Event Notification Report for June 08, 2026

EN Revision Imported Date: 6/8/2026

EN Revision Text: PART 21 REPORT - NON-COMPLIANT INSULATED CONDUCTOR

* * * This is not a new Part 21 condition. This EN will document all updates for this Part 21 condition, originally documented in EN 57243 and described below, that are made after November 2025. Refer to EN 57243 for updates made after the initial notification through November 2025. * * *

The following is a synopsis of information received via fax:

A reel of insulated conductor was found non-compliant due to failure of insulation tensile and elongation at break test following air oven aging. Wire from the non-compliant reel was delivered to nine plants.
Affected plants: Wolf Creek, Dresden, LaSalle, Limerick, Peach Bottom, Arkansas Nuclear One, Waterford, Susquehanna, and Davis Besse.

Reporting company point of contact:
RSCC Wire and Cable LLC
dba Marmon Industrial Energy and Infrastructure
20 Bradley Park Road
East Granby, CT 06026

Phillip Sargenski - Quality Assurance Manager
Phone: 860-653-8376
Fax: 860-653-8301
Phillip.sargenski@marmoniei.com

* * * UPDATE ON 12/04/2025 AT 1602 EST FROM CAROL GROSSO TO KERBY SCALES * * *

The vendor provided an update on their ongoing evaluation. The vendor continues to receive product from their customers to perform testing and evaluations. Test results for completed testing have been forwarded to customers. The process is still ongoing.

Notified R1DO (Schussler), R3DO (Hills), R4DO (Deese), and Part 21 group via email.

* * * UPDATE ON 01/12/2026 AT 1351 EST FROM CAROL GROSSO TO BRIAN P. SMITH * * *

The vendor provided an update on their ongoing evaluation. The vendor continues to receive product from their customers to perform testing and evaluations. Test results for completed testing have been forwarded to customers. The process is still ongoing.

Notified R1DO (Schussler), R3DO (Feliz-Adorno), R4DO (Dixon), and Part 21 group via email.

* * * UPDATE ON 02/05/2026 AT 1313 EST FROM CAROL GROSSO TO ERNEST WEST * * *

The following information was provided by the licensee via email:

"RSCC is awaiting samples from customers to complete our evaluation. As such, the evaluation is ongoing. To date, there has been no issues with the product we've received and tested. Test results have been forwarded to customers who have provided samples. We will continue this evaluation until all samples have been provided and we complete our testing."

Notified R1DO (Bickett), R3DO (Nguyen), R4DO (O'Keefe), and Part 21 group via email.

* * * UPDATE ON 03/06/2026 AT 1239 EST FROM CAROL GROSSO TO JOSUE RAMIREZ * * *

The following information was provided by the licensee via email:

"RSCC is still awaiting samples from customers required to complete RSCC's verification testing. Therefore, the evaluation is ongoing. To date, there has been no issues with the product that have been received and tested. Test results have been forwarded to customers who have provided samples. RSCC will continue this evaluation until all samples have been provided and testing has been completed."

Notified R1DO (Eve), R3DO (Edwards), R4DO (Dixon), and Part 21 group via email.

* * * UPDATE ON 04/07/2026 AT 1310 EDT FROM CAROL GROSSO TO TENISHA MEADOWS * * *

The following information was provided by the licensee via email:

"RSCC is still awaiting samples from customers required to complete our verification testing. Therefore, the evaluation is ongoing. To date, there has been no issues with the product that have been received and tested. Test results have been forwarded to customers who have provided samples. RSCC will continue this evaluation until all samples have been sent to the facility for testing and the results will be forwarded to each customer."

Notified R1DO (Dentel), R3DO (Stoedter), R4DO (Bloodgood), and Part 21 group via email.

* * * UPDATE ON 05/07/2026 AT 0930 FROM CAROL GROSSO TO KAREN COTTON * * *

The following information was provided by the licensee via email:

"The evaluation and verification testing is still ongoing. The company is awaiting samples from the remaining customers to conclude this activity. To date, there have been no issues with the products that have been received and tested. Test results have been forwarded to customers who have provided samples. The company will continue this evaluation until all samples have been sent to the company's facility for testing and the results forwarded to each customer."

