Document: 10 CFR Part 73
Document ID: 54aa87ba-52e2-431e-a375-a017c2df2a31
Document Type: cfr
Title: Definitions.
Source: 10 CFR Part 73
Source URL: https://www.ecfr.gov/current/title-10/part-73/section-73.2
Revision Date: 
Chapter: 
Section ID: 73.2
CFR Part: 73
CFR Title: 10

Content:
ion of strategic nuclear material of moderate strategic significance in this section, but more than 15 grams of uranium-235 (contained in uranium enriched to 20 percent or more in U-235 isotope) or 15 grams of uranium-233 or 15 grams of plutonium or the combination of 15 grams when computed by the equation, grams = (grams contained U-235) + (grams plutonium) + (grams U-233); or ( 2 ) Less than 10,000 grams but more than 1,000 grams of uranium-235 (contained in uranium enriched to 10 percent or more but less than 20 percent in the U-235 isotope); or ( 3 ) 10,000 grams or more of uranium-235 (contained in uranium enriched above natural but less than 10 percent in the U-235 isotope). This class of material is sometimes referred to as a Category III quantity of material. Special nuclear material of moderate strategic significance means: ( 1 ) Less than a formula quantity of strategic special nuclear material but more than 1,000 grams of uranium-235 (contained in uranium enriched to 20 percent or more in the U-235 isotope) or more than 500 grams of uranium-233 or plutonium, or in a combined quantity of more than 1,000 grams when computed by the equation, grams = (grams contained U-235) + 2 (grams U-233 + grams plutonium); or ( 2 ) 10,000 grams or more of uranium-235 (contained in uranium enriched to 10 percent or more but less than 20 percent in the U-235 isotope). This class of material is sometimes referred to as a Category II quantity of material. Spent nuclear fuel (SNF) or spent fuel means the fuel that has been withdrawn from a nuclear reactor following irradiation and has not been chemically separated into its constituent elements by reprocessing. Spent nuclear fuel includes the special nuclear material, byproduct material, source material, and other radioactive materials associated with a fuel assembly. Stand-alone preemption authority means the authority granted to the Commission, pursuant to 42 U.S.C. 2201a , to authorize licensees or the designated security