Event Notification Report for July 28, 2026

EN Revision Imported Date: 7/28/2026

EN Revision Text: AGREEMENT STATE REPORT - LEAKING SOURCE

The following information was provided by the New York State Department of Health (NYSDOH) Bureau of Environmental Radiation Protection (BERP) via email:

"NYSDOH BERP received a phone call from the U.S. Nuclear Regulatory Commission (U.S. NRC) on August 29, 2025, at approximately 1045 EDT to report a call they received from Gentech Scientific, LLC, a NYSDOH radioactive material licensee, to report a leaking electron capture device (ECD) source. NYSDOH contacted Gentech Scientific, LLC on August 29, 2025, at approximately 1100 to follow up on this event. The representative from Gentech Scientific confirmed that a leak test was performed and analyzed by the National Leak Test Center (NYSDOH radioactive material license number C2323) the day prior (August 28, 2025) on entrance port, housing, and exit ports of an Agilent 58-90 ECD (serial number K3818) containing 15 millicuries of Ni-63 (foil source).

"Only the entrance port sample returned a result considered leaking in accordance with 10 CFR 31.5(c)(5) at 6789 pCi. The housing and exit port samples did not exceed this threshold.

"Following Gentech Scientific, LLC's awareness of this event, the affected device/source was carefully placed into isolation/quarantine in laboratory storage area, posted with signage, and licensee staff were informed on this event and instructed to keep away from this device. This leaking source did not result in the contamination of equipment, personnel, or surfaces.

"Gentech Scientific, LLC has notified Agilent of this leaking source and will be seeking options to return this device to Agilent or otherwise dispose of the source via transfer to a licensed waste broker. Leak test copies have been provided to NYSDOH.

"NYSDOH BERP is actively monitoring this event under Incident No. 1542. Additional information will be provided to NMED once available."

* * * UPDATE ON 07/27/2026 AT 1336 EDT FROM NATHAN KISHBAUGH TO ERNEST WEST * * *

The following information was provided by the New York State Department of Health (NYSDOH) Bureau of Environmental Radiation Protection (BERP) via email:

"Gentech Scientific, LLC successfully returned this device to Agilent on November 3, 2025.

"This incident was left open following this date to perform a partial reactive inspection as part of the upcoming routine inspection, as substantial organizational changes presented a barrier in NYSDOH receiving updated information and documentation. This inspection confirmed that the device had been used and stored in accordance with the Sealed Source and Device Registry (SSDR) prior to discovery of the leaking source. The true cause of the leaking source was unknown. The corrective actions provided by the licensee appeared to be sufficient. Preventative measures to reduce the likelihood of recurrence are not available as the cause of this leaking source is unknown. During this inspection, the licensee was issued a citation for the overall radiation safety program and maintenance of required documentation. The corrective actions to these issues are being addressed under the inspection performed.

"NYSDOH BERP has closed Incident No. 1542."

Event report ID: NYDOH - 25-08

Notified R1DO (Dentel), NMSS Events Notification (email).

AGREEMENT STATE REPORT - LOST SOURCES

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

"The Agency was contacted on July 20, 2026, by the Agency's own radiation safety officer informing them of a missing shipment of Eckert and Ziegler calibration/check sources. While the carrier indicated delivery on July 17, 2026, the package was not received and was signed for by someone who is not an agency employee. An investigation has been opened with the carrier and Eckert and Ziegler have been notified.

"The package contained five sources. Each source contains a mixture of Cd-109, Co-57, Ce-139, Hg-203, Sn-113, Cs-137, Y-88, Co-60, Sr-85, and Am-241, ranging in activity from 6 to 36 microcuries. Isotope-specific activities are not available. Three are considered sealed sources with a foam matrix within a stainless-steel chamber. Two are face-loaded filter papers that are taped within a charcoal cartridge. These sources would be characterized as International Atomic Energy Agency (IAEA) Category 5 sources, meaning they are the least likely to be dangerous to a person, and no one could be permanently injured, even if dispersed. Due to the low reporting thresholds for Am-241, this has an immediate reporting requirement to the Nuclear Regulatory Commission."

Illinois event number: IL260023

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

* * * UPDATE FROM GARY FORSEE TO BRIAN P. SMITH ON 07/22/2026 AT 1657 EDT * * *

The following information was provided by the Illinois Emergency Management Agency via email:

"The package was located by the carrier and successfully delivered. The matter is considered closed."

Notified R3DO (Sanchez Santiago)

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