Northern Marshall Islands
Aerial Radiation Survey
Preliminary Data Summary
Rongelap Atoll
Average Terrestrial] Exposure
Rate * (uy R/h at 1 meter)
Island
Frame
Marshallese
Number
Number
F-1
167
Naen
F-2
167
Piganiyaroyaro
F-3
167
Yugui
F-4
159
Aerik
F-5
159
Yugui
F-6
189
F-7
189
Loniuflal
F-8
189
Gejan
F-9
153
F-10
Total
§°Co
Component
Component
38
36
2.6
27
25
2.0
-
-
-
33
32
2.3
22
20
1.5
Auknen
16
15
1.1
153
Eriirippu
-
-
-
F-11
139
Anielap
-
-
-
F-12
139
F-13
139
Kabelle
11
10.3
0.9
F-14
139
F-15
136
Mejatto
6.3
6.2
0.3
F-16
136
-
-
-
F-17
136
Yuzugan
-
-
-
F-18
179
Ribiyurigan
5.7
5.1
0.5
F-19
179
Laberedj
9.8
9.9
0.8
F-20
179-
F-21
179
Boken
79
7.2
0.6
F-22
179
Gabelle
F-23
177
Mellu
4.5
3.9
0.4
F-24
175
Aniejat
7.6
6.5
0.5
F-25
175
Gogan
5.8
4.9
0.5
F-26
175
-
-
-
F-27
175
8.5
7.8
0.6
175
Name
137Cs5
Gross Count
F-28
‘_
Kieshiechi
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* Extrapolated from aerial data obtained at an altitude of 38 meters (125 feet).
An additional 3.3 » R/h due to cosmic ray contribution must be added to obtain the
total external exposure rate.