radionuclides and pathways on the overall picture of radiological assessment
for habitability at this time, and to provide data and interpretations which
will guide clean-up assessment,
These data, however, will not, in all cases,
be sufficient to predict potential dosages over the long-term.
This point
is made to emphasize that limitations in the data base may exist which will
not allow detailed pathway modeling and projection of infinite future dosages
in all cases,
Previous studies at Eniwetok provide a basis for developing a list of
radionuclide species to be encountered in the measurements program (see
Table 2).
This list may not be complete, and the study may turn up other
induced activities,
Nevertheless, it is most probable that a small number
of radionuclide species will lead to the majority of significant dosages
as was found for Bikini.
In addition to the transuranics, we expect
90
Sr,
13Tog, 606, and perhaps 9749 e to be major contributors to dosage, depending
on the pathway considered and the circunstances.
Most of this work of assessment will be straigntforvar’ and will consist
of applying food~chain and dosimetric data well in hand in the literature and
available in such sources as ICRP No. 2.
However, we recognize the importance
of the results of the measurement program in penerating new information on
the transport and fate of the heavy elements and we also recognize our re-
liance on other current research and evaluation activities in the areas of
heavy element biological distribution md dosimetry in man,
We plan to work closely with DBER and groups such as the NVOO Applied
Ecology Group and the AIBS Advisory Cormittee on Plutcrium, particularly to
interpret the significance of plutonium in the context of habitability and
clean-up.
III.
EXTERNAL DOSE AND SOIL SURVEY:
This soil survey plan is based largely on the draft plan dated
31 August 1972 developed through consultation among the following individuals:
Drs. Seymour, Held,
Nelson, Welanda, and Schell (Univ. of Wash.), Drs.
Eberhart, and Gilbert (BNW), Mr. MeCraw (DOS), and Mr. Lynch (NVOO).
The survey has been divided into four phases.
Phase I is designed to
identify any unsuspected radiological problems on the least contaminated
islands.
Phase II includes
islands which have been subjected to fallout to
various degrees (minor to somewhat severe) and conrtruction activities which