ENE LPN
In fact, this study shows a definite relation between a radionuclide
retention that increases (a fractionation thet decreases) with increasing
fraction of the time that the progenator, or precursor, elements are
refractory, i.e., fraction of the time they are not halogens, rare
gases, alkali metals, or tellurium.
sizes
These results involving all particle
are shown qualitatively to apply for several test conditions
including coral surface bursts and shallow-water surface bursts.
However, we emphasize that for Fniwetok the local fallout is of
interest rather than these overall conditions for both local and remote
fallout.
BEST AVAILABLE COPY
The percentage of the total radioactivity of the explosion
.
residues from all radionuclides that is present in the early fall-
out is called the Yearly Lailouc fiacciow” aad produces raetdnal
radioactivity on islands and lagoon of the Atoll.
For water surface
explosions, the value is in the neighborhood of 30 percent.
However,
for land surface explosions the "early fraction fallout" is higher,
with estimates ranging from 50 to 70 percent.
Variations in environ-
mental and meteorological conditions would result in variations in
these fractions of local fallout (Glasstone, 1964, p. 437).
We now consider the composition of fallout particles from surface
explosions on the coral of the Atoll.
Fresh coral debris is largely
CaO and Ca(OH)9 (Crocker, et al., 1965)
The calcium oxide particles
from the surface have different radiological and structural properties
depending on whether or not they were melted in the fireball from the
nuclear explosion (Lowman, 1960, p. 107).
Ge)