An apparatus in one example comprises a vial that comprises a vial bottom
and a vial cap that connect to enclose one or more radioactive seeds; and
a radiation shielding container that comprises a bottom portion and a top
portion that connect to enclose the vial. The radiation shielding
container and the vial comprise one or more vents for movement of a
sterilant therethrough for sterilization of the one or more radioactive
seeds within the vial. The bottom portion of the radiation shielding
container comprises a structure that engages the vial bottom to prevent
rotational movement of the vial bottom during removal of the vial cap.