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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. |
|---|---|---|---|---|
RSCC Wire & Cable LLC | Part 21 Report - Non-Compliant Insulated Conductor - Update | 09/09/2025 | ||
Valcor Engineering Corporation | Interim 10 CFR Part 21 Report Regarding Columbia Generating Station (CGS) - Part 21 Notification EN 57785 | 08/27/2025 | ||
DC Cook Nuclear Plant | Part 21 30 Day Notification Associated with Emergency Diesel Generator (EDG) Voltage Regulator (VR) | 08/27/2025 | ||
Ametek Solidstate Controls, Inc | Final Report of a Deviation Associated with Ametek Regulating Transformer Model 85-IS0150-14 | 08/20/2025 | ||
DC Cook Nuclear Plant | Initial Report Notification Pursuant to 10 CFR Part 21.21 Concerning Thermal Overload of Voltage Regulators | 07/29/2025 | ||
Curtiss-Wright Nuclear Division | Interim Notification Report for Potential Part 21 - Curtiss Wright (CW) supplied NAMCO Limit Switches PN: EA700-80926, Date Code: 0425 | 07/25/2025 | ||
Ametek Magnetrol USA, LLC | Notification of Potential Defect - l0 CFR Part 21 - Magnetrol Displacer Level Switch A103F-3X-Y-MPG-TDM-SMD4DC | 07/02/2025 | ||
Tennessee Valley Authority | Interim Report of a Deviation or Failure to Comply Associated with a Valve in the Unit 3 Diesel Generator Starting Air System | 07/18/2025 | ||
Columbia Generating Station | Updated Report of a Deviation Associated with O-Rings for Solenoid Valves Pursuant to 10 CFR 21.21(d)(3)(ii) | 07/17/2025 | ||
Cooper Nuclear Station | 10 CFR Part 21 Report Regarding Diesel Generator Jacket Water pump | 07/15/2025 | ||
ASCO Valve, Inc (Emerson) | ASCO NP8321 Series Valves Do Not Shift or Partially Shift After Periods of Extended De-Energization | 07/11/2025 | ||
Tennessee Valley Authority | 10 CFR 21 Notification -- Defect Associated with Anchor Darling Double-disc Gate Valve | 07/10/2025 | ||
RSCC Wire & Cable LLC | Part 21 Report - Non-Compliant Insulated Conductor - Update | 07/02/2025 | ||
Westinghouse Electric Co | Interim Report of the Evaluation of a Deviation Pursuant to 10 CFR 21.21(a)(2) | 06/27/2025 | ||
Columbia Generating Station | Part 21 - Valcor Solenoid Valve Defect Identified | 06/26/2025 | ||
Cooper Nuclear Station | Part 21 Report – Diesel Generator Jacket Water Pump Failure | 06/20/2025 | ||
Paragon Energy Solutions | 10 CFR Part 21 Notification: P21-03302021, Rev. 3: Failures of Size 1 and 2 Freedom Series Full Voltage Reversing Starters | 06/20/2025 | ||
Framatome Inc. | Notification of 10 CFR 21 Defect Associated with Control Rod Drive Mechanism Thermal Sleeves | 06/11/2025 | ||
Tennessee Valley Authority | PART 21 - Improper Upper Wedge-to-Stem Joint in a Commercially Sourced Double-Disc Gate Valve | 06/10/2025 | ||
RSCC Wire & Cable LLC | Update to Retraction of Final Report of a Deviation Associated with a Non-compliant Insulated Conductor | 06/03/2025 | ||
James A FitzPatrick Nuclear Power Plant | 10 CFR 21 Notification for GE Hitachi Molded Case Circuit Breakers Failed to Instantaneously Trip | 05/29/2025 | ||
Framatome Inc. | 10 CFR 21 Notification of Existence of a Defect Associated with Circuit Breaker Model 5-3AF-GEU-350-1200 | 05/29/2025 | ||
Framatome Inc. | Interim Report of a Deviation Associated with Circuit Breaker Defect, Model 5-3AF-GEU-350-1200 | 05/22/2025 | ||
James A FitzPatrick Nuclear Power Plant | Interim Report of a Deviation Associated with GE Hitachi Molded Case Circuit Breakers - Part number DD148C6151P004 (Asea Brown Boveri (ABB) part number: TB13030BWE05) | 05/08/2025 | ||
Curtiss-Wright Nuclear Division | Final Report of a Deviation Associated with Generation 3 QDCs Produced from Curtiss-Wright Middleburg Heights | 05/06/2025 | ||
