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Category:NRC Information Notice
MONTHYEARML19196A2452019-07-15015 July 2019 Public Notice - Sequoyah Nuclear Plant, Unit 2 - Exigent Amendment to Facility Operating License Information Notice 2019-01, Inadequate Evaluation of Temporary Alterations2019-03-12012 March 2019 Inadequate Evaluation of Temporary Alterations Information Notice 2012-11, Age Related Capacitor Degradation2012-07-23023 July 2012 Age Related Capacitor Degradation Information Notice 2003-02, Recent Experience with Reactor Coolant System Leakage & Boric Acid Corrosion2003-01-16016 January 2003 Recent Experience with Reactor Coolant System Leakage & Boric Acid Corrosion Information Notice 2002-22, Degraded Bearing Surfaces in Gm/Emd Emergency Diesel Generators2002-06-28028 June 2002 Degraded Bearing Surfaces in Gm/Emd Emergency Diesel Generators Information Notice 1999-28, Recall of Star Brand Fire Protection Sprinkler Heads1999-09-30030 September 1999 Recall of Star Brand Fire Protection Sprinkler Heads Information Notice 1999-27, Malfunction of Source Retraction Mechanism in Cobalt-60 Teletherapy Treatment Units1999-09-0202 September 1999 Malfunction of Source Retraction Mechanism in Cobalt-60 Teletherapy Treatment Units Information Notice 1999-26, Safety and Economic Consequences of Misleading Marketing Information1999-08-24024 August 1999 Safety and Economic Consequences of Misleading Marketing Information Information Notice 1999-25, Year 2000 Contingency Planning Activities1999-08-10010 August 1999 Year 2000 Contingency Planning Activities Information Notice 1999-24, Broad-Scope Licensees' Responsibilities for Reviewing and Approving Unregistered Sealed Sources and Devices1999-07-12012 July 1999 Broad-Scope Licensees' Responsibilities for Reviewing and Approving Unregistered Sealed Sources and Devices Information Notice 1999-23, Safety Concerns Related to Repeated Control Unit Failures of the Nucletron Classic Model High-Dose-Rate Remote Afterloading Brachytherapy Devices1999-07-0606 July 1999 Safety Concerns Related to Repeated Control Unit Failures of the Nucletron Classic Model High-Dose-Rate Remote Afterloading Brachytherapy Devices Information Notice 1999-20, Contingency Planning for the Year 2000 Computer Problem1999-06-25025 June 1999 Contingency Planning for the Year 2000 Computer Problem Information Notice 1999-21, Recent Plant Events Caused by Human Performance Errors1999-06-25025 June 1999 Recent Plant Events Caused by Human Performance Errors Information Notice 1999-22, 10CFR 34.43(a)(1); Effective Date for Radiographer Certification and Plans for Enforcement Discretion1999-06-25025 June 1999 10CFR 34.43(a)(1); Effective Date for Radiographer Certification and Plans for Enforcement Discretion Information Notice 1999-19, Rupture of the Shell Side of a Feedwater Heater at the Point Beach Nuclear Plant1999-06-23023 June 1999 Rupture of the Shell Side of a Feedwater Heater at the Point Beach Nuclear Plant Information Notice 1999-18, Update on Nrc'S Year 2000 Activities for Material Licensees and Fuel Cycle Licensees and Certificate Holders1999-06-14014 June 1999 Update on Nrc'S Year 2000 Activities for Material Licensees and Fuel Cycle Licensees and Certificate Holders Information Notice 1999-17, Problems Associated with Post-Fire Safe-Shutdown Circuit Analyses1999-06-0303 June 1999 Problems Associated with Post-Fire Safe-Shutdown Circuit Analyses Information Notice 1999-16, Federal Bureau of Investigation'S Nuclear Site Security Program1999-05-28028 May 1999 Federal Bureau of Investigation'S Nuclear Site Security Program Information Notice 1999-15, Misapplication for 10CFR Part 71 Transportation Shipping Cask Licensing Basis to 10CFR Part 50 Design Basis1999-05-27027 May 1999 Misapplication for 10CFR Part 71 Transportation Shipping Cask Licensing Basis to 10CFR Part 50 Design Basis Information Notice 1999-14, Unanticipated Reactor Water Draindown at Quad Cities Unit 