remaining,there for 24-48 hours; and that at abc ut 190 miles the
radiation would have been fatal to &bout 5 to 10 percent of the
people poolat, Ayprrwed '
would have been
Thus about 7,000 square miles of territo
so severely contaminated that survival would dep nd upon the most
Prompt protective measures.
Beyond a point abouk 220 miles
distant it ig unlikely that any radiation deaths would have
cecurred,
angerous fallout
Fortunately, adequate protection against
is usually found in and around American cities,
nd if proper
precautions are taken to avoid exposure, as indidated below,
casualties from radiation can be reduced to very|small numbers.
IV.
Summary Conclusions for Civil Defense
A, Early protective action is vitally impdrtant since the
dosage a person completely exposed might receive fin the first few
hours after fallout has started will exceed that
khich the same
person would receive over the rest of a@ week spe
in the same
location.
B, In an area surrounding ground zero and
fin a much larger
area in the direction of the effective wind, radiktion intensities
may be so high that most civil defense activities§{ will have to be
postponed or conducted with great caution.
Dange
determined by radiological monitoring techniques
areas must
be
nd civil defense
decisions must be made with serious regard to the radiological
situation,
Cc. The threat to many rural areas, especia Lly to those
which are on the prevalent down-wind side (usuall r eastward) of
large target cities, necessitates extensive civil defense
preparetions.
D. Civil Defense organizations must vastly increase the
capability of radiological defense services, part: cularly
monitoring,
DOE ARCHIVES
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