they were based upon measured air concentrations.
you a total pCi/m3.
That measurement gives
Then you multiply by the length of the sampling in
hours; multiply ‘by a breathing rate which is age specific, of course.
we want to calculate for a particular radionuclide.
Hicks' source term calculations.
Then
We go back to Harry
For any radionuclide, we can look at the
ratio of that radionuclide to the total activity; then that multiplied by
this, of course,
then gives us the activity of a particular radionuclide;
and then, again, our dose factor.
Again it depends on human metabolism and
is an age specific number.
LO
Well, the-key thing here is then this measured air concentrations, and
11
the next viewgraph (LRA-22) we've gone through before.
Our preference
is
12
to use data collected by this device, which is a Casella cascade impactor.
13
It has four stages followed by an after-filter so that we typically were
14
able to recover data as shown ‘tn the next viewgraph (LRA-23) where we have
15
the raw log sheets from Los Alamos now where we have the count data for
16
each one of these five stages.
17
data to make our calculations.
We have actually gone back to this original
|
18
Now the problem with this data, or one problem with this data, is that
19
what is shown here in terms of the diameters is not an aerodynamic diameter
20
that we want to enter the
21
through and recalculated these diameters.
22
. 23
ICRP lung dynamics- model with;
If I could have the next viewgraph (LRA-24).
This is again some of
the raw data that we find in the files from Los Alamos.
trace
24
original
25
calculated out to have a median diameter of 42 microns.
in
of
their
the
activity
calculation.
and
26
errors
27
dramatic change on some of these numbers.
28
But, nevertheless,
as I
It
their
makes
attempt
slight
so we have gone
to fit.
This is their
This one was
‘We have found some
corrections.
It
has
a
We get our calculation of 18.
indicated, we have found more accurate calibration
39