Silver iodide sodalite for 129I immobilisation

Vance, ER; Gregg, DJ; Grant, C; Stopic, A; Maddrell, ER

Silver iodide sodalite for 129I immobilisation

Date

2016-11-01

Authors

Publisher

Elsevier B.V.

Abstract

Silver iodide sodalite was initially synthesised as a fine-grained major phase in a nominally stoichiometric composition following hot isostatic pressing at 850 °C with 100 MPa and its composition, Ag4Al3Si3O12I, was approximately verified by scanning electron microscopy. An alternative preparative method yielded a more dense and stoichiometric AgI sodalite on sintering and HIPing. As found for AgI, the I is released from AgI sodalite much more readily in reducing water than in ordinary water. Thus in normal PCT-B tests, the I release was <0.3 g/L in water, but it was ∼70 g/L under highly reducing conditions. This is an important point with regard to can material if HIPing is used for consolidation. © 2016 Elsevier B.V.

Keywords

Scanning electron microscopy, Hot pressing, Silver iodides, Sintering, Water, Iodine 129

Citation

Vance, E. R., Gregg, D. J., Grant, C., Stopic, A., & Maddrell, E. R. (2016). Silver iodide sodalite for 129I immobilisation. Journal of Nuclear Materials, 480, 177-181. doi:10.1016/j.jnucmat.2016.08.013