1 O00 F-
cot
t
T
-
©
p
>
;
=
2B
|
5
}-
a
Cc
@
_
m7
S/c,
4
79s,
1)
(2) 7
<
vo
y
ratios
HFH 4,
Enewetak,
,
239,240
Pu
concentra-
tions in the surface groundwaters of
_
|
any island and its median soil inventory.
4
The relationship
is
é
239,240), (fCi/litre) in
10
filtered surface ground-
J
water =
?
70
the center
we developed a relationship
between the mean
4
qld
north of
From our groundwater studies at
4
J
and HFH 5,
baseline road.
=
4
(averaging 0.004) are found
in the groundwater at wells HFH 3,
:
a
In
Pu levels.
40
238.
239,2
9, We oy
Pu/f
lowest
the
general,
|
(8)
239,240
1.34 of the
7
“a
L
o
<
Tr
J
¢
SE
Cc
~~
(4)
r
0
oH}
;
100
oS
+>
|
|
|
72
7A
76
(8 £ 4.9 x 10°?)
dg
39,240), (mCi / kan”)
in
the respective island soil
column to a depth of 125 em.
If
Year of collection
this relationship is applicable
to any Pacific atoll where similar
Fig. 5.
Changes in groundwater concentrations of 43/cs and
Sr with
time at Bikini Island.
Numbers in
parentheses are the number of samples analyzed.
in the groundwater reservoirs
if
mechanisms are moving plutonium to
the groundwater reservoirs,
be used
the
to predict soll inventories
from groundwater data.
The mean
centration of 239,240), ,
in
fraction
is 27.6 ([Ci/litre.
ulations using this water are to be
and
properly assessed.
estimate
ment of
Sou in
.
concentrations
a
238
The
Pu
of
38
-
concentrations
Pu are
.
in
tion in
.
low.
6.4
the median soil inven-
The mean concentra-
the groundwaters at Iineu is
fCi/litre which,
median
-~L7~
wt
that
relationship,
the
soluble fractions average about
é
Using this value
the above relationship, we
x 10° mCi fem
the measure-
the water samples,
;
the
soluble
tory on Bikini Island is 3.5 + 1.3
there are significant
errors associated with
the
con-
in the Bikini groundwater
long-term radiological doses to pop-
Although
it can
soil
with
indicates
burden
on
the above
that
che
Eneu will
be