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06:54 Nov 6, 2008
English to Romanian translations [PRO]
Tech/Engineering - Mining & Minerals / Gems
Additional field(s): Nuclear Eng/Sci
English term or phrase: yellow cake
Definition from European Nuclear Society:
Yellow cake is the final product of the milling of uranium ore. It contains about 80 % of uranium oxide and is usually represented by the formula U3O8. The yellow cake produced by most modern mills is actually brown or black, not yellow; the name comes from the colour and texture of the concentrates produced by early mining operations due to impurities from ammonium diuranate (NH4)2U2O7.

Example sentence(s):
  • The solvents are removed by evaporating in a vacuum and ammonium diuranate, (NH4)2U2O7, is precipitated by adding ammonia to neutralize the solution. The diuranate is then heated to yield a purified, solid U3O8, known as yellow cake. Kennesaw State University
  • On site, close to the mines, the uranium is concentrated and transformed into a yellow powder, commonly called yellow cake, which contains 75% of uranium. It is in this form that the uranium is marketed. planete-energies.com
  • The first stage of this process is to dissolve the yellow cake in nitric acid; solvent extraction using tributyl phosphate in a hydrocarbon solution extracts the uranium from the various impurities and then the extract is washed with dilute nitric acid to produce uranyl nitrate in a very pure form. landmarkminerals.com
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Enrique
Enrique
Argentina


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Summary of translations provided
4 +1concentrat de uraniu
Radu DANAILA


Discussion entries: 2





  

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62 days   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +1
concentrat de uraniu


Definition from Wikipedia:
Yellowcakes (cunoscute de asemenea şi ca urania, singular uranium), în română prăjituri galbene, reprezintă un amestec de concentrate de uraniu obţinute prin extracţie dintr-un amestec ce conţine oxizi de uraniu folosind un dizolvant selectiv.
Iniţial, compoziţia şi procentajul diferiţilor compuşi ai uraniului din aceste yellowcakes nu fuseseră identificate. Astfel, în 1970, Biroul Minelor al Statelor Unite ale Americii se referea la aceste compozite ca precipitate finale ale procesului industrial de formare al unor săruri de uraniu, considerându-le combinaţii di-uraniu fie de amoniu şi/sau sodiu. Compoziţiile variau într-adevăr în limite largi, depinzând de zăcământ, metoda de extracţie şi condiţiile de precipitare şi dizolvare selectivă.
Compoziţiile diferitelor yellowcakes sunt diferite, depinzând de factori multipli. Compoziţiile pot fi variabile şi depind de mulţi factori printre care compoziţia zăcământului, solventul folosit şi condiţiile de precipitare sunt cele mai importante. Printre compuşii identificaţi în aceste "prăjituri" se numără şi hidroxid de uranil, sulfat de uranil, para-uraniat de sodiu şi proxid de uranil, alături de diferiţi oxizi ai uraniului. Compoziţiile acestor concentrate moderne conţin tipic 70 % până la 90 % octo-oxid de tri-uraniu (U3O8) în procente masice. Există şi alţi oxizi de uraniu, aşa cum sunt dioxid de uraniu (UO2) şi trioxid de uraniu (UO3), dar procentajul acestora în yelowcakes este realmente redus.
Compozitele yellowcake sunt folosite în prepararea combustibilului nuclear al reactoarelor nucleare, fiind înainte procesate pentru a fi transformate integral în dioxid de uraniu pur (UO2) pentru a fi utilizate ca bare de combustibil în reactoarele de tip PHWR (conform expresie Pressurised Heavy Water Reactor) şi/sau alte sisteme care utilizează uraniu ne-îmbogăţit. Pot fi de asemena folosite pentru a obţine uraniu îmbogăţit prin transformarea acestora hexafluorură de uraniu, un gaz, (UF6), din care prin separare izotopică prin unul din procedeele de difuzie gazoasă sau centrifugare gazoasă poate fi relativ uşor transformat în uraniu îmbogăţit utilizabil în producerea de arme nucleare sau în producerea energiei electrice în reactoare nucleare.

