Patent ID: 8003967

Claim:
A radiation-shielding assembly for a container having a radioactive material disposed therein, the assembly comprising: a body comprising a sidewall at least partially defining a cavity, the body defining an opening into the cavity, the body also comprising radiation shielding material; a cap adapted for releasable attachment to the body when the cap is in a first orientation relative to the body and for non-attached engagement with the body when the cap is in a second orientation relative to the body, radiation shielding material of the cap closing the opening in both the first orientation and in the second orientation; the cap including a magnetic portion operable to attract the base when the cap is in the first orientation, the cap being constructed to inhibit magnetic attraction of the cap to the base in the second orientation; and the cap being operable to inhibit escape of radiation from the cavity of the assembly through the opening when the cap is adjacent the opening in the first orientation and in the second orientation.