ENS Event | |
|---|---|
19:40 Jul 18, 2016 | |
| Title | Sealed Source Leak |
| Event Description | During a sealed source leak test of two (2) cesium-137 needles, prior to implant into an animal, leakage greater than 0.005 microcuries was measured. The leakage was contained in the source holder. The Cs-137 needles have been stored in shielding pending disposal. There was no contamination or over- exposure. The needles contain 10 mCi of Cs-137 total (for both). The licensee has notified NRC Region 3 and expects to submit a 30 day follow up report.
Follow-up leak tests have been performed on all remaining Cs-137 needles used for equine brachytherapy. One additional leaking needle was identified. The activity for the additional leaking needle, as of 7/18/2016, was 7.1 mCi. The additional leaking needle was manufactured in 1982. The additional leaking needle has been taken out of service, put into secondary containment, and is awaiting waste disposal. The licensee notified NRC Region 3. Notified R3DO (Peterson) and via E-mail NMSS Events Notification. 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 Missouri-Columbia Columbia, Missouri (NRC Region 3) | |
| License number: | 24-0513-32 |
| Organization: | University Of Missouri |
| Reporting | |
| 10 CFR 30.50(b)(2), Licensed Material Protection Equipment Failure | |
| Time - Person (Reporting Time:+93.67 h3.903 days <br />0.558 weeks <br />0.128 months <br />) | |
| Opened: | Jack Crawford 17:20 Jul 22, 2016 |
| NRC Officer: | Daniel Mills |
| Last Updated: | Jul 27, 2016 |
| 52121 - NRC Website
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University of Missouri-Columbia with 10 CFR 30.50(b)(2) | |
WEEKMONTHYEARENS 521212016-07-18T19:40:00018 July 2016 19:40:00
[Table view]10 CFR 30.50(b)(2) Sealed Source Leak ENS 516732016-01-19T16:30:00019 January 2016 16:30:00 10 CFR 30.50(b)(2) Leaking Ni-63 Source 2016-07-18T19:40:00 | |