Mrs. Ruth Clusen

2

May 29, 1979

organ burdens by year for individual radionuclides that are expected to be
significant contributors to the total dose to people. Further, estimates

of dose by year should be prepared for each individual radionuclide and

each source of exposure in addition to aggregate annual and cumulative
dose. Whenever possible, some estimate should be made of the expected
uncertainties in radionuclide burdens and dose. Provision should be made
for rigorous documentation of all dose and risk calculations. Because of
the importance of the dose and risk estimates, provision should be made for
Livermore to provide their input data to other institutions allowing the
other institutions to verify the Livermore dose and risk estimates.

Concurrent with development of the post-cleanup dose and risk estimates a
detailed plan should be developed for medical and radiological followup
activities in Enewetak. This plan should clearly indicate the objectives
of each proposed activity, the responsible party and how the objective will
be achieved. Where practical, there should be linkage between the postcleanup dose and risk assessment and the medical and radiological followup.
For example, plans for whole-body burden measurements and urinalysis for
90Ssr and Pu should link back to estimated body burdens and urinary excretion
of radionuclides.
The plans for conducting a post-cleanup dose and risk assessment and for
medical and radiological followup are obviously dynamic in nature. They
will change as new information is obtained. The Advisory Group is available
to review the plans and offer comments on them as they are developed and
implemented.
The Advisory Group recommends increased participation by statisticians in
LLL's post-cleanup transuranic and fission product dose assessment for the
Enewetak Atoll. At the present time statisticians do not appear to be
involved in the dose assessment effort other than to provide LLL with
environmental concentration data for their data bank. Specifically,
statistician activities should include (a) statistical analysis and summary
of each island's data for inclusion in the dose assessment report, (b)
assisting LLL modelers to place estimates of precision on dose estimates to
the extent possible, (c) reviewing dose assessment calculations and the

final dose assessment report to verify that soil concentration and other
data are used and presented appropriately, and (d) any other activities
necessary to assist LLL in providing a dose assessment of the highest
scientific standards.
Although not discussed during the meeting, some members of the Advisory
Group have expressed concern that procedures for certifying completion of
the cleanup have not been agreed upon. This should receive immediate
attention.

2.

Coconut Planting - Copra Production and Use for Food
e

Copra Production

Confirmation is needed on the distribution of radionuclides between
coconut meal, oi] and residues following product production. Since

ae aEY: oo

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