United States Nuclear Regulatory Commission - Protecting People and the Environment

Information Notices - 1991

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Document Number Title Revision Publish Date Reviewed Date
IN-91-87 Hydrogen Embrittlement of Raychem Cryofit Couplings -- 12/27/1991 --
IN-91-86 New Reporting Requirements for Contamination Events at Medical Facilities (10 CFR 30.50) -- 12/27/1991 --
IN-91-85 Potential Failures of Thermostatic Control Valves for Diesel Generator Jacket Cooling Water 1 02/27/1997 --
-- 12/26/1991 --
IN-91-84 Problems with Criticality Alarm Components/Systems -- 12/26/1991 --
IN-91-83 Solenoid-Operated Valve Failures Resulted in Turbine Overspeed -- 12/20/1991 --
IN-91-82 Problems with Diaphragms in Safety-Related Tanks -- 12/18/1991 --
IN-91-81 Switchyard Problems that Contribute to Loss of Offsite Power S1 05/19/1994 --
-- 12/16/1991 --
IN-91-80 Failure of Anchor Head Threads on Post-Tensioning System During Surveillance Inspection -- 12/11/1991 --
IN-91-79 Deficiencies in the Procedures for Installing Thermo-Lag Fire Barrier Materials S1 08/04/1994 --
-- 12/06/1991 --
IN-91-78 Status Indication of Control Power for Circuit Breakers Used in Safety-Related Applications -- 11/28/1991 --
IN-91-77 Shift Staffing at Nuclear Power Plants -- 11/26/1991 --
IN-91-76 10 CFR Parts 21 and 50.55(e) Final Rules -- 11/26/1991 --
IN-91-75 Static Head Corrections Mistakenly Not Included in Pressure Transmitter Calibration Procedures -- 11/25/1991 --
IN-91-74 Changes in Pressurizer Safety Valve Setpoints Before Installation -- 11/25/1991 --
IN-91-73 Loss of Shutdown Cooling During Disassembly of High Pressure Safety Injection System Check Valve -- 11/21/1991 --
IN-91-72 Issuance of a Revision to the EPA Manual of Protective Action Guides and Protective Actions for Nuclear Incidents -- 11/19/1991 --
IN-91-71 Training and Supervision of Individuals Supervised by an Authorized User -- 11/12/1991 --
IN-91-70 Improper Installation of Instrumentation Modules -- 11/04/1991 --
IN-91-69 Errors in Main Steam Line Break Analyses for Determining Containment Parameters -- 11/01/1991 --
IN-91-68 Careful Planning Significantly Reduces the Potential Adverse Impacts of Loss of Offsite Power Events During Shutdown -- 10/28/1991 --
IN-91-67 Problems with the Reliable Detection of Intergranular Attack (IGA) of Steam Generator Tubing -- 10/21/1991 --
IN-91-66 (1) Erroneous Data in ... NUREG/CR-0095 and (2) Thermal Scattering Data Limitation ... KENO and SCALE Codes -- 10/18/1991 --
IN-91-65 Emergency Access to Low-Level Radioactive Waste Disposal Facilities -- 10/16/1991 --
IN-91-64 Site Area Emergency Resulting from a Loss of Non-Class 1E Uninterruptable Power Supplies S1 10/07/1992 --
-- 10/09/1991 --
IN-91-63 Natural Gas Hazards at Fort St. Vrain Nuclear Generating Station -- 10/03/1991 --
IN-91-62 Diesel Engine Damage Caused by Hydraulic Lockup Resulting from Fluid Leakage into Cylinders -- 09/30/1991 --
IN-91-61 Preliminary Results of Validation Testing of Motor-Operated Valve Diagnostic Equipment -- 09/30/1991 --
IN-91-60 False Alarms of Alarm Ratemeters Because of Radiofrequency Interference -- 09/24/1991 --
