[INPUT DATA
Surface meteorological observations were avalizole from some alolls anc from
the U.S.S. Curtiss whieh cruised south of Bikini; nowever, since the larger dacticlas
fall rapicly from the debris eloud to the surface and spend little time near the
surface, not many surface reports were used.
Of far greater importance are the
upper air wind observations taken at four sites near Bikini atoll.
Other signiticant
input data consisted of a flat topography, cell sizes of 34 km (east-west) by 17 km
(north-south), and 1 km in the vertical, stem and cap debris cloud geometries at
stabilization
time,
souree
rates
for
both
gross
fission
products
and
selected
individual nuclides, and particle size spectrum parameters.
CALCULATIONS
Gross Fission Products
The time-integrated external dose pattern (in rads) due to gross fission
products from detonation time to evacuation time of Rogelap atoll (51 hours) ure
shown in Fig. 1.
Tne numbers next to Allinginae, Rongerix, and Utirik atolls are
integrated values up to the time people were evacuatec from those atolls.
For
.
comparison,
the
value
Strauss“! are given in Table
1.
of
total
{5
Dunning”!
and
the agreement is very good
for
dose,
Note that
.
estimated
by
Rongelap and Ailinginae atolls. However, calculations for Rongerik and Utirik are
at odds ‘vith earlier estimates. The code calculaticns for Rongerik are higner, while
those for Utirtk are lower.
This variation appears to be in part a prapiem of
"tunings also a possible variation in wind directions and speeds at late times when
the only wind observations were from the U.S.S. Curtis, south of Bikini (some
distance from the atolls of concern) may be an explanation.