FS
100 0 200400
ranea!
Pacific ocean
Meters
Lagoon
A map of Bikini Island showing specific areas of interest for the
dose calculations.
Existing houses are situated within area l.
Areas 2 and 3 are proposed village sites for future housing units.
The interior portion of
the island is denoted by area 4.
the radioactivity from those
islands.
Since the islanders spend a
Gamma exposure rate data
reported by Bennett and Beck, > Held,
Lynch et al.
Moore,”
>
Gustafson,
and Robison ct al.
used for this purpose.
results,
Smith
LO
6
considerable fraction of their time
in the immediate vicinity of their
homes,
and
it may be
certain remedial
Were
Their
feasible to
actions
the exposure rates in
take
to reduce
this area.
For instance, placing 5 cm of clean
in conjunction with a
simplified area weighting scheme,
coral gravel around the houses out
yielded the values presented in
to a distance of 10 m, a common
Table 3.
practice in the Marshall Islands,
Note that these are rough
estimates since the data are scarce
will reduce the exposure rates by a
and were collected over a span of
factor of two.
almost 10 years.
with clean soil the top 20 cm of soil
over
The exposure rate
Removing and replacing
out to a distance of 10 m from the
the lagoon was estimated to be
3.3 uUR/h due to the cosmic ray
houses will reduce the exposure
contribution and an additional 0.2
rates by a factor of ecight.
UR/h due to naturally occurring
addition, the shielding provided by
radionuclides
the houses
sea water.
*
Pon
a
£
Ser
Coat
-18oe
ad
the
CF
in
themselves will
In
reduce
the