Information Notices - 1993
| File Name | Date | Description |
|---|---|---|
| in93100 | 12/22/1993 | Reporting Requirements for Bankruptcy |
| in93099 | 12/21/1993 | Undervoltage Relay and Thermal Overload Setpoint Problems |
| in93098 | 12/20/1993 | Motor Brakes on Valve Actuator Motors |
| in93097 | 12/17/1993 | Failures of Yokes Installed on Walworth Gate and Globe Valves |
| in93101 | 12/17/1993 | Jet Pump Hold-Down Beam Failure |
| in93096 | 12/14/1993 | Improper Reset Causes Emergency Diesel Generator Failures |
| in93095 | 12/13/1993 | Storm-Related Loss of Offsite Power Events Due to Salt Buildup on Switchyard Insulators |
| in93094 | 12/09/1993 | Unauthorized Forced Entry Into the Protected Area At Three Mile Island Unit 1 on February 7, 1993 |
| in93093 | 12/08/1993 | Inadequate Control of Reactor Coolant System Conditions During Shutdown |
| in93092 | 12/07/1993 | Plant Improvements to Mitigate Common Dependencies in Component Cooling Water Systems |
| in93091 | 12/03/1993 | Misadjustment Between General Electric 4.16-KV Circuit Breakers and Their Associated Cubicles |
| in93090 | 12/01/1993 | Unisolatable Reactor Coolant System Leak Following Repeated Applications of Leak Sealant |
| in93088 | 11/30/1993 | Status of Motor-Operated Valve Performance Prediction Program by the Electric Power Research Institute |
| in93089 | 11/26/1993 | Potential Problems With BWR Level Instrumentation Backfill Modifications |
| in93087 | 11/04/1993 | Fuse Problems With Westinghouse 7300 Printed Circuit Cards |
| in93086 | 10/29/1993 | Identification of Isotopes in the Production and Shipment of Byproduct Material at Non-Power Reactors |
| in93085r1 | 01/20/1994 | Problems With X-Relays in DB- and DHB-Type Circuit Breakers Manufactured By Westinghouse |
| in93085 | 10/20/1993 | Problems With X-Relays in DB- and DHB-Type Circuit Breakers Manufactured By Westinghouse |
| in93084 | 10/20/1993 | Determination of Westinghouse Reactor Coolant Pump Seal Failure |
| in93060s1 | 10/20/1994 | Reporting Fuel Cycle and Materials Events to the NRC Operations Center |
| in93081 | 10/12/1993 | Implementation of Engineering Expertise on Shift |
| in93082 | 10/12/1993 | Recent Fuel and Core Performance Problems in Operating Reactors |
| in93080 | 10/08/1993 | Implementation of the Revised 10 CFR Part 20 |
| in93083 | 10/07/1993 | Potential Loss of Spent Fuel Pool Cooling Following a Loss of Coolant Accident (LOCA) |
| in93077 | 10/04/1993 | Human Errors That Result in Inadvertent Transfers of Special Nuclear Material at Fuel Cycle Facilities |
| in93078 | 10/04/1993 | Inoperable Safety Systems at a Non-Power Reactor |
| in93079 | 09/30/1993 | Core Shroud Cracking at Beltline Region Welds in Boiling-Water Reactors |
| in93076 | 09/21/1993 | Inadequate Control of Paint and Cleaners For Safety-Related Equipment |
| in93075 | 09/17/1993 | Spurious Tripping of Low-Voltage Power Circuit Breakers With GE RMS-9 Digital Trip Units |
| in93074 | 09/16/1993 | High Temperatures Reduce Limitorque AC Motor Operator Torque |
| in93073 | 09/15/1993 | Criminal Prosecution of Nuclear Suppliers For Wrongdoing |
| in93072 | 09/14/1993 | Observations From Recent Shutdown Risk and Outage Management Pilot Team Inspections |
| in93071 | 09/13/1993 | Fire At Chernobyl Unit 2 |
| in93070 | 09/10/1993 | Degradation of Boraflex Neutron Absorber Coupons |
| in93069 | 09/02/1993 | Radiographic Events At Operating Power Reactors |
| in93068 | 09/01/1993 | Failure of Pump Shaft Coupling Caused By Temper Embrittlement During Manufacture |
| in93083s1 | 08/24/1995 | Potential Loss of Spent Fuel Pool Cooling Following a Loss of Coolant Accident |
