CESIUM-137 METHODOLOGY
For
13766
Radiological
and
6064,
the
Protection” —
and
Protection and Measurements”
INDOS
code-?
are
used
published; however,
year.
methods
for
as
the
of
the
the
National
developed
dose
International
Council
by Killough and
calculations.
This
Commission
on
Radiation
Rohwer
code
on
in
is
their
used
the output is modified to show the body burdens
as
for each
For 13766, which is of major importance in the Marshall Islands,
the
model consists of two exponential components with half-lives of 2 and 110 d,
with
10% of
the
compartment.
intake
These
going
data
are
to
the
2-d
consistent
compartment
with
preliminary
Brookhaven National Laboratory on the half-life of
in the Marshallese.~"
a mean of 114 d
females
the
The average results
(range:
mean
value
76 to 178 d)
is
83d
and
the
90%
to
data
the
obtained
from 10 Marshallese males
63
to
by
long-term compartment
for the long-term compartment.
(range:
110-d
126d).
The
gut
showed
For 21
transfer
coefficient for 1376. is 1.
TRANSURANIC RADIONUCLIDES METHODOLOGY
For the ingestion pathway,
isotopes
is
1x 10¢
and
for
the gut-to-blood transfer coefficient
2Al A
it
is
5x io
(see
Ref.
for Pu
22).
The
critical organs are bone and liver with 100-y biological half-lives for Pu and
Am in bone and 40 y in liver.
Of the Pu and Am transferred to the blood, 45%
is
and
assumed
to
reach
the
bone
45%
is
assumed
to
reach
the
liver.
The
remaining 10% is distributed among other organs.
DIETARY INTAKE
The doses reported here are calculated assuming a daily intake of 200 ¢g
of fish muscle tissue and 10 g of clam muscle tissue.
The 200 g/d intake of
fish is an upper limit from two different surveys conducted at various atolls
in the Marshall Islands. !?
would
be
less
than
200 g/d.
The average daily intake under normal conditions
The
dose
resulting
from
the
daily
intake
of
anything other than 200 g can be easily calculated from the ratio of the newly
assumed intake to the 200 g/d intake.
skin make up a portion of the diet,
If other organs such as fish liver or
the resulting doses can be computed from
the data in Ref. 7 and the appropriate values for daily intake.