ITER lip seal welding and cutting developments

Bruno Levésy (Corresponding Author), Jean Jacques Cordier, Tommi Jokinen, Veli P. Kujanpää, Miikka Karhu, Robin Le Barbier, Timo Määttä, Jean-Pierre Martins, Yuri Utin

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The welded lip seals form part of the torus primary vacuum boundary in between the port plugs and the vacuum vessel, and are classified as Protection Important Component. In order to refurbish the port plugs or the in-vessel components, port plugs have to be removed from the machine. The lip seal design must enable up to ten opening of the vacuum vessel during the life time operation of the ITER machine. Therefore proven, remote reliable cutting and re-welding are essential, as these operations need to be performed in the port cells in a nuclear environment, where human presence will be restricted. Moreover, the combination of size of the components to be welded (~10. m long vacuum compatible thin welds) and the congested environment close to the core of the machine constraint the type and size of tools to be used.This paper describes the lip seal cutting and welding development programme performed at the VTT Technical Research Centre, Finland. Potential cutting and welding techniques are analyzed and compared. The development of the cutting, TIG and laser welding techniques on samples are presented. Effects of lip seal misalignments and optimization of the 2 welding processes are discussed. Finally, the manufacturing and test of the two 1.2. m. *. 1. m representative mock-ups are presented. The set-up and use of a robotic arm for the mock-up cutting and welding operations are also described.
Original languageEnglish
Pages (from-to)1528-1531
JournalFusion Engineering and Design
Volume98-99
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed
Event28th Symposium of Fusion Technology (SOFT) - San Diego, United States
Duration: 19 Oct 201423 Oct 2014
Conference number: 23

Fingerprint

Seals
Welding
Vacuum
Mockups
Robotic arms
Laser beam welding
Welds

Keywords

  • ITER
  • port plug
  • sealing
  • maintenance
  • lip seal

Cite this

Levésy, B., Cordier, J. J., Jokinen, T., Kujanpää, V. P., Karhu, M., Le Barbier, R., ... Utin, Y. (2015). ITER lip seal welding and cutting developments. Fusion Engineering and Design, 98-99, 1528-1531. https://doi.org/10.1016/j.fusengdes.2015.06.161
Levésy, Bruno ; Cordier, Jean Jacques ; Jokinen, Tommi ; Kujanpää, Veli P. ; Karhu, Miikka ; Le Barbier, Robin ; Määttä, Timo ; Martins, Jean-Pierre ; Utin, Yuri. / ITER lip seal welding and cutting developments. In: Fusion Engineering and Design. 2015 ; Vol. 98-99. pp. 1528-1531.
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abstract = "The welded lip seals form part of the torus primary vacuum boundary in between the port plugs and the vacuum vessel, and are classified as Protection Important Component. In order to refurbish the port plugs or the in-vessel components, port plugs have to be removed from the machine. The lip seal design must enable up to ten opening of the vacuum vessel during the life time operation of the ITER machine. Therefore proven, remote reliable cutting and re-welding are essential, as these operations need to be performed in the port cells in a nuclear environment, where human presence will be restricted. Moreover, the combination of size of the components to be welded (~10. m long vacuum compatible thin welds) and the congested environment close to the core of the machine constraint the type and size of tools to be used.This paper describes the lip seal cutting and welding development programme performed at the VTT Technical Research Centre, Finland. Potential cutting and welding techniques are analyzed and compared. The development of the cutting, TIG and laser welding techniques on samples are presented. Effects of lip seal misalignments and optimization of the 2 welding processes are discussed. Finally, the manufacturing and test of the two 1.2. m. *. 1. m representative mock-ups are presented. The set-up and use of a robotic arm for the mock-up cutting and welding operations are also described.",
keywords = "ITER, port plug, sealing, maintenance, lip seal",
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Levésy, B, Cordier, JJ, Jokinen, T, Kujanpää, VP, Karhu, M, Le Barbier, R, Määttä, T, Martins, J-P & Utin, Y 2015, 'ITER lip seal welding and cutting developments', Fusion Engineering and Design, vol. 98-99, pp. 1528-1531. https://doi.org/10.1016/j.fusengdes.2015.06.161

