Aerokoj}-Eneman Complex:
1l Atoll
L exposure
» island
asured
) ur/hr.
2s due to
0 to
or
mund to
"om
go
Co
: Sites
utions
.Opes
a?
Ce,
marized
Aerokoj, Aerokojlol
Bikdrin, Lele
1-10
6-10
Eneman
1-570
East Eneman
West Eneman
Enidrik
East Enidrik
West Enidrik
Lukoj
Jelete
Oroken
Bokaetoktok
Bokdrolul
Bokbata
Aomen-TIroij Complex:
Aomen
Lomilik
Odrik, Iroij
*
*
f° co, +25 sp,
1°2Mpy,
1-10
20-570
3-235
®°co, **5sb,
1°2Mp,
3-30
10-235
60-200
®°co, **8sb,
60-130
15-45
10-35
*
*
*
1¢2Mp,
20-50
10-30
®°co, **7’ es
5-20
*
20-330
10-40
*°co, **®sb
|
*
ES
*No soil sample or field spectra measurements.
ajyor
ibutors
It should be noted that these are the ranges of our measure-
ments.
It is guite likely that there are locations where
the local exposure rates are higher than the upper limits
given in the table.
Since *°’cs has a half life of 30.5 years as compared
137
Cs
to half lives of 2.7 and 5.2 years for ***°Sb and *°Co,
respectively, the exposure rate levels on islands where
*37Cs was the major contributor, most importantly Bikini,
can be expected to persist at almost the current levels
for some time to come with only slight reductions due to
decay and weathering.
Studies of *°’cs penetration into
soils usually have indicated that in undisturbed soils with
high organic content very little penetration of *°”Cs takes
UG,
F\
RCH
DoF A