C.F.R. » Title 10 » CHAPTER I—NUCLEAR REGULATORY COMMISSION › PART 51—ENVIRONMENTAL PROTECTION REGULATIONS FOR DOMESTIC LICENSING AND RELATED REGULATORY FUNCTIONS › Subpart A—National Environmental Policy Act—Regulations Implementing Section 102(2)

10 C.F.R. § 51.21

Criteria for and identification of licensing and regulatory actions requiring environmental assessments

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All licensing and regulatory actions subject to this subpart require an environmental assessment except those identified in § 51.20(b) as requiring an environmental impact statement, those covered by categorical exclusions identified in § 51.22(a) through (d), and those identified in § 51.22(e) as other actions not requiring environmental review. As provided in § 51.22, the Commission may, in special circumstances, prepare an environmental assessment on an action that could be covered by a categorical exclusion.

[54 FR 27870, July 3, 1989, as amended at 91 FR 15532, Mar. 30, 2026]
Notes of Decisions
Cited in 3 cases (2 in the last 5 years), 1994–2022 · leading case: Ohio Nuclear-Free Network v. NRC, 53 F.4th 236 (D.C. Cir. 2022).
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Ohio Nuclear-Free Network v. NRC, 53 F.4th 236 (D.C. Cir. 2022). “10 C.F.R. § 51.21 ; see Myersville Citizens for a Rural Cmty.”
New Jersey, Dep't of Env't Prot. & Energy v. Long Island Power Auth., 30 F.3d 403 (3rd Cir. 1994). “29010-11 (1993); see 10 C.F.R. §§ 51.21 , 51.25 2 ; 42 U.S.C. § 4332 (2)(C) (1988).”
Ohio Nuclear-Free Network v. NRC (D.C. Cir. 2022). “10 C.F.R. § 51.21 ; see Myersville Citizens for a Rural Cmty.”
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