10 CFR § 35.406
Brachytherapy sources accountability
June 9, 2020
(a) A licensee shall maintain accountability at all times for all brachytherapy sources in storage or use.
(b) As soon as possible after removing sources from a patient or a human research subject, a licensee shall return brachytherapy sources to a secure storage area.
(c) A licensee shall maintain a record of the brachytherapy source accountability in accordance with §35.2406.