[en] In the construction of a reactor container and its enclosure building, it is important to investigate the geology and ground of the destination site. This report is concerned to the outline of the site survey which has been conducted under the plan of the construction of High Flux Reactor in Research Reactor Institute of Kyoto University. The survey was carried out about drawing up the stratgraphical map based on the sounding of boring at 10 positions near the destination site, the estimation of the ground supporting force, the dip of the ground and the stability of stratgraphy. The main results are as follows. (1) the stratgraphy near the destination site is inclined by a few degrees of an angle to the north-west direction, and consists of the layered soils of sand and clay which are a few meter depth, (2) the ground under the basis of the container is firm as the N-values are greater than 50, though it is loose near the surface soil, (3) the supporting force of the ground under the basis was estimated as about 400 t/m², (4) the dip of the ground is small enough to disregard for the design load of 20 t/m², and the disparity dip can not be foreseen as the depth of clayey layer is nearly uniform, (5) the sliding of the ground along the stratgraphy is not expected as the inner rubbing angle of soil is greater than the gradient of the stratgraphy. (auth.)