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| 05000267/LER-1981-001, Forwards LER 81-001/03L-0.Includes Narrative Description of Event Re High Outlet Temp in Pcrv Cooling Water Sys | Forwards LER 81-001/03L-0.Includes Narrative Description of Event Re High Outlet Temp in Pcrv Cooling Water Sys | |
| 05000267/LER-1981-001-03, /03L-0:on 801230,outlet Temp of Loop 2 Pcrv Cooling Water Sys Exceeded Tech Spec Level.Caused by High Setpoint of Cooling Water Temp Controller Following Calibr. Controller Reset & Operators Will Be Reinstructed on Sys | /03L-0:on 801230,outlet Temp of Loop 2 Pcrv Cooling Water Sys Exceeded Tech Spec Level.Caused by High Setpoint of Cooling Water Temp Controller Following Calibr. Controller Reset & Operators Will Be Reinstructed on Sys | |
| 05000267/LER-1981-002-03, /03L-0:on 810107,during Normal Operation,Sampling Requirements of SR NR1.1 Found Not Met for Day shift,801225. Caused by Personnel Error.Sampling Resumed on Next Shift & Personnel Reinstructed Re Importance of Requirements | /03L-0:on 810107,during Normal Operation,Sampling Requirements of SR NR1.1 Found Not Met for Day shift,801225. Caused by Personnel Error.Sampling Resumed on Next Shift & Personnel Reinstructed Re Importance of Requirements | |
| 05000267/LER-1981-002, Forwards LER 81-002/03L-0 | Forwards LER 81-002/03L-0 | |
| 05000267/LER-1981-003-03, /03L-0:on 810106,during Test,One Channel of 1D Helium Circulator Drain Malfunction Found Inoperable.Caused by Blown Switch Module Fuse.Fuse Replaced & Switch Returned to Svc | /03L-0:on 810106,during Test,One Channel of 1D Helium Circulator Drain Malfunction Found Inoperable.Caused by Blown Switch Module Fuse.Fuse Replaced & Switch Returned to Svc | |
| 05000267/LER-1981-003, Forwards LER 81-003/03L-0 | Forwards LER 81-003/03L-0 | |
| 05000267/LER-1981-004-03, /03L-0:on 810115,high Residual Chlorine Levels Found in Circulating Water Sys Liquid Effluent Sample.Cause Unknown.Subsequent Samples Normal | /03L-0:on 810115,high Residual Chlorine Levels Found in Circulating Water Sys Liquid Effluent Sample.Cause Unknown.Subsequent Samples Normal | |
| 05000267/LER-1981-004, Forwards LER 81-004/03L-0 | Forwards LER 81-004/03L-0 | |
| 05000267/LER-1981-005, Forwards LER 81-005/03L-0 | Forwards LER 81-005/03L-0 | |
| 05000267/LER-1981-005-03, /03L-0:on 810107,during Surveillance Testing,Trip Setting on PDIS-21177 Bearing Water Differential Pressure Switch Found Below Tech Spec Limit.Caused by Instrument Drift.Switch Adjusted & Returned to Svc | /03L-0:on 810107,during Surveillance Testing,Trip Setting on PDIS-21177 Bearing Water Differential Pressure Switch Found Below Tech Spec Limit.Caused by Instrument Drift.Switch Adjusted & Returned to Svc | |
| 05000267/LER-1981-006-03, During Annual Testing & Calibr,Six of 12 Helium Circulator Seal Malfunction Pressure Differential Switch Units Tripped Outside Limits.Caused by Dirt Accumulation in Electrical Switches.Switches Replaced | During Annual Testing & Calibr,Six of 12 Helium Circulator Seal Malfunction Pressure Differential Switch Units Tripped Outside Limits.Caused by Dirt Accumulation in Electrical Switches.Switches Replaced | |
| 05000267/LER-1981-006, Forwards LER 81-006/03L-0 | Forwards LER 81-006/03L-0 | |
| 05000267/LER-1981-007, Forwards LER 81-007/03T-0 | Forwards LER 81-007/03T-0 | |
