snapper.
These differences appear to be independent of location and the level
of contamination and much more dependent on species.
Arithmetic mean concentrations of 239+240py, 238py, ang 24lAm in edible
muscle tissue from all
fish collected at Bikini
between 1977 and 1984 are shown in Table 10.
during different periods
The results also show that there
has been essentially no change in the mean concentration of 238+240py quring
the years of collection.
Mean concentrations of the transuranic radionuclides
in the flesh of fish from Bikini Atoll are a fraction of a pCi/kg wet weight.
Barring any major impact on the lagoon environment that might affect the
availability of the transuranic
radionuclides to marine organisms, mean
concentrations in the flesh of fish collected”over the next 10 to 20 years
should not differ greatly from present-day values.
equivalent
to
radionuclides
the
in
bone
the
marrow
of
individuals
fish-flesh-ingestion
The 30-y committed-dose
from
the
transuranic
pathway (using 200 g/d as the
ingestion rate and the mean value for flesh concentration) ranges from 3 to
6 mrem.
This range results from increasing the adult gut-transfer coefficient
for plutonium? from 1 x 10-4 to 5 x 1074.
In fish with relatively high body burdens of 239+240py, the 238pu to
239+240py activity ratio in the muscle and other internal organs was usually
higher than the activity ratio found in the material ingested by the fish.
In
many cases, the error associated with the measurements of 238pu was large, and
it could be argued that the differences among the samples were not real.
Table 10. Summary of transuranic concentrations in the flesh of all fish from
Bikini Atoll.
pCi/kg wet wt 4
Arithmetic mean
Range in values
1977-1978
0.39+0.34
1977-1981
0.37+0.32
1977-1984
0.29+0.30
1977-1984
<0.007-1.1
0.020+0.021
<0.002-0.08
0.18+0.28
<Q.01-1.1.
4 If the radionuclide concentration was below limits of detection, the value
Of the concentration was not included in the average.
9000513
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