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Recrystallization of 223Ra with barium sulfate |
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| Authors: | Natallia Torapava Henrik Ramebäck Enzo Curti Petra Lagerkvist Christian Ekberg |
| Institution: | 1. Department of Chemical and Biological Engineering, Nuclear Chemistry, Chalmers University of Technology, 41296, Gothenburg, Sweden 2. Division of CBRN Defence and Security, Swedish Defence Research Agency, 90182, Ume?, Sweden 3. Laboratory for Waste Management, Nuclear Energy and Safety Research Department, Paul Scherrer Institute, 5232, Villigen, Switzerland |
| Abstract: | In this work, the kinetics of barium sulfate recrystallization has been studied in acidic 0.01 mol dm?3 sodium sulfate solution using 223Ra and 133Ba tracers at very low total radium concentration, i.e. less than 10?13 mol dm?3. It was found that the system follows the homogeneous recrystallization model and that recrystallization rates, inferred by the decrease of 223Ra and 133Ba in the aqueous solution, are fast. Therefore, even at very low concentrations, below the solubility limit, radium will be retained by barium sulfate—a mineral present in the deep underground repository. |
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