Document ID: chunk:federal_register_of_legislation:C2024C00562:schedule:4:p10
Version: federal_register_of_legislation:C2024C00562
Segment Type: schedule
Provision Reference: sch 4 (pt 10/10)
Character Range: 245777–247260

less than 20%
                    —uranium                                                                                                                                                    10 kg or more
                    enriched above natural, but less than 10% 235U
3. Uranium‑233      Unirradiatedb                                   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                                                                Depleted or natural uranium, thorium or low‑enriched fuel (less than 10% fissile content)d e

    a All plutonium except that with isotopic concentration exceeding 80% in plutonium‑238.
    b Material not irradiated in a reactor or material irradiated in a reactor but with a radiation level equal to or less than 100 rads/hour at one metre unshielded.
    c Quantities not falling in Category III and natural uranium should be protected in accordance with prudent management practice.
    d 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.
    e Other fuel which by virtue of its original fissile material content is classified as Category I and II before irradiation may be reduced one category level while the radiation level from the fuel exceeds 100 rads/hour at one metre unshielded.