Long-term monitoring experiences at the HADES Undergroud Lab and its relevance for radwaste repository monitoring

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Abstract

In the frame of its radwaste disposal research programme, SCK•CEN initiated the construction of the HADES underground research facility more than 30 years ago. Since then, several extensions and a comprehensive experimental programme have provided a large database on monitoring. As a support of the construction, monitoring has allowed to optimise the underground construction techniques in a previously poorly known environment, resulting in a well mastered application of mechanised gallery construction techniques with minimal disturbance and cost. Access to this formation also allows its detailed characterisation and investigation of phenomena (e.g. fracturing and oxidation). Finally, instrumented set-ups allow to test various numerical models by comparing the observations with the predicted behaviour. The specific conditions of the underground laboratory put particular requirements to the sensors. These conditions include the long-term nature (up to decades), the inaccessibility of many sensors after installation, high mechanical and water pressures, and corrosion. The experience gained give an indication on the critical success factors for monitoring of radwaste repositories. It has also become clear one must look beyond the technical part. Issues such as data management, including the handling of “unexpected” measurements, and record keeping are essential for a successful monitoring programme.

Details

Original languageEnglish
Title of host publicationProceedings of the 15th International Conference on Environmental Remediation and Radioactive Waste Management. ICEM 2013 (on CD)
Place of PublicationUnited States
Pages1-7
Publication statusPublished - Sep 2013
EventICEM 2013 - 15th International Conference On Environmental Remediation And Radioactive Waste Management - ASME, Belgoprocess, SCK•CEN, Brussels, Belgium
Duration: 8 Sep 201312 Sep 2013

Conference

ConferenceICEM 2013 - 15th International Conference On Environmental Remediation And Radioactive Waste Management
CountryBelgium
CityBrussels
Period2013-09-082013-09-12

Keywords

  • monitoring, instrumentation, underground research laboratory, radioactive waste repository

ID: 291387