10 CFR Part 110, Appendix M to Part 110 - Categorization of Nuclear Material

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Appendix M to Part 110—Categorization of Nuclear Material
Categorization of Nuclear Material
[From IAEA INFCIRC/225/Revision 5]
Material Form Category I Category II Category III 3
1 All plutonium except that with isotopic concentration exceeding 80 percent in plutonium-238.
2 Material not irradiated in a reactor or material irradiated in a reactor but with a radiation level equal to or less than 1 Gy/h (100 rad/h) at 1 m unshielded.
3 Quantities not falling in Category III and natural uranium, depleted uranium and thorium should be protected at least in accordance with prudent management practice.
4 Although this level of protection is recommended, it would be open to States, upon evaluation of the specific circumstances, to assign a different category of physical protection.
5 Other fuel which by virtue of its original fissile material 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 (100 rad/h) at one meter unshielded.
1. Plutonium1 Unirradiated 2 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 (235U) Unirradiated 2:
—Uranium enriched to 20 percent 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.
—Uranium enriched to 10 percent 235U but less than 20 percent 235U 10 kg or more Less than 10 kg but more than 1 kg.
—Uranium enriched above natural, but less than 10 percent 235U 10 kg or more.
3. Uranium-233 (233U) Unirradiated 2 2 kg or more Less than 2 kg but more than 500 g 500 g or less but more than 15 g.
4. Irradiated Fuel (The categorization of irradiated fuel in the table is based on international transport considerations. The State may assign a different category for domestic use, storage and transport taking all relevant factors into account) Depleted or natural uranium, thorium or low enriched fuel (less than 10 percent fissile content) 4 5
[79 FR 39299, July 10, 2014]

Title 10 published on 2015-01-01.

The following are only the Rules published in the Federal Register after the published date of Title 10.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2015-12-01; vol. 80 # 230 - Tuesday, December 1, 2015
    1. 80 FR 74974 - Miscellaneous Corrections
      GPO FDSys: XML | Text
      NUCLEAR REGULATORY COMMISSION
      Final rule.
      This rule is effective December 31, 2015.
      10 CFR Parts 1, 2, 4, 7, 9, 11, 15, 19, 20, 21, 25, 26, 30, 32, 37, 40, 50, 51, 52, 55, 60, 61, 62, 63, 70, 71, 72, 73, 74, 76, 81, 95, 100, 110, 140, 150, 170, and 171

Title 10 published on 2015-01-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 10 CFR Part 110 after this date.

  • 2015-12-01; vol. 80 # 230 - Tuesday, December 1, 2015
    1. 80 FR 74974 - Miscellaneous Corrections
      GPO FDSys XML | Text
      NUCLEAR REGULATORY COMMISSION
      Final rule.
      This rule is effective December 31, 2015.
      10 CFR Parts 1, 2, 4, 7, 9, 11, 15, 19, 20, 21, 25, 26, 30, 32, 37, 40, 50, 51, 52, 55, 60, 61, 62, 63, 70, 71, 72, 73, 74, 76, 81, 95, 100, 110, 140, 150, 170, and 171