"Let MT = the number of megatons of fission energy released,
W
sr
= the number of grams of available natural strontium
per square mile of area,
= the number of grams of natural strontium fixed in
the human skeleton at maturity,
= the number of gram3 of strontium-90 fixed in the
skeleton which is considered to be the level of
interest (MPC ox any other standard),
‘s the number of grams of strontium-90 produced by the
release of 1 Mf of fission energy,
= the area of the earth in square miles,
then
Mr
Since there is little chance that m will be changed appreciably
by future measurements and A is fixed, this relation can be simplified
as follows (taking m = 1000 gm and A = 2 x 108 mi“):
7
MI= 2x10 exw.
Taking T to be 5 x 1077 em (1 microcurie, the international
Mec), B= 0.7 gm, and W= 1.7 x 107 gm, it is found that MI is
2.5 x 104, assuming uniform world-wide distribution.
It is instructive to apply the SUNSHINE model to the data
collected thus far.
The following table summarizes the situation.
TABLE 8
Theoretical Lower
Actual Val-
Limit of the Thresh- ues Measured
old for Injury
Amount Fission
Yield Detonatea
Amount sr90
Deposited
Amount sr90
in Bone
To Date
4
ho Mr
719 * 10 ME
2002 gm/acre
-0084
(0.129 gm/mi®
(1)
5.38 x 10
1000 §.U.
0.5(3)
112
Theoreticulation
Ratio
Actual/
Theoretical
1.0.
-6(2)
-026
31