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| 05000313/LER-1981-001-01, /01T-0:on 810117,during Reactor Bldg Cooler Svc Water Lines Engineering Analysis,Discovered Previous Analyses Considering Cooling Unit Piping Nozzles as Rigid Anchors.Nozzle Loads Imposed by Vendor Overlooked | /01T-0:on 810117,during Reactor Bldg Cooler Svc Water Lines Engineering Analysis,Discovered Previous Analyses Considering Cooling Unit Piping Nozzles as Rigid Anchors.Nozzle Loads Imposed by Vendor Overlooked | |
| 05000313/LER-1981-001, Forwards LER 81-001/01T-0 | Forwards LER 81-001/01T-0 | |
| 05000368/LER-1981-001-03, /03L-0:on 810102,during Mode 1 Operation,Leak Was Found at Vent Line Weld on Charging Pump Stabilizer 2M115C. Leak Isolation Rendered Charging Pump 2P36C Inoperable. Caused by Dissolving Slag Inclusion.Weld Was Repaired | /03L-0:on 810102,during Mode 1 Operation,Leak Was Found at Vent Line Weld on Charging Pump Stabilizer 2M115C. Leak Isolation Rendered Charging Pump 2P36C Inoperable. Caused by Dissolving Slag Inclusion.Weld Was Repaired | |
| 05000368/LER-1981-001, Forwards LER 81-001/03L-0 | Forwards LER 81-001/03L-0 | |
| 05000368/LER-1981-002-03, /03L-0:on 810106,postulated Failure of Masonry Wall 24-B-217/218 Per IE Bulletin 80-11,resulted in Loss of Cables 2BS3L1 & 2BS3L2 to Containment Cooling Fans.Wall Braced in Accordance W/New Design Criteria | /03L-0:on 810106,postulated Failure of Masonry Wall 24-B-217/218 Per IE Bulletin 80-11,resulted in Loss of Cables 2BS3L1 & 2BS3L2 to Containment Cooling Fans.Wall Braced in Accordance W/New Design Criteria | |
| 05000368/LER-1981-002, Forwards LER 81-002/03L-0 | Forwards LER 81-002/03L-0 | |
| 05000313/LER-1981-002, Forwards LER 81-002/99X-0 | Forwards LER 81-002/99X-0 | |
| 05000313/LER-1981-002-99, /99X-0:on 810303,during Steam Generator Tubing Surveillance Insp,First Sample Results on E24A Found Three Tubes Exceeded Plugging Limit.Cause Not Stated | /99X-0:on 810303,during Steam Generator Tubing Surveillance Insp,First Sample Results on E24A Found Three Tubes Exceeded Plugging Limit.Cause Not Stated | |
| 05000313/LER-1981-003, Forwards LER 81-003/03L-0 | Forwards LER 81-003/03L-0 | |
| 05000313/LER-1981-003-03, /03L-0:on 810113,penetration Fire Barrier Between North Wall & Compressor C2B Removed W/O Establishing Fire Watch Per Tech Specs.Caused by Inadequate Instructions to Contractor Personnel.Contractor Procedures Modified | /03L-0:on 810113,penetration Fire Barrier Between North Wall & Compressor C2B Removed W/O Establishing Fire Watch Per Tech Specs.Caused by Inadequate Instructions to Contractor Personnel.Contractor Procedures Modified | |
| 05000368/LER-1981-003, Forwards LER 81-003/03L-0 | Forwards LER 81-003/03L-0 | |
| 05000368/LER-1981-003-03, /03L-0:on 810113,plant Computer Failed & Would Not Restart,Rendering Core Operating Limits Supervisory Sys Inoperable.Caused by Capacitor in Floating Point Power Supply & Generstor Noise Due to Short.Capacitor Replaced | /03L-0:on 810113,plant Computer Failed & Would Not Restart,Rendering Core Operating Limits Supervisory Sys Inoperable.Caused by Capacitor in Floating Point Power Supply & Generstor Noise Due to Short.Capacitor Replaced | |
| 05000313/LER-1981-004, Forwards LER 81-004/03L-0 | Forwards LER 81-004/03L-0 | |
