[20220513]IF12106_伊朗与核武器生产.pdf

https:/crsreports.congress.gov May 13, 2022Iran and Nuclear Weapons ProductionBackground Irans nuclear program has generated widespread concern that Tehran is pursuing nuclear weapons. According to U.S. intelligence assessments, Tehran has the capacity to produce nuclear weapons at some point, but has halted its nuclear weapons program and has not mastered all of the necessary technologies for building such weapons. (For additional information, see CRS Report RL34544, Irans Nuclear Program: Status, by Paul K. Kerr.) Since the early 2000s, Tehrans construction of gas centrifuge uranium enrichment facilities has been the main source of proliferation concern. Gas centrifuges enrich uranium by spinning uranium hexafluoride (UF6) gas at high speeds to increase the concentration of the uranium-235 (u-235) isotope. Such centrifuges can produce both low-enriched uranium (LEU), which can be used in nuclear power reactors, and highly enriched uranium (HEU), which is one of the two types of fissile material used in nuclear weapons. Tehran asserts that its enrichment program is meant to produce fuel for peaceful nuclear reactors. The 2015 Joint Comprehensive Plan of Action (JCPOA) requires Ir