ML26029A103
| ML26029A103 | |
| Person / Time | |
|---|---|
| Site: | Watts Bar  |
| Issue date: | 01/28/2026 |
| From: | Knott R Paragon Energy Solutions |
| To: | Hoc H Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| EN 58135 | |
| Download: ML26029A103 (0) | |
Text
1 Hoc, HOO X From:
Richard Knott <RKnott@ParagonES.com>
Sent:
Wednesday, January 28, 2026 17:01 To:
Hoc, HOO X Cc:
Douglas VanTassell; Kenny Morrison
Subject:
[External_Sender] 10CFR Part 21 Initial Notification Attachments:
ATT00001.txt; P21-01282026-IN Rev 0 NRC Initial Notification (002).pdf Good afternoon, Please see attached initial report provided per 10CFR Part 21 section 21.21(d)(3)(i).
I confirm that no proprietary, legally privileged, and/or confidential information is included in the attached notification.
Please contact me if you have any questions or concerns.
Best Regards, Richard Richard Knott Vice President, Quality Assurance (518)450-9706 (C) l www.ParagonES.com The linked image cannot be displayed. The file may have been moved, renamed, or deleted. Verify that the link points to the correct file and location.
Confidentiality Note: The information contained in this message (and attachments) is confidential and may be legally privileged. The message is intended solely for the addressee(s). If you are not the intended recipient, you are hereby notified that any use, dissemination, or reproduction is strictly prohibited and may be unlawful. If you are not the intended recipient please contact the sender by return e-mail and destroy all copies of the original message and attachments.
Paragon Energy Solutions, LLC 7410 Pebble Drive
- Fort Worth, Texas
- 76118 817-284-0077
- Fax 817-590-0484 Date: 1/28/2026 To:
Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555 10CFR Part 21 Initial Notification: P21-01282026, Rev. 0
Subject:
Defect with Schneider Electric Actuator Part Number MA-418-0-0-4 Paragon has identified a defect in the subject motor actuator supplied as identified below.
Plant Client PO#
Item ID#
Paragon Project #
Serial #
QTY TVA Watts Bar 3026710 BRK393H 1701330 AN-1721B3363, 3365, 3366, 4563, 4567, 4568, 4573, 4583, 5711, 5713, 5723, 5726, 5734, 5735, 5736, 5754, 5756, 5758 18 1738505 16T0380 AN-1608B1001, 1014 2
2493574 1600442 AN-1641B5767, 5778 AN-1631B3136, 3205, 3208, 3209, 3213, 3215, 3216, 3223, 3225, 3226, 3227, 3226 14 3587300 1800286 AN-1802B2208, 2217, 2212, 2213, 2243, 3256, 3301, 3307 8
6771607 21000499 AN-2104B2583, 2584, 2585, AN-2101B2705 4
7047799 21001224 Paragon SN 00923-01-00001 thru 00004 4
7719737 25000164 Paragon SN 033376-01-00001 thru 00016 16 Pursuant to 10CFR Part 21 § 21.21(d)(3)(i) Paragon is providing initial notification of a defect associated with the Schneider Electric Actuator as supplied in the table above. Similar actuators manufactured by Barber Coleman prior to Schneider Electric acquiring this product line are not in scope. TVA experienced binding in several actuators used to operate dampers associated with Emergency Diesel Generator Room Ventilation. Paragon conducted detailed failure analysis which identified precipitate particles (boron and potassium) from the lubricating oil can collect in the space between the small motor rotor and stator thus preventing rotation of the shaft connected to the damper actuating linkage. To date, Paragon has only confirmed this failure mode on some of the actuators (date code AN-1721 - 21st week of 2017) but based on the discovery, there is potential that additional actuator motors supplied in the table above may be affected. This condition, if left uncorrected, could contribute to a safety hazard and is reportable in accordance with 10CFR Part 21.
Date of Discovery: January 23, 2026 Reportability Determined: January 26, 2026 Paragon has entered this condition in our corrective action program and is working with TVA to define the extent of condition. Paragon is working with the OEM to gather additional information to determine if similar failures of these actuators have been reported from other sources. Paragon also reviewed extensive industry operating
P21-01282026-01 Rev 0 Page 2 of 2 experience with these damper motor actuators recorded since the early 1990s and did not identify any failures attributed to breakdown of the internal lubricating oil. Paragon recommends Watts Bar segregate any spare actuators from the lots above and monitor in service MA-418 actuator motors from different lots supplied for similar issues. Report any deficiencies to Paragon for evaluation.
Sincerely, Richard Knott Vice President Quality Assurance Paragon Energy Solutions, LLC.