Assessment of long-term sensor performance based on a large THM experiment in the HADES URL

Jan Verstricht, Dries Nackaerts, Xiang Ling Li, Didier Leonard, Séverine Levasseur, Maarten Van Geet

    Research outputpeer-review


    A monitoring plan is an important part of a disposal programme. Monitoring a deep geological repository for the disposal of radioactive waste faces several challenges. These may arise from the technically demanding environment in which the monitoring equipment must operate or from the potentially long period of time during which they must operate. Over the past decades, a lot of experience has been gained in monitoring experiments in underground research laboratories (URL). Since the HADES URL became operational in the 1980s, thousands of sensors have been installed. To document the experience gained in this context, ONDRAF/NIRAS launched a research project to evaluate the performance of the monitoring equipment implemented in the HADES URL. This required developing a method to assess the performance of sensors in a consistent way. The methodology is explained in this paper and illustrated for the instruments installed to monitor the thermo-hydro-mechanical response of Boom Clay to the large scale PRACLAY In Situ Experiment.
    Original languageEnglish
    Article number87
    Number of pages19
    JournalGeological Society, London, Special Publications
    StatePublished - 27 Feb 2023
    Event2022 - Exchange Meeting HADES 40
    - Tabloo, Dessel
    Duration: 9 Dec 20229 Dec 2022

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