Event Notification Report for November 14, 2025

EN Revision Imported Date: 11/14/2025

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

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 08/23/24 AT 1315 EDT FROM PHILLIP SARGENSKI TO JOSUE RAMIREZ * * *

The vendor provided the final report for this event listing corrective actions and the estimated completion dates.
Notified R1DO (Lilliendahl), R3DO (Skokowski), R4DO (Vossmar), and Part 21 group (Email).

* * * UPDATE ON 09/04/24 AT 1044 EDT FROM PHILLIP SARGENSKI TO NESTOR MAKRIS * * *

The vendor notified the NRC that they plan to send additional finding data regarding this notification via fax and/or email within the next day or two.
Notified R1DO (Ferdas), R3DO (Hills), R4DO (Drake), and Part 21 group (Email).

* * * UPDATE ON 09/06/24 AT 1327 EDT FROM PHILLIP SARGENSKI TO ADAM KOZIOL * * *

The vendor identified an additional non-compliant shipment of insulated conductor.
Affected plant: Calvert Cliffs
Notified R1DO (Ferdas), R3DO (Hills), R4DO (Drake), and Part 21 group (Email).

* * * UPDATE ON 9/17/24 AT 1641 EDT FROM PHILLIP SARGENSKI TO ROBERT THOMPSON * * *

The vendor identified an additional non-compliant shipment of insulated conductor.
Affected customer: Curtiss-Wright Nuclear Division.
Notified R1DO (Werkheiser), R3DO (Ziolkowski), R4DO (Azua), and Part 21 group (Email).

* * * UPDATE ON 9/26/24 AT 1030 EDT FROM PHILLIP SARGENSKI TO ADAM KOZIOL * * *

The vendor is continuing to conduct inventory sampling which involves a 14 day aging test. Due to the length of testing, the vendor plans on submitting their final report the week of October 7, 2024.
Notified R1DO (Dimitriadis), R3DO (Havertape), R4DO (Young), and Part 21 group (Email).

* * * UPDATE ON 10/28/24 AT 1121 EDT FROM PHILLIP SARGENSKI TO BRIAN P. SMITH * * *

The vendor has decided to expand the scope and breadth of the review to ensure they have identified and corrected for the full extent of the matter. Additional time is needed to complete this review.
Notified R1DO (Eve), R3DO (Edwards), R4DO (Warnick), and Part 21 group (Email).

* * * UPDATE ON 02/13/25 AT 1125 EDT FROM CAROL GROSSO TO IAN HOWARD * * *

The vendor has decided to expand the scope and breadth of the review to ensure they have identified and corrected for the full extent of the matter. RSCC is reviewing shipments from the past 18 months to ensure it has accounted for all non-conforming products. Additional cables related to this scope have been identified and impacted customers have been notified.

***UPDATE ON 03/28/2025 AT 1039 EDT FROM CAROL GROSSO TO RODNEY CLAGG***

The vendor has identified cable(s) that could be affected and have advised customers of the issue and requested that samples be returned to the vendor facility for further verification testing, which is a process that remains ongoing. This testing will confirm the cable's safety related function. Once the testing is complete, the vendor will notify the NRC with an updated and final Part 21 report.

Notified R1DO (Arner), R3DO (Gilliam), R4DO (Deese), and Part 21 group (Email).

* * * UPDATE ON 05/06/2025 AT 0935 EDT FROM CAROL GROSSO TO JOSUE RAMIREZ * * *

The vendor provided an update on their ongoing evaluation. The vendor continues to receive product from their customers and perform their evaluations. The process is still ongoing.

Notified R1DO (Eve), R3DO (Ruiz), R4DO (Dodson), and Part 21 group (Email).

***UPDATE ON 06/03/2025 AT 1605 EDT FROM CAROL GROSSO TO ERNEST WEST***

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

Notified R1DO (Dimitriadis), R3DO (Orlikowski), R4DO (Dodson), and Part 21 group (Email).

* * * UPDATE ON 07/02/2025 AT 1634 EDT FROM CAROL GROSSO TO TENISHA MEADOWS * * *

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

Notified R1DO (Carfang), R3DO (Havertape), R4DO (Warnick), and Part 21 group (Email).


* * * UPDATE ON 09/09/2025 AT 1637 EDT FROM CAROL GROSSO TO JOSUE RAMIREZ * * *

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 (Ford), R3DO (Sanchez Santiago), R4DO (Deese), and Part 21 group (Email).

* * * UPDATE ON 10/01/2025 AT 1815 EDT FROM CAROL GROSSO TO JORDAN WINGATE* * *

The vendor provided an update on their ongoing evaluation. The vendor continues to work with customers requesting product be returned for evaluation testing. Test results for completed testing have been forwarded to customers. The process is still ongoing.

Notified R1DO (Warnek), R3DO (Ziolkowski), R4DO (Vossmar), and Part 21 group (Email).

* * * UPDATE ON 11/13/2025 AT 1228 EST FROM CAROL GROSSO TO ROBERT THOMPSON * * *

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 (Lilliendahl), R3DO (Ziolkowski), R4DO (Vossmar), and Part 21 group (Email).

AGREEMENT STATE REPORT - MEDICAL EVENT

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

"On November 6, 2025, the Department received a report from the licensee's radiation safety officer (RSO) stating that they had discovered three under exposure events had occurred using Y-90 TheraSphere beads. The events were discovered during a review of these procedures conducted by a new manager. The events occurred on September 11, [September] 18, and [September] 22, 2025.

