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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

• 05000498/LER-1987-019, :on 871124,determined That Continuity of Slave Relay Contact in Train a of Containment Spray Sys Improperly Tested.Caused by Personnel Error.Relay Tested & Procedures for Testing Relays in Trains B & C Reviewed  + (02:06:23, 27 June 2025)
• 05000277/LER-1985-005, :on 850612,intermediate Range Monitors F & B Discovered Inoperable W/Reactor Protection Sys Channel B Logic Out of Tripped Condition,Violating Tech Specs.Caused by Procedural Deficiency.Procedure Revised  + (02:07:37, 27 June 2025)
• 05000327/LER-1987-040, :on 870113,problem W/Vulcanizing Silicone Foam,Sealant & Boot Seals Installed in Reactor Shield Bldg Identified.Caused by Matl Misapplication.Reactor Shield Bldg Mechanical Seals Reevaluated  + (02:08:15, 27 June 2025)
• 05000213/LER-1987-012, :on 870801,eddy Current Testing (ECT) Found Six Defective Steam Generator Tubes.Cause Unknown.Ect Continuing to Determine Specific Cause of Degradation  + (02:10:12, 27 June 2025)
• 05000414/LER-1986-025, :on 860603.steam Generator Main Feedwater Containment Isolation Bypass Control Valve D Not Retested After Maint Performed.Caused by Personnel Error & Mgt Deficiency.Maint Training Program Implemented  + (02:14:56, 27 June 2025)
• 05000327/LER-1987-046, :on 870722,util Informed by Westinghouse That Potential Exists for Unacceptable Dilution of ECCS During Large Break LOCA Due to Postulated Nonborated Water Addition to Sump.Evaluation Underway  + (02:15:01, 27 June 2025)
• 05000302/LER-1987-013, :on 870716,during Surveillance,Indication of Partial Trip in Emergency Feedwater Initiation & Control Sys (EFIC) Received.On 870716-18,output Breakers of EFIC a & B Channels Opened,Disabling Automatic Functions  + (02:38:24, 27 June 2025)
• 05000327/LER-1987-050, :on 870723,containment Spray Sys Pumps Could Not Deliver Flow Required by Plant Fsar.Caused by Design Deficiency.Pump Flow Orifice Bored Out & Tech Spec Change Requested  + (02:38:41, 27 June 2025)
• 05000414/LER-1986-045, :on 861011,turbine Driven Auxiliary Feedwater Pump Inoperable.Caused by Incorrect Installation of Solenoid Valve Per Incorrect Design Drawing.Solenoid Retubed & Associated Instrument Detail Drawing Corrected  + (02:40:32, 27 June 2025)
• 05000352/LER-1985-102, :on 851218,drywell Spray Header Outboard Isolation Valve Identified as Not Fully Closed.Caused by Improper Operation of Valve Operator.Valve Disassembled & Inspected During 1987 Refuel outage.W/870901 1tr  + (02:41:17, 27 June 2025)
• ML20237L461  + (02:41:42, 27 June 2025)
• ML20237L051  + (02:44:50, 27 June 2025)
• TAC:64210  + (02:48:01, 27 June 2025)
• ML20237K800  + (02:52:08, 27 June 2025)
• ML20237K759  + (02:52:25, 27 June 2025)
• ML20237K754  + (02:52:28, 27 June 2025)
• 05000352/LER-1987-035, :on 870715,unexpected Actuation of Nssss Occurred.Caused by Personnel Error Since Scope of Work Performed & Procedures Followed Not Specific.Preventive Maint Program Revised  + (02:52:42, 27 June 2025)
• ML20237K695  + (02:53:11, 27 June 2025)
• ML20237K684  + (02:53:15, 27 June 2025)
• ML20237K664  + (02:53:37, 27 June 2025)
• ML20237K658  + (02:53:43, 27 June 2025)
• ML20237K647  + (02:53:46, 27 June 2025)
• 05000352/LER-1987-039, :on 870731,technician Failed to Take Grab Sample of Reactor Encl Cooling Water Sys,Per Tech Specs. Caused by Personnel Error.Technicians Instructed on Importance of Sampling on Time  + (02:54:10, 27 June 2025)
• 05000354/LER-1987-018, :on 870224,unanticipated Failure of MSIV to Close on Signal Occurred.Caused by Accidental Intrusion of Foreign Matl.Solenoids in MSIV Pneumatic Valve Operator Replaced & MSIV Inoperability Verified  + (02:54:24, 27 June 2025)
• 05000245/LER-1987-024-01, :on 870715,initiation of Standby Gas Treatment Sys Occurred.Caused by Personnel Error.Lprm Cutting Process Stopped & Detector Lowered Into Spent Fuel Pool.Personnel Counseled Re Lifting LPRM Correctly  + (02:54:46, 27 June 2025)

• ML20237K521  + (02:55:02, 27 June 2025)

