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REVIEW OF QUALITY ASSURANCE DATA
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MARSHALL ISLANDS RADIOLOGICAL SAFETY PROGRAM
The quality assurance program for the Marshall Islands Radiological Safety
program consists of replicate sampling, participation of inter-laboratory compar-
isons and repetitive activity determinations of calibrated sources.
The follow-
ing report summarizes the results of the first two activities since the inception of the program.
logbooks.
I.
Calibrated source determinations are recorded in the data
An example of this data is presented in Figure 1.
Environmental and Biological Samples
A.
Replicate Sampling:
processed and analyzed.
bioassay and environmental samples are split
The results listed in Tables |! and 2 define the error
associated in the sample analyses due to random fluctuations in analytical technique.
Individual 5-day, 24 hour urine samples were collected to determine the
biological fluctuation associated with repetitive single urine sample results in
the same individual.
B.
Table 3 describes these results.
Inter-laboratory Comparisons:
Other laboratories have participated in
this quality assurance program since 1974.
forwarded to each laboratory.
Samples are split at BNL and then
Samples may be genuine or purposely spiked
with a known amount of radionuclide before processing (Tables 4and 5).
II.
Whole Body Counting
A.
Replicate Sampling:
Replicate sampling commenced in 1978.
5% of the sample population are repetitively examined.
Currently
Replicate results are
presented in Tables 7 and 8.
Inter-laboratory Comparisons:
BNL personnel and Marshallese visiting BNL
are counted using the field equipment and the who:e~body counter of the BNL Medical Department.
Tables 8 and 9 summarize these results.