2, Arkansas Nuclear One Unit 2, & FitzPatrick1999-05-0505 May 1999 Unanticipated Reactor Water Draindown at Quad Cities Unit 2, Arkansas Nuclear One Unit 2, & FitzPatrick Information Notice 1999-13, Insights from NRC Inspections of Low-and Medium-Voltage Circuit Breaker Maintenance Programs1999-04-29029 April 1999 Insights from NRC Inspections of Low-and Medium-Voltage Circuit Breaker Maintenance Programs Information Notice 1999-12, Year 2000 Computer Systems Readiness Audits1999-04-28028 April 1999 Year 2000 Computer Systems Readiness Audits Information Notice 1999-11, Incidents Involving the Use of Radioactive Iodine-1311999-04-16016 April 1999 Incidents Involving the Use of Radioactive Iodine-131 Information Notice 1999-08, Urine Specimen Adulteration1999-03-26026 March 1999 Urine Specimen Adulteration Information Notice 1999-09, Problems Encountered When Manually Editing Treatment Data on the Nucletron Microselectron-HDR (New) Model 105-9991999-03-24024 March 1999 Problems Encountered When Manually Editing Treatment Data on the Nucletron Microselectron-HDR (New) Model 105-999 Information Notice 1999-07, Failed Fire Protection Deluge Valves & Potential Testing Deficiencies in Preaction Sprinkler Systems1999-03-22022 March 1999 Failed Fire Protection Deluge Valves & Potential Testing Deficiencies in Preaction Sprinkler Systems Information Notice 1999-06, 1998 Enforcement Sanctions as a Result of Deliberate Violations of NRC Employee Protection Requirements1999-03-19019 March 1999 1998 Enforcement Sanctions as a Result of Deliberate Violations of NRC Employee Protection Requirements Information Notice 1999-06, 1998 Enforcement Sanctions As a Result of Deliberate Violations of NRC Employee Protection Requirements1999-03-19019 March 1999 1998 Enforcement Sanctions As a Result of Deliberate Violations of NRC Employee Protection Requirements Information Notice 1999-05, Inadvertent Discharge of Carbon Dioxide Fire Protection System and Gas Migration1999-03-0808 March 1999 Inadvertent Discharge of Carbon Dioxide Fire Protection System and Gas Migration Information Notice 1999-04, Unplanned Radiation Exposures to Radiographers, Resulting from Failures to Follow Proper Radiation Safety Procedures1999-03-0101 March 1999 Unplanned Radiation Exposures to Radiographers, Resulting from Failures to Follow Proper Radiation Safety Procedures Information Notice 1999-03, Exothermic Reactors Involving Dried Uranium Oxide Powder (Yellowcake)1999-01-29029 January 1999 Exothermic Reactors Involving Dried Uranium Oxide Powder (Yellowcake) Information Notice 1999-02, Guidance to Users on the Implementation of a New Single-Source Dose-Calculation Formalism and Revised Air-Kerma Strength Standard for Iodine-125 Sealed Sources1999-01-21021 January 1999 Guidance to Users on the Implementation of a New Single-Source Dose-Calculation Formalism and Revised Air-Kerma Strength Standard for Iodine-125 Sealed Sources Information Notice 1999-01, Deterioration of High-Efficiency Particulate Air Filters in a Pressurized Water Reactor Containment Fan Cooler Unit1999-01-20020 January 1999 Deterioration of High-Efficiency Particulate Air Filters in a Pressurized Water Reactor Containment Fan Cooler Unit Information Notice 1998-45, Cavitation Erosion of Letdown Line Orifices Resulting in Fatigue Cracking of Pipe Welds1998-12-15015 December 1998 Cavitation Erosion of Letdown Line Orifices Resulting in Fatigue Cracking of Pipe Welds Information Notice 1998-44, Ten-Year Inservice Inspection (ISI) Program Update for Licensees That Intend to Implement Risk-Informed ISI of Piping1998-12-10010 December 1998 Ten-Year Inservice Inspection (ISI) Program Update for Licensees That Intend to Implement Risk-Informed ISI of Piping Information Notice 1998-43, Leaks in Emergency Diesel Generator Lubricating Oil & Jacket Cooling Water Piping1998-12-0404 December 1998 Leaks in Emergency Diesel Generator Lubricating Oil & Jacket Cooling Water Piping Information Notice 