IN-91-59 Problems with Access Authorization Programs -- 09/23/1991 --
IN-91-58 Dependency of Offset Disc Butterfly Valve's Operation on Orientation with Respect to Flow -- 09/20/1991 --
IN-91-57 Operational Experience on Bus Transfers -- 09/19/1991 --
IN-91-56 Potential Radioactive Leakage to Tank Vented to Atmosphere -- 09/19/1991 --
IN-91-55 Failures Caused by an Improperly Adjusted Test Link in 4.16 KV General Electric Switchgear -- 09/16/1991 --
IN-91-54 Foreign Experience Regarding Boron Dilution -- 09/06/1991 --
IN-91-53 Failure of Remote Shutdown System Instrumentation Because of Incorrectly Installed Components -- 09/04/1991 --
IN-91-52 Nonconservative Errors in Overtemperature Delta-Temperature (OTdT) Setpoint Caused by Improper Gain Setting S1 07/16/1992 --
-- 08/29/1991 --
IN-91-51 Inadequate Fuse Control Programs -- 08/20/1991 --
IN-91-50 A Review of Water Hammer Events After 1985 S1 07/17/1997 --
-- 08/20/1991 --
IN-91-49 Enforcement of Safety Requirements for Radiographers -- 08/15/1991 --
IN-91-48 False Certificates of Conformance Provided by Westinghouse Electric Supply Company for Commercial-Grade Circuit Breakers -- 08/09/1991 --
IN-91-47 Failure of Thermo-Lag Fire Barrier Material to Pass Fire Endurance Test -- 08/06/1991 --
IN-91-46 Degradation of Emergency Diesel Generator Fuel Oil Delivery Systems -- 07/18/1991 --
IN-91-45 Possible Malfunction of Westinghouse ARD, BFD, and NBFD Relays, and A200 DC and DPC 250 Magnetic Contactors S1 07/29/1994 --
-- 07/05/1991 --
IN-91-44 Improper Control of Chemicals in Nuclear Fuel Fabrication -- 07/08/1991 --
IN-91-43 Recent Incidents Involving Rapid Increases in Primary-to-Secondary Leak Rate -- 07/05/1991 --
IN-91-42 Plant Outage Events Involving Poor Coordination Between Operations and Maintenance Personnel During Valve Testing and Manipulations -- 06/27/1991 --
IN-91-41 Potential Problems with the Use of Freeze Seals -- 06/27/1991 --
IN-91-40 Contamination of Nonradioactive System and Resulting Possibility for Unmonitored, Uncontrolled Release to Environment -- 06/19/1991 --
IN-91-39 Compliance with 10 CFR Part 21, "Reporting of Defects and Noncompliance" -- 06/17/1991 --
IN-91-38 Thermal Stratification in Feedwater System Piping -- 06/13/1991 --
IN-91-37 Compressed Gas Cylinder Missile Hazards -- 06/10/1991 --
IN-91-36 Nuclear Plant Staff Working Hours -- 06/10/1991 --
IN-91-35 Labeling Requirements for Transporting Multi-Hazard Radioactive Materials -- 06/07/1991 --
IN-91-34 Potential Problems in Identifying Causes of Emergency Diesel Generator Malfunctions -- 06/03/1991 --
IN-91-33 Reactor Safety Information for States During Exercises and Emergencies -- 05/31/1991 --
IN-91-32 Possible Flaws in Certain Piping Systems Fabricated by Associated Piping and Engineering -- 05/15/1991 --
IN-91-31 Nonconforming Magnaflux Magnetic Particle (14AM) Prepared Bath -- 05/09/1991 --
IN-91-30 Inadequate Calibration of TLDs Utilized to Monitor Extremity Dose at Uranium Processing and Fabrication Facilities -- 04/23/1991 --
IN-91-29 Deficiencies Identified During Electrical Distribution System Functional Inspections S3 11/22/1995 --
S2 12/22/1993 --
S1 09/14/1992 --
-- 04/15/1991 --
IN-91-28 Cracking in Feedwater System Piping -- 04/15/1991 --
