ENS 55525
ENS Event | |
|---|---|
05:00 Oct 5, 2021 | |
| Title | Agreement State - Lost I-125 Radioactive Seed |
| Event Description | The following was received from the Iowa Department of Public Health (IDPH) via email:
On October 5, 2021, the University of Iowa's radiation safety officer [RSO] contacted the Iowa Department of Public Health (IDPH) regarding a lost Iodine-125 (I-125) seed used for a localization of non-palpable lesion in breast tissue. The excised specimen containing two I-125 seeds had been received in pathology at 1704 CDT on 10/4/2021. The specimen was removed from container, surveyed with a Geiger counter, and imaged in the PathVision Faxitron by prosector. The radioactive seed localization (RSL) tracking sheet that came with the specimen from surgery indicated that two seeds were removed and two radioactive seeds were identified with associated biopsy clips via Faxitron imaging. The specimen was taken from the Faxitron to Grossing Workstation #3 and triaged by pathology staff. Triaging included weighing, measuring, and inking. Two cuts were made, one cut per biopsy site, in order to facilitate specimen fixation and to meet cold ischemia time requirement of one hour. A fixing tin was filled with formalin and the specimen was transferred to the fixing tin and appropriately labeled. Sharps waste were deposited in the sharps container at Grossing Workstation #3. Disposable materials used during triaging (absorbent pads, ink applicators, weigh boat, paper towels, gauze, and gloves) were deposited in the red biohazard waste at Grossing Workstation #3. Original specimen container and fixing tin were placed on the radioactive storage shelves by the Faxitron for overnight storage. Sometime between 1900 CDT 10/4/21 and 0700 CDT 10/5/21, housekeeping staff came in and collected trash and cleaned the floors. Laundry was collected between 0730 and 0800 CDT on 10/5/21. At 1100 CDT on 10/5/21, pathology staff brought the specimen to Grossing Workstation #5. They removed the specimen from the fixing tin, made multiple cuts into the specimen, laid out the slices on a Faxitron specimen tray, and attempted to image the specimen. The Faxitron malfunctioned and was not able to be brought to working order. Staff then laid out the specimen slices on the photo stand to take a photograph for a section diagram (instead of a Faxitron image for a section diagram). The photo was taken and the specimen was returned to Grossing Workstation #3. Photo stand was cleaned and waste from cleaning the photo stand was deposited in red biohazard trash at Grossing Workstation #5. A centrally located radioactive seed (seed #1) and associated biopsy clip were identified and removed from the specimen. Seed #1 was placed in a mesh bag and placed in a lead vial. The specimen at site of Seed #2 was then serially sectioned in an attempt to locate Seed #2 and its associated biopsy clip. The biopsy clip associated with seed #2 was found, but seed #2 was not found. The adjacent tissue was examined as well and without finding seed #2, the Geiger counter was then utilized to localize the second radioactive seed. The Geiger counter had no reading above background, indicating no seed present. Seed #1 was removed from the lead vial and scanned with the Geiger counter and had a reading of 5 mR/hr. Four lab staff immediately began looking for the radioactive seed, both visually and with the Geiger counter. They checked clothing and shoes of any staff who had been around the specimen. They checked the original specimen container as well as the fixing tin. Workstations #3 and #5 were thoroughly checked and re-checked, including trash cans, work surfaces, shelves, materials on shelves, drawers, sharps containers, sinks, floors, and associated carts. The walkway between workstations #3 and #5 and the Faxitron and photo stand were checked, as well as the floor and any trashcans along the way. Additionally, the Faxitron chamber table were checked as well as the associated shelf, floor and trash can. When Seed #2 could not be found by the lab staff, the pathology supervisor contacted the RSO as well as Nuclear Medicine to notify them of a missing radioactive seed. RSO called and discussed what occurred with the pathology supervisor and sent two members of the Radiation Safety section of University's Environmental Health & Safety, who surveyed the same areas as the lab staff had scanned, as well as the changing room and the area of the laundry hamper, but were unable to locate Seed #2. On October 6, the RSO surveyed all of the waste containers and bags that were in the [University of Iowa Health Care] (UIHC) biohazard waste storage room at UIHC. This consisted of three large containers and one very large container, containing dozens of biohazard waste bags in total. It could not be confirmed whether or not it was likely that the bag removed from surgical pathology between 1900 CDT on 10/4/21 and 0700 CDT on 10/5/21 would have still been in the waste storage area. The RSO did not note any readings above background on the survey meter used to do the survey, and given the potentially hazardous nature of the contents, did not pursue a closer examination of the biohazardous waste. Due to the large search and survey response from pathology, nuclear medicine, environmental health & safety, and RSO, it was determined that there is a high probability the seed was wrapped up in absorbent materials used in the triage process and placed into a biohazard waste bin and removed from the department overnight. Iowa Event Number: IA210004 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 | |
|---|---|
| University of Iowa Iowa City, Iowa (NRC Region 3) | |
| License number: | 0037152AAB |
| Organization: | Iowa Department Of Public Health |
| Reporting | |
| Agreement State | |
| Time - Person (Reporting Time:+250.27 h10.428 days <br />1.49 weeks <br />0.343 months <br />) | |
| Opened: | Stuart Jordan 15:16 Oct 15, 2021 |
| NRC Officer: | Mike Stafford |
| Last Updated: | Oct 15, 2021 |
| 55525 - NRC Website
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University of Iowa with Agreement State | |
WEEKMONTHYEARENS 555252021-10-05T05:00:0005 October 2021 05:00:00
[Table view]Agreement State Agreement State - Lost I-125 Radioactive Seed ENS 551232021-02-03T06:00:0003 February 2021 06:00:00 Agreement State Lost P-32 Shipment ENS 466482011-02-22T06:00:00022 February 2011 06:00:00 Agreement State Agreement State Report - Static Eliminator Source Seal Integrity Lost ENS 464582010-11-29T06:00:00029 November 2010 06:00:00 Agreement State Agreement State Report - Leaking Source in a Static Eliminator ENS 428512006-09-20T05:00:00020 September 2006 05:00:00 Agreement State Irradiator Source Temporarily Stuck in the Exposed Position ENS 436392005-02-01T05:00:0001 February 2005 05:00:00 Agreement State Agreement State Report - Dose Differs by Greater than 50% of Prescribed 2021-02-03T06:00:00 | |