Research Program to Investigate the Fundamental Chemistry of Technetium

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Research Progress and Implications Portions of two Tc glasses, LBNL-118 (Hanford AP-101 tank formulation) and LBNL-121 (higher organic content Hanford AN-107 tank formulation), were placed in vapor hydration test (VHT) stainless steel pressure vessels and exposed to a hydrous atmosphere at 238 C for 24.9 days. After being removed from the vessels, complete sample alteration is clearly visible for both samples. X-ray absorption spectra were then collected on these samples to characterize the Tc speciation within the alteration layers. The X-ray fluorescence signal was significantly improved for both VHT samples compared with that collected for the corresponding unaltered glasses, so ... continued below

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Pegg, Ian June 1, 2005.

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Research Progress and Implications Portions of two Tc glasses, LBNL-118 (Hanford AP-101 tank formulation) and LBNL-121 (higher organic content Hanford AN-107 tank formulation), were placed in vapor hydration test (VHT) stainless steel pressure vessels and exposed to a hydrous atmosphere at 238 C for 24.9 days. After being removed from the vessels, complete sample alteration is clearly visible for both samples. X-ray absorption spectra were then collected on these samples to characterize the Tc speciation within the alteration layers. The X-ray fluorescence signal was significantly improved for both VHT samples compared with that collected for the corresponding unaltered glasses, so much so that X ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) data could be collected for each VHT sample. This signal improvement for the VHT samples indicates that a significant amount of the Tc in the original glasses has migrated closer to the VHT sample surface; this surface enrichment results in a stronger Tc X ray signal than is the case for the more homogeneously distributed Tc in the original glasses.

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  • Report No.: EMSP-90163--2005
  • Grant Number: FG02-04ER63814
  • DOI: 10.2172/884865 | External Link
  • Office of Scientific & Technical Information Report Number: 884865
  • Archival Resource Key: ark:/67531/metadc876131

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • June 1, 2005

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 7, 2016, 8:32 p.m.

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Pegg, Ian. Research Program to Investigate the Fundamental Chemistry of Technetium, report, June 1, 2005; United States. (digital.library.unt.edu/ark:/67531/metadc876131/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.