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Uranium is a chemical element with the symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium radioactively decays, usually by emitting an alpha particle.
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 ...
Uranium is a very heavy metal that is abundant on Earth and is found in sea water as well as most rocks. Naturally occurring uranium is found in two different isotopes: uranium-238 (U-238), accounting for 99.3% and uranium-235 (U-235) accounting for about 0.7%. U-238 has 146 neutrons and U-235 has 143 neutrons.
The Valindaba site, also known as Pelindaba East or Y-plant, [1] was an experimental uranium enrichment plant, located 35 km west of Pretoria, Gauteng province, South Africa The plant's name is consistent with the South African government's policy of official secrecy that concealed the plant's role in nuclear weapons production.
In 2010, a uranium enrichment plant began operating. [7] The Yongbyon Nuclear Scientific Research Center site occupies 24.8 square kilometres (9.6 sq mi). It has two sections, the nuclear research section and a larger residential district (sometimes named Bungang or Pun’gangni), separated and surrounded by fencing. [8]
The Natural uranium (U nat) consists of three isotopes, Uranium-238 (U 238), which is 99.28% natural abundance, the Uranium-235 (U 235), which is subject of interest for energy measurement available only at 0.71%, and uranium-234, with proportion of 0.0054%.: 101 [8] The Uranium-235 is fissile but at 0.71% it cannot sustain the chain reaction ...
In a fission nuclear reactor, uranium-238 can be used to generate plutonium-239, which itself can be used in a nuclear weapon or as a nuclear-reactor fuel supply. In a typical nuclear reactor, up to one-third of the generated power comes from the fission of 239 Pu, which is not supplied as a fuel to the reactor, but rather, produced from 238 U. [5] A certain amount of production of 239
Botanical nomenclature is the formal, scientific naming of plants. It is related to, but distinct from taxonomy. Plant taxonomy is concerned with grouping and classifying plants; botanical nomenclature then provides names for the results of this process.