Characterization of U(VI)-phases in corroded cement products by micro(μ)-spectroscopic methods
Authors / Editors
Research Areas
No matching items found.
Publication Details
Output type: Journal article
Author list: Rothe J., Brendebach B., Bube C., Dardenne K., Denecke M., Kienzler B., Metz V., Prüßmann T., Rickers-Appel K., Schild D., Soballa E., Vitova T.
Publisher: IOP Publishing
Publication year: 2013
Journal: Journal of Physics: Conference Series (1742-6588)
Volume number: 430
Issue number: 1
eISBN: *****************
ISSN: 1742-6588
eISSN: 1742-6596
URL: http://api.elsevier.com/content/abstract/scopus_id:84877343913
Unpaywall Data
Open access status: gold
Full text URL: https://iopscience.iop.org/article/10.1088/1742-6596/430/1/012114/pdf
Abstract
Cementation is an industrial scale conditioning method applied to fix and solidify liquid low and intermediate level radioactive wastes (LLW/ILW) prior to underground disposal in geological formations.To assist prognosis of the long-term safety of cemented waste, alteration of uranium doped cement productswas studied in chloride-rich solutions relevant for final LLW/ILW disposal in rock salt. After long-time exposure of the full-scale LLW/ILW simulates to concentrated NaCl and MgCl brines, solid samples were retrieved for chemical and mineralogical analysis with an emphasis on uranium speciation in the corroded cement matrix.Bulk and recent spatially resolved micro(μ) U L3-XAFS measurements point to the occurrence of a diuranate type U(VI) phase forming throughout the corroded cement monoliths. U-enriched hot spots with dimensions up to several tens of μm turn out to be generally X-ray amorphous.
Keywords
No matching items found.
Documents
No matching items found.
