Abstract
The reprocessing of nuclear fuel generates gaseous radionuclides including various isotopes of xenon, krypton and iodine. Iodine, mainly present as long-lived 129I (half-life, 1.57 × 107 years) and short-lived 131I (half-life, 8.02 days) is a particular concern because of its high volatility and mobility in the environment. Deep geological disposal is therefore favored over release into the marine environment or the atmosphere. To this end, gaseous iodine must first be captured in solid sorbents and then immobilized in a stable waste form. While the literature on iodine sorbents (also called filters) and iodine immobilization materials is extensive, the conversion of the sorbents into stable waste forms has not received as much attention. The aim of this review is to examine the links between these two research fields: iodine trapping on solid sorbents and iodine conditioning matrices described in the literature.
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