The corrosion behavior of two glasses (alkali-tin-silicate and lanthanide borosilicate) developed for the immobilization of plutonium are examined. The durability of these glasses and the disposition of Pu during corrosion are discussed and compared. Test results are presented from various static test methods, including product consistency tests and ANL vapor hydration tests. The extent of corrosion of the Pu-bearing glasses was characterized by both solution (for glass component dissolution) and solid phase analyses (for glass reaction and the formation of alteration phases). Insight gained from testing the Pu glasses is utilized to evaluate the corrosion behavior under potential repository disposal conditions.
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