+
1000
|
3
S
Y
100
-
|
f
4 Messerschmidia
9 Scaevola
Tn
Y=1.03X\7%
om
¥ = 1.29 x0-872 jf
o
Cc
3
Zc
o
c
1.0
iw
78
~~
5
~
a
a
s
4 >
5
oO
Cc
s
“A,
oa
c
—_
.—
o
0.}
_|
1.0
|
i
10
|
100
6
5
1000
C
Concentration in indicator plant —
pCi/g, dry
Fig. 170.
the Atoll.
Y=0.73X
.
T
A
af
ye
100 ;—
7
10
_
c
2
Ig
U
1,000;-
T
T
4 Messerschmidia
a ——ee—re
Scaevola
3
ye
—
10, 000
|
Qa
10
8
P
<a
+
Es
a~
[
5
Statistical correlation between
1.0
/
‘
O14 1
0.1
4
1.0
|
10
|
100
|
1,000 10,000
Concentration in indicator
OSr in rat bone and
Sr in
Messerschmidia and Scaevola,
plant — pCi/g, dry
Fig. 171. Statistical correlation between
37Cs in rat muscle and }3?Cs
in Messerschmidia and
scaevola,
Samples were taken using the
following three types of equipment:
e
Ultra High-Volume Air Sampler
Air samples were taken on FRED,
(UHVS) — Used to sample large
DAVID, SALLY, JANET, and YVONNE,
volumes of air in short time inter-
which are islands that include the full
vals.
range of airborne activity levels likely to
Typical samples were taken
at a rate of 2000 m?/hr for a con-
be found on the Atoll.
A number of radionuclides were de-
tinuous 24-hr period,
e
Low-Volume Air Sampler (VCS) —
tected in the surface air, including "Be
Used to sample for extended periods,
(53 day), 40 (1.26 X 10° yr), o4 Mn
Typical samples were taken ata
(303 day), 957 (65 day), 103 Ru (39.6
rate between 8 and 20 m®? /hr fora
day), 10654 (1.0 vr), 125 Sb (2.7 yr),
2395)
137 Cs (30 yr), 144 G6 (285 day),
continuous 7-day period.
@
Anderson Cascade Impactors (ACI)—
(2.4104 yr), 7°8pu (86 yr), and
Used to obtain data on the particle-
241 am (458 yr). ‘Be and 7° K
size distribution of airborne radio-
naturally occurring activities,
activity.
are
54 vin,
9575 103 Ru, 1062 125o) and 144 a,
These samplers operated
at a throughput rate of 34 m°/hr,
are intermediate-life activation and
sampled for 7- to 10-day periods,
fission products found in current world-
and separated each sample into the
wide fallout, but present in Enewetak
following particle-size ranges:
soils in only very reduced quantities due
O.1-1.1, 1.1-2.0, 2.0-3.3, 3.3-7.0,
to radioactive decay in the long interval
and >7 pm,
since testing ended,
If-34
Longer-life
1ST ag