| 05000267/LER-1981-007-03, /03T-0:on 810108,during Pcrv Cooling Water Sys Data Evaluation,Violation of Limiting Conditions of Operation Found Re Loop 2 Inlet & Outlet Average Temp Below Tech Spec Limit.Caused by Insufficient Heat Input | /03T-0:on 810108,during Pcrv Cooling Water Sys Data Evaluation,Violation of Limiting Conditions of Operation Found Re Loop 2 Inlet & Outlet Average Temp Below Tech Spec Limit.Caused by Insufficient Heat Input | |
| 05000267/LER-1981-008, Forwards LER 81-008/03L-0 | Forwards LER 81-008/03L-0 | |
| 05000267/LER-1981-008-03, /03X-2:on 810120,during Primary Coolant Pressure Scram,Calibr Found Voltage Outputs of Three Pressure Transmitters High.Caused by Instrument Drift.Pressure Transmitters Calibr | /03X-2:on 810120,during Primary Coolant Pressure Scram,Calibr Found Voltage Outputs of Three Pressure Transmitters High.Caused by Instrument Drift.Pressure Transmitters Calibr | |
| 05000267/LER-1981-009, Forwards LER 81-009/03L-0.Detailed Event Analysis Submitted | Forwards LER 81-009/03L-0.Detailed Event Analysis Submitted | |
| 05000267/LER-1981-009-03, /03L-0:on 810116-0131,plant Operated in Degraded Mode on Five Occasions.Caused by Moisture Outgassing from Core Graphite Due to Increased Power Level.Average Core Outlet Temp Reduced & Purification Sys Removed | /03L-0:on 810116-0131,plant Operated in Degraded Mode on Five Occasions.Caused by Moisture Outgassing from Core Graphite Due to Increased Power Level.Average Core Outlet Temp Reduced & Purification Sys Removed | |
| 05000267/LER-1981-010-03, /03L-0:on 810120,five Sample Flow Circuits Found Out of Calibr.Caused by Change of Instrument Characteristics.Calibr Values Revised & Flow Transmitters Recalibr.Alarm Setpoint Functional Test Values Also Changed | /03L-0:on 810120,five Sample Flow Circuits Found Out of Calibr.Caused by Change of Instrument Characteristics.Calibr Values Revised & Flow Transmitters Recalibr.Alarm Setpoint Functional Test Values Also Changed | |
| 05000267/LER-1981-010, Forwards LER 81-010/03L-0 | Forwards LER 81-010/03L-0 | |
| 05000267/LER-1981-011, Forwards LER 81-011/03L-0 | Forwards LER 81-011/03L-0 | |
| 05000267/LER-1981-011-03, /03L-0:on 810121,liquid Nitrogen Storage Tank Level Noted Below Min Required.Caused by Sys Usage & Late Delivery of Liquid Nitrogen.Delivery Restored Tank Levels to Acceptable Values.Second Load Delivered to Top Off Tank | /03L-0:on 810121,liquid Nitrogen Storage Tank Level Noted Below Min Required.Caused by Sys Usage & Late Delivery of Liquid Nitrogen.Delivery Restored Tank Levels to Acceptable Values.Second Load Delivered to Top Off Tank | |
| 05000267/LER-1981-012-03, /03L-0:on 810127,six of Twelve Steam Pipe Rupture (Pipe Cavity)Ultrasonic Noise Channels Had Unacceptably Low Response to Known Noise Source During Test.Caused by Microphone &/Or Transmitter Gain Reduced to Stop Tripping | /03L-0:on 810127,six of Twelve Steam Pipe Rupture (Pipe Cavity)Ultrasonic Noise Channels Had Unacceptably Low Response to Known Noise Source During Test.Caused by Microphone &/Or Transmitter Gain Reduced to Stop Tripping | |
| 05000267/LER-1981-012, Forwards LER 81-012/03L-0 | Forwards LER 81-012/03L-0 | |
| 05000267/LER-1981-013-01, /01T-0:on 810203,following Liquid Waste Release 429,tritium Concentration Exceeded Tech Spec.Caused by Sys Design Inadequacy W/Oil Separator on Liquid Waste Discharge Line.Bypass Installed Around Oil Separator | /01T-0:on 810203,following Liquid Waste Release 429,tritium Concentration Exceeded Tech Spec.Caused by Sys Design Inadequacy W/Oil Separator on Liquid Waste Discharge Line.Bypass Installed Around Oil Separator | |
