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AV.oPM I'°! PER 24 HOUR URINE SPECIMEN
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EXCRETION OF RADIOACTIVE FISSION FRAGMENTS BY MAN
19,000
x
30,900
40,000
x
x
x
Fisure 1. --Maypof 1, S. collection stations,
SHOT # 12
the passage of clouds and the exeroted iodine131 activity.
The data obtained from the Denver samples
(fig. 6) are particularly interesting from the
third through the seventh week. The diminish-
ing level of excreted activity follows closely (he
physical decay curve of iodine-131 over that
period,
There was no precipitation and no
additional cloud passage over {hat area during
the 5-week period.
Individuals varied greatly,
but the average of 10 specimens yields the
smooth decay curve.
Table [I shows the average values obtained
for 24-hour specimens at several locations for
the entire test period, February 22 to May 24,
7
89
matethe thyroid burden.
Tante H.--AVERAGE [ODINE-131 ACTIVITY IN
24-0UR URINE SPECIMENS COLLECTED
FEBRUARY 22 TO MAY 24, 1955
Ogden, Utah
134 dpm/24hr
Camp Mereury, Nev. 98 dpm/24 hr
Belleville, 111.
74 dpm/24 hr
Denver, Colo . ..
60 dpm/24 hr
Oklahoma City, Okla. §2 dpra/24 hr
Washington, D, C
20 dprma/24 hr
Chicopee Falls, Mass
12 dpm/24 hr
San Franeisce, Calif. . 11 dpm/24 hr
spec
sper
spee
spec
spee
spec
spec
spec
Some thyroid autopsy specimens were assayed during the test period, but most ef these
were so long removed from the biosphere that
no significant activity was observed.
The maximum amountof iodine found in any
individual 24-hour specimen was 774 disintegrations per minute. We found iodine-133
CURIES PER MILE 2
There appears to be
rather good correlation in this instance between
3
From this data one could roughly esti{SILVER HILLS, MARYLAND)
station, Salt Lake City.
1955.
FALLOUT
GATA
The data presented in the upper graph of
Figure 5 is from Ogden, Utah, while the lower
graph is from the nearest, gummed paper
acco
3000
2000)
(000
500
°
22
FEB
2
“
1
4s 8
APR.
1
Figure 2.—Fallou! data—Walter Reed Army Medical Center,
sr
THE SHORTER-TERM BIOLOGICAL HAZARDS OF A FALLOUT BYELD