Special nuclear material

[3] After the creation of the Nuclear Regulatory Commission by the Energy Reorganization Act, it took over the responsibility of classifying and controlling access to SNM.

[1] The distinction between SNM and SSNM is due to the fact that uranium-235 is typically found mixed with other isotopes such as Uranium-238.

[4] Category II (Special nuclear material of moderate strategic significance) is defined as Category III (Special nuclear material of low strategic significance) is: Individuals with access to special nuclear material require an access authorization (security clearance) from the NRC or DOE.

[7] NRC-R requires the same Tier 3 background investigation as L, and permits access to protected areas in nuclear facilities.

NRC-U requires a Tier 5 investigation, similar to Q, and allows access to all three categories of nuclear material.