ENS 57012

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v t e ENS Event
12:00 Mar 6, 2024
Title	Contamination in Restricted Area
Event Description	The following is a summary of information provided by the licensee via telephone: On March 6, 2024, around 0600 CST, a technician found loose molybdenum (Mo-99) / technetium (Tc-99m) contamination inside a restricted area. Prior to the discovery, a production hot cell inside the restricted area had been deep cleaned as part of the regular maintenance program. A thorough investigation of the area was conducted which revealed additional loose contamination on the lab floor. Surveys of surrounding areas did not reveal any spread of contamination outside of the restricted lab area. Due to (1) the existing access controls, (2) personal protective equipment requirements for lab access, and (3) the absence of contamination identified by body scans of personnel exiting the lab; the licensee does not suspect any spread of contamination outside of the restricted area or personnel intake. Biological samples will be collected to confirm that no intake occurred. The highest contamination level identified was 260 mrem/hr on contact and 2.3 mrem/hr at 1 foot. The contamination has been remediated to below licensee action levels. Overall, 2.4 mCi of Mo-99 was identified outside of the production hot cell. The 10 CFR 20 Appendix B limit for Mo-99 is 1 mCi. The licensee is investigating the root cause of this event. * * RETRACTION ON 07/15/24 AT 1205 EDT FROM DANEIL SZATKOWSKI TO KERBY SCALES * * * The following retraction is a summary of information provided by the licensee via telephone: Due to performing additional air samples and biological assays, the licensee determined that they did not exceed any thresholds, and the event is not reportable. Notified R3DO (Nguyen) and NMSS Events Notification via email.

ENS 57012 +/- *RETRACTED*
Where
Curium Us Llc Maryland Heights, Missouri (NRC Region 3)
License number:	24-04206-01
Organization:	Curium Us Llc
Reporting

10 CFR 20.2202(b)(2) 10 CFR 30.50(b)(1)
Time - Person (Reporting Time:+5.08 h0.212 days <br />0.0302 weeks <br />0.00696 months <br />)
Opened:	Dan Szatkowski 17:05 Mar 6, 2024
NRC Officer:	Adam Koziol
Last Updated:	Jul 15, 2024
57012 - NRC Website
v • d • e

v t e Emergency Notification System
Curium Us Llc with 10 CFR 30.50(b)(1), 10 CFR 20.2202(b)(2)
WEEKMONTHYEAR2024-03-06T12:00:00 [Table view]
[ENS list for Curium Us Llc]

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ENS Notification