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- E-ISSN 2288-8985
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Determination of Uranium Isotopes in Spent Nuclear Fuels by Isotope Dilution Mass Spectrometry
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2003, v.16 no.6, pp.450-457
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(2003). Determination of Uranium Isotopes in Spent Nuclear Fuels by Isotope Dilution Mass Spectrometry. Analytical Science and Technology, 16(6), 450-457.
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Abstract
The determination of uranium and its isotopes in spent nuclear fuels by isotope dilution mass spectrometry (IDMS) has been studied. The spent fuel samples were dissolved in 8 M <TEX>$HNO_3$</TEX> or its mixture with 14 M <TEX>$HNO_3-0.05M$</TEX> HF. The dissolved solutions were filterred on membrane filter with <TEX>$1.2{\mu}m$</TEX> pore size. The uraniums in the spiked and unspiked sample solutions were quantitatively adsorbed by anion exchange resin, AG 1X8 and eluted with 0.1 M HCl. The contents of uranium and its isotopes (<TEX>$^{234}U$</TEX>, <TEX>$^{235}U$</TEX>, <TEX>$^{236}U$</TEX> 및 <TEX>$^{238}U$</TEX>) in the spent fuel samples were determined by isotope dilution mass spectrometric method using <TEX>$^{233}U$</TEX> as spike. The spike reference solution was standarized by reverse isotope dilution mass spectrometry (R-IDMS) using natural and depleted uranium. The results from IDMS were in average relative difference of 0.34% when compared with those by the potentiometric titration method.
- keywords
- uranium isotope, IDMS, spent nuclear fuel, anion exchange chromatography
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