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Determination of Uranium Isotopes in Spent Nuclear Fuels by Isotope Dilution Mass Spectrometry  

Kim, Jung Suk (Nuclear Chemistry Research Department, KAERI)
Jeon, Young Shin (Nuclear Chemistry Research Department, KAERI)
Son, Se Chul (Nuclear Chemistry Research Department, KAERI)
Park, Soon Dal (Nuclear Chemistry Research Department, KAERI)
Kim, Jong Goo (Nuclear Chemistry Research Department, KAERI)
Kim, Won Ho (Nuclear Chemistry Research Department, KAERI)
Publication Information
Analytical Science and Technology / v.16, no.6, 2003 , pp. 450-457 More about this Journal
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 $HNO_3$ or its mixture with 14 M $HNO_3-0.05M$ HF. The dissolved solutions were filterred on membrane filter with $1.2{\mu}m$ 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 ($^{234}U$, $^{235}U$, $^{236}U$ 및 $^{238}U$) in the spent fuel samples were determined by isotope dilution mass spectrometric method using $^{233}U$ 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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