Event Notification Report for September 17, 2025

AGREEMENT STATE REPORT - LOST SOURCES

The following information was provided by the Illinois Emergency Management Agency (the Agency) via phone and email:

"As a result of an ongoing Agency investigation into unresponsive general licensees, the Agency became aware that two (2) generally licensed gas chromatography devices containing 15 millicuries of Ni-63 are missing.
"Reportedly, on or about February 2023, Morton Grove Pharmaceuticals (Morton Grove, IL) ceased operations and improperly auctioned the two generally licensed devices, along with all other assets.
"The licensee failed to properly transfer or dispose of the devices, two Agilent Technologies model G23974 (s/n U10800 and s/n U12506). Agency inspectors conducted a site investigation on August 27, 2025, and confirmed no lab equipment is on site.
"The quantity of radioactive material involved, while unlikely to be dangerous to the public, is reportable within 30 days to the Agency and the U.S. NRC. Efforts to identify the buyers of the devices through the auction company have been unproductive and, absent additional information, the investigation is closed."

Illinois item number: IL250035

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 - LOST I-125 SEED

The following information was received from the Massachusetts Radiation Control Program (the Agency) via email:

"On August 11, 2025, three radioactive iodine-125 sealed sources (seeds) were removed from a patient receiving a radioactive seed localization procedure. The licensee expected to remove four I-125 seeds, which were placed in the patient on August 8, 2025, but only located three of the seeds.
"The missing seed was not located after extensive surveys of the patient, staff, and all areas where the seed may have been misplaced. The seed has not been located at this time.
"This is a 30-day reporting requirement per [Code of Massachusetts Regulations] 105 CMR 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."

Manufacturer: IsoAid, LLC
Model: IAI-125A
Source: 0.181 mCi I-125

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 - LOST EXIT SIGNS

The following is a summary of information provided by the Colorado Department of Public Health and Environmental (the Department) via email.

The Department received a notification from LDS Church that seventeen (17) exit signs, each with 14.5 Ci of tritium were lost in Woodland Park, Colorado.

Manufacturer: SRB Technologies
Model Number: BXU20BS

Colorado Event Report ID Number: CO250025

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 - LOST EXIT SIGNS

The following is a summary of information provided by the Colorado Department of Public Health and Environmental (the Department) via email:

The Department received a notification from the licensee that eight (8) exit signs, containing a total of 65.65 Ci of tritium were lost in Denver, Colorado.

Manufacturer: SRB Technologies & Isolite Corporation
Model Number: BXU10GS (1 sign), BR-10-BK (2 signs), BRU10S (2 signs), BETALUX (3 signs).

Activities:
Models - BXU10GS & BR-10-BK: 9.21 Ci each
Model - BRU10S: 7.76 Ci each
Model - BETALUX: 7.5 Ci each

Event Report ID No.: CO250026


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 - LOST EXIT SIGN

The following is a summary of information provided by the Colorado Department of Public Health and Environmental (the Department) via email:

The Department received a notification from the licensee that one (1) exit sign containing 10 Ci of tritium was lost in Meeker, Colorado.

Manufacturer: Isolite Corporation
Model Number: SLX60
Isotope: H-3
Activity: 10 Ci

Event Report ID No.: CO250027

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

MANUAL REACTOR TRIP

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

"At 2020 CDT [on 9/14/2025], [Comanche Peak] Unit 2 reactor was manually tripped due to a malfunction of the electro-hydraulic control (EHC) system on the main turbine. All auxiliary feedwater pumps started due to steam generator `Lo-Lo' levels post trip. This event is being reported in accordance with 10 CFR 50.72(b)(2)(iv)(B) for a reactor trip and 10 CFR 50.72(b)(3)(iv)(A) for an actuation of auxiliary feedwater. Unit 2 is being maintained in hot standby (mode 3) in accordance with integrated plant operating procedures. Decay heat is being rejected to the main condenser via the steam dump valves."

The NRC Resident Inspector was notified.

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

Unit 1 was not affected. The cause of the malfunction of EHC is unknown and under investigation. All rods fully inserted upon the reactor being tripped.

TECHNICAL SPECIFICATION REQUIRED REPORT

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

"A reportable occurrence [was] identified on September 15, 2025, for a failure to implement administrative controls. Per technical specification 6.2(b).4, the facility reactor safeguards committee (RSC) shall determine whether changes in the facility as described in the safety analysis report (SAR) may be accomplished in accordance with 10 CFR 50.59, without obtaining prior NRC approval via license amendment pursuant to 10 CFR 50.90. On September 10, 2025, changes to the normal and emergency electrical power systems described in the SAR were made without completing a review and acquiring RSC approval for the change.

"The reactor is and will remain shutdown until review and approval by the RSC of corrective actions is completed in accordance with Technical Specifications.

"A written report will be submitted within ten days summarizing the reportable occurrence."

