n
ps ia
Figure 25 demonstrates:the external exposure following the 1958 testing se~
Since return to Rongelap followed 3 years after the BRAVO contamination,
ries.
_oe
ny
de Ft
this series contributed in large part to the external exposure post return.
.
CS
weet
-
The Castle BRAVO shot of March 1954 caused the contamination of the
mt
have included increased use of imported foods and weathering of the source.
SG
HBSS
wee
+
a
radioactive decay of the source and a conglomerate of other factorawhich might
i-
2
Dietary decline of radioactivity included
-
declining continuous uptake fesine.
.
gsed in this analysis were representative of a
”
The dosimetric models
coe
1
7
+t
spectroscopy and by indirect radiochemical analysis of urine and blood.
ao
ea
my
throughout the residence interval post return primarily by direct ip vivo gamna
.
Se
Body burden data for dosimetrically significant nuclides Were obtained
IRL
tively.
y
ae
1954 and June 1957 the return of the Utirikese and Rongelapese, occurred resper-
~
eat
During June
wales
hours after detonation and from Utirik 55 hours after detonation.
wt
he
Evacuation from RongeLap commenced 50
wt
Teeth 4
wee
oe
inhabited atolls Rongelap and Utirik.
Seepi Ssh ety
.
.
Le
SUMMARY
ee
“G
SS
etary loss rate constants were estimated from sequential body burden data ani
a
were comparable for both atolls.
‘e
Variation in body burden history data for a particular nuclide on @ partic-
ular atoll was observed in whole body counting data and urine bioassay results.
o
ery
m
This was attributed principally to the statistical variation encountered when
es
small groups are sampled from a heterogeneous group of body burdens in peopl+,
“s
and in the case of urine bioassay additional variation was introduced during the
Sy
laboratory analysis of samples.
Daily activity ingestion rates were determined for all measured
radionuclides.
In general, infants, children, and adults between 20 and 40
50
ON ai ae a ee GE teeare