| 05000313/LER-1981-004-03, /03L-0:on 810227,diesel Fire Pump Battery Bank Surveillance Test Found Not Completed within Grace Period. Caused by Failure to Notify Supervisor That Procedure Could Not Be Completed During Shift | /03L-0:on 810227,diesel Fire Pump Battery Bank Surveillance Test Found Not Completed within Grace Period. Caused by Failure to Notify Supervisor That Procedure Could Not Be Completed During Shift | |
| 05000368/LER-1981-004-03, /03L-0:on 810124,core Protection Calculator C Declared Inoperable.Caused by Failed Power Amplifier for C Excore Detector Which Caused Low Power Signal to Set Off Alarm,Alerting Staff.Amplifier Replaced | /03L-0:on 810124,core Protection Calculator C Declared Inoperable.Caused by Failed Power Amplifier for C Excore Detector Which Caused Low Power Signal to Set Off Alarm,Alerting Staff.Amplifier Replaced | |
| 05000368/LER-1981-004, Forwards LER 81-004/03L-0 | Forwards LER 81-004/03L-0 | |
| 05000368/LER-1981-005, Forwards LER 81-005/03L-0 | Forwards LER 81-005/03L-0 | |
| 05000368/LER-1981-005-03, /03L-0:on 810204,core Operating Limit Supervisory Sys Rendered Inoperable.Caused by Computer Failure.Software Reloaded & Computer Restarted.Backup Computer Will Be Installed | /03L-0:on 810204,core Operating Limit Supervisory Sys Rendered Inoperable.Caused by Computer Failure.Software Reloaded & Computer Restarted.Backup Computer Will Be Installed | |
| 05000313/LER-1981-005-03, /03L-0:on 810408,steam Driver Emergency Feedwater pump,P7A,was Started & Then Tripped by Turbine Overspeed Mechanism.Caused by Worn Edges on Trip Mechanism.Mechanism Adjusted to Latch Firmly.Preventive Maint Program Revised | /03L-0:on 810408,steam Driver Emergency Feedwater pump,P7A,was Started & Then Tripped by Turbine Overspeed Mechanism.Caused by Worn Edges on Trip Mechanism.Mechanism Adjusted to Latch Firmly.Preventive Maint Program Revised | |
| 05000313/LER-1981-005, Forwards LER 81-005/03L-0 | Forwards LER 81-005/03L-0 | |
| 05000368/LER-1981-006, Forwards LER 81-006/03L-0 | Forwards LER 81-006/03L-0 | |
| 05000368/LER-1981-006-03, /03L-0:on 810204,containment Sump Level Indicator 2LI-5645-1 Was Declared Inoperable.Caused by Defective Converter.Converter Replaced | /03L-0:on 810204,containment Sump Level Indicator 2LI-5645-1 Was Declared Inoperable.Caused by Defective Converter.Converter Replaced | |
| 05000313/LER-1981-006, Forwards LER 81-006/03L-0 | Forwards LER 81-006/03L-0 | |
| 05000313/LER-1981-006-03, /03L-0:on 810408,emergency Feedwater Feed Valve CV-2670 to Steam Generator a Control Power Fuse Blew on Valve Actuator.Caused by Fuse Opening on Transient Current. Fuse Replaced W/Slower Acting Fuse | /03L-0:on 810408,emergency Feedwater Feed Valve CV-2670 to Steam Generator a Control Power Fuse Blew on Valve Actuator.Caused by Fuse Opening on Transient Current. Fuse Replaced W/Slower Acting Fuse | |
| 05000368/LER-1981-007-03, /03L-0:on 810206,control Room Emergency Chiller, 2VE-1B,tripped.Caused by Low Suction Pressure Due to Leaking Expansion Valve.Valve Repaired & Sys Refilled W/Freon | /03L-0:on 810206,control Room Emergency Chiller, 2VE-1B,tripped.Caused by Low Suction Pressure Due to Leaking Expansion Valve.Valve Repaired & Sys Refilled W/Freon | |
| 05000368/LER-1981-007, Updated LER 81-007/03L-1:on 810206 & 0318,control Room Emergency Chillers 2VE-1B & 2VE-1A,respectively,were Declared Inoperable.Caused by Low Oil Pressure in Former & Oil Unloader Relief Misadjustment in Latter | Updated LER 81-007/03L-1:on 810206 & 0318,control Room Emergency Chillers 2VE-1B & 2VE-1A,respectively,were Declared Inoperable.Caused by Low Oil Pressure in Former & Oil Unloader Relief Misadjustment in Latter | |
