CRFirene
Aranit which was found to be free of dense ground cover.
Exposure Rate Reading
Measured exposure rates on Rojoa and Biijiri were relatively low, 5-10
uR/hour and 1-4 uR/hour respectively.
On Aranit, the maximum exposure
rate observed was 150 uwR/hour near the western end of the island.
Expo-
sure rates throughout the island averaged between 60 and 100 uR/hour.
Scrap Metal
Very little scrap metal was evident on anyof the above islands.
On
Biijiri, a piece of scrap metal on the northeast end of the island had a
contact reading of 1 mR/hour while scrap metal evident on Aranit ranged
from 250 to 800 uwR/hour on contact.
Alpha Contamination
No surface alpha activity was detected on Rojoa, Biijiri, or Aranit.
Bogairikk (HELEN) and Bogon (IRENE)
General Description
Bogairikk island now consists of nothing more than a small, sparsely
vegetated "islet", which is almost an extension of the sandbar originating from the southwest corner of Bogon.
Bogon is much larger, with con-
siderable vegetation and several large bushes.
Movement in the interior
of Bogon was very difficult due to the extensive growth of CASSYTHA
FILIFORMIS, which not only covered the ground, but also formed a formidable
barrier
arri
on tree Sa nd on n bunkers
bunkers,
Exposure Rate Readings
Measured exposure rates on Bogairikk averaged 10 uR/hour.
exposure rates were considerably higher.
On Bogon,
On the southeast side of the
SEMINOLE crater on what appears to be darkened coral, exposure and ground
contact rates up to 300 uR/hour were measured,
was about 100 uR/hour.
The average exposure rate
Along the northern half of Bogon, exposure rates