Working level

Working level (WL) is any combination of short-lived radon daughters (for radon-222: polonium-218, lead-214, bismuth-214, and polonium-214; and for radon-220: polonium-216, lead-212, bismuth-212, and polonium-212) in 1 liter of air that will result in the ultimate emission of 1.3 10 5 MeV of potential alpha particle energy.


10 CFR § 20.1003

Scoping language

As used in this part:

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