Event Notification Report for May 18, 2026

EN Revision Imported Date: 5/18/2026

EN Revision Text: 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


* * * UPDATE ON 05/15/2026 AT 1551 EDT FROM BARRY HURST TO ERNEST WEST * * *

The following is a synopsis of information received from an updated Part 21 report:

Fisher conducted tensile and yield strength tests on the components with actual tensile and/or yield strength values falling below the ASTM A276 minimum certification requirements for ASTM A276 Type 316B cold finished material. All other mechanical test results were confirmed acceptable.

Fisher completed an engineering evaluation and determined that this condition does not represent a substantial safety hazard. The supplied material continues to meet or exceed the required design strength for the applicable shipped valve and actuator configurations, and no adverse impact to form, fit, function, operability, or safety-related performance was identified.

No additional affected purchase orders or customers were identified in the update.

Fisher will work directly with the customers regarding any concerns or resolving any issues associated with these components.

If there are any technical questions or concerns, please contact:

Catherine Hoeger
Quality Manager
Emerson Automation Solutions
Fisher Controls International LLC
Phone (641) 754-3210
catherine.hoeger@emerson.com

Notified R1DO (Bickett), R2DO (Taylor), R4DO (Drake), and Part 21/50.55 Reactors (email).

MISSING GAUGE

The following information was provided by the licensee via phone:

During a routine audit, it was discovered that a CPN moisture density gauge was missing. The licensee contacted their alternate storage sites and work sites and performed searches for the missing gauge. The gauge was then declared missing. Searches have been suspended pending further direction from the Radiation Safety Officer.

Gauge information:
Model: MC1-DPR
Serial number: 10400193
Sources: 10 mCi Cs-137, 50 mCi Am-241/Be

THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL

Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf

LOST EXIT SIGNS

The following information was provided by the licensee via phone:

The licensee reported three exit signs, manufactured by SRB Technologies and each nominally containing 50 Ci of tritium, were lost in Indianapolis, IN. The loss was discovered during an inventory of exit signs performed on April 22, 2026.

THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL

Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf

AGREEMENT STATE REPORT - STOLEN MOISTURE DENSITY GAUGE

The following information was provided by the Texas Department of State Health Services (the Department) via phone and email:

"On May 11, 2026, at 1630 CDT, the Department was notified by the licensee that an InstroTek model 3500 moisture density gauge was stolen from their pickup truck. The gauge contained a 10 mCi Cs-137 source and a 40 mCi Am-241/Be source. The theft was reported to the Dallas Police Department. The source handle was secured with a lock. There is no immediate threat to the public.

"Additional information will be reported in accordance with SA 300 requirements."

Texas incident number: 10288

THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL

Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf

FITNESS FOR DUTY

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

"At 0906 CDT on 05/15/2026, it was determined that a non-licensed supervisor tested positive in accordance with the fitness for duty testing program. The individual's authorization for site access has been terminated. The NRC Resident Inspector has been notified."