title: Accurate determination of ¹²⁹I concentrations and ¹²⁹I/¹³⁷Cs ratios in spent nuclear resins by Accelerator Mass Spectrometry.
abstract: Determining long-lived radionuclide concentrations in radioactive waste has fundamental implications for the long-term management of storage sites. This paper focuses on the measurement of low (129)I contents in ion exchange resins used for primary fluid purification in Pressurised Water Reactors (PWR). Iodine-129 concentrations were successfully determined using Accelerator Mass Spectrometry (AMS) following a chemical procedure which included (1) acid digestion of resin samples in HNO3/HClO4, (2) radioactive decontamination by selective iodine extraction using a new chromatographic resin (CL Resin), and (3) AgI precipitation. Measured (129)I concentrations ranged from 4 to 12 ng/g, i.e. from 0.03 to 0.08 Bq/g. The calculation of (129)I/(137)Cs activity ratios used for routine waste management produced values in agreement with the few available data for PWR resin samples.
authors: CEA, DEN, DEC, SA3C, LARC, F-13108 Saint-Paul-lez-Durance, France. Electronic address: enottoli@hotmail.fr.
authors: Emmanuelle
authors: E
authors: Nottoli
authors: CEA, DEN, DEC, SA3C, LEMCI, F-13108 Saint-Paul-lez-Durance, France. Electronic address: philippe.bienvenu@cea.fr.
authors: Philippe
authors: P
authors: Bienvenu
authors: CEA, DEN, DEC, SA3C, LARC, F-13108 Saint-Paul-lez-Durance, France. Electronic address: alexandre.labet@cea.fr.
authors: Alexandre
authors: A
authors: Labet
authors: Aix-Marseille University, CNRS, IRD, CEREGE UM34, F-13545 Aix-en-Provence, France. Electronic address: bourles@cerege.fr.
authors: Didier
authors: D
authors: Bourlès
authors: Aix-Marseille University, CNRS, IRD, CEREGE UM34, F-13545 Aix-en-Provence, France. Electronic address: arnold@cerege.fr.
authors: Maurice
authors: M
authors: Arnold
authors: CEA, DEN, DEC, SA3C, LARC, F-13108 Saint-Paul-lez-Durance, France. Electronic address: maite.bertaux@cea.fr.
authors: Maité
authors: M
authors: Bertaux
mesh_terms: D002588:Cesium Radioisotopes / Q000032:analysis*; D003666:Decontamination; D007457:Iodine Radioisotopes / Q000032:analysis*; D007475:Ion Exchange Resins / Q000032:analysis*; D013058:Mass Spectrometry / Q000379:methods; D011850:Radioactive Waste / Q000032:analysis*
chemical_list: D002588:Cesium Radioisotopes; D007457:Iodine Radioisotopes; D007475:Ion Exchange Resins; D011850:Radioactive Waste
keywords: (129)I; Accelerator mass spectrometry; PWR resin samples