STATISTICAL REVIEW OF CESIUM CARBONATE FUSION MEASUREMENTS OF ARCHIVED GLASS SAMPLES FROM THE DWPF PROCESS

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This technical report provides a statistical review of measurements that the Defense Waste Processing Facility (DWPF) Laboratory (Lab) generated by Inductively-Coupled Plasma--Atomic Emission Spectroscopy (ICP-AES) for samples of archived Slurry Mix Evaporator (SME) glass that were prepared using a cesium carbonate (Cs{sub 2}CO{sub 3}) fusion dissolution method. Measurements were generated by both of the Lab's ICPs, which are designated as M-13 and M-14. Comparisons between the two ICPs suggest that for the ARG-1 measurements the M-14 provided lower (on average) concentration measurements for about 13 of the 16 elements reported by DWPF with Cr, Mn, Ni, and Zr being statistically ... continued below

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Edwards, T July 31, 2006.

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This technical report provides a statistical review of measurements that the Defense Waste Processing Facility (DWPF) Laboratory (Lab) generated by Inductively-Coupled Plasma--Atomic Emission Spectroscopy (ICP-AES) for samples of archived Slurry Mix Evaporator (SME) glass that were prepared using a cesium carbonate (Cs{sub 2}CO{sub 3}) fusion dissolution method. Measurements were generated by both of the Lab's ICPs, which are designated as M-13 and M-14. Comparisons between the two ICPs suggest that for the ARG-1 measurements the M-14 provided lower (on average) concentration measurements for about 13 of the 16 elements reported by DWPF with Cr, Mn, Ni, and Zr being statistically lower (at a 5% significance level) for the ARG-1 samples. One of the three exceptions is Li, for which the M-14 yielded (on average) higher concentration measurements than the M-13. For the SME samples, the M-14 and M-13 measurements had statistically different (at the 5% significance level) means for B, Ca, Cr, Cu, Fe, Li, Mg, Mn, Na, Ni, Si, Ti, U, and Zr with the M-14 being lower than the M-13 for all of these elements except for Li. For the screened SME samples, statistically significant (at the 5% level) differences between the means of the Cs{sub 2}CO{sub 3} and prototypic preparations are seen for Ca (Cs{sub 2}CO{sub 3} higher for both ICPs), Cr (Cs{sub 2}CO{sub 3} higher for both ICPs), Cu (Cs{sub 2}CO{sub 3} higher for M-13), K (Cs{sub 2}CO{sub 3} higher for M-13), Mn (Cs{sub 2}CO{sub 3} lower for M-14), Ni (Cs{sub 2}CO{sub 3} lower for M-14), Si (Cs{sub 2}CO{sub 3} lower for M-14), Ti (Cs{sub 2}CO{sub 3} higher for M-13), U (Cs{sub 2}CO{sub 3} higher for both ICPs), and Zr (Cs{sub 2}CO{sub 3} lower for M-14). The Cs{sub 2}CO{sub 3} fusion method provided elemental of glass samples made from SME batches that were statistically comparable to the DWPF prototypic dissolution methods when the Cs{sub 2}CO{sub 3} solutions were analyzed by the M-13. However, when the same solutions were analyzed with the M-15, the elemental analyses from the Cs{sub 2}CO{sub 3} method were slightly lower and more prone to fail the 95% sum of oxides criterion imposed by DWPF's Product Composition Control System (PCCS). The Cs{sub 2}CO{sub 3} fusion method dissolutions also provided slightly lower waste loading values than the prototypic dissolutions because of slightly higher lithium values when the M-14 was used. In essence, subtle differences in the analyses form the M-13 and M-14 ICPs make it difficult to assess the viability of the Cs{sub 2}CO{sub 3} fusion method to replace the prototypic dissolution methods. The DWFP Laboratory should investigate the causes of these subtle differences between the M-13 and M-14 ICPs as the effort to employ the Cs{sub 2}CO{sub 3} fusion method for SME elemental analyses continues.

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  • Report No.: WSRC-STI-2006-00069
  • Grant Number: DE-AC09-96SR18500
  • DOI: 10.2172/891683 | External Link
  • Office of Scientific & Technical Information Report Number: 891683
  • Archival Resource Key: ark:/67531/metadc882722

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  • July 31, 2006

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  • Sept. 21, 2016, 2:29 a.m.

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  • Nov. 2, 2016, 3:59 p.m.

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Edwards, T. STATISTICAL REVIEW OF CESIUM CARBONATE FUSION MEASUREMENTS OF ARCHIVED GLASS SAMPLES FROM THE DWPF PROCESS, report, July 31, 2006; [Aiken, South Carolina]. (digital.library.unt.edu/ark:/67531/metadc882722/: accessed September 26, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.