Experimental design approach for identification of the factors influencing the γ-radiolysis of ion exchange resins

C Rébufa (1) , A Traboulsi (1, 2) , V Labed (3) , Nathalie Dupuy (1) , M Sergent (1)

1 LISA - Laboratoire d'Instrumentation et Sciences Analytiques
2 SUBATECH - Laboratoire de physique subatomique et des technologies associées
3 SPDE - Service des Procedés de Décontamination et d'Enrobage des Déchets

Gamma radiolysis was investigated on a nuclear grade mixed bed ion exchange resin and its pure components under different irradiation conditions. Screening designs were performed to identify the factors influencing gas production after their γ-radiolysis and to compare their γ-degradation stability. Only hydrogen and trimethylamine quantities were considered as the response in the experimental designs. The other detected gases and water-soluble products were used to improve the resins degradation. Aerobic irradiation atmosphere decreased the H 2g production of AmbOH, MB400, and amines. The water presence increased the H 2g quantities for AmbH and decreased those for MB400 resin. Liquid water had no effect on H 2g production from AmbOH but was favorable to increased amine production. The H 2g production of AmbH increased with the absorbed dose that had little effect on the AmbOH resin. No impact of dose on the H 2g production was detected for MB400 that appeared to be less degraded.

Mots clés: Gamma irradiation; Ion exchange resin; IC; Experimental design; Gas analysis

Domaines: Chimie analytique; Polymères

C Rébufa, A Traboulsi, V Labed, Nathalie Dupuy, M Sergent. Experimental design approach for identification of the factors influencing the γ-radiolysis of ion exchange resins. Radiation Physics and Chemistry, 2015, 106, pp.223-234. ⟨10.1016/j.radphyschem.2014.07.020⟩. ⟨hal-01451454⟩