Table 3.
Levels and decay rates of beta radioactivity of Rongelap- Ailinginae plankton, 1954-1957
Plankton net
Number Meshes Mate- eter
Date of
desigper
rial
of net collect__ nation
inch
inches ing
P late
No.
Atoll
Island
8201
8202
8303
8239
8240
19005
Rongelap
"
"
"
"
"
Labaredj
"
"
Kabelle
"
"
19006
"
"W
19019
19020
19024
"
"
"
Labaredj
"
Rongelap
19026
19027
19028
"
"
"
19030
19031
19067
19068
"
"
"
"
19070
19071
"
Ailinginae
19025
19029
19069
"
t
"
Diam -
12
"
"
6
20
6 or
20
tt
125
"
"
74
173
--
--
?
?
?
Silk
"
?
?
?
20
20
"
20
"1
tt
Dateof
first
counting
3-26-54
"
"
7-16-54
"
12-8-54
rt
First count
in uc/kg*
Ash
Wet
basis basis
5-11-54
83
"
2330
"
4000
8-11-54
68
"
46
.
1-3-55
tt
168
168
Decay slope
from date of
first counting
to October
30, 1957
-140
2.1
2.7
-
6.2
- 1.75
10.4
-
1.08
1.32
1.27
1.32
1.33
1, 35 **
6
20
6
74
173
74
"
"
"
"
"
"
12-18-54
"
1-26-55
"
"
2-22-55
104
32
25
5.0
3.9
54
- 1.72
- 1,73
- 1,68
Labaredj
"
Kabelle
6
20
6
74
173
74
"
"
"
"
"
"
1-28-55
"
1-29-55
"
"
"
27
12
58
.93
41
1.8
- 1.56
- 1.55
- 1.61
-
1. 61
Lukuen
"
Kabelle
"
6
20
1
2
74
173
74
157
1.5
4.4
20
. 18
-
1.70
1.70
1.76
1.72
2
157
1
74
"1
't
Rongelap
"
MojiriEnibuk
20
20
1
173
173
74
tt
ft
"
"
Nylon
"
it
Ht
"
"
"
"
"
"
"
"
"
"
"I
"
"
"
1-30-55
"
"
"
.10-21-55 11-26-55
"
"
10-22-55
"
10-23-55
"
"
"
24
93
37
95
6.4
6.9
2.1
2.0
4.5
95
5. 8
.044
. 047
. 70
_
-
lL. 72
.73***
- 1.38
- 1.58
1
rr
&
'