statement 3.0.3 Cleared When Door Returned to Svc (← links)
- 05000387/LER-1986-032, :on 860923,Limiting Condition for Operation 3.0.3 Entered & Cleared Four Times to Perform Surveillances on Engineered Safeguard Sys Buses.Caused by Loss of Both Channels of Degraded Voltage Protection (← links)
- 05000387/LER-1986-036, :on 861024,Limiting Condition for Operation 3.0.3. Entered & Cleared Four Times to Perform Surveillances on 4.16 Kv Engineered Safeguard Sys Buses.Tech Spec Change Request to Clarify Table 3.3.3-1 Submitted (← links)
- 05000387/LER-1986-041, :on 861226,Limiting Condition for Operation 3.0.3 Entered Six Times to Sample Suppression Chamber.Caused by Excessive Leakage from Blower Vents in Containment Radiation Monitoring Sys.Procedures Revised (← links)
- 05000387/LER-1986-028, :on 860801 & 06,various Trips & Isolation Occurred.Caused by Transfer of Bus 10 Loads to Bus 20 Due to Lightning Strikes to 230 Kv Transmission Line.New Breaker Tested & Installed & Units Stabilized (← links)
- 05000387/LER-1986-042, :on 861227,Limiting Condition for Operation 3.0.3 Entered & Cleared Four Times to Perform Surveillance on 4.16 Kv Engineered Safeguard Sys Buses.Tech Spec Change Request Submitted to Clarify Action Statements (← links)
- 05000387/LER-1987-003, :on 870127,diesel Generator Trip Alarm Investigation Necessitated Declaring One Diesel Generator Inoperable When Second Diesel Generator Already Inoperable. Cause & Corrective Actions to Be Filed Later (← links)
- 05000387/LER-1986-038, :on 861113,railroad Access Shaft Exhaust Radiation Monitor Tripped,Causing ESF Actuations.Caused by Personnel Error.Esf Sys Restored to Normal.Radiation Monitors Will Be Labeled Per Plant Program (← links)
- 05000387/LER-1987-002, :on 870119,Limiting Condition for Operation 3.0.3 Entered & Cleared Four Times to Perform Surveillances on 4.16 Kv Buses.Caused by Loss of Both Channels of Degraded Voltage Protection.Tech Spec Change Requested (← links)
- 05000387/LER-1986-014, :on 860410,during Refueling Outage,Scram Discharge Vol (SDV) Level Transmitters Found Isolated from Sdv.Caused by Transmitters Being Locked Closed & Incorrect Checkoff List (← links)
- 05000387/LER-1986-031, :on 860829,reactor Protection Sys Distribution Panel Circuit Breaker Opened for Planned Maint Resulting in Unplanned ESF Actuations.Caused by Failure to Make Proper Correlation.Circuit Breaker Reclosed (← links)
- 05000387/LER-1986-030, :on 860825,Limiting Condition for Operation 3.0.3 Entered & Cleared Four Times to Perform Surveillances on 4.16 Kv Engineered Safety Sys Buses.Caused by Tech Spec Discrepancy.Tech Spec Being Changed (← links)
- 05000387/LER-1986-006, :on 860304,Div II LOCA Isolation Signal Generated.Caused by Power Interruption to LOCA Logic While Loose States Link Being Tightened.No Corrective Actions Planned (← links)
- 05000387/LER-1987-001-01, :on 870109,two RWCU Sys Automatic Isolations Occurred Due to High Flow.Caused by Operations Personnel Failing to Verify Sys Filled & Vented Prior to Placing Sys in Svc After Maint.Sys Refilled & Vented (← links)
- 05000387/LER-1987-005, :on 870212,isotopic Analysis for Iodine Not Performed During Power Reduction for Control Rod Sequence Exchange & Recirculation Pump Motor Generator Brush Change Out.Caused by Operator Error.Sample Performed (← links)
- 05000387/LER-1986-040, :on 861210,w/containment Radiation Monitoring (Crm) Sys B Inoperable,Crm a Removed from Svc for Monthly Surveillance Testing,Resulting in Condition Prohibited by Tech Specs.Crm Returned to Svc After Testing (← links)
- 05000387/LER-1986-025, :on 860627,both Channels of Degraded Voltage Protection Inoperable While Limiting Condition for Operation 3.2.3 Entered & Cleared Eight Times to Perform Surveillance Testing.Tech Spec Change Requested (← links)
- 05000387/LER-1986-039, :on 861202,Limiting Condition for Operation 3.0.3 Entered During Suppression Pool Nitrogen Addition & Purging.Caused by Leakage in Containment Radiation Monitoring Sys.Sys Isolated (← links)
- 05000387/LER-1986-037, :on 861124,Limiting Condition for Operation 3.0.3 Entered & Cleared Four Times to Perform Surveillances on 4.16 Kv Engineered Safeguard Sys Buses.Tech Spec Change Request Submitted (← links)
- 05000387/LER-1986-029, :on 860816,initiations of Standby Gas Treatment & Control Room Emergency Outside Air Supply Sys B Occurred.Caused by Defective GE Electrical Protection Assembly Board (Epa).Board Replaced (← links)
- 05000387/LER-1986-027, :on 860725,w/Unit 1 Operating at 100% Power & Unit 2 Operating at 79% Power,Limiting Condition for Operation 3.0.3 Entered to Perform Surveillance Testing.Tech Spec Change Requested to Clarify Action (← links)
- 05000387/LER-1986-021, :on 860524,controlled Shutdown Initiated When All Emergency Svc Water (ESW) Sys Pumps Declared Inoperable. Caused by 860522 Failure of ESW Pump C Due to Severe Cavitation Damage.Pumps Repaired (← links)
- 05000387/LER-1986-026, :on 860623,determined That Available Weight of Sodium Pentaborate in Standby Liquid Control Sys Storage Tank Below 5,330 Lbs as Required by Tech Spec 3.1.5. Chemicals Added & Solution Retested (← links)
- 05000387/LER-1985-027, :on 850809,offgas Pretreatment Radiation Monitors Declared Inoperable.Caused by Determination That Tech Spec 4.3.7.11-1.4 Surveillance Requirement Not Met.New Surveillance Procedures Prepared (← links)
- 05000387/LER-1985-010-01, :on 850313,during Cavity Draining Process, Refuel Floor High Exhaust Radiation Monitor Channel a Tripped.Caused by Shine Associated W/Lowering Reactor Cavity Water Level.Caution Added to Procedures (← links)
- 05000387/LER-1983-087-03, /03X-1:on 830527,containment a H2/O2 Analyzers Found to Have Erratic Readings.Caused by Degradation of Pressure Control Valve & Sample Pump.Failed Components Replaced (← links)
- 05000387/LER-1987-006, :on 870220,loss of Both Channels of Degraded Voltage Protection Occurred Due to Performance of Monthly Degraded Voltage Testing.Tech Spec Change Request Initiated to Clarify Action Statements (← links)
- 05000387/LER-1986-010, :on 860327,both Access Hatches to Reactor Bldg Ventilation Sys Recirculation Plenum Found Open,Affecting Secondary Containment Integrity.Caused by Maint Personnel Error.Future Work Plans Modified (← links)
- 05000387/LER-1986-012, :on 860328,Train B of Standby Gas Treatment Sys & Control Room Emergency Outside Air Supply Sys Started W/Invalid Div II LOCA Signal.Caused by Blown Fuse by Electrician.Work Practices Emphasized (← links)
- 05000387/LER-1986-011, :on 860325,reactor Protection Sys Actuated. Caused by Maint Personnel Error,Resulting in Upscale Spike from Intermediate Range Monitor.Existing Procedures Adequate.No Further Action Planned (← links)
- 05000387/LER-1986-024, :on 860703,discovered That Automatic Pump Start Relays Not Seismically Qualified.Cause Not Stated.Relays Replaced (← links)
- 05000387/LER-1986-008, :on 860314,six Inadvertent Actuations of Reactor Protection Sys Channel a Occurred.Probably Caused by CRD Changeout Activities in under-vessel Area.Changeout Effort Will Be Reviewed W/Foremen (← links)
- 05000387/LER-1986-023, :on 860612,ESF Actuation Occurred Due to EPA Breaker Trip.Caused by High Internal Temp as Result of Loose Breaker Contact Mounting Screw.Screw Tightened & Breaker Returned to Svc (← links)
- 05000387/LER-1986-022, :on 860601,start-up Bus 20 Deenergized,Causing Loss of Power.Caused by Cycling of Circuit Breaker 3T.Work Plans Reviewed & Sys Operating Instructions Revised (← links)
- 05000387/LER-1986-020, :on 860516,during Testing of Outside Air Intake Process Radiation Monitor B,Emergency Outside Air Supply Sys Train B Actuated.Caused by Jumper Not Making Contact W/ Terminals.Test Jacks Will Be Installed (← links)
- 05000387/LER-1986-019, :on 860428,limiting Condition for Operation Action Statement 3.0.3 Entered Three Times to Perform Surveillance on 4.16 Kv Bus Undervoltage Relays.Caused by Absence of Action Statement (← links)
- 05000387/LER-1986-017, :on 860414,isolations of Reactor Bldg Ventilation Zones I & II Occurred,Causing Standby Gas Treatment Sys & Emergency Outside Air Sys to Initiate.Caused by Improper Performance of Procedure (← links)
- 05000387/LER-1986-018, :on 860415,LOCA Isolation & Half Scram Caused Shutdown of Cooling,Isolation of HVAC Sys & Initiation of Standby Gas Treatment Sys.Caused by Arc When Test Lead Bumped Off.Review of Sys Underway (← links)
- 05000387/LER-1986-016, :on 860412,automatic Scram Signal Generated on Reactor Protection Sys When Reactor Vessel Water Level Dropped.Caused by Vessel Level Indication Error Resulting from Valve Pack Leak.Event Reviewed by Staff (← links)
- 05000387/LER-1986-015, :on 860415,Div II LOCA Isolation Occurred, Causing Isolation of Zones I & III HVAC Sys,Initiation of Standby Gas Treatment Sys B & Control Room Emergency Outside Air Supply Sys B.Caused by Blown Fuse (← links)
- 05000387/LER-1986-034-01, :on 860925,discovered That Drywell Hydrogen Analyzer Channel a Inoperable Since 860626.Caused by Replacement Amplifier Board Having Soldered Wire Connector Installed in Circuitry.Connector Replaced (← links)
- 05000387/LER-1986-013, :on 860402,procedure Deficiency Caused Div I of Reactor Bldg Zone III Ventilation Sys to Isolate & Standby Gas Treatment Sys to Initiate.Procedure Will Be Revised to Disable Isolation Logic (← links)
- 05000387/LER-1986-007, :on 860315,unplanned Div I LOCA Isolation Occurred When Fuse Blew in Nuclear Steam Supply Shutoff Sys Logic.No Specific Cause Determined.Fuse Replaced & Isolation Logic Reset (← links)
- 05000387/LER-1986-009, :on 860315,half Scram Signal Generated on Div I of Reactor Protection Sys Due to Noise Induced Upscale Trip of intermediate-range Monitors C & G.Caused by Relay Cycling.Actuation Cleared (← links)
