Full-scale Engineered Barriers Experiment (FEBEX) I - Heating and Monitoring

The first heating phase started in February 1997 and continued until year 2002. Following removal of 1 heater, a second phase runs from 2003. According to the reference concept, the temperature will not exceed 100 degrees at any time. The monitoring system comprises more than 600 sensors reading continuously relevant parameters, e.g. temperature, water content in the buffer, swelling pressure, etc.

A picture Online visualisation system of the FEBEX test : The screen shot shows the position of the electrical heaters in the backfilled tunnel section. Click on the image to view a hi-resolution image (opens in a new window).

A picture This cross section shows the location and output from various sensors in the backfilled tunnel section and the surrounding rock. Click on the image to view a hi-resolution image (opens in a new window).

FEBEX - Measured and predicted normal stresses

Measured and predicted normal stresses. Section F1. Febex “In situ” test.


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

The GTS underground facilities are also available to interested 3rd parties for underground testing and research. The GTS offers cost-effective access to a fully developed, well characterised underground research facility with round the year logistical support - please contact Dr. Ingo Blechschmidt, Head of the Grimsel Test Site, for further details.