RSCC Wire & Cable LLC | Update to Retraction of Final Report of a Deviation Associated with a Non-compliant Insulated Conductor | 05/06/2025 | ||
ASCO Valve, Inc (Emerson) | Interim Report of a Deviation Associated with ASCO NP8321 Series Valves | 04/24/2025 | ||
Southern Nuclear Operating Company | Updated Interim Report of a Deviation Associated with an ETAP Software Error in Transient Stability Program | 04/24/2025 | ||
Curtiss-Wright Nuclear Division | Updated Interim Report of a Deviation Associated with GE Over/Under Voltage Time Delay Relay PN: 12|AV69A1A | 04/09/2025 | ||
Curtiss-Wright Nuclear Division | Interim Report of a Deviation Associated with GE Over/Under Voltage Time Delay Relay PN: 12|AV69A1A | 04/08/2025 | ||
RSCC Wire & Cable LLC | Update to Retraction of Final Report of a Deviation Associated with a Non-compliant Insulated Conductor | 03/28/2025 | ||
Southern Nuclear Operating Company | Interim Report of a Deviation Associated with an ETAP Software Error in Transient Stability Program | 03/26/2025 | ||
Westinghouse Electric Co | Updated Interim Report of a Deviation Associated with Westinghouse-supplied Generation 2 and 3 CR-99 and Trident X Control Rod Blades | 03/24/2025 | ||
Duke Energy, Inc. | Updated Interim Report of a Deviation Associated with Love Controllers Identified with Limpet Supplier Part Number 54-834-838-8187-8160-8134-8174 | 03/20/2025 | ||
Ametek Solidstate Controls, Inc | Updated Final Report of a Deviation Associated with a Battery Charger Printed Circuit Board, Ametek Part #80-9214031-90, with a Locator of X302, Capacitor’s C35 and C36 | 03/13/2025 | ||
Curtiss-Wright Nuclear Division | Interim Report of a Deviation Associated with Generation 3 QDCs Produced from Curtiss-Wright Middleburg Heights | 03/12/2025 | ||
Ametek Solidstate Controls, Inc | Interim Report of a Deviation Associated with Ametek Regulating Transformer Models 85-IS0075-12 and 85-IS0150-14 | 03/11/2025 | ||
Prairie Island Nuclear Generating Plant | Closure of Interim Report of a Deviation Associated with an Edward Model 15004T5 2-inch Globe Valve | 02/28/2025 | ||
FitzPatrick Nuclear Power Plant | Closure of Interim Report of a Deviation Associated with General Electric Thermal Overload Relay, Model CR124G011, Part Number DD317A7861P003 | 02/28/2025 | ||
Ametek Solidstate Controls, Inc | Final Report of a Deviation Associated with a Battery Charger Printed Circuit Board, Ametek Part #80-9214031-90, with a Locator of X302, Capacitor’s C35 and C36 | 02/27/2025 | ||
Duke Energy, Inc. | Interim Report of a Deviation Associated with Love Controllers Identified with Limpet Supplier Part Number 54-834-838-8187-8160-8134-8174 | 02/19/2025 | ||
Flowserve US, Inc | Final Report of a Deviation Associated with Limitorque SMB-00 Torque Switch Assemblies | 02/14/2025 | ||
RSCC Wire & Cable LLC | Update to Retraction of Final Report of a Deviation Associated with a Non-compliant Insulated Conductor | 02/13/2025 | ||
Duke Energy Carolinas, LLC | Interim Report of a Deviation Associated with a Battery Charger Printed Circuit Board, Ametek Part #80-921-4031-9 | 01/31/2025 | ||
Prairie Island Nuclear Generating Plant | Interim Report of a Deviation Associated with an Edward Model 15004T5 2-inch Globe Valve | 01/24/2025 | ||
Flowserve US, Inc | Interim Report of a Deviation Associated with Limitorque SMB-00 Torque Switch Assemblies | 01/02/2025 | ||
Ametek Solidstate Controls, Inc | Interim Report of a Deviation Associated with Ametek Regulating Transformer Models 85-IS0075-12 and 85-IS0150-14 | 12/28/2024 | ||
Nextra Energy Seabrook, LLC | Final Report of a Deviation Associated with a GE Hitachi Relay CR120B (Model #DD945E118P0060) | 12/02/2024 | ||