Example sentence(s):
  • "Armata americana a transferat, la cererea Irakului, aproape sase sute de tone de concentrate de uraniu ("Yellowcake" - "prajituri galbene") din Irak, spre Canada, intr-o operatiune secreta care a durat mai multe saptamani, a anuntat luni Pentagonul." - Articol  
  • Suspendarea activitatii uzinei UCF care converteste pulberea de uraniu (yellow cake) in hexafluorura de uraniu (UF6) a condus la disponibilizarea a 1000 de lucratori/angajati. - Nuclearelectrica  
  • Iranul a acceptat în octombrie 2003 să-şi suspende activităţile de îmbogăţire a uraniului. AIEA, sâmbătă, i-a cerut însă să extindă această măsură şi la activităţile aflate în amonte pe fluxul tehnologic, precum fabricarea maşinilor de centrifugare şi convertirea “yellow cake” (stadiul preliminar al uraniului). Document: Articol: "Iranul nu acceptă să-şi suspende toate activităţile de îmbogăţire a uraniului", in "Gazeta de nord-vest" din 20 septembrie 2004 - Gazeta Nord-Vest, 20.09.2004  

Explanation:
Iata si o alta definitie, oferita de Dictionarul Englez Roman:
yellow cake = concentrat de uraniu (U3O8 - formă sub care acesta este comercializat pe piaţa mondială)

Si iata si o confirmare a acestei definitii:
"Yellowcake is milled uranium oxide, known to chemists as U3O8. When uranium ore comes out of the mine, it actually contains fairly little of the precious radioactive element. Though some mines in Canada, the world's leading uranium producer, are now yielding ore that contains 20 percent uranium, lower purity levels are more typical. Ore that contains less than 1 percent uranium is not unusual."
Document: Article: " What Is Yellowcake, Anyway?"
Link: http://www.slate.com/id/2085848/



Cateva alte referinte:

"Yellow cake is the final product of the milling of uranium ore. It contains about 80 % of uranium oxide and is usually represented by the formula U3O8. The yellow cake produced by most modern mills is actually brown or black, not yellow; the name comes from the colour and texture of the concentrates produced by early mining operations due to impurities from ammonium diuranate (NH4)2U2O7."
Document: European Nuclear Society info pool/glossary
Link: http://www.euronuclear.org/info/encyclopedia/y/yellow-cake.h...


"concentré uranifère = uranium concentrate = yellow cake"
Document: Grand Dictionnaire Terminologique
Link: http://www.granddictionnaire.com/btml/fra/r_motclef/index102...


"Yellowcake" is another name for uranium oxide, named for its colour and texture. After uranium is mined and separated from ore, it is made into "yellowcake" and shipped to a conversion plant for more processing. Uranium must first be converted into a gaseous form and then go through a long process of "enrichment" before a nuclear power plant can use it. Nuclear power plants generate around 20 percent of the electricity produced in the United States."
Document: Energy Slang Page
Link: http://www.eia.doe.gov/kids/energy_fungames/energyslang/yell...


"The overall objective of uranium extraction chemistry is the preparation of U3O8, called yellow cake. Extraction of uranium is often difficult and the metallurgical procedures vary with the geological environment of the ore. The ore is first crushed and ground to liberate mineral particles. The amphoteric oxide is then leached with sulphuric acid."
Document: Article: "Nuclear Chemistry Uranium Production", by. Dr. Frank Settle
Link: http://www.chemcases.com/nuclear/nc-06.htm


Dictionnaire Framatome
Yellow cake = concentré uranifère
Radu DANAILA
Romania
Local time: 13:32
Native speaker of: Native in RomanianRomanian

Votes in favor of/against selecting this as the best translation of the term asked
Yes  Elvira Tatucu: Da, colocvial, e vorba de concentratul de uraniu - la Cernavodă inginerii o numesc "turtă" (bineînţeles, tot colocvial)
307 days
  -> multumesc!
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