Evaluation of HWVP feed preparation chemistry for an NCAW simulant -- Fiscal Year 1991: Evaluation of offgas generation, reductant requirements and thermal stability: Technical report

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Description

The Hanford Waste Vitrification Plant (HWVP) is being designed for the Department of Energy to immobilize pretreated radioactive high-level waste and transuranic waste as glass for permanent disposal. Laboratory studies were conducted to characterize HWVP slurry chemistry during selected processing steps, using pretreated Neutralized Current Acid Waste (NCAW) simulant. Laboratory tests were designed to provide bases for determining the potential for hazardous gas generation, making chemical adjustments for glass redox control, and assessing the potential for rapid exothermic reactions of dried NCAW slurry. Offgas generation rates and the total moles of gas released as a function of selected pretreated NCAW ... continued below

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201 p.

Creation Information

Wiemers, K.D.; Langowski, M.H.; Powell, M.R. & Larson, D.E. March 1, 1996.

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  • Pacific Northwest Laboratory
    Publisher Info: Pacific Northwest Lab., Richland, WA (United States)
    Place of Publication: Richland, Washington

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Description

The Hanford Waste Vitrification Plant (HWVP) is being designed for the Department of Energy to immobilize pretreated radioactive high-level waste and transuranic waste as glass for permanent disposal. Laboratory studies were conducted to characterize HWVP slurry chemistry during selected processing steps, using pretreated Neutralized Current Acid Waste (NCAW) simulant. Laboratory tests were designed to provide bases for determining the potential for hazardous gas generation, making chemical adjustments for glass redox control, and assessing the potential for rapid exothermic reactions of dried NCAW slurry. Offgas generation rates and the total moles of gas released as a function of selected pretreated NCAW components and process variables were measured. An emphasis was placed on identifying conditions that initiate significant H{sub 2} generation. Glass redox measurements, using Fe{sup +2}/{Sigma}Fe as an indicator of the glass oxidation state, were made to develop guidelines for HCOOH addition. Thermal analyses of dried NCAW simulant were conducted to assess the potential of a rapid uncontrollable exothermic reaction in the chemical processing cell tanks.

Physical Description

201 p.

Notes

INIS; OSTI as DE96008181

Source

  • Other Information: PBD: Mar 1996

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  • Other: DE96008181
  • Report No.: PNNL--11029
  • Grant Number: AC06-76RL01830
  • DOI: 10.2172/212717 | External Link
  • Office of Scientific & Technical Information Report Number: 212717
  • Archival Resource Key: ark:/67531/metadc667831

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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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  • March 1, 1996

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • April 7, 2016, 2:39 p.m.

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Wiemers, K.D.; Langowski, M.H.; Powell, M.R. & Larson, D.E. Evaluation of HWVP feed preparation chemistry for an NCAW simulant -- Fiscal Year 1991: Evaluation of offgas generation, reductant requirements and thermal stability: Technical report, report, March 1, 1996; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc667831/: accessed August 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.