Tennessee Valley Authority | Updated Report of a Deviation Associated with a Valve in the Unit 3 High Pressure Coolant Injection System | 11/27/2024 | ||
FitzPatrick Nuclear Power Plant | Interim Report of a Deviation Associated with General Electric Thermal Overload Relay, Model CR124G011, Part Number DD317A7861P003 | 11/22/2024 | ||
Columbia Generating Station | Interim Report of a Deviation Associated with a Substitute Compound O-ring for Type V70900-45 Valves | 11/21/2024 | ||
Nextra Energy Seabrook, LLC | Interim Report of a Deviation Associated with a GE Hitachi Relay CR120B (Model #DD945E118P0060) | 11/14/2024 | ||
North Anna Power Station | Interim Report of a Deviation Associated with a Molded Case Switch, Model: Eaton J250K | 10/28/2024 | ||
Duke Energy Carolinas, LLC | Interim Report of a Deviation Associated with a Battery Charger Printed Circuit Board, Ametek Part#80-921-4031-9 | 10/28/2024 | ||
RSCC Wire & Cable LLC | Update to Retraction of Final Report of a Deviation Associated with a Non-compliant Insulated Conductor | 10/28/2024 | ||
North Anna Power Station | Interim Report of a Deviation Associated with a Molded Case Switch, Model: Eaton J250K | 10/09/2024 | ||
NextEra Energy | Final Report of a Deviation Associated with a Westinghouse Relay, Model NBFD31S | 10/08/2024 | ||
MPR Associates, Inc | Interim Report of a Deviation Associated with Non-Compliant Contactors, Models AF80 and AF116 | 10/04/2024 | ||
Xcel Energy / Prairie Island Nuclear Generating Plant | Closure of Interim Report of a Deviation Associated with Bentley Systems Incorporated AutoPIPE Software | 10/03/2024 | ||
RSCC Wire & Cable LLC | Update to Retraction of Final Report of a Deviation Associated with a Non-compliant Insulated Conductor | 09/26/2024 | ||
NextEra Energy | Interim Report of a Deviation Associated with a Westinghouse Relay, Model NBFD31S | 09/18/2024 | ||
RSCC Wire & Cable LLC | Update to Retraction of Final Report of a Deviation Associated with a Non-compliant Insulated Conductor | 09/17/2024 | ||
Southern Nuclear Operating Co, Inc | Interim Report of a Deviation Associated with a ETAP Software Error in Transient Stability Program | 09/09/2024 | ||
Diablo Canyon Power Plant | Interim Report of a Deviation Associated with ALCO Snubber Valve Assemblies Part Number 2402466 | 09/09/2024 | ||
RSCC Wire & Cable LLC | Retraction of Final Report of a Deviation Associated with a Non-compliant Insulated Conductor | 09/06/2024 | ||
Westinghouse Electric Co | Interim Report of a Deviation Associated with Westinghouse-supplied Generation 3 CR-99 and Trident X Control Rod Blades | 09/04/2024 | ||
Browns Ferry Nuclear Plant | Retraction of Interim Report of a Deviation Associated with a Fike Metal Products 16-inch Rupture Disc, Part Number 16-CPV-C | 08/22/2024 | ||
Tennessee Valley Authority | Updated Report of a Deviation Associated with a Valve in the Unit 3 High Pressure Coolant Injection System | 08/22/2024 | ||
RSCC Wire & Cable LLC | Final Report of a Deviation Associated with a Non-compliant Insulated Conductor | 08/23/2024 | ||
Diablo Canyon Power Plant | Interim Report of a Deviation Associated with ALCO Snubber Valve Assemblies Part Number 2402466 | 08/15/2024 | ||
Paragon Energy Solutions | Retraction of Interim Report of a Deviation Associated with a Potential Defect with Schneider Electric Medium Voltage VR Type Circuit Breaker Part Number V5D4133Y000 | 07/27/2024 | ||
Browns Ferry Nuclear Plant | Interim Report of a Deviation Associated with a Fike Metal Products 16-inch Rupture Disc, Part Number 16-CPV-C | 07/25/2024 | ||
RSCC Wire & Cable LLC | Interim Report of a Deviation Associated with a Non-compliant Insulated Conductor | 07/25/2024 | ||
