43
Table 4.
Radionuclides
Concentrations of tranuranium radionuclides in
Halimeda Algae and Cactus Crater.
Halimeda monile*
24lam (pCi/g dry wt)
2.53 + 0.30
239424 0py (pCi/eg dry wt)
44
18.68 4
0.033
Crater sediment
Table 5,
Crater Water
9.2 + 2.0
82 + 2
238py, 239+240p,
0.54 + 0.03
0.54 + 0,02
24lam, 2394240p,
0.14 + 0.02
0.11 40.02
Plutonium concentrations in the water column at Enewetak Atoll.
116 + 62 fCci/li
0.53% 0.02
December 1972
July 1974
April 1976
39
35
6
4l
16
12,
28
0.12
0.13
0.13
__
0.29
0.57
ee
1.70
1.54
0.27
1.81
0
0.53
1.24
Solubte
OG?
Q,29
Particulate
0.68
0.)
0,73
O. 71
0.50
Mean concentrations in
lagoon water (fFCi/1)
Soluble (< 1 um)
Particulate (> ] um)
Total
Mean ?38pqy, 2890 240py
Water
24lam (Halimeda:
sediment)+ 0.28
239+2450py (Halimeda:
sediment) 0.23
Concentration factor for 239+240py
x
Wet wt:
dry wt
=
=
Sampling time
column
inventory
(mCi/km*)
7.5 x .10" @Ci/kg wet wt per pCi/ke H20.)
Soluble
Particulate
Total
1,84 -
1.65
1,94
0.76
1.33
2.13.
Taverage concentration in 8 water samples from Lhe crater bottom collected between
1974 and 1977,
* oCi/e dry wt Halimeda + pCi/g dry wt sediment.
Lageon Inventory (Ci)
Soluble
Particulate
Total
Water Inventory ~- % of
Sediment Inventory
Water Inventory compared
to top 2,5 cm of sediment
surface (%)
inventory
Total
Water Inventory Compared to
top 16 cm of sediment (%)
inventory
Soluble
Particulate
;
Total
0.14
0.13
0.056
0.023
O.15
0.045
O.10