Northern Marshall Islands
Aerial Radiation Survey
Preliminary Data Summary
Bikini Atoll
Average Terrestrial Exposure
Rate * (uy R/h at 1 meter)
Island
Number
Frame
Number.
Marshallese
Total
Name
B-1
177
B-2
38
Yurochi —
B-3
38
Vorikku
B-4
38
Romurikku
B-5
38
Aomoen
B-6
15
Bikini
B-7
7
Bokonfuaku
B-8
B-9
7
7
Yomyaran
Namu
B-10
7
Rochikarai
B-11
7
B-12
200
B-13
B-14
Component
32
11.6
35
.
21
9.4
4.7
7.4
31
1.9
0.9
0.4
0.6
1.6
0.9
0.5
55
3.9
Tonchebi
1.0
0.4
0.4
Enyu
2.7
2.3
<0.3
12
12
Airukirau
Bigiren
0.5
0.5
<0.3
<0.3
<0.3
<0.3
B-15
12
Reere
B-17
34
Endrik
0:3
2.0
12
Eninman
|
§°Co
Component
12
B-16
Eniairo
137Cs
Gross Count
|
4-6
-
7.9
4.2,
2.2
45
35
7.9
B-18
212
Rukoji
42
29
8.9
B-19
212,
Chieerete
B-20
215
Arriikan
12.6
9.7
2.8
B-21
215
Ourukaen
9.9
6.3
3.1
B-22
215
Bokoaetokutoku
5.4
2.7
2.9
B-23
215
Bokororyuru
11.4
8.5
3.3
* Extrapolated from aerial data obtained at an altitude of 38 meters (125 feet).
An additional 3.3 up R/h due to cosmic ray contributions must be added to obtain
the total external exposure rate.