it is to be expected that dose-rate readings, taken with survey meters, will
be the available evidence at the times of concern.
this necessitates making
rough approximations in advance of the effects of weathering and of shielding
“trom normal housing, in reducing the radiation exposure. . The variable nature
of these two parameters makes impossible the establishment of a precise
rule covering all situations.
Therefore, the following may be used in
making conservative estimates of these effects:
a.
For weathering -- the measured gamma dese rates at three
feet above the ground be assumed to decay according to (4)7t-2
for the first week after a detonation, (t)-1-3 for the second
week, and (t)~1+4 thereafter.
b.
For shielding -- the accumulated dose per day be 25% less
than the out-of-doors dose *#
In the case of a truly emergency situation where potential hazards
may exist either from the
fallout or from mass evacuation of large popu-
lations, it would seem rroner that due consideration be given to the
biologice: tepair orecess that takes place with rediation doses distributed
%
This cconespt was suzgested after snalyvaing data from both the Nevada Test
Site ana the oniwetok Previnge Ground 4nd wes intended to wives peneraiiged ~
Wlimsies tec cover aowids variety of gitunacions.
21 Ls reensenired thrt
Wath ine smaller Falicut patterns around tne Nevada Test Site and wita
the sani; soiis, the effcoctive decey constants may be greater than these.
nowever, rather than attemot further estimates for NTS at this time,
Chess Values will os used untii the results of tne capsaded radiolsgiensl
monitoring program for Gseration PLUTSEOD can be analyze,
*
This is based on an average 12 hours per day stay in a frame house having
an attenuation factor of two. It is recognized that some individuals
will be in buildings having higher attenuation factors and for longer per-
lods of time.
On the other hand, this is generally an area where people
may live an appreciable amount of time out of doors and where windows and
doors are left open, so the fallout material may enter buildings.
Again revision of this estimate will await the results of the expanded
rédiological program of Oneration PLUMBBOR,
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