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yellow cake

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23:54 Nov 5, 2008
English to Japanese 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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Summary of translations provided
Yuichi Saito


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3 days 20 hrs   confidence: Answerer confidence 4/5Answerer confidence 4/5

Definition from http://www.pref.okayama.jp/seikatsu/kans:

Example sentence(s):
  • カナダ放送協会(CBC)は6日、イラクの 旧フセイン政権が保有していた、核兵器の 材料ともなるイエローケーキ(ウラン精鉱)550トンが イラク政府からカナダ企業に売却され、米軍の 警備下で極秘に5日にモントリオール港に 到着したと報じた。 イエローケーキは旧フセイン政権が原子力開発の 拠点としていたイラク中部ツワイサの核施設に あったもので、政権崩壊後、略奪などで一部が 持ち出され、テロリストへの流出などが懸念されていた。 - ワン日記  
Yuichi Saito
United States
Local time: 00:48
Native speaker of: Native in JapaneseJapanese
Notes to answerer
MKStar 確かに「ウラン精鉱」のことですが、「イエローケーキ」で十分通用するのでは?

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