Event Notification Report for January 30, 2026

PART 21 - DEFECT WITH ELECTRIC ACTUATORS

The following is a summary of information provided by Paragon Energy Solutions, LLC via email:

Tennessee Valley Authority (TVA) experienced binding in several actuators (Schneider Electric part number MA-418-0-0-4) used to operate dampers associated with emergency diesel generator room ventilation. Paragon identified that precipitate particles from the lubricating oil can collect in the space between the small motor rotor and the stator thus preventing rotation of the shaft connected to the damper actuating linkage. This condition, if left uncorrected, could contribute to a safety hazard.
Paragon is working with TVA to define the extent of the condition and recommends Watts Bar segregate any spare actuators from the lots and monitor in service MA-418 actuator motors from different lots supplied for similar issues.

Paragon contact: Richard Knott, Vice President Quality Assurance, Paragon Energy Solutions, LLC, 7410 Pebble Drive, Fort Worth, TX 76118, 817-284-0077, rknott@paragones.com.

Affected plant: Watts Bar

AGREEMENT STATE REPORT - STUCK SOURCE

The following information was provided by the South Carolina Department of Environmental Services (the Department) via phone and email:

"The licensee informed the Department via telephone on January 23, 2026, that a fixed gauging device was disabled or failed to function as designed. The licensee reported that a sealed source was stuck (exposed) in a dip tube assembly that was attached to a process vessel. The licensee reported that a representative from a licensed service provider was on-site and was able to remove the sealed source from the dip tube assembly, and placed the sealed source into a transport shield. The sealed source is a 9 millicurie cobalt-60 Berthold model P2608-100 sealed source. The licensee did not report any overexposures or ongoing health/safety concerns. This event is still under investigation by the Department."