The "in-situ" test is being performed in a drift which was excavated in the northern zone of the Grimsel Test Site.

GTS Plan showing location of FEBEX
Location of the FEBEX experiment


The physical components of the test consist of five basic units:

  1. the drift,
  2. the heating system,
  3. the clay barrier,
  4. the instrumentation
  5. the monitoring and control system.

Tomography of Febex area


Full-scale High Level Waste Engineered Barriers (FEBEX) - In-Situ Testing