IN-91-27 Incorrect Rotation of Positive Displacement Pump -- 04/10/1991 --
IN-91-26 Potential Nonconservative Errors ... Working Format Hansen-Roach Cross-Section Set Provided with the KENO and SCALE Codes -- 04/02/1991 --
IN-91-25 Commercial-Grade Structural Framing Components Supplied as Nuclear Safety-Related Equipment -- 04/01/1991 --
IN-91-24 Recent Operating Experience Involving Reactor Operation Without a Licensed RO or SRO Present in the Control Room -- 03/26/1991 --
IN-91-23 Accidental Radiation Overexposures to Personnel Due to Industrial Radiography Accessory Equipment Malfunctions -- 03/26/1991 --
IN-91-22 Four Plant Outage Events Involving Loss of AC Power or Coolant Spills -- 03/19/1991 --
IN-91-21 Inadequate Quality Assurance Program of Vendor Supplying Safety-Related Equipment S1 12/07/1993 --
-- 03/19/1991 --
IN-91-21 Inadequate Quality Assurance Program of Vendor Supplying Safety-Related Equipment -- 03/19/1991 --
IN-91-21 Inadequate Quality Assurance Program of Vendor Supplying Safety-Related Equipment -- 03/19/1991 --
IN-91-20 Electrical Wire Insulation Degradation Caused Failure in a Safety-Related Motor Control Center -- 03/19/1991 --
IN-91-19 Steam Generator Feedwater Distribution Piping Damage -- 03/12/1991 --
IN-91-18 High-Energy Piping Failures Caused by Wall Thinning S1 12/18/1991 --
-- 03/12/1991 --
IN-91-17 Fire Safety of Temporary Installations or Services -- 03/11/1991 --
IN-91-16 Unmonitored Release Pathways from Slightly Contaminated Recycle and Recirculation Water Systems at a Fuel Facility -- 03/06/1991 --
IN-91-15 Incorrect Configuration of Breaker Operating Springs in General Electric AK-Series Metal-Clad Circuit Breakers -- 03/06/1991 --
IN-91-14 Recent Safety-Related Incidents at Large Irradiators -- 03/05/1991 --
IN-91-13 Inadequate Testing of Emergency Diesel Generators (EDGs) -- 03/04/1991 --
IN-91-12 Potential Loss of Net Positive Suction Head (NPSH) of Standby Liquid Control System Pumps -- 02/15/1991 --
IN-91-11 Inadequate Physical Separation and Electrical Isolation of Non-Safety-Related Circuits From RPS Circuits -- 02/20/1991 --
IN-91-10 Summary of Semiannual Program Performance Reports on Fitness-for-Duty (FFD) in the Nuclear Industry -- 02/12/1991 --
IN-91-09 Counterfeiting of Crane Valves 1 09/25/2007 --
-- 02/05/1991 --
IN-91-08 Medical Examination for Licensed Operators -- 02/05/1991 --
IN-91-07 Maintenance Deficiency Associated with General Electric Horizontal Custom 8000 Induction Motors -- 02/04/1991 --
IN-91-06 Lock-Up of Emergency Diesel Generator and Load Sequencer Control Circuits Preventing Restart of Tripped EDG -- 01/31/1991 --
IN-91-05 Intergranular Stress Corrosion Cracking in Pressurized Water Reactor Safety Injection Accumulator Nozzles -- 01/30/1991 --
IN-91-04 Reactor Scram Following Control Rod Withdrawal Associated with Low Power Turbine Testing -- 01/28/1991 --
IN-91-03 Management of Wastes Contaminated with Radioactive Materials ("Red Bag" Waste and Ordinary Trash) -- 01/07/1991 --
IN-91-02 Brachytherapy Source Management -- 01/07/1991 --
IN-91-01 Supplier of Misrepresented Resistors -- 01/04/1991 --
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