Examining the role of canister cooling conditions on the formation of nepheline from nuclear waste glasses

Christian, J. H.¹ 

[1] Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

关键词: nepheline;    canister centerline cooled;    waste canister;    high level waste;    vitrification;    crystallization;    differential thermal analysis;   

DOI  :  10.2172/1215487
RP-ID  :  SRNL-STI--2015-00429
PID  :  OSTI ID: 1215487

美国|英语

来源: SciTech Connect

【 摘 要 】

Nepheline (NaAlSiO???) crystals can form during slow cooling of high-level waste (HLW) glass after it has been poured into a waste canister. Formation of these crystals can adversely affect the chemical durability of the glass. The tendency for nepheline crystallization to form in a HLW glass increases with increasing concentrations of Al???O??? and Na???O.