"In the September 11 event, the patient was prescribed to receive 34.3 millicuries (mCi) but only received 20.0 mCi. In the September 18 event, the patient was prescribed two separate procedures of 34.3 and 48.9 mCi, but received 23.6 and 31.8 mCi [respectively]. In the September 22 event, the patient was prescribed 35.7 mCi but received 26.4 mCi. The final dose calculations were based on the recorded radiation readings taken on the delivery devices after the procedures.

"The RSO stated they have reviewed the records for the events and interviewed the individual who had taken the after-procedure radiation readings and was not able to determine the cause of the underexposures. The prescribing physicians in each case have been notified of the error. The patients will be notified by their physician of the events. The RSO stated they are continuing to investigate the cause of the under exposures. The RSO stated they do not expect any adverse effects on the patients. Additional information will be provided as it is received in accordance with SA-300."

Texas Incident #: 10242
Texas NMED # TX250058

A Medical Event may indicate potential problems in a medical facility's use of radioactive materials. It does not necessarily result in harm to the patient.

AGREEMENT STATE REPORT - DAMAGED GAUGE

The following is a summary of information provided by the Virginia Radioactive Materials Program (VRMP) via email:

The VRMP was notified by phone of an incident at a soil compaction project site in Wytheville, VA. At approximately 1120 EST, on November 6, 2025, a Troxler 3440 portable nuclear gauge (S/N 71116, 8 mCi Cs-137 and 40 mCi Am-241) was struck by a motor grader while the rod was locked in the safe position within the gauge. The authorized user (AU) was approximately 100 yards from the unattended gauge when the incident occurred. The AU secured the area and contacted their radiation safety officer (RSO) to report the incident. The impact damaged the plastic housing, bent the source rod handle, and broke the depth rod off the device. The licensee and Virginia Department of Transportation (VDOT) RSOs verified the source rod was still locked within the gauge shielding and there was no apparent damage to either source capsules. Surveys indicated the radiation levels were within acceptable ranges. The licensee RSO reported that there were no exposures or injuries. Surveys of the surrounding area and grader tires showed only background radioactivity. The gauge was placed into its transport case and returned to the licensed storage location. A leak test will be performed, and the gauge will be transported to North East Technical Services, Inc., a licensed nuclear gauge service company in Maryland, for further evaluation. VRMP will investigate the licensee.

Virginia event report ID number: VA250005

AGREEMENT STATE REPORT - STUCK OPEN SHUTTER

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

"On November 7, 2025, the Department was notified by the licensee's radiation safety officer that while removing a Berthold model LB7440 gauge for disposal, the shutter was found in the stuck open position. Open is the normal position for the shutter. The gauge contains a 10 millicurie (original activity) cesium-137 source. A shield was attached to the front of the gauge, and it was placed in a shipping drum full of shielding materials. The gauge was transferred to a storage area. The gauge will be shipped for disposal. No individual received any significant exposure due to this event. Additional information will be provided as it is received in accordance with SA-300."

Texas incident number: 10243
Texas NMED number: TX250059

AGREEMENT STATE REPORT - RECOVERED GAUGE

The following information was provided by the Colorado Department of Health (the Department) via email:

"A gauge service provider reported that a member of the public had contacted them after finding an uncontrolled portable nuclear gauge. The individual observed the gauge fall from the back of a truck and called the service provider's number displayed on the gauge transportation case. The member of the public indicated that the transport case appeared to be intact. By the time the member of the public was contacted [by the Department], the licensee had already recovered the gauge. The Department contacted the licensee who confirmed that the gauge involved was a Troxler model 3440, serial number 24768, containing approximately 9 mCi of Cs-137 and 44 mCi of Am-241/Be.

"An investigation is ongoing, and the Department is awaiting additional information from the licensee."

Colorado event report ID number: CO250041

ACTUATION OF AUXILIARY FEEDWATER SYSTEM

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

"At 0748 CST, on November 12, 2025, Callaway Plant experienced an automatic actuation of the auxiliary feedwater (AFW) system in response to auxiliary feedwater actuation signals (AFAS). A low suction pressure signal was also received which aligned the AFW pumps to essential service water (ESW). An unknown amount of water from the ultimate heat sink (UHS) entered the steam generators, necessitating a plant shutdown due to exceeding secondary water chemistry program action levels. During the shutdown, with the plant at approximately 28 percent power, high vibration was received on the main turbine, requiring a manual turbine trip. The cause of the AFAS is not yet known. The plant is currently stable in mode 3.

"This condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(iv)(A).

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

The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:

Decay heat is being removed via steam dump valves to the main condenser.

HIGH PRESSURE COOLANT INJECTION INOPERABLE

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

"On November 12, 2025, at approximately 1250 EST, during surveillance testing of the high-pressure coolant injection (HPCI) system the HPCI minimum flow valve (E4150F012) would not open during stroke testing. HPCI had been removed from service for quarterly surveillance testing at 0957, November 12, 2025. The unplanned inoperability condition began at 1250 when a stroke time test was attempted, and the valve did not reposition. Since HPCI is a single-train safety system, this meets the criterion for event notification per 10CFR50.72(b)(3)(v)(D) as a condition that, at the time of discovery, could have prevented the fulfillment of a safety function needed to mitigate the consequences of an accident, based on loss of a single train safety system. Reactor core isolation cooling was and has remained operable. The Senior NRC Resident Inspector has been notified. The failure is currently under investigation."

The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:

Limiting conditions for operation 3.5.1 and 3.6.1.3 were entered to address HPCI inoperable. The site remains on normal offsite power, and all emergency diesel generators remain available.