- 05000387/LER-1986-004, :on 860129,standby Gas Treatment Sys Train a Manually Initiated to Maintain 0.25 Inch Wg Vacuum in Secondary Containment.Caused by Unanticipated Actuation of Esf.Actuator Air Regulator Adjusted (← links)
- 05000387/LER-1986-005, :on 860228,Zone III of Reactor Bldg Ventilation Isolated on High Railroad Access Shaft Radiation.Caused by Increase in Background Radiation Due to Shine from CRD Mechanisms.Lead Shields Installed (← links)
- 05000387/LER-1986-003-01, :on 860216,partial Loss of Power Occurred to Div I Nuclear Steam Supply Shutoff Sys.Caused by Mislabeling of Four of Eight Breakers.Breakers Relabeled (← links)
- 05000387/LER-1984-044, :on 840613,average Rod Scram Insertion Time Required by Tech Spec 3.1.3.4 Not Met for All Rods. Apparently Caused by Poor Control Rod Scram Pilot Valve Performance.Valves Modified (← links)
- 05000387/LER-1985-032, :on 851011 & 13,RWCU Sys Spilled Process Water & Resin Resulting in Isolation.Caused by Erosion of Valve Seat FV-14566A & Inadequate Single Valve Isolation.Valve Seat Replaced.Valve Control Circuitry Modified (← links)
- 05000387/LER-1985-032-01, Forwards LER 85-032-01,describing RWCU Sys Isolation Valve Actuation.Rev Submitted to Incorporate Attachment 1, Simplified Drawing of RWCU Sys 1A Filter Demineralizer, Inadvertently Excluded from Initial Submittal (← links)
- 05000387/LER-1986-002-01, :on 860206,during Performance of 31-day Chemistry Surveillance,Available Weight of Sodium Pentaborate Less than Tech Spec Limit of 5,500 Lb.Caused by Improper Valve Closure.Valve Closed Tightly (← links)
- 05000387/LER-1985-030, :on 851028,reactor Scram Occurred Due to Collapse of Core Steam Voids & Shrinkage of Reactor Vessel Water Level.Caused by Fuse Blowing Concurrent W/Performance of Surveillance Procedure Requiring Half Scram (← links)
- 05000387/LER-1985-023, :on 850611,manual Isolation Valve 141005 Found Open.Caused by Inability to Perform Required Surveillance Testing on Excess Flow Check Valve XV-141F009.Procedures Revised (← links)
- 05000387/LER-1986-001, :on 860110,two Divs of Control Room Emergency Outside Air Supply Sys Declared Inoperable Resulting in Four Dampers Not Being Tested.Caused by Procedure Deficiency. Dampers Tested.Procedures Will Be Reviewed (← links)
- 05000387/LER-1985-031, :on 851030,turbine Trip Initiated Reactor Scram from 64% Due to Moisture Separator B Drain Tank High Level. Caused by Surge of two-phase Flow at Lowest Level of Turbine cross-around Piping (← links)
- 05000387/LER-1985-035, :on 851216,bus 10 Loads Transferred to Bus 20 Due to 230-kV Transmission Sys Fault.Fault Caused Momentary Loss of Power to Units 1 & 2.Units Stabilized & Affected Sys Restored (← links)
- 05000387/LER-1985-033, :on 851023,noble Gas Sample Taken 3 h,45 Minutes Late.Caused by Personnel Error.Chemistry Instruction Will Be Written to Provide Guidance to Technicians on Sampling & Recordkeeping (← links)
- 05000387/LER-1985-026, :on 850624,during Testing of HPCI Sys,Oil Leak Discovered on HPCI Steam Stop Valve Oil Supply Flange. Caused by Loose Nuts Securing Stop Valve Oil Supply Flange. Nuts Torqued & Leak Test Performed (← links)
- 05000387/LER-1984-048, :on 841221,valve Seats in Nitrogen Purge Lines Leaked Excessively.Caused by Unauthorized Discharge of Nitrogen.Valves Disassembled & Repaired (← links)
- 05000387/LER-1985-029, :on 850910,inservice Insp Surveillance Requirements of Tech Spec 4.0.5 Not Performed within Required Time Frame.Caused by Plant Engineering Group Error. Surveillance Completed (← links)
- 05000387/LER-1985-025, :on 850619,B Trains of Standby Gas Treatment & Control Room Emergency Outside Air Supply Sys Actuated Due to Trip of Exhaust Duct Radiation Detector B.Caused by Buildup of Contaminated Particles (← links)
- 05000387/LER-1985-028, :on 850823,HPCI Sys Declared Inoperable Due to HPCI Inboard Steam Supply Valve Isolation.Caused by Technician Inadvertently Connecting Test Equipment to Wrong Terminal Points.Valve Reopened (← links)
- 05000387/LER-1985-024, :on 850609,HPCI Declared Inoperable Due to Inability to Meet Flow & Discharge Pressure Requirements. Caused by Incorrect High Speed Setting of Turbine Control Sys.High Level Signal cut-off Raised (← links)
- 05000387/LER-1985-012, :on 850404,determined That Four Fire Dampers in Standby Gas Treatment Sys Ductwork Not Included in Surveillance Procedures & Fire Watch Not Verified.Fire Watch Implemented (← links)
- 05000387/LER-1985-016, :on 850425,five Emergency Svc Water & Control Structure Chilled Water Sys Suveillances Completed Late. Caused by Mods to Sys & Problems W/Weekly Surveillance Schedule.Schedule Revised (← links)
- 05000387/LER-1985-013-01, :on 850416,alternate Sampling for Turbine Bldg Lost Once & for Reactor Bldg Lost Twice.Caused by Circuit Overload,Resulting in Tripped Circuit Powering Sample Pumps. Alternate Power Supplies Being Investigated (← links)
- 05000387/LER-1985-022, :on 850528,loss of Zone I & Zone III Reactor Bldg Ventilation Occurred,Causing Automatic ESF Actuation. Caused by Communication Error Between Personnel Conducting 18-month Logic Sys Test.Personnel Counseled (← links)
- 05000387/LER-1985-014-01, :on 850413,loss of Power Initiated Isolation of HVAC Zone III & Started Standby Gas Treatment Sys & Control Room Emergency Outside Air Supply Sys Train A.Caused by Open Circuit Breaker.Breaker Closed (← links)
- 05000387/LER-1985-015, :on 841213,portions of Upper Cable Spreading Room Structural Steel Found W/O Requisite 3 H Fire Proofing. Caused by Intentional Cutouts to Facilitate Installation. Fire Watch Established on 850409 (← links)
- 05000387/LER-1985-018, :on 850513 & 14,unanticipated Actuation of Reactor Protection Sys Ocurred When Intermediate Range Monitor Spuriously Tripped Upscale.Caused by Shorting Links Being Removed from Reactor Protection Sys (← links)
- 05000387/LER-1985-019, :on 850516,reactor Protection Sys Actuation Occurred When Intermediate Range Monitor C Mistakenly Taken Out of Bypass.Caused by Telcon Misunderstanding.Personnel Counseled (← links)
- 05000387/LER-1985-017, :on 850505,reactor Water Cleanup Sys Containment Outboard Isolation Valve Closed on High Flow Signal Causing Unanticipated ESF Actuation.Caused by Higher Differential Pressure When Sys Runs Cold (← links)
- 05000387/LER-1985-011-01, :on 850323 & 0402,refuel Floor Radiation Monitors Tripped & Started ESF Sys.Caused by Radiographic Testing.Esf Starts Unavoidable Due to Detector Location Near Testing.Testing Suspended & HVAC Sys Restored (← links)
- 05000387/LER-1984-011, :on 840301,two Initiations of Control Room Emergency Outside Air Supply Sys & Standby Gas Treatment Sys Occurred.Caused by Voltage Drop & Incorrect Removal of Test Jumper Cables (← links)
- 05000387/LER-1985-009-01, :on 850310,11 & 28,inadvertent ESF Actuations Occurred.Caused by Welding in Vicinity of Detectors,Inducing Noise in Instrumentation.Radiation Loop Reset & Tested (← links)
- 05000387/LER-1985-008-01, :on 850302,standby Gas Treatment Sys & Control Room Emergency Outside Air Supply Sys Actuated.Caused by Electricians Working on Mod to Reactor Protection Sys B Alternate Power Source Transformer (← links)
- 05000387/LER-1984-049, :on 841214,suppression Chamber Purge Initiated W/O Required Sampling & Analyses.Caused by Personnel Error. Procedure Rev Initiated & Personnel Counseled (← links)
- 05000387/LER-1985-007-02, :on 850216,breaker Supplying Instrument Bus Opened,Causing Isolation of Reactor Water Cleanup Sys on False Signal.Caused by Loss of Power to Temp Sensor Trip Circuitry.Addl Training for Operators Provided (← links)
- 05000387/LER-1984-042, :on 840926,significant Operating Occurrence Rept Written,Detailing Occurrences Between 831223-840329 When Chemistry Samples Not Taken within Specified Time Limits (← links)
- 05000387/LER-1984-040, :on 840910,diesel Generator D Tripped on High Turbo Charger Vibration During Monthly Operability Test. Caused by Radial Turbo Charger Bearing Failure.On 840911,RHR Full Flow Test Valve Failed (← links)
- 05000387/LER-1982-054-01, /01X-1:on 821115,during Startup Testing Program, Drywell Temp Exceeded Tech Spec Limit of 135 F.Caused by Drywell Chiller Tripping While Standby Unit Out of Svc for Maint.Drywell Coolers Turned on (← links)
- 05000387/LER-1984-041, :on 840909,chemistry Sampling Not Performed within Tech Spec Limits.Caused by Lack of Proper Notification.On 840904,turbine Sys Monitor Taken Out of Svc (← links)
- 05000387/LER-1985-003-01, :on 850124,unit Scrammed on Main Turbine Control Valve Fast Closure Signal Resulting from Main Generator Lockout.Caused by Ice Formations in Main Generator a & C Isophase Bus Ducts at Low Point in Ducts (← links)
- 05000387/LER-1985-005-01, :on 850213,verification of 6 Plus or Minus 1 Simulated Thermal Power Time Constant Inadvertently Omitted from Routine Surveillance Testing for Aprms.Time Constant Since Verified (← links)
- 05000387/LER-1985-006-01, :on 850213,monthly Composite Sample Analyses Not Completed.Caused by Dec Aliquots Added to Wrong Monthly Composite Container.Procedure Changes Made to Prevent Recurrence (← links)
- 05000387/LER-1985-001-01, :on 850213,while Removing Jumpers from Refuel Floor Wall Duct Trip Units,Zone III Isolated on High Radiation Signal.Caused by Reactor Bldg Recirculation Fans Not Starting.Investigation Continuing (← links)
- 05000387/LER-1984-046, :on 840822,QC Inspector Found Open Penetration in Ceiling of Lower Cable Spreading Room.Caused by Fire Barrier Not Being Included in Surveillance Procedure. Procedure Revised (← links)
