.
‘F&s. Ruth Van Cleve
September 28, 1979
-2-
Altho~gh the data base for the potential exposure estimates is not yet
complete (e.g., the island of Lujor had not yet been factored into the
dose calculations), it is not expected that additional information will
substantively alter the exposure estimates; should this occur, however,
we will immediately inform you.
The calculated radiation exposure levels for living only on Enewetak,
Medren and Japtan islands are:
Maximum Individual
30-Years
with importedfood
11 millirem/year
100 millirem-bone marrow
69 millirem-whole body
without imported food
24 millirem/year
220 millirem-bone marrow
120 millirem-whole body
If it is assumed that 15% of their time is spent on the northern islands,
and that 10% of their total intake of coconut meat/milk originates from
the coconut trees of the northeastern islands, the calculated radiation
exposure levels are:
30-Years
Maximum Individual
with imported food
28 millirem/year
250 millirem-bone marrow
200 millirem-whole body
without imported food
51 millirem/year
460 millirem-bone marrow
270 millirem-whole body
For purposes of reference, it may be recalled that U.S. exposure criteria
are:
Maximum
exposure to an individual in any one year:
-.
Integrated 30-year exposure level:
500 millirem
5000 millirem
Because of the uncertainties and assumptions which are inherent in deriving
radiation exposure estimates of this nature, the Atomic Energy Commission
Task Group report recommended the following exposure limits for planning
and cleanup purposes:
Maximum exposure to an individual in any one year:
Integrated 30-year exposure level:
4000 millirem
250 millirem
....;
.