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This page provides a simple browsing interface for finding entities described by a property and a named value. Other available search interfaces include the page property search, and the ask query builder.

List of results

• 05000277/LER-1976-053-03, /03L:on 760712,second Quarter Average Release Rate for Iodine & Particulate Exceeded Tech Spec.Caused by Shutdown & Depressurization for Refueling  + (07:18:27, 14 December 2024)
• ML20086F210  + (07:18:28, 14 December 2024)
• 05000277/LER-1976-054-01, /01T:on 760719,HPCI Turbine Speed Could Not Be Controlled by Controller or Test Pot.Caused by Two Defective 2166 Zener Diodes & Defective 747 Integrated Circuit Chip in Ramp Generator & Signal Converter Assembly  + (07:18:29, 14 December 2024)
• 05000277/LER-1976-055-01, /01T:on 760726,tripping of Reactor Bldg Ventilation Fans Resulted in Increase of Steam Tunnel Temp. Caused by Ventilation Sys Transient.Trip Points Returned to Normal & Recalibr After Ventilation Sys Returned to Svc  + (07:18:31, 14 December 2024)
• 05000277/LER-1976-056-03, /03L:on 760803,control Room Ventilation Radiation Monitor RIS-0160A Displayed Abnormal Reading.Caused by Failure of Integrating Circuit in Exponent Counting Circuit of Trapelo DRM-100 Digital Process Radiation Monitor  + (07:18:32, 14 December 2024)
• 05000277/LER-1976-058-01, /01T:on 760820,torus Vol Fell Below Tech Spec Level.Caused by Defective Positioner on Control Valve Returning Condensate to Torus.Valve Positioner Repaired & Valve Returned to Svc  + (07:18:35, 14 December 2024)
• NRC-95-4502, Forwards Proprietary Notrump Preliminary Validation Rept for Osu Tests. Encl Rept Withheld Per 10CFR2.790  + (07:18:36, 14 December 2024)
• 05000277/LER-1976-059-03, /03L:on 760824,outboard Drywell Purge Exhaust Valve A0-2507 Found Partially Closed.Caused by Sheared Alignment Key.Valve & Actuator Realigned & New Key Installed  + (07:18:37, 14 December 2024)
• 05000277/LER-1976-060-03, /03L:on 760821,improper Sample Obtained from Drywell Radioactive Gas Sampling Sys Due to Leakage.Caused by Loose Fitting on Electrical Penetration.Fitting Tightened  + (07:18:39, 14 December 2024)
• 05000277/LER-1976-061-03, /03L:on 760823,drywell Radioactive Gas Sample Pumps Tripped & Sample Sys Isolated,Removing Sys from Svc. Relay GE CR120AD04041AA Failed in Fail Safe Position.Relay Replaced & Sys Returned to Svc  + (07:18:41, 14 December 2024)
• 05000277/LER-1976-062-01, /01T:on 760825,suppressor on Main Steam Relief Valve Discharge Line C Found W/Empty Reservoir.No Apparent Cause Found.Suppressor Refilled & Leak Checked Prior to Reinstallation  + (07:18:43, 14 December 2024)
• 05000277/LER-1976-063-01, /01T:on 760825,suppressor on Recirculation Pump B Found W/Empty Reservoir.Caused by Broken Sight Glass.Site Glass Replaced & Suppressor Refilled & Checked for Leaks  + (07:18:45, 14 December 2024)
• 05000277/LER-1976-064-03, /03L:on 760829,containment Atmosphere Dilution Sys Declared Inoperable Because Liquid Nitrogen Tank Relief Valve Failed to Reseat,Blowing Down Content Below Limits. Blowback Ring Replaced  + (07:18:46, 14 December 2024)
