Background Radiation 10
Background Radiation 10 :
Radiation and Radiological Disasters. Radiation from cosmic sources; naturally occurring radioactive materials, including radon (except as a decay product of source or special nuclear material), and global fallout as it exists in the environment from the testing of nuclear explosive devices. It does not include radiation from source, byproduct, or special nuclear materials regulated by the Nuclear Regulatory Commission. The typically quoted average individual exposure from background radiation is 360 millirems per year. G-M meters usually read 0.03mR/hr or 400cpm for background levels
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