Notified R1DO (Lilliendahl), R3DO (Stoedter), R4DO (Agrawal), and Part 21 group via email.

* * * UPDATE ON 06/05/2026 AT 1318 EDT FROM CAROL GROSSO TO BETHANY CECERE * * *

The following information was provided by the licensee via email:

"The evaluation and verification testing is still ongoing. To date, there has been no issues with the product we've received and tested. Test results have been forwarded to customers. We will continue this evaluation until everything is resolved."

Notified R1DO (Lilliendahl), R3DO (Zurawski), R4DO (Bloodgood), and Part 21 group via email.

AGREEMENT STATE REPORT - FOUND SOURCE

The following information was provided by the Louisiana Department of Environmental Quality (the Department) via email:

"Scrap metal from Big Cajun 2 [a coal power plant in] New Roads, Louisiana was sent to Louisiana Scrap Metal located in Port Allen, Louisiana, on Tuesday, May 26, 2026. It was reported to the Department on May 29, 2026, that the metal scrap was surveyed and a device with thorium was detected. The vendor was called out and surveyed the device which indicated a radiation reading of 20 microroentgen per hour at the surface. The vendor did not indicate that the device was leaking from a wipe test. The device was secured at Louisiana Scrap Metal. Big Cajun 2 is currently trying to determine where to send this device for disposal.

"The presumption at this time is the device was a gas meter manufactured by General Electric. The source was thorium, but the make, model, serial number, or activity of the source is not known at this time. The device was not on the radioactive material license, and the assumption is that it is a general license device until more information can be ascertained."

Louisiana Event Report Number: LA20260008

AGREEMENT STATE REPORT - LEAKING SOURCE

The following information was provided by the Washington Office of Radiation Protection via email:

"A leaking source was encountered while inspecting a gas chromatograph that had been in storage. It was visually apparent that the source housing was damaged. A soldered joint in the steel housing failed within the gas chromatograph and resulted in a mechanical failure.

"The area was controlled, and surveys were taken of the source and proximate area. Surveys of the source were counted, and contamination above reportable quantities was found on the source body. No loose surface contamination was found. The leaking source was properly secured. The source was a Ni-63 source, serial number: 1350, with an 8.26 mCi total activity. The source holder was a Shimadzu GC-14A gas chromatograph. The Washington State Department of Health will verify that corrective actions have been appropriately implemented during the next routine inspection that is performed."

Washington Event Number: WA-26-007

TECHNICAL SPECIFICATION REQUIRED SHUTDOWN

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

"On June 4, 2026, at 1535 EDT, a technical specification (TS) required shutdown was initiated at Millstone Unit 2. TS 3.1.3.1 action 'A' was entered at 1234 EDT with a required action to reduce thermal power to less than 70 percent of the maximum allowable thermal power within 1 hour and restore control element assembly misalignment within 2 hours. This required action was not completed within the completion time, therefore, a TS required shutdown was initiated and this event is being reported as a four-hour, non-emergency notification per 10 CFR 50.72(b)(2)(i).

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

"There has been no impact to Unit 3, which remains at 100 percent power."

AGREEMENT STATE REPORT - LOST SOURCE

The following information was provided by the Massachusetts Radiation Control Program (the Agency) via email:

"On May 29, 2026, the licensee reported that a device containing a generally licensed sealed source had gone missing on May 4, 2026. The device is an electron capture device containing a Ni-63 source.

Device Manufacturer: Agilent Technologies
Model Number: G2397-65506
Serial Number: U20228
Radionuclide: Ni-63
Activity: 15 mCi

"The reporting requirement is within 30 days in accordance with 105 CMR (Code of Massachusetts Regulations) 120.281(A)(2), missing licensed radioactive materials in aggregate quantity equal to or greater than 10 times quantity specified in 105 CMR 120.297, Appendix C. The Agency considers this event to be open."

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