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.
2020-29-00 Nutherm International, Inc. Part 21 Notification – Continuously Energized Eaton D26 Relays 09/25/2020 ML20274A084
2020-28-00 Nine Mile Point Unit 2 Failure to Meet Technical Specification MSIV Stroke Times (a 50.73 LER Supplement and Part 21 Report) 08/31/2020 ML20255A078
2020-23-01 Paragon Energy Solutions Failures of Size 1 and 2 Freedom Series Auxiliary Contacts 07/21/2020 ML20255A200
2020-11-01 Flowserve US, Inc. Bench Test Failure of Model 38878-x, 3-Way, 2-Position Solenoid Valves at Seabrook Station for use on FWIV Actuator 06/11/2020 ML20255A199
2020-27-01 Waterford 3 Defect of Masoneilan 8012N-3C Electropneumatic Positioner 09/01/2020 ML20245E499
2020-27-00 Waterford 3 Defect of Masoneilan 8012N-3C Electropneumatic Positioner 08/10/2020 EN 54827
2020-21-01 Lake Engineering Co. Second Interim Notification per 10 CFR Part 21, Degraded Snubber SF1154 Hydraulic Fluid Batch No. 17BLVS293 08/07/2020 ML20241A081
2020-03-03 Lake Engineering Co. Fourth Interim Notification per 10 CFR Part 21, Degraded Snubber SF1154 Hydraulic Fluid Batch No. 16DLVS852 08/03/2020 ML20234A353
2020-26-01 Southern Nuclear – Vogtle 30-Day 10 CFR Part 21 Notification – Continuously Energized Eaton D26 Relays Could Fail to Deenergize Because of an Organic C3 Insulating Material 07/22/2020 ML20204A970
2020-26-00 Southern Nuclear – Vogtle Initial 10 CFR Part 21 Notification – Continuously Energized Eaton D26 Relays Could Fail to Deenergize Because of an Organic C3 Insulating Material 06/24/2020 ML20176A321
2020-25-00 Curtiss-Wright Nuclear Division 10 CFR Part 21 Notification for SF-1154 Hydraulic Fluid Batch Number 16DLVS852 04/21/2020 ML20206K891
2020-24-00 Piezotech LLC Parts Manufactured Using Source Material Without a Specific License 07/09/2020 EN 54767
2020-23-00 Paragon Energy Solutions Failures of Size 1 and 2 Freedom Series Auxiliary Contacts 06/30/2020 EN 54760
2020-22-00 United Controls International 10CFR21 Notification for ABB/Thomas & Betts/Cyberex P/N: 93-41-119385 Time Delay Oscillator Printed Circuit Boards 06/29/2020 EN 54758
2020-21-00 Lake Engineering Co. Interim Notification per 10 CFR Part 21, Degraded Snubber SF1154 Hydraulic Fluid Batch No. 17BLVS293 06/08/2020 ML20178A308
2020-20-00 GE-Hitachi Nuclear Energy Americas, LLC Non-Conservative BWR/6 Side Entry Orifice (SEO) Loss Coefficients 06/24/2020 ML20176A432
2020-16-01 Diablo Canyon Inadequate Commercial Grade Dedication of Replacement Marsh Bellofram Engine Thermocouples (Written Notification) 06/16/2020 ML20168A888
2020-19-00 Point Beach Nuclear Plant Interim Report for Reactor Protection System Channel Failure Results in Operation Prohibited by Technical Specification 06/11/2020 ML20163A561
2020-03-02 Lake Engineering Co. Third Interim Notification per 10 CFR Part 21, Degraded Snubber SF1154 Hydraulic Fluid Batch No. 16DLVS852 06/04/2020 ML20171A401
2020-18-00 Dresser LLC 10 CFR Part 21 Report for Dresser LLC (Masoneilan) Valves with Screwed Baffle Design 06/03/2020 ML20164A085
2020-17-00 Paragon Energy Solutions Part 21 Initial Report- Failures of Size 1 and 2 Freedom Series Auxiliary Contacts 06/03/2020 EN 54734
2020-16-00 Diablo Canyon Inadequate Commercial Grade Dedication of Replacement Marsh Bellofram Engine Thermocouples 05/20/2020 EN 54721
2020-15-00 Curtiss-Wright Nuclear Division 10 CFR Part 21 Report Notification for certain Curtiss-Wright Scientech RTL500 and RTL851 Modules 04/21/2020 ML20136A255
2020-14-00 Schulz Electric Degraded Vertical Motor Bearing Oil Reservoir Recoating 04/14/2020 EN 54664
