-3-
One of the
adjust
observed
major
After modification,
all observed
(over most other fallout
methods?
stations
for each time.
to calculate
source.
allowing
more
Furthermore,
particles;
this
modifications
calculations
required
upper
air
were
Finally,
than
falling
to incorporate
the
time-integrated
total dose from detonation
to handle
is
used
the
method
a tropical
particle
activity
deposition
set
of an
typical
instantaneous
atmosphere
increase
consisted
ARAC
increase
to the larger
by McDonald.
into
of
assessments.
undergo a large
wake correction
forth
in any of
ADPIC[3] particle-in-cell
the Bravo test,
from the stratosphere
the
as the cube
[4]
fall
Other
velocity
of particle
was added; this allows calculation
time to evacuation.
,..
in
of this code
for four times.
deposition
to add a turbulent
follows
and to make
and
of ADPIC,
input
it was necessary
correction
diffusion,
using winds for
to accumulate
for each 3-D cell intersection
transport,
since particles
in air density,
radius.
the
Modifications
periods,
The obvious advantages
The MATHEW winds are used then by the modified
code
rn’~ss
upper air wind data from 10 m to
codes) is that mass is not permitted
the ceils and winds are available
is to
so as to conserve
This W3S done for four time
es input.
observing
.[~]
is L1.ATHEW ; its purpose
was modified
analysis
35 km were entered
to three
that
winds, using variational
from cell to cell.
Oile
codes
of the