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Table 5.1
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GROSS BETA ACTIVITY IN URINE OF RONGELAP GROUL
we ye vere -
im" wan3 meee1p hatewe va,
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(Urine Collected on 46th Post-exposure Day and Values Corrected for Decay
Back to Colleetion Diy)
$
‘
Total
*
.
Age > 5 years
Pa
‘
2
Beta Activity
d/m /24 hr
12000
3
150
5
155
23
40
33
54
69
Mein
Case No.
Ago + 16 yoars
712
894
,
4
7
Volume
24 hr
Beta Activity
dem ‘ld he
455
634
810
1700
201
313
9
355
223
10
980
549
260
80
455
0
28h
301
1l
13
14
450
340
780
1583
1677
2460
165
404
18
22
455
47
1670
77
-
a
th
Total
Volume
-24 br
Case No,
t
30
960
438
34
750
570
37
480
792
40
550
1450
46
49
330
425
495
0
52
780
0
55
320
1080
Age 6 to 15
57
56
700
3220
years
58
750
2170
1900
0
60
62
810
980
580
1985
1032
0
63
66
635
-855
-68
71
73
300
290
230
2010
1450
0
20
24
-
- 265
§50
—
550
1095
26
35
650
255
36
39
47
190
280
650
236
1100
1705
67
72
75
76
450
110
440
980
674
507
0
1180
78
79
80
82
965
465
540
670
52
2038
1353
2140
Meun
439
758
Mean
581
1208
‘
**
Se.
2260
1715
group —25 per cent (of which 11 per cent is La'*, in equilibrium with Ba!*° at this time). Fis-
sionabie material was not found in significant amounts in any of the urine samples analyzed.
lodine-~131 was found only in samples analyzed at early time intervals, due to its relatively
short physical half life.
5.4.2
Estimate of BodyBurden
For estimating the human body burden of the various fission products, a semi-empirical
approach, involving extrapolation from animal data, was used. Two Rongelap pigs werekilled
after their average 24 hour urinary excretion of fission products was determined. All tissues
were analyzed for total beta activity, as well as for Sr®*, Ba’, and the rare earth content
(Table 5.2). By applying the ratio of animal body burden/urine excretion activities to the
Rongelap native urine samples analyzed at about the same post-detonation time, a total human
body burden of 0.33 uc, for post-exposure day 82 was obtained. If this total human body burden
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