Influence of temperature and relative humidity on vapor hydration of an AVM nuclear waste glass

Sathya Narayanasamy (1) , Patrick Jollivet (1) , Loryelle Sessegolo (2, 3, 4) , Frederic Angeli (1) , Abdesselam Abdelouas (5)

1 LCLT - Laboratoire d'Etudes du Comportement à Long Terme des matériaux de conditionnement
2 LISA (UMR_7583) - Laboratoire Interuniversitaire des Systèmes Atmosphériques
3 LISA (UMR_7583) - Laboratoire Interuniversitaire des Systèmes Atmosphériques
4 IPSL (FR_636) - Institut Pierre-Simon-Laplace
5 SUBATECH - Laboratoire de physique subatomique et des technologies associées

• The vapor hydration rate, calculated from the thickness of the homogeneous altered layer, follows Arrhenius law for temperature dependence between the temperature range 50°C-90°C. • Network-hydrolysis is the predominant rate controlling mechanism for the studied duration. • Nature/identity of secondary phases vary as function of both temperature and relative humidity and the nature of the altered surface varies as a function of relative humidity. • XRD patterns indicated the presence of precipitates containing rare-earth elements and transition metals only on the samples altered at lower relative humidity values (50% and 76%).

Mots clés: Vapor hydration; Glasses; Gel layer; Secondary phases; Mechanisms

Domaines: Physique [physics]

Sathya Narayanasamy, Patrick Jollivet, Loryelle Sessegolo, Frederic Angeli, Abdesselam Abdelouas. Influence of temperature and relative humidity on vapor hydration of an AVM nuclear waste glass. Journal of Nuclear Materials, 2021, 543, pp.152571. ⟨10.1016/j.jnucmat.2020.152571⟩. ⟨hal-02999581⟩