Particularly if those casks contain HLW stabilised as Synroc[1]. Synroc, unlike glass wasteforms, consists of mineral phases, the bulk composition is carefully

Particularly if those casks contain HLW stabilised as Synroc[1]. Synroc, unlike glass wasteforms, consists of mineral phases, the bulk composition is carefully chosen such that the mineral assemblage provides each nuclide with an energetically favorable crystallographic site. [1] https://en.wikipedia.org/wiki/Synroc https://en.wikipedia.org/wiki/Synroc