2019-36-01 Palo Verde Nuclear Generating Station 10 CFR 21 Notification for Masoneilan Model 8005N Transducer 03/27/2020 EN 54621
2020-03-01 Lake Engineering Co. Second Interim Notification per 10 CFR Part 21, Degraded Snubber SF1154 Hydraulic Fluid Batch No. 16DLVS852 03/20/2020 ML20097B691
2020-13-00 Engine Systems, Inc. Test Stand Deficiency May Damage P/N H40084720 EMD Fuel Injectors 03/19/2020 EN 54588
2020-12-00 Holtec International 10 CFR 21 Reportable Issue with Stainless Steel Tubes Supplied by Sandvik Materials Technology 03/16/2020 ML20078J459
2019-33-01 Westinghouse Electric Company Closure of Westinghouse Interim Report Log No. 2019-33-00 03/12/2020 ML20077M122
2020-11-00 Flowserve U S, Inc. Interim Report of Bench Test Failure of Model 38878-x, 3-Way, 2-Position Solenoid Valves at Seabrook Station for use on FWIV Actuator 03/12/2020 ML20076C858
2020-02-01 Carrier Corporation Final Report / Notification of Defect Pursuant to 10 CFR Part 21 for 17FA999-1200-107 Oil Pump 03/09/2020 ML20073G457
2019-39-01 Westinghouse Electric Company NSAL-20-1 Revision 0, "Reactor Vessel Head Control Rod Drive Mechanism Penetration Thermal Sleeve Cross-Sectional Failure" (Note: NSAL-20-1 is not a Part 21 report. However NSAL-20-1 does contain additional information related to the condition described in Part 21 report 2019-0039-00). 03/02/2020 ML20063J583
2019-37-01 Rosemount Nuclear Instruments, Inc. Notification under 10 CFR Part 21 for Rosemount Model 1153, 1154, and 3150 Series Pressure Transmitters 02/26/2020 ML20064C149
2020-09-00 C&D Technologies, Inc. 10 CFR Part 21 Evaluation Regarding Container Failure in KCR-07 Batteries 02/11/2020 ML20049A075
2020-10-00 Ametek Solidstate Controls Notification of Potential Defect Regarding AMETEK Power Supply, Series 85-RPXXX 02/11/2020 ML20049A076
2020-07-00 Fairbanks Morse 10 CFR 21.21(d)(3)(ii) Notification, Unknown Tightness of Opposed Piston Diesel Engine Cam Thrust Lock Nut Assembly 01/31/2020 ML20049A074
2020-04-01 Curtiss-Wright Flow Control 10 CFR Part 21 Report - Notification of a Defect - Modification of a Valve Component and Main Disc Lift Misadjustment (Update) 01/31/2020 ML20042E252
2020-08-00 Cameron Notification Regarding Barton Model 763 or 763A or 764 Electronic Transmitter Qualified Life Update 01/30/2020 ML20038A272
2020-04-00 Curtiss-Wright Flow Control 10 CFR Part 21 Report, Notification of a Defect Modification of a Valve Component and Main Disc Lift Misadjustment 01/21/2020 ML20029D161
2020-06-00 Fluke Health Solutions 10 CFR Part 21 Interim Report re: Nickel Seal Rings 01/20/2020 ML20024E245
2020-05-00 United Controls International 10 CFR Part 21 Notification for Ashcroft Industrial and Weksler Regal Gauges 01/13/2020 ML20028D380
2020-02-00 Carrier Corporation Interim Report of Defect Pursuant to 10 CFR Part 21 – Failure of Improperly Assembled Oil Pump 01/10/2020 ML20016A220
2020-08-01 Cameron Nuclear Product Advisory 210316064.2, "BARTON 763/763A/764 Transmitter Heat Rise and Qualified Life." (Note: This Nuclear Product Advisory is not a Part 21 report. However the Product Advisory does contain additional information related to the condition described in Part 21 Report 2020-0008-00). 01/09/2020 ML20044F577
2020-01-00 Engine Systems, Inc. Inadequate Thread Modification on Selenium Surge Suppressors (EMD P/N 8403049) 01/08/2020 ML20024E255
2020-03-00 Lake Engineering Co. Interim Notification per 10 CFR Part 21, Degraded Snubber SF1154 Hydraulic Fluid Batch No. 16DLVS852 01/03/2020 ML20021A045
