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.
Appendix 16-A Index
| 