1998-42, Implementation of 10 CFR 55.55a(g) Inservice Inspection Requirements1998-12-0101 December 1998 Implementation of 10 CFR 55.55a(g) Inservice Inspection Requirements Information Notice 1998-41, Spurious Shutdown of Emergency Diesel Generators from Design Oversight1998-11-20020 November 1998 Spurious Shutdown of Emergency Diesel Generators from Design Oversight Information Notice 1998-41, Spurious Shutdown of Emergency Diesel Generators From Design Oversight1998-11-20020 November 1998 Spurious Shutdown of Emergency Diesel Generators From Design Oversight Information Notice 1998-39, Summary of Fitness-for-Duty Program Performance Reports for Calendar Years 1996 and 19971998-10-30030 October 1998 Summary of Fitness-for-Duty Program Performance Reports for Calendar Years 1996 and 1997 Information Notice 1998-40, Design Deficiencies Can Lead to Reduced ECCS Pump Net Positive Suction Head During Design-Basis Accidents1998-10-26026 October 1998 Design Deficiencies Can Lead to Reduced ECCS Pump Net Positive Suction Head During Design-Basis Accidents Information Notice 1990-66, Incomplete Draining and Drying of Shipping Casks1998-10-25025 October 1998 Incomplete Draining and Drying of Shipping Casks Information Notice 1998-38, Metal-Clad Circuit Breaker Maintenance Issues Identified by NRC Inspections1998-10-15015 October 1998 Metal-Clad Circuit Breaker Maintenance Issues Identified by NRC Inspections Information Notice 1998-37, Eligibility of Operator License Applicants1998-10-0101 October 1998 Eligibility of Operator License Applicants Information Notice 1998-36, Inadequate or Poorly Controlled, Non-Safety-Related Maintenance Activities Unnecessarily Challenged Safety Systems1998-09-18018 September 1998 Inadequate or Poorly Controlled, Non-Safety-Related Maintenance Activities Unnecessarily Challenged Safety Systems Information Notice 1998-33, NRC Regulations Prohibit Agreements That Restrict or Discourage an Employee from Participating in Protected Activities1998-08-28028 August 1998 NRC Regulations Prohibit Agreements That Restrict or Discourage an Employee from Participating in Protected Activities Information Notice 1998-34, Configuration Control Errors1998-08-28028 August 1998 Configuration Control Errors Information Notice 1998-31, Fire Protection System Design Deficiencies and Common-Mode Flooding of Emergency Core Cooling System Rooms at Washington Nuclear Project Unit 21998-08-18018 August 1998 Fire Protection System Design Deficiencies and Common-Mode Flooding of Emergency Core Cooling System Rooms at Washington Nuclear Project Unit 2 Information Notice 1998-30, Effect of Year 2000 Computer Problem on NRC Licensees and Certificate Holders1998-08-12012 August 1998 Effect of Year 2000 Computer Problem on NRC Licensees and Certificate Holders Information Notice 1998-29, Predicted Increase in Fuel Rod Cladding Oxidation1998-08-0303 August 1998 Predicted Increase in Fuel Rod Cladding Oxidation 2019-07-15
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UNITED STATES NUCLEAR REGULATORY COMMISSION
OFFICE OF NUCLEAR REACTOR REGULATION
WASHINGTON, DC 20555 June 28, 2002 NRC INFORMATION NOTICE 2002-22: DEGRADED BEARING SURFACES IN GM/EMD
EMERGENCY DIESEL GENERATORS
Addressees
All holders of operating licenses for pressurized- or boiling-water nuclear power reactors, including those that have ceased operations but have fuel on site.
Purpose
The U.S. Nuclear Regulatory Commission (NRC) is issuing this information notice to inform
addressees of the discovery of degraded bearing surfaces on the piston bearings in General
Motors/Electromotive Division (GM/EMD) emergency diesel generator (EDG) engines. It is
expected that recipients will review the information for applicability to their facilities and consider
actions, as appropriate, to avoid similar problems. However, suggestions contained in this
information notice are not NRC requirements; therefore, no specific action or written response
is required.