2019-39-00 Westinghouse Electric Company Potential Existence of Defect Pursuant to 10 CFR Part 21: Identification of a Fractured and Dislocated Control Rod Drive Mechanism (CRDM) Thermal Sleeve. 12/12/2019 ML19346H873
2019-38-00 General Atomics Reportable Occurrence under 10CFR21: Reported Failure in Analog High Range Radiation Monitor (RP-2C). 12/10/2019 ML19347A426
2019-37-00 Rosemount Nuclear Instruments, Inc. Interim Notification under 10 CFR Part 21 for Rosemount Model 1153 and 1154 Pressure Transmitters 12/05/2019 ML19361A029
2019-36-00 Palo Verde Nuclear Generating Station Interim 10 CFR 21 Report for Masoneilan Model 8005N Transducer 11/15/2019 ML19323C971
2019-35-00 Frontek Anchor/Darling Enterprises, Inc. Degraded Hydraulic Snubber Fluid 11/06/2019 EN 54375
2019-15-04 Lake Engineering Co. Potentially Degraded Snubber SF1154 Hydraulic Fluid Batch ZJS1518 Final Report per 10 CFR Part 21 11/07/2019 ML19325C094
2019-27-01 Flowserve Final Report (Event # 54301) – ASME Section III – NC-4000, Base Material Acceptance Criteria Usage in lieu of Welding Acceptance Criteria for Valves with Temporary Attachments (i.e. – Lug removal areas). 10/22/2019 ML19351D242
2019-31-00 Curtiss-Wright Nuclear Division Incorrectly Wired Socket Side Quick Disconnect Connectors 10/22/2019 EN 54345
2019-30-01 Palo Verde Nuclear Generating Station (PVNGS) Units 1, 2, and 3 Written Defect Notification for GE-Hitachi Stationary Primary Contact Finger Q0114C5382P002 10/31/2019 ML19304B607
2019-32-00 Engine Systems, Inc. Report No. 10 CFR21-0127, Rev. 0, EMD Fuel Injectors - Seized Plunger and Bushing 10/25/2019 ML19317D093
2019-30-00 Palo Verde Units 1, 2 and 3 GE Hitachi Primary Contact Finger Surface Defect 10/04/2019 EN 54309
2019-34-00 Browns Ferry, Units 1, 2, and 3 Interim Report of a Deviation or Failure to Comply (GEH terminal board clip block, part number 228B2374P003) 10/29/2019 ML19302D983
2019-33-00 Westinghouse Electric Company Interim Report of the Evaluation of a Deviation Related to 'T cold' Measurement Uncertainty 10/21/2019 ML19294C507
2019-29-00 AZZ Nuclear Group Initial 10 CFR Part 21 Notification - F10 Series MCC Cubicle Stab Alignment - Ref: P21-10042019-1 10/04/2019 ML19305B576
2019-19-02 Engine Systems, Inc. 10CFR21 Reporting of Defects and Non-Compliance (Signal Converter Transmitter) (Rev. 1) 10/11/2019 ML19295D732
2019-28-00 Arkansas Nuclear One ITE/Gould J20M Coil Block Relay 10/02/2019 EN 54215
2019-27-00 Flowserve Use of Base Material Acceptance Criteria in Lieu of Welding Acceptance Criteria for Valves with Temporary Attachments (i.e. – Lug Removal Areas). 09/30/2019 ML19281B133
2019-26-00 Westinghouse Electric Company NSAL-19-2 Revision 0, "Contactors Failing to Release/Open When De-energized." 09/24/2019 ML19269B709
2019-25-00 Rotork Controls, Inc. Part 21 Notification Concerning a Safety Related "Outer Clutch Ring", Part Number N40039. 09/23/2019 ML19290E236
2019-15-03 Lake Engineering Co. Third [Fourth] Interim Notification per 10 CFR Part 21, Degraded Snubber SF1154 Hydraulic Fluid Batch No. ZJS1518 09/09/2019 ML19263A666
2019-22-01 Flowserve Flow Control Division Non-Destructive Examination Performance of Components by an Unqualified Employee (Final Report) 09/06/2019 ML19261A194
2019-05-02 AZZ Nuclear Report of Potential 10 CFR Part 21, EATON A200 Series Starters/Contactors 08/29/2019 ML19253A053
2018-14-03 AAF International / Flanders Unapproved Design Change in a High Efficiency Particulate Air Filter (Final Report). 08/08/2019 ML19248B766
2019-21-01 Columbia Generating Station Part 21 Written Notification - Spectrum Technologies Control Power Transformers (Micron model B150-2957-1)
