Aerokoj-Eneman Complex:
Aerokoj, Aerokojlol
Bikdrin, Lele
Eneman
East
Eneman
West
Eneman
Enidrik
East Enidrik
West Enidrik
Lukoj
Jelete
Oroken
Bokaetoktok
Bokdrolul
Bokbata
Aomen-Iroij Complex:
Aomen
Lomilik
Odrik, Iroij
1-10
6-10
1-570
1-10
20-570
3-235
3-30
10-235
60-200
60-130
15-45
10-35
20-50
10-30
5-20
26-330
10-40
6°
Co,
©° Co,
137
Cs
1258 sh
*No soil sample or field spectra measurements.
It should be noted that these are the ranges of our measure-
ments.
It is quite 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
to half lives of 2.7 and 5.2 years for **°Sb and °°Co,
respectively, the exposure rate levels on islands where
137
Cs 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
137
Cs penetration into
decay and weathering.
Studies of
soils usually have indicated that in undisturbed soils with
high organic content very little penetration of +37 cas takes