DOG (IROIJ), EASY (ODRIK), FOX (LOMILIK), AND GEORGE (AOMEN)
The northern complex of islands is shown in Figures 16 and 17.
Iroij
and Odrik are connected by a long man-made causeway, while QOdrik is
in turn connected to Lomilik by a shorter causeway.
Lomilik and
Aomen are differentiated only by a narrowing of the land mass.
Only Lomilik contained any significant amount of radioactive debris and
displayed relatively high levels of external background.
The maximum expo-
sure rate due to soil contamination measured on each of these islands was:
Troij
-
40 yR/hr
Odrik - 10 yR/hr
Lomilik - 500 ,,R/hr
Aomen
- 100 yR/hr
The debris from Iroij, Odrik, and Aomen was buried on land.
A large
amount of non-radioactive scrap was removed from the ocean reef on
Aomen and also buried on land.
All radioactive metallic debris on Lomilik (maximum 500 uR/hr) was
removed and buried at sea.
Fragments of concrete from scientific
installations, all of which measured less than 100 pR/hr, were
buried on land.
One low lying, algae encrusted area on Lomilik showed background radiation
levels of 500 uR/hr.
A soil sample taken at this location contained
approximately 55% !°2MRh and 45% 60Co as measured by ganma ray spectroscopy.
The projected exposure rate reduction for this location is given by
Figure 18.
Since the absence of 137Cs would indicate that this sample
is atypical, a plot is also shown assuming that 20% of the total
activity is due to 137Cs and that the !°2MRh and 60Co retain their
same relative concentrations.
This might be more applicable to other
locations on Lomilik.
Two concrete bunkers on Aomen had areas on the tops and sides which
read 5-7,000 pR/hr (pty) at contact,
than 200 yR/hr.
The gamma exposure rate was Tess
Since the potential for exposure to individuals from
these sources was negligible, it was decided to leave the bunkers as
typhoon shelters.
28
Bee ed