Sa
wi
é.
. (i.e. 1 day) compartment ranges from 0.02 to 0.22 with a-mean of 0.15; for
the long term (i.e.
mean value of 0.85.
115 day) compartment the range is 0.78 to 0.97 with a
For both cases the maximum value is less than a factor
of two greater than the mean.
The 13’cs gama exposure data which is listed in table 2 shows that
the maximum exposure rate observed at an isolated point on the island 1s for
most islands less than a factor of three greater than the mean volume.
In
er
many cases the maximum observed value is only 2 times the mean value.
The
60¢5 data is more variable but it also accounts for a small portion of the
external dose over 30 years.
Previous evaluations indicate that dietary intake in a population is
lognormally distributed.
This would of course mean that x would include
more than 50% of the population.
We are currently evaluating the data in
the Ujelang Dietary Survey to see if the distribution is lognormal and if so
what fraction of the population would be included at two or three times the
mean value.
In an overall evaluation of the distribution of all of the input data,
three times the mean value includes more’than 95% of the population; in som
cases the maximum observed values were never as great as 3 x and closer to
like 2%.
Assuming the variables to be independent and thus combining in 4
linear fashion the low probability associated with values equal to or
exceeding 3 x for each of these input parameters, would lead to an extremely
small probability of all such events occurring for one person.
In summary,
the use of the mean value X for estimating the dose to
people resettling at Enewetak Atoll provides dose estimates which includes
more than half the population.
Until a more thorough analysis can be
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