10 CFR 20.1005 - Units of radioactivity.

§ 20.1005 Units of radioactivity.
For the purposes of this part, activity is expressed in the special unit of curies (Ci) or in the SI unit of becquerels (Bq), or their multiples, or disintegrations (transformations) per unit of time.
(a) One becquerel = 1 disintegration per second (s−1).
(b) One curie = 3.7×10 10 disintegrations per second = 3.7×10 10 becquerels = 2.22×10 12 disintegrations per minute.
[56 FR 23391, May 21, 1991; 56 FR 61352, Dec. 3, 1991]

Title 10 published on 2015-01-01.

No entries appear in the Federal Register after this date, for 10 CFR Part 20.

Title 10 published on 2015-01-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 10 CFR Part 20 after this date.

  • 2015-03-26; vol. 80 # 58 - Thursday, March 26, 2015
    1. 80 FR 16082 - Low-Level Radioactive Waste Disposal
      GPO FDSys XML | Text
      NUCLEAR REGULATORY COMMISSION
      Proposed rule.
      Submit comments on the proposed rule by July 24, 2015. Submit comments specific to the information collection aspects of this proposed rule by May 26, 2015. Comments received after these dates will be considered if it is practical to do so, but the NRC is able to ensure consideration only for comments received on or before these dates.
      10 CFR Parts 20 and 61