be made.
Table 4 summarizes the fallout pattern characte
Stics fro
the Bikini tests.
The last column in most cases indicates that the
wind directions precluded fallout on the islands. The de nite exceptidns are Bravo and Yankee.
were in fact made.
For Bravo and Yankee, off-site
Wone cf the Enewetak shots resulted inf
Zikini or other islands to the east, so the test operations
carn be ignored.
measurenents
fallout on
in Table 1
.
’ Figure 2 shows the Marshall Islands relative to the
test loce-
_ tions. “The Bravo fallout pattern has been reconstructed ifdependently
by AFSWP, NRDL and RAND using some modelling, while the Yar ee pattern
is based on extensive surveys.
_ islands are given in Table 5.
The one-hour dose rates for
affected
All of the listed islands are outside
the lowest dose-rate (100R/HR) contour for Yankee (Rongelab
is just
_ barely); the levels are stated only tothe nearest decade
extrapolation had to be used.
The range of values for Ro
: Ronoerik is due te the variation of the Bravo pattern acr
. respective island.
By and large, Bravo is the predominant]
Table 6 provides 1977 estimates of the cs}3? dose
' these islands.
On the basis of the limited comparison pe
contributor.
pate for
ormed for
, the Enewetak case, these values could be reduced by a fac
r of about
: 6 to account for soil migration, provided the geology jis s
‘ilar to that
: for Enewetak.
The final part of this paper is devoted to identi
" high confidence which islands did not receive fallout fro
DOE ARCHIVES
ing with
the Bikini
tests. Table 4, as discussed above, indicates that only ravo and
_ Yankee definitely resulted in fallout on the islands; thi
"on the use of off-site measurements to reconstruct their
fs basec
Spective
The other shots in the Castle operatio » for which
problem.
there were no off-site measurements, apparently were not
However, a detailed investigation is warranted and is rep rted on in
the appendix. Also contained there is an extrapolation o the Bravo
fallout patterns.
_and Yankee patterns to a level consistent with background.
“3