Monitoring the consistency of multiphase waste forms.

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Methods are being developed for demonstrating that nonstandard high-level radioactive waste (HLW) forms meet the intent of the product consistency requirement in the Waste Acceptance System Requirements document (WASRD). That requirement was established for borosilicate HLW glasses ''to ensure a consistent glass product by controlling the vitrification process, consistency is necessary to reflect consideration for the waste package designs.'' [1] The test method specified in the WASRD for HLW glasses is the 7-day product consistency test (PCT). To meet the WASRD requirement, the response of an HLW glass in the PCT must be less than that of the environmental assessment ... continued below

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4 pages

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Ebert, W. L.; Lewis, M. A. & Johnson, S. G. June 25, 2001.

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Description

Methods are being developed for demonstrating that nonstandard high-level radioactive waste (HLW) forms meet the intent of the product consistency requirement in the Waste Acceptance System Requirements document (WASRD). That requirement was established for borosilicate HLW glasses ''to ensure a consistent glass product by controlling the vitrification process, consistency is necessary to reflect consideration for the waste package designs.'' [1] The test method specified in the WASRD for HLW glasses is the 7-day product consistency test (PCT). To meet the WASRD requirement, the response of an HLW glass in the PCT must be less than that of the environmental assessment (EA) glass. The EA glass is used as a benchmark ''so that conservative but realistic assessments of the engineered barrier system performance can be made.'' [1] The PCT and the WASRD requirement were developed to bound the behaviors of the wide range of borosilicate HLW glasses that will be produced at DOE facilities for the purpose of repository design. However, the need to demonstrate that the physical, chemical, and radiological properties of HLW forms have been constrained within acceptable (i.e., as-qualified) ranges will probably apply to all HLW waste forms. The PCT may not be the appropriate method for nonstandard HLW waste forms being developed for DOE waste streams that are not amenable to direct vitrification. For example, the multiphase ceramic waste form developed for excess weapons plutonium or for glass/ceramic waste forms that contain substantial amounts of included crystalline phases may require other methods for demonstrating consistency.

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4 pages

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  • ANS 2001 Winter Meeting, Reno, NV (US), 11/11/2001--11/15/2001

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  • Report No.: ANL/CMT/CP-105151
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 793061
  • Archival Resource Key: ark:/67531/metadc742581

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  • June 25, 2001

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  • Oct. 19, 2015, 7:39 p.m.

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  • March 29, 2016, 8:14 p.m.

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Ebert, W. L.; Lewis, M. A. & Johnson, S. G. Monitoring the consistency of multiphase waste forms., article, June 25, 2001; Illinois. (digital.library.unt.edu/ark:/67531/metadc742581/: accessed August 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.