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A member asked:
How fast does radiation dissipate after it has been released?
A doctor has provided 1 answer
The 7-10 rule: The danger of radiation from fallout decreases with time. With each factor-of-seven increase in time (7 hours after the fallout hits, 49 hours afterwards, 343 hours (2 weeks) afterwards, etc... ) the radiation is reduced by a factor of 10.
Answered 2/11/2016
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