&)
The problem was to plan a survey that would cover enough area and atolls to
define the region where higher levels of fallout may have occurred, but not
so extensive and costly that funding could not be obtained.
This led to the
concept of conducting what may be described as a screening Survey, e.g., a
survey where results could be used to determine whether or not any further
survey effort was needed.
For such a survey there is also the possibility that
if any unexpected results are obtained, some modification of the survey plan
can be made during the survey.
AEC staff reviewed the technical files containing information on all nuclear
tests conducted at Bikini and Enewetak Atolls, the available radiological
monitoring data, and the meterological information for each test.
For the
tests with the higher fission yields, and using fallout trajectories developed
from the winds for the day of the test, atolls that most likely received close-in
fallout were identified by inspection.
Lacking radiological measurements in
the downwind area that could confirm or deny the presence of fallout for a
number of tests and atolls, this was considered the best approach for a
screening survey plan.
The list of locations that was developed contained 13 {islands and atolls
(including Bikini and excluding Enewetak).
In this were two single islands
and eleven atolls with each atoll] contained a number of islands.
In order to
characterize radiological conditions in the atolls, the larger islands and
500u224
z