| 05000313/LER-1981-007-03, /03L-0:on 810427,emergency Diesel Generator K4B Failed to Start,Tripping Lockout Relay & Loss of Excitation Relay.Caused by Blocking Device in Auxiliary Contacts of Loss of Excitation Relay.Device Removed.Procedure Revised | /03L-0:on 810427,emergency Diesel Generator K4B Failed to Start,Tripping Lockout Relay & Loss of Excitation Relay.Caused by Blocking Device in Auxiliary Contacts of Loss of Excitation Relay.Device Removed.Procedure Revised | |
| 05000313/LER-1981-007, Forwards LER 81-007/03L-0 | Forwards LER 81-007/03L-0 | |
| 05000368/LER-1981-008-03, /03L-0:on 810217,during Mode 3 Operation,Following Reactor Trip from 100% power,I-131 Dose Equivalent of 1.59 Uci Observed.Caused by Expected Spike in Coolant Activity. Liquid Processed Through Primary Demineralizers | /03L-0:on 810217,during Mode 3 Operation,Following Reactor Trip from 100% power,I-131 Dose Equivalent of 1.59 Uci Observed.Caused by Expected Spike in Coolant Activity. Liquid Processed Through Primary Demineralizers | |
| 05000368/LER-1981-008, Updated LER 81-008/03X-1:on 810217 & 0310,primary Coolant I-131 Dose Equivalent Value Observed Following Reactor Trip Exceeded Tech Spec 3.4.8.a.Caused by Expected Spike in Primary Coolant Activity Following Trip | Updated LER 81-008/03X-1:on 810217 & 0310,primary Coolant I-131 Dose Equivalent Value Observed Following Reactor Trip Exceeded Tech Spec 3.4.8.a.Caused by Expected Spike in Primary Coolant Activity Following Trip | |
| 05000313/LER-1981-008, Forwards LER 81-008/03L-0 | Forwards LER 81-008/03L-0 | |
| 05000313/LER-1981-008-03, /03L-0:on 810602,sodium Hydroxide Tank Level Fell Below Tech Spec Requirements.Caused by Test Procedure Assuming Familiarity W/Sys Layout & Idiosyncrasies.Tank Refilled | /03L-0:on 810602,sodium Hydroxide Tank Level Fell Below Tech Spec Requirements.Caused by Test Procedure Assuming Familiarity W/Sys Layout & Idiosyncrasies.Tank Refilled | |
| 05000368/LER-1981-009-03, /03L-0:on 810211,during Mode 1 Operation,While Performing Refueling Water Tank Level Indication Channel Checks,Channel a Indicated Greater than 100%,followed by Channel B 3-h Later.Caused by Frozen Transmitter Lines | /03L-0:on 810211,during Mode 1 Operation,While Performing Refueling Water Tank Level Indication Channel Checks,Channel a Indicated Greater than 100%,followed by Channel B 3-h Later.Caused by Frozen Transmitter Lines | |
| 05000368/LER-1981-009, Forwards LER 81-009/03L-0 | Forwards LER 81-009/03L-0 | |
| 05000313/LER-1981-009, Forwards LER 81-009/03L-0 | Forwards LER 81-009/03L-0 | |
| 05000313/LER-1981-009-03, /03L-0:on 810727,during Start Test of Steam Driven Emergency Feedwater Pump P7A,steam Generator B Valve CV-2617 Did Not Open on Demand.Caused by Excessive Play Due to Wear.Switch Replaced | /03L-0:on 810727,during Start Test of Steam Driven Emergency Feedwater Pump P7A,steam Generator B Valve CV-2617 Did Not Open on Demand.Caused by Excessive Play Due to Wear.Switch Replaced | |
| 05000368/LER-1981-010, Forwards LER 81-010/03L-0 | Forwards LER 81-010/03L-0 | |
