Validation of Divertor Cassette locking system with a hydraulic jack tool

V. Takalo (Corresponding Author), S. Esque, J. Mattila, M. Vilenius, Jorma Järvenpää, Mikko Siuko, L. Semeraro, M. Irving, C. Damiani

    Research output: Contribution to journalArticleScientificpeer-review

    3 Citations (Scopus)


    The divertor area of ITER vacuum vessel consists of 54 modular cassettes which must be exchanged after every 3–4 years of plasma operations. Divertor Cassettes are locked in the vacuum vessel by means of compressing them against the rails mounted in the inner and outer walls of the vacuum vessel. According to ITER reference cassette locking system, a Divertor Cassette has to be preloaded with a compression force of 360 kN against the vacuum vessel rails. The preloading of the cassettes is carried out with a hydraulic jack tool which is fitted into the cassette body. The Jack will transmit a hydraulic force by pushing the cassette latches against the outer rails, transmitting therefore the required preloading compression force to the cassette. This paper deals with the validation of Divertor Cassette locking system and it also describes the design and testing of a radiation-hard, water hydraulic jack. The validation of Divertor Cassette locking system has been the first Divertor Maintenance operation tested at Divertor Test Platform 2.
    Original languageEnglish
    Pages (from-to)1808-1812
    Number of pages5
    JournalFusion Engineering and Design
    Issue number7-11
    Publication statusPublished - 2009
    MoE publication typeA1 Journal article-refereed
    Event25th Symposium on Fusion Technology, SOFT-25 - Rostock, Germany
    Duration: 15 Sept 200819 Sept 2008


    • Divertor Cassette
    • Remote handling
    • Water hydraulic jack


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