Identification of secondary phases formed during unsaturated reaction of UO{sub 2} with EJ-13 water

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A set of experiments, wherein UO{sub 2} has been contacted by dripping water, has been conducted over a period of 182.5 weeks. The experiments are being conducted to develop procedures to study spent fuel reaction under unsaturated conditions that are expected to exist over the lifetime of the proposed Yucca Mountain repository site. One half of the experiments have been terminated, while one half are ongoing. Analyses of solutions that have dripped from the reacted UO{sub 2} have been performed for all experiments, while the reacted UO{sub 2} surfaces have been examined for the terminated experiments. A pulse of uranium ... continued below

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7 p.

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Bates, J.K.; Tani, B.S. & Veleckis, E. November 1, 1989.

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A set of experiments, wherein UO{sub 2} has been contacted by dripping water, has been conducted over a period of 182.5 weeks. The experiments are being conducted to develop procedures to study spent fuel reaction under unsaturated conditions that are expected to exist over the lifetime of the proposed Yucca Mountain repository site. One half of the experiments have been terminated, while one half are ongoing. Analyses of solutions that have dripped from the reacted UO{sub 2} have been performed for all experiments, while the reacted UO{sub 2} surfaces have been examined for the terminated experiments. A pulse of uranium release from the UO{sub 2} solid, combined with the formation of schoepite on the surface of the UO{sub 2}, was observed between 39 and 96 weeks of reaction. Thereafter, the uranium release decreased and a second set of secondary phases was observed. The latter phases incorporated cations from the EJ-13 water and included boltwoodite, uranophane, sklodowskite, compreignacite, and schoepite. The experiments are continuing to monitor whether additional changes in solution chemistry or secondary phase formation occurs. 6 refs., 2 figs., 2 tabs.

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7 p.

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INIS; OSTI as DE90001908

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  • Materials Research Society fall meeting, Boston, MA (United States), 27 Nov - 2 Dec 1989

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  • Other: DE90001908
  • Report No.: CONF-891119--2
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 137545
  • Archival Resource Key: ark:/67531/metadc619305

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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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  • November 1, 1989

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  • June 16, 2015, 7:43 a.m.

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  • Dec. 14, 2015, 11:43 a.m.

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Bates, J.K.; Tani, B.S. & Veleckis, E. Identification of secondary phases formed during unsaturated reaction of UO{sub 2} with EJ-13 water, article, November 1, 1989; Illinois. (digital.library.unt.edu/ark:/67531/metadc619305/: accessed September 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.