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these are particles of radioactive
fallout and this is how a single
particle looks magnified several hundred
times a radioactive piece of matter from
a nuclear
explosion these few particles can't do
us any significant
harm but should there be a nuclear
attack many billions of them would fall
from the sky and settle to Earth
releasing radiation that could cause
sickness or death in the area where they
fall
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e
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o
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to begin with it may be surprising to
know that radiation is something we live
with every
[Music]
day far back in
time back before there was an
earth there were flaming Fireballs in
space we call them Stars
and there are millions upon millions of
them each star like our own sun is a
raging nuclear furnace that shoots out
Showers of particles too tiny to be
matter as we conceive it along with
invisible forces that we call
radiation this radiation and these
particles travel through space at
Fantastic speeds until they strike some
other matter which may make new flares
of
radioactivity they strike wandering
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asteroids moons and planets such as our
own everything in space Earth included
receives this
radiation Sky partly cloudy this
afternoon clearing
by by background radiation is all around
us in tiny
quantities nature even planted unstable
atoms deep inside the Earth
itself they Decay one by one here and
there in a barrage of inconceivably
small and Silent
explosions each explosion is another
spark of
radiation all life on Earth has reached
its present form in company with
radiation from this naturally occurring
radioactivity extremely thin with
extremely lowlevel intensity it has
always been with us it is nothing
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new we don't worry about the small
amounts of natural background
radiation but the safely handle larger
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amounts we must keep our distance and
shield
ourselves for as the amounts
increase so do the
dangers the amount of energy generated
by a nuclear explosion is
enormous near the crater area There is
almost total Destruction from blast in
heat and now large amounts of pulverized
debris and molten Earth are pulled up
into the mushroom
cloud this is where radioactive fallout
is
formed the radioactive atoms produced in
the explosion joined with the particles
of Earth and
debris the mushroom shaped cloud forms
and climbs
higher if it now contains billions of
Highly radioactive particles of matter
that we call
Fallout the Strong Winds of the upper
altitudes go to work on the cloud
blowing it off in one or more
directions gravity tugs on the
particles the larger and heavier ones
sink toward the ground while the lighter
particles continue to drift With the
Wind some of the lightest particles
remain suspended in the upper atmosphere
as time passes their radioactivity grows
weaker so that the longer they remain
Aloft the less dangerous they
are but the heavier particles spread by
high altitude winds fall to the ground
within 24
hours several miles from the explosion
they are about the size of table salt or
fine
sand these are the most dangerous
because they carry the greatest number
of radioactive atoms and so emit the
largest amount of nuclear
radiation which brings us to an all
important fact deadly as radiation can
be it has a fortunate weakness a rapid
rate of
Decay and this gives us an invaluable
Ally
time suppose a nuclear explosion takes
place at 12:00
noon by 1:00 the total force of the
residual radiation is at a high level
by 7:00 it's down to
1110 in 2 days although still dangerous
it's only 1 100th but in 2 weeks it's
only 1 1
1,000 with this Decay rate in mind
consider radioactive fallout conditions
which might confront us after a massive
attack within an hour Fallout would be a
serious ious problem in the vicinity of
explosions which occur on or near the
ground by 7 hours after the attack the
fallout area covers more and more of the
country as the prevailing winds expand
the Fallout in a downwind
pattern 24
hours 48
hours without shelter Millions would
face
death a few days later those who have
taken shelter will
survive in many areas people can even
leave shelter for brief periods of time
to carry out important
tasks within 2 weeks most people can
leave their shelters for longer periods
as the radioactivity decays to lower
levels the lesson is obvious we must
Shield ourselves from radiation through
the dangerous
period
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to do this we need more than
time fortunately we have another
Ally
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distance the greater our distance from
The Fallout particles the less radiation
we
receive you would receive less radiation
in the middle of a tall building than
you would receive on the top or bottom
floors because there would be more
distance and partitions between you and
the source of the radiation The Fallout
particles which would cover the roof and
the ground around the
building only an insignificant amount
would get
inside and finally along with Decay rate
and distance we have still another and
very important
Ally
Mass when highly radioactive fallout
covers our immediate area we can Shield
ourselves through the the most dangerous
period by using the sheer weight of any
material but the protecting material
must be heavy to Shield out some 99% of
the radiation you would need about 5 1/2
ft of
wood or 2 ft of
Earth or one and 1/3 ft of
concrete or a/t of
Steel even even though the thickness of
these materials varies they all weigh
the
same taking a house as an example it
offers a small amount of mass and
distance from radiation but not enough
protection in an area of heavy
Fallout the solution is plain Fallout
shelters are the best defense against
nuclear
radiation whether in a home for a single
family
or a large community type in an
apartment
building they offer the kind of
protection from radiation you would
probably need in case of a nuclear
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attack but the best shelter would be
worthless unless it was
used most people find it hard to
understand how silent invisible rays
which cannot even be felt could be so
damaging let's see what happens when
radiation penetrates the body and
attacks the
cells what is a cell and what happens
when it is
attacked it's a simple organism which
reproduces Itself by
dividing our bodies are made up of
millions of cells they are the building
blocks of our Blood and Tissue
issues now powerful radiation strikes
and cells are injured or
destroyed if radiation stops before the
accumulated dose is too great almost all
of the damage eventually will be
