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Enriched uranium is a type of uranium in which the percent composition of uranium-235 (written 235 U) has been increased through the process of isotope separation.Naturally occurring uranium is composed of three major isotopes: uranium-238 (238 U with 99.2732–99.2752% natural abundance), uranium-235 (235 U, 0.7198–0.7210%), and uranium-234 (234 U, 0.0049–0.0059%).
Natural uranium is made weapons-grade through isotopic enrichment. Initially only about 0.7% of it is fissile U-235, with the rest being almost entirely uranium-238 (U-238). They are separated by their differing masses. Highly enriched uranium is considered weapons-grade when it has been enriched to about 90% U-235. [citation needed]
Due to their higher thermal velocity, the free molecules leave the axis of the molecular beam faster than the clusters. The latter are therefore enriched in the part transmitted by a skimmer nozzle downstream, whereas the non-transmitted fraction is enriched in the 235 UF 6. The enrichment factor is the better, the larger the transmitted ...
Under the IAEA’s definition, around 42 kilograms (92.5 pounds) of uranium enriched to 60% purity is the amount at which creating one atomic weapon is theoretically possible — if the material ...
The plant had already been enriching uranium to up to 60% purity with material enriched to up to 5% purity. The material being fed in now has been enriched to up to 20% purity, accelerating the ...
By IAEA’s definition, around 42 kilograms (92.5 pounds) of uranium enriched to 60% is the amount at which creating one atomic weapon is theoretically possible — if the material is enriched ...
Yellowcake (also called urania) is a type of powdered uranium concentrate obtained from leach solutions, in an intermediate step in the processing of uranium ores. It is a step in the processing of uranium after it has been mined but before fuel fabrication or uranium enrichment. Yellowcake concentrates are prepared by various extraction and ...
Iran's stock of uranium in UF6 form enriched to up to 60% purity, close to the roughly 90% of weapons grade, grew by an estimated 22.6 kg to 164.7 kg, one of the reports said.