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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.
2021-08-01 Meggitt Safety Solutions, Inc. Closure of MSSI Interim Report of a Deviation pursuant to 10 CFR 21.21(a)(2) 06/04/2021 ML21161A008
2021-03-01 Crane Nuclear, Inc. Closure of Potential Part 21 Issue 06/03/2021 ML21158A007
2020-21-05 Lake Engineering Co. Sixth Interim Notification per 10 CFR Part 21, Degraded Snubber SF1154 Hydraulic Fluid Batch No. 17BLVS293 05/07/2021 ML21146A246
2021-10-00 Xcel Energy / Monticello Initial and Final Written 10 CFR 21 Notification for GE Hitachi NUMAC Power Range Nuclear Monitoring System 05/07/2021 ML21130A302
2021-06-02 Paragon Energy Solutions Failure of Size 1 and 2 Freedom Series FVR Starters (Updated Part Numbers and Date Codes) 05/03/2021 EN 55223
2021-06-01 Paragon Energy Solutions Failure of Size 1 and 2 Freedom Series FVR Starters 04/29/2021 ML21126A172
2021-02-01 Flowserve Limitorque Final Report of the Evaluation of a Deviation Pursuant to 10 CFR 21.21(a)(2) 04/20/2021 ML21111A322
2021-09-00 GE Hitachi Nuclear Energy Part 21 60-Day Interim Report Notification: Side Entry Orifice Hydraulic Loss Coefficient (SC 21-04 R0) 04/19/2021 ML21109A337
2021-07-01 AMETEK Solidstate Controls Udated Notification of Potential Defect - 300V, 250A Clamp Diodes 04/06/2021 ML21096A114
2021-08-00 Meggitt Safety Solutions, Inc Interim Report of a Deviation pursuant to 10 CFR 21.21(a)(2) 04/05/2021 ML21099A085

2020-06-01

 Fluke Health Solutions Final Part 21 Report re: Nickel Seal Ring Heat Treatment Dedication. 04/02/2021

ML21098A155
2021-07-00 AMETEK Solidstate Controls Notification of Potential Defect - 300V, 250A Clamp Diodes 04/01/2021 ML21092A129
2021-06-00 Paragon Energy Solutions Failure of Size 1 and 2 Freedom Series FVR Starters 03/30/2021 EN 55162
2021-04-00 Browns Ferry Nuclear Power Plant Interim Report of a Deviation or Failure to Comply 03/23/2021 ML21082A116
2021-01-01 Arkansas Nuclear One, Unit 1 Retraction of an Interim Report Concerning an Evaluation of Deviation 03/15/2021 ML21074A338
2021-03-00 Crane Nuclear, Inc. Potential Part 21 Issue  03/05/2021 ML21089A050
2020-21-04 Lake Engineering Co. Fifth Interim Notification per 10 CFR Part 21, Degraded Snubber SF1154 Hydraulic Fluid Batch No. 17BLVS293 02/17/2021 ML21063A153
2021-05-01

Gutor Electronic LLC

 Final Report of Notification of Potential Defect (A070 Controller Boards) 03/19/2021 ML21105A359
2021-05-00 Gutor Electronic LLC Potential Defect of Basic Components (A070) Controller Boards 02/12/2021 ML21084A114
2021-02-00 Flowserve Limitorque Interim Report of the Evaluation of a Deviation Pursuant to 10 CFR 21.21(a)(2) 02/04/2021 ML21036A187
2019-33-01 Westinghouse Electric Company Closure of Westinghouse Interim Report of the Evaluation of a Deviation Related to 'T cold' Measurement Uncertainty [Log No. 2019-33-00 (ML19294C507)] 03/12/2020 ML20077M122
2021-01-00 Arkansas Nuclear One, Unit 1 Interim Report Concerning an Evaluation of Deviation 01/18/2021 ML21018A005
2020-32-01 Curtiss-Wright Nuclear Division 10 CFR Part 21 Notification for SF-1154 Hydraulic Fluid Batch 17BLVS293 (Update) 12/15/2020 ML20366A045
2020-21-03 Lake Engineering Co. Fourth Interim Notification per 10 CFR Part 21, Degraded Snubber SF1154 Hydraulic Fluid Batch No. 17BLVS293 12/07/2020 ML21014A234
2020-32-00 Curtiss-Wright Nuclear Division 10 CFR Part 21 Notification for SF-1154 Hydraulic Fluid Batch 17BLVS293 11/18/2020 ML20366A047
2020-31-00 Engine Systems, Inc. 10 CFR Part 21 Reportable Notification on a Camshaft Key, Part Number KSV-16-6E#1 12/10/2020 ML20350B551
2020-10-01 AMETEK Solidstate Controls Revised Notification of Potential Defect regarding AMETEK Power Supply, series 85-RPXXX 12/09/2020 ML20344A280
2016-72-01 Engine Systems, Inc. Revised 10 CFR 21 Report on Subcover Assembly P/N 1A-7846 and Machined Subcover P/N 03-362-04-AH) 12/04/2020 ML20344A108
2020-30-00 QualTech NP 10 CFR Part 21 Notification for a Curtiss-Wright supplied Royce Compressor 11/16/2020 ML20321A238
2020-03-04 Lake Engineering Co. Final Notification per 10 CFR Part 21, Degraded Snubber SF1154 Hydraulic Fluid Batch No. 16DLVS852 10/14/2020 ML20304A161
2018-12-02 Framatome Inc. Updated Notification of 10 CFR 21 Defect – Failure of Relays to Change State 10/23/2020 ML20300A166
2020-21-02 Lake Engineering Co. Third Interim Notification per 10 CFR Part 21, Degraded Snubber SF1154 Hydraulic Fluid Batch No. 17BLVS293 10/06/2020 ML20296A276
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

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Page Last Reviewed/Updated Friday, June 11, 2021

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