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Alloys containing uranium and plutonium have been prepared as candidates for use as metallic spikes for IDMS determinations of uranium and plutonium in spent fuel solutions. Three compositions, U-0.5%Pu-50%Ti, U-0.5%Pu-25%Nb-25%Zr and U-1%Pu-2.3%Nb(**), prepared by crucible-less induction melting, were selected because of good cold formability. The plutonium homogeneity was estimated to be 0.1 to 0.4% RSD for samples containing 100 mg uranium and 1 mg plutonium by a gamma-spectrometry method using 235U in the spike as an internal standard to correct for self-absorption. Metallography was carried out on buttons and foils of each of the alloys and revealed fine, homogeneous structures.

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Authors: OREA ROCHA J M, JRC Geel (BE);INGELBRECHT C D, JRC Geel (BE);CRIADO PORTAL A J, Universidad Complatense de Madrid, Facultad de C.C. Químicas (ES)
Bibliographic Reference: Paper presented: 16th World Conference of the International Nuclear Target Development Society, Padova (IT); September 21-25, 1992
Availability: Available from (1) as Paper EN 37174 ORA
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