• ML20237K504  + (02:56:00, 27 June 2025)
• ML20237K489  + (02:56:07, 27 June 2025)
• ML20237K460  + (02:56:30, 27 June 2025)
• ML20237K454  + (02:56:35, 27 June 2025)
• 05000412/LER-1987-011-01, :on 870730,inadvertent Safety Injection Occurred Due to Low Steam Line Pressure.Caused by Personnel Error.Test Engineer Reassigned & Incident Will Be Reviewed at Safety Meetings  + (02:56:51, 27 June 2025)
• ML20237K388  + (02:57:39, 27 June 2025)
• ML20237K365  + (02:58:11, 27 June 2025)
• ML20237K348  + (02:58:17, 27 June 2025)
• ML20237K334  + (02:58:22, 27 June 2025)
• TAC:55865  + (02:59:44, 27 June 2025)
• 05000458/LER-1985-032, :on 851103,fuel Bldg HVAC Normal Supply & Exhaust Sys Isolated & Div I ESF Charcoal Filter Train Auto Started.Caused by Spurious Low Flow Signal Being Generated by Div I Flow Switch.Switch Recalibr  + (03:01:19, 27 June 2025)
• 05000341/LER-1987-019, :on 870523,standby Gas Treatment Sys Manual Actuation Puff Test Incorrectly Scheduled.Caused by Personnel Error.Program Revised to Reflect Correct Test Frequency  + (03:03:31, 27 June 2025)
• 05000322/LER-1987-022, :on 870604,HPCI Recirculation Valves Failed During motor-operated Valve Dynamic Testing.Mod to Disc of MOV-37 to Alleviate Local Pressure build-up Implemented & as Contingency,Actuator Upgrade Purchased  + (03:03:37, 27 June 2025)
• 05000338/LER-1987-017, :on 870715,unit Manually Tripped.Caused by Indications of Steam Generator Tube Rupture in Steam Generator C.Cooldown & Depressurization of RCS Conducted Per Station Emergency Operating Procedures  + (03:03:58, 27 June 2025)
• 05000267/LER-1987-017, :on 870710 & 11,grab Samples Not Collected from Loop II Steam Generator Penetration Interspace.Caused by Personnel Error & Deficient Procedure.Procedure Changes Will Be Developed & Completed by 870831  + (03:06:57, 27 June 2025)
• 05000416/LER-1986-029, :on 860826,discovered Incorrect Flow Measuring Device Coefficient Used in Establishing Coolant Flow to ESF Electrical Switchgear Room Coolers Resulting in Low Flows. Caused by Ae Design Error.Pipes Flushed  + (03:08:00, 27 June 2025)
• 05000267/LER-1986-019, :on 860506,unplanned Transient Increased Reactor Power Above Authorized Limit.Caused by Deficient Procedure Resulting in Valve Being Kept Open Too Long.Power Operation Limited.Special Procedures Issued  + (03:08:08, 27 June 2025)
• 05000317/LER-1987-007, :on 870401,mgt Decided to Shutdown Facility from 100% Power,Mode 1 Operation,To Mode 5 (Less than 200 F).Extensive Insp Program Undertaken to Look in Detail at Equipment within Scope of 10CFR50.49  + (03:08:56, 27 June 2025)
• 05000271/LER-1987-003, :on 870724,resident Inspector Noted That Calibr Procedure for Toxic Gas Monitor Chlorine Analyzer Did Not Satisfy Tech Spec Setpoint Requirements.Caused by Procedural Inadequacy.Calibr Procedure Revised  + (03:08:57, 27 June 2025)
• 05000413/LER-1986-057, :on 861024,determined That 53 Valves Motor Actuator Torque Switches May Have Been Set Incorrectly. Caused by Design,Mfg & Const/Installation Deficiency. Actuators Reset  + (03:09:06, 27 June 2025)
• 05000302/LER-1987-007, Extends Projected Due Date for Suppl to LER 87-007-00 from 870730 to 871030.Extra Time Needed for Satisfactory Analysis of Event  + (03:12:33, 27 June 2025)
• NUREG-1265, Forwards Agenda for NRC Research Meeting on Core Melt Progression Scheduled for 870901-03,NUREG-1265 & NUREG/CR-4883.W/o NUREGs  + (03:13:06, 27 June 2025)
• TAC:59646  + (03:13:12, 27 June 2025)
• 05000327/LER-1987-039, :on 870710,potential for Single Failure of Main Control Room Normal Pressurization Sys Observed.Root Cause & Proposed Corrective Action Under Investigation.Suppl to Rept Will Be Submitted by 871204  + (03:14:10, 27 June 2025)
• 05000333/LER-1987-011, :on 870728,electrical Conduit Fire Barriers Not Sealed W/Three H Fire Rated Seal.Caused by Use of Incomplete List of Fire Barrier Penetrations.Three H Fire Seals in Unsealed Penetrations Installed  + (03:16:44, 27 June 2025)