ITER lip seal welding and cutting developments. / Levésy, Bruno (Corresponding Author); Cordier, Jean Jacques; Jokinen, Tommi; Kujanpää, Veli P.; Karhu, Miikka; Le Barbier, Robin; Määttä, Timo; Martins, Jean-Pierre; Utin, Yuri.

In: Fusion Engineering and Design, Vol. 98-99, 2015, p. 1528-1531.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - ITER lip seal welding and cutting developments

AU - Levésy, Bruno

AU - Cordier, Jean Jacques

AU - Jokinen, Tommi

AU - Kujanpää, Veli P.

AU - Karhu, Miikka

AU - Le Barbier, Robin

AU - Määttä, Timo

AU - Martins, Jean-Pierre

AU - Utin, Yuri

PY - 2015

Y1 - 2015

N2 - The welded lip seals form part of the torus primary vacuum boundary in between the port plugs and the vacuum vessel, and are classified as Protection Important Component. In order to refurbish the port plugs or the in-vessel components, port plugs have to be removed from the machine. The lip seal design must enable up to ten opening of the vacuum vessel during the life time operation of the ITER machine. Therefore proven, remote reliable cutting and re-welding are essential, as these operations need to be performed in the port cells in a nuclear environment, where human presence will be restricted. Moreover, the combination of size of the components to be welded (~10. m long vacuum compatible thin welds) and the congested environment close to the core of the machine constraint the type and size of tools to be used.This paper describes the lip seal cutting and welding development programme performed at the VTT Technical Research Centre, Finland. Potential cutting and welding techniques are analyzed and compared. The development of the cutting, TIG and laser welding techniques on samples are presented. Effects of lip seal misalignments and optimization of the 2 welding processes are discussed. Finally, the manufacturing and test of the two 1.2. m. *. 1. m representative mock-ups are presented. The set-up and use of a robotic arm for the mock-up cutting and welding operations are also described.

AB - The welded lip seals form part of the torus primary vacuum boundary in between the port plugs and the vacuum vessel, and are classified as Protection Important Component. In order to refurbish the port plugs or the in-vessel components, port plugs have to be removed from the machine. The lip seal design must enable up to ten opening of the vacuum vessel during the life time operation of the ITER machine. Therefore proven, remote reliable cutting and re-welding are essential, as these operations need to be performed in the port cells in a nuclear environment, where human presence will be restricted. Moreover, the combination of size of the components to be welded (~10. m long vacuum compatible thin welds) and the congested environment close to the core of the machine constraint the type and size of tools to be used.This paper describes the lip seal cutting and welding development programme performed at the VTT Technical Research Centre, Finland. Potential cutting and welding techniques are analyzed and compared. The development of the cutting, TIG and laser welding techniques on samples are presented. Effects of lip seal misalignments and optimization of the 2 welding processes are discussed. Finally, the manufacturing and test of the two 1.2. m. *. 1. m representative mock-ups are presented. The set-up and use of a robotic arm for the mock-up cutting and welding operations are also described.

KW - ITER

KW - port plug

KW - sealing

KW - maintenance

KW - lip seal

U2 - 10.1016/j.fusengdes.2015.06.161

DO - 10.1016/j.fusengdes.2015.06.161

M3 - Article

VL - 98-99

SP - 1528

EP - 1531

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

SN - 0920-3796

ER -

Levésy B, Cordier JJ, Jokinen T, Kujanpää VP, Karhu M, Le Barbier R et al. ITER lip seal welding and cutting developments. Fusion Engineering and Design. 2015;98-99:1528-1531. https://doi.org/10.1016/j.fusengdes.2015.06.161