V. B. 1. DOSES TO THE GASTROINTESTINAL TRACT
Assume:
About 22 pe of fallout activity at time of intake will result
in one rad of dose to the lower large intestine.*
(5 x 1073) (2200) = 11 pe intake on D + 3 days
35 = 0.5 rads to lower large intestine from the 11 yc intake
At a constant rate of volume intake and an activity intake
decreasing according to the relationship of (time)-1:7, the
total dose from the third day on is (assuming 70 years is
equivalent to the infinity dose)
Dz
3-00
9 A3t3 where A3
daily dose on the third day
t3 = 3rd day after detonation
D390 = (5) (¢.5) (3) = 7.5 rads
According to reference below the expected activity at times
earlier than ™ - 3 days (using the relationship (time)~1°2)
in roughly retched by the increased required activity to
produce tne sete dose to the lower large intestine, i.e., if
il pc invaxe or D+ 3 will result in 0.5 rads to the lower
dargé invtestin:, then drinking the same amount of water per
2 cocvdod oreceutng This will also produce about 0.5
7e5 + 1.5 = 9.0 rads total for intake from the oeginning of
the first day for a lifetime.
*"Criteria for Establishing Short Term Permissible Ingestion of
Fallout Material", Dunning,’ Gordon M. To be published.
(The pertinent graph from this report is reproduced here.)
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