Elemental Depth Profiling of Nuclear Waste Glasses after Two‐Years Burial in a Salt Geology
作者:
Alexander R. Lodding,
E. Urban Engström,
Bruce K. Zoitos,
David E. Clark,
George G. Wicks,
期刊:
Journal of the American Ceramic Society
(WILEY Available online 1992)
卷期:
Volume 75,
issue 10
页码: 2702-2706
ISSN:0002-7820
年代: 1992
DOI:10.1111/j.1151-2916.1992.tb05492.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
Detailed surface compositional analysis has been conducted on 12 simulated nuclear waste forms leached for two years in the brine environment of the Waste Isolation Pilot Plant (WIPP). Secondary ion mass spectrometry (SIMS) of both cations and anions has identified characteristic leaching and precipitation zones within the leached layers on all specimens. The thickness of the leached layers is found to range from approximately 0.3 to 2.7 μm and the total element loss from 80 to 625 mmol/m2, indicating that durability in brine differs by less than an order of magnitude between the different glasses. The in‐depth profiles of anionic elements indicate the significant roles of carbon, fluorine, and chlorine in the formation of surface phases. Also recorded and discussed are elemental SIMS images of sputter crater tapers, providing additional documentation of leaching subzon
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