29 October 2017 to 3 November 2017
Australia/Sydney timezone

Chemical Durability of Borosilicate Glass-Ceramic High-Level Waste Form in Dilute and Static Conditions

31 Oct 2017, 11:45
Oral Presentation National and international collaborative waste management programs Glass Wasteforms


Mr Jarrod Crum (PNNL)


A borosilicate glass-ceramic waste form is being developed to significantly increase waste loading of high-level waste relative to single phase glass. The glass-ceramic waste form is comprised of approximately 70% borosilicate glass, 20% oxyapatite (X2Ln8Si6O26), and 10% powellite (XMoO4), by mass, where X = alkaline earth and Ln = lanthanides. Understanding the overall corrosion behavior of the glass-ceramic is complicated because each phase corrodes at a different rate and there are matrix effects. Durability of the multiphase waste form was investigated with single-pass flow-through and static leach testing, but the results were convoluted because elements were present in multiple phases. In an effort to deconvolute the corrosion process of the full waste form, additional corrosion testing was performed on the full waste form and individually-synthesized phases (remainder glass, oxyapatite, and powellite). Results of these tests are presented and comparisons between the glass-ceramic waste form and individual phases are discussed.

Primary author

Mr Jarrod Crum (PNNL)


Mr Brian Riley (PNNL) Mr Jacob Peterson (PNNL) James Neeway (Pacific Northwest National Laboratory) Mr Jared Kroll (PNNL) Dr Matthew Asmussen (PNNL)

Presentation Materials

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