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Title: Corrosion of the International Simple Glass under acidic to hyperalkaline conditions

Abstract

Assessment of glass dissolution kinetics, under disposal relevant temperature and pH environments, is required to credibly estimate radionuclide release rates from vitrified radioactive waste. Leaching of the International Simple Glass (ISG) under acidic to hyperalkaline conditions was examined. Forward rate measurements have been obtained using the dynamic leaching SPFT protocol and rate parameters for B, Na and Si in the basic regime; errors in rates predicted using these parameters at high pH and temperature are significant because the fitting uses logarithmic data. Longer term behaviour under hyperalkaline conditions, representative of some disposal environments, was investigated using the PCT and MCC-1 static leaching protocols with Ca(OH) 2 solutions for up to 120 days (PCT) and 720 days (MCC-1). In hyperalkaline conditions dissolution was incongruent for all elements and the presence of alternating zirconia-rich and zirconia-poor alteration layers was viewed on all leached monoliths, indicating the occurrence of a self-organisation phenomenon during leaching.

Authors:
 [1];  [1]; ORCiD logo [2]; ORCiD logo [1];  [1]; ORCiD logo [1]
  1. Univ. of Sheffield (United Kingdom)
  2. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1513249
Report Number(s):
PNNL-SA-139241
Journal ID: ISSN 2397-2106
Grant/Contract Number:  
AC05-76RL01830
Resource Type:
Accepted Manuscript
Journal Name:
npj Materials Degradation
Additional Journal Information:
Journal Volume: 2; Journal Issue: 1; Journal ID: ISSN 2397-2106
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Backhouse, Daniel J., Fisher, Adam J., Neeway, James J., Corkhill, Claire L., Hyatt, Neil C., and Hand, Russell J. Corrosion of the International Simple Glass under acidic to hyperalkaline conditions. United States: N. p., 2018. Web. doi:10.1038/s41529-018-0050-5.
Backhouse, Daniel J., Fisher, Adam J., Neeway, James J., Corkhill, Claire L., Hyatt, Neil C., & Hand, Russell J. Corrosion of the International Simple Glass under acidic to hyperalkaline conditions. United States. doi:10.1038/s41529-018-0050-5.
Backhouse, Daniel J., Fisher, Adam J., Neeway, James J., Corkhill, Claire L., Hyatt, Neil C., and Hand, Russell J. Mon . "Corrosion of the International Simple Glass under acidic to hyperalkaline conditions". United States. doi:10.1038/s41529-018-0050-5. https://www.osti.gov/servlets/purl/1513249.
@article{osti_1513249,
title = {Corrosion of the International Simple Glass under acidic to hyperalkaline conditions},
author = {Backhouse, Daniel J. and Fisher, Adam J. and Neeway, James J. and Corkhill, Claire L. and Hyatt, Neil C. and Hand, Russell J.},
abstractNote = {Assessment of glass dissolution kinetics, under disposal relevant temperature and pH environments, is required to credibly estimate radionuclide release rates from vitrified radioactive waste. Leaching of the International Simple Glass (ISG) under acidic to hyperalkaline conditions was examined. Forward rate measurements have been obtained using the dynamic leaching SPFT protocol and rate parameters for B, Na and Si in the basic regime; errors in rates predicted using these parameters at high pH and temperature are significant because the fitting uses logarithmic data. Longer term behaviour under hyperalkaline conditions, representative of some disposal environments, was investigated using the PCT and MCC-1 static leaching protocols with Ca(OH)2 solutions for up to 120 days (PCT) and 720 days (MCC-1). In hyperalkaline conditions dissolution was incongruent for all elements and the presence of alternating zirconia-rich and zirconia-poor alteration layers was viewed on all leached monoliths, indicating the occurrence of a self-organisation phenomenon during leaching.},
doi = {10.1038/s41529-018-0050-5},
journal = {npj Materials Degradation},
number = 1,
volume = 2,
place = {United States},
year = {2018},
month = {9}
}

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