OFFICIAL USE ONLY
1
"Tissues of a few marine specimen were analyzed for Cs st (37-year
helf-life) since this nuclide was present in high concentrations in
water and coconut milk from this area.
The tissues of the roosterand
1
of the coconut crab contain significant amounts of Cs oe A very high
1
fraction of Cs 3t activity was noted in the muscle of the rooster (40
Further radioanalysis of marine specimen
percent of the total beta). *
indicated that the rare earth group constituted a few percent of the
total beta activity.
put_ey
106
:
:
|
and Zr?°-Nb?” contributed the largest
percentage of the total beta activity."
The AFL reports:
0
"---The sr’
values for food plants, except coconuts,
collected in October 1955 approximate
theoretical porportion of mixed fission products activityapt 1.7 years, 4 percent. Coconuts contained 0.1 percent Sr7~
with appropriate
correction for time of collection.---
"ee-In contrast to the strictly marine forms,
eocorut
crab, which feeds principally on land plants, had Sr” levels
«
of 3 percent in the muscle and 12 percent in the hepato-pancreas
or liver, where calcium salts are stored.. The radioisotopes in
salts geached from the carapace were found to consist entirely
of sr?) =
y”,...
:
"—-Radionuclides of Sr, Cs, Ce and their daughters did not
account for the total activity in most (fish) samples analyzed.
. Complete fission product analyses of samples collected at
Eniwetok and Bikini Atolls indicate that non-fission-product
radionuclides may account
for more thanhalf of the total
activity in some fish. Zn’
contributes one-fourth or more of
the total activity in shark muscle as determined by radiochemical
analysis and confirmed by following the decay.”
(zn®5 is not a fission product.)
The two year survey byNRDL continues to indicate the high
* See Section IV
OFFICIAL USE ONLY
5002119