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Melting Simulated High-Level Liquid Waste With Addition of TiN and AIN

Published online by Cambridge University Press:  10 February 2011

Masayoshi Uno ,
Hajime Kinoshita  and
Shinsuke Yamanaka
Masayoshi Uno
Affiliation:
Department of Nuclear Engineering, Osaka University, Yamada-oka 2-1, Suita, Osaka 565-0871JAPAN
Hajime Kinoshita
Affiliation:
Department of Nuclear Engineering, Osaka University, Yamada-oka 2-1, Suita, Osaka 565-0871JAPAN
Shinsuke Yamanaka
Affiliation:
Department of Nuclear Engineering, Osaka University, Yamada-oka 2-1, Suita, Osaka 565-0871JAPAN
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Abstract

Calcined simulated high level liquid waste (HLLW) with a desired amount of TiN and AIN mixture was heat-treated at 1673-1873 K. It was revealed that the mixture of TiN and AIN (the atomic ratio of Al to Ti is 1:9) caused the melting of the specimen at 1673 K and the separation of the elements into two groups: alloy phase and oxide phase. The analysis of the oxide phase showed that the compounds in it could be divided into four phases, and that all fission product elements formed the complex oxides with Ti and Al. It is considered that Al and Zr dissolution in each phase contribute to the melting of the oxide phase at 1673K. A 30-days Soxhlet leach test showed that the chemical durability of the oxide phase as a waste form was superior to that of glass waste form[l]

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 608: Symposium QQ – Scientific Basis for Nuclear Waste Management XXIII , 1999 , 449
Copyright
Copyright © Materials Research Society 2000

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References

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