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Verification of Safety Compliance of Delivering Radionuclides at Vanderbilt University

Chen, Liang1; Helstern, Christopher M.2

doi: 10.1097/HP.0000000000000897
OPERATIONAL TOPIC
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Various radionuclides are transported at Vanderbilt University and Vanderbilt University Medical Center on a daily basis, to provide the necessities for diagnostic, therapeutic, and research applications. The delivery of the radionuclides takes various pathways where the general public may receive radiation doses. The Tennessee Department of Environment and Health Radiological Division regulates the dose limits for members of the public to be less than 1 mSv per year and 20 μSv in any hour. We designed a project to verify that potential doses received by the general public meet state regulations. Before the departure of the delivery, dose rates from three directions at a distance of 30 cm with respect to the transport vehicle, were measured using a tissue equivalent survey meter. During the shipment, times were recorded and the number of persons encountered along the path was estimated. Annual and hourly doses were calculated, conservatively assuming that a member of general public would follow the shipment at a distance of 30 cm, for the entire duration of the delivery. Calculated dose rates for each delivery and various combinations of radionuclides were found to be below state regulation limits.

1Vanderbilt University, Nashville, TN. Physics and Astronomy, Vanderbilt University, 6301 Stevenson Center, Nashville, TN 37235;

21161 21st Avenue South MCN A0201 Nashville, TN 37232.

The authors declare no conflicts of interest.

For correspondence contact: Liang Chen is currently a Ph.D student in the Department of Physics at Vanderbilt University. This article is the result of his Masters project, in collaboration with the Radiation Safety Department of Vanderbilt University, under the supervision of Dr. Michael G. Stabin. His email is liang.chen@vanderbilt.edu.

© 2018 by the Health Physics Society