10 CFR 20.1005 - Units of radioactivity.

Status message

There is 1 rule appearing in the Federal Register for 10 CFR 20. View below or at eCFR (GPOAccess)
§ 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 2014-01-01

The following are only the Rules published in the Federal Register after the published date of Title 10.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2014-11-10; vol. 79 # 217 - Monday, November 10, 2014
    1. 79 FR 66598 - Miscellaneous Corrections
      GPO FDSys XML | Text
      NUCLEAR REGULATORY COMMISSION
      Final rule.
      This rule is effective on December 10, 2014.
      10 CFR Parts 2, 15, 19, 20, 26, 30, 40, 50, 51, 52, 55, 60, 61, 63, 70, 71, 72, 73, and 76

Title 10 published on 2014-01-01

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

  • 2014-11-20; vol. 79 # 224 - Thursday, November 20, 2014
    1. 79 FR 69065 - Radiation Protection
      GPO FDSys XML | Text
      NUCLEAR REGULATORY COMMISSION
      Advance notice of proposed rulemaking; extension of comment period.
      The comment period in the notice published on July 25, 2014 (79 FR 43284) is extended. Comments should be filed no later than March 24, 2015. Comments received after this date will be considered if it is practical to do so, but the Commission is able to ensure consideration only for comments received on or before this date.
      10 CFR Part 20