Arbeitsbericht NAB 22-50

Long-term Monitoring System of the Stadel-3 Borehole: Installation Report


To provide input for site selection and the safety case for deep geological repositories for radioactive waste, Nagra has drilled a series of deep boreholes in Northern Switzerland. The aim of the drilling campaign was to characterise the Mesozoic sediments of the three remaining siting regions located at the edge of the Northern Alpine Molasse Basin (Fig. 1‑1).

In this report, we describe the installation of a multi-packer-system (MPS) for long-term observation in the Stadel-3-1 borehole. The details of the drilling and characterisation of the borehole are given in Nagra Arbeitsbericht NAB 22-01 Dossier I.