- 05000387/LER-1984-045, :on 841018,failure to Perform 18-month Surveillance of Scram Discharge Vol Vent & Drain Valves Since 820113 Discovered.Caused by Personnel Error.Person Assigned to Review Surveillance Program (← links)
- 05000387/LER-1985-004-01, :on 850129,diesel Generator B Tripped After 8 Minutes of Operation.Caused by Actuation of Connecting Rod Bearing High Temp Detector Vent Valve.Maint Personnel Will Perform Addl Insp (← links)
- 05000387/LER-1985-002-01, :on 850121,diesel Generators a & D Failed to Start in Violation of Tech Spec Requirements.Caused by Cold Temp Problems.Diesel Generator Outside Air Supply Dampers Repaired (← links)
- 05000387/LER-1984-038, :on 840807,discovered Relays Which Control RHR Sys Shutdown Cooling Mode Isolation on High Area Differential Temp Not Tested Since 820127.New Procedures & Surveillance to Be Implemented (← links)
- 05000387/LER-1984-037, :on 840803,alternate Power Supply Electrical Protection Assembly Breakers Tripped on Undervoltage.Caused by Unanticipated Actuation of Three Esfs.Installation of Voltage Transformers Planned (← links)
- 05000387/LER-1984-036, :on 840724,short Circuit to Ground Developed, Tripping motor-generator Set & Resulting in Start of Standby Gas Treatment Sys.Caused by Grease Buildup in Motor of Reactor Protection Sys a motor-generator Set (← links)
- 05000387/LER-1984-035, :on 840718,turbine Control Valve Fast Closure Initiated by Low Condenser Vacuum Pressure Resulting in Reactor Trip.Caused by Actions Taken to Established Valve Lineup to Transfer Water Fuel Pool Tank (← links)
- 05000387/LER-1984-034, :on 840715,while Operating at 100% power,230-kV Transmission Line Experienced phase-to-phase Fault,Resulting in Generator Load Rejection & Turbine Trip.Caused by Line Sagging Into Tree (← links)
- 05000387/LER-1984-032, :on 840323,staff Determined That Surveillance Testing of Ionization Fire Detectors Not Performed within Time Allowed by Tech Specs.Caused by Inconsistency Between Unit 1 & 2 Tech Specs.Tests Performed (← links)
- 05000387/LER-1984-029, :on 840703,startup Transformer T-10 Isolated, Causing Trip in Unit 1 & Unit 2 Reactor Protection Sys A. Caused by Lightning Strike on 230-kV Transmission Line.W/ (← links)
- 05000387/LER-1984-031, :on 840703,HPCI Sys Declared Inoperable for 15 Minutes.Method Used to Seat Check Valve Not Adequate. Procedural Changes Being Evaluated (← links)
- 05000387/LER-1984-030, :on 840627,boron Concentration in Standby Liquid Control Tank Fell to 0.4% Below Tech Spec Limit.Cause Unknown.Tank Level & Concentration Returned to within Limits (← links)
- 05000387/LER-1984-039, :on 840906,temporary Monitoring Equipment Failed W/Permanent Turbine Bldg Special Particulate Iodine Noble Gas Monitor Out of Svc.Caused by Gravel Drawn Into Pump.Sample Pump Replaced & Returned to Svc (← links)
- 05000387/LER-1984-027, :on 840622,two Grab Samples Required by Tech Spec Action Statements Not Taken within Requisite Time Limits.Caused by Personnel Oversight.Supervisor Met W/ Technicians to Review Responsibilities (← links)
- 05000387/LER-1984-026, :on 840516,Tech Spec Review Revealed Current Plant Design of Core Spray Valve Full Flow Test Isolation Signal Not in Agreement W/Isolation Signal Specified by Tech Specs or FSAR (← links)
- 05000387/LER-1984-012-01, Revised LER 84-012-01:on 840225,due Date & Violation Date Inadvertently Omitted from Cover Sheet of Quarterly Surveillance Procedure SI-072-301.Administrative Procedures Revised (← links)
- 05000387/LER-1984-017-01, Updated LER 84-017-01:on 840310,during Performance of Weekly Preventive Maint Activity,Spray Pond Riser Networks A-1 & B-2 Found Frozen.W/Advent of Mild Weather,Networks Thawed & Pumped down.Long-term Fixes Investigated (← links)
- 05000387/LER-1984-025, :on 840430,two Main Turbine Weekly Surveillance Tests Not Performed within Time Limit Required by Tech Specs.Caused by Personnel Error.Surveillance Successfully Completed on 840501 (← links)
- 05000387/LER-1984-024, :on 840422,unit Operation Continued Beyond Time Limit Specified in Tech Spec 3.6.5.1 W/Reactor Bldg Ventilation Zone I cross-connected to Zones II & Iii. Procedural Changes Implemented (← links)
- 05000387/LER-1984-028, :on 840613,startup Transformer T-10 Isolated, Causing Reactor Protection Sys Trip.Caused by Lightning Strike on 230 Kv Transmission Line.Breaker Components & Entire Transformer Tested (← links)
- 05000387/LER-1984-001-01, Updated LER 84-001-01:on 840103,H2/O2 Analyzers in Containment Atmosphere Monitoring Sys Declared Inoperable Based on Vendor Info.Caused by Catalyst Inability to Withstand Iodine Concentrations (← links)
- 05000387/LER-1984-014, :on 840305,transformer T20 Tripped,Resulting in Isolation of Reactor Bldg Ventilation Zones II & Iii. Caused by Momentary Closure of Contact in High Speed Ground Switch (← links)
- 05000387/LER-1984-016, :on 840308,shiftly Channel Check of New Fuel Criticality Monitors Not Completed During Scheduled Time Period.Caused by Personnel Error.Personnel Counseled (← links)
- 05000387/LER-1984-015, :on 840121,background Radiation Surrounding Svc Water Radiation Monitor Reached Levels That Exceeded Tech Spec Limits.Cause Not Stated.Calibr Procedure Revised (← links)
- 05000387/LER-1984-012, :on 840229,discovered Functional Testing of Common Offgas Sys Hydrogen Analyzer Channel B Not Performed on 840225 as Required.Caused by Due Date Omitted from Surveillance Authorization (← links)
- 05000387/LER-1984-013, :on 840303,main Turbine Tripped on Spurious Trip of Turbine Thrust Bearing Wear Detector (TBWD) Pressure Switches.Caused by Spurious Malfunction of Blocking Relay in TBWD Circuitry.Relay Replaced (← links)
- 05000387/LER-1984-010, :on 840225,reactor Manually Scrammed When One of Six Automatic Depressurization Sys Safety Relief Valves Stuck Open & Would Not Close in 2 Minutes.Caused by Faulty Valve Solenoid.Solenoid Replaced (← links)
- 05000387/LER-1984-009, :on 840221,during Restart,Hpci Steam Supply Line Pressure Indicator Did Not Respond to Warm Up & Reactor Pressure Exceeded 150 Psig.Checkoff List & Operating Procedure Revised (← links)
- 05000387/LER-1983-162-03, /03L-0:on 831128,RHR B Svc Water Motor Operated Valve HV11210B Would Not Operate in Open Direction for Suppression Pool Cooling.Caused by Failure of Auxiliary Contact in Circuit Breaker Valves (← links)
- 05000387/LER-1983-112-03, /03L-0:on 830802,suppression Pool Temp Exceeded 105 F Twice During Testing.Caused by HPCI Surveillance Testing.Procedure Revised (← links)
- 05000387/LER-1983-108-03, /03L-0:on 830726,operations Personnel Received Drywell Floor Drain Sump High Level Alarm.Caused by Crossed Wires.Wires Restored to Proper Postions (← links)
- 05000387/LER-1983-105-03, /03L-0:on 830727,suppression Pool Temp Exceeded 90 F Twice.Caused by Normal,Gradual Transfer of Heat from Surrounding Structures to Pool During Normal Plant Operation.Events Reviewed W/Personnel (← links)
- 05000387/LER-1984-018, :on 840303,during Recirculation Pump Discharge Valve & Bypass Operability Test,Recirculation Discharge Valve 1F031B Failed to Operate.Caused by Valve Stem Binding W/Packing Glands (← links)
- 05000387/LER-1984-019, :on 840415,false High Drywell Pressure Signal Resulted from Removal of Two Primary Containment Isolation Logic Fuses.Caused by Incorrectly Installed Bypass Jumper. Fuses Reinstalled (← links)
- 05000387/LER-1983-069-03, /03L-0:on 830424,during Precommercial Operation Outage & Removal of Eccs,Leaking Relief Valve Discovered in Core Spray keep-fill Sys.Caused by Inadequate Pressure Control in Sys (← links)
- 05000387/LER-1984-022, :on 840331,purge Flow,Indicating Purge Mode of Operation Alarms Occurred at Same Time in Printout of Control Terminal.Caused by Sping Purge Command Not Being Entered at Local or Remote Control Consoles (← links)
- 05000387/LER-1984-023, :on 840404,sodium Pentaborate Concentration in Standby Liquid Sys Discovered Above Tech Spec Limit.Cause Not Listed.Demineralized Water Added & Tank Air Sparged for Approx 1 H (← links)
- 05000387/LER-1984-020, :on 840321,shutdown Cooling Suction Inboard & Outboard Isolation Valves Closed Due to Spurious Actuation of RHR Sys Differential Pressure Switches.Cause Not Stated. Shutdown Cooling Operation Will Be Observed (← links)
- 05000387/LER-1983-140-03, Valve Controlling Cooling Water Flow to HPCI Lube Oil Cooler & Barometric Condenser Would Not Cycle Electrically.Caused by Torque Switch Not Actuating Due to Conditions in Spring Pack (← links)
- 05000387/LER-1983-156-03, Acoustic Channel Monitoring Safety Relief Valves PSV-1F013B Tripped.Channel Failed on 831204.Caused by Spurious Responses from Monitor. Cable & Charge Converter Replaced (← links)
- 05000387/LER-1984-021, :on 840323,during Installation of Mod to Emergency Svc Water Sys,Fire Barrier Wrapping of Several Cable Raceways Overlooked.Fire Watch Established & Will Remain Until Fire Barrier Wrapping Complete (← links)
- 05000387/LER-1982-079-03, /03L-0:on 821222,during Recovery from Startup Program Test,Rcs Temp Exceeded 100 F/H Heatup Rate.Caused by Operator Error.Event Will Be Incorporated Into Operator Training & Requalification.Procedures Revised (← links)
- 05000387/LER-1982-080-03, /03L-0:on 821226,surveillance Per Tech Spec 4.2.2 Could Not Be Performed within Time Limits.Caused by Failure of Nuclear Steam Sys Processor Due to Interaction Between Transversing in-core Probe Switch Position & Processor (← links)
- 05000387/LER-1982-081-03, /03L-0:on 821226,while Decreasing Power During Startup Testing,Four Fuses Blew in Main Reactor Manual Control Sys,Causing Loss of Rod Position Display.Caused by Transient Current Surge.Fuses Replaced (← links)
