Event Notification Report for May 14, 2026

AGREEMENT STATE REPORT - LOST SOURCES

The following information was provided by the Nevada Radiation Control Program (RCP) via email:

"On April 1, 2026, RCP was notified by the licensee that members of a cleaning crew disposed of radioactive sources through the common trash. The licensee was in the process of moving to a new location and they left their sources in a marked box for a local radiopharmacy to move the sources to the new location and to dispose of two sources that were past their useful activity. The landlord's cleaning crew entered the building and disposed of the box of sources in the common trash which was picked up by the waste disposal company.

"The cleaning company sent people to the waste disposal transfer station but were unable to locate the sources that were thrown out. They then went to find the sources at the landfill operated by the waste disposal company. Following notification that the cleaning crew was looking for the sources, the licensee was directed to send someone qualified to look for the sources. The landfill refused both the cleaning crew staff members and the licensee staff access to the landfill because the sources did not set off their radiation monitoring system.

"The licensee provided RCP with their report of missing sources on April 6, 2026, that included the information about the lost sources. The sources were in shielded containers for transfer to the new location and this is probably why the Apex landfill radiation monitors did not detect them in the load coming from the transfer station. Given the daily volume of materials processed at the landfill, the sources are unrecoverable."

Source 1: Sealed source; Manufacturer - Eckert & Ziegler; Model Number - GF-0008; Serial Number 1771-70-62; Activity - Cs-137 (0.0000005 Ci)
Source 2: Sealed source; Manufacturer - I.P.I; Model Number - unknown; Serial Number 5844221; Activity - Cs-137 (0.0002617 Ci)
Source 3: Sealed source; Manufacturer - RadQual; Model Number - BM05 10; Serial Number BM051022076103; Activity - Co-57 (0.010 Ci)
Source 4: Sealed source; Manufacturer - International Isotopes; Model Number - BM05 10; Serial Number BM051023264101; Activity Co-57 (0.010 Ci)
Source 5: Sealed source; Manufacturer - Radqual; Model Number - BM05 10; Serial Number FLB253352B; ActivityCo-57 (0.010 Ci)

Nevada Item Number: NV260003

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