U.S. Code of Federal Regulations

Regulations most recently checked for updates: Sep 22, 2020

§ 173.425 - Table of activity limits - excepted quantities and articles.

The limits applicable to instruments, articles, and limited quantities subject to exceptions under §§ 173.421 and 173.424 are set forth in table 4 as follows:

Table 4 - Activity Limits for Limited Quantities, Instruments, and Articles

Nature of contents Instruments and articles Limited quantity package limits 1
Limits for each instrument or article 1 Package limits 1
Solids:
Special form10−2 A1A110−3 A1
Normal form10−2 A2A210−3 A2
Liquids:
Tritiated water:
<0.0037 TBq/L (0.1 Ci/L)37 TBq (1,000 Ci)
0.0037 TBq to 0.037 TBq/L (0.1 Ci to 1.0 Ci/L)3.7 TBq (100 Ci)
>0.037 TBq/L (1.0 Ci/L)0.037 TBq (1.0 Ci)
Other Liquids10−3 A210−1 A210−4 A2
Gases:
Tritium 22 × 10−2 A22 × 10−1 A22 × 10−2 A2
Special form10−3 A110−2 A110−3 A1
Normal form10−3 A210−2 A210−3 A2

1 For mixtures of radionuclides see § 173.433(d).

2 These values also apply to tritium in activated luminous paint and tritium adsorbed on solid carriers.

[Amdt. 173-244, 60 FR 50307, Sept. 28, 1995, as amended by Amdt. 173-244, 61 FR 20751, May 8, 1996; 63 FR 52849, Oct. 1, 1998; 65 FR 58630, Sept. 29, 2000; 66 FR 45383, Aug. 28, 2001; 69 FR 3676, Jan. 26, 2004]