Simulated Hanford waste: a study of physical properties, gas retention, and gas generation

S. A. Bryan, R. D. Scheele, L. R. Pederson, S. R. Adami

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    This study helps to establish the physical and chemical processes responsible for the generation and retention of gases within high-level waste contained in Tank 101-SY on the Hanford Site. Conducted on a laboratory scale with simulated waste, this research supports the development of mitigation/remediation strategies for Tank 101-SY. The simulated waste formulations used here are based on the composition of actual waste. Selected physical properties of the simulated waste are compared to properties of actual Tank 101-SY waste samples. There is a close correlation between the simulated waste and the actual waste from the convective slurry layer in Tank 101-SY. Gas retention in the simulated waste occurs by bubble attachment to solid particles. This attachment phenomenon is related to the organic constituents (HEDTA, EDTA, and citrate) in the simulated waste. A mechanism is discussed that relates the gas bubble/particle interactions to the partially hydrophobic surface produced on the solids by the organic constituents. Laboratory studies using aged simulated waste show that significant gas generation occurs thermally at current tank temperatures (approx.60°C). Gas compositions include those gases produced in actual tank waste, primarily N2, N2O, and H2. Gas stoichiometries are greatly influenced by several organic and inorganic constituents within the simulated waste.

    Original languageEnglish
    Title of host publicationHigh Level Radioactive Waste Management
    PublisherPubl by ASCE
    Pages1348-1354
    Number of pages7
    ISBN (Print)0872629503
    Publication statusPublished - 1 Jan 1993
    EventProceedings of the 4th Annual International Conference on High Level Radioactive Waste Management - Las Vegas, NV, USA
    Duration: 26 Apr 199330 Apr 1993

    Publication series

    NameHigh Level Radioactive Waste Management

    Other

    OtherProceedings of the 4th Annual International Conference on High Level Radioactive Waste Management
    CityLas Vegas, NV, USA
    Period26/4/9330/4/93

    ASJC Scopus subject areas

    • Engineering(all)

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  • Cite this

    Bryan, S. A., Scheele, R. D., Pederson, L. R., & Adami, S. R. (1993). Simulated Hanford waste: a study of physical properties, gas retention, and gas generation. In High Level Radioactive Waste Management (pp. 1348-1354). (High Level Radioactive Waste Management). Publ by ASCE.