- 05000387/LER-1982-078-03, /03L-0:on 821218,during Startup Testing Program, Two Jet Pumps Did Not Indicate Flowrate.Caused by Air Trapped in Lines.Air Bled Off & Indicators Returned to Normal.Source of Air Could Not Be Determined (← links)
- 05000387/LER-1983-001-01, /01T-0:on 830105,main Condenser Offgas Monitor Train Declared Inoperable Precipitating Entry Into Action Statement Requiring Grab Sample Be Taken Every 4 H.Sample Not Taken Due to Technician Error (← links)
- 05000387/LER-1984-017, :on 840310,spray Pond Riser Networks A-1 & B-2 Found Frozen.Cause Not Stated.Networks Thawed by Ambient Temp & Guidelines Developed for Spray Pond Operation to Avoid Riser Freezing (← links)
- 05000387/LER-1983-161-01, /01T-0:on 831209,during Refueling,Rcs Temp Allowed to Exceed 140 F.Shutdown Cooling Sys Operable & in Svc. Caused by Flawed Procedures.Reactor Coolant Temp Not Recorded While in Operational Condition 5 (← links)
- 05000387/LER-1983-163-03, /03L-0:on 831120,repeated Emergency Outside Air Intake High Radiation Alarms Occurred Contrary to Tech Specs.Caused by Failure of Gm Tube.Tube Replaced,Calibr, Retested & Channel Returned to Svc (← links)
- 05000387/LER-1983-159-03, /03L-0:on 831126,dual Indication Received When Valve SV-15736A Placed in Closed Position.Caused by Infrequent Valve Operation.Cycling Frequency Will Be Increased If Necessary (← links)
- 05000387/LER-1983-152-01, /01T-0:on 831201,engineering Found Analyzed Drawdown Time of Secondary Containment to Be Longer than 60 FSAR Limit.Cause Unknown.Substantial Testing & Possible Mods Being Pursued (← links)
- 05000387/LER-1983-158-03, /03L-0:on 831115,wick for Control Structure Ventilation Sys Chlorine Detector a Discovered Not Dripping Electrolyte Solution.Caused by Clogged Wick.Wick & Orifice Cleaned (← links)
- 05000387/LER-1983-157-03, /03L-0:on 831109 & 25,Zone III Ventilation Tripped Due to High Differential Pressure.Caused by Gusting Winds. Mods Being Implemented to Eliminate Problem.W/Undated Ltr (← links)
- 05000387/LER-1983-149-03, /03L-0:on 831102,emergency Svc Water Pump B Failed to Start Manually,Resulting in Unit Entering Limiting Conditions for Operation.Caused by Failure of Breaker for Essential Svc Water Pump B to Close (← links)
- 05000387/LER-1983-155-03, /03L-0:on 831106,while Changing RHR Loop B Lineup from Suppression Pool Cooling to Normal LPCI Injection,Check Valve in RHR Pump B Discharge Line Would Not Seat Properly. Caused by Misalignment of Valve Disc (← links)
- 05000387/LER-1983-147-03, /03L-0:on 831025,pressure for Control Rod Scram Accumulator 46-07 Fell Below Min Pressure of 940 Psig.Caused by Low Pressure Condition During Draining Activity to Correct Cause of Accumulator Trouble Alarm (← links)
- 05000387/LER-1983-150-03, /03L-0:on 831022,while at 100% Power,Reactor Bldg Heating & Ventilation (H&V) Heaters 1E252A,B,C & D Failed to Energize.Manual Initiation Unsuccessful.Zone 1 H&V Sys Shut Down.Caused by Disengaged Pneumatic Line (← links)
- 05000387/LER-1983-151-03, /03L-0:on 831022,operator Found Zone I Differential Pressure Less than Tech Spec Requirements for Secondary Containment Integrity.Caused by Mechanical Drag in Exhaust Fan Outlet Damper Mechanism (← links)
- 05000387/LER-1983-139-01, Alternate Power Supply Breaker Removed & Bus 1A203 Did Not Have Two Independent Offsite Sources of Power.Caused by Personnel Error.Proper Interpretation of Tech Specs Provided (← links)
- 05000387/LER-1983-144-01, /01T-0:on 831105,while Operating at Less than 2% Power,Failure to Locate Partially Obscured Deuterium Analyzer Return Valves Made Analyzer Channels Inoperable. Caused by Location of Analyzer Return Valves (← links)
- 05000387/LER-1983-148-03, /03L-0:on 831014,during steady-state Operation at 100% Power,Electricians Working in Spotmos Cabinet 1C690B Accidentally Placed On/Off Button Supplying Power in Off Position.Caused by Personnel Error (← links)
- 05000387/LER-1983-145-03, /03L-0:on 831010 & 31,reactor Bldg Zone III HVAC Sys Tripped,Resulting in Limiting Condition for Operation. Caused by Actuation of Differential Pressure Switch PDSHH17501A or B Due to Wind Turbulence (← links)
- 05000387/LER-1983-146-03, /03L-0:on 831013,during Review of Surveillance Operating Procedures,Discovered Monthly Verification of Drywell Head Seal Test Connection Valve Not Performed.Caused by Personnel Error.Procedure Scheduled (← links)
- 05000387/LER-1983-143-03, /03L-0:on 830929,following Replacement of Common Inlet Filter for Reactor Bldg Zone III Refueling Floor Supply Fans,Fans Tripped After Starting.Caused by Low Flow Signals Due to Failure to Adjust Inlet Damper (← links)
- 05000387/LER-1983-142-03, /03L-0:on 830929,jumper Caused Short Circuit in Relay Logic Board Resulting in Loss of Radiation Monitor & Ventilation Sys Isolation.Caused by Alligator Clips Falling Off Jumper.Logic Board Repaired (← links)
- 05000387/LER-1983-125-03, /03L-0:on 830903,average Drywell Air Temp Exceeded Tech Specs by 1 Degree.Cause Not Stated.Plant Startup & Heatup Procedures Revised (← links)
- 05000387/LER-1983-136-03, /03L-0:on 830918,24 & 27,reactor Bldg Zone I Ventilation Sys Tripped,Resulting in Differential Pressure of Less That Required 0.25-inches Vacuum.Caused by Actuated Differential Pressure Switch (← links)
- 05000387/LER-1983-138-03, /03L-0:on 830923,during Semiannual Functional Check of Fire Protection Ionization Detectors,Traversing in-core Probe Ball Valves Prevented from Performing Containment Isolation Function (← links)
- 05000387/LER-1983-135-03, /03L-0:on 830915,wick for Chlorine Detector a in Control Structure Ventilation Sys Not Dripping Electrolyte Fluid as Required.Wick Became Clogged.Electrolyte Drip Restored After Wick Cleaned (← links)
- 05000387/LER-1983-137-03, /03L-0:on 830914,hydrogen Channel of Containment Hydrogen/Oxygen Analyzer a Failed Low.Caused by Hydrogen Reagent Gas Solenoid Valve Not Closing Completely When Solenoid Deenergized.Valve Cycled & Seated (← links)
- 05000387/LER-1983-116-03, RHR Pump a Suction Valve Closed While Trying to Seat Check Valve in RHR Pump a Discharge Line.Failure of Check Valve to Seat Caused by Misaligned Valve Disc & Bent Hinge Pin (← links)
- 05000387/LER-1983-133-03, /03L-0:on 830921,while on Daily Rounds,Operations Personnel Identified Damaged Seals on Reactor Turbine Bldg Airlock Doors.Seal Apparently Damaged When Equipment Taken Into Reactor Bldg.Seals Replaced (← links)
- 05000387/LER-1984-008, :on 840209,during Outage RHR Seal Water Coolers Discovered Improperly Designed.Coolers Replaced.Teledyne Engineering Svc Conducting Independent Review (← links)
- 05000387/LER-1984-007, :on 840202,shear Valve Explosive Cartridge Unexpectedly Fired During Surveillance Testing,Shearing Transversing in-core Probe Detector Cable.Cause Unknown.New Detector & Cable Installed.Procedure Changed (← links)
- 05000387/LER-1983-078-03, /03L-0:on 830829,excess Flow Check Valve XV-B21-F009 Could Not Be Tested to Verify Operability.Caused by Present Configuration of Instrument Line Not Allowing Access to Valve W/O Removing Vessel Head (← links)
- 05000387/LER-1983-124-03, /03L-0:on 830901,solenoid Valve Controlling Reactor Bldg Zone I Exhaust Fan Damper Failed.Caused by Matl Wear in Solenoid Valve.Valve Rebuilt & Reinstalled (← links)
- 05000387/LER-1984-005, :on 840127,svc Water Grab Sample Not Taken During Day Shift.Caused by Sample Being Missed During Turnover Between Day & Afternoon Shifts.Procedural Change Issued (← links)
- 05000387/LER-1984-006, :on 840125,discovered That Performance of Weekly Source & Intermediate Range Monitors W/Unit in Mode 5 Constitutes Core Alteration.Core Alterations Prohibited Per Tech Specs.Tech Spec Change in Progress (← links)
- 05000387/LER-1984-004, :on 840113,two Level Switches on Condensate Storage Tank Found Inoperable Due to Freezing.Caused by Deenergized Heat Tracing.Heat Tracing on Affected Instrument Lines & Switches Restored (← links)
- 05000387/LER-1983-114-03, /03L-0:on 830809,at 100% Power,After Preventive Maint,Standby Gas Treatment Sys Train a Started & Fan Tripped on Low Heater Differential Temp.Caused by Maint Directions Supplying Air Flow Signal W/O Flow (← links)
- 05000387/LER-1983-110-03, /03L-0:on 830818,wick for Chlorine Detector a (XISH-07802A) in Control Structure Ventilation Sys Discovered Not Dripping Electrolyte Fluid as Required.Caused by Clogged Wick.New O-rings Will Be Installed (← links)
- 05000387/LER-1983-172-03, /03L-0:on 831230,reactor Protection Sys B Motor Generator Set Electrical Protection Assembly (EPA) Breakers Tripped,Resulting in Loss of Shutdown Cooling.Cause Under Investigation.Circulation Reestablished (← links)
- 05000387/LER-1984-001, :on 840103,hydrogen Dioxide Analyzers in Containment Atmosphere Monitoring Sys Inoperable.Caused by Design Deficiency.Catalyst Will Be Replaced on 840201 for Unit 1 & on 840215 for Unit 2 (← links)
- 05000387/LER-1983-088-03, RCIC Pump Discharge Valve Failed to Open.Caused by Gaps Between Breaker Male & Female Stab Clips.Investigations Revealed Lack of Clearance in GE 7700 Control Ctrs.Procedures Revised (← links)
- 05000387/LER-1983-109-03, RCIC Barometric Condenser Condensate Vacuum Pump Tripped During Spray Pond Testing.Caused by Mechanical Failure of Pump Motor Commutator.Condensate Motor Replaced (← links)
- 05000387/LER-1983-043-01, Reactor Mode Switch Turned to Shutdown Position Actuated Half Scram.Caused by Two Reactor Mode Switch Contact Failures.Switch Replaced. Procedures Revised.W/Undated Forwarding Ltr (← links)
- 05000387/LER-1983-054-03, /03L-0:on 830401,one Hydraulic Control Unit Found W/Pressure Below Allowable Limit.Caused by Leaking Connections.Procedural Changes Instituted to Recharge Any Accumulator W/Low Pressure,But Above Alarm Point (← links)
