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Nuclear Security Regulations

Version of the schedule from 2006-11-14 to 2024-10-14:
 


SCHEDULE 1(Section 1)

Category I, II and III Nuclear Material

Column 1Column 2Column 3Column 4Column 5
ItemNuclear SubstanceFormQuantity

(Category I)Footnote for Category I, II and III Nuclear Material1

Quantity

(Category II)Footnote for Category I, II and III Nuclear Material1

Quantity

(Category III)Footnote for Category I, II and III Nuclear Material1,Footnote for Category I, II and III Nuclear Material5

1PlutoniumFootnote for Category I, II and III Nuclear Material2UnirradiatedFootnote for Category I, II and III Nuclear Material32 kg or moreLess than 2 kg, but more than 500 g500 g or less, but more than 15 g
2Uranium 235UnirradiatedFootnote for Category I, II and III Nuclear Material3 — uranium enriched to 20% 235U or more5 kg or moreLess than 5 kg, but more than 1 kg1 kg or less, but more than 15 g
3Uranium 235UnirradiatedFootnote for Category I, II and III Nuclear Material3 — uranium enriched to 10% 235U or more, but less than 20% 235UN/A10 kg or moreLess than 10 kg, but more than 1 kg
4Uranium 235UnirradiatedFootnote for Category I, II and III Nuclear Material3 — uranium enriched above natural, but less than 10% 235UN/AN/A10 kg or more
5Uranium 233UnirradiatedFootnote for Category I, II and III Nuclear Material32 kg or moreLess than 2 kg, but more than 500 g500 g or less, but more than 15 g
6Fuel consisting of depleted or natural uranium, thorium or low-enriched fuel (less than 10% fissile content)Footnote for Category I, II and III Nuclear Material4IrradiatedN/AMore than 500 g of plutonium500 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 structure offering similar resistance to unauthorized entry.

  • 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 or II before irradiation may be reduced one category level while the radiation level from the fuel exceeds 1 Gy/h at 1 m unshielded.

  • 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 and thorium should be protected at least in accordance with prudent security practice.

  • SOR/2006-191, ss. 33, 34(F), 35, 36, 40(F)

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