4 Messerschmidia
_ © Scaevola
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Concentration in rat muscle — pCi/g, wet
~
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100
1000
Concentration in indicator plant —
pCi/g, dry
10,000
T
0 Scaevola
1,000}
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100
10
1.0
0.11.7
0.1
Fig. 170. Statistical correlation between
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10
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100 1,000 10,000
Concentration in indicator
OSr in rat bone and
Sr in
Messerschmidia and Scaevola,
the Atoll,
T
I
& Messerschmidia
plant — pCi/g, dry
Fig. 171.
Samples were taken using the
Statistical correlation between
Cs in rat muscle and 187Cg
in Messerschmidia and
Scaevola,.
following three types of equipment:
@
Air samples were taken on FRED,
Ultra High-Volume Air Sampler
(CU HVS) — 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
be found on the Atoll.
at a rate of 2000 m?/hr for a con-
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.
Typical samples were taken at a
rate between 8 and 20 m? /hr fora
106R, (1.0 yr), 1256), (2.7 yr),
Anderson Cascade Impactors (ACI)—
Cs (30 yr), 144Ce (285 day), 7?9Pu
(2.4 x 107 yr), ?38pu (86 yr), and
Used to obtain data on the particle-
241 am (458 yr).
continuous 7-day period,
e
(53 day), 9k (1.26 x10" yr), “4mn
(303 day), ?°zr (65 day), }°%Ru (39.6
are
o4 Mn,
naturally occurring activities.
9577 103 Ry 106Ry, 1255) and 1444,
size distribution of airborne radio-
activity.
“Be and 40 K
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
0.1-1.1, 1.1-2.0, 2.0-3,3, 3,.3-7.0,
to radioactive decay in the long interval
7
since testing ended. Longer-life
Cs,
and >7 um.
I-34