Pre-conceptual design assessment of DEMO remote maintenance

Antony Loving (Corresponding Author), O. Crofts, N. Sykes, D. Iglesias, M. Coleman, J. Thomas, J. Harman, U. Fischer, J. Sanz, Mikko Siuko, M. Mittwollen

    Research output: Contribution to journalArticleScientificpeer-review

    43 Citations (Scopus)


    EDFA, as part of the Power Plant Physics and Technology programme, has been working on the pre-conceptual design of a Demonstration Power Plant (DEMO). As part of this programme, a review of the remote maintenance strategy considered maintenance solutions compatible with expected environmental conditions, whilst showing potential for meeting the plant availability targets. A key finding was that, for practical purposes, the expected radiation levels prohibit the use of complex remote handling operations to replace the first wall. In 2012/2013, these remote maintenance activities were further extended, providing an insight into the requirements, constraints and challenges. In particular, the assessment of blanket and divertor maintenance, in light of the expected radiation conditions and availability, has elaborated the need for a very different approach from that of ITER. This activity has produced some very informative virtual reality simulations of the blanket segments and pipe removal that are exceptionally valuable in communicating the complexity and scale of the required operations. Through these simulations, estimates of the maintenance task durations have been possible demonstrating that a full replacement of the blankets within 6 months could be achieved. The design of the first wall, including the need to use sacrificial limiters must still be investigated. In support of the maintenance operations, a first indication of the requirements of an Active Maintenance Facility (AMF) has been elaborated.
    Original languageEnglish
    Pages (from-to)2246-2250
    JournalFusion Engineering and Design
    Issue number9-10
    Publication statusPublished - 2014
    MoE publication typeA1 Journal article-refereed
    Event11th International Symposium on Fusion Nuclear Technology-11, "ISFNT-11", 2014 - Barcelona, Spain
    Duration: 15 Sept 201420 Sept 2014


    • fusion energy
    • power plants
    • maintenance
    • divertors
    • blankets
    • remote handling


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