EFFECTS OF IONIZING
JO plegtlieltfcs
AIRS.ehoeSAhele RADEUAL 4 eekbNOreadcds NBs welll,ae wh? 4 tore tt
70
RADIATION
Table 5.2—Summary of Human Urine Analysis, Gross Beta Activity
Dine pose
1}s Moxtus
No.
7
1]
3]
A (<3)
B_(3—16):
C (>16)
American
{24HKS)
Mt
Dis
24HRs
|
No.
VOLUME
(24 RS)
ML
Dis
24 HARE
165 404
434
581
|
No.
§°
758
1208
Ailinginse
Age in years
VOLUME
10
824
705
10
370
330
Voirnt
(74 RS)
ott
360
Din
24 URS
12 |
12
510
625
0
3
12
400
655
0
0
33
5
!
1
1800217
2
10
275
722
126
553
25
1158
3d
te
C (>16)
.
No,
4 Moxtis
ae
B (5-16)
DIM
DRS
!
s
A (<5)
(24 nes)
ML
3 Montits
wate
Rongelap
Age in veurs
VOLUME
2he Moxtits
All values corrected for decay.
ternal dose.
Thix may be accounted for by the
fact that the Aadlimeuime group drank contain-
inated water from open coutuiners and ate contunimated food up to the time of evacuation,
whereas the Amerteans tiecested much less contaminated fool and water, since both were
woe individuals, the day-to-day levels of ac-
tivity. for each individual were fairly con-
sistent,
Further information on the source of in-
dividual variations was obtained by grouping
the individuals from the Rongelap and Ailhiginae croups secording to age (Tables.é.3 and
5.4).
While the activity excreted per unit vol-
ume of tring is about the sume for both children
and adults, the mean activity of the urine ex-
creted in 24 hours by chifdrén under 15 years
nation of the Ainericans concerning radiation
wis siemificunthy lower than that excreted by
adults, The data available do not indicate
defnitely whether the Jower total excretion
indicates a stualler total body burden in the
children resulting from lower duihalation and
The variation of oross activity among the
cree of fixation of the radio-elements by grow-
largely stored in closed containers.
Indoetri-
hazards probably was also a factor in reducing
the aimount of contamination which they re:
ceived,
Ingestion, or whether it represents a higher de-
ing bone,
se
vee
ete gh
Individuals drany of the three groups is quite
ee eeee
lower amount of internal contamination, even
thong both groups received about the same ex-
large (Tables 5.5 and 3.4). This is chiefly the
result of variations in the quantity of waler
and both the kind and quantity of food igested. The degree of exposure of the tndividual to airborne activity is also a factor in
determining the individual deeree of contamination. While there were durge variadions:
seams
highest activity’ was in the Rongelap group
(Table 5.2). The Ailinginne group had less
than half that of the Rongelap group, and the
Americans had about one-quarter the activity
of the Ronyelap group.
The mean gross beta activity of the urine of
the. three groups above was roughly proportional to the external dose each group received.
However. a comparison of the mean beta activity of the urine of Adlinginae and American
groups indicated that the latter had a somewhat
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