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Determination of actinides and ▫${90}Sr$▫ in spent ion exchange resins
Tavčar, Polona, 1975- ; Benedik, Ljudmila
n the present work, we focused on determination of some important activation products like 238Pu, 239Pu/ 240Pu, 241Am, and 237Np, and 90Sr as a fission product in spent ion exchange resins. The ...activation products of interest are alpha emitters, while 90Sr is a beta emitter. Radioactive solutions of 241Am, 238Pu, 237Np, and 90Sr and pure ion exchange resins were used to prepare artificial samples which were subsequently subjected to an analytical procedure. This consisted of wet destruction of the resins with Fenton's reagent followed by separations using ion exchange. The activities found showed good agreement with calculated values and yields were also very good (above 50%). We also analysed five samples of spent ion exchange resin from the TRIGA Mark II research reactor. Activities of selected radionuclides were below expectations in all samples except in sample 1, which had higher activities of 90Sr, 137Cs, 60Co, 152Eu, and 154Eu. Total beta/gamma activity did not exceed the max. permitted level for low level waste.
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