- 05000387/LER-1983-052-03, /03L-0:on 830325,during Surveillance Test,Creoass Train a Tripped.Caused by Fan Belts Coming Off Fan Pulley. Belts Replaced & Bearings & Fan Pulley Realigned (← links)
- 05000387/LER-1983-167-03, /03L-0:on 831208,while Performing 4 Kv Bus Undervoltage Channel Calibr,Loss of Voltage Relays Associated W/Engineered Safeguard Sys Buses a & C Had Trip Setpoints of 17 Volts.Settings Adjusted (← links)
- 05000387/LER-1983-170-03, /03L-0:on 831213,charcoal Filters in Train a of Control Room Emergency Outside Air Supply Sys Did Not Satisfy Test Specs During Freon Leak Test.Caused by Insufficient Charcoal in Charcoal Filter (← links)
- 05000387/LER-1983-010-01, /01P-0:on 830209,runout Flow on Feedwater Pumps Found in Excess of 135% Assumption in Feedwater Controller Failure/Max Demand Transient Analysis.Feedwater Motor Speed Changer Reduced to Limit Flow.Stops Will Be Adjusted (← links)
- 05000387/LER-1983-171-03, /03L-0:on 831217,both Reactor Water Cleanup Sys High Dp Channel Calibr Switches Had as-found Trip Settings Greater than Tech Spec Requirements.One Switch out-of-calibr Due to Bellows Failure.Other Switch Recalibr (← links)
- 05000387/LER-1983-169-03, /03L-0:on 831213,shutdown Cooling Suction Inboard & Outboard Isolation Valves Closed Following Loss of Power to Primary Containment Isolation Sys (Pcis).Caused by Unintentional Actuation of PCIS (← links)
- 05000387/LER-1983-004-03, /03L-0:on 830103,during Startup Testing,Diesel Generator C Failed to Start.Caused by Overvoltage Trip Due to Incorrect Setting for Voltage Regulator & Relay Picking Up Lower than Expected.Procedures Revised (← links)
- 05000387/LER-1983-007-03, /03L-0:on 830110,during Startup Testing,Average Power Range Monitor Scram & Rod Block Setpoints Not in Tolerance.Caused by Inherent Qualities of Xenon Free Startup Causing Excessive Power Peaking.Setpoints Adjusted (← links)
- 05000387/LER-1982-054-03, /03L-0:on 821115,due to Drywell Chiller Tripping, Drywell Temp Exceeded 135 F.Caused by Strainer Blockage. Strainer Removed & Design Change to Replace Present Strainer Initiated (← links)
- 05000387/LER-1982-055-03, /03L-0:on 821114,during Startup Testings,Rod Worth Minimizer Declared Inoperable & Removed from Svc After Locking Up Several Times During Rod Movement.Caused by Defective Reed Switch.Indication Mechanism Replaced (← links)
- 05000387/LER-1983-126-03, /03L-0:on 830905,following Receipt of Fault Alarm, Control Rod Scram Accumulator 46-07 Pressure Found Below Tech Spec Limit.Caused by Water Leak Past Piston.Accumulator Repressurized (← links)
- 05000387/LER-1983-121-03, /03L-0:on 830902,average Power Range Monitor Flow Biased Simulated Thermal Power - Upscale Scram & Neutron Flux - Upscale Control Rod Block Trip Setpoints Higher than Tech Spec Limit.Caused by Power Peaking (← links)
- 05000387/LER-1983-128-03, /03L-0:on 830913,reactor Bldg Zone III Ventilation Sys Tripped & Automatically Restarted.Caused by Spurious Actuation of Differential Pdshh 17501B Switch.Pneumatic Instruments Replaced (← links)
- 05000387/LER-1983-123-03, /03L-0:on 830901,reactor Bldg Zone III Ventilation Tripped,Causing short-duration Loss of 0.25 Inches.Caused by Momentary,Spurious Signal.Investigation Revealed Absence of Zone III Isolation Signal (← links)
- 05000387/LER-1983-127-03, /03L-0:on 830909,during Surveillance of Standby Liquid Control Sys,Available Weight of Sodium Pentaborate (5,250 Lbs) Discovered Below Limit of 5,500 Lbs.Caused by Sys Configuration at Odds W/Procedure (← links)
- 05000387/LER-1983-132-03, /03L-0:on 830910,during Weekly Preventive Maint Activity,Analyzer B Exhibited Erratic Oxygen Concentration Readings & Declared Inoperable.Caused by Malfunctioning Hydrogen Sample Cell Flow Regulator (← links)
- 05000387/LER-1983-122-03, /03L-0:on 830901,reactor Bldg Zone III Ventilation Sys Isolated & Would Not Restart After Radiation Detector Power Supply Switched to Alternate Source.Caused by Blown Fuse on Zone III Isolation Damper HD17502A (← links)
- 05000387/LER-1983-117-03, /03L-0:on 830815 & 0902,reactor Bldg Zone 1 HVAC Supply Fans Tripped,Causing Zone 1 Pressure to Exceed Tech Specs.Caused by Opening Reactor Bldg Zone 1 Supply Plenum Access Door for Approx 30 or Longer (← links)
- 05000387/LER-1983-118-03, /03L-0:on 830829,during Calibr of Main Steam Line A,Low Pressure Switch PSL-B21-1N015A Setpoint Found Below Tech Spec Allowable Value.Setpoint Failed Acceptance Criteria.Switch Replaced (← links)
- 05000387/LER-1983-119-03, /03L-0:on 830828,during Drywell Vacuum 2 H post- Initiation Surveillance,Anomalous Position Indication Noted for Two Vacuum Breakers.Caused by Loose Cam Coupling Set Screws.Solenoid Valve Cleaned.Screws Tightened (← links)
- 05000387/LER-1983-113-03, /03L-0:on 830802,during Preparation & Review of Surveillance Procedures,Monthly & 18-month Surveillances for 4 Kv Undervoltage Relays Performed W/O Declaring Emergency Diesel Generator Inoperable (← links)
- 05000387/LER-1983-111-03, /03L-0:on 830805,valve Controlling Cooling Water Flow to HPCI Lube Oil Cooler & Barometric Condenser Would Not Cycle Electrically.Caused by Motor Insulation Breakdown. Motor Replaced (← links)
- 05000387/LER-1983-106-03, /03L-0:on 830802,during Quarterly Surveillance for HPCI Flow Verification,Pump Did Not Reach Required Speed & Discharge Pressure for Gpm Flow.Caused by Gain on Ramp Generator Signal Converter Drifting Low (← links)
- 05000387/LER-1983-107-01, /01T-0:on 830818,spray Pond Riser Network a Inlet Manual Isolation Valve Would Travel Only in Closed Direction.Caused by Valve Operator Open Stopnut Moving Out of Position.Mechanical Stop Casing Loosened (← links)
- 05000387/LER-1983-101-03, /03L-0:on 830708,both RCS Leak Detection Sys Gaseous Monitoring Channels Considered Out of Svc.Caused by Dirty Contacts on Gaseous Radiation Detector Plug Connector in RCS Channel A.Contacts Cleaned (← links)
- 05000387/LER-1983-099-03, /03L-0:on 830629,RCIC Turbine Exhaust Valve Failed Local Leak Rate Testing.Caused by Tolerances Between Hard & Resilient Seats W/O Good Seating Surface.Resilient Seat Replaced (← links)
- 05000387/LER-1983-102-03, /03L-0:on 830708,RCIC Turbine Exhaust Pressure Channel a Tripped But Could Not Be Reset.Caused by Unadjusted Channel a Microswitch.Microswitch Adjusted (← links)
- 05000387/LER-1983-092-03, /03L-0:on 830624,one Offsite Power Supply Lost When Transformer Failed.Cause Unknown.Final Determinations to Be Made Following Investigation of Transformer Internals by Vendor.Transformer Replaced (← links)
- 05000387/LER-1983-097-03, /03L-0:on 830624,reactor Recirculation Sys Shutdown,Reactor Water Cleanup Sys Isolated & Cooldown Rate of Idle Loops Exceeded Tech Specs.Engineering Evaluation of Monitoring Techniques Requested (← links)
- 05000387/LER-1983-095-03, /03L-0:on 830624,during Performance of Monthly Channel Functional Test of HPCI Turbine Exhaust Diaphragm, Pressure Channel Isolation Signal Received.Meter Incorrectly Installed Across Terminals (← links)
- 05000387/LER-1983-093-01, /01T-0:on 830711,during Review of Completion of Surveillance Tests,Discovered That 31-day Functional Test of Containment Radiation Monitor a Not Performed from 830612-0711.Caused by Personnel Error (← links)
- 05000387/LER-1983-091-03, /03L-0:on 830609,LPCI Loop B of RHR Discovered Not Full.Lpci Declared Inoperable.Caused by Loose LPCI Control Disc Valve.Tack Weld on Disc/Stem Assembly Increased (← links)
- 05000387/LER-1983-094-03, /03L-0:on 830617,during Cold Startup,Average Power Range Monitor Flow Biased Scram Trip Setpoint Less Conservative than Tech Specs.Caused by Low Concentration of Xenon in Core.Setpoint Adjusted (← links)
- 05000387/LER-1983-104-03, /03L-0:on 830717,emergency Outside Air Intake High Radiation Alarm Received in Main Control Room.Caused by One Channel Detector Drifted High Due to Failure of Gm Tube. Gm Tube Replaced,Calibr & Retested (← links)
- 05000387/LER-1983-068-03, /03L-0:on 830419,during Surveillance Testing to Demonstrate Diesel Generator Operability Following Maint, Diesel Generator a Failed to Start within Required 10 S. Caused by Lines Drained During Maint (← links)
- 05000387/LER-1983-036-03, Fuse Supplying Topaz Inverter Blew Several Times,Affecting Operation of RCIC Instrumentation & Speed Control Circuitry at Remote Shutdown Panel.Cause Unknown.Recorders Installed (← links)
- 05000387/LER-1983-103-03, /03L-0:on 830707,RCIC Turbine Tripped.On 830705, Turbine Tripped When Sys Initiated on Low Reactor Water Level Following Scram.Caused by Restriction in Clearances Between Valve & Guide Sleeve (← links)
- 05000387/LER-1983-062-03, /03L-0:on 830414,local Leak Rate Test on Main Steam Line a Discovered Leakage in Excess of Tech Specs. Cause Not Stated.Inboard MSIV Reworked.Normal Lapping Performed on Valve Disc & Seat (← links)
- 05000387/LER-1983-064-03, /03L-0:on 830414,local Leak Rate Test for Main Steam Line C Exceeded Tech Spec Value.Cause Not Stated. Inboard MSIV Reworked & Valve Retested (← links)
- 05000387/LER-1983-067-01, /01P-0:half Scram Received & MSIV B Status Light Went Out After Reactor Mode Switch Moved to Startup Position.Neither Switch Would Reset.Addl Info Re Cause & Corrective Action Forthcoming (← links)
- 05000387/LER-1983-060-03, /03L-0:on 830411,reactor Protection Sys Actuation Caused Div II of RHR to Isolate While in Shutdown Cooling Mode.Caused by Const Worker Bumping Breaker Handle for 4kV Safeguard LC X-fmr.Cause Unknown.Ler Will Be Updated (← links)
- 05000387/LER-1983-058-03, /03L-0:on 830409,during Scheduled Surveillance Tests,Two Reactor Pressure Vessel Water Level Switches Found Out of Tolerance.Caused by Setpoint Drift.Engineering Evaluation Re Use of Analog Transmitters Underway (← links)
