A question about Centrifuges? ( used to enrich Uranium )?
85747
I really don't know how those centrifuges look like, but they separate the Uranium into their isotopes (235 and 238) because of the different masses between them.\n\nTry this http://www.exportcontrols.org/centrifuges.html
362038
they lack the number of centrifuges to have at least 90% enriched uranium\n\nthey lack the trigger mechanism for a nuclear device\n\nthey lack the expertise to put it into a delivery system such as a war head.\n\nThe estimated time to do the above is anywhere from 2012 to 2015.  these are major technical hurdles that need to be crossed.
946517
It was low-enriched uranium, not weapons grade. So the answer is NONE. No nukes with THAT uranium. It would have to be enriched , and would amount to a miniscule amount after that.\n\n"could potentially be used in a radiological dispersal device," or dirty bomb.
1093836
Centrifugal force and gravity.
905264
plutonium. neptunium, mercury ,uranium
794130
Do you mean enrichment?\n\nIf so \n\nNE is the process of concentrating specific isotopes of a chemical element by removing other isotopes, for example separating natural uranium into enriched uranium and depleted uranium. This is the crucial process in the creation of a nuclear weapon.\n\nWhile in general chemical elements can be purified through chemical processes, isotopes of the same element have nearly identical chemical properties, which makes this type of separation impractical, except for separation of deuterium.
116691
Chromatographyis a way to seperate out different parts of a mixture.  The idea is that you pass a fluid (either a gas or a liquid) down a long path, and the different molecules will move at different rates.  THat's the long and short of it.  So the molecules that move fastest get to the end first, and the slowest come out last.  You seperate things by making them race, and similar chemicals will take a similar amount of time to finish the race.\n\nI'm assuming that you're getting confused by things like "solid phase" and "mobile phase" and "bind affinity" and such.  The idea though is that you set up different types of obstacles depending on which things you want to win the race.  Sometimes this is dine by using something with a lot of positive charges, so that things with negative charges will get stuck and the things that are neutral or positively charged will win the race. Sometimes you sort things by size, by using a gel as an obstable with a bunch of little pores in it: little guys get lost inside and the fat guy wins the race.  With gases, you can just make the race really, really, really long, and the lightest parts will move the quickest while the hevy boys lag behind (this is a way that uranium is enriched for nuclear reactors and bombs).
494583
A few years ago (1980s) a company was marketing a nuclear device for determining metal content of rocks.  This was a hand held device, and it worked very well.  I don't remember the manufacturer, but I know that it existed, and I saw it work.  The only problem was the nuclear source material.  In order to penetrate to any depth in the rock, it's nuclear source needed to be very powerful.  I think this was considered too much of a liability, and the company quit manufacturing the device.  I'm sure that you can still find one around.  I saw this demonstrated at a geologist's convention in Reno.  I think it was 1983 or 1984.
434979
It is possible to enrich tritium-containing water by sub-boiling-point evaporation - heavier water molecules have a slightly lower "steam pressure" (likelihood to evaporate).\n\nIt is not possible (ok, not feasible - the effort is far greater than de-salting sea water) to remove all tritium from drinking water this way. In case of tritium-rich water supply the easiest way to avoid it is using different water for drinking.
194993
Maybe you are asking for Uranium decay?\n\nCheck this link  http://www.ieer.org/fctsheet/uranium.html
823456
I wouldn't believe everything you read on wiki, especially things dealing with controversial topics like nuclear energy or stem cells.\n\nNow to answer your question, I suppose that depleted uranium could be used as a reflector in a bomb, but its effects will be marginal at best, lead probabally would be a better pick. Also if Uranium was a better reflector, you would be better off using natural Uranium than depleted Uranium. Its relativity easy to get both natural Uranium and lead so worrying about depleted Uranium rounds is kind of silly.
1115151
Suppose you are collecting Uranium 238, because you want to build a better bomb.  If you were stupid enough to pile it in one place, eventually you would have enough to start a self-sustaining reaction and it would melt down.\n\nThe amount required to maintain a self-sustaining reaction is called "critical mass".\n\nFission is when you split heavy atoms, uranium or plutonium, to make lighter atoms.\n\nFusion is when you combine very light atoms, deuterium I believe, to make something heaver, like helium.  It takes a lot of evergy to get a fusion reaction going.
219420
A centrifuge is a device that NASA used to 1) test the effects of high gravity on the human body and 2) train astronauts as to the effects they would encounter during lift off.\n\nThe centrifuge is essentially a long arm mounted on a central pedestal, similar to a spinning sprinkler.  One end of the centrifuge contained a capsule that the astronaut or study subject would sit in facing the center of the centrifuge.  The other end has a counter weight.\n\nA powerful motor would spin the arm rapidly and centrifugal force would push the riders back towards the outside edge of the centrifuge.  The faster it spun, the stronger the apparent gravitational force.\n\nThe centrifuge has found its way into amusement parks with the opening of Mission:Space at Walt Disney World.  This attraction uses a centrifuge to simulate a trip into space.
