mates at odds with other analyses for all atolls studied. The wind data needed for this

approach are too sparse, leading to results that are not credible (Reference 22).
INTERNAL DOSE
The current Brookhaven report has a number of features that make it useful for
comparison with internal dose estimates for the Rongerik servicemen: closely related
urinalysis data for the Marshallese and the servicemen are utilized in similar internal

dose methodologies; the latest thyroid dose estimates (to the Marshallese) exceed any
of the referenced previous estimates; and use is made of ICRP~30 (Reference 14), a
likely foundation for the present analysis had all of the metabolic and dosimetric

information for specific radionuclides been published when this work wasinitiated.
Both the Brookhaven and the present assessments utilize I-13! counts from
urinalyses

to

arrive

at

initial body

burdens of I-131.

From

this, Brookhaven:

determines the levels of other iodine isotopes that lead to thyroid dose.

The present

analysis goes beyond, with use of Reference 11, to determine the levels of radionuclides generally, and from them and References 16-18, the doses to all relevant

organs.

Thus, the central comparison is afforded by the specifications of iodine

metabolism and how they influence the estimates of initial I-131 body burden.
The common basis for the ORNL-TM-190 (Reference 16) and ICRP-30 (References 14, 15) treatments of iodine metabolism is Reference 23.

TM-190 has applied

the Reference 23 prescription numerically as a function of time for various body
compartments; ICRP-30 gives approximated time constants for these compartments,

from which the user can develop functional relationships.

When this is done, the

agreement between I-131 body burdens deduced from ICRP-30 and TM-190 is good,
especially with the approximations taken into account.

However, this agreement

exists only for the latest version of iodine metabolism expressed in ICRP-30, Part 3
(Reference 15).

Unfortunately, Brookhaven

referenced ICRP-30,

Part!

(Refer-

ence 14) as its source of metabolic information, which has since been acknowledged as
incorrectly stating the iodine parameters (References 15, 24). Whereas the difference
has a minimal impact on the principal ICRP-30 mission of determining annual limit

29

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