- 05000387/LER-1982-001-01, Linear Indications Found on Recirculation Riser Weld A-11M.Caused by Slag Inclusion in A-11M Weld & Partial Cold Lap on 1/4 Inch A-13 Weld.Weld Areas Excavated & Repaired (← links)
- 05000387/LER-1983-055-03, /03L-0:on 830405,while Calibr Safety Relief Valve Acoustic Monitoring Sys,One Monitor Did Not Indicate That Respective Valve Open.Faulty Indication Caused by Broken Pin on Accelerometer Connector.Connector Replaced (← links)
- 05000387/LER-1983-019-03, /03L-0:on 830119,drywell Vacuum Breaker Considered Inoperable Based on Indication of Being Partially Open. Caused by Limit Switch Failure.Corrective Actions Under Investigation (← links)
- 05000387/LER-1983-050-03, /03L-0:on 830318,boron Concentration in Standby Liquid Control Tank Found to Be 0.1% Greater than Tech Specs.Caused by Water Lost Through Evaporation Due to High Ambient Temp in Tank Area (← links)
- 05000387/LER-1983-049-03, /03L-0:on 830319,diesel Generator B Emergency Svc Water Pump Did Not auto-start as Diesel Was Started.Caused by Agastat Relay Sticking & Not Stroking Far Enough to Seal Contacts.Relays Replaced (← links)
- 05000387/LER-1983-048-03, /03L-0:on 830315,operator Found Bottle Valve for Reagent Gas for Containment Hydrogen Analyzer B Closed. Probably Caused by Unidentified Person Shutting Valve. Operators Round Sheets Revised (← links)
- 05000387/LER-1983-044-03, /03L-0:on 830311,HPCI Sys Inadvertently Isolated While in Startup Condition W/Steam Dome Pressure Greater than 150 Psig.Caused by Connecting Functional Test Equipment to Adjacent HPCI Temp Isolation Switch (← links)
- 05000387/LER-1983-045-03, /03L-0:on 830310,six Instruments Omitted from 12-h Channel Checks.Caused by Inadequate Tech Spec Review. Instruments Added to Shift Surveillance Log (← links)
- 05000387/LER-1983-033-01, /01T-0:on 830310,two Blank Flanges Found Missing on HVAC Ductwork Establishing Flow Path from Unit 2 to Unit 1.Caused by Removal of Untagged Flanges During Separation Program.Flanges Reinstalled & Tags Hung (← links)
- 05000387/LER-1983-038-03, /03L-0:on 830304,Zone 3 Reactor Bldg Normal Ventilation Fans Tripped During Performance of Isolation Sys Surveillance Test.Possibly Caused by Difficulty of Startup Procedure for Sys.Operating Procedure Revised (← links)
- 05000387/LER-1983-041-03, /03L-0:on 830222,during Investigation of Standby Gas Treatment Sys,Three Div 1 Radiation Monitors Isolation/ Actuation Function Disabled.Caused by Poor Work Practice During Electrical Separation Work (← links)
- 05000387/LER-1983-039-03, /03L-0:on 830225,during Review of Tech Spec, Channel Functional Tests for Rod Block Monitor & Recirculation Flow Units Omitted Prior to Startup.Caused by Procedures Not Being Placed in Tech Spec.Tech Spec Revised (← links)
- 05000387/LER-1983-035-03, /03L-0:on 830228,4 H Surveillance of RCS Unidentified Leakage Not Performed Due to Inoperability of One of Two Drywell Floor Drain Sump Level Monitoring Devices at One of Two Sys Channels.Pump a Used to Pump Sump (← links)
- 05000387/LER-1983-037-03, /03L-0:on 830219,during Investigation of RCIC Initiating Devices,Reactor Vessel Level Switches LIS-B21- N031D Found W/Two Switches Below Tech Spec Limit.Caused by Setpoint Drift.Calibr Schedule Changed to 3 Months (← links)
- 05000387/LER-1983-031-03, /03L-0:on 830228,diesel Generator B Failed to Start During Monthly Surveillance.Caused by Failed subcomponent,ST-03497B/1,in Speed Sensing Circuit.Device Replaced & Recalibr (← links)
- 05000387/LER-1983-089-03, /03L-0:on 830606,during Surveillance Testing, Train B of Standby Gas Treatment Sys Tripped Shortly After Starting.Caused by Controls for Outside Air Makeup Damper in Closed Instead of Open Position (← links)
- 05000387/LER-1983-090-03, /03L-0:on 830606,containment Atmosphere Hydrogen Dioxide Analyzer Placed in Svc from Standby Condition & Exhibited Erroneous Readings.Analyzers Declared Inoperable. Caused by Calibr Gas in Lines.Lines Purged (← links)
- 05000387/LER-1983-034-03, /03L-0:on 830218,during Shutdown,Operator Discovered LPCI B Injection Throttle valve,F017B,vibrating Severely.Caused by Operating RHR B Shutdown Cooling W/Sys Flow Rates Outside Optimum Throttling Range (← links)
- 05000387/LER-1983-030-03, /03L-0:on 830216,RHR Shutdown Cooling Lost Due to Div 1 Isolation Signal to Inboard Isolation Valve on Pump Suction.Caused by Spurious Tripping of Alternate Power Supply Breaker (← links)
- 05000387/LER-1983-075-01, /01P-0:on 830515,interactions of Chlorine Detector in Control Room Emergency Outside Air Supply Sys Noted Following Loss of Power.Procedure Changes Instituted to Provide Operators W/Appropriate Corrective Actions (← links)
- 05000387/LER-1983-083-03, /03L-0:on 830520,during Review of Draft Procedures,Alarm Check Required by Tech Spec Not Included in Chemistry Surveillance Procedures.Change Made to Surveillance Procedures to Include Alarm Check (← links)
- 05000387/LER-1983-081-03, /03L-0:on 830511,in Operational Condition 4, Shutdown Cooling Not Promptly Returned to Svc Following ASME Class 1 Boundary Leak Test.Caused by Amount of Time Required to Fill Vent Sys Following Leak Test (← links)
- 05000387/LER-1983-082-01, /01P-0:on 830607,main Turbine Trip Function (High Reactor Vessel Level) Bypassed for post-mod Testing on Turbine Control Valves.Trip Function Not Returned to Svc Prior to Operational Condition 1 (← links)
- 05000387/LER-1983-021-01, /01T-0:on 830224,plant Entered Operational Condition 2 Before Discovery That Containment Purge & Vent Valves Not Locked Closed.Drywell Closeout Procedure & Plant Startup Procedures Revised (← links)
- 05000387/LER-1983-077-03, /03L-0:on 830510,seven Snubbers W/Inadequate Clearance Identified,Indicating Possible Rear Bracket Interference.Caused by Lack of Info from Snubber Vendor. Snubbers Reworked (← links)
- 05000387/LER-1983-027-03, /03L-0:on 830219,technician Discovered That PSH-B21-N056 B & C (Low Condenser Vacuum Pressure switches-channel B & C) Did Not Meet Tech Spec.Caused by Setpoint Drift.Switches Recalibr (← links)
- 05000387/LER-1983-080-03, /03L-0:on 830513,setpoint for PDIS-E-11-INO19B (Shutdown Cooling High Flow) Found Out of Tolerance.Caused by Setpoint Drift.Switch Recalibr & Returned to Svc (← links)
- 05000387/LER-1983-028-03, /03L-0:on 830213,one of Two Offsite Power Feeds to Onsite Class IE Distribution Sys de-energized.Caused by Transformer Differential Relay Scheme Opening Power Supply Breakers Due to Failure of a Phase Winding to Ground (← links)
- 05000387/LER-1983-032-03, /03L-0:on 830213,drywell Average Air Temps Exceeded Tech Spec During Startup Test Following 100% Load Reject Test.Caused by Loss of Svc Water Due to Failure to Achieve Auxiliary Electrical Bus Fast Transfer (← links)
- 05000387/LER-1983-029-03, /03L-0:on 830215,quarterly Calibr Surveillance SI-83-321 on High Drywell Pressure Channel D,PSH-E11-N010D, Failed at Meet Tech Spec Value.Caused by Setpoint Drift. Instrument Will Be Checked During Next Quarterly Calibr (← links)
- 05000387/LER-1983-079-03, /03L-0:on 830515,inboard & Outboard Dilution Flow Transmitters Found Valved Out.Caused by Personnel Error. Event Rept Given to Personnel & Will Be Discussed at Next Meeting (← links)
- 05000387/LER-1983-017-03, /03L-0:on 830126,rod Worth Minimizer Generated Spurious Blocks Indicating out-of-sequence Control Rod 46-23.Caused by Intermittent Fault in Rod Position Probe Sent to Rod Scan by Rod Position Indication Sys (← links)
- 05000387/LER-1983-016-03, /03L-0:on 830125,during Startup Test,Two Instances of Excessive Feedwater & Reactor Water Conductivity & Ph Experienced.Caused by Water Containing Organic Substance Entering Chamber.Procedures Being Developed (← links)
- 05000387/LER-1982-057-03, /03L-0:on 821120,during Startup Testing Program, RCIC Declared Inoperable After Ramp Generator Failed.Cause Undetermined.Generator Board Inspected,Cleaned & Functionally Checked.No Problems Identified (← links)
- 05000387/LER-1983-020-03, /03L-0:on 830129 & 0203,during Startup Testing, Control Structure Chlorine Detector a Constant Drip Feature Failed.Caused by Clogging of Orifice Due to Crystallization on Detector Wick & Orifice.Wick & Orifice Cleaned (← links)
- 05000387/LER-1983-018-03, /03L-0:on 830126,during Startup Test Program, Found Inaccurate Value for 100% Rated Recirculation Flow Utilized to Establish Average Power Range Monitor flow-biased Rod Block & Scram Setpoints.Points Reset (← links)
- 05000387/LER-1983-015-03, /03L-0:on 830121,control Rod 34-51 Could Not Be Withdrawn During Normal Startup.Cause Not Stated.Control Rod Freed Using Higher Drive Water Pressures (← links)
- 05000387/LER-1983-014-03, /03L-0:on 830119,during Startup Test Program, Recirculation Pump a Motor Generator Set Tripped.Caused by Overload in Dc Relay Heater in Exciter Field Circuit. Investigation Will Be Performed After Data Collected (← links)
- 05000387/LER-1983-006-03, /03L-0:on 830108,RCS Conductivity Exceeded 2.0 Micromhos/Cm While in Operational Condition 2.Caused by Inadvertent Isolation of Reactor Water Cleanup Sys Due to Faulty Relay Module in Control Circuitry.Module Replaced (← links)
- 05000387/LER-1983-008-03, /03L-0:on 830107,during Startup Test Program,Both Control Structure Chlorine Detectors Declared Inoperable Due to Failure of Constant Drip Feature.Caused by Contaminated Wick.Wick Replaced (← links)
- 05000387/LER-1983-003-03, /03L-0:on 830101,required Vacuum of HVAC Zone III Not Maintained.Caused by Pressure Fluctuations at Exterior Delta Pressure Sensor Due to Excessive High Winds.Vacuum Setpoint Raised to Decrease Sensitivity (← links)
