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Investigation of Urtite as an Analog of Waste Slag from a Plasma Shaff Furnace

Published online by Cambridge University Press:  15 February 2011

S. A. Dmitriev  and
S. V. Stefanovsky
S. A. Dmitriev
Affiliation:
Sia “Radon”, 7 Rostovskii per. 2/14, 119121 Moscow, Russia.
S. V. Stefanovsky
Affiliation:
Sia “Radon”, 7 Rostovskii per. 2/14, 119121 Moscow, Russia.
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Abstract

Mineralogical-geochemical investigation of a sample of nepheline syenite (urtite) as a natural analog of final radioactive waste form has been performed. The specimen of urtite consists of nepheline, alkali feldspar, pyroxene, sphene, apatite and minor magnetite and amphibole. As a first approximation, urtite simulates the mineral composition of waste slag produced in a plasma shaft furnace at SIA “Radon”. Determination of chemical compositions of the minerals by electron-probe microanalysis has shown that the main phases that hosted radionuclides and their geochemical analogs are as follows: nepheline (Rb and probably Cs), feldspar (Ba), sphene (Zr, Nb, REE, and actinides) and apatite (Sr, REE, and actinides).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 412: Symposium V – Scientific Basis for Nuclear Waste Management XIX , 1995 , 239
Copyright
Copyright © Materials Research Society 1996

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References

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