=
4,
lees Shhlirrrsn
the averey2 individusl during a large fractior
formation cin be tolerated by
of tis lifetime vithout any injurious effects.
The mtst offective protecting from these penetrating radiations is
frem the source,
However, in cases where the distance becomes
ter than the handling techniques sllow, then massive shielding and
semote ecntrol of handlins cevices are usedo
The other main reyuirement is that racioactive contamination
must be
cortrolled so that there is no unwanted migration of radioactiv&éty into
pleces where it may harm persons (i.e. by accidental or unknowm ingestion,
inhaletion, or irradiatioh}
cr where it my harm experimental work or product:
Since radicactiviuy is slweys ascecisted with matter, the prevenion
Lope gat,
a
arceully af
cisilsl we;
(e feeslun of
f
rf.
~
ped
4
b
6)
ct
io
to
yy
oO
=
y,
t
iy
—
ereslln difters trex the norual prob
%
of ctntestortion tceomes a pecblecn of catericl control,
However, this
control in thet the
ws
ewes
Loe
ee
eee
.
tora
r
=
rongs
JS downward to o.1h frec’ions of » microenicrogm
a million milidosath: of a rrem),
4
n
ma TTA
27
t~
.
.
teat
at
:
_
rou
aed
oe
2
gto’
%
bud Qinbrel
afPrP th
vnese
svpmicro.copie
end
invisiile
quantities
of
we,
dos
7
eolorted.s
rowan
ete
moth
te
ve
Lo ee pont
begemea
ciafices
to
the povuluus
of beocteriolozy
ype See
combirsd,.
co, tamin
-
mtn
ve
potpe vn
tpn 2
Meat?
a
Uovevor,
valike
Jovectlors
or
pA?
and toxicclogy
2
nan
~ =
3
22
ae
polscsncas
ceterials,
recicactive
“ism muct be contat ed do vtucs 2% camot be killed or meutralized.s
f
rages
oe
a”
FF
3
soma
ak
ert
:
2
.
The votuction ef uny iv ciovobive contrinine Lion dapends upen the hslf-life
of the metericl, its decay prolucts or ius comclete renoval.
fms problem of disposal of redfusctive waste neteriels scems, at the
outset, to the incividual working with relatively smel1 amounts of these
problems,
. miner fcoctor eomparcé te his immediats general research
ar4
materi3is as
a
Nevertheless, when the sum totel of all the radioisotopes used
in the entire country is considered, the émount becones large and the ine
‘iveriminete disposal cver the years may result in serious contamination
ny
( :)
of wat.ur shedse
The disposal probelm kas been recognized for its