ae
The inherent variability of such factors as windstructures, yield of the weanon, etc. will praclude any rule
for precise needy ction of faliout for all types of detonatiens.
However, 58 oe ~cint of reference, the attached
Idealized Mao shows the fallout for the March 1, 1954
high yield detonation in the Facific, oased on the assumption
that people were 19 remain living normally in the area.
It
ia to be emphasized what ia) different yields of weapons,
different wind atructures, and different kinds ofland
ve
surfaces would result in different fallout patte ne, and
{b) this is the amount of fallout from a single high-yield
weapon.
The unit of radiation exposure is expressed as
"Effective Biological Dose” which incorporates the beat|
estimates of effects of weathering (rain and winds)
:
ducing the contamination of the environment.
from normal housing, and of the factor of the |
repair process that is operative concurrently>
accumulation of the radiation dose.
The two innermost tsodose Lines showsrere
selected to suggest regions where (a) a significant. pe
of personnel might be expected to die (400 roentgGw#- dnd
(vo) a few percent might become ill /100 roentgens} if
.personnel continued to live normally in these
as and.
took no special protective measures.
These percenta a
would, of course, rise within the enclosed areas. About...
25 ~ 50 roentgens are required to produce any stservable
biological effects (changes in the blood os icturek whieh
are neither serious nor cermanent. The areas eucompassed
by the AO 100, and 50 raentgen lives are 5,000, 12,500
and 25,000 square miles, resnectiveiy.
be amount of faliout drops off ra idly beyond
Meown om the map. For examy.e t.e average
lout in the United States for theentire
Me
Spring of 1954 (Operation Castle} produced
wel: @xposure or dose that was only a small fracebn of that received from a normal chest X-ray. Asa.
further point of perspective, the average radiation ex-
posure to people in tne United States each year
from
medical uses of I-rays and radioisctores, the exposure
ash gear from naturally occurring radioactive sourees,
t aes exposure from a
nuclear teats to date
ee
2stESeg
BRE oe us.
10 of a roentgen.
more)
.
esita
i
g we ab ae
ae
are roughly
equivalent, i.e.
Sh