ENS Event | |
|---|---|
05:00 Aug 10, 2022 | |
| Title | Lost Y-90 Microspheres |
| Event Description | The following information was received from the Wisconsin Department of Health Services (the Department) via email:
On August 31, 2022, the licensee notified the Department that they had lost control of licensed radioactive material. Per the licensee's report, on or about August 10, 2022, four sharps containers with yttrium-90 microsphere waste were inadvertently taken from the licensee's decay-in-storage room and placed in a locked room in the hospital's shipping department for disposal as biohazardous material. On August 15, 2022, the four sharps containers (approximately 60 millicuries of yttrium-90) were picked up by the hospital's biohazardous waste vendor, where they are assumed to have been autoclaved and disposed in a landfill. The licensee became aware of the loss on August 29, 2022. Based on the current activity of the sources (less than 1 millicurie) no attempt will be made to retrieve the material. No members of the public are expected to exceed public dose limits. A Department investigation is ongoing. WI incident no.: WI220020 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 |
| Where | |
|---|---|
| Marshfield Clinic Eau Claire, Wisconsin (NRC Region 3) | |
| License number: | 141-1162-01 |
| Organization: | Wisconsin Radiation Protection |
| Reporting | |
| Agreement State | |
| Time - Person (Reporting Time:+516.05 h21.502 days <br />3.072 weeks <br />0.707 months <br />) | |
| Opened: | Megan Shober 17:03 Aug 31, 2022 |
| NRC Officer: | Mike Stafford |
| Last Updated: | Aug 31, 2022 |
| 56082 - NRC Website | |
Marshfield Clinic with Agreement State | |
WEEKMONTHYEARENS 560822022-08-10T05:00:00010 August 2022 05:00:00
[Table view]Agreement State Lost Y-90 Microspheres ENS 508232015-02-13T06:00:00013 February 2015 06:00:00 Agreement State Agreement State Report - Gamma Knife Unit Failed to Function as Designed ENS 462492010-09-09T05:00:0009 September 2010 05:00:00 Agreement State Agreement State Report - Delivered Dose Is Different from the Prescribed Dose ENS 460822010-07-09T05:00:0009 July 2010 05:00:00 Agreement State Agreement State - Brachytherapy Treatment Dose Delivered Differs from Prescribed ENS 414202005-02-16T06:00:00016 February 2005 06:00:00 Agreement State Agreement State Medical Event 2022-08-10T05:00:00 | |