Article Dans Une Revue Spectrochimica Acta Part B: Atomic Spectroscopy Année : 2025

Quantifying the accurate content of $^{107}$Pd in a radioactive effluent using the isotope dilution technique and multi-collector ICP-MS

Résumé

The radionuclide $^{107}$Pd is a long-lived fission product that decays to $^{107}$Ag by β− emission. The accurate quantification of the $^{107}$Pd content in nuclear waste is essential in compliance with international regulations on the long-term storage of radioactive waste. Moreover, fission-produced Pd holds an economic interest through its recycling for industrial purposes. The accurate quantification of $^{107}$Pd is presently problematic due to the absence of a commercial reference material certified for 107Pd content, and because of the scarcity of $^{107}$Pd-concentrated materials. In this study, we accurately characterize a radioactive effluent for its $^{107}$Pd content using multicollector (MC)-ICP-MS and the isotope dilution technique. The radioactive effluent was analyzed as a purified Pd solution. The developed isotope-dilution method is based on the preparation and calibration of a $^{108}$Pd-enriched commercial spike solution. The repeatability of Pd isotope ratios in the radioactive effluent as obtained by MC-ICP-MS was on the order of 0.05% (2*standard deviation of n = 15 measurements). The 107Pd content in the radioactive effluent was accurately quantified with an expanded uncertainty of 0.7% at k = 2. The results obtained from the radioactive effluent are metrologically traceable to the International System of Units (SI). Lastly, the sources of uncertainty and their relative contribution on the final expanded uncertainty are determined and evaluated.
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cea-04892585 , version 1 (16-01-2025)

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Majd Homaidan Shmeit, Marina Faure, Celine Gautier, Hélène Isnard. Quantifying the accurate content of $^{107}$Pd in a radioactive effluent using the isotope dilution technique and multi-collector ICP-MS. Spectrochimica Acta Part B: Atomic Spectroscopy, 2025, 225, pp.107119. ⟨10.1016/j.sab.2025.107119⟩. ⟨cea-04892585⟩
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