Detritiation of JET tiles by laser cleaning

A. Widdowson, J. P. Coad, D. Farcage, D. Hole, Jari Likonen, Tommi Renvall, A. Semerok, P.-Y. Thro, JET-EFDA Contributors

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Abstract

The retention of tritium (T) by carbon based deposits on tokamak surfaces is of increasing concern to the fusion community as the scale of tritium retention by this mechanism could be a limiting factor for the operation of fusion reactors, such as ITER. Hence there is a need to investigate ways of mitigating T retention and also for detritiating surfaces by either desorption of T or removal of tritiated deposits. The results of the removal of codeposits from CFC tiles by pulsed laser ablation are reported here. The results show that it is possible to completely remove a 300μm thick hydrogen isotope rich carbon film at a rate of 12x10
-3m2/hr by this method and that with optimisation of the laser parameters there is scope to improve the treatment rates to provide a useful tool for managing T inventory in tokamaks.
Original languageEnglish
Pages (from-to)51-54
Number of pages4
JournalFusion Science and Technology
Volume54
Issue number1
DOIs
Publication statusPublished - 2008
MoE publication typeA1 Journal article-refereed

Fingerprint

Tritium
tiles
Tile
cleaning
Cleaning
Deposits
tritium
Chlorofluorocarbons
Lasers
Carbon films
Fusion reactors
Laser ablation
Pulsed lasers
deposits
Isotopes
lasers
Hydrogen
chlorofluorocarbons
Desorption
Fusion reactions

Cite this

Widdowson, A., Coad, J. P., Farcage, D., Hole, D., Likonen, J., Renvall, T., ... JET-EFDA Contributors (2008). Detritiation of JET tiles by laser cleaning. Fusion Science and Technology, 54(1), 51-54. https://doi.org/10.13182/FST08-A1763
Widdowson, A. ; Coad, J. P. ; Farcage, D. ; Hole, D. ; Likonen, Jari ; Renvall, Tommi ; Semerok, A. ; Thro, P.-Y. ; JET-EFDA Contributors. / Detritiation of JET tiles by laser cleaning. In: Fusion Science and Technology. 2008 ; Vol. 54, No. 1. pp. 51-54.
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abstract = "The retention of tritium (T) by carbon based deposits on tokamak surfaces is of increasing concern to the fusion community as the scale of tritium retention by this mechanism could be a limiting factor for the operation of fusion reactors, such as ITER. Hence there is a need to investigate ways of mitigating T retention and also for detritiating surfaces by either desorption of T or removal of tritiated deposits. The results of the removal of codeposits from CFC tiles by pulsed laser ablation are reported here. The results show that it is possible to completely remove a 300μm thick hydrogen isotope rich carbon film at a rate of 12x10-3m2/hr by this method and that with optimisation of the laser parameters there is scope to improve the treatment rates to provide a useful tool for managing T inventory in tokamaks.",
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Widdowson, A, Coad, JP, Farcage, D, Hole, D, Likonen, J, Renvall, T, Semerok, A, Thro, P-Y & JET-EFDA Contributors 2008, 'Detritiation of JET tiles by laser cleaning', Fusion Science and Technology, vol. 54, no. 1, pp. 51-54. https://doi.org/10.13182/FST08-A1763

Detritiation of JET tiles by laser cleaning. / Widdowson, A.; Coad, J. P.; Farcage, D.; Hole, D.; Likonen, Jari; Renvall, Tommi; Semerok, A.; Thro, P.-Y.; JET-EFDA Contributors.

In: Fusion Science and Technology, Vol. 54, No. 1, 2008, p. 51-54.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Detritiation of JET tiles by laser cleaning

AU - Widdowson, A.

AU - Coad, J. P.

AU - Farcage, D.

AU - Hole, D.

AU - Likonen, Jari

AU - Renvall, Tommi

AU - Semerok, A.

AU - Thro, P.-Y.

AU - JET-EFDA Contributors,

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AB - The retention of tritium (T) by carbon based deposits on tokamak surfaces is of increasing concern to the fusion community as the scale of tritium retention by this mechanism could be a limiting factor for the operation of fusion reactors, such as ITER. Hence there is a need to investigate ways of mitigating T retention and also for detritiating surfaces by either desorption of T or removal of tritiated deposits. The results of the removal of codeposits from CFC tiles by pulsed laser ablation are reported here. The results show that it is possible to completely remove a 300μm thick hydrogen isotope rich carbon film at a rate of 12x10-3m2/hr by this method and that with optimisation of the laser parameters there is scope to improve the treatment rates to provide a useful tool for managing T inventory in tokamaks.

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Widdowson A, Coad JP, Farcage D, Hole D, Likonen J, Renvall T et al. Detritiation of JET tiles by laser cleaning. Fusion Science and Technology. 2008;54(1):51-54. https://doi.org/10.13182/FST08-A1763