Description of Circumstances
Surry Power Station, Units 1 and 2
On April 23, 2001, with both units at full power, emergency diesel generator 3 (EDG 3) was
taken out of service to investigate an increase in the silver concentration in samples of EDG
lubricating oil. The piston wristpin bearing inserts in GM/EMD diesel engines have a silver
substrate beneath a lead-tin overlay. An increasing concentration of silver in the lube oil is an
indicator of excessive wear of the bearing surfaces.
The engine manufacturer has provided detailed instructions on interpreting the results of lube
oil sample analysis. Silver concentrations in the range 0 to 1 parts per million (ppm) are
considered normal. The range 1 to 2 ppm is considered borderline, and concentrations above 2 ppm indicate a high correct condition. The manufacturer specifies several inspections, including feeling the side of piston pins in situ for signs of distress and measuring the piston-to- head clearance for the high-correct condition.
The silver content of the lube oil samples from Surry EDG 3 gradually rose from 0.63 ppm in
April 2000 to more than 2 ppm in October, but the licensee did not notice this trend because the
action level in the licensees sampling procedure was too high. In April 2001, there were
indications of abnormal wear on the wrist pin sides. Examination revealed severe damage on
the surfaces of seven of the wristpin bearings and piston carrier bearings. The silver had been
displaced from the wristpin bearing surfaces to the carrier bearing surfaces, blocking some or
all of the lubricating oil channels. The partially blocked oil channels prevented normal oil flow at
the bearing-to-wristpin interface, resulting in higher oil and bearing temperatures and wear and
extrusion of the bearing surfaces. There was base-metal-to-base-metal contact, which can
lead to catastrophic bearing failure and engine damage. Surveillance testing required by
technical specifications failed to detect the damage in the engine.
Based on the as-found condition of EDG 3, the licensee concluded that this engine was
inoperable. All 20 power-pack assemblies (cylinder, cylinder head, piston and connecting rod)
were replaced and the EDG was returned to service.
The silver concentration in the oil samples from Surry EDG 1 was also higher than historical
values but was in the 1-to-1.2 ppm range when the engine was removed from service in July
2001. Inspecting the removed power-pack assemblies, the licensee found that cylinder #8 had
a severely damaged piston wristpin bearing and a piston carrier bearing all of whose oil
channels were blocked. Seven other cylinders had partially blocked bearing oil channels. All
20 power-pack assemblies were replaced and the EDG was returned to service.
Sequoyah Nuclear Plant
In June 2001, the licensee tested an oil sample from Sequoyah EDG 2B-B and found an
increase in silver content to 1.1 ppm, indicating a borderline condition. Two months later, the
wristpin and piston carrier bearings of cylinder #11 were found to be severely degraded. The
bearing material had been worn away, oil channels were blocked, the wristpin was burned and
heavily scored, and parts of the wristpin and carrier were blued from heat. From a record
review, the cylinder #11 measured piston-to-head clearance in March 2001 had exceeded the
acceptance criteria of 0.068 inches by 0.001 inches and was significantly changed, 0.027 inches, from the previous measurement in 1999. The vendor recommends that the associated
power pack be condemned when a change of 0.030 inches is observed.
In September 2001 the licensee investigated a slightly elevated silver content in EDG 1A-A.
Performance of in-situ feel checks, visual inspections and piston-to-head clearance
measurements were unable to locate the cause of the elevated silver. Visual examination of
the disassembled power packs found damage in cylinder #1 similar to that in EDG 2B-B
cylinder #11. Technical specification required testing did not disclose the damage in either
EDG 1A-A or 2B-B.
