A separation procedure for the analysis of Sr-90, Eu-154, and the actinides Np-237, Pu-239, Am-241 and Cm-244

A procedure for the analysis of Sr-90, Eu-154, Np-237, Pu-239, Am-241 and C m242-244 was developed. Separation was done with the separating agent, di-2 (ethyl hexyl)-phosphoric acid (HDEHP), and results in fractions containing the different elements to be analysed. 90Sr analysis was done by analysing its daughter nuclide Y-90, detected through the Cherenkov radiation emitted by this high energy beta(-)-emitter. Eu-154 was detected using gamma-spect rometry with a lower Compton background as a result of the removal of other fission products. Am-241 could also be detected with gamma-spectrometry or together with Cm242-244 With alpha-spectrometry. The long-lived radionucli des Np-237 and Pu-239 were detected using inductively coupled plasma mass s pectrometry (ICP-MS).