Event Notification Report for June 09, 2025

AGREEMENT STATE REPORT - STOLEN GAUGE

The following is a summary of information provided by the Kansas Department of Health and Environment (KDHE) via email:

On June 9, 2025, at 0310 CDT, licensee employees discovered that a work trailer had been forcibly entered, and several items stolen including a moisture density gauge. The gauge, a Humboldt 5001 EZ (serial number 10103) containing 11 mCi of Cs-137 and 44 mCi of Am-241/Be, had last been verified onsite on June 6, 2025, around 1730. The theft was reported to KDHE and Kansas City Police Department.

Kansas Event Number: KS250005

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 TRITIUM EXIT SIGN

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

The Department received a notification from Consolidated Electrical Distributors that one exit sign with 10 Ci of H-3 was lost in Denver, CO. The exit sign is an Isolite Corporation Exit Sign, Model #: SLX60.

Colorado Event Report ID Number: CO250017

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 - MEDICAL EVENT

The following information was received from the California Department of Public Health via email:

"University of California, Los Angeles (UCLA) Health reported that a patient being treated for liver cancer underwent a Y-90 brachytherapy microsphere treatment on June 9, 2025. The written directive by the authorized user called for 120 Gy each [to be administered] to both the middle section (a 3 GBq vial) and the right liver section (a 20 Gbq vial). Post therapy evaluations determined that the administered dose to the right section of the liver was 88.9 Gy (74.08 percent of the prescribed dose), which is an underdose of more than 20 percent. The administered dose to the middle section of the liver was 114.2 Gy (95.17 percent of the prescribed dose) and was in accordance with the written directive. UCLA Health is conducting an investigation and will submit a 15-day report to the California Radiation Health Branch.

California 5010 Number: 060925

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.