Arkansas Nuclear One (ANO)
In January 1986, damage similar to that at Sequoyah and Surry was observed in EDG 1A at
ANO. The wristpins and connecting rod bearing inserts of four cylinders were heavily scored
and burned. At that time, lube oil analysis was not done on a regular schedule. The lube oil
analysis after the discovery of the damage showed a silver content of 9.2 ppm; the action level
was 2.0 ppm. Piston-to-cylinder-head clearances in all four cylinders were found to be greater
than the 0.03 inches permitted by the manufacturer. The licensee attributed the wristpin
bearing failures to insufficient lube oil film but could not identify the mechanism. The licensee
determined that frequent visual inspections of the wristpin bearings and frequent
measurements of piston-to-cylinder-head clearance should be made. The licensee also began
monitoring and trending lube oil samples. Discussion
As a result of finding damaged bearings in their GM/EMD diesel generator engines, the three
licensees performed technical assessments and root cause analyses. The Surry licensee
contracted several technical organizations to perform independent assessments for this
purpose (see the reference at the end of this notice).
The licensees generally agreed about the failure mechanism and the probable root causes.
The damage to the wristpin was consistent with a lubrication-deprived failure. Wear and
extrusion of the softer silver substrate material is the result of insufficient lubrication or use of a
lubricant with insufficient film strength to remain on the bearings between engine starts. The
problem is possibly aggravated by oil chemistry.
The failure is initiated by repeated engine starts under marginal lubrication conditions. The
silver-and-lead bearing material is displaced into the oil channels of the wristpin bearing, limiting
or preventing lubricant flow across the full surface of the bearing. When the channels are
substantially or completely blocked, the bearing material wears away until the steel wristpin
contacts the steel bearing shell and the bearing fails. Initially, the damage occurs only while the
engine is starting, i.e., until the lubricating system supplies oil to the bearing. However, after
the oil channels are substantially blocked, the bearing is lubrication-deprived and damage can
continue and potentially accelerate while the engine is operating.
From the information provided by the Surry licensee (see reference), the change to
nonchlorinated oils appears to be the root cause of their bearing failures. Chlorine compounds
previously were added specifically to impart extra extreme pressure (EP) resistance to the
base lube oil. This EP resistance property provides oil adherence to the bearings when the
engine is not run for an extended period, thereby preserving some lubrication for the next start.
However, these chlorine compound additives were determined to be carcinogenic and posed
disposal problems. Therefore, licensees had changed to a non-chlorinated formulation.
Feedback obtained by the licensee from additive formulation experts in the oil industry and from
bearing manufacturers confirms that the chlorinated additive in the earlier lube oil was a paraffin
wax and was there as an extreme-pressure lubricant.
Although the licensee changed to an oil that met the engine vendors specifications, the
nonchlorinated formulation apparently had not been specifically qualified for the standby duty
typically required of diesel engines provided for nuclear power plants. Such oils have been
used successfully in locomotive and marine applications in which engines operate continuously
for long periods, and shutdowns are infrequent and of relatively short duration.
The problems at Surry, Sequoyah and ANO indicate that the recommended limits for silver in
the lube oil need to be reexamined. The current 2 ppm limit at which specific actions are
required may not be an appropriate limit for the more stringent demands on the lube oil during
extended standby duty. The limit is based upon uniform wear from all cylinders and not for the
detection of abnormal degradation on single or a few bearings. It may also be prudent to do
more frequent oil analyses and more frequent visual inspections of the relevant engine parts at
lower or at step changes in, silver concentrations. Furthermore, with elevated silver
concentrations, successful completion of surveillance tests feel checks, and piston-to-head
clearance measurements may not be sufficient to confirm that the piston wristpin and piston
carrier bearing are free of severe damage. Although not observed at these three plants, degraded turbocharger bearings can also result in elevated silver concentrations. This information notice requires no specific action or written response. If you have any
questions about the information in this notice, please contact one of the technical contacts
listed below or the appropriate Office of Nuclear Reactor Regulation (NRR) project manager.
