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50
N-4
Part A of this Note deals with thyroid dosage relating to the Bravo
event in 1954. It comprises two tables.
Part B consists of a letter from Dr. W. H. Adams of Brookhafen
National Laboratory to Dr. Roger Ray of DOE. It deals with the question
of whether or not prolonged residence on Rongelap since 1957 hasfresulted
in an increase in thyroid neoplasia. It also considers changes jn
longevity and blood counts.
TABLE N.4A #1
Source
THYROID DOSE FROM INDIVIDUAL RADIONUCLIDES
IN FALLOUT TO THE ADULT MALE ®>
Half-life
Per cent physical
decay in 3 weeks
Dos
rads
Internal exposure
Iodine-135
6.6 bh
100%
190
Iodine-134
§3.2 min
100%
3
Iodine-133
21
2b
100%
550
Iodine-132
2.3 h
100%
7
Todine-131
8.04 d
84%
130
.
Tellurium-131
30 h + 8.04 da
79%
120
Tellurium-13im
25 min + 8.04 d
84%
13
External exposure
gad
190
Total dose
1203
*/
Lessard et al,
b/
Exposure to the fallout on Rongelap Island occurred for abouf 45
hours.
(1985)
The fallout fell for about 7 hours.