For the purposes of 10 CFR § 110.21 (b)(1), what is an effective kilogram?
This is a special unit used in safeguarding (for material control and accounting purposes) nuclear material. In the case of import/export, effective kilograms is used for special nuclear material, which means: (1) For plutonium and uranium-233, their weight in kilograms;(2) For uranium enriched 1 percent or greater in the isotope U-235, its element weight in kilograms multiplied by the square of its enrichment expressed as a decimal weight fraction; and(3) For uranium enriched below 1 percent in the isotope U-235, its element weight in kilograms multiplied by 0.0001 (10 CFR § 110.2).Commission (rather than only NRC staff) review is required for applications to export more than one effective kilogram of high enriched uranium, plutonium, or U-233 (10 CFR § 110.40 (b) (2)). Additionally, Executive Branch review is required for applications to export more than one effective kilogram of high enriched uranium, or 10 grams of plutonium or U-233(10 CFR § 110.41 (a) (2)).
