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Development and Testing of a New Porous Crystalline Matrix (Gubka) for Stabilizing Actinide Solutions

Published online by Cambridge University Press:  10 February 2011

Albert S. Aloy ,
A. G. Anshits ,
A. A. Tretyakov ,
D. A. Knecht ,
T. J. Tranter  and
Y. Macheret
Albert S. Aloy
Affiliation:
V. G. Khlopin Radium Institute, 2-nd Murinskiy Ave., St. Petersburg, 194021, Russia
A. G. Anshits
Affiliation:
Krasnoyarsk Scientific Center of Siberian Branch of Russian Academy of Sciences (KSC RAS), 42 K. Marx St., Krasnoyarsk 660049, Russia
A. A. Tretyakov
Affiliation:
Federal State Unitary Enterprise “Mining and Chemical Combine” (FSUE MCh C), 53 Lenin St., Zheleznogorsk, Krasnoyarsk Region, 660033, Russia
D. A. Knecht
Affiliation:
Idaho National Engineering and Environmental Laboratory, P. O. Box 1625, Idaho Falls, ID 83415
T. J. Tranter
Affiliation:
Idaho National Engineering and Environmental Laboratory, P. O. Box 1625, Idaho Falls, ID 83415
Y. Macheret
Affiliation:
Idaho National Engineering and Environmental Laboratory, P. O. Box 1625, Idaho Falls, ID 83415
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Abstract

This paper describes the results of a joint research program of the Russian institutes at St. Petersburg, Krasnoyarsk and Zheleznogorsk with the Idaho National Engineering and Environmental Laboratory. A new “Gubka” (“sponge” in Russian) material was used to sorb and stabilize surrogate problematic actinide solutions, which contained lanthanide mixtures in nitric acid and tracer americium–241, by using repeated saturation-drying-calcining cycles. These tests resulted in maximum loading up to about 45 wt.% nitrate salts after drying and 33 wt.% oxides after calcination. The rates of americium–241 recovery were measured in 6 M nitric acid at 60°C. Gubka samples loaded with cerium and neodymium oxides were hot pressed at 29 MPa and 20-1000°C, resulting in a 35 % volume reduction.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 608: Symposium QQ – Scientific Basis for Nuclear Waste Management XXIII , 1999 , 637
Copyright
Copyright © Materials Research Society 2000

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References

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