The radon concentration has been determined several times for groundwater samples collected in sampling campaigns in a growing number of C-FRS borehole intervals. The purpose is to demonstrate the application of radon concentration measurements for fracture characterisation. The equipment and methodology have also been tested with repeated calibration measurements.

Principle for the in-situ measurement of radon concentration.

Groundwater sampling for the measurement of dissolved radon. Photo: comet.

CRIEPI’s Fractured Rock Studies - C-FRS