§ 20.1005 Units of radioactivity.
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Title 10 CFR: Energy › Chapter I: NUCLEAR REGULATORY COMMISSION › Part 20: STANDARDS FOR PROTECTION AGAINST RADIATION › Subpart A: General Provisions › § 20.1005: § 20.1005 Units of radioactivity.
Text
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]
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