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Study of Processing Hllw by Super High Temperature Method. Part II*. Reducing Reactions and Formation of Complex Oxides in the Simplified Hllw

Published online by Cambridge University Press:  15 February 2011

Masayosi Uno ,
Youji Kadotani ,
Chie Miyake  and
Misato Horie
Masayosi Uno
Affiliation:
Department of Nuclear Engineering, Faculty of Engineering, Osaka University Yamadaoka 2-1, Suita, Osaka 565Japan
Youji Kadotani
Affiliation:
Department of Nuclear Engineering, Faculty of Engineering, Osaka University Yamadaoka 2-1, Suita, Osaka 565Japan
Chie Miyake
Affiliation:
Department of Nuclear Engineering, Faculty of Engineering, Osaka University Yamadaoka 2-1, Suita, Osaka 565Japan
Misato Horie
Affiliation:
PNC, Tokai-Mura, Ibaraki 319-11Japan
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Abstract

The reducing reactions of platinum metal oxides and the formation of the complex oxides were studied to estimate the process at high temperatures. Heat treatment of Re207 with TiN causes reduction up to the sublimation point of Re207 and exhibits the highest value of the recovery among the reducing agents used in the present study. Reducing reactions of the platinum metal oxides with the reducing agents lower the melting temperature. The simplified complex oxides contain the complex oxides of the representative elements of FP and the metallic elements of the reducing agents, which contribute to a decrease of melting temperature, neodymium zirconium oxides and neodymium barium oxide which may transform to the other phases during heating. Uranium may dissolve in the phases in which uranium is identified by EPMA but cannot detected by X-ray diffraction.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 353: Symposium – Scientific Basis for Nuclear Waste Management XVIII , 1994 , 1339
Copyright
Copyright © Materials Research Society 1995

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References

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