10 CFR § 2.1105 - Definitions.

---
identifier: "/us/cfr/t10/s2.1105"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "10 CFR § 2.1105 - Definitions."
title_number: 10
title_name: "Energy"
section_number: "2.1105"
section_name: "Definitions."
chapter_name: "NUCLEAR REGULATORY COMMISSION"
part_number: "2"
part_name: "AGENCY RULES OF PRACTICE AND PROCEDURE"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "Atomic Energy Act of 1954, secs. 29, 53, 62, 63, 81, 102, 103, 104, 105, 161, 181, 182, 183, 184, 186, 189, 191, 234 (42 U.S.C. 2039, 2073, 2092, 2093, 2111, 2132, 2133, 2134, 2135, 2201, 2231, 2232, 2233, 2234, 2236, 2239, 2241, 2282); Energy Reorganization Act of 1974, secs. 201, 206 (42 U.S.C. 5841, 5846); Nuclear Waste Policy Act of 1982, secs. 114(f), 134, 135, 141 (42 U.S.C. 10134(f), 10154, 10155, 10161); Administrative Procedure Act (5 U.S.C. 552, 553, 554, 557, 558); National Environmental Policy Act of 1969 (42 U.S.C. 4332); 44 U.S.C. 3504 note. Section 2.205(j) also issued under Sec. 31001(s), Pub. L. 104-134, 110 Stat. 1321-373 (28 U.S.C. 2461 note)."
regulatory_source: "27 FR 377, Jan. 13, 1962, unless otherwise noted."
cfr_part: "2"
---


# 2.1105 Definitions.

As used in this part:

(a) *Civilian nuclear power reactor* means a civilian nuclear power plant required to be licensed as a utilization facility under section 103 or 104(b) of the Atomic Energy Act of 1954.

(b) *Spent nuclear fuel* means fuel that has been withdrawn from a nuclear reactor following irradiation, the constituent elements of which have not been separated by reprocessing.