Nükleer yakıt içindeki uranyumun spesifik tayini
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Date
1984-03
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Türkiye Atom Enerjisi Kurumu, Çekmece Nükleer Araştırma ve Eğitim Merkezi
Abstract
Bu çalışmada kullanılan titrasyon metodu ile 2-300 mg U- ranyum ihtiva eden nitrik asitli veya tributil fosfat-kerozen- li çözeltilerde uranyum, rutin olarak %±0.1-0.005 hata ile tayin edilebilir. Bu metodda, uranyum(VI) derişik fosforik asitli ortamda demir(II) sülfat ile uranyum(IV)'e indirgenir. Kullanılmayan fazla demir(II), nitrik asit ile ve molibden katalizörlüğünde demir(III)'e yükseltgenir. Karışıma sülfirik asit ilave edilerek seyreltilir ve uranyum(IV)1 e ekivalen miktarda açığa çıkan demir(II), potasyum dikromatla titre edilir. Eki- valens noktası platin-referans elektrod (Ag/AgCl) kullanılarak potansiyometrik metodla bulunur.
Analiz sonucunda IAEA Intercomperison SR-40 nükleer yakıt numunesinde uranyum miktarı %85.898±0.203 olarak bulunmuştur.
This titration method is satisfactory for rutin determination of uranium in nitric acid or tributyl phosphate-kerosen solution within the range 2-300 mg and a precision of±0.1-0,005 percent. The method involves reduction of uranium(VI) to (IV) by ferrous sulphate in concentrated phosphoric acid medium. The excess iron(II) is oxidised with nitric acid using molybdenum catalyst. After addition of sulphuric acid and dilution with water, the iron(II) which is equivalent to uranium(IV) is titr- rated with dichromate by potentiometric end point using.a platinum-reference electrode (Ag/AgCl) pair. IAEA Intercomperison sample SR-40 has been analysed and uranium concentration has been found as 85.898±0.203 percent.
This titration method is satisfactory for rutin determination of uranium in nitric acid or tributyl phosphate-kerosen solution within the range 2-300 mg and a precision of±0.1-0,005 percent. The method involves reduction of uranium(VI) to (IV) by ferrous sulphate in concentrated phosphoric acid medium. The excess iron(II) is oxidised with nitric acid using molybdenum catalyst. After addition of sulphuric acid and dilution with water, the iron(II) which is equivalent to uranium(IV) is titr- rated with dichromate by potentiometric end point using.a platinum-reference electrode (Ag/AgCl) pair. IAEA Intercomperison sample SR-40 has been analysed and uranium concentration has been found as 85.898±0.203 percent.
Description
TENMAK D.N.. 7665
Keywords
Nuclear fuels, Nükleer yakıtlar, Uranium, Uranyum
Citation
Tuğsavul, A. ve Can, Ş. (1984) Nükleer yakıt içindeki uranyumun spesifik tayini. İstanbul : Türkiye Atom Enerjisi Kurumu, Çekmece Nükleer Araştırma ve Eğitim Merkezi.