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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
- ML20077M187 + (12:02:30, 26 May 2025)
- ML20077L169 + (12:03:43, 26 May 2025)
- TAC:44300 + (12:04:03, 26 May 2025)
- TAC:44467 + (12:04:04, 26 May 2025)
- 05000325/LER-1983-019-03, /03L-0:on 830425,standby Liquid Control Sys Relief Valves 1-C41-F029A & B Lifted at Setpoints Exceeding Tech Specs.Caused by Out of Tolerance Relief Valve Settings. Valves Adjusted + (12:04:08, 26 May 2025)
- TAC:44398 + (12:04:12, 26 May 2025)
- A820021, Responds to NRC Re Violations Noted in IE Insp Rept 50-298/82-26.Corrective Actions:Qa Program Revised to Require Notification of Plant Mgt During Course of Evaluating Commercial Grade Relays for Safety Sys + (12:04:19, 26 May 2025)
- ML20077K091 + (12:05:06, 26 May 2025)
- ML20077J904 + (12:05:38, 26 May 2025)
- 05000348/LER-1991-007, :on 910629,reactor Trip Occurred.Caused by Detection of phase-to-ground Fault by Protective Relaying for Y Winding of 1B Unit Auxiliary Transformer.Transformer Removed from Svc,Isolated & Grounded + (12:05:58, 26 May 2025)
- IR 05000334/2020010 + (12:06:38, 26 May 2025)
- ML20077J242 + (12:07:01, 26 May 2025)
- NLS2020014, Nebraska Public Power District - Report of Changes to Emergency Plan Implementing Procedure Cooper Nuclear Station, Docket No. 50-298, DPR-46 + (12:07:15, 26 May 2025)
- 05000317/LER-1983-033-03, /03L-0:on 830630,routine Chemical Analysis Revealed Boric Acid Concentration in Boric Acid Storage Tanks 11 & 12 Exceeded 8% Limit.Caused by Insufficient Recirculation.Longer Recirculation Started + (12:07:36, 26 May 2025)
- 05000321/LER-1983-036-01, Plant Review Board Determined Lack of Administrative Control in Complying W/Cable & Cable Way Installation.Caused by Lack of Procedure Instructions in Delineating Responsibilities + (12:08:31, 26 May 2025)
- 05000346/LER-1981-070-03, Control Rod Drive Trip Breaker B Failed to Trip Consistently During Anticipatory Reactor Trip Sys Trip Test.Caused by Binding in Undervoltage Coil Device Linkage of Trip Breaker + (12:10:18, 26 May 2025)
- 05000333/LER-1983-021-03, During Mgt Review of Instrument Surveillance Procedure F-ISP-66-1, Scram Discharge Vol High Level Instrument Calibr, Rod Block Calibr Not Performed within 7 Days of Shutdown + (12:10:40, 26 May 2025)
- 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 + (12:11:38, 26 May 2025)
- 05000267/LER-1980-020-03, During Testing,Two of 12 Helium Circulator Seal Malfunction Pressure Differential Switch Units Tripped Outside Limits.Caused by Accumulation of Dirt in Switches.Switches Replaced + (12:11:40, 26 May 2025)
- 05000267/LER-1980-007-03, During Testing,Four of 12 Helium Circulator Seal Malfunction Pressure Differential Switch Units Tripped Outside Limits.Caused by Accumulation of Dirt on Switches.Switches Replaced + (12:11:42, 26 May 2025)
- ML20077G056 + (12:11:50, 26 May 2025)
- ML20077G010 + (12:11:55, 26 May 2025)
- 05000324/LER-1983-060-03, /03L-0:on 830706,HPCI Sys Outboard PCIV E41-F003 Automatically Closed Following Steam Leak Detection Ambient Temp High & HPCI Isolation/Trip Signal a Initiated Annunciations.Caused by Spurious Actuation + (12:12:20, 26 May 2025)
- 05000333/LER-1994-008-01, :on 941103,relay Room Vent Sys Isolation Valve Cable & Design Document Concerns.Caused by Inadequate Documentation & Implementation of Design Bases.Relay Room Ventilation Was Placed in Isolate Mode Operations + (12:12:24, 26 May 2025)
- 05000321/LER-1983-066-03, /03L-0:on 830629,indication Lights for 1E51-F004 & 1E51-F025 Found Not Lit & RCIC Trip & Throttle Valve Would Not Trip.Caused by Steam Leaks & Loose Bolts on Half Coupling.Repairs Made + (12:12:30, 26 May 2025)
- 05000255/LER-1983-046-03, /03L-0:on 830626,routine Sample of Sodium Hydroxide Tank T-103 Determined Concentration Below Tech Spec Limit.Cause Unknown.Possibility of Chemical Reaction within Tank Being Investigated + (12:12:32, 26 May 2025)
- 05000324/LER-1983-053-03, /03L-0:on 830628,performance of High Steam Line Radiation Channel Function Test PT-1.1.12PC Revealed Monitor 2-D12-LRM-K603D Actuating Above Specified Limit.Caused by Instrument Drift.Monitor Recalibr + (12:12:33, 26 May 2025)
- 05000325/LER-1994-014-01, :on 941101,Unit 1 Reactor Bldg Radioactive Effluent Sample Analysis Not Performed within TS Time Constraints.Caused by Personnel Error.Involved Personnel Have Been Reprimanded + (12:12:35, 26 May 2025)
- A820017, Forwards Rev 0 to Cooper Nuclear Station Semiannual Operating Rept - Radioactive Effluents,Jan-June 1982 + (12:12:42, 26 May 2025)
