Biomedical&

Environmental

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Livermore National Laboratory

410002

September

18, 1984
R

Ih. Wi-Uiam BaA 6 Rog Thomph on
Paci@
Notihwcwt L.abozatotiti
Ba.tdh
Av enw
Rich-land, Wa.
99352

Dear Rog,

Enclosed is the report on the resuspension study at Bikini.
You will note
that Table 7 on page 19 of this report is the table that was included in the
Bikini dose assessment report UCRL-53225.
The problem with the units in
Table 1, page 8 of UCRL-53225 is that the micro (p) symbol was omitted from
the units of both the dust aerosol column and the soil Pu activity column.
Thus, the units for the dust aerosol should be pg/m3 not g/m3.
Similarly, the units for the soil Pu activity should be aCi/pg (which is
proportional to pCi/g) and not aCi/g. This was done to make a direct
calculation possible for pulmonary deposition in aCi/h; sorry for the
confusion.

I have also enclosed (Enclosure 1) a comparison of the dose methodology for
bone marrow and endosteal cells for surface deposited transuranics for the
Spiers and ICRP models.
The values we use for the parameters in the lung
model are those listed in ICRP 30, Part 3, and attached as enclosure 2.

Sincere-ly,

William L. Robison
Section Leader
Terrestrial & Atmospheric

WLR/mt
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