Event Notification Report for October 29, 2025

FITNESS FOR DUTY EVENT - PROGRAMMATIC FAILURE

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

"At 0815 CDT, on October 29, 2025, fitness-for-duty (FFD) program administrators identified that a contract employee, who was required to be part of the FFD program random testing pool, had been inadvertently removed from the pool on October 20, 2025. The employee's protected area access has been placed on hold in accordance with the station process. The issue has been placed into the site corrective action program for further review and evaluation to determine the cause. This event notification is being made in accordance with 10 CFR 26.719(b)(4).

"The NRC Resident Inspector has been notified."

AGREEMENT STATE REPORT - STOLEN GAUGE

The following information was provided by the California Department of Public Health, Radiologic Health Branch (the Department) via email:

"On October 29, 2025, a radiation safety officer (RSO) for Tetra Tech BAS, Inc. contacted the Department about a moisture density gauge that was stolen from a temporary storage unit. The gauge was a CPN Model MC-3, S/N M39068922 (10 mCi nominal of Cs-137 and 50 mCi nominal of Am:Be-241). The gauge was stored in a Conex box located at a construction site in San Juan Capistrano, California.

"The construction site is secured with fencing and a locked gate. The gauge was last used by Tetra Tech on October 28, 2025. The gauge case was locked with two padlocks, secured with a chain and two pad locks inside the locked Conex box. When the operator arrived at the site the following morning, the gate was open with the lock cut. The operator then discovered the lock on the Conex box was cut and the door open. An inspection of the inside of the Conex box found that the gauge box and miscellaneous equipment were taken from the Conex box. The operator then contacted the RSO and filed a report with the Orange County Sheriff's Department. The licensee is still investigating the incident. The Department will continue to investigate the incident."

CA incident number: 5010-102925

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 - STUCK SOURCE

The following information was provided by the Utah Division of Radiation Control via email:

"An industrial radiography source failed to return to the shielded position. While setting up for a shot, the radiographers repositioned the drive cable to improve their view. The cable was inadvertently placed on a hot pipe, melting approximately 5 feet of the 35-foot drive cable near the connection point. As a result, the source could not be retracted into the shielded position. The radiographer notified the radiation safety officer. A source retrieval team was dispatched to the site. The team removed the drive handle and manually pulled the source back into the camera, securing it in the fully shielded position. One licensee personnel, trained in source retrieval, received the most dose during the incident at 28 mR during the retrieval operation according to his Mirion Instandose dosimeter and corroborated by his worn personal electronic dosimeter."

Device: 880 Delta
Activity: 49.4 Ci of Ir-192

Utah Report Number: UT250003