Event Notification Report for April 22, 2026

EN Revision Imported Date: 4/22/2026

EN Revision Text: FITNESS FOR DUTY

The following information was provided by the licensee via phone and email:

"At 0902 EDT on 4/20/26, it was determined that a supervisor tested positive in accordance with the fitness-for-duty (FFD) testing program. The individual's authorization for site access has been terminated.

The NRC Resident Inspector has been notified."

STEAM GENERATOR TUBE DEGRADATION

The following information was provided by the licensee via phone and email:

"At 1240 EDT on 4/21/2026, with the unit at 100 percent power, it was determined that a tube within the '2B' steam generator did not meet the performance criteria per plant technical specifications. The subject tube was removed from service via plugging during a previous plant shutdown. This event is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72 (b)(3)(ii)(A).

"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified."

PART 21 - MATERIAL DEGRADATION INTERIM REPORT

The following summary was provided by the licensee via email:

Emerson/Fisher Controls International LLC identified a potential deviation on February 17, 2026, involving material certified to ASTM A276 Type 316B cold-finished bar stock. Mechanical property values (tensile and/or yield strength) reported on vendor certifications were found to be below ASTM A276 minimum requirements. The material was procured from the Curtiss-Wright Nuclear Division (Middleburg Heights, OH) under multiple safety-related purchase orders.

Fisher's internal review determined that seven total purchase orders from Curtiss-Wright contained material with sub-minimum strength values. Affected materials were used in plug and stem assembly components, and Fisher has isolated nonconforming items and segregated all remaining 316B inventory.

Fisher notified Curtiss-Wright on February 17, 2026, requesting details on containment, root cause, extent of condition, and corrective actions. Curtiss-Wright later confirmed additional affected orders on March 23, 2026.

Fisher is evaluating whether the reduced mechanical properties could impact fit, form, or function, including stem buckling and structural adequacy analyses. Completion of these evaluations requires customer-specific actuator loads and design conditions. Fisher has not yet determined that the issue constitutes a defect or reportable failure to comply but will provide additional notification if reportability changes.

The evaluation is expected to be completed by May 17, 2026.

Plants that have purchase orders for the potential degraded material include the following: Salem, Brunswick, Sequoyah, Catawba, and Palo Verde

POC:
Catherine Hoeger, Quality Manager
Emerson, Marshalltown Operations
Catherine.Hoeger@Emerson.com
641-387-0901