-15of many rural children.
Since much of the region surround~
ing the Nevada Test Site is occupied by farms and rather
small towns, in which this type of Joon] milk consumption must
prevail, it becomes necessary to know the iodine 131 content
of num3rous Separate small farm-size milk supplies in order
to determine the iodine 131 intake of children living in this
region.
Unfortunately appropriate measurements of iodine 131 in
local milk supplies do not appear to have been made.
For
this reason gir29t estimates of the hazard to the thyroid. are
not possible, ag they are in the case of many large-scale
populations which consume commercial nilk supplies.
Iodine
131 measurements of commercial milk supplies for a nupber of
cities have been available since 1957.
Because of tho lack of such direct information on iodine
131 levels of milk consumed by children in the region of the
Nevada Test Site, it dDecomes necessary to develop « method
for estimating these values from other types of fallout
measurements.
In what follows, we consider how this can be done.
2)
r
estimation of
iodine
}
s
gverall measurements ofgamma and betaradistion
When nuclear fission occurs, a wide range of atomic
products result.
The physical processes which result in
the appearance of the different products of nuclear
fission have been stucied extensively.
From these studies,