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Workreport 2019-2



Fracture Spesific Water Sampling and Electrical Conductivity Measurements at the Olikiluoto Site in Eurajoki, Drillholes OL-KR14, OL-KR56 and OL-KR58


Ylöstalo, R., Komulainen, J., Lamminmäki, T.



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Fracture specific water sampling and electrical conductivity (EC) measurements were performed at selected fractures in drillholes OL-KR14, OL-KR56 and OL-KR58 at the Olkiluoto investigation site during the time period from June to December in 2016. The measurements were conducted using Posiva Flow Log, Difference flow method (PFL DIFF) with a configuration for water sampling (PFL Water Sampler 2, PFL WS2). The purpose of the measurements was to retrieve fracture specific pressurised water samples for groundwater analysis. This report presents the principles of the method and the results of measurements and samplings.

The main task in the investigation programme was water sampling. The incidental measurements were carried out for controlling the quality of the sampling. Flow and single point resistance (SPR) measurements were performed in order to locate the target fractures chosen to be sampled. During the sampling at a target fracture the flow rate, electrical conductivity and temperature of the flowing water were also monitored.


Water sampling, hydrogeochemistry, groundwater, flow, measurement, bedrock, drillhole, electrical conductivity, Posiva Flow Log.


WR 2019-02 rev2_web (pdf) (82.4 MB)


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