Towards advanced welding methods for the ITER vacuum vessel sectors

L. Jones (Corresponding Author), P. Aubert, F. Coste, H. Handroos, Tommi Jokinen, Veli Kujanpää, P. Meja, K. Nightingale, W. Wykes

    Research output: Contribution to journalArticleScientificpeer-review

    39 Citations (Scopus)


    The problem of joining the International Thermonuclear Experimental Reactor (ITER) vacuum vessel (VV) sectors, considering the tolerance requirements of the blanket attachments, and the time required for TIG welding, continues to stimulate EU R&D into power beam welding techniques which can yield fewer passes, less welding time and lower distortion. The previous work on reduced pressure e-beam welding showed that penetration varied with position, fit-up, distance and pressure and single-pass weld control was deemed to be not reliable enough so the work direction changed to an all-e-beam welding procedure where the root weld is carried out with rest-current-control and the fill passes by wire-fill. In addition, a novel method of increasing the possible single-pass weld thickness for overhead positions is investigated demonstrated and now patented. Another solution may be offered with wire-fill NdYAG laser welding, which has demonstrated useable and stable results and proved improved performance over TIG. Preliminary work has shown even further advantages with the introduction of hybrid MIG/Laser welding.
    Original languageEnglish
    Pages (from-to)215-220
    Number of pages6
    JournalFusion Engineering and Design
    Issue number1-4
    Publication statusPublished - 2003
    MoE publication typeA1 Journal article-refereed


    • welding


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