Evaluation of the single-pass flow-through test to support a low-activity waste specification

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Description

A series of single-pass flow-through (SPFT) tests was performed on five reference low-activity waste glasses and a reference glass from the National Institute of Standards and Technology to support a product specification for low-activity waste (LAW) forms. The results showed that the SPFT test provides a means to quantitatively distinguish among LAW glass forms in terms of their forward reaction rate at a given temperature and solution pH. Two of the test glasses were also subjected to SPFT testing at Argonne National Laboratory (ANL). Forward reaction rate constants calculated from the ANL test data were 100 to over 1,000 times ... continued below

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40 p.

Creation Information

McGrail, B.P. & Peeler, D.K. September 1, 1995.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

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Authors

  • McGrail, B.P. Pacific Northwest Lab., Richland, WA (United States)
  • Peeler, D.K. Westinghouse Savannah River Co., Aiken, SC (United States)

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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

A series of single-pass flow-through (SPFT) tests was performed on five reference low-activity waste glasses and a reference glass from the National Institute of Standards and Technology to support a product specification for low-activity waste (LAW) forms. The results showed that the SPFT test provides a means to quantitatively distinguish among LAW glass forms in terms of their forward reaction rate at a given temperature and solution pH. Two of the test glasses were also subjected to SPFT testing at Argonne National Laboratory (ANL). Forward reaction rate constants calculated from the ANL test data were 100 to over 1,000 times larger than the values obtained from the SPFT tests conducted at PNL. An analysis of the ANL results showed that they were inconsistent with independent measurements done on glasses of similar composition, the known pH-dependence of the forward rate, and with the results from low surface-area-to-volume, short duration product consistency tests. Because the data set obtained from the SPFT tests done at PNL was consistent with each of these same factors, a detailed examination of the test procedures used at both laboratories was performed to determine the cause(s) of the discrepancy. The omission of background subtraction in the data analysis procedure and the short-duration (on the order of hours) of the ANL tests are factors that may have significantly affected the calculated rates.

Physical Description

40 p.

Notes

INIS; OSTI as DE96000197

Source

  • Other Information: PBD: Sep 1995

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Identifier

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  • Other: DE96000197
  • Report No.: PNL--10746
  • Grant Number: AC06-76RL01830
  • DOI: 10.2172/106527 | External Link
  • Office of Scientific & Technical Information Report Number: 106527
  • Archival Resource Key: ark:/67531/metadc619888

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Creation Date

  • September 1, 1995

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

Description Last Updated

  • April 7, 2016, 2:39 p.m.

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McGrail, B.P. & Peeler, D.K. Evaluation of the single-pass flow-through test to support a low-activity waste specification, report, September 1, 1995; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc619888/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.