C.F.R. » Title 10 » CHAPTER I—NUCLEAR REGULATORY COMMISSION › PART 20—STANDARDS FOR PROTECTION AGAINST RADIATION › Subpart A—General Provisions

10 C.F.R. § 20.1005

Units of radioactivity

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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]
Notes of Decisions
Cited in 1 case, 2012–2012 · leading case: McMunn v. Babcock & Wilcox Power Generation Grp., Inc., 896 F. Supp. 2d 347 (W.D. Pa. 2012).
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McMunn v. Babcock & Wilcox Power Generation Grp., Inc., 896 F. Supp. 2d 347 (W.D. Pa. 2012). “Plaintiffs then describe how the PAA and Pennsylvania law intersect, in that: 1) demonstrating that a defendant caused a nuclear release in excess of applicable federal statutes establishes two of the four elements necessary to bring a PAA case in Pennsylvania, namely duty by…”
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