AGREEMENT STATE REPORT - FOUND DENSITY GAUGE

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

"On September 11, 2025, at 0412 CDT, the Agency received a notification from the Austin Fire Department that it had recovered a Humboldt 5001EZ moisture density gauge. The gauge contained a 40 Am-241:Be sealed source and a 10 millicurie cesium-137 source and had reportedly been found by a member of the public at a convenience store, who immediately contacted the fire department. The fire department provided contact details retrieved from the transport case which showed that the gauge is owned by the licensee who is based in San Antonio, Texas.

"The Agency then contacted the radiation safety officer (RSO) who confirmed that the gauge had been checked out by a technician between 0230 - 0245. The technician was unaware that the gauge was missing until they were informed that the gauge had been recovered and was in the possession of the RSO. The technician believes the gauge may have fallen out of the truck during transport because the tailgate had not been secured. When the gauge was recovered, both locks on the transport container were still intact. There is no risk of exposure to any members of the public because of this event. Additional information will be provided in accordance with SA - 300 reporting."


Texas Incident #: 10226
Texas NMED # TX250045

EN Revision Imported Date: 9/18/2025

EN Revision Text: BOTH TRAINS OF CENTRIFUGAL CHARGING SYSTEM INOPERABLE

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

"On September 11, 2025, Callaway was performing a planned maintenance window causing the 'B' train emergency diesel generator and the 'B' train essential service water system to be inoperable. At 0255 CDT the 'A' train centrifugal charging pump was declared inoperable due to an unexpected loss of control room indication for the 'A' train centrifugal charging pump miniflow valve.

"Therefore, both trains of the centrifugal charging (high head injection) system were simultaneously inoperable. This condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(D). A fuse was replaced on the 'A' train centrifugal charging pump miniflow valve breaker, restoring operability of that system at 0500.

"There was no impact on the health and safety of the public or plant personnel.

"The NRC Resident Inspector has been notified."

* * * RETRACTION ON 9/17/2025 AT 1747 EDT FROM ZACHARY MILLIGAN TO KAREN COTTON * * *

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

"Event Notification (EN) 57919, made on 09/11/25, pursuant to 10 CFR 50.72(b)(3)(v)(D), is being retracted based on further review of the timing of when the 'B' train essential service water (ESW) system was operable and capable of performing its support function for the 'B' train centrifugal charge pump (CCP).

"Further review of restoration procedures/processes determined that the 'B' train ESW system was operable by 0232 CDT on 9/11/25, which was prior to the loss of the 'A' train CCP mini-flow valve (0255 on 09/11/25). Thus, the 10 CFR 50.72(b)(3)(v)(D) reporting criterion was not met.

"The NRC Resident Inspector has been notified of this retraction."

Notified R4DO (Agrawal)

AGREEMENT STATE REPORT - DAMAGED PORTABLE MOISTURE DENSITY GAUGE

The following information was provided by the Virginia Department of Health, Office of Radiologic Health (RMP) via email:

"On September 10, 2025, at approximately 1500 EDT, RMP was notified of an incident involving damage to a portable nuclear gauge.

"Earlier, at approximately 1230, a Troxler Model 4640 B portable nuclear moisture density gauge, containing 9 mCi Cs-137, (SN #2256) was struck by a roller on a paving site at Westmoreland, VA. The authorized user notified the radiation safety officer (RSO) who went to the site to evaluate the gauge condition, and he notified RMP.

"Per the RSO, the gauge was clipped on the side by a CB-13 roller during the construction of a roller pattern and control strip. There was damage to the gauge cover and one battery pack. The source rod was not out when it was struck. There is no apparent [damage] to the source or the capsule. The gauge was surveyed onsite using with a TroxAlert 3105 (#64502) [meter] and readings were within acceptable ranges. The gauge was placed in its transport case and returned to the licensee's storage facility to be leak tested. Then the gauge will be sent to Troxler for evaluation.

"The Radioactive Materials Program will follow up with an investigation."

Event Report ID No.: VA250003

AGREEMENT STATE REPORT - EQUIPMENT FAILURE

The following information was provided by the Wisconsin Department of Health Services Radiation Protection Section (the Department) via email:

"On September 11, 2025, at 1306 CDT, the Department received a telephone notification that the licensee's Jubilant DraxImage Inc. RUBY-FILL Rb-82 generator (Serial Number: GLO03160183) was unable to deliver a patient dose at approximately 1000 CDT on September 11, 2025.

"The device provided an error during the infusion stating that the dosage could not be delivered to the patient. The generator stated that 0.2 millicuries of Rb-82 was delivered to the patient out of an intended 20 millicuries. At approximately 1300 CDT on the same day, the licensee completed the daily quality control tests on the generator and simulated a patient infusion with a shielded vial. The device delivered the intended dosage to the vial and appears to be in working order. The licensee has a scheduled visit with the manufacturer the week of September 15-19, 2025, to evaluate the cause of failure. No contamination resulted from the incident."

Event Report ID No.: WI250012