Westinghouse Electric Co | Interim Report of a Deviation Associated with Westinghouse-supplied Generation 3 CR-99 Control Rod Blades | 07/21/2024 | ||
Paragon Energy Solutions | Interim Report of a Deviation Associated with a Potential Defect with Schneider Electric Medium Voltage VR Type Circuit Breaker Part Number V5D4133Y000 | 06/29/2024 | ||
Sequoyah Nuclear Plant | Retraction of Interim Report of a Deviation or Failure to Comply – Transducer Model 8005N | 06/24/2024 | ||
Tennessee Valley Authority | Interim Report of a Deviation Associated with a Valve in the Unit 3 High Pressure Coolant Injection System | 06/23/2024 | ||
Framatome | Interim Report of a Deviation Associated with Burnable Poison Rod Assemblies | 06/22/2024 | ||
Paragon Energy Solutions | Final Report of a Deviation Associated with an Emergency Diesel Generator Voltage Regulator | 06/21/2024 | ||
Flowserve Corp | Interim Report of a Deviation Associated with a ½" 1878 Piston Check Valve with adjustable cracking pressure SN: 96CEE | 06/11/2024 | ||
Paragon Energy Solutions | Interim Report of a Deviation Associated with a Potential Defect with Schneider Electric Medium Voltage VR Type Circuit Breaker Part Number V5D4133Y000 | 05/31/2024 | ||
Diablo Canyon Power Plant, Units 1 and 2 | Interim Report of a Deviation Associated with Emergency Diesel Generator Fuel Snubber Valve Assembly | 05/28/2024 | ||
Paragon Energy Solutions | Interim Report of a Deviation Associated with an Emergency Diesel Generator Voltage Regulator | 05/24/2024 | ||
Ametek Solidstate Controls | Final Report of a Deviation Associated with an Oil Filled Capacitors in Aluminum Case Part Number 07-020139-10 | 05/17/2024 | ||
TE Connectivity | Interim Report of a Deviation Associated with Non-compliant Material Used in the Potting of the Coils for E7000 Series Relays | 04/23/2024 | ||
Paragon Energy Solutions | Interim Report of a Deviation Associated with a Potential Defect with Schneider Electric Medium Voltage VR Type Circuit Breaker Part Number V5D4133Y000 | 05/02/2024 | ||
Global Nuclear Fuel | Part 21 Final Report Notification: GNF3 Spacer Relocation | 04/22/2024 | ||
Sequoyah Nuclear Plant | Interim Report of a Deviation or Failure to Comply – Transducer Model 8005N | 04/25/2024 | ||
Paragon Energy Solutions | Interim Report of a Deviation Associated with a Potential Defect with Schneider Electric Medium Voltage VR Type Circuit Breaker Part Number V5D4133Y000 | 04/16/2024 | ||
Ametek Solidstate Controls | Final Report of a Deviation Associated with an Oil Filled Capacitors in Aluminum Case Part Number 07-020139-10 | 05/17/2024 | ||
Farley Nuclear Plant | 10 CFR Part 21 Report for Siemens Low Voltage AKW Circuit Breaker | 04/15/2024 | ||
Engine Systems Inc | Interim Report of a Deviation Associated with a Leaking Cylinder Liner in Emergency Diesel Generator | 04/12/2024 | ||
Transco Products Inc | Interim Report of a Deviation Associated with Unverified Critical Characteristics of Darmatt KM-1 Flat Board | 04/09/2024 | ||
Xcel Energy / Prairie Island Nuclear Generating Plant | Interim Report of a Potential Deviation or Failure to Comply Associated with Bentley Systems Incorporated AutoPIPE Software (Update) | 04/09/2024 | ||
Diablo Canyon Power Plant | 10 CFR Part 21 Interim Report Regarding Mechanical Snubbers | 04/03/2024 | ||
Cooper Nuclear Station | 10 CFR Part 21 Report Regarding Service Water Booster Pump Bearing Housing Covers | 03/27/2024 | ||
Alpha-Omega Services, Inc | Interim Report of a Deviation Associated with Failure to Comply with Testing Requirements | 03/18/2024 | ||
