Defense Waste Processing Facility (DWPF) Viscosity Model: Revisions for Processing High TiO2 Containing Glasses

Jantzen, C. M.¹  Edwards, T. B.¹ 

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

关键词: DWPF;    process control;    viscosity;    Salt Waste Processing Facility;    monosodium titanate;    crystalline silicon titanate;   

DOI  :  10.2172/1323882
RP-ID  :  SRNL-STI--2016-00115
PID  :  OSTI ID: 1323882

学科分类：核能源与工程

美国|英语

来源: SciTech Connect

【 摘 要 】

Radioactive high level waste (HLW) at the Savannah River Site (SRS) has successfully been vitrified into borosilicate glass in the Defense Waste Processing Facility (DWPF) since 1996. Vitrification requires stringent product/process (P/P) constraints since the glass cannot be reworked once it is poured into ten foot tall by two foot diameter canisters. A unique ???feed forward??? statistical process control (SPC) was developed for this control rather than statistical quality control (SQC). In SPC, the feed composition to the DWPF melter is controlled prior to vitrification. In SQC, the glass product would be sampled after it is vitrified. Individual glass property-composition models form the basis for the ???feed forward??? SPC. The models transform constraints on the melt and glass properties into constraints on the feed composition going to the melter in order to guarantee, at the 95% confidence level, that the feed will be processable and that the durability of the resulting waste form will be acceptable to a geologic repository.