| in93067 | 08/16/1993 | Bursting of High Pressure Coolant Injection Steam Line Rupture Discs Injures Plant Personnel |
| in93066 | 08/16/1993 | Switchover to Hot-Leg Injection Following a Loss-Of-Coolant Accident in Pressurized Water Reactors |
| in93065 | 08/13/1993 | Reactor Trips Caused By Breaker Testing With Fault Protection Bypassed |
| in93064 | 08/12/1993 | Periodic Testing and Preventative Maintenance of Molded Case Circuit Breakers |
| in93063 | 08/11/1993 | Improper Use of Soluble Weld Purge Dam Material |
| in93062 | 08/10/1993 | Thermal Stratification of Water in BWR Reactor Vessels |
| in93061 | 08/09/1993 | Excessive Reactor Coolant Leakage Following a Seal Failure in a Reactor Coolant Pump or Reactor Recirculation Pump |
| in93060 | 08/04/1993 | Reporting Fuel Cycle and Materials Events to the NRC Operations Center |
| in93059 | 07/26/1993 | Unexpected Opening of Both Doors in an Airlock |
| in93058 | 07/26/1993 | Nonconservatism in Low-Temperature Overpressure Protection For Pressurized-Water Reactors |
| in93057 | 07/23/1993 | Software Problems Involving Digital Control Console Systems at Non-Nuclear Reactors |
| in93056 | 07/22/1993 | Weakness in Emergency Operating Procedures Found as Result of Steam Generator Tube Rupture |
| in93055 | 07/21/1993 | Potential Problem With Main Steamline Break Analysis for Main Steam Vaults/Tunnels |
| in93054 | 07/20/1993 | Motor-Operated Valve Actuator Thrust Variations Measured With a Torque Thrust Cell and a Strain Gage |
| in93053 | 07/20/1993 | Effect of Hurricane Andrew on Turkey Point Nuclear Generating Station and Lessons Learned |
| in93052 | 07/14/1993 | Draft NUREG-1477, "Voltage-Based Interim Plugging Criteria For Steam Generator Tubes" |
| in93051 | 07/09/1993 | Repetitive Overspeed Tripping of Turbine-Driven Auxiliary Feedwater Pumps |
| in93050 | 07/08/1993 | Extended Storage of Sealed Sources |
| in93049 | 07/08/1993 | Improper Integration of Software Into Operating Practices |
| in93048 | 07/06/1993 | Failure of Turbine-Driven Main Feedwater Pump To Trip Because of Contaminated Oil |
| in93047 | 06/18/1993 | Unrecognized Loss of Control Room Annunciators |
| in93045 | 06/16/1993 | Degradation of Shutdown Cooling System Performance |
| in93044 | 06/15/1993 | Operational Challenges During a Dual-Unit Transient |
| in93046 | 06/10/1993 | Potential Problem With Westinghouse Rod Control System & Inadvertent Withdrawal of a Single Rod Control Cluster Assembly |
| in93043 | 06/10/1993 | Use of Inappropriate Lubrication Oils in Safety-Related Applications |
| in93042 | 06/09/1993 | Failure of Anti-Rotation Keys in Motor-Operated Valves Manufactured by Velan |
| in93041 | 05/28/1993 | One Hour Fire Endurance Test Results For ... Kaowool, ... FS-195, and ... Interam E-50 Fire Fire Barrier Systems |
| in93040 | 05/26/1993 | Fire Endurance Test Results for Thermal Ceramics FP-60 Fire Barrier Material |
| in93039 | 05/25/1993 | Radiation Beams From Power Reactor Biological Shields |
| in93038 | 05/24/1993 | Inadequate Testing of Engineered Safety Features Actuation Systems |
| in93037 | 05/19/1993 | Eyebolts With Indeterminate Properties Installed in Limitorque Valve Operator Housing Covers |
| in93036 | 05/07/1993 | Notifications, Reports, and Records of Misadministrations |
| in93035 | 05/12/1993 | Insights From Common-Cause Failure Events |
| in93034s1 | 05/06/1993 | Potential for Loss of Emergency Cooling Function Due to a Combination of Operational and Post-LOCA Debris in Containment |
| in93053s1 | 04/29/1994 | Effect of Hurricane Andrew on Turkey Point Nuclear Generating Station and Lessons Learned |
