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Determination of uranium in yellowcake (ammonium diuranate) - some methods:
- gravimetry by calcination to U3O8 (only for pure ADU)
- volumetry with potassium dichromate
- potentiometric titration with potassium dichromate
- X-ray spectrometry
- gravimetry as oxinate
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∙ 12y ago
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How does Uranium get to other countries?
Conventional transport, usually in the form of yellowcake, in sealed drums.
What is the chemical formula of uranium yellowcake?
Uranium has the atomic number 92 and the atomic mass 238. This mean the makeup of uranium is that is has 92 protons and 146 neutrons in the nucleus and it has 92 electrons outside the nucleus.
What is an uranium dioxide?
Any rock or mineral containing economically recoverable quantities of Uranium compounds is a Uranium ore. These compounds are most commonly various oxides, silicates, titanates, phosphates, vanadates, arsenates, etc. of Uranium.To get pure Uranium metal from the ore various processes can be used, but a basic outline of the steps goes something like:Crush the ore to particles roughly the size of dust.Mix with chemicals to dissolve the crushed ore and change the oxidation state of the Uranium separating it chemically from the ore molecules.Mix with chemicals that cause the separated Uranium atoms to react with them, forming a precipitate (a Uranium oxide called yellowcake).Filter the solution, the Uranium precipitate will stay in the filter while the rest passes through as waste. Wash in the filter to make sure none of the waste remains to contaminate the Uranium precipitate.Dry the yellowcake powder.Mix yellowcake with magnesium metal granules and heat red hot in a crucible. The mixture will ignite leaving Uranium metal in the bottom of the crucible and magnesium oxide slag on top.Uranium is usually enriched first for reactors and bombs instead of just being converted to metal, also most power reactors use enriched yellowcake not the pure metal. To enrich Uranium the basic outline goes something like this:Mix yellowcake with nitric acid, then ammonia, then hydrogen gas, then hydrofluoric acid, then fluorine gas to produce Uranium hexafluoride.The Uranium hexafluoride it heated to become a gas in an enrichment plant (e.g. gaseous diffusion, gas centrifuge). The products are enriched Uranium hexafluoride (e.g. more Uranium-235) and depleted Uranium hexafluoride (e.g. less Uranium-235) from opposite ends of the plant.The Uranium hexafluoride (of either or both types is converted back to yellowcake.
What is uranium-lead method?
the uranium-lead method is a method to determanie the age of Earth's oldest rocks
What are the two most common isotopes used as nuclear fuels?
in reactors: yellowcake, a uranium oxide; after that probably metallic uraniumin stars: ordinary hydrogen; after that helium
Where can yellowcake uranium be obtained by a private individual?
Legally impossible.
What is a rock that begins with the letter y?
Yellowcake (a Uranium bearing rock).
What is the feul for nuclear power plants and where does it come from?
Either yellow uranium oxide (yellowcake) or metallic uranium in most reactors. In moderated thermal neutron reactors the uranium is usually enriched to 3% to 5% uranium-235 isotope, in unmoderated fast neutron reactors the uranium is enriched to 20% to 95% uranium-235 isotope. This uranium comes from mines (similar to coal or iron ore mines). What is mined is usually black uranium oxide ore. This ore is processed to make unenriched yellowcake (0.7% uranium-235) and shipped to the enrichment plant. Most enrichment plants process the yellowcake to make uranium hexafloride then run that through their system, producing both enriched uranium (product) and depleted uranium (waste). The enriched uranium hexafloride is then processed back to yellowcake and shipped to a finishing plant that uses it to make the required fuel assemblies.
How does Uranium get to other countries?
Conventional transport, usually in the form of yellowcake, in sealed drums.
How can you prove uranium is present in a solution?
Applying a method of analytical chemistry to this solution; also testing with a gamma rays radiometer.
What is the chemical formula of uranium yellowcake?
Uranium has the atomic number 92 and the atomic mass 238. This mean the makeup of uranium is that is has 92 protons and 146 neutrons in the nucleus and it has 92 electrons outside the nucleus.
What has the author June H Taylor written?
June H. Taylor has written: 'Yellowcake' -- subject(s): Cartels, Uranium industry
What are the most common nuclear fuels?
in reactors: yellowcake, a uranium oxide; after that probably metallic uraniumin stars: ordinary hydrogen; after that helium
What is a scientific word that starts with an y?
There is an element called Yttrium, atomic number 39. Refined uranium ore is called yellowcake.
What is an uranium dioxide?
Any rock or mineral containing economically recoverable quantities of Uranium compounds is a Uranium ore. These compounds are most commonly various oxides, silicates, titanates, phosphates, vanadates, arsenates, etc. of Uranium.To get pure Uranium metal from the ore various processes can be used, but a basic outline of the steps goes something like:Crush the ore to particles roughly the size of dust.Mix with chemicals to dissolve the crushed ore and change the oxidation state of the Uranium separating it chemically from the ore molecules.Mix with chemicals that cause the separated Uranium atoms to react with them, forming a precipitate (a Uranium oxide called yellowcake).Filter the solution, the Uranium precipitate will stay in the filter while the rest passes through as waste. Wash in the filter to make sure none of the waste remains to contaminate the Uranium precipitate.Dry the yellowcake powder.Mix yellowcake with magnesium metal granules and heat red hot in a crucible. The mixture will ignite leaving Uranium metal in the bottom of the crucible and magnesium oxide slag on top.Uranium is usually enriched first for reactors and bombs instead of just being converted to metal, also most power reactors use enriched yellowcake not the pure metal. To enrich Uranium the basic outline goes something like this:Mix yellowcake with nitric acid, then ammonia, then hydrogen gas, then hydrofluoric acid, then fluorine gas to produce Uranium hexafluoride.The Uranium hexafluoride it heated to become a gas in an enrichment plant (e.g. gaseous diffusion, gas centrifuge). The products are enriched Uranium hexafluoride (e.g. more Uranium-235) and depleted Uranium hexafluoride (e.g. less Uranium-235) from opposite ends of the plant.The Uranium hexafluoride (of either or both types is converted back to yellowcake.
What is uranium-lead method?
the uranium-lead method is a method to determanie the age of Earth's oldest rocks
Name some scientific words starting with the letter y?
There is an element called Yttrium, atomic number 39. Refined uranium ore is called yellowcake.
