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Title: Dilute condition corrosion behavior of glass-ceramic waste form

Borosilicate glass-ceramics are being developed to immobilize high-level waste generated by aqueous reprocessing into a stable waste form. The corrosion behavior of this multiphase waste form is expected to be complicated by multiple phases and crystal-glass interfaces. A modified single-pass flow-through test was performed on polished monolithic coupons at a neutral pH (25 °C) and 90 °C for 33 d. The measured glass corrosion rates by micro analysis in the samples ranged from 0.019 to 0.29 g m -2 d -1 at a flow rate per surface area = 1.73 × 10 -6 m s -1. The crystal phases (oxyapatite and Ca-rich powellite) corroded below quantifiable rates, by micro analysis. While, Ba-rich powellite corroded considerably in O10 sample. The corrosion rates of C1 and its replicate C20 were elevated an order of magnitude by mechanical stresses at crystal-glass interface caused by thermal expansion mismatch during cooling and unique morphology (oxyapatite clustering).
Authors:
 [1] ; ORCiD logo [1] ;  [1] ;  [1] ;  [1] ;  [2]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Grant/Contract Number:
AC0576RL01830
Type:
Published Article
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 482; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
OSTI Identifier:
1380038
Alternate Identifier(s):
OSTI ID: 1335865

Crum, Jarrod V., Neeway, James J., Riley, Brian J., Zhu, Zihua, Olszta, Matthew J., and Tang, Ming. Dilute condition corrosion behavior of glass-ceramic waste form. United States: N. p., Web. doi:10.1016/j.jnucmat.2016.08.002.
Crum, Jarrod V., Neeway, James J., Riley, Brian J., Zhu, Zihua, Olszta, Matthew J., & Tang, Ming. Dilute condition corrosion behavior of glass-ceramic waste form. United States. doi:10.1016/j.jnucmat.2016.08.002.
Crum, Jarrod V., Neeway, James J., Riley, Brian J., Zhu, Zihua, Olszta, Matthew J., and Tang, Ming. 2016. "Dilute condition corrosion behavior of glass-ceramic waste form". United States. doi:10.1016/j.jnucmat.2016.08.002.
@article{osti_1380038,
title = {Dilute condition corrosion behavior of glass-ceramic waste form},
author = {Crum, Jarrod V. and Neeway, James J. and Riley, Brian J. and Zhu, Zihua and Olszta, Matthew J. and Tang, Ming},
abstractNote = {Borosilicate glass-ceramics are being developed to immobilize high-level waste generated by aqueous reprocessing into a stable waste form. The corrosion behavior of this multiphase waste form is expected to be complicated by multiple phases and crystal-glass interfaces. A modified single-pass flow-through test was performed on polished monolithic coupons at a neutral pH (25 °C) and 90 °C for 33 d. The measured glass corrosion rates by micro analysis in the samples ranged from 0.019 to 0.29 g m-2 d-1 at a flow rate per surface area = 1.73 × 10-6 m s-1. The crystal phases (oxyapatite and Ca-rich powellite) corroded below quantifiable rates, by micro analysis. While, Ba-rich powellite corroded considerably in O10 sample. The corrosion rates of C1 and its replicate C20 were elevated an order of magnitude by mechanical stresses at crystal-glass interface caused by thermal expansion mismatch during cooling and unique morphology (oxyapatite clustering).},
doi = {10.1016/j.jnucmat.2016.08.002},
journal = {Journal of Nuclear Materials},
number = C,
volume = 482,
place = {United States},
year = {2016},
month = {8}
}