pooled urine samples from both atolls were analyzed radiochemically for 137¢5
and 0e,

Subsequent Brookhaven National Laboratory expeditions by members of

the Medical Department and Safety and Environmental Protection Division utilized
whole-body counting and radiochemical analysis of urine and blood samples to
identify and quantify the radionuclides that were present in the body.

The re-

sults of these radiological measurements are given in terms of body~burden in
Tables 1 and 2.

Throughout this paper the units of quantities are SI derived

and those which are accepted for use with the SI for the time being.

Thus both

the Curie and the Becquerel may be used as units for the quantity activity.
The aforementioned body~burden tables illustrate adult mean values for
Rongelap and Utirik.
of age.

An adult, as classified here, was a person over 16 years

The mean body mass in this age interval was 60 kilograms.

The observed

body mass versus age distribution is shown in Figure 1 for Rongelap residents.
The same body mass versus age distribution was observed at Utirik.
Because of the paucity of measurements at Utirik, information on

Co,

6570, and 93 was in some instances derived from the ratio of adult mean body
burdens between Rongelap and Utirik.
burdens for 6900,

705,

and

A mean ratio of 2.6 was observed in body

1370, after they reached their maximum values.

The

standard deviation of this ratio was 154
In the following analysis, personal body-burden histories and residence intervals,

in conjunction with contemporary dosimetric models, are used to esti-

mate internal dose.

Dosimetric distributions were constructed from the results

and a summary of the derived activity ingestion rates and dose equivalents was
provided for various subgroups of the population.

Additionally, exposure rate

th

history curves were constructed for each atoll for the period following the

Select target paragraph3