• 05000277/LER-1976-065-36, /03L:on 760828,APRM a Trip Points Found to Be Less Conservative than Tech Spec Required W/Reactor in Run Mode. Caused by Instrument Drift.Aprm Recalibr & Returned to Svc  + (07:18:48, 14 December 2024)
• BECO-LTR-91-995, Ack Receipt of Requesting That Util Respond to Review Comments of T Urbanik (Kld Assoc) Re Evacuation Time Estimate Sensitivity Study for Beach Populations.Util Already Responded to Issues Raised by Kld Assoc  + (07:18:49, 14 December 2024)
• 05000454/LER-1991-005-08, :on 911027,Mode 4 Entered W/Containment Spray Sys & ECCS Recirculation Sump Isolation Valves Inoperable. Caused by Control Room Personnel Failure.Mode Change Checklists Will Be Revised  + (07:18:51, 14 December 2024)
• ML20086F181  + (07:18:53, 14 December 2024)
• ML20086F176  + (07:18:53, 14 December 2024)
• ML20086F161  + (07:18:54, 14 December 2024)
• RBG-35-981, Informs of Two Deviations Between Plant & Simulator Resulting from Mods to Plant Control Room,Per Exceptions Noted in 901217 Submittal of NRC Form 474, Simulation Facility Certification  + (07:18:54, 14 December 2024)
• BECO-LTR-91-999, Responds to Violations Noted in Electrical Distribution Sys Functional Insp Rept 50-293/91-80 on 910722-26.Corrective Actions:Personnel Received Root Cause Analysis Training & Root Cause Analysis & Evaluation Procedures to Be Revised  + (07:18:55, 14 December 2024)
• ML20086F157  + (07:18:56, 14 December 2024)
• 05000293/LER-1991-026, :on 911030 & 31,automatic Actuations Occurred in RWCU Sys Portion of Primary Containment Isolation Control Sys.Possibly Caused by Momentary Fluctuations in RWCU Sys Flow.High Flow Sensor Settings Verified  + (07:18:57, 14 December 2024)
• ML20086F145  + (07:18:58, 14 December 2024)
• 05000000/LER-1977-005, Updated LER 77-005/1T:on 770114,failure of High Pressure Svc Water/Emergency Svc Water & Emergency Cooling Water Pumps to Meet FSAR Seismic Requirements Noted.Caused by Change in Calculation Techniques  + (07:18:59, 14 December 2024)

• 05000000/LER-1977-005-01, /1P:on 770114,failure of High Pressure Svc Water/Emergency Svc Water & Emergency Cooling Water Pumps to Meet FSAR Seismic Requirements Noted.Caused by Change in Calculational Techniques.Bolts/Restraints to Be Added  + (07:19:00, 14 December 2024)

• ML20086F110  + (07:19:01, 14 December 2024)
• ML20086F101  + (07:19:02, 14 December 2024)
• ML20086F080  + (07:19:03, 14 December 2024)
• RBG-41682, Informs That Pending Resolution of 950525 Submittal of 10CFR50.90 Change,Requesting Exception to Physical Security Plan,C/A Commitment Per Violation 50-458/9505-01 to Modify Backup Power Supply for Security Sys Placed on Hold  + (07:19:03, 14 December 2024)
• ML20086F073  + (07:19:04, 14 December 2024)
• ML20086F069  + (07:19:04, 14 December 2024)
• 05000277/LER-1977-001-01, /01T:on 770104,reservoirs of Hydraulic Snubber Relief Valves RV-71E & SS-C6 Found Empty.Caused by Reservoir Leak & Loose Locking Nut Allowing Unit to Turn Upside Down. Repairs Made & Reservoirs Filled  + (07:19:06, 14 December 2024)
• 05000277/LER-1977-002-03, /03L:on 770102,control Rods 30-27 & 54-23 Did Not Fully Insert on Auto Scram Signal.Cause Undetermined.Rods Successfully scram-timed & friction-tested  + (07:19:08, 14 December 2024)