/RA/
William D. Beckner, Program Director
Operating Reactor Improvements Program
Division of Regulatory Improvement Programs
Office of Nuclear Reactor Regulation
Technical Contacts: Jai R. Rajan, NRR Kerry D. Landis, RII
301-415-3066 404-562-4510
Email: jrr@nrc.gov Email: kdl@nrc.gov
Paul E. Fredrickson, RII Linda Smith, RIV
404-562-4530 817-860-8137 Email: pef@nrc.gov Email: ljs@nrc.gov
Reference: Letter dated December 12, 2001, from Virginia Electric and Power Company to the
NRC, transmitting technical reports on the root cause of the wristpin damage in the Surry Power
Station emergency diesel generators (Accession Nos. ML 0136001720 [Part I] and
ML 0136002070 [Part II])
Attachment: List of Recently Issued NRC Information Notices
ML021790640
DOCUMENT NAME: G:\REXB\RAB1\IN-EDG4.WPD *See previous concurrence
OFFICE RSE:RORP:DRIP Tech Editor R-II R-II
NAME CDPetrone PKleene* Pfredrickson *e-mail KLandis *email
DATE 06/12/2002 04/04/2002 06/12/2002 06/12/2002 OFFICE R-IV BC:EMEB:DE SC:OES:RORP:DRIP PD:ROR:DRIP
NAME Lsmith *email GImbro TReis WDBeckner
DATE 06/12/2002 06/25/2002 06/27/2002 06/28/2002
Attachment 1 LIST OF RECENTLY ISSUED
NRC INFORMATION NOTICES
_____________________________________________________________________________________
Information Date of
Notice No. Subject Issuance Issued to
_____________________________________________________________________________________
2002-21 Axial Outside-Diameter 06/25/2002 All holders of operating licenses
Cracking Affecting Thermally for pressurized-water reactors
Treated Alloy 600 Steam (PWRs), except those who have
Generator Tubing permanently ceased operations
and have certified that fuel has
been permanently removed from
the reactor.
2002-19 Medical Misadministrations 06/14/2002 All nuclear pharmacies and
Caused By Failure to Properly medical licensees.
Perform Tests on Dose
Calibrators for Beta-and Low- Energy Photon-Emitting
Radionuclides
2002-18 Effect of Adding Gas Into 06/06/2002 All holders of operating licenses
Water Storage Tanks on the for nuclear power reactors, Net Positive Suction Head For except those who have
Pumps permanently ceased operations
and have certified that fuel has
been permanently removed from
the reactor.
2002-17 Medical Use of Strontium-90 05/30/2002 All U.S. Nuclear Regulatory
Eye Applicators: New Commission medical licensees
Requirements for Calibration that use strontium-90 (Sr-90) eye
and Decay Correction applicators.
2002-16 Intravascular Brachytherapy 05/01/2002 All Medical Licensees.
Misadministrations
Note: NRC generic communications may be received in electronic format shortly after they are
issued by subscribing to the NRC listserver as follows:
To subscribe send an e-mail to <listproc@nrc.gov >, no subject, and the following
command in the message portion:
subscribe gc-nrr firstname lastname
______________________________________________________________________________________
OL = Operating License
CP = Construction Permit
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list | - Information Notice 2002-01, Metal Clad Switchgear Failures and Consequent Losses of Offsite Power (8 January 2002, Topic: Emergency Lighting)
- Information Notice 2002-02, Recent Experience with Plugged Steam Generator Tubes (17 July 2002)
- Information Notice 2002-03, Highly Radioactive Particle Control Problems During Spent Fuel Pool Cleanout (10 January 2002, Topic: Significance Determination Process)
- Information Notice 2002-04, Wire Degradation at Breaker Cubicle Door Hinges (10 January 2002)
- Information Notice 2002-06, Design Vulnerability in BWR Reactor Vessel Level Instrumentation Backfill Modification (18 January 2002, Topic: Reactor Vessel Water Level)
- Information Notice 2002-07, Use of Sodium Hypochlorite for Cleaning Diesel Fuel Oil Supply Tanks (28 January 2002)
- Information Notice 2002-09, Potential for Top Nozzle Separation and Dropping of a Certain Type of Westinghouse Fuel Assembly (13 February 2002)
- Information Notice 2002-10, Manual Reactor Trip and Steam Generator Water Level Setpoint Uncertainties (28 June 2002, Topic: Safe Shutdown, Unanalyzed Condition)
- Information Notice 2002-11, Recent Experience with Degradation of Reactor Pressure Vessel Head (12 March 2002, Topic: Boric Acid, Pressure Boundary Leakage)
- Information Notice 2002-12, Submerged Safety-Related Electrical Cables (21 March 2002)
- Information Notice 2002-13, E-mail from H. Nieh, Oedo to A. Levin, Ocm, Et Al., Issuance of Information Notice 2002-13, Fwd: E-mail from D. Pickett T Davis-Besse Communication Plan (4 April 2002, Topic: Boric Acid)
- Information Notice 2002-14, Ensuring a Capability to Evacuate Individuals, Including Members of the Public, from the Owner-Controlled Area (8 April 2002)
- Information Notice 2002-15, Hydrogen Combustion Events in Foreign BWR Piping (12 April 2002)
- Information Notice 2002-17, Attachment: Recent Misadministrations Caused by Incorrect Calibrations of STRONTIUM-90 Eye Applicators (30 May 2002, Topic: Brachytherapy)
- Information Notice 2002-18, Effect of Adding Gas Into Water Storage Tanks on the Net Positive Suction Head for Pumps (6 June 2002, Topic: Brachytherapy)
- Information Notice 2002-19, Medical Misadministrations Caused by Failure to Properly Perform Tests on Dose Calibrators for Beta-and-Low-Energy Photon-Emitting Radionuclides (14 June 2002, Topic: Brachytherapy)
- Information Notice 2002-21, Axial Outside-Diameter Crackling Affecting Thermally Treated Alloy 600 Steam Generator Tubing (1 April 2003, Topic: Boric Acid)
- Information Notice 2002-22, Degraded Bearing Surfaces in Gm/Emd Emergency Diesel Generators (28 June 2002, Topic: Brachytherapy)
- Information Notice 2002-23, Unauthorized Administration of Byproduct Material for Medical Use (21 March 2006)
- Information Notice 2002-24, Potential Problems with Heat Collectors on Fire Protection Sprinklers (19 July 2002, Topic: Fire Protection Program, Brachytherapy)
- Information Notice 2002-25, Challenges to Licensees' Ability to Provide Prompt Public Notification and Information During An Emergency Preparedness Event (26 August 2002, Topic: Inadvertent Siren Activation)
- Information Notice 2002-25, Challenges to Licensees' Ability to Provide Prompt Public Notification and Information During an Emergency Preparedness Event (26 August 2002, Topic: Inadvertent Siren Activation)
- Information Notice 2002-26, Vermont Yankee July 2008 Evidentiary Hearing - Intervenor Exhibit NEC-JH 56, NRC Information Notice 2002-26, Supplement 2: Additional Flow-Induced Vibration Failures After a Recent Power Uprate (9 January 2004, Topic: Safe Shutdown)
- Information Notice 2002-27, Recent Fires at Commercial Nuclear Power Plants in the United States (20 September 2002, Topic: Safe Shutdown, Temporary Modification)
- Information Notice 2002-28, Appointment of Radiation Safety Officers and Authorized Users Under 10 CFR Part 35 (27 September 2002, Topic: Brachytherapy)
- Information Notice 2002-29, (Errata): Recent Design Problems in Safety Functions of Pneumatic Systems (6 November 2002)
- Information Notice 2002-30, Control and Surveillance of Portable Gauges During Field Operations (30 October 2002, Topic: Brachytherapy, Moisture Density Gauge, Moisture-Density Gauge, Stolen)
- Information Notice 2002-31, Potentially Defective UF6 Cylinder Valves (1-inch) (24 March 2003)
- Information Notice 2002-31, Potentially Defective Uf6 Cylinder Valves (1-inch) (24 March 2003)
- Information Notice 2002-32, Electromigration on Semiconductor Integrated Circuits (31 October 2002)
- Information Notice 2002-33, Notification of Permanent Injunction Against Neutron Products Incorporated of Dickerson, Maryland (22 November 2002, Topic: Uranium Hexafluoride)
- Information Notice 2002-34, Failure of Safety-Related Circuit Breaker External Auxiliary Switches at Columbia Generating Station (25 November 2002)
- Information Notice 2002-35, Changes to 10 CFR Parts 71 and 72 Quality Assurance Programs (20 December 2002)
- Information Notice 2002-36, Incomplete or Inaccurate Information Provided to the Licensee And/Or NRC by Any Contractor or Subcontractor Employees (27 December 2002)
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