repaired if radiation continues there
are some cells less able to function at
top
efficiency should the body fall behind
in its recovery severe illness or death
could result
the key then is the amount the total
dose of radiation
received we measure radiation the same
way speed is measured by a
speedometer only instead of a
speedometer we have a rate meter and
instead of miles per hour we measure the
rate in rkin per
hour we need another device called a
dosimeter to record how much radiation a
person has accumulated over a period of
time in the same way we record
accumulated distance in
miles the dosimeter records accumulated
dose in
[Laughter]
renkins with this in mind let's return
to background
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radiation
in an average lifetime a person might
expect to accumulate about 10 renkins
from his natural
environment not enough to affect his
health this same healthy person would
need medical care if he received more
than 200 renkins within a few
days 300 renkins in the same period
would cause severe radiation sickness or
possibly death
and as we go beyond 300 renkins the
danger of death increases
rapidly so now we see why shelter is
vital the difference between
accumulating a large dose because of
little or no shielding and a small dose
because of adequate shielding is the
difference between death and
life no clothing of course could
possibly provide enough
shielding
however if you were to be in the open
during Fallout conditions clothing would
keep the particles from touching your
skin there is no such thing as a Fallout
suit but ordinary clothing would help
until you could reach the safety of a
shelter then the Fallout particles can
be brushed off and outer clothing
removed if Fallout settles on your food
the food itself is not harmed since
radiation damages only living tissue and
you can easily decontaminate it using
almost the same methods you use in
everyday food
preparation actually even if you
accidentally swallowed some Fallout
particles it wouldn't kill you the
effects if any probably wouldn't show up
for
years still since there is a possibility
of long-term effects such as shortened
lifespan cancer or hereditary damage
it's wise to remove the Radioactive
particles by simply washing wiping or
peeling but it's vital to remember this
neither water nor chemicals can destroy
radioactivity The Fallout particles can
only be moved or washed
away only time can reduce their
potency and what of water well here
again the same rules apply
if necessary you could drink water
containing Fallout particles without
worry or immediate harm the chances are
you wouldn't have to for long for water
helps to wash itself through the natural
processes of sedimentation and
filtration and swiftly moving Rivers
like this would carry most Fallout
particles
Downstream in Still Waters most
particles would settle quickly to the
bottom others might remain suspended in
the water for a long time while a small
percent of the radioactivity would
dissolve the normal processing of a
water treatment plant would make it safe
to
drink and water coming from a covered
well would be safe from radioactive
contamination the there is no problem
with breathing for air is not
contaminated once the Fallout is on the
ground Fallout is not a poison gas if
ventilation is needed in a shelter a
simple inverted U fitting on a
ventilating pipe would keep Fallout
particles from entering the pipe and
getting
inside of course surviving a nuclear
attack means more than just waiting in a
shelter for radioactivity to Decay to
Safe level
survival reconstruction and Recovery
would involve decontamination in many
areas a very difficult
job unit8 at Elman Morse dose rate 15
renkins per
hour okay
unit fall out would have to be removed
from important areas by street
sweepers
and the remaining particles could be
flushed out of the
[Applause]
[Music]
way food would be a problem after a
nuclear attack we would first use
existing Food Supplies from shelters
markets and surplus food storage
when Fallout had decayed to safe levels
people could begin to work in the fields
for limited periods of
time in a few areas the land would not
be suitable for food but such crops as
cotton could be
[Applause]
grown crops for human consumption would
be grown in areas that had received the
least Fallout
the reason we would be able to grow and
eat food planted in this land is that
the transfer of radioactivity from soil
to plants is extremely
low
and so if nuclear attack should ever
come in spite of every effort to avoid
it we must be able to survive and
rebuild for the
future but survival can only come
through
knowledge the basic facts we must all
know are relatively
simple first there is nothing new about
radiation it has always been with
us what is new is the vast amount we
would be exposed to as a result of
nuclear
explosions much of this danger would
come to us in the form of
Fallout but we are not without personal
weapons or
defense one of these is
time radiation decays and so we would
not have to take maximum precautions
indefinitely
another defense is
distance radiating particles 50 ft away
for instance would not affect us as much
as particles a few feet
away and our third defense is
mass any material with enough weight
will keep the penetrating Rays from
hurting
us the greater the weight of the
material between us in the particles the
safer we would
be the best way we can use all three
weapons of defense is with an adequate
shelter thick enough to Shield off a
good part of the radiation until it has
decayed to safer
levels when radiation attacks the cells
of our body are damaged most of them can
repair themselves if the total dose over
a period of time is not too
high even though the rays penetrate our
bodies causing damage they do not infect
us and make us or anything else
radioactive that's why food remains good
no matter how much radiation has passed
through
it Fallout accidentally swallowed with
water or food will do you no immediate
harm but for long-term safety it's best
to wash wipe or peel the food and filter
the
water even if you were caught outside
under Fallout conditions ordinary clo
clothing would keep the radioactive
particles from touching your skin but
you would still need to find shelter
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quickly if we remember these facts if we
act on them
intelligently we can increase our
chances of surviving nuclear
attack and the key to survival is
adequate
shelter that is why the federal
government has a nationwide fallout
shelter program
the goal is adequate fallout shelter
space for every man woman and
child and this goal can be
reached for with knowledge of radiation
we can face the facts about Fallout take
action to protect
ourselves and learn how to live in the
nuclear
[Music]
age
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