Abstract
The goal of this study was to omit the hazardous hydrofluoric acid for silica removal before fusion of barite-concrete. Furthermore, the goal was to establish a chemical separation technique to simultaneously determine the activity concentrations of 241Am, 238Pu, 239+240Pu and 90Sr of one sub-sample. After the fusion process, using Li-metaborate/Li-tetraborate, the colloidal silica could be successfully flocculated using polyethylene glycol (PEG-2000). A chemical separation scheme using the resins DGA—BIO-RAD AG 1-X2/UTEVA—DGA and TEVA for the actinides and DGA and Sr resin for Sr was successfully established, underlined by the quantitative 243Am, 242Pu and 85Sr average tracer recoveries of at least 60%, and in best cases up to 86%.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