51130
Cell fractionation is done when you centifuge cell material from cells that have been lysed (the cells are ripped apart by shear forces, done by things like pulling the cell suspension into a needle-tipped syringe and ejecting it, over and over).  Fractionation can be done in different ways--you can centrifuge it a one speed, then separate the pellet then raise the speed, seperate a new pellet, increase the speed even more, take out another pellet; etc.  That is called differential centrifugation.  Another way is to create a density gracient in the solvent, with the bottom of the tube containing very dense fluid while the upper parts have lower density (usually with sucrose, called sucrose gradient sedimentation) where the cell constituents will fall to the point where the density of the fluid is the exact same as the density of the constituent (so not everything will necessarily sediment to the very bottom of the tube).\n\nUltra centrifugation just refers to some incredibly high speed used in the centrifuge, but it doesn't necessarily say which type of cell fractionation method was used--it only tells you something about the speed.
424524
(m)\n\nEnrichment Process and Products\nUsing uranium as a fuel in the types of nuclear reactors common in the United States requires that the uranium be enriched so that the percentage of the uranium-235 isotope is increased, typically to 3 to 5%. Uranium enrichment is an isotopic separation process that increases the proportion of the uranium-235 isotope in relation to uranium-238 in natural uranium.\n\nThe enrichment process used in the United States involves combining uranium with fluorine to make uranium hexafluoride (UF6) followed by gaseous diffusion (see below). The UF6 output from gaseous diffusion is in two streams - one is increased, or enriched, in its percentage of U-235, and the other is reduced, or depleted, in its percentage of U-235. The depleted uranium hexafluoride product is referred to as "depleted UF6." After gaseous diffusion, the enriched uranium hexafluoride is subjected to further processing, while the depleted UF6 is generally stored.\n\nThe uranium enrichment process was first developed in the 1940s as part of the Manhattan Project.\n\nGaseous Diffusion\nIn gaseous diffusion, uranium hexafluoride is divided into two separate streams, and U-235 selectively diffuses from one stream to the other.\n\nBefore processing by gaseous diffusion, uranium is first converted from uranium oxide (U308) to uranium hexafluoride (UF6). The uranium hexafluoride (UF6) is heated and converted from a solid to a gas. The gas is then forced through a series of compressors and converters that contain porous barriers. Because uranium-235 has a slightly lighter isotopic mass than uranium-238, UF6 molecules made with uranium-235 diffuse through the barriers at a slightly higher rate than the molecules containing uranium-238. At the end of the process, there are two UF6 streams, with one stream having a higher concentration of uranium-235 than the other. The stream having the greater uranium-235 concentration is referred to as enriched UF6, while the stream that is reduced in its concentration of uranium-235 is referred to as depleted UF6. The depleted UF6 can be converted to other chemical forms, such as depleted uranium oxide or depleted uranium metal.\n\nMost of the depleted UF6 produced in the United States is stored at the locations where it was produced as a product of the gaseous diffusion enrichment process. These locations are the gaseous diffusion plants near Paducah, Kentucky, and Portsmouth, Ohio, and at the East Tennessee Technology Park (formerly the K-25 Site) at the Oak Ridge Reservation in Oak Ridge, Tennessee.\n\nIn addition to gaseous diffusion, other methods can be used to enrich uranium, producing depleted uranium as a by-product. The most common enrichment process used outside of the United States is gas centrifuge enrichment. Laser-based enrichment processes are also under development
256020
Kids bits in brackets :)\n\nAn atom bomb works by firing a proton/neutron (a little part of an atom) at a mass of uranium (nuclear material) the proton goes into the uranium and eventually hits and joins with an atom of uranium, that atom is now unstable (a bit like too many people on a ladder) so to make it self stable it loses some protons (some people fall off the ladder), usually 2 or 3 (that's the bit they call fission), these fire off and hit other atoms repeating the process in a chain. if the amount of uranium is small then a lot of the protons fly out of the uranium and do nothing, however if there is enough uranium the protons are contained in the mass and break up even more atoms, leading to a catastrophic chain reaction (KaaaaBOOOOOOM)!!! \n\n***Try shouting the last part it should get a few laughs :)\n\nPS. because the uranium lost more protons than was originally put into it as extra, it is no longer standard uranium, this is called a uranium isotope.\n\nbrubeck_take5 yeah I remember the ping-pong ball video... really cool, wouldn't mind seeing that again... gonna see if I can find it... let you know :)\n\nhere goes... thing the slow motion one is the best\n\nhttp://www.ap.stmarys.ca/demos/content/modern/mousetrap_reactor/trap_sideview_slow_high.wmv\n\nbut if you want to look at them all\n\nhttp://www.ap.stmarys.ca/demos/content/modern/mousetrap_reactor/mousetrap_reactor.html
346881
Around 20 to 30 pounds, based upon my understanding of declassified nuclear weapons design.\n\nLet's use an implosion design, not a gun design, as implosion is smaller.\n\nSo, use about a pound or two of uranium, about 10 pounds of high explosive, about 10 pounds of shielding & guts, and there you are!\n\nA suitcase nuke (yield of about 50kt) would fit into a small suitcase. It has been documented that the Soviets kept one in their embassy in DC for detonitation in case of a nuclear WWIII.