Table |.
Per Cent Abundance
and Relative Maximum Permissible
Concentration of Fallout Radioisotopes of Biological Interest
Per cent abundanceat: 1)
Relative
Fission
One
One
One
Ten
products
week
month
year
years
5,88
2.1
6.7
2.7
===
50 days
5190
eee
wee
1.8
21.8
28 years
1
y99
w--
wee
1.8
21.8
64 hours
200
y%l
2.4
7.6
3.9
---
58 days
300
zr95
2.5
8.2
7.300
-<-
65 days
600
Nb?5
---
4.1
18.0.
---
35 days
i, 000
Rul06
---
ee
2.4
---
365 days
100
Rn106
---
=e
2.4
---
2 hours
*
jist
6.3
---
---
8 days
20
(or
1.5
18.2
27 years
200
BalSim
1.5
18.2
3 mins.
*
..-
3.7
---
MPC
Half lite?)
values?)
100
1) Hunter and Ballou (1951)
2) Strominger, Hollander and Seaborg (1958)
3) MPC values relative to Sr90; based upon values from
69 for which MPC for Sr®9 ig 1078 ye/ce
*
A short-lived daughter for which hazard is negligible in
comparison to hazard for parent
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