equipment, calibration procedures,
bias indicated that there was no
and GAMANAL are given in the Enewetak
significant. difference in the results
Radiological Survey report.
from the two facilities and that on
Most of the Bikini samples were
the average, for a series of samples,
packaged in 3.3- or 3.9-cm-high
both would obtain the same result.
aluminum cans with nominal volumes
Statistical variation does, of course,
of 95 and 210 cm, respectively.
exist in the measurement of any indi-
Isotopic activities are reported
vidual sample,
as disintegrations per minute per
the average value of many samples
gram (dpm/g).
is the important factor.
Eleven nuclides have
been observed in Bikini samples:
60 Co,
13
102
0 Teh,
106, 4,
1b
toe,
15 a
20755 235y, and
"os,
241
Am.
13354,
.
.
When these radionuclides were
but for dose assessment
In addition to the interfacility
comparison,
a series of samples ori-
ginally measured in the Biomedical
facility was resubmitted to the
not detected, upper limits were
facility at a later date for compari-
calculated by defining the upper limit
son of the analytical results.
The
photopeak area to be twice the square
data are presented in Table 3.
Again
root of the number of counts observed
there is no indication of any statis-
in the continuum normally occupied
tical bias in the data.
by the photopeak.
These comparisons reconfirm the
Thirty-one samples were submitted
reproductibility of results within
for comparative measurement to both
a facility and between facilities
the Biomedical and Radiochemistry
observed during the course of the
facilities.
The results are presented
analytical work for the 1972 Enewetak
in Table 2.
Testing the ratio for
survey.
Wet-Chemistry Analyses
amount of elemental carrier or
GENERAL
tracer,
Wet-chemistry analyses were
chemical separation and puri-
fication of the desired element,
required to quantify a number of
gravimetric or tracer yielding, and
nuclides
quantification by an appropriate
that could not be determined
by gamma spectrometry.
Briefly,
this
technique.
Table 4 presents a list of
procedure involves the dissolution of
the measured nuclides,
their half-
a sample in the presence of a known
lives, principal radiation, and