• 05000277/LER-1977-003-01, /01T:on 770103,insp of Four Relief Valves Revealed Delamination & Overheating of Air Operator Diaphragms.Cause Not Stated.Diaphragms Replaced  + (07:19:10, 14 December 2024)
• 05000277/LER-1977-004-01, /01T:on 770106,main Steam Relief Valve 71E Failed Open.Caused by Excessive Pilot Valve Seat Leakage.Valve 71D Replaced.Pilot Valve Section Replaced on Valves 71E & 71K  + (07:19:11, 14 December 2024)
• 05000277/LER-1977-006-03, /03L:on 770111,transient in-core Machine Probe Travelled Beyond in-shield Limit Switch During Withdrawal. Caused by Personnel Misoperation & Short Circuit in Backup Circuit.Short Corrected  + (07:19:13, 14 December 2024)
• 05000277/LER-1977-007-03, /03L:on 761121,rod Block Monitor Functional Surveillance Test Not Performed for Nov 1976.Caused by Personnel Error.Test Performed on Schedule in Dec  + (07:19:15, 14 December 2024)
• 05000261/LER-1977-001, :on 770124,during Normal Operations Boric Acid Transfer Pump B Tripped Due to High Pump Motor Temp Cutout. Caused by Equipment Malfunction.Pump Balance Line Cleaned & Restarted  + (07:19:18, 14 December 2024)
• 05000261/LER-1977-002, :on 770125,flow Paths from Boric Acid Storage Tanks Made Inoperable for Maint of Two Chemical & Vol Control Sys Valves.Caused by Personnel Error.Personnel Lectured to Ensure Tech Specs Understood  + (07:19:21, 14 December 2024)
• 05000261/LER-1977-003, :on 770131,during Normal Operation,Boric Acid Transfer Pump B Tripped Due to High Pump Motor Temp Cutout. Caused by Improper Setting of Motor Temp Cutout.Motor Temp Cutout Reset.New Stator Installed  + (07:19:23, 14 December 2024)
• 05000261/LER-1977-004, :on 770317,while Constant Axial Offset Control Out of Svc,Axial Flux Differences Not Logged as Required Per Plant Procedures.Caused by Failure to Maintain Log.Operating Procedures & Out of Svc Logs Combined  + (07:19:25, 14 December 2024)
• 05000261/LER-1977-005, :on 770324,containment Spray Pump a Discovered Not in Svc.Caused by Personnel Error.Personnel Instructed to Review Applicable Tech Specs Re Equipment Required for Critical Plant Operations  + (07:19:27, 14 December 2024)
• 05000261/LER-1977-006, :on 770326,during 0% Power,Valve V2-14A Failed to Open While Attempting to Feed Steam Generator a Through Valve W/Steam Driven Auxiliary Feedwater Pump.Caused by Binding Valve Seat Surfaces.Valve Recycled  + (07:19:29, 14 December 2024)
• 05000261/LER-1977-007, :on 770422,isolation Valve for Compressed Air Supply Discovered Closed.Caused by Personnel Error.Valve Opened.Penetration Pressurized  + (07:19:30, 14 December 2024)
• 05000261/LER-1977-008, :on 770424,control Rod N-9 Failed to Fall Into Core Following Power Reactor Trip.Caused by Drive Mechanism Malfunction.Shutdown Bank a Withdrawn & Realigned w/N-9.Rod Drop Test Performed  + (07:19:32, 14 December 2024)
• ML20086F026  + (07:19:35, 14 December 2024)
• ML20086F020  + (07:19:40, 14 December 2024)
• ML20086E997  + (07:19:43, 14 December 2024)
• ML20086E980  + (07:19:44, 14 December 2024)
• 05000455/LER-1991-004-13, :on 911030,spurious Train B Feedwater Isolation Signal Generated,Causing Tempering Line Flow Control & Downstream Isolation Valves to Close.Caused by Failure of Logic Card.Isolation Reset  + (07:19:48, 14 December 2024)