ENS 57951

v t e ENS Event
06:00 Sep 25, 2025
Title	Lost Exit Sign
Event Description	The following is a summary of information provided by the Colorado Department of Public Health and Environment (the Department) via email: The Department received a notification from the licensee that one (1) exit sign containing 7.62 Ci of tritium was lost in Boulder, Colorado. Manufacturer: Isolite Corporation Model Number: 880-12-6 Isotope: H-3 Activity: 7.62 Ci Event Report ID No.: CO250029 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

ENS 57951 +/-
Where
Boulder Marriott Hotel Boulder, Colorado (NRC Region 4)
License number:	GL002779
Organization:	Colorado Dept Of Health
Reporting

Agreement State
Time - Person (Reporting Time:+11.2 h0.467 days <br />0.0667 weeks <br />0.0153 months <br />)
Opened:	Kathryn Kirk 17:12 Sep 25, 2025
NRC Officer:	Ernest West
Last Updated:	Sep 25, 2025
57951 - NRC Website
v • d • e

v t e Emergency Notification System
Boulder Marriott Hotel with Agreement State
WEEKMONTHYEAR2025-09-25T06:00:00 [Table view]
[ENS list for Boulder Marriott Hotel]

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