In the industry it is called Hex. Chemically UF6 - Uranium Hexafluoride.
Uranium 235 is a natural isotope of uranium (the concentration is approx. 0,7 %); uranium 235 is separated from the other uranium isotopes by different methods (centrifugation, gaseous diffusion;also on small scale by laser, mass spectrometric, ion exchange, etc.).
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Uranium-235 is not added to natural uranium, it is extracted from natural uranium by a process called enrichment.
One of several methods of enriching uranium (increasing the percentage of uranium-235 in the product).Gaseous diffusion uses porous nickel metal membranes as diffusion barriers. Pumps increase the pressure of the uranium hexafluoride gas on one side of the barriers causing the gas to diffuse through. The lighter uranium-235 atoms moving slightly faster than the uranium-238 atoms, becoming a bit more concentrated on the far side.The enriched product on the far side is then sent on to the next stage in the cascade while the depleted product on the near side is sent back to the preceding stage. Then after thousands of these stages, each providing a tiny amount of enrichment, the final product having the desired enrichment is produced (as well as large quantities of depleted waste product).
Natural uranium consists of mainly U238 with about 0.7 percent U235, which is the fissile one, so enrichment is to raise the proportion of U235, which can be done by diffusion or by centrifuging, because of the slight difference in density, using uranium hexafluoride which is gaseous.
Centrifuges are one method of enriching Uranium. Depending on how much you enrich it the Uranium can be usable as either reactor fuel or nuclear weapon explosive.Other methods of enrichment include:gaseous diffusioncalutronsthermal diffusion
Enrichment of uranium in the isotope uranium 235 is made by gaseous diffusion or by centrifugation.
Natural uranium is mostly U-238, with only 0.7% U-235 which is the fissile isotope. In reactors of the PWR and BWR types, the proportion of U-235 is increased to about 5% by enrichment, either gaseous diffusion or in centrifuges.
Enrichment of uranium in the isotope 235U by: - centrifugal separation - gaseous diffusion separation - many other methods - not so important today
See the link below for an MSDS on uranium. Note that each compound has it's own MSDS. Also important is the enrichment of uranium, the quantity, the physical form of a compound, etc.
There are many ways to enrich Uranium to the 3% to 5% typically used in power plant reactors and gas centrifuges are one of the most efficient and economical way to do this at this time. The real issue is not if they need them, but if they are stopping at that level of enrichment or are their plants designed instead to go all the way to weapons grade enrichment levels: e.g. 80% to 95%.
Uranium 235 is a natural isotope of uranium (the concentration is approx. 0,7 %); uranium 235 is separated from the other uranium isotopes by different methods (centrifugation, gaseous diffusion;also on small scale by laser, mass spectrometric, ion exchange, etc.).
Enrichment of uranium-235 is done.
alerris- contributions to willard libby is mainly if it wasn't for willard we wouldn't know the gaseous diffusion separation and enrichment of the uranium-235
A cascade is a stage in the process of uranium enrichment; a plant has thousands successive cascades.
Centrifuges are used for enriching ura nium in the U-235 isotope. They work with gaseous uranium hexafluoride, if you have a long line of hundreds of centrifuges and pass the gas through them, you can gradually spin off some of the heavier U-238 resulting in a main stream with a greater percentage of U-235. This method has been used in Europe for many years and uses much less power than the older gaseous diffusion method which has been continued in the US, but I think that is now changing to centrifuges. This is what the State Dept is so concerned about happening in Iran. If you have enough centrifuges you can get nearly pure U-235 out which of course can be used in weapons.
Classified information that is not disclosed to the public.