09/03/2019 ML19247C581
2019-24-00 Emerson Process Management, LLC Fisher Information Notice: FIN 2019-01 – Mechanical Setting of Disk/Stem Taper Pins 08/23/2019 ML19239A124
2019-23-00 Engine Systems, Inc. Report No 10CFR21-0126, Rev 0 – EMD Fuel Injector – Cracked Spray Tip, PIN 5229250 08/22/2019 ML19246A102
2019-22-00 Flowserve Flow Control Division Non-Destructive Examination Performance of Components by an Unqualified Employee 08/12/2019 EN 54215
2019-21-00 Columbia Generating Station Part 21 Notification - Spectrum Technologies Control Power Transformers (Micron model B150-2957-1) 08/08/2019 EN 54206
2019-18-01

Ultra Electronics

Updated Interim Notification Per 10CFR21 (Foxboro Weed N-E11 & N-E13 Series transmitters) 07/26/2019 ML19213A025
2019-19-01 Engine Systems, Inc. 10CFR21 Reporting of Defects and Non-Compliance (Signal Converter Transmitter) 07/19/2019 ML19207A056
2019-20-03 ITT Engineered Valves, LLC Revised Final Report to the NRC of 10 CFR 21 Event 54118 Concerning #25 AM Diaphragm Valves 08/20/2019 ML19234A129
2019-20-02 ITT Engineered Valves, LLC Final Report to the NRC of 10 CFR 21 Event 54118 Concerning #25 AM Diaphragm Valves 08/13/2019 ML19228A122
2019-20-01 ITT Engineered Valves, LLC Part 21 Written Report Concerning #25 Airmotor Diaphragm. 07/12/2019 ML19197A049
2019-17-02 Curtiss-Wright SAS Update to 10 CFR Part 21 Reporting of Defects for Introl Positioner 890265-010 - CW SAS Initial Report No. 10CFR21-48 07/11/2019 ML19210D434
2019-15-02 Lake Engineering Co. Third Interim Notification per 10 CFR Part 21, Degraded Snubber SF1154 Hydraulic Fluid Batch No. ZJS1518 07/05/2019 ML19199A034
2019-20-00 ITT Engineered Valves, LLC Potential Part 21 Issue Concerning #25 Airmotor Diaphragm 06/14/2019 ML19171A033
2019-17-01 Curtiss-Wright SAS 10 CFR Part 21 Reporting of Defects for Introl Positioner 890265-010 - CW SAS Initial Report No. 10CFR21-48 06/07/2019 ML19190A048
2019-19-00 Engine Systems, Inc. Interim Report 10CFR21 Reporting of Defects and Non-Compliance (Signal Converter Transmitter) 06/05/2019 ML19165A027
2019-18-00

Ultra Electronics

Interim Notification Per 10CFR21 (Foxboro Weed N-E11 & N-E13 Series transmitters) 05/31/2019 ML19155A084
2018-24-03 Curtiss-Wright Nuclear Division Notification Report for Potential Part 21 (Final Report) 05/31/2019 ML19168A010
2019-17-00 Paragon Energy Solutions LLC 10 CFR Part 21 Report of Defect - GS2 Terry Turbine Introl Positioners 05/31/2019 ML19168A012
2019-16-00 SSM Industries, Inc. Notification of Potential Defect Applicable to Hytork XL 1126 Pneumatic Actuator 05/22/2019 ML19154A207
2019-15-01

Lake Engineering Co.

Second Interim Notification per 10 CFR Part 21, Degraded Snubber SF1154 Hydraulic Fluid Batch No. ZJS1518 05/06/2019 ML19136A044
2019-14-00 Flowserve Nuclear Products Operations (Vernon) Notification of Defect - Pressure Breakdown Sleeve, Part Number 09125139 installed in in Charging Pump Model - 2" RLIJ 04/25/2019 ML19119A085
2019-13-00 AZZ Nuclear Interim Report of Potential 10 CFR Part 21, EATON Size 1 and 2 A200 Series Starters/Contactors 04/17/2019 ML19120A106
2019-12-00 Curtiss-Wright Nuclear Division, Enertech 10 CFR Part 21 Notification for SF-1154 Hydraulic Fluid
04/15/2019 ML19121A155
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
2019-15-00 Lake Engineering Co. Interim Notification per 10 CFR Part 21, Degraded Snubber SF1154 Hydraulic Fluid Batch No. ZJS1518 03/05/2019 ML19077A096
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 Friday, October 02, 2020