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Weapons-grade nuclear material is any fissionable nuclear material that is pure enough to make a nuclear weapon and has properties that make it particularly suitable for nuclear weapons use. Plutonium and uranium in grades normally used in nuclear weapons are the most common examples.
The fissile uranium in nuclear weapon primaries usually contains 85% or more of 235 U known as weapons grade, though theoretically for an implosion design, a minimum of 20% could be sufficient (called weapon-usable) although it would require hundreds of kilograms of material and "would not be practical to design"; [11] [12] even lower ...
According to the Nuclear Regulatory Commission(NRC), there are four different types of regulated nuclear materials: special nuclear material, source material, byproduct material and radium. [2] Special nuclear materials have plutonium, uranium-233 or uranium with U 233 or U 235 that has a content found more than in nature. Source material is ...
Iran has defied international demands to rein in its nuclear program and has increased its stockpile of uranium enriched to near weapons-grade levels, according to a confidential report by the ...
Iran denies pursuing nuclear weapons. Tehran already has enough material enriched to up to 60% purity to be able to make four nuclear weapons if it enriches it further, according to an IAEA yardstick.
In the arms control context, particularly in proposals for a Fissile Material Cutoff Treaty, the term fissile is often used to describe materials that can be used in the fission primary of a nuclear weapon. [6] These are materials that sustain an explosive fast neutron nuclear fission chain reaction. Under all definitions above, uranium-238 (238 U
Weapons-grade nuclear material; Y. Yellowcake; Z. Zirconium alloys This page was last edited on 8 March 2024, at 11:10 (UTC). Text is available under the Creative ...
Iran has long denied seeking nuclear weapons. Its foreign ministry said on Saturday that Tehran's nuclear programme is under continuous supervision of the UN nuclear watchdog International Atomic ...