Chemical composition analysis and product consistency tests to support enhanced Hanford waste glass models. Results for the third set of high alumina outer layer matrix glasses

[摘要] In this report, the Savannah River National Laboratory provides chemical analyses and Product Consistency Test (PCT) results for 14 simulated high level waste glasses fabricated by the Pacific Northwest National Laboratory. The results of these analyses will be used as part of efforts to revise or extend the validation regions of the current Hanford Waste Treatment and Immobilization Plant glass property models to cover a broader span of waste compositions. The measured chemical composition data are reported and compared with the targeted values for each component for each glass. All of the measured sums of oxides for the study glasses fell within the interval of 96.9 to 100.8 wt %, indicating recovery of all components. Comparisons of the targeted and measured chemical compositions showed that the measured values for the glasses met the targeted concentrations within 10% for those components present at more than 5 wt %. The PCT results were normalized to both the targeted and measured compositions of the study glasses. Several of the glasses exhibited increases in normalized concentrations (NCi) after the canister centerline cooled (CCC) heat treatment. Five of the glasses, after the CCC heat treatment, had NC_B values that exceeded that of the Environmental Assessment (EA) benchmark glass. These results can be combined with additional characterization, including X-ray diffraction, to determine the cause of the higher release rates.

[发布日期] 2015-12-01

[学科分类] 核能源与工程

[关键词] MATRIX MATERIALS;HIGH-LEVEL RADIOACTIVE WASTES;ALUMINIUM OXIDES;GLASS;MATERIALS RECOVERY;CHEMICAL COMPOSITION;COMPARATIVE EVALUATIONS;CONCENTRATION RATIO;SAVANNAH RIVER PLANT;HEAT TREATMENTS;ABUNDANCE;COST;CHEMICAL ANALYSIS;BENCHMARKS;SIMULATION