Table 2, Table 3, Table 4

Table 2

Relationship Between A1 and E max for Beta Emitters

E max (MeV) A1(Ci)
< 0.5 1000
0.5 – < 1.0 300
1.0 – < 1.5 100
1.5 – < 2.0 30
2.0 10

Table 3

Relationship Between A3 and the Atomic Number of the Radionuclide

A3
Atomic Number Half-life less than 1000 days Half-life 1000 days to 104 years Half-life greater than 104 years
1 to 81 3 Ci 0.05 Ci 3 Ci
82 and above 0.002 Ci 0.002 Ci 3 Ci

Table 4

Activity-Mass Relationships for Uranium/Thorium

Thorium and Uranium Enrichment* wt % U-235 present Specific Activity
  Ci/g g/Ci
0.45 5.0 X 10-7 2.0 X 10 6
0.72(natural) 7.06 X 10-7 1.42 X 10 6
1.0 7.6 X 10-7 1.3 X 10 6
1.5 1.0 X 10-6 1.0 X 10 6
5.0 2.7 X 10-6 3.7 X 10 5
10.0 4.8 X 10-6 2.1 X 10 5
20.0 1.0 X 10-5 1.0 X 10 5
35.0 2.0 X 10-5 5.0 X 10 4
50.0 2.5 X 10-5 4.0 X 10 4
90.0 5.8 X 10-6 1.7 X 10 4
93.0 7.0 X 10-6 1.4 X 10 4
95.0 9.1 X 10-6 1.1 X 10 4
Natural Thorium 2.2 X 10-7 4.6 X 10 6

*The figures for uranium include representative values for the activity of the uranium-234 which is concentrated during the enrichment process. The activity for thorium includes the equilibrium concentration of thorium-228.