[Code of Federal Regulations]
[Title 10, Volume 1]
[Revised as of January 1, 2005]
From the U.S. Government Printing Office via GPO Access
[CITE: 10CFR20.1005]

[Page 325]
 
                            TITLE 10--ENERGY
 
                CHAPTER I--NUCLEAR REGULATORY COMMISSION
 
PART 20_STANDARDS FOR PROTECTION AGAINST RADIATION--Table of Contents
 
                      Subpart A_General Provisions
 
Sec. 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 = 3.7x10 \10\ disintegrations per second = 3.7x10 \10\ 
becquerels = 2.22x10 \12\ disintegrations per minute.

[56 FR 23391, May 21, 1991; 56 FR 61352, Dec. 3, 1991]