The Department of Energy's National Nuclear Security Administration (NNSA)
maintains the safety, security, reliability and perfomiance of the United States nuclear
weapons stockpile. While the weapons incorporate numerous nuclear and non-nuclear
components or parts, even the non-nuclear parts are dcsignated as classified since
disclosure of related information could damage national security. The Department's high
risk property regulations stipulate that classified parts be accorded "lifecycle
accountability," including the use of site-wide inventory systems, regularly scheduled
inventories, and segregation of duties.