- ML20077F695 + (12:12:54, 26 May 2025)
- 05000416/LER-1983-073-03, /03L-0:on 830623,review Revealed That 30 Closure Times for Scram Discharge Vol Vent & Drain Valves Not Verified on 820901.Caused by License Restrictions.Change to Tech Specs for 4.0.4 Applicability Requested + (12:12:59, 26 May 2025)
- 05000346/LER-1994-005, :on 941103,RPS Channel 4 Response Times Exceeded.Caused by Incorrect Buffer Amplifier Module Ordered from Warehouse.Correct Buffer Amplifier Installed + (12:13:03, 26 May 2025)
- 05000389/LER-1983-031-03, /03L-0:on 830624,hot Shutdown Control Panel Steam Generator a Narrow Range Level Indication Failed. Caused by Failure of Level Transmitter.Transmitter Replaced + (12:13:07, 26 May 2025)
- 05000250/LER-1983-011-03, /03L-0:on 830624,malfunction of Fire Ionization Detector 3-10 Caused Inside Containment Fire Detection Zone 3 to Be Disabled for Longer than 14 Days.Root Cause Unknown. Repairs to Be Performed During Next Outage + (12:13:10, 26 May 2025)
- ML20077F590 + (12:13:12, 26 May 2025)
- ML20077F576 + (12:13:17, 26 May 2025)
- 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 + (12:13:18, 26 May 2025)
- 05000244/LER-1983-025-03, /03L-0:on 830620,small Leak Found in 3/8-inch Diameter Swag Lock Compression Fitting Connection Upstream of Pressurizer Liquid Sample Manual Isolation Valve V-956E. Caused by Thermal Stress + (12:13:20, 26 May 2025)
- 05000259/LER-1983-038-03, /03L-0:on 830627,trouble Alarm Came in for Control Bay Elevation 593 Fire Protection Panel 1-25-325,Zone 14,due to Power Loss to Some Smoke Detectors.Power Loss Caused by Loose Wire Connected to Detector XS-39-104BE + (12:13:22, 26 May 2025)
- 05000277/LER-1991-012-01, :on 910514,discovered That Primary Containment Isolation Valve on Units TIP Sys Purge Lines Not Being Leak Tested.Caused by Inadequate Review of TIP Sys Purge Piping. Procedure Revised to Allow Testing Downstream + (12:13:27, 26 May 2025)
- 05000254/LER-1991-012, :on 910507,HPCI Turbine Stop Valve Failed to Stroke Fully Open During Manual Initiation Test.Caused by Long Bushing in Stuffing Box of Stop Valve Sliding Down. Stuffing Boxes,Bushings & Pins Replaced + (12:13:28, 26 May 2025)
- 05000353/LER-1991-008-02, :on 910401,emergency Diesel Generator Declared Inoperable During Surveillance Test.Caused by Personnel Error.Procedures Revised to Provide Caution & Direction for Fuse Installation & Verification + (12:13:30, 26 May 2025)
- 05000277/LER-1991-015, :on 910515,reactor Bldg & Refueling Floor Ventilation Sys Tripped & Standby Gas Treatment Sys Initiated When Incorrect Fuse Pulled.Caused by Personnel Error.Fuses Will Be Labeled + (12:13:35, 26 May 2025)
- 05000277/LER-1991-014, :on 910521,isolation of HPCI Sys Occurred Unexpectedly During Surveillance Test.Caused by Leaking Isolation Valve,Resulting in Pressurization of Switch.Valve Replaced & Test Performed Satisfactorily + (12:13:37, 26 May 2025)
- 05000416/LER-1983-081-03, /03L-0:on 830627,control Room Fresh Air Unit a Declared Inoperable When Results of Lab Analysis of Carbon Sample Not Received within 31 Days.Caused by Delay of Shipment Sample Pending Vendor Approval + (12:13:38, 26 May 2025)
- 05000311/LER-1983-031-03, /03L-0:on 830623,spurious Safeguards Equipment Control Sys Actuation Deenergized Various Loads on Vital Bus 2A.Caused by Internal Circuitry Noise.Corrective Action to Be Taken When Investigation Completed + (12:13:39, 26 May 2025)
- 05000395/LER-1983-070-03, /03L-0:on 830629,pressurizer Relief Tank Level Indicator Removed from Svc Due to High Indication.Caused by Zero Shift on Transmitter.Transmitter Calibr + (12:13:41, 26 May 2025)
- 05000277/LER-1991-013-01, :on 910530,determined That Two Penetration Fire Seals Not Qualifiable Per 10CFR50,App R Due to Voids & Uncured Polyurethane Sealant Matl.Caused by Improper Seal Installation.Firewatches Initiated + (12:13:43, 26 May 2025)
- 05000277/LER-1990-004, :on 900321,determined That Under DBA Conditions Some ECCS & RCIC Sys Room Coolers Would Not Receive Min Acceptable Emergency Svc Water Flow.Caused by Buildup of Corrosion Products.Piping Inspected + (12:13:44, 26 May 2025)
- 05000302/LER-1983-024-03, /03L-0:on 830624,procedures Governing Lab Determination of Sodium Hydroxide Concentration Erroneously Equated 1.0 Mg Per Liter w/1.0 Ppm Causing Concentration Error.Caused by Procedure Inadequacy + (12:13:49, 26 May 2025)
- 05000261/LER-1983-013-03, /03L-0:on 830625,RCS Leak Rate Determined to Be 1.07 Gpm.Caused by Packing of Pressurizer Block Valve RC-536.Valve Will Be Repacked During Next Cold Shutdown + (12:13:51, 26 May 2025)