Electrical Charged Potential Measurements

The electrical charged potential, or mise-à-la-masse method, a well established method in ore exploration, has proven to be an excellent tool for verifying the geological connections in Olkiluoto. The method involves measuring the flow of electricity through the rock. An electrical connection is often an indication of a hydraulic connection, and this knowledge is useful in predicting groundwater movements.

 

Charged potential measurements have been carried out continuously during 2004–2008, and they will be further continued as deemed necessary for research purposes. The surveys are carried out by measuring connections from one drillhole to another, to above ground and to ONKALO. This allows verifying the homogeneity and integrity of structures detected by other methods.

 

The measurements were carried out on the basis of plans laid out by Posiva and Pöyry Environment Oy. The field work was carried out by Suomen Malmi Oy while Astrock Oy participated in results processing and field supervision work.]