Testing of Methods and Equipment for Deep Borehole Studies

Abstract

Industrial Power Company Ltd. TVO) has tested investigation methods and equipment in a slim 1001 m deep borehole at Lavia, Western Finland. The tests have been an important part in making preparations for preliminary site investigations. According to TVO's site selection program these investigations will cover the years between 1986-92. Geophysical and hydrological borehole investigations have been carried out and groundwater samples taken. Some new techniques like rock stress measurement using hydrofracturing and vertical seismic profiling were tested. Equipment for groundwater sampling hydraulical testing were developed. The experience gained from the tests has been very valuable for planning the field investigations.