TABLE V
Rocky Flats Exposure*
Number of
Cases
Total Lung
Burden (uCi)
1
0.272
0.033
137,000
1
0.160
0.0193
79,000
1
Q.111
0.013
54,000
3
0.064
0.008
33,000
0.024
0.003
12,500
19
;
Hot Particles
Luna Burden (uCi)
J
|
Number of
Hot Particles
*
Mann and Kirchner presented the lung burdens as number
of MPLB.
These have been converted to uCi in column two
using MPLB=0.016 uCi.
(For the groups with 3 and 19 cases,
The hot
we selected the midpoint of the reported range.)
particie burden
in colum chree was estimated by multiplyina
the tetal burden by
0.17,
particles above’ 0.6 u,
the
fraction of
and 0.70,
the
activity on
the fraction of initial
deposited activity that was involved in long term retention in
the lung.
Based on particle size data reported by Mann and
Kirchner, we estimate the average hot particle activity is
ancut 0.24 pCi.
lie munbercs ci not particles in the last column
were obtained by dividing the hot particle burdens in column
three by the average hot particle activity (0.24 pCi).
r
Allowing a risk of cancer equal to 1/2000 per hot
particle,
suggests
that the individuals whose exposures are
presented in Table V stand a very high chance of developing
lung cancer -- the probability is essentially unity.
In
this respect, it is significant to note that in the experiments
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