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Verification and standardization of redox measurement for DWPF: Summary

Technical Report ·
DOI:https://doi.org/10.2172/6202257· OSTI ID:6202257

The colorimetric procedure for DWPF glass redox measurement developed by Baumann was verified by analyzing a series of reduced glasses using multiple techniques. The glasses were analyzed by (1) SRL-ADD using the colorimetric procedure, (2) SRL using Mossbauer spectroscopy, (3) Corning Glass Works (CGW) using the colorimetric procedure, and (4) CGW using a titration procedure. The results of the interlaboratory redox measurements indicated that the results of the colorimetric procedure were reproducible at SRL and CGW, the Fe/sup 2 +//Fe/sup 3 +/ redox ratios correlated poorly, the Fe/sup 2 +//..sigma..Fe redox ratios correlated well, and the Fe/sup 2 +//..sigma..Fe ratio can potentially be used to standardize the DWPF redox measurement. It is recommended that the DWPF redox measurement be based on the Fe/sup 2 +//..sigma..Fe ratio rather than on the Fe/sup 2 +//Fe/sup 3 +/ ratio. The acceptable DWPF redox range based on the Fe/sup 2 +//..sigma..Fe is 0.09--0.33 rather than the range of 0.1--0.5 based on the Fe/sup 2 +//Fe/sup 3 +/ ratio. 30 refs., 9 figs., 3 tabs.

Research Organization:
Savannah River Lab., Aiken, SC (USA)
DOE Contract Number:
AC09-76SR00001
OSTI ID:
6202257
Report Number(s):
DPST-89-222; ON: DE89010413
Country of Publication:
United States
Language:
English

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