Nuclear Security Regulations (SOR/2025-219)
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Regulations are current to 2026-03-17
SCHEDULE(Section 1)
Category I, II and III Nuclear Material
| Column 1 | Column 2 | Column 3 | Column 4 | Column 5 | |
|---|---|---|---|---|---|
| Item | Nuclear Substance | Form | Quantity (Category I Nuclear Material)Footnote for Category I, II and III Nuclear Material1 | Quantity (Category II Nuclear Material)Footnote for Category I, II and III Nuclear Material1 | Quantity (Category III Nuclear Material)Footnote for Category I, II and III Nuclear Material1,Footnote for Category I, II and III Nuclear Material5 |
| 1 | PlutoniumFootnote for Category I, II and III Nuclear Material2 | UnirradiatedFootnote for Category I, II and III Nuclear Material3 | 2 kg or more | Less than 2 kg, but more than 500 g | 500 g or less, but more than 15 g |
| 2 | Uranium 235 | UnirradiatedFootnote for Category I, II and III Nuclear Material3 — uranium enriched to 20% 235U or more | 5 kg or more | Less than 5 kg, but more than 1 kg | 1 kg or less, but more than 15 g |
| 3 | Uranium 235 | UnirradiatedFootnote for Category I, II and III Nuclear Material3 — uranium enriched to 10% 235U or more, but less than 20% 235U | N/A | 10 kg or more | Less than 10 kg, but more than 1 kg |
| 4 | Uranium 235 | UnirradiatedFootnote for Category I, II and III Nuclear Material3 — uranium enriched above natural, but less than 10% 235U | N/A | N/A | 10 kg or more |
| 5 | Uranium 233 | UnirradiatedFootnote for Category I, II and III Nuclear Material3 | 2 kg or more | Less than 2 kg, but more than 500 g | 500 g or less, but more than 15 g |
| 6 | Fuel consisting of depleted or natural uranium, thorium or low-enriched fuel (less than 10% fissile content)Footnote for Category I, II and III Nuclear Material4 | Irradiated | N/A | More than 500 g of plutonium | 500 g or less, but more than 15 g of plutonium |
Return to footnote 1The quantities listed refer to the aggregate of each kind of nuclear substance located at a facility, excluding the following (which are considered separate quantities):
- (a)any quantity of the nuclear substance that is not within 1 000 m of another quantity of the nuclear substance; and
- (b)any quantity of the nuclear substance that is located in a locked building or a similarly resistant structure.
Return to footnote 2All plutonium except that with isotopic concentration exceeding 80% in plutonium 238.
Return to footnote 3Material not irradiated in a reactor or material irradiated in a reactor but with a radiation level equal to or less than 1 Gy/h at 1 m unshielded.
Return to footnote 4Other fuel that by virtue of its original fissile content is classified as Category I nuclear material or Category II nuclear material before irradiation may be reduced one category level while the radiation level from the fuel exceeds 1 Gy/h at 1 m unshielded if the Commission is provided with written confirmation of the radiation level.
Return to footnote 5Quantities less than the quantities set out in column 5 for Category III nuclear material and any quantities of natural uranium, depleted uranium or thorium should be protected at least in accordance with the requirements of paragraphs 12(1)(c), (g), (h) and (j) of the General Nuclear Safety and Control Regulations.
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