173.433—Requirements for determining basic radionuclide values, and for the listing of radionuclides on shipping papers and labels.

Where:
B(i) is the activity of radionuclide i in special form; and
A1 (i) is the A1 value for radionuclide i.
Where:
C(j) is the activity of radionuclide j in normal form; and
A2(j) is the A2 value for radionuclide j.
Where:
The symbols are defined as in paragraphs (d)(2) and (d)(3) of this section.
Where:
f(i) is the fraction of activity for radionuclide i in the mixture; and
A1(i) is the appropriate A1 value for radionuclide i.
Where:
f(i) is the fraction of activity for normal form radionuclide i in the mixture; and
A2(i) is the appropriate A2 value for radionuclide i.
Where:
f(i) is the fraction of activity concentration of nuclide i in the mixture; and [A](i) is the activity concentration for exempt material containing nuclide i.
Where:
f(i) is the fraction of activity of nuclide i in the mixture; and
A(i) is the activity limit for exempt consignments for nuclide i.
Where:
n m represents all the radionuclides in the mixture;
m are the radionuclides that do not need to be considered;
a(i) is the activity of radionuclide i in the mixture; and
A(i) is the A1 or A2 value, as appropriate for radionuclide i.
Table 7—General Values for A1 and A2
Radioactive contents A1 A2
(TBq) (Ci) (TBq) (Ci)
1. Only beta or gamma emitting nuclides are known to be present 1 × 10−1 2.7 × 100 2 × 10−2 5.4 × 10−1
2. Only alpha emitting nuclides are known to be present 2 × 10−1 5.4 × 100 9 × 10−5 2.4 × 10−3
3. No relevant data are available 1 × 10−3 2.7 × 10−2 9 × 10−5 2.4 × 10−3
Table 8—General Exemption Values
Radioactive contents Activity concentration for exempt material Activity limits for exempt consignments
(Bq/g) (Ci/g) (Bq) Ci)
1. Only beta or gamma emitting nuclides are known to be present 1 × 101 2.7 × 10−10 1 × 104 2.7 × 10−7
2. Only alpha emitting nuclides are known to be present 1 × 10−1 2.7 × 10−12 1 × 103 2.7 × 10−8
3. No relevant data are available 1 × 10−1 2.7 × 10−12 1 × 103 2.7 × 10−8
[69 FR 3677, Jan. 26, 2004; 69 FR 55119, Sept. 13, 2004]