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Immobilization of Sodium‐Bearing High‐Level Radioactive Waste in Synroc Containing Na 2 Al 2 Ti 6 O 16 ‐Type Freudenbergite
Author(s) -
Li Liyu,
Luo Shanggeng,
Wang Dexi
Publication year - 1998
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1998.tb02570.x
Subject(s) - high level waste , sodium , radioactive waste , nuclear chemistry , materials science , oxide , radiochemistry , chemistry , metallurgy
Because sodium has a tendency to form less‐durable phases during the fabrication of synroc, it is very difficult to immobilize. This study shows that synroc that contains Na 2 Al 2 Ti 6 O 16 ‐type freudenbergite can be used to incorporate sodium‐bearing high‐level radioactive waste. Synroc samples that contain 5.0 wt% Na 2 O (11.5 wt% waste oxide, accordingly) exhibit very good chemical durability and physical properties. The standard Synroc‐C formulation can incorporate only 2 wt% Na 2 O. Therefore, this study greatly improves the immobilization ability of sodium in synroc.