H2 gas production in calcium silicate hydrates: influence of water content and radiation induced defects

Jeremy Haas (1) , Stéphane Esnouf (2) , Jean-Philippe Renault (3) , Adeline Dannoux-Papin (1) , Chengying Yin (1)

1 LCBC - Laboratoire d’étude des Ciments et Bitumes pour le Conditionnement
2 LRMO - Laboratoire de Radiolyse et de la Matière Organique
3 LIONS - Laboratoire Interdisciplinaire sur l'Organisation Nanométrique et Supramoléculaire

Water radiolysis is a major concern for the conditioning of radioactive waste in cement materials. Synthetic calcium silicate hydrate (CSH), the main hydrates of concrete, were synthesized with different C/S ratios and relative humidities. The samples were irradiated under γ- and electron beam irradiation. The radiolytic hydrogen production has been quantified and the radiation induced defect produced at low temperature characterized by electron paramagnetic resonance. The results show that the H production and defect production are only marginally sensitive to the relative humidity

Domaines: Chimie inorganique; Radiochimie; Matériaux

Jeremy Haas, Stéphane Esnouf, Jean-Philippe Renault, Adeline Dannoux-Papin, Chengying Yin. H2 gas production in calcium silicate hydrates: influence of water content and radiation induced defects. Radiation Physics and Chemistry, 2022, 191, 10.1016/j.radphyschem.2021.109865. ⟨10.1016/j.radphyschem.2021.109865⟩. ⟨cea-03517207⟩