wk Bike beet ateSea ND Wat heGSRAIR Blenae elPrtel Daa
NOTES
957
i
tri
SOG
-
x
200}-
\
[4
ToT
biota
100:
50
1
BICESIUM/POTASSIUM (pCi/g)
1900
196!
—_
1962
j
i963
1964
i
1965
i
l
1966
1967
YEARS
1968
A!
i969
\
i970)
\
!97!
Fic. 2. Comparative levels of ®7Cs in a population of United States, U.S.S.R. and Denmark,
(A) -~---UL.S.S.R. (see Ref. 8), (B) O—--—©O Les Alamos Laboratory (see Ref. 9). (C)
6
x Denmark (Aarkrog ef al.), (D) @——e Brookhaven National Laboratory.
MacDonazp," in Los Angeles, reported that though
the recent tests conducted by China and France did
not increase the levels of 8?Cs in man, the rate of fall
has decreased after 1968.'5) (Also see Fig. 1.}
The integral radiation dose from "Cs for the
is the only technique capable of supplying a direct and
accurate measure of 187Cs body burdens for these
populations studies.
K. K. SHuKLA
C. 8S. Domsrowskt
S. H. Coun
period from May 1962 to April 1971 was calculated to
be 7.75 mrem based on the calculations of LoEvINGER
According to Loevinger, the absorbed
radiation dose to a 70 kg man with height of 170 cm
from B’Cs, would be 0.117 mrem/yr/nCi87Cs and.
0.136 mrem/yr from *#*K/g K. Assuming an average
body potassium as 120 g, the integral dose from #°K
for the 9 yr period (from May 1962 to April 1971)
would be 146.7 mrem. Theradiation dose from 187Cs
is therefore only 5.3°% of the dose from °K for the
comparable time periods.
The maximum dose rate due to "Cs occurred in
1964. At this time RicHMonp'?) reported the radiation
dose resulting from 137Cs for man weighing 70 Kg
with a height of 170cm as 1.5 mrem/yr. In the
present study, this value was found to be 2.1 mrem
using the calculations of Lorvincer.'®) At the same
time, Sivintsev'®} reported a radiation dose for this
year of 6.5 mrem/yr for a 70 Kg male subject in
Moscow using the ICRP recommended formula:
Dose rate = 11.7 x
nCi 137Cs
body weight (mrem/yr).
While the results of the present study are based ona
small sample and cannot be extrapolated directly to
the population at large, the pattern of changein !9’Cs
levels compares very well with the mean of a population of 900 Brookhaven employees counted at various
times during the same period. Whole-body counting
Medical Research Center
Brookhaven National Laboratory
Upton, L.I., New Yerk 11973
References
1. S. H. Conn, E. A. Gusmano and R. A. Love,
Nature, Lond. 205, 537 (1965).
2. S. H. Coun, S. W. Lippincott, E, P. GRoNK1TE
3.
.
.
Cn of
et ai.)
6.
and P. F. ReizensTe1n, Whole-Body Counting,
IAEA, Vienna (1962).
§. H. Coun, C. S. Domprowsxi, H. R. Pare and
Jj. S. Ropertson, Phys. Med. Biol. 14, 645 (1969).
I. O. Anverson e? al., AE-119, Stockholm (1963).
N.S. Mac Donatp, I. Ban, A. FLesHER and M.
Hacxenporg, Nature, Lond. 228, 283 (1970).
R. Lorvincer, J. G. Hott and G. J. Hine,
Radiation Dosimetry, p. 801, Academic Press, New
York (1956).
7. C. R. RicumMonp and J. E. Furcuner, Radiat.
Res, 32, 538 (1967).
8. Yu. V. Stvintsev, V. A, KANAREIKIN and O. M.
ARUTINOV, Radiobiologiya 6, 822 (1966).
9. E. C. Anperson, R. L. Schucn, W. R. Fisoer
and W. Lancuam,Science 125, 1273 (1957).
10. A. Aarxroa, Health Phys, 20, 297 (1971).