Event Notification Report for June 10, 2026

AGREEMENT STATE REPORT - DAMAGED MOISTURE DENSITY GAUGE

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

"On June 3, 2026, the Department was notified by the license's radiation safety officer (RSO) that a InstroTek model 3500 gauge, containing a 40 millicurie americium-241 source and an 8 millicurie cesium-137 source, had been damaged at a temporary work site.

"The event occurred when the technician walked about 15 feet from the device, and while their back was to the gauge, a truck backed over the gauge and bent the cesium source operating rod. The source was in the fully shielded position when the gauge was struck. The lock was on the gauge at the time of the event but broke off when the gauge was hit. The source remained in the fully shielded position. The RSO stated they did not try to operate the cesium source rod for fear it would get stuck outside the shielded position. The RSO stated that the bent operating rod appeared to be the only damage the gauge suffered.

"The RSO stated that a radiation survey conducted of the gauge after the event showed the radiation levels were normal. The RSO stated no individual received any significant exposure during this event.

"The RSO stated the gauge was being taken to a service provider to be repaired.

"Additional information will be provided as it is received in accordance with SA-300."

Texas incident number: 10299
NMED number: TX260019

AGREEMENT STATE REPORT - STOLEN TRITIUM EXIT SIGNS

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

"On June 3, 2026, the licensee reported the theft of three tritium exit signs from their AMC Theatre Riverside facility.

"The exit signs were Isolite brand tritium exit signs, model 2040-95, purchased in 2017, with current tritium activity estimated to be between approximately 5 Ci to 15 Ci of tritium per sign, depending on their original activities. Their original activities are not currently precisely known. The exit signs were reported stolen to the Riverside police department on March 18, 2026. [The licensee] stated in the police report that during a monthly exterior building check in January 2026, staff noticed that three exit signs were missing, but they were not sure when exactly they were stolen. These exit signs were located inside plastic housings and receded into walls of the parking structure area of the galleria complex below the theatre.

"These exit signs have not been recovered.

"When making a replacement exit sign purchase order from their vendor, the project manager informed [the licensee] that the theft needed to be reported to the CDPH/RHB.

"CDPH/RHB is continuing to investigate this event."

California 5010 number: 060326

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 0934 CDT on June 9, 2026, it was determined that a non-licensed supervisor failed a test specified by the fitness-for-duty testing program. The individual's authorization for site access has been terminated.

"The NRC Resident Inspector has been notified."