Tag Archives: seven – ten rule

Rules on Nuclear Fallout

I have been thinking about posting more information on nuclear fallout so today I will explain the seven – ten rule of nuclear decay.

Assume that a one Megaton Bomb blast occurs and you are sheltered or far enough away to survive the blast.  If fallout of one thousand Rads arrives at your location 1 hour after the blast, you have to be sheltered.  A four hundred and fifty Rad accumulative dose can kill you, so one-half hour of unsheltered exposure can be fatal.  If you have shelter and are using the seven – ten rule you will know that after seven hours the outside rate will drop to 100 Rads per hour.  …

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