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

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

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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 languageEnglish
JournalFusion Engineering and Design
Volume124
Issue numbernovember
Pages (from-to)934-939
ISSN0920-3796
DOIs
Publication statusPublished - 1. Nov 2017

Fingerprint

Radiolysis
Precious metals
Lithium
Impurities
Rhodium
Platinum
Platinum alloys
Electron spin resonance spectroscopy
Tritium
Argon
Crucibles
Phase composition
Gold
Titanium dioxide
Irradiation
Corrosion
Radiation
Defects
Microstructure
Electrons

Keywords

  • Lithium orthosilicate
  • Noble metals
  • Radiolysis
  • Tritium breeding ceramic

Cite this

Tamulevičius, Sigitas ; Zariņš, A. ; Valtenbergs, O. ; Ķizāne, G. ; Supe, A. ; Andrulevičius, M. ; Pajuste, E. ; Baumane, L. ; Leys, O. ; Kolb, M. H.H. ; Knitter, R. / Characterisation and radiolysis of modified lithium orthosilicate pebbles with noble metal impurities. In: Fusion Engineering and Design. 2017 ; Vol. 124, No. november. pp. 934-939.
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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.",
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Tamulevičius, S, Zariņš, A, Valtenbergs, O, Ķizāne, G, Supe, A, Andrulevičius, M, Pajuste, E, Baumane, L, Leys, O, Kolb, MHH & Knitter, R 2017, 'Characterisation and radiolysis of modified lithium orthosilicate pebbles with noble metal impurities', Fusion Engineering and Design, vol. 124, no. november, pp. 934-939. https://doi.org/10.1016/j.fusengdes.2017.01.008

Characterisation and radiolysis of modified lithium orthosilicate pebbles with noble metal impurities. / Tamulevičius, Sigitas; Zariņš, A.; Valtenbergs, O.; Ķizāne, G.; Supe, A.; Andrulevičius, M.; Pajuste, E.; Baumane, L.; Leys, O.; Kolb, M. H.H.; Knitter, R.

In: Fusion Engineering and Design, Vol. 124, No. november, 01.11.2017, p. 934-939.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

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

AU - Tamulevičius, Sigitas

AU - Zariņš, A.

AU - Valtenbergs, O.

AU - Ķizāne, G.

AU - Supe, A.

AU - Andrulevičius, M.

AU - Pajuste, E.

AU - Baumane, L.

AU - Leys, O.

AU - Kolb, M. H.H.

AU - Knitter, R.

PY - 2017/11/1

Y1 - 2017/11/1

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.

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KW - Noble metals

KW - Radiolysis

KW - Tritium breeding ceramic

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U2 - 10.1016/j.fusengdes.2017.01.008

DO - 10.1016/j.fusengdes.2017.01.008

M3 - Journal article

VL - 124

SP - 934

EP - 939

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

SN - 0920-3796

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