| 05000368/LER-1981-010-03, /03L-0:on 810212,during Mode 1 Operation,Control Element Assembly Calculator (Ceac) 2 Found Inoperable.Cause Unknown.Ceac 2 Returned to Operable Status by Reinitializing Sys.All Failure Indications Returned to Normal | /03L-0:on 810212,during Mode 1 Operation,Control Element Assembly Calculator (Ceac) 2 Found Inoperable.Cause Unknown.Ceac 2 Returned to Operable Status by Reinitializing Sys.All Failure Indications Returned to Normal | |
| 05000313/LER-1981-010-03, /03L-0:on 810804,during Calibr,Reactor Protective System Channel B Scaled Difference in Amplifier Gain Setting Differed from Value in Power Escalation Test.Caused by Incorrect Pentiometer Adjustment.Procedure Revised | /03L-0:on 810804,during Calibr,Reactor Protective System Channel B Scaled Difference in Amplifier Gain Setting Differed from Value in Power Escalation Test.Caused by Incorrect Pentiometer Adjustment.Procedure Revised | |
| 05000313/LER-1981-010, Forwards LER 81-010/03L-0 | Forwards LER 81-010/03L-0 | |
| 05000368/LER-1981-011-03, /03L-0:on 810224,review of Plant Protection Sys Surveillance Procedure Identified That Channel A,Steam Generator High Level Trip Setpoint Less Conservative than Required.Caused by Deficiency in Surveillance Procedure | /03L-0:on 810224,review of Plant Protection Sys Surveillance Procedure Identified That Channel A,Steam Generator High Level Trip Setpoint Less Conservative than Required.Caused by Deficiency in Surveillance Procedure | |
| 05000368/LER-1981-011, Forwards LER 81-011/03L-0 | Forwards LER 81-011/03L-0 | |
| 05000313/LER-1981-011, Forwards LER 81-011/03L-0 | Forwards LER 81-011/03L-0 | |
| 05000313/LER-1981-011-03, /03L-0:on 810810,during Stroke Test,Recirculation Valve of Makeup Pump & Redundant Valve Failed to Show Full Closed Indication.Caused by Valve Torque Settings Too Low to Move Valves Under Sys Pressure.Settings Increased | /03L-0:on 810810,during Stroke Test,Recirculation Valve of Makeup Pump & Redundant Valve Failed to Show Full Closed Indication.Caused by Valve Torque Settings Too Low to Move Valves Under Sys Pressure.Settings Increased | |
| 05000368/LER-1981-012, Forwards LER 81-012/03L-0 | Forwards LER 81-012/03L-0 | |
| 05000368/LER-1981-012-03, /03L-0:on 810303,loop Two Svc Water Header Engineered Safety Feature Isolation Valve 2CV-1406-2 Would Not Open from Control Room.Caused by Valve Operator Torquing Out Due to Valve Stem Binding | /03L-0:on 810303,loop Two Svc Water Header Engineered Safety Feature Isolation Valve 2CV-1406-2 Would Not Open from Control Room.Caused by Valve Operator Torquing Out Due to Valve Stem Binding | |
| 05000313/LER-1981-012, Forwards LER 81-012/03L-0 | Forwards LER 81-012/03L-0 | |
| 05000313/LER-1981-012-03, /03L-0:on 810821,when Emergency Diesel Generator (EDG) Was Given Autostart Signal Following Turbine Trip,Edg Came to Speed But Failed to Tie In.Overcrank Annunciator Alarmed.Caused by Defective Speed Sensing Relay | /03L-0:on 810821,when Emergency Diesel Generator (EDG) Was Given Autostart Signal Following Turbine Trip,Edg Came to Speed But Failed to Tie In.Overcrank Annunciator Alarmed.Caused by Defective Speed Sensing Relay | |
| 05000313/LER-1981-013, Forwards LER 81-013/03L-0 | Forwards LER 81-013/03L-0 | |
| 05000368/LER-1981-013-03, /03X-1:on 810304,RCS Cold Leg Temp Indicator Discovered to Be Reading High.Caused by Defective Servo Motor.Motor Replaced.Indicator Calibr | /03X-1:on 810304,RCS Cold Leg Temp Indicator Discovered to Be Reading High.Caused by Defective Servo Motor.Motor Replaced.Indicator Calibr | |