- 05000387/LER-1982-074-03, /03L-0:on 821216,during Startup Testing Program, Standby Liquid Control Tank Found Out of Spec.Sodium Pentaborate Added to Bring Concentration within Specs. Procedures Will Be Modified to Keep Tank at Higher Level (← links)
- 05000387/LER-1982-076-03, /03L-0:on 821217,recirculation Pump B Tripped During Startup Test.Caused by Technician Placing Instrument Leads on Wrong Terminals While Attempting to Obtain Test Data.Procedure to Obtain Test Data Revised (← links)
- 05000387/LER-1982-077-03, /03L-0:on 821217,one HPCI Steam Line Sensor Setpoint Found Out of Allowable Value Range.Caused by Instrument Drift.Revised Setpoints for Instrument Determined & Surveillance Procedure Changed (← links)
- 05000387/LER-1982-073-03, /03L-0:on 821213,drip Leg of Control Structure Chlorine Detector B Nonfunctional.Caused by Continuous Operation of Heat Tracing on Sample Line Drying Out Drip Leg.Mod to Move Sensor to Sample Line Initiated (← links)
- 05000387/LER-1982-075-03, /03L-0:on 821215,diesel Generator C Tripped During Testing.Caused by Loose Jacket Water Cooler High Temp Switch.Temp Element Recalibr (← links)
- 05000387/LER-1982-056-03, /03L-0:on 821120,drywell Vacuum Relief Breaker Valves Were Inoperable Based on Incorrect Position Indication.Caused by Loose Collar on Valve Shaft & Failed Indication Bulb.Setscrew & Bulb Replaced (← links)
- 05000387/LER-1982-052-03, /03L-0:on 821107,during Startup Testing,Pressure Instrumentation Indicated Zone 1 of Secondary Containment Not Maintained at Required Vacuum.Caused by High Wind Condition.Zone III Sensor Separated & Moved (← links)
- 05000387/LER-1982-051-03, /03L-0:on 821107,during Startup Testing of RCIC Sys,Controller Functioning But Could Not Be Transferred to Automatic Mode.Caused by Controller Not Being Tuned at Rated Conditions.Controller Calibr & Testing Completed (← links)
- 05000387/LER-1982-050-03, /03L-0:on 821105,diesel Generator D Failed to Run During Performance of Surveillance Test.Caused by Frequency Sensitive Relay.Voltage Regulator Prepositioned Until Nonfrequency Sensitive Relay Installed (← links)
- 05000387/LER-1982-049-03, /03L-0:on 821103,HPCI Sys Inoperable When Input Voltage to Static Inverter Exceeded Setpoint & Tripped Off Inverter During Startup Test Program.Caused by Exceeding Trip Setpoint.Inverter Reworked & Setpoint Raised (← links)
- 05000387/LER-1982-048-03, /03L-0:on 821101,control Rod Position Indication full-out Position Switch Inoperable for One Rod.Caused by Failed Subcomponent on Printed Circuit Board.Board Replaced (← links)
- 05000387/LER-1982-043-01, /01T-0:on 821116,engineering Review Revealed Failure of Single Component Could Defeat Overload Detection & Protection Devices for Containment Penetration Carrying Power Cables for Reactor Recirculation Pumps (← links)
- 05000387/LER-1982-042-01, /01T-0:on 821116,review of Response to Internal Incident Rept Revealed That Grab Samples Not Taken at Required Frequency While RHR Svc Water Sys Monitor Out of Svc.Caused by Personnel Error (← links)
- 05000387/LER-1982-046-03, /03L-0:on 821031,QA Reviewer Determined Five safety-related Snubbers Installed Had Not Been Determined Operable by Performing Necessary Surveillance.Caused by Oversights in Turnover Process.List of Snubbers Verified (← links)
- 05000387/LER-1982-037-01, /01P-0:confirms 821101 Telcon Re Exceeding Number of Allowable Cycles Reactor Recirculation Pump Discharge Valves Permitted,Per SER Suppl 3.License Amend Will Be Requested to Allow 25 Cycles (← links)
- 05000387/LER-1982-036-01, /01P-0:on 821101,HPCI Isolation High Steam Line Delta Pressure Detection Instrument Settings Found Above Allowable Value Preventing Isolation Valves from Functioning.Cause Not Stated (← links)
- 05000387/LER-1982-023-03, /03L-0:on 820915,during Startup Testing of Steam Relief Valve Acoustic Monitoring Sys,Three Monitors Failed to Operate Correctly.Event Was Initial Calibr of Monitors Using Steam.Monitors Adjusted,Tested & Placed in Svc (← links)
- 05000387/LER-1982-022-03, /03L-0:on 820916,while Cleaning Control Rod Drive (CRD) Suction Strainers,Crd Pumps Tripped.Caused by Low Suction Pressure Due to Pressure Fluctuations from Cycling Condensate Reject Valve.Suction Trip Logic Modified (← links)
- 05000387/LER-1983-040-03, /03L-0:on 830301,during Startup Test Program, Control Structure a Chlorine Detector Declared Inoperable Due to Failure of Constant Trip Feature.Caused by Excessive Drip Rate in Electrolyte.Heat Tracing Sensor Relocated (← links)
- 05000387/LER-1983-026-01, /01T-0:on 830301,while Operating at 100% Power, Operator Tagged Out Standby Gas Treatment Sys A,Causing Both Trains to Be Inoperable.Caused by Personnel Error. Reinstruction & Training Being Formulated (← links)
- 05000387/LER-1983-024-03, /03L-0:on 830205,during Startup Testing at 93% Power,Contacts in Reactor Vessel Level Switch LIS-B21-IN042A Would Not Close at Setpoint.Caused by Mechanical Failure Inside Mechanism.Switch Replaced (← links)
- 05000387/LER-1983-023-03, /03L-0:on 830202,ventilation to Reactor Bldg Zones I & III Lost Once & Zone III Second Time.High Wind Conditions Caused Pressure Fluctuations of Exterior Delta Pressure Sensor.Sensor Rerouted (← links)
- 05000387/LER-1983-025-03, /03L-0:on 830204,reactor Recirculation Pump a Tripped off-line During Startup Test Program.Caused by Deficiency in Silicon Controlled Rectifier,Resulting in High Field Circuit Current.Voltage Regulator Board Replaced (← links)
- 05000387/LER-1983-022-03, /03L-0:on 830203,reagent Gas Bottle (Oxygen) for Hydrogen Analyzer Found Exhausted During Startup Test Program.Caused by Periodic Gas Bottle Pressure Check Omission & Inadequate Storeroom Min Inventory (← links)
- 05000387/LER-1982-053-03, /03L-0:on 821111,during Startup Testing Program, Control Structure Heating & Ventilation Sys Chlorine Detector Determined Inoperable.Caused by Clogged Wick in Chlorine Detector.Equipment Repaired (← links)
- 05000387/LER-1982-041-03, /03L-0:on 821013,turbine Bldg Special Particulate Iodine Noble Gas Monitor Taken Out of Svc.Alternate Sampling Commenced While Monitor Out of Svc.Sampling Discontinued Since Sping Operating During Sampling.No Caused Stated (← links)
- 05000387/LER-1982-035-03, /03L-0:on 821019,erratic Readings Received from Cooling Tower Flow Meter.Caused by Film Buildup on Sensor Element of Flow Meter.Sensor Cleaned (← links)
- 05000387/LER-1982-039-03, /03L-0:on 821008,open Bypass Valves Around Containment Atmosphere Particulate Monitors Allowed Flow Both Through & Around Monitors.Caused by Failure to Follow Check Off List.Event to Be Discussed W/All Shifts (← links)
- 05000387/LER-1982-038-03, /03L-0:on 821004,remote Sampling,Initiated Due to Inoperable Reactor Bldg Special Particulate Iodine Mobile Gas Monitor,Discontinued Prior to Complete Sign Off of Work Authorization.Caused by Personnel Error (← links)
- 05000387/LER-1982-033-03, /03L-0:on 820929,reactor Bldg Special Particulate Iodine Noble Gas Monitor Pump Tripped Off & Would Not Restart.Caused by Motor Problem.Motor Rewound & Pump Rebuilt (← links)
- 05000387/LER-1982-029-03, /03L-0:on 820923,HV161108A2 Isolation Valve Failed to Close When Remotely Actuated.Caused by Induced Voltage in Control Circuitry of Solenoid Valve.Appropriate Conductor Grounded & Design Change Initiated to Prevent Recurren (← links)
- 05000387/LER-1982-030-03, /03L-0:on 820922,when 250-volt Battery Charger for Dc Power Source Was Placed in Svc,Associated Capacitor Self Destructed.Old Style Capacitor Replaced.Design Mod Initiated (← links)
- 05000387/LER-1982-028-03, /03L-0:on 820922,fire Started in Motor Control Ctr.Caused by Personnel Inadvertently Grounding Live Bus Bar.Fire Extinquished,Bus Bar Cleaned,Rebuilt & Tested & Personnel Counseled (← links)
- 05000387/LER-1982-021-03, /03L:on 820910,while Performing Surveillance of Rod Worth Minimizer,Selection Error Indicating Light Did Not Operate Properly.Caused by One 28-volt Conductor Being Pulled Loose from Light Assembly Due to Stress (← links)
- 05000387/LER-1982-019-03, /03L-0:on 820912,during Startup Testing, Operational Condition 2 Entered Prior to Completion of Required Daily Surveillances.Caused by Incorrect Identification of Condition.Event Will Be Reviewed (← links)
- 05000387/LER-1982-017-03, /03L-0:on 820826,sprinkler Sys for Fire Zone 1-5A Was Out of Svc.Detector Reset Initiated on Fire Protection Panel in Control Room,But Required Reset of Priorities (RSP) Not Performed.Rsp Initiated (← links)
- 05000387/LER-1982-015-03, /03L-0:on 820824,from Start of Initial Fuel Load Until 820825,spray Pond Level & Temp Not Monitored.Caused by Omission of Tech Spec 4.7.1.3 Requirements from Procedures. Procedure Rewritten (← links)
- 05000387/LER-1982-016-01, /01P:on 820918,turbine Bldg Vent Monitor Sys Noble Gas Monitor Declared Out of Svc.Grab Sampling Once Per 8-h Initiated.Mechanical Vacuum Pump in Svc Until 820920 Contrary to Tech Specs.Cause Not Stated (← links)
- 05000387/LER-1982-014-03, /03L-0:on 820824,prior to Initial Criticality,Unit Taken from Operational Condition 5 to 4 W/O Shutdown Cooling Mode of RHR in Operation,As Required by Tech Spec.Initial Startup Procedure Superseded by Normal Startup Procedu (← links)
- 05000387/LER-1983-005-03, /03L-0:on 830106,during Startup Testing Program, Unidentified RCS Leakage Exceeded 5 Gpm.Caused by Valve Packing Failure.Valve Repacked (← links)
- 05000387/LER-1983-009-03, /03L-0:on 830104,average Power Range Monitor D Declared Inoperable After Failing Weekly Functional Test. Caused by Human Error.Channel Gains Adjusted (← links)
