HAT MIAN
proportion of contamunart fron: most surfaces
That remaining Is firmiy * ved and is not lthels
to become airborneensily
[fa personnel decon
tamination center i established ot shold be
relatively mobile and isolated from more per
manent buildings where detinitive care ds given
This stems from the fact that contamuinat.on
can only be transferred. tiet destroved. and ‘he
decontamination area is Tikes to become oyuite
“hot” ina relatively short time
Tinned goods
‘an be eaten with complete safety and ios
highly unlikely that city water <vstenis outs de
the area of blast danage v1] be conhaninaced
soon after a burst. One thing appears te be
certain—anyeffects from nterma radiation wii
be long range and will be of ne concern in the
acute period. Tot.tl body radiation from
gamma rays, and skin irradiat on from beta
emitters will be the chief radiological concer:
at early times following wo expioston
6.36
sill be
available and the falling cadiossetive mater tal
may aetually be visible
of fallout will depend or
99
ue asurably
vetter off than within the area of
ind thermal damage.
Voch reaaed to etfectiveness of shelters in the
read
trea. the following estimates have been
A frame house would reduce the total
joe cece ved by one-half, and a briek or conrete -trueture would be more effective.
A
moement would reduce the total exposure to
ome tenth of its value. Ina shelter of thickness
eqrivadent to three feet of earth, the dose would
2 rednueed to one five-thousandth of its value,
(areal
erased
forcing complete protection in the most heav\ oltaminated areas.
t should alse be noted. on the other hand,
uot Shihe tie deeay of fission product radiacosas extremely rapid over the first few min-
its after deronation, the rate of decay becomes
ersideradly less rapid im the succeeding hours
.
Phas, with fallout occurring some hours
‘he blast, .f adequate shelter is not availibe. eorher evacuation may be better than resagan partial -helter and on rapid deeay of
ve radiation field, Starting at 1 hour after
ifter
Evasive Action, Protection From Fallout
Some warning of possitve fallour
Se TURY
MADEN E] oS
\s stared. the patters
wind velocities ind
other weather conditvans. und the pattern is thus
difficult to predict imder the best of circum
stances. However, toi be apparent thar i:
closer-in areas. fallout mas dot oecur fOr sey
eral minutes after the blast aust us pertod nay
extend to several hours it sreater clistances na
with slower wind velocit eDhos.there is seme
time for evasive action
CUStaePabiOn taiterdit
woo
“roo shutements as “more than SO percent of
» hadatioy dose fron: atomic debris will be
fevered sidan of hours of the explosion time”
bee cris rf fallout occurs immediately after
»
e
fe
allow some advantaze ts oe aken ot the deca.
of fission product m diate ug osite ster ene in
tion of an area a few dive after the “a lent
141
intact. suchas water
art, ne essent, i),
ment, ete.
poser. re tenting eye
De rhs sep =
\
beste
|
sy
ou the area obvieusly will not be as
t would be for earber fallout matertal.
Estimation of the Severity of Ex-
posure to Gamma Radiation
with storing of sulficien’ food usa water t
Facilities mins. for tae cic -t
cot oectrped for several hours, the rate
beats
4 +
1
oaetoration. Ff the maximum fallout and
1iN mum expose rates ima fallout area
tlow
aainplete prera
adequate shelters
ration for anextended -ta
How-
out
peer ooclof } hourwe. a, the dose rare at Ll hours
st he sd} percent of what it was at 10 hours.
Suthigien cune probapby wo ui
be available to allow peru vey
a oaiven dose rate will fall to about
OU hours after the blast. 2 given dose
toed fal by only L) percent of its value in
eer
be given to evacuatiig tie area fF possible fill
out patterns have beer meestoeved cad ape be
lieved to be predictable
Mou tay be possitle
totake shelter
tast
bioercertoof ait» value by | hour later.
Predictions From Physical Estimates of Dose
(hoe chsolute sensitivig, of man to radia-
/
eect e hpown. and of it were feasible to de-
re the close to groups under catastrophe