-.
OFFICIAL USE ORLY
bu:
We
Number of
Age Groux
Individuals
<5
5 - 16
|
-
> 16
Urine(ml)
Volume
1155
Li
.
UCRL-12275
% of Total
“Volume of
7
\
42.8
4829,
31
20.1
1603.
75-0
The urine semples are typical of adults and the calculated thyroid burdens are
presumably also those of adults.
hdd .
Associated with this pit are the shorter lived isotopes I
136 rt?
and
If the fodine entered by way of inhalation, the time of intake was H+6
On the other hand, if water (and food) were the principal source,
to H + 18.
the time of ingestion would be extended from H + 6 to H + 51.
Three items contribute to the differences in dose from the various
jodine isotopes.
These are!
(1) radioactive decay before inhalation or oral
ingestion, (2) differences in the fission ylelds of the chains, ‘© and (3) the
“average energy deposited in the thyroid per disintegration.
presented in Table I for yr and yt,
‘distribution in the cloud was assumed.
that, on the average,
These factors are
In the case of inhalation, uniform
For oral ingestion it was assumed:
1/3 of the intake occurred at H + 10 and 2/3 at H + 30.
\
Table I
Ratio of Doses for the Two Modes of Intake
Tnhalation
I 1.33
|
/131
I 135
Oral Ingestion
Z 23
/1DL
I 135
/5333
/13).
Decay
0.68
0.41
0.487
0.148
Fission yiera’®)
1.38
1.25
1.38
1.2%
Energy
2.00
1.50
2.00
1.50
1.85
0.57
Net Factor
9009334
|
“OFFICIAL EESE OMEY
|
1.35
|
0.27