Determination of the radiation protection factor required for a fallout shelter.

TL;DRAbstract

The total integrated radiation dose, 1 to 4 weeks after a nuclear attack, will be approximately I approx equal 3D/sub t/t, where I is the integrated dose in roentgen, t is the time after the attack in hours and D/sub t/ is the dose rate in roentgens per hour at the time t. This approximate equation is valid only for values of t ranging from about 0.3 to 12 hr, If the dose rate after 1 hr is 1000 r/hr, then the integrated dose after 1 to 4 weeks will be about 3000 r. lt is interesting to note that the integrated dose after 1 to 2 days will be about twothirds of this value, or around 2000 r. Data are included on the probability of survival at various levels of exposure. The shielding protection factor, PF, required will be PF = (I/LD) approx equal (3D/sub t/t/ LD). Thus, the PF depends on the initial dose rate and the LD selected. This same equation can be used to predict the chances of survival after a nuclear attack if the PF is known and a radiation detector is available. Examples are

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