- 33 Laskin, et al, indicate a significant carcinocenic response
in the luna at 1400
of lung tissue?®.
rem, succesting a comparable sensitivity
Geesaman indicates that the tissue revair
time in the lung is of the order of one year’,
It therefore
seems aDprooriate, Sut not necessarily conservative,
to accept
as guidance that tnis enhanced cancer risk occurs when particles
irradiate tne surrounding lune tissue at a dose rate of 1000
rem/yr or more.
.
58
19090 raemn/vear to the Surrounding Lung Tissue
Particle
Activity
ee
{oCi)
Particle Diameter
239...
Prd5
2383..,
Put?
3/4 max initlsczed
(138 alveoli}
0.14
0.3
0.12
1/2 max inflated
( 63 alveoli)
0.07
0.5
0.93
0.02
0.4
0.06
Closest 29 alvacli
id
Laskin,
57/
Geesaman, Donali >., UCPrL-50387, Co. Cit, 3-
33."
Tbid
33
37/
NA
wwe
@2
41,
23.
cit.
=e:
i <4
Jepdees
1°
iOy
Based+.uron sracitic
activity
given
ate
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y
we
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