Event Notification Report for July 29, 2026

AGREEMENT STATE REPORT - MEDICAL EVENT

The following information was provided by the Ohio Bureau of Radiation Protection (the Bureau) via email:
"On July 21, 2026, the Bureau was contacted by the licensee regarding a case involving Y-90 TheraSphere treatment. After providing further information with the case against medical event criteria with the Ohio Department of Health, it was discovered/determined to be a medical event. On July 13, 2026, a patient was prescribed 1.96 GBq (52 mCi) to segment 5 and 6 of the right lobe. A total of 1.76 GBq (47.57 mCi) was delivered to the right lobe. Estimation from follow-up imaging indicated 36 percent of the spheres were delivered to Segment 6 and 64 percent were delivered to Segment 7, an adjacent segment outside the treatment site. The dose/spheres delivery was all limited to the right lobe. This will be further investigated, and a 15-day report by the licensee will be provided."

Ohio Event Number: OH260005

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 MOISTURE DENSITY GAUGE

The following is a summary of information provided by the Maryland Department of the Environment Radiological Health Program (MDE/RHP) via email:

"On July 20, 2026, at 1251 EDT, the MDE/RHP received a phone call from the radiation safety officer for Engineering Consulting Services (ECS) Mid-Atlantic, LLC (License No. MD-03-092-01). At approximately 1145 EDT on July 20, 2026, a Troxler Model 3430 nuclear density gauge (serial number 27326), containing an 8 millicurie Cs-137 source and a 40 millicuries Am-241:Be source, was struck by site equipment (a skid steer) during asphalt placement operations. The skid steer operator drove over the steel scraper plate where the gauge was placed, causing the plate to become buried. Because the drill rod had been inserted through the steel scraper plate, the depth rod was propelled into the side of the nuclear gauge, creating a hole in the device and damaging the gauge. The RSO was contacted, and surveys indicated no loss of radioactive material or abnormal radiation exposure. The gauge was then transported to the ECS Mid-Atlantic, LLC office. MDE/RHP will finalize a reactive investigation."

Maryland Event Number: MD-26-003

AGREEMENT STATE REPORT - STUCK SHUTTER

The following information was provided by the Pennsylvania Bureau of Radiation Protection (the Department) via email:

"On July 22, 2026, the licensee notified the Department of a shutter failure that was discovered on July 21, 2026.

"On July 21, 2026, the licensee discovered that a fixed gauge shutter was stuck open. The gauge is a Global Gauge Corporation (formerly E.S.C. Resources, Inc.) model SH-6000, serial number 70705 containing 2 Ci of Am-241. The gauge access area has been shut down. The licensee contacted a service provider and Global Gauge Corporation.

"The Department will perform a reactive inspection."

PA event number: PA260012

AGREEMENT STATE REPORT - STOLEN MOISTURE DENSITY GAUGE

The following summary of information was provided by the Ohio Bureau of Environmental Health and Radiation Protection via email:

On July 19, 2026, at 0300 EDT, a Troxler model 3440 (serial number: 24472) moisture density gauge (8 mCi Cs-137, 40 mCi Am-241/Be) was stolen from a house in Johnstown, Ohio which was being used as a temporary storage location between two construction projects. The video footage showed a person wearing a ski mask gaining access to the locked house via an exterior storm entrance into the locked basement, by using bolt cutters. The gauge was in a locked garage, hidden out of sight, and chained to the wall using a wall anchored eyebolt. The chain was cut with bolt cutters. The Wi-Fi connection was cut, possibly to disable the cameras. The contractor in charge of the field office has filed a police report.

Ohio event number: OH260006

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 - UNPLANNED CONTAMINATION

The following is a summary of information provided by the Oregon Health Authority, Radiation Protection Services (OHA) via email:

OHA was contacted by Laurelwood Animal Hospital about an event on 7/20/2026 involving a technician receiving skin contamination on their arm. A drop of I-131 forming at the end of a syringe fell off onto their protective gown and the attempt to blot the drop with a chemo pad pushed the contamination through the gown onto the skin. The technician removed the gown and washed their arm for 4 minutes. The maximum contamination level detected on the skin was 2200 counts per minute (cpm) at one inch from contact. The Radiation Emergency Assistance Center/Training Site (REAC/TS) was notified and consultants provided assistance. The technician will keep their forearm covered for a few days while the iodine decays.

Oregon Incident Number: 26-0038

AGREEMENT STATE REPORT - LOST GAUGE

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

"On July 21, 2026, at approximately 1525 [PDT], the licensee notified the Department that they had discovered one of their nuclear portable gauges was missing. There were no signs of a break-in. The gauge is a Troxler model 3430 (serial number: 35107) [moisture density gauge] containing approximately 9 mCi of Cs-137 and 44 mCi of Am-241/Be both in special form. The last known date of possession was on June 25, 2025, during receipt from its routine annual calibration. It is unknown when the gauge went missing. The Department is investigating this incident."

California 5010 Event Number: 072126

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