fy
with half times of 1 and 115 days, with 15 percent of the intake going to Soy Sy
the 1 day compartment and 85 percent to the 115 day compartment.
These
data are consistent with preliminary data obtained by Brookhaven National
Laboratory28 on the half time of the long term compartment.
The
average of 19 Marshallese males showed a mean of 120 days with a range of
75 to 182 for the long term compartment.
For 18 females the mean value
is 109 days with a range, of 50 days to 630 days.
The model for ®%o is a three compartment model with half times of
6 days,
60 days and 800 days with 60 percent,
20 percent, and 20 percent
of the intake respectively.
More detail and example calculations for 137 Cs and 60 Co are
given in Appendix D.
Transuranic Radionuclides Metnodoalogy
Inhalation.
The inhalation model used for the various
isotopes of
.
29
y mle
et
:
;
1
plutonium
and for 241,Anis
thatone
of the
1CRP Task Groups’
as adapted
by Martin and Blooz. 30
mode]
Tne oniy difference between Martin and Bloom's
and the ICRP is thet the former cotdines the nasopharyngea)
bronchial compartments into one.
pulmonary compartment
for the lung model are
tions:
and
The dose is calculated only fer the
so the difference is not significant,
27
oy
Parameters
.
those of the ICKP “* with the following excep-
The gut to blood transfer for plutonium isotopes is 1 x 1074
and for 74lan is 5 x 1074 32, also 24lan is assumed to be a class W
compound while plutonium isotopes are class y 33
Ingestion.
For the ingestion pathway the gut
are as stated previously:
1 x 1074 for Pu and 5 x 1074 for Am.
~
a ii
transfer coefficients
32
-
The
SEGcy
ava