ENS 57457

v t e ENS Event
06:00 Dec 5, 2024
Title	Stuck Sources
Event Description	The following information was provided by the Illinois Emergency Management Agency (the Agency) via phone and email: On December 5, 2024, two 1.53 mCi Co-60 sources were removed from their casting molds for an outage and placed into shielded source holders. At that time, it was discovered that one source could not be fully placed into its shielded configuration. The cause was believed to be a bend or steel prohibiting the source from being fully inserted. The active portion of the source was shielded, but the inactive portion extended beyond the shutter. It was also discovered that the shutter for the second source was inoperable. The sources were oriented to minimize exposure rates and secured in the licensee's source storage room. Exposure rates within the source storage room were 2 mR per hour and the exterior wall (unrestricted area) was maximumly 1.6 mR/hour. These measurements were confirmed by Chase Environmental consulting staff on December 6, 2024. The Agency staff will respond to the facility and assess the sources and shields when being removed for use on Monday, December 9, 2024. There are no anticipated exposures in excess of regulatory limits as a result of this incident. The matter is reportable to the Agency under 32 Ill. Adm. Code 340.1220(c)(2). Equipment information: Device: Gauge shutter Manufacturer: Berthold Model number: LB 300 IRL ML Illinois Item Number: IL240031

ENS 57457 +/-
Where
Alton Steel Alton, Illinois (NRC Region 3)
License number:	IL-01738-01
Organization:	Illinois Emergency Mgmt. Agency
Reporting

Agreement State
Time - Person (Reporting Time:+33.85 h1.41 days <br />0.201 weeks <br />0.0464 months <br />)
Opened:	Gary Forsee 15:51 Dec 6, 2024
NRC Officer:	Jon Lilliendahl
Last Updated:	Dec 6, 2024
57457 - NRC Website
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