‘
-~ 17 -
It would take 53,000 particles of the size illustrated
in Table III to reach the MPLB of 0.016 uCi which results
in’15
rem/yr
to the entire
(1000
g})
lung.
However,
as
Table III indicates, these particles would irradiate only
3.4 g of this 1000 g to the lung, but at a dose rate of
41000 rem/yr-.
Thus, as Table III indicates,
these particles
result in an intense but highly localized irradiation.
fundamental question is, then:
A
is this intense but localized
irradiation more or less carcinogenic than uniform
th
~
ot
pee
ivraciation?
Alternatively,
rradiation equal
the remainder of
this
to,
is the DF for this particular
greater
section,
than,
we
or
less
than one?
review the guidance,
more apsropriately lack of quidance,
c
eOrm
In
or
for dealing with this
hot varticle orceplenm.
22/
Geesaman, Donald P,, UCRL-50387, pp. 8, 15.
22
Langham, wright u., The Problem of Larae Araa Plutoniun
Contamination, U. 5. Dent. of H. E. W., Public Heaith
Services, Seminar Paper No. 002, Dec.
24/
Long,
A.8B.,
6,
1963, p.
7.
"Plutonium Inhalation:
The Burden of
Nuclear Mews, June 1971, po. Fl.
eslicible Consecuence,"
oO
tly
tv
cb
wort
25/
Geesaman, Donald P., UCRL-50387, np. 8, 15.
Based on
aman’s model for a lung at one-half naximun inflation.
aman estimates a total of 688 alveoli at risk, each
-§ om3 in volume, and deep respiratory zone tissue density
.12 gfenm?.
24/
See
footnate
23.
zi’
Based on a lung mass of 2 standard man = 1000 g.
2t/
my:
A.
:
.
=
This assumes that the radiation field of
marticles do not overlap.
4h
the 53,000