| in93033 | 04/28/1993 | Potential Deficiency of Certain Class 1E Instrumentation and Control Cables |
| in93034 | 04/26/1993 | Potential For Loss of Emergency Cooling Function Due to a Combination of Operational and Post-LOCA Debris in Containment |
| in93032 | 04/21/1993 | Nonconservative Inputs for Boron Dilution Event Analysis |
| in93031 | 04/13/1993 | Training of Nurses Responsible for the Care of Patients With Brachytherapy Implants |
| in93030 | 04/12/1993 | NRC Requirements for Evaluation of Wipe Test Results; Calibration of Count Rate Survey Instruments |
| in93029 | 04/12/1993 | Problems With the Use of Unshielded Test Leads in Reactor Protection System Circuitry |
| in93028 | 04/09/1993 | Failure to Consider Loss of DC Bus in the Emergency Core Cooling System Evaluation May Lead to Nonconservative Analysis |
| in93027 | 04/08/1993 | Level Instrumentation Inaccuracies Observed During Normal Plant Depressurization |
| in93026 | 04/07/1993 | Grease Solidification Causes Molded Case Circuit Breaker Failure to Close |
| in93025 | 04/01/1993 | Electrical Penetration Assembly Degradation |
| in93023 | 03/31/1993 | Weschler Instruments Model 252 Switchboard Meters |
| in93024 | 03/31/1993 | Distribution of Revision 7 of NUREG-1021, "Operator Licensing Examiner Standards" |
| in93022 | 03/26/1993 | Tripping of Klockner-Moeller Molded-Case Circuit Breakers Due to Support Lever Failure |
| in93021 | 03/25/1993 | Summary of ... Observations Compiled During Engineering Audits or Inspections of Licensee Erosion/Corrosion Programs |
| in93017r1 | 03/25/1994 | Safety Systems Response to Loss of Coolant and Loss of Offsite Power |
| in93020 | 03/24/1993 | Thermal Fatigue Cracking of Feedwater Piping to Steam Generators |
| in93019 | 03/17/1993 | Slab Hopper Bulging |
| in93018 | 03/10/1993 | Portable Moisture-Density Gauge User Responsibilities During Field Operations |
| in93017 | 03/08/1993 | Safety Systems Response to Loss of Coolant and Loss of Offsite Power |
| in93016 | 02/19/1993 | Failures of Nut-Locking Devices in Check Valves |
| in93014 | 02/18/1993 | Clarification of 10 CFR 40.22, Small Quantities of Source Material |
| in93015 | 02/18/1993 | Failure to Verify the Continuity of Shunt Trip Attachment Contacts in Manual Safety Injection and Reactor Trip Switches |
| in93013 | 02/16/1993 | Undetected Modification of Flow Characteristics in the High Pressure Safety Injection System |
| in93012 | 02/11/1993 | Off-Gassing in Auxiliary Feedwater System Raw Water Sources |
| in93011 | 02/04/1993 | Single Failure Vulnerability of Engineered Safety Features Actuation Systems |
| in93010 | 02/02/1993 | Dose Calibrator Quality Control |
| in93009 | 02/02/1993 | Failure of Undervoltage Trip Attachment on Westinghouse Model DB-50 Reactor Trip Breaker |
| in93008 | 02/01/1993 | Failure of Residual Heat Removal Pump Bearings Due to High Thrust Loading |
| in93007 | 02/01/1993 | Classification of Transportation Emergencies |
| in93026s1 | 01/31/1994 | Grease Solidification Causes Molded-Case Circuit Breaker Failure to Close |
| in93006 | 01/22/1993 | Potential Bypass Leakage Paths Around Filters Installed in Ventilation Systems |
| in93005 | 01/14/1993 | Locking of Radiography Exposure Devices |
| in93004 | 01/07/1993 | Investigation and Reporting of Misadministrations by the Radiation Safety Officer |
| in93003 | 01/05/1993 | Recent Revisions to 10 CFR Part 20 and Change of Implementation Date to January 1, 1994 |
| in93002 | 01/04/1993 | Malfunction of a Pressurizer Code Safety Valve |
| in93001 | 01/04/1993 | Accuracy of Motor-Operated Valve Diagnostic Equipment Manufactured by Liberty Technologies |
Page Last Reviewed/Updated Thursday, March 29, 2012
