ee
activity on any island is about a factor of 10 higher than
Rongelap.
10. The Rongelapese go on fishing expeditions to other
tslands,
including those showing both higher and lower activity.
However, these Rongelapese spend an appreciable part of their
time in boats over water where the external gamma activity is
near bacground values.
Thus,
the yearly average for these
probably would not differ greatly from those on Rongelap Island.
11. Food Supply.
The basic data on the normal food supply
of the Rongelapese are contained in the Table One attached as
Annex "B" to Appendix "A",
here are wide variances in the
data so that estimated average values are used.
This is not an
unreasonable approach since it would be expected that the food
actually consumed would be about as variable as the individual
samples collected for
analyses.
le. The isotope of principal concern in the food chain is
strontium-90.
For an adult worker the maintained maximum
permissible body burden is 1000 Sunshine Units
curies of sr99 per gram of calcium).
(1000 micromicro-
Values for maximum per-
missible exposures to the general population are 1/10 that for
adult workers ,
body.
or 100 Sunshine Units, maintained level in the
The National Academy of Sciences report stated "--- There
seems no reason to hesitate to allow a universal human strontium--
burden of 1/10 of the permissible---" for adult workers.
This
corresponds to the 100 Sunshine Units.
13. Table One indicates that the average concentration of
strontium-90 in thetotal food supply might be less than 360
Sunshine Units.
(The data on land crabs shown in Table One are
-8-
of Energy
ent Office Appendix "A"
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