Cooper Nuclear Station | Interim Report of a Deviation Associated with a Residual Heat Removal Service Water Booster Pump Bearing Housing Cover Oil Leak | 03/01/2024 | ||
Fairbanks Morse | Interim Report of a Deviation Associated with Synchro-Start Mini-Gen Signal Generator, Woodward Part Number (PN) SA-3176-D; Fairbanks Morse PN 16302997 | 02/25/2024 | ||
Fairbanks Morse | Interim Report of a Deviation Associated with Air Start Valve ASCO Part Number (PN) X300529797001HN, Fairbanks Morse PN 11916969 | 02/25/2024 | ||
Tennessee Valley Authority | Final Report of a Deviation Associated with a Crompton Instruments Type 077 Ammeter | 02/22/2024 | ||
Tennessee Valley Authority | Final Report of a Deviation Associated with a Lube Oil Scavenging and Fuel Oil Engine Driven Pump | 02/14/2024 | ||
Xcel Energy / Prairie Island Nuclear Generating Plant | Interim Report of a Deviation Associated with Bentley Systems Incorporated AutoPIPE Software | 02/09/2024 | ||
Ametek Solidstate Controls | Interim Report of a Deviation Associated with an Oil Filled Capacitors in Aluminum Case Part Number 07-020139-10 | 02/09/2024 | ||
VC Summer Nuclear Station | Interim Report of a Deviation Associated with a Manufacturing Defect Affecting a Control Power Circuit Monitor (CP1) Relay on its 'B' Emergency Diesel Generator | 02/07/2024 | ||
VC Summer Nuclear Station | Interim Report of a Deviation Associated with a Manufacturing Defect Affecting a Field Flash Contactor (K2) relay on its 'B' Emergency Diesel Generator | 02/07/2024 | ||
Tioga Pipe, Inc | Final Report of a Deviation Associated with Buttweld 90 Degree Elbows | 02/02/2024 | ||
TVA (Tennessee Valley Authority) | Final Report of a Deviation Associated with Starter Contactors for the BFN Unit 1 High Pressure Coolant Injection Suppression Pool Inboard Suction Valve | 02/01/2024 | ||
Tennessee Valley Authority | Final Report of a Deviation or Failure to Comply Associated with a Relay in the Unit 2 Reactor Core Isolation Cooling Condensate Pump | 01/23/2024 | ||
VC Summer Nuclear Station | Interim Report of a Deviation Associated with Emergency Diesel Generator Fuel Oil Piping | 01/18/2024 | ||
Engine Systems, INC. | Interim Report of a Deviation Associated with an Electro-Motive Diesel (EMD) Cylinder Liner with Bore Deficiency, P/N 9318833 (component of power assembly P/N 40124897) | 01/17/2024 | ||
Paragon Energy Solutions | Final Report of a Deviation Associated with Detroit Diesel/MTU Fuel Injectors PN R5229660 Cat ID# 0001390618 | 01/17/2024 | ||
Browns Ferry Nuclear Plant | Final Report of a Deviation Associated with a Deviation or Failure to Comply Associated with Check Valve 0-CKV-023-0565 for D1 Residual Heat Removal Service Water Pump | 01/16/2024 | ||
VC Summer Nuclear Station | Interim Report of a Deviation Associated with a Manufacturing Defect Affecting a Control Power Circuit Monitor (CP1) Relay on its 'B' Emergency Diesel Generator | 01/10/2024 | ||
VC Summer Nuclear Station | Interim Report of a Deviation Associated with a Manufacturing Defect Affecting a Field Flash Contactor (K2) relay on its 'B' Emergency Diesel Generator | 01/10/2024 | ||
Engine Systems, INC. | Interim Report of a Deviation Associated with an Electro-Motive Diesel (EMD) Cylinder Liner with Bore Deficiency, P/N 9318833 (component of power assembly P/N 40124897), S/N 20M0938. | 01/04/2024 | ||
Tennessee Valley Authority | Interim Report of a Deviation Associated with an Crompton Instruments Type 077 Ammeter | 01/03/2024 | ||
Sequoyah | Final Report of a Deviation Associated with Siemens 6.9kV, 1200A Vacuum Circuit Breaker Defects | 01/10/2024 |
See also:
Page Last Reviewed/Updated Tuesday, September 16, 2025
Page Last Reviewed/Updated Tuesday, September 16, 2025