Teet em ee ee
omen
- 39 -
.
Positive counts were obtained for 14 of 21 persons
measured.
These counts suggested chest burdens ranging
from 3 to about 10 nCi.
However, in no case did the
estimated cnast burden exceed the MDA at the 95% con-
fidence level.
Seven of the 14 subjects with positive
chest counts had estimated chest burdens of 7 nCi or
greater and mav be considered (at the 68% level of
coniidence) to have statistically significant chest
buréens of from 7 to 10 nci.68
Since the plutonium is still in the lung cavity, 27 vears
in tne
o=
Pp.
sost-exsccsure,
it 15 correct to assume that it was initially
insolunle form and hence pertinent here.
this measurement,
however,
most of
exvectec to be in the lymoh noces.
69
At the time
the material would bea
Nevertheless, we coulda
particle burden in these subjects fron
tnese G€ai2 if we xnew the initial particle size at the time
Tne nature
This particle size Gata is unavailable.
~~
ison.
of the contaminating events suggest that the
particle size micnt nave been somewhat larger than those tnat
result from oslucsnium fires where most of the respirable
activity resiaes on particles in the size range of 0.1 u to
2.3 u in diameter.
Much of the contamination of the
43/
[JOPP Dublicarion 19, The
Piuconitum and Qcnar Actnides,
“3/
Mann, d.R.
and A.R.
Netabolisn of Comsounds oF
Pergamon Prass, Mew York, 1372,
Kirchner, Oo. cit., p.
880.
p.
7.