:
:
.
.
gift
Dr.
Bair from a paper given by them last October (Sanders, C.L., 1970).
‘
ides
He I
i
.
sat
waidt
Rair and his colleagues have done the most relevant plutonium oxide inhalation cxperiments.
4
42iah,
"Nonunifoerm irradiation cf the lung from deposited
radioactive particulates is clearly more carcinogenic than uniform expo-
vrae beta-irradiation.
+
.
sure (on a toial-lung dose basis), and alpha-irradiation is more carcino-
genic "
The dceses required for a subciantial tumor
incidence, are very high, however, if measured in proximity to the par-
«
a dose-effect curve.
.
.
a:d, again, there are no data to establish the low-incidence end of
e
And there is no general theory, or data on whichto
.
ticle;
oe BIN! NETO MWR DE NSTGEOS SRSTAaOROO
base a theory, which would permit extrapolation of the high incidence portion of the curve into the low incidence region." | agree and J suggest
-
< shee SpeFESS
om vowechoreremanence.
rewtmnmnanna seerorunaror
FEbetEG
that in sich a circumstance it is appropriate to view the standards with
extreme caution. °
“
There is another hazardous aspect of the particulate problem in
In case of an aerosol depositing on
a surface, the material may be resuspended in the air.
This process is
wih
which suostantial uncertainty exists.
crudely described by a quantity called a reeuspension factor which is re-
ok
~
problem is to say there is some evidence that plutonium particles become
attached to larger particles and are thercforz no longer potential acrdsols.
Unfortunately there is also evidence that large particles generate acro-
eoatite turbulence, and are heace blown abont more readily, snhan
Aa
“f
mem
SPE OR, CAE Th STOPS SEITAO
better than this for plutonium oxide, but the handiest way to dispatch the
wwe owen ope,
Undoubtedly it can be pinpointed somewhat
@
markable in that it seéms generally known only to within a factor of bil-
lions (Kathren, R.L. .1968).
o
ig!
POF we 18M comme
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op
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,
,
1-162
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