DETERMINATION OF NEPTUNIUM-239 FROM FALLOUT SAMPLES

An analytical procedure is described for the separation of neptunium-239 from fallout samples. Neptunium is separated from uranium, plutonium and fission products by solvent extraction method. Np (IV) is extracted from 1 M nitric acid by shaking with equal volume of 0·5 M thenoyl-tri-fluoro acetone...

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Bibliographic Details
Published in:Current science (Bangalore) 1970-02, Vol.39 (3), p.49-51
Main Authors: KHANDEKAR, R. N., SANTANI, S. B.
Format: Article
Language:English
Subjects:
Fission products
Hydrochlorides
Neptunium
Plutonium
Uranium
Xylenes
Zirconium
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Summary:An analytical procedure is described for the separation of neptunium-239 from fallout samples. Neptunium is separated from uranium, plutonium and fission products by solvent extraction method. Np (IV) is extracted from 1 M nitric acid by shaking with equal volume of 0·5 M thenoyl-tri-fluoro acetone (T.T.A.) solution in xylene and back-extracted with 8 M nitric acid. Finally, Np is co-precipitated with zirconium mandelate, and counted in a low background beta-counting set-up. The average chemical recovery by this procedure is 82·6%. Under the conditions described, very good separation of neptunium is effected from aluminium, iron, fission products, thorium, uranium and plutonium.
ISSN:0011-3891