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Bur.-Up Measur.ments on Dissolver.Solution of Mixed Oxide Fuel Using HPLC-Mass Spectr.metr.c Method

Inter.ational Jour.al of Analytical Mass Spectr.metr. and Chr.matogr.phy 2013年第1期1卷 55-60页

作者： S. Ber. r. Balasubr.manian Ar.ita Datta r. sajimol S. Nalini T. S. Lakshmi Nar.simhan M. P. Antony N. Sivar.man K. Nagar.jan P. r. Vasudeva r.o Chemistr. Gr.up Indira Gandhi Centre for Atomic Research Kalpakkam India

Bur.-up measur.ment on an ir.adiated mixed oxide (MOX) test fuel pellet was car.ied out thr.ugh measur.ments on the dissolver.solution by HPLC-Ther.al Ionization Mass Spectr.metr.c (TIMS) technique. The studies car.ied out using HPLC as well as TIMS for.quantification of bur.-up value ar. descr.bed. While in one case, both the separ.tion and deter.ination of elements of inter.st (U, Pu and Nd) wer. car.ied out by HPLC;in another.case, TIMS technique was used to quantify them fr.m the HPLC separ.ted *** r.pid separ.tion pr.cedur.s developed in our.labor.tor. ear.ier.wer. employed to isolate pur. fr.ctions of the desir.d elements. The individual lanthanide fission pr.ducts (La to Eu) wer. separ.ted fr.m each other.using dynamic ion-exchange chr.matogr.phic technique wher.as ur.nium and plutonium wer. separ.ted fr.m each other.using r.ver.ed phase chr.matogr.phic technique. The pur. fr.ctions of U, Pu and Nd obtained after.HPLC separ.tion pr.cedur. for.“spiked” and “unspiked” dissolver.solutions wer. used in TIMS measur.ments for.the fir.t time in our.labor.tor.. In TIMS analysis, isotopic abundances of ur.nium, plutonium and neodymium fr.ctions obtained fr.m HPLC separ.tion pr.cedur. on an “unspiked” fuel sample wer. measur.d. For.the deter.ination of U, Pu and Nd by isotopic dilution mass spectr.metr.c technique (IDMS), known quantities of tr.cer. enr.ched in 238U, 240Pu and 142Nd wer. added to the pr.-weighed dissolver.solution and subjected to HPLC separ.tion pr.cedur.s. The isotope r.tios viz. 142Nd/(145Nd +146Nd), 238U/233U and 240Pu/239Pu in the per.inent “spiked” fr.ctions wer. subsequently measur.d by TIMS. The spikes wer. pr.-standar.ized in our.labor.tor. employing r.ver.e isotopic dilution technique against the standar. solutions available in our.labor.tor. (for.238U, 239Pu and 142Nd, standar. solutions of 233U, 239Pu (of higher.abundance than in the sample) and 150Nd wer. employed as spikes). The bur.-up values fr.m duplicate spiking exper.ments

关键词： MOX Dissolver Solution HPLC TIMS Ur.nium Plutonium Neodymium

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