[en] The Posiva Flow Log/Difference flow method can be used for the relatively fast determination of water conductivity and hydraulic head in fractures/fractured zones in cored boreholes. In this method, a flow meter and a connected flow guide are used. This report presents the principles and results of the measurements carried out in boreholes KRI, KR2, KR4, KR7, KR8, KR12 and KR14 at the Olkiluoto investigation site between November 2002 and June 2004. All boreholes mentioned above had been measured earlier in their entirety. The measurements in this campaign were performed for control. Some borehole zones that proved to be intact in the previous measurements were not measured. The measuring program varied according to boreholes. The section length of the flow guide was 10 m, 2 m and 0.5 m. The flow into the borehole or from the borehole to the bedrock was measured within the section lengths. In most of the boreholes, this was carried out both during pumping and in natural (unpumped) conditions. Transmissivity (T) and hydraulic head of zones are calculated for the results, if a measurement in natural conditions was performed. The device also includes a sensor for single point resistance (SPR). SPR was always measured in connection with flow measurements, and it was registered when the tool was moving. The electric conductivity of fracture-specific water (EC) was measured in chosen fractures in some of the boreholes. The fractures were chosen on the basis of the measured flow from the fracture to the borehole. The EC of the borehole water was also measured. (orig.)