Abstract
A rapid determination method in which beta-ray spectrometry was combined with solid phase extraction using Sr Rad Disk was developed for the determination of 89Sr and 90Sr in low-level radioactive waste. Various amounts of 89Sr, 90Sr, and 90Y retained by the Sr Rad Disk was measured by a beta-ray spectrometer, and it was found that both 89Sr and 90Sr were simultaneously determined with <30% error (2σ) at 89Sr/90Sr radioactivity ratio of 0.3 to 45. The present method was successfully applied to actual radioactive liquid waste samples arising from nuclear facilities in Japan Atomic Energy Agency. Strontium was simply separated from interfering nuclides such as 137Cs and 154Eu, and matrix components by the Sr Rad Disk, and the results obtained by beta-ray spectrometry was in good agreement with that of the conventional analysis.
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