ENS 54654

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v t e ENS Event
06:00 Apr 7, 2020
Title	Agreement State Report - Irradiator Aperture Failed to Close
Event Description	The following information was received via E-mail: The aperture electronic opening and closing mechanism malfunctioned on a J.L. Shepard Mark I series irradiator while the aperture was open. There was a smell of burning wires and visible smoke. The analysts cut power to the unit and notified department management. Utilizing portable shielding, and following ALARA principles, the attenuator of the device was able to be closed, which significantly reduced dose rates. Currently, the aperture is stuck partially open and the attenuator is closed. At 1.5 meters from the point of highest dose, the rate is approximately 10 mR/hr. Both analysts were wearing Mirion Instadose dosimeters and the measured dose to both dosimeters was less than the minimum read amount of 1 mrem. The irradiator is located in a shielded calibration room located in the waste building. There is no dose rate above background in any area, accessible by either non-radiation workers or members of the public, around the building where the calibration room is located. The area has been securely locked, the door alarm is activated, and there are signs placed to remind everyone to not use the device. Utah Department of Environmental Quality, Division of Waste Management and Radiation Control personnel were notified of the incident via normal work E-mail after the conclusion of the business of the day on April 8, 2020. The notification was not read until the morning of April 9, 2020 when normal business resumed and was then assigned to appropriate staff. The device manufacturer has been contacted to determine repair options. Utah Event Report ID No.: UT 200004

ENS 54654 +/-
Where
Utah Division Of Radiation Control Salt Lake City, Utah (NRC Region 4)
License number:	UT 1800001
Organization:	Utah Division Of Radiation Control
Reporting

Agreement State
Time - Person (Reporting Time:+51.35 h2.14 days <br />0.306 weeks <br />0.0703 months <br />)
Opened:	Tim Butler 09:21 Apr 9, 2020
NRC Officer:	Donald Norwood
Last Updated:	Apr 9, 2020
54654 - NRC Website
v • d • e

v t e Emergency Notification System
Utah Division of Radiation Control with Agreement State
WEEKMONTHYEAR		Agreement State Report - Incorrect Radionuclide Administered to a Patient 2020-09-16T19:00:00 [Table view]
[ENS list for Utah Division of Radiation Control]

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