ENS 57927

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v t e ENS Event
19:10 Sep 12, 2025
Title	Package Exceeded External Radiation Limit
Event Description	The following is a summary of information provided by the Louisiana Department of Environmental Quality (the Department) via phone: The licensee reported that a package received from the Colorado School of Mines, containing a 1.166 mCi Co-57 source (model MC07.122, serial number: 31.23, manufacturer unknown at the time of the report) had measured external dose rates of 50 mr/hr on contact and 0.2 mr/hr at 1 meter. When the external packaging was opened, it was discovered that the internal shipping container had been damaged. It is believed that the damage to the internal shipping container degraded the effectiveness of the shielding, resulting in the external radiation levels measured. The Department will follow-up with additional information as it is developed. * * UPDATE ON 09/15/2025 AT 1319 EDT FROM JAMES PATE TO ROBERT THOMPSON * * * The following is a summary of information provided by the licensee via email: The package was supposed to be an excepted package. The package was damaged. The package received contained one source with the lid off the transport container inside the package. The activity of the source initially reported was the current activity; the original activity of the source was 10 mCi. The source was manufactured by Ritverc JSC and is used in a Mossbauer spectroscopy device. The Colorado School of Mines is licensed by the State of Colorado, license number CO 627-01. Event report ID number: LA20250010 Notified R4DO (Agrawal), NMSS Events Notification (email)

ENS 57927 +/-
Where
Isoflex Radioactive, Llc St. Rose, Louisiana (NRC Region 4)
License number:	LA-13516-L01
Organization:	Louisiana Dept Of Environmental Quality
Reporting

Agreement State
Time - Person (Reporting Time:+-0.18 h-0.0075 days <br />-0.00107 weeks <br />-2.46564e-4 months <br />)
Opened:	Jim Pate 18:59 Sep 12, 2025
NRC Officer:	Robert A. Thompson
Last Updated:	Sep 15, 2025
57927 - NRC Website
v • d • e

v t e Emergency Notification System
Isoflex Radioactive, Llc with Agreement State
WEEKMONTHYEAR2025-09-12T19:10:00 [Table view]
[ENS list for Isoflex Radioactive, Llc]

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