- 05000387/LER-1983-012-03, /03L-0:on 830113,during Startup Test Program, Reactor Recirculation Pump a Tripped Off.Caused by Defective Transformer That Had Shorted Secondary.Transformer Replaced. Pump Returned to Svc (← links)
- 05000387/LER-1983-013-03, /03L-0:on 830109,during Startup Test,Channel a as- Found Data Lost Due to Incorrect Use of Test Equipment. Caused by Inadvertently Inserting Pressure Regulator Before Pressure Indicator.Instrument Recalibr (← links)
- 05000387/LER-1982-003-01, /01T-1:on 820811,sprinkler Sys for Fire Zone 1-6A Discovered Not Installed in Areas Listed in Tech Specs & Fire Protection Review.Caused by Procedural Error.Sys to Be Required Only in Areas W/Redundant Equipment Cables (← links)
- 05000387/LER-1982-008-03, /03L-0:on 820801,surveillance Performed on Refueling Bridge w/out-of-date Procedure.Caused by Personnel Error.Surveillance Rerun W/Correct Revision (← links)
- 05000387/LER-1982-007-01, /01P-0:confirms 820825 Telcon Re re-evaluation of Allowable Leakage Rate During Standby Gas Treatment Sys Surveillance Test (← links)
- 05000387/LER-1982-006-03, /03L-0:on 820727,refueling Bridge Declared Operable Prior to Work Authorization Signoff.Caused by Personnel Oversight,Preventing Clear Understanding & Accepted Verbal Closure.Problem Discussed W/Each Shift (← links)
- 05000387/LER-1982-067-01, /01T-0:on 821224,grab Samples Not Taken Every 4 H While Main Condenser Offgas Hydrogen Monitor Inoperable. Caused by Lack of Communication Between Operations & Chemistry Group.Incident Reporting Procedure Changed (← links)
- 05000387/LER-1982-070-03, /03L-0:on 821208,while Reviewing Past Completed Surveillances for Determining Component Operability, Operational Condition 2 Entered Prior to Required Surveillances.Caused by Lack of Trigger Mechanism (← links)
- 05000387/LER-1982-063-03, /03L-0:on 821127,seven Instrument Valves Determined to Have Been Left Closed Which Isolated Instruments.Cause Not Stated.Valves Not Numbered or Clearly Assigned as Operations or I&C Responsibility (← links)
- 05000387/LER-1982-066-03, /03L-0:on 821201,rod Block Monitor Channel B Bypassed Due to Improper Indication of Reactor Power & Failure to Set Up to New Power Limit.Caused by 5-volt Dc Power Supply Activating Crowbar Function.Power Supply Reset (← links)
- 05000387/LER-1982-068-03, /03L-0:on 821201,discovered That Tech Spec Surveillance Requirement 4.7.6.3.2.a (Carbon Dioxide Storage Tank Level) Not Included in Any Surveillance Procedure. Caused by Human Error.Procedure Revised to Include Checks (← links)
- 05000387/LER-1982-062-01, /01P-0:on 821223,during Performance of Loss of Offsite Power Test,Both Standby Gas Treatment Sys Trains Failed.Caused by High Radiation Trip Due to Heater Not Raising Proper Air Temp within Time Limit.Mods Initiated (← links)
- 05000387/LER-1982-064-03, /03L-0:on 821127,as Power Increased Above 30%, Rod Block Monitor Did Not Activate.Caused by Circuitry Error in Design Package to Modify Average Power Range Monitor Gain Adjustment.Mod (Pmr 82-790) Implemented to Correct Logi (← links)
- 05000387/LER-1982-058-03, /03L-0:on 821122,during Startup Testing Program, full-in Position Lost on Rod 46-23 Causing Rod Withdrawal Block Preventing Rod Movement.Cause Unknown.Condition Would Not Repeat When Technicians Arrived to Work on Rod (← links)
- 05000387/LER-1982-061-01, /01P-0:on 821222,emergency Svc Water Pumps B & D Failed to Start.Caused by Loose Wire Connection on Relay in One Pump Logic & states-link Not Properly Tightened in Other Pump Circuit.Both Items Corrected.Confirms 821222 Telc (← links)
- 05000387/LER-1982-060-03, /03L-0:on 821124,during Startup Testing,Unit Operated W/O Required Min of 3 RCS Leak Detection Sys Operable.Misinterpretation of Tech Specs Responsible for Continued Operation.Tech Spec Clarification Initiated (← links)
- 05000387/LER-1982-059-03, /03L-0:on 821122,diesel Generator D Declared Inoperable After Failure of Prelube Oil Pump,Allowing Oil Temp to Decrease.Caused by Crushed Field inter-connection Wires,Apparently During Motor Casing Installation (← links)
- 05000387/LER-1982-019-01, /01T-0:on 820920,during Power Ascension Testing, Turbine Bldg Vent Monitor Sys Became Inoperable.Caused by Failure to Remove Mechanical Vacuum Pump from Svc.Pump Stopped & Steam Jet Air Ejectors Placed in Svc (← links)
- 05000387/LER-1982-018-03, /03L-0:on 820902,w/mode Switch in Refuel,Three Out of Four Source Range Monitors Were Inoperable.Caused by Inadvertent Stressing of Cables During Undervessel Work. Procedure Revised to Reduce Cable Wear (← links)
- 05000387/LER-1982-020-03, /03L-0:on 820903,after Both RHR Sys Trains Removed from Svc,Pressure & Temp Were Not Recorded.Caused by Operator Misjudgment.Operators Instructed to Log & Follow All Action Statements (← links)
- 05000387/LER-1982-009-03, /03L-0:on 820812,during Surveillance Testing of Standby Gas Treatment Sys,Air Modulating Damper Failed to Open on Sys Initiation.Caused by Faulty Relay,Due to Bad Amplifier.Amplifier Repaired (← links)
- 05000387/LER-1982-011-03, /03L-0:on 820823,new Breaker Settings Applied to Nine Breakers W/O Proper Review.No Cause Stated.Breakers Reset to Tech Spec Values.Breaker Test Procedure Revised to Ensure Tech Spec Review (← links)
- 05000387/LER-1982-010-03, /03L-0:on 820813,several Hydraulic Control Unit Accumulators Failed to Hold Acceptable Pressure Per Tech Spec.Caused by Leaking Ball Check Valves & Scram Inlet Valves.Valves Reworked & Valve Seats Replaced (← links)
- 05000387/LER-1982-005-01, /01P-0:control Room Emergency Outside Air Supply Sys Failed to Automatically Start on Isolation Signal (← links)
- 05000387/LER-1982-072-03, /03L-0:on 821210,while Performing Surveillance, One Control Rod Would Not Indicate at One Position.Possibly Caused by Intermittent Fault on Circuit Board.Printed Circuit Board Reinstalled (← links)
- 05000387/LER-1982-072, Forwards LER 82-072/03L-0 (← links)
- 05000387/LER-1982-069-03, /03L-0:on 821207,during Startup Testing,Hpci Sys Declared Operable Prior to Closing Out Open Equipment Release Form.Caused by Work Program Design Weakness.Present Work Practice Modified (← links)
- 05000387/LER-1982-069, Forwards LER 82-069/03L-0 (← links)
- 05000387/LER-1982-062, Forwards LER 82-062/01T-0 (← links)
- 05000387/LER-1982-061, Forwards LER 82-061/01T-0 (← links)
- 05000387/LER-1982-045-03, /03L-0:on 821025,essential Svc Water Pump Failed to Start.Cause Could Not Be Determined or Reproduced.Svc Pump Tested 5 Times W/O Recurrence of Failure (← links)
- 05000387/LER-1982-045, Forwards LER 82-045/03L-0 (← links)
- 05000387/LER-1982-040-03, /03L-0:on 821018,deluge Sys in CREOASS Initiated. Caused by Maint Personnel Bumping Fire Sys thermo-switch on Charcoal Beds.Charcoal Changed Out & Preventive Maint Procedures Modified to Valve Out Deluge Sys During Maint (← links)
- 05000387/LER-1982-040, Forwards LER 82-040/03L-0 (← links)
- 05000387/LER-1982-034-03, /03L-0:on 821011,during Startup Testing,Creoass Train a Declared Inoperable When Outside Air Damper Failed to Close.Caused by Inadequate Lubrication of Actuator Stem. Stem Lubricated & Damper Returned to Svc (← links)
- 05000387/LER-1982-034, Forwards LER 82-034/03L-0 (← links)
- 05000387/LER-1982-027-03, /03L-0:on 820920,two Drywell/Suppression Chamber Vacuum Breakers Gave False Position Indications During Stroking.Caused by Loose Couplings Connecting Limit Switch to Vacuum Relief Valve Shaft.Set Screw Replaced (← links)
- 05000387/LER-1982-027, Forwards LER 82-027/03L-0 (← links)
- 05000387/LER-1982-007, Forwards LER 82-007/01T-1 (← links)
- 05000387/LER-1983-098-03, /03L-0:on 830625,position of Valve Indeterminate Due to Dual Status Indication for Suppression pool-to- Drywell Vacuum Breaker.Caused by Insufficient Limit Switch Plunger Position.Limit Switches Adjusted (← links)
- 05000387/LER-1983-096-03, /03L-0:on 830624,RCIC Leak Detection B Power Failure Alarm Received.Undervoltage Trip Caused by Loss of Startup Transformer.Inverter Manually Reset (← links)
- 05000387/LER-1983-084-03, /03L-0:on 830524,during Surveillance Testing, Control Room Emergency Outside Air Supply Sys Fan Tripped. Caused by Out of Tolerance of Time Delay Relay for Heater Differential Temp.Relay Reset (← links)
- ML021230338 (redirect page) (← links)
- 05000387/LER-2002-008, Regarding Unauthorized Change in Mode (← links)
- 05000388/LER-2002-006, Operations Prohibited by Technical Specifications Due to Inoperable Reactor Core Isolation Cooling Check Valve (← links)
- 05000388/LER-2002-004, Regarding Unplanned RPS Actuation - Loss of Condenser Vacuum & Reactor Scram (← links)
- 05000388/LER-2002-005, Operations Prohibited by TS Due to Inoperable Main Steam Isolation Valve (← links)
- 05000387/LER-2002-007, For Susquehanna Unit 1 Operations Prohibited by Technical Specifications Due to Inoperable High Pressure Coolant Injection Check Valve (← links)
- 05000387/LER-2002-006, Re Unusual Event Declared Due to Onsite Explosion on Startup Transformer ST-02 (← links)
- 05000387/LER-2002-005, Re Dry Fuel Storage Container Filled with Incorrect Gas Due to Human Error (← links)
- 05000388/LER-2002-002, Re Loss of Control Structure Chiller Safety Function When 4.16 Kv Breakers Found Racked-Out (← links)
- 05000388/LER-2002-003, Re Low Service Water Flow Causes Temporary Loss of Control Structure Chillers (← links)
- 05000388/LER-2002-001, Operation Prohibited by Technical Specifications Due to Mispositioned 125 Vdc Transfer Switches (← links)
- 05000387/LER-2002-003, PPL Susquehanna, Unit 1 LER 02-003-00, Operations Prohibited by Technical Specification Due to Inoperable ATWS Recirculation Pump Trip Breaker (← links)
- 05000387/LER-2002-002, Re Main Steam Isolation Valve Total Leakage Exceeded Technical Specification Limit (← links)