| 05000267/LER-1981-013, Forwards LER 81-013/01T-0.Detailed Event Analysis Submitted | Forwards LER 81-013/01T-0.Detailed Event Analysis Submitted | |
| 05000267/LER-1981-014, Forwards LER 81-014/03L-0.Detailed Summary Also Encl | Forwards LER 81-014/03L-0.Detailed Summary Also Encl | |
| 05000267/LER-1981-014-03, /03L-0:on 810104,instrument Air Compressors 1C & 1A Out of Svc,Leaving Only Compressor 1B in Svc.Caused by Compressor 1C Tripping on High Discharge Air Temp & Compressor 1A Being Cleared Out for Insp & Repairs | /03L-0:on 810104,instrument Air Compressors 1C & 1A Out of Svc,Leaving Only Compressor 1B in Svc.Caused by Compressor 1C Tripping on High Discharge Air Temp & Compressor 1A Being Cleared Out for Insp & Repairs | |
| 05000267/LER-1981-015, Forwards LER 81-015/03L-0.Detailed Event Analysis Encl | Forwards LER 81-015/03L-0.Detailed Event Analysis Encl | |
| 05000267/LER-1981-015-03, /03L-0:on 810204-0220,plant Operated in Degraded Mode on Nine Occasions.Causes Include Increased Oxidant Outgassing After Power Increase & Moisture Introduced Into Primary Coolant as Part of Approved Test | /03L-0:on 810204-0220,plant Operated in Degraded Mode on Nine Occasions.Causes Include Increased Oxidant Outgassing After Power Increase & Moisture Introduced Into Primary Coolant as Part of Approved Test | |
| 05000267/LER-1981-016-03, During Testing,Three of 12 Helium Circulator Seal Malfunction Pressure Differential Switch Units Tripped Outside Limits.Caused by Dirt Accumulation in Electrical Switches.Switches Replaced | During Testing,Three of 12 Helium Circulator Seal Malfunction Pressure Differential Switch Units Tripped Outside Limits.Caused by Dirt Accumulation in Electrical Switches.Switches Replaced | |
| 05000267/LER-1981-016, Forwards LER 81-016/03L-0 | Forwards LER 81-016/03L-0 | |
| 05000267/LER-1981-017-03, /03L-0:on 810217,standby Diesel Engine 1B Tripped on High Cooling Water Temp.Caused by Sticking Temp Control Valve.Valve Disassembled,Cleaned & Returned to Svc | /03L-0:on 810217,standby Diesel Engine 1B Tripped on High Cooling Water Temp.Caused by Sticking Temp Control Valve.Valve Disassembled,Cleaned & Returned to Svc | |
| 05000267/LER-1981-017, Forwards LER 81-017/03L-0 | Forwards LER 81-017/03L-0 | |
| 05000267/LER-1981-018-03, /03L-0:on 810214,sample Flow Alarm Setpoints of Three Dewpoint Moisture Monitors Found Outside Tech Spec. Probably Caused by Previous Misadjustment.Trip Points Readjusted | /03L-0:on 810214,sample Flow Alarm Setpoints of Three Dewpoint Moisture Monitors Found Outside Tech Spec. Probably Caused by Previous Misadjustment.Trip Points Readjusted | |
| 05000267/LER-1981-018, Forwards LER 81-018/03L-0.Detailed Event Analysis Encl | Forwards LER 81-018/03L-0.Detailed Event Analysis Encl | |
| 05000267/LER-1981-019, Forwards LER 81-019/03L-0.Detailed Event Analysis Encl | Forwards LER 81-019/03L-0.Detailed Event Analysis Encl | |
| 05000267/LER-1981-019-03, /03L-0:on 810220,plant Operated in Degraded Mode to Repair Pressure Control Valve PV-21243-1.Caused by Excessive Leakage Through 1/2-inch Masoneilan Pressure Control Valve.Valve Stroke Lengthened.Seat & Stem Replaced | /03L-0:on 810220,plant Operated in Degraded Mode to Repair Pressure Control Valve PV-21243-1.Caused by Excessive Leakage Through 1/2-inch Masoneilan Pressure Control Valve.Valve Stroke Lengthened.Seat & Stem Replaced | |
