Dissolution of plutonium metal in sulfamic acid at elevated temperatures

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The kinetics of the dissolution of plutonium metal in sulfamic acid at varying temperatures was determined. Hydrogen off-gas rates and plutonium concentrations were determined as functions of time for different dissolving conditions. Nominal 2.2 kg Pu buttons (surface area, 171 cm/sup 2/) should yield solutions containing 190 to 260 g Pu/L and 3.3M sulfamate ion after a one-hour dissolving time at 70/sup 0/C. Hydrogen off-gas rates were calculated to vary from a high of 2.7L of gaseous hydrogen per minute (STP) at the beginning of a dissolving cycle to 50 mL of hydrogen gas per minute at the end of ... continued below

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Pages: 28

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Gray, L.W. February 1, 1979.

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Description

The kinetics of the dissolution of plutonium metal in sulfamic acid at varying temperatures was determined. Hydrogen off-gas rates and plutonium concentrations were determined as functions of time for different dissolving conditions. Nominal 2.2 kg Pu buttons (surface area, 171 cm/sup 2/) should yield solutions containing 190 to 260 g Pu/L and 3.3M sulfamate ion after a one-hour dissolving time at 70/sup 0/C. Hydrogen off-gas rates were calculated to vary from a high of 2.7L of gaseous hydrogen per minute (STP) at the beginning of a dissolving cycle to 50 mL of hydrogen gas per minute at the end of a one-hour dissolving time. Sludge formation, which is a problem at ambient temperatures, does not occur at dissolving temperatures of 60 to 80/sup 0/C. Dissolution curves suggest that the mechanism of dissolution changes at about 50 to 55/sup 0/C. Below this temperature, a surface coating of plutonium hydride may form; above this temperature, plutonium metal appears to be converted directly to Pu/sup 3 +/. 13 figures, 1 table.

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Pages: 28

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Dep. NTIS, PC A03/MF A01.

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  • Report No.: DP-1515
  • Grant Number: EY-76-C-09-0001
  • DOI: 10.2172/6375065 | External Link
  • Office of Scientific & Technical Information Report Number: 6375065
  • Archival Resource Key: ark:/67531/metadc1204398

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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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  • February 1, 1979

Added to The UNT Digital Library

  • July 5, 2018, 11:11 p.m.

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  • Oct. 18, 2018, 4:58 p.m.

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Gray, L.W. Dissolution of plutonium metal in sulfamic acid at elevated temperatures, report, February 1, 1979; United States. (digital.library.unt.edu/ark:/67531/metadc1204398/: accessed November 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.