Limits on external radiation levels from storage containers and source changers.

CFR · 2024-01-01 · US · Title 10

The maximum exposure rate limits for storage containers and source changers are 2 millisieverts (200 millirem) per hour at any exterior surface, and 0.1 millisieverts (10 millirem) per hour at 1 meter from any exterior surface with the sealed source in the shielded position.

official document · source cfr-2024 · id 10:§ 34.21