Characterisation and radiolysis of modified lithium orthosilicate pebbles with noble metal impurities

A. Zariņš; O. Valtenbergs; G. Ķizāne; A. Supe; S. Tamulevičius; M. Andrulevičius; E. Pajuste; L. Baumane; O. Leys; M. H.H. Kolb; R. Knitter

doi:10.1016/j.fusengdes.2017.01.008

Characterisation and radiolysis of modified lithium orthosilicate pebbles with noble metal impurities

A. Zariņš^*
, O. Valtenbergs
, G. Ķizāne
, A. Supe
, S. Tamulevičius
, M. Andrulevičius
, E. Pajuste
, L. Baumane
, O. Leys
, M. H.H. Kolb
, R. Knitter

^*Corresponding author for this work

Daugavpils University
Kaunas University of Technology
Latvian Institute of Organic Synthesis
Karlsruhe Institute of Technology

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Modified lithium orthosilicate (Li₄SiO₄) pebbles with additions of titanium dioxide (TiO₂) are suggested as an alternative tritium breeding ceramic for the European solid breeder test blanket module. The noble metals – platinum (Pt), gold (Au) and rhodium (Rh), can be introduced into the modified Li₄SiO₄ pebbles during the melt-based process, due to the corrosion of Pt-Rh and Pt-Au alloy crucible components. In this study, the surface microstructure, chemical and phase composition of the modified Li₄SiO₄ pebbles with different contents of the noble metals was analysed. The influence of the noble metals on the radiolysis was evaluated after irradiation with accelerated electrons (E = 5 MeV), up to 12 MGy absorbed dose at 300–345 K in a dry argon atmosphere. Using electron spin resonance (ESR) spectroscopy, it was determined that the noble metals (up to 300 ppm) do not significantly influence the formation and accumulation of radiation-induced defects (RD) in the modified Li₄SiO₄ pebbles.

Original language	English
Pages (from-to)	934-939
Number of pages	6
Journal	Fusion Engineering and Design
Volume	124
DOIs	https://doi.org/10.1016/j.fusengdes.2017.01.008
Publication status	Published - Nov 2017

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This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Lithium orthosilicate
Noble metals
Radiolysis
Tritium breeding ceramic

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10.1016/j.fusengdes.2017.01.008

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@article{1ac4bdc4f33045c8bf5e548a643c9515,

title = "Characterisation and radiolysis of modified lithium orthosilicate pebbles with noble metal impurities",

abstract = "Modified lithium orthosilicate (Li4SiO4) pebbles with additions of titanium dioxide (TiO2) are suggested as an alternative tritium breeding ceramic for the European solid breeder test blanket module. The noble metals – platinum (Pt), gold (Au) and rhodium (Rh), can be introduced into the modified Li4SiO4 pebbles during the melt-based process, due to the corrosion of Pt-Rh and Pt-Au alloy crucible components. In this study, the surface microstructure, chemical and phase composition of the modified Li4SiO4 pebbles with different contents of the noble metals was analysed. The influence of the noble metals on the radiolysis was evaluated after irradiation with accelerated electrons (E = 5 MeV), up to 12 MGy absorbed dose at 300–345 K in a dry argon atmosphere. Using electron spin resonance (ESR) spectroscopy, it was determined that the noble metals (up to 300 ppm) do not significantly influence the formation and accumulation of radiation-induced defects (RD) in the modified Li4SiO4 pebbles.",

keywords = "Lithium orthosilicate, Noble metals, Radiolysis, Tritium breeding ceramic",

author = "A. Zariņ{\v s} and O. Valtenbergs and G. Ķizāne and A. Supe and S. Tamulevi{\v c}ius and M. Andrulevi{\v c}ius and E. Pajuste and L. Baumane and O. Leys and Kolb, \{M. H.H.\} and R. Knitter",

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year = "2017",

month = nov,

doi = "10.1016/j.fusengdes.2017.01.008",

language = "English",

volume = "124",

pages = "934--939",

journal = "Fusion Engineering and Design",

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TY - JOUR

T1 - Characterisation and radiolysis of modified lithium orthosilicate pebbles with noble metal impurities

AU - Zariņš, A.

AU - Valtenbergs, O.

AU - Ķizāne, G.

AU - Supe, A.

AU - Tamulevičius, S.

AU - Andrulevičius, M.

AU - Pajuste, E.

AU - Baumane, L.

AU - Leys, O.

AU - Kolb, M. H.H.

AU - Knitter, R.

PY - 2017/11

Y1 - 2017/11

N2 - Modified lithium orthosilicate (Li4SiO4) pebbles with additions of titanium dioxide (TiO2) are suggested as an alternative tritium breeding ceramic for the European solid breeder test blanket module. The noble metals – platinum (Pt), gold (Au) and rhodium (Rh), can be introduced into the modified Li4SiO4 pebbles during the melt-based process, due to the corrosion of Pt-Rh and Pt-Au alloy crucible components. In this study, the surface microstructure, chemical and phase composition of the modified Li4SiO4 pebbles with different contents of the noble metals was analysed. The influence of the noble metals on the radiolysis was evaluated after irradiation with accelerated electrons (E = 5 MeV), up to 12 MGy absorbed dose at 300–345 K in a dry argon atmosphere. Using electron spin resonance (ESR) spectroscopy, it was determined that the noble metals (up to 300 ppm) do not significantly influence the formation and accumulation of radiation-induced defects (RD) in the modified Li4SiO4 pebbles.

AB - Modified lithium orthosilicate (Li4SiO4) pebbles with additions of titanium dioxide (TiO2) are suggested as an alternative tritium breeding ceramic for the European solid breeder test blanket module. The noble metals – platinum (Pt), gold (Au) and rhodium (Rh), can be introduced into the modified Li4SiO4 pebbles during the melt-based process, due to the corrosion of Pt-Rh and Pt-Au alloy crucible components. In this study, the surface microstructure, chemical and phase composition of the modified Li4SiO4 pebbles with different contents of the noble metals was analysed. The influence of the noble metals on the radiolysis was evaluated after irradiation with accelerated electrons (E = 5 MeV), up to 12 MGy absorbed dose at 300–345 K in a dry argon atmosphere. Using electron spin resonance (ESR) spectroscopy, it was determined that the noble metals (up to 300 ppm) do not significantly influence the formation and accumulation of radiation-induced defects (RD) in the modified Li4SiO4 pebbles.

KW - Lithium orthosilicate

KW - Noble metals

KW - Radiolysis

KW - Tritium breeding ceramic

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UR - https://www.scopus.com/pages/publications/85009785274

U2 - 10.1016/j.fusengdes.2017.01.008

DO - 10.1016/j.fusengdes.2017.01.008

M3 - Article

AN - SCOPUS:85009785274

SN - 0920-3796

VL - 124

SP - 934

EP - 939

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

ER -

Characterisation and radiolysis of modified lithium orthosilicate pebbles with noble metal impurities

Abstract

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Keywords

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