Short-term consistency testing vs. long-term behavior

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The authors conducted Product Consistency Tests (PCTs) with a surrogate low-activity waste (LAW) glass to (1) evaluate the possible use of various test conditions in a specification test for LAW waste forms, (2) measure the reproducibility of the test at low temperatures, and (3) determine if the rates calculated from 7-day PCTs bound the rates measured in PCT conducted for longer durations, which represent more advanced corrosion. The effects of temperature and pH on the dissolution rate in PCTs are much less than the effects observed in dilute solutions due to the buildup of dissolved glass components in the PCTs. ... continued below

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13 p.

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Ebert, W.L.; Bakel, A.J.; Wolf, S.F. & Strachan, D.M. July 1, 1997.

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Description

The authors conducted Product Consistency Tests (PCTs) with a surrogate low-activity waste (LAW) glass to (1) evaluate the possible use of various test conditions in a specification test for LAW waste forms, (2) measure the reproducibility of the test at low temperatures, and (3) determine if the rates calculated from 7-day PCTs bound the rates measured in PCT conducted for longer durations, which represent more advanced corrosion. The effects of temperature and pH on the dissolution rate in PCTs are much less than the effects observed in dilute solutions due to the buildup of dissolved glass components in the PCTs. The precision of replicate 7-day tests at 20 and 40{degrees}C was limited by the analytical uncertainty. The dissolution rates at all temperatures decreased with the test duration initially. However, the dissolution rates in tests at 70 and 90{degrees}C increased when certain alteration phases formed after about 100 and 500 days, respectively; the rates in some tests exceeded that measured in a 7-day PCT. While the 7-day PCT does not provide a bounding rate for this glass at 70 or 90{degrees}C, tests for longer durations are needed to determine if a 7-day test provides a bounding rate at lower temperatures.

Physical Description

13 p.

Notes

INIS; OSTI as DE97007068

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  • 18. annual DOE low-level radioactive waste management conference, Salt Lake City, UT (United States), 20-22 May 1997

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  • Other: DE97007068
  • Report No.: ANL/CMT/CP--92648
  • Report No.: CONF-970537--8
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 505722
  • Archival Resource Key: ark:/67531/metadc698231

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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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  • July 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • June 14, 2016, 7:39 p.m.

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Ebert, W.L.; Bakel, A.J.; Wolf, S.F. & Strachan, D.M. Short-term consistency testing vs. long-term behavior, article, July 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc698231/: accessed November 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.