| 05000267/LER-1981-020, Forwards LER 81-020/03L-0.Detailed Event Analysis Encl | Forwards LER 81-020/03L-0.Detailed Event Analysis Encl | |
| 05000267/LER-1981-020-03, /03L-0:on 810226,primary Coolant Moisture & Oxidants Exceeded Limits.Caused by Circulator Buffer Sys Upset & Helium Circulator Trip Due to 810223 Reactor Scram. Reactor Power Reduced Until Moisture Level Decreased | /03L-0:on 810226,primary Coolant Moisture & Oxidants Exceeded Limits.Caused by Circulator Buffer Sys Upset & Helium Circulator Trip Due to 810223 Reactor Scram. Reactor Power Reduced Until Moisture Level Decreased | |
| 05000267/LER-1981-021, Forwards LER 81-021/03L-0.Detailed Event Analysis Encl | Forwards LER 81-021/03L-0.Detailed Event Analysis Encl | |
| 05000267/LER-1981-021-03, /03L-0:on 810302,liquid Nitrogen Storage Tank Level Lower than Tech Spec Requires.Caused by Sys Usage & Unavailable Recondensers.Level Restored W/Two Loads | /03L-0:on 810302,liquid Nitrogen Storage Tank Level Lower than Tech Spec Requires.Caused by Sys Usage & Unavailable Recondensers.Level Restored W/Two Loads | |
| 05000267/LER-1981-022, Forwards LER 81-022/03L-0.Detailed Event Analysis Encl | Forwards LER 81-022/03L-0.Detailed Event Analysis Encl | |
| 05000267/LER-1981-022-03, /03L-0:on 810310,found That Total Dissolved Solids in Plant Nonradioactive Liquid Waste Effluent Exceeded Tech Specs on 810224.Caused by Restoration of Water Sys Blowdown at High Rate.Blowdown Reduced | /03L-0:on 810310,found That Total Dissolved Solids in Plant Nonradioactive Liquid Waste Effluent Exceeded Tech Specs on 810224.Caused by Restoration of Water Sys Blowdown at High Rate.Blowdown Reduced | |
| 05000267/LER-1981-023, Forwards LER 81-023/03L-0.Detailed Event Analysis Encl | Forwards LER 81-023/03L-0.Detailed Event Analysis Encl | |
| 05000267/LER-1981-023-03, /03L-0:on 810310,during Release of Reactor Bldg Sump,Sump Pump Effluent Discharge Proportional Sampler Found Inoperable.Caused by Error in Instructions.New Instructions Issued to Assure Sampler Operability | /03L-0:on 810310,during Release of Reactor Bldg Sump,Sump Pump Effluent Discharge Proportional Sampler Found Inoperable.Caused by Error in Instructions.New Instructions Issued to Assure Sampler Operability | |
| 05000267/LER-1981-024-03, During Testing,Five of 12 Helium Circulator Seal Malfunction Pressure Differential Switch Units Tripped Outside Limits.Caused by Accumulation of Dirt on Switches.Switches Replaced | During Testing,Five of 12 Helium Circulator Seal Malfunction Pressure Differential Switch Units Tripped Outside Limits.Caused by Accumulation of Dirt on Switches.Switches Replaced | |
| 05000267/LER-1981-024, Forwards LER 81-024/03L-0.Detailed Event Analysis Encl | Forwards LER 81-024/03L-0.Detailed Event Analysis Encl | |
| 05000267/LER-1981-025, Forwards LER 81-025/03L-0.Detailed Event Analysis Encl | Forwards LER 81-025/03L-0.Detailed Event Analysis Encl | |
| 05000267/LER-1981-025-03, /03X-1:on 810317,liquid Nitrogen Storage Tank Level Decreased to Below 650 Gallons.Caused by Loss of Power to Fill Line Isolation Valve.Circuit Breaker Reclosed.Level Reestablished.Bypass Valve Installed Around Converter | /03X-1:on 810317,liquid Nitrogen Storage Tank Level Decreased to Below 650 Gallons.Caused by Loss of Power to Fill Line Isolation Valve.Circuit Breaker Reclosed.Level Reestablished.Bypass Valve Installed Around Converter | |
