213Principles of Nuclear Explosive Devices and Debris Analysis
composition of nuclear explosion debris strongly inuences the selection of methods
f
or
s
ample
p
reparation
a
nd
d
issolution
p
rior
t
o
e
nsuing
N
FA.
Section
5
.4.2
d
iscussed
t
he
e
arly
s
tages
i
n
t
he
e
volution
o
f
a
reball—those
l
ead-
ing
t
o
g
eometric
a
nd
c
hemical
f
ractionation.
D
uring
t
he
s
econd
o
f
t
ime
i
mmediately
f
ollowing
n
uclear
e
xplosion,
t
he
e
nvironment
i
n
w
hich
t
he
w
eapon
w
as
d
etonated
does not strongly affect the evolution of debris formation [30]. We have practical
e
xperience
i
n
a
ll
a
spects
o
f
d
ebris
a
nalysis
a
ssociated
w
ith
n
uclear
t
esting,
r
ang-
ing
f
rom
f
ar
b
elow
g
round
t
o
e
xo-atmospheric,
a
s
w
ell
a
s
e
xplosions
w
ithin
m
any
d
iverse
me
dia,
i
ncluding
a
ir,
s
oil,
w
ater,
a
nd
s
alt ...