0
5
5
a
Oo
3
}
|
|8
_
o & 10-
4
=a Sel.
a 15
_
20
20
0
4.
with some modifica-
A complete description of
these modifications and our newer
separation technique is in press.
Precipitation from the water samples
with ferric hydroxide or manganese
|
|
10
20
30
Salinity — parts per thousand
Fig.
lished procedure
tions.
|
a)
the suspended samples using a pub6
.
Salinity profiles of
dioxide scavenged any plutonium radionuclides,
281 A,
6005,
207,
Looe
3
or rare-earth radionuclides.
3
This
groundwater column at
precipitate was
FPWR 3.
then counted on low-—
level gamma spectrometers for quanti-
tative assay of the latter gammato permit rapid horizontal recharge.
The bottom water,
of course,
was
brackish and smelled very strongly
of hydrogen sulfide;
considerable
it contained a
amount
of
black
sus-
pended material of unknown composition.
All of
were
the 15-gal water samples
returned
to
the
emitting radionuclides in the sample.
155
In 55-litre samples,
Eu,
125
detected
Sb
at
3
or
241
Levels
detection limits:
6065,
2075
Am were not
above
our
lowest
0.12, 0.10, 0.15,
0.12, and 0.10 pCi/litre, respectively,
for those radionuclides.
The filter samples were dry-ashed
Lawrence Liver-
more Laboratory for processing.
and counted on gamma spectrometers;
(The samples for chemical analysis
only
were
sent
to
Dr.
R.
Buddemeier
the University of Hawaii.)
ration technique was used
GIO,
)
137,
,
Pu,
at
One sepato isolate
of water salinity.
Standardized
mixed carrier solutions
Stable carriers of Cs,
Sb,
236
rare earths, and either
243
Pu and
Am) were added
acidified samples.
Co,
Bi,
Pu or
to
the
The radionuclides
were separated from the water and
wes cia:
we
epeee
we
particulate phase were below the
limits listed above.
The ashed filters were then pro-
:
.
cessed to separate and analyze Pu
90
and
SY.
(containing
Sr,
The other
gamma-emitting radionuclides in the
and other radio-
nuclides from all samples regardless
"og was detected.
No attempt was made to separate
or determine
Fe or any beta-
ok
.
.
147
emitting radionuclides such as
Pm
L151
or
sm,
which are known to be pre-
sent in environmental samples from
Bikini’
and
fnewetak?
Atoll.