United States Nuclear Regulatory Commission - Protecting People and the Environment
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Part 21 Reports

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The U.S. Nuclear Regulatory Commission (NRC) receives reports from its licensees under Part 21 of Title 10 of the Code of Federal Regulations. This regulation specifies the conditions under which information must be submitted when a licensed facility, activity, or basic component fails to comply with the Atomic Energy Act of 1954, as amended, or other NRC regulations.

As of November 27, 2018, a web page listing 50.73 Licensee Event Reports that may report Defects and Noncompliance (in lieu of Part 21) is being provided for information purposes only. It is important to note that the information contained in these Licensee Event Reports is provided by the licensee, and has not been verified by the NRC to actually constitute a defect as described in 10 CFR Part 21. The NRC initially introduced the practice of linking Licensee Event Reports that may report Defects and Noncompliance to the Part 21 Reports page of the NRC public website in Information Notice 2011-19 "Licensee Event Reports Containing Information Pertaining to Defects to Basic Components."

Recently Updated Reports

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Log No. Notifier Description Report Date Event No. / Accession No.
2019-11-00 AMETEK Solidstate Controls Notification of Potential Defect - 10 CFR Part 21
04/12/2019 ML19106A106
2019-10-00

Weir Valves & Controls USA, Inc.

Part 21 Report - Residual Heat Removal System Motor Operated Globe Valve Experienced Stem Failures 04/04/2019 ML19101A097
2019-03-01 Engine Systems Inc. 10 CFR 21 Reportable Notification on Excitation Transformers for Vickers Voltage Regulator System 03/21/2019 ML19087A252
2019-09-00

Weir Valves & Controls USA, Inc.

10 CFR Part 21 Report: 24" Class 150 Globe Failed to fully Open due to the Failure of the Anti-Rotation Key 03/11/2019 ML19087A251
2019-05-01 AZZ Nuclear Updated Part 21 Notification of Potential 10 CFR Part 21, EATON A200 Series Starters/Contactors 03/08/2019 ML19080A059
2018-24-02 Curtiss-Wright Nuclear Division Interim Notification Report for Potential Part 21 (Second Update) 03/08/2019 ML19078A087
2019-08-00 Curtis-Wright Flow Control Co. Target Rock Solenoid Valve 810000-X Positioner Circuit Failure May Cause Undesired Position 03/06/2019 ML19072A063
2018-23-01 Palo Verde Nuclear Generating Station Closure of Interim 10 CFR 21 Report for General Electric Hitachi (GEH) Relay Contact Cartridge DJ148C6159P001 03/06/2019 ML19065A297
2018-26-02 ABB Motors and Mechanical Inc. Closure of Interim Part 21 Report – Evaluation Of Motors 03/04/2019 ML19072A064
2018-18-03 Lake Engineering Co. Final Notification for Degraded Snubber SF1154 Hydraulic Fluid Batch No. 11KLVS146 03/01/2019 ML19071A112
2019-07-00 Flowserve Spring Deflection Causing Potential Hang-Up of the Flapper (Disc), Worcester Series 44 02/20/2019 ML19064A231
2019-07-00 Flowserve Spring Deflection Causing Potential Hang-Up of the Flapper (Disc), Worcester Series 44 02/20/2019 ML19064A231
2019-06-00 Xcel Energy / Monticello "C" Outboard Main Steam Line Isolation Valve Delayed Closure Due to Foreign Material in the Air Valve (LER and Part 21 Report) 02/14/2019 ML19046A002
2019-05-00 AZZ Nuclear Part 21 Initial Notification of Potential 10 CFR Part 21, EATON A200 Series Starters/Contactors 02/08/2019 ML19053A499
2018-29-01 Xcel Energy / Monticello Cancellation of Non-Fully Closed Check Valves Resulted in a Potential Pathway Outside Secondary Containment (Cancellation of LER and Interim Part 21 report) 02/07/2019 ML19038A258
2019-04-00 SOR Inc. Part 21 Notification of Deviation SOR R-Series Housing with Terminal Block 02/01/2019 ML19053A500
2019-03-00 Engine Systems Inc. Part 21 Report - Saturable Reactor (Magnetic Amplifier) for Vickers Voltage Regulator System, P/N 8408218-ESI 01/25/2019 ML19042A080
2019-02-00 Weschler Instruments Notification of a Potential Defect in Weschler KX-241 axial, VX-252 and VC-252 Instrument Models 01/17/2019 ML19024A163
2018-26-01 ABB Motors and Mechanical Inc. Second Interim Report from ABB Motors and Mechanical Inc. (formerly Baldor Electric Company) on three AC electric motors 01/11/2019 ML19024A165
2019-01-00 AMETEK Solidstate Controls Dedication Testing not performed on Safety-Related Operational Spare Parts Kits 01/07/2019 ML19024A164
2018-18-02 Lake Engineering Co. Third Interim Notification for Degraded Snubber SF1154 Hydraulic Fluid Batch No. 11KLVS146 01/04/2019 ML19008A043
2018-30-01 Engine Systems, Inc. Revision 1 to 10 CFR 21 Reportable Condition on EMD Fuel and Soakback Pumps 12/21/2018 ML19002A204
2018-32-00 Mirion Technologies (Canberra), Inc. Part 21 Report Related to Relay Chatter in Safety-Related Radiation Monitoring Systems 12/06/2018 ML18341A247
2018-31-00

Framatome, Inc.

Part 21 Notification of Existence of a Defect Involving O-ring Supplied in Chesterton Pump Seal Cartridge 12/06/2018 ML18344A054
2018-30-00 Engine Systems, Inc. 10 CFR 21 Reportable Condition on EMD Fuel and Soakback Pumps 11/30/2018 ML18353A428
2018-13-01 National Technical Systems (NTS) Closure of Potential Part 21 on Dedicated Items not Available for PMI Testing (NUPIC) 11/09/2018 ML18327A033
2018-29-00 Xcel Energy / Monticello Non-Fully Closed Check Valves Resulted in a Potential Pathway Outside Secondary Containment (LER and Interim Part 21 report) 11/09/2018 ML18313A256
2018-28-00

Emerson - Fisher Controls International

Fisher Digital Valve Controllers 6000/6200 Series not Environmentally Qualified

10/31/2018 ML18309A035
2018-14-02 AAF International / Flanders Unapproved Design Change in a High Efficiency Particulate Air Filter (Second Update). 10/31/2018 ML18313A033
2018-27-00 ITT Enidine ITT Conoflow GT25 Series Current to Pressure Transducer Failure to Comply with EQ Test Report Specifications 10/19/2018 ML18302A228
2018-26-00 ABB Motors and Mechanical Inc. Interim Report from ABB Motors and Mechanical Inc. (formerly Baldor Electric Company) on three AC electric motors 10/12/2018 ML18302A229
2018-25-00 ABB Inc. 10 CFR Part 21 Notification of Deviation, Dry Type Transformer Serial # 24-26458 10/10/2018 ML18289A455
2018-24-00 Curtiss-Wright Nuclear Division Interim Notification Report for Potential Part 21 with Exelon PowerLabs Failure Analysis 10/08/2018